#neuraldevelopment — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #neuraldevelopment, aggregated by home.social.
-
DATE: August 13, 2026 at 02:00PM
SOURCE: PSYPOST.ORG** Research quality varies widely from fantastic to small exploratory studies. Please check research methods when conclusions are very important to you. **
-------------------------------------------------TITLE: Why do some children develop ADHD after stressful events while others do not?
Children exposed to stressful life events may face a greater risk of developing ADHD symptoms, but a new study suggests that vulnerability depends partly on family mental health, genetic risk, and brain development. These findings were published in the Journal of Child Psychology and Psychiatry.
ADHD is commonly associated with difficulties involving attention, impulsive behavior, and activity levels. Researchers have long known that both inherited factors and environmental experiences contribute to ADHD. Stressful events during childhood, including violence, serious accidents, or other major disruptions, may interfere with emotional development and brain systems involved in attention and self-control.
Yet exposure to stress is not a straightforward explanation for ADHD. Some children show substantial difficulties after stressful experiences, while others appear relatively resilient. The new study aimed to identify the factors that might explain these differences.
Led by Seung Yun Choi of Seoul National University, the research team examined data from the Adolescent Brain Cognitive Development study. The initial group included 6,303 children, 46.8 percent of whom were female, aged approximately 9.9 years at the beginning of the study. The children were assessed again after one year and two years.
The researchers considered several types of information, including ADHD symptoms, stressful life events, parental mental health difficulties, genetic measures, and connections between brain regions. Choi and colleagues then utilized a machine-learning approach, an advanced form of data analysis, to examine the complex relationships between these factors.
The results revealed that stressful experiences were associated with increased ADHD symptoms at both follow-up points. However, the size of this association varied considerably between children. At the one-year follow-up, children considered most vulnerable had higher levels of parental depression and parental ADHD. They also differed from lower-risk children on a genetic measure related to smoking behavior.
By the two-year follow-up, parental mental health problems remained important, and a higher genetic risk score for ADHD also became a significant factor. The researchers also identified differences in the physical connections between parts of the brain involved in planning, attention, and behavioral control.
The contrast between the groups was substantial. At one year, the estimated effect of stressful events was more than twice as large in the highest-risk group as in the lowest-risk group. A similar pattern was observed after two years.
The authors emphasized that their findings “underscore the importance of integrating environmental, genetic, and neural variables to identify children vulnerable or resilient to developing ADHD symptoms following early-life stress.”
The findings do not mean that genes determine whether a child will develop ADHD, nor that family mental health difficulties inevitably lead to symptoms. Instead, they suggest that children may differ in how strongly they respond to stressful environments. Family support, early assistance, and treatment for parental mental health problems could therefore be important parts of prevention.
The study has several limitations. For instance, the definition of stressful life events the authors utilized is based on the level of exposure, which may not adequately capture the subjective intensity of these experiences.
The study, “Individual differences in effects of stressful life events on childhood ADHD: genetic, neural, and familial contributions,” was authored by Seung Yun Choi, Jinwoo Lee, Junghoon Park, Eunji Lee, Bo-Gyeom Kim, Gakyung Kim, Yoonjung Yoonie Joo, and Jiook Cha.
-------------------------------------------------
Private, vetted email list for mental health professionals: https://www.clinicians-exchange.org
Unofficial Psychology Today Xitter to toot feed at Psych Today Unofficial Bot @PTUnofficialBot
-------------------------------------------------
#psychology #counseling #socialwork #psychotherapy @psychotherapist @psychotherapists @psychology @socialpsych @socialwork @psychiatry #mentalhealth #psychiatry #healthcare #depression #psychotherapist #ADHD #ChildDevelopment #StressAndADHD #FamilyMentalHealth #Genetics #NeuralDevelopment #BrainConnections #AdolescentBrainCognition #MentalHealthAwareness #EarlyIntervention
-
DATE: August 13, 2026 at 02:00PM
SOURCE: PSYPOST.ORG** Research quality varies widely from fantastic to small exploratory studies. Please check research methods when conclusions are very important to you. **
-------------------------------------------------TITLE: Why do some children develop ADHD after stressful events while others do not?
Children exposed to stressful life events may face a greater risk of developing ADHD symptoms, but a new study suggests that vulnerability depends partly on family mental health, genetic risk, and brain development. These findings were published in the Journal of Child Psychology and Psychiatry.
ADHD is commonly associated with difficulties involving attention, impulsive behavior, and activity levels. Researchers have long known that both inherited factors and environmental experiences contribute to ADHD. Stressful events during childhood, including violence, serious accidents, or other major disruptions, may interfere with emotional development and brain systems involved in attention and self-control.
Yet exposure to stress is not a straightforward explanation for ADHD. Some children show substantial difficulties after stressful experiences, while others appear relatively resilient. The new study aimed to identify the factors that might explain these differences.
Led by Seung Yun Choi of Seoul National University, the research team examined data from the Adolescent Brain Cognitive Development study. The initial group included 6,303 children, 46.8 percent of whom were female, aged approximately 9.9 years at the beginning of the study. The children were assessed again after one year and two years.
The researchers considered several types of information, including ADHD symptoms, stressful life events, parental mental health difficulties, genetic measures, and connections between brain regions. Choi and colleagues then utilized a machine-learning approach, an advanced form of data analysis, to examine the complex relationships between these factors.
The results revealed that stressful experiences were associated with increased ADHD symptoms at both follow-up points. However, the size of this association varied considerably between children. At the one-year follow-up, children considered most vulnerable had higher levels of parental depression and parental ADHD. They also differed from lower-risk children on a genetic measure related to smoking behavior.
By the two-year follow-up, parental mental health problems remained important, and a higher genetic risk score for ADHD also became a significant factor. The researchers also identified differences in the physical connections between parts of the brain involved in planning, attention, and behavioral control.
The contrast between the groups was substantial. At one year, the estimated effect of stressful events was more than twice as large in the highest-risk group as in the lowest-risk group. A similar pattern was observed after two years.
The authors emphasized that their findings “underscore the importance of integrating environmental, genetic, and neural variables to identify children vulnerable or resilient to developing ADHD symptoms following early-life stress.”
The findings do not mean that genes determine whether a child will develop ADHD, nor that family mental health difficulties inevitably lead to symptoms. Instead, they suggest that children may differ in how strongly they respond to stressful environments. Family support, early assistance, and treatment for parental mental health problems could therefore be important parts of prevention.
The study has several limitations. For instance, the definition of stressful life events the authors utilized is based on the level of exposure, which may not adequately capture the subjective intensity of these experiences.
The study, “Individual differences in effects of stressful life events on childhood ADHD: genetic, neural, and familial contributions,” was authored by Seung Yun Choi, Jinwoo Lee, Junghoon Park, Eunji Lee, Bo-Gyeom Kim, Gakyung Kim, Yoonjung Yoonie Joo, and Jiook Cha.
-------------------------------------------------
Private, vetted email list for mental health professionals: https://www.clinicians-exchange.org
Unofficial Psychology Today Xitter to toot feed at Psych Today Unofficial Bot @PTUnofficialBot
-------------------------------------------------
#psychology #counseling #socialwork #psychotherapy @psychotherapist @psychotherapists @psychology @socialpsych @socialwork @psychiatry #mentalhealth #psychiatry #healthcare #depression #psychotherapist #ADHD #ChildDevelopment #StressAndADHD #FamilyMentalHealth #Genetics #NeuralDevelopment #BrainConnections #AdolescentBrainCognition #MentalHealthAwareness #EarlyIntervention
-
DATE: August 13, 2026 at 02:00PM
SOURCE: PSYPOST.ORG** Research quality varies widely from fantastic to small exploratory studies. Please check research methods when conclusions are very important to you. **
-------------------------------------------------TITLE: Why do some children develop ADHD after stressful events while others do not?
Children exposed to stressful life events may face a greater risk of developing ADHD symptoms, but a new study suggests that vulnerability depends partly on family mental health, genetic risk, and brain development. These findings were published in the Journal of Child Psychology and Psychiatry.
ADHD is commonly associated with difficulties involving attention, impulsive behavior, and activity levels. Researchers have long known that both inherited factors and environmental experiences contribute to ADHD. Stressful events during childhood, including violence, serious accidents, or other major disruptions, may interfere with emotional development and brain systems involved in attention and self-control.
Yet exposure to stress is not a straightforward explanation for ADHD. Some children show substantial difficulties after stressful experiences, while others appear relatively resilient. The new study aimed to identify the factors that might explain these differences.
Led by Seung Yun Choi of Seoul National University, the research team examined data from the Adolescent Brain Cognitive Development study. The initial group included 6,303 children, 46.8 percent of whom were female, aged approximately 9.9 years at the beginning of the study. The children were assessed again after one year and two years.
The researchers considered several types of information, including ADHD symptoms, stressful life events, parental mental health difficulties, genetic measures, and connections between brain regions. Choi and colleagues then utilized a machine-learning approach, an advanced form of data analysis, to examine the complex relationships between these factors.
The results revealed that stressful experiences were associated with increased ADHD symptoms at both follow-up points. However, the size of this association varied considerably between children. At the one-year follow-up, children considered most vulnerable had higher levels of parental depression and parental ADHD. They also differed from lower-risk children on a genetic measure related to smoking behavior.
By the two-year follow-up, parental mental health problems remained important, and a higher genetic risk score for ADHD also became a significant factor. The researchers also identified differences in the physical connections between parts of the brain involved in planning, attention, and behavioral control.
The contrast between the groups was substantial. At one year, the estimated effect of stressful events was more than twice as large in the highest-risk group as in the lowest-risk group. A similar pattern was observed after two years.
The authors emphasized that their findings “underscore the importance of integrating environmental, genetic, and neural variables to identify children vulnerable or resilient to developing ADHD symptoms following early-life stress.”
The findings do not mean that genes determine whether a child will develop ADHD, nor that family mental health difficulties inevitably lead to symptoms. Instead, they suggest that children may differ in how strongly they respond to stressful environments. Family support, early assistance, and treatment for parental mental health problems could therefore be important parts of prevention.
The study has several limitations. For instance, the definition of stressful life events the authors utilized is based on the level of exposure, which may not adequately capture the subjective intensity of these experiences.
The study, “Individual differences in effects of stressful life events on childhood ADHD: genetic, neural, and familial contributions,” was authored by Seung Yun Choi, Jinwoo Lee, Junghoon Park, Eunji Lee, Bo-Gyeom Kim, Gakyung Kim, Yoonjung Yoonie Joo, and Jiook Cha.
-------------------------------------------------
Private, vetted email list for mental health professionals: https://www.clinicians-exchange.org
Unofficial Psychology Today Xitter to toot feed at Psych Today Unofficial Bot @PTUnofficialBot
-------------------------------------------------
#psychology #counseling #socialwork #psychotherapy @psychotherapist @psychotherapists @psychology @socialpsych @socialwork @psychiatry #mentalhealth #psychiatry #healthcare #depression #psychotherapist #ADHD #ChildDevelopment #StressAndADHD #FamilyMentalHealth #Genetics #NeuralDevelopment #BrainConnections #AdolescentBrainCognition #MentalHealthAwareness #EarlyIntervention
-
DATE: July 15, 2026 at 02:00PM
SOURCE: PSYPOST.ORG** Research quality varies widely from fantastic to small exploratory studies. Please check research methods when conclusions are very important to you. **
-------------------------------------------------TITLE: High fluoride exposure breaks down brain cell structures in laboratory mice
URL: https://www.psypost.org/high-fluoride-exposure-breaks-down-brain-cell-structures-in-laboratory-mice/
Exposure to elevated levels of sodium fluoride might impair cognitive abilities by altering how brain cells grow and communicate. A new small study of mice and lab-grown tissues shows that excessive amounts of this chemical disrupt the structural proteins necessary for healthy neural connections. The findings were recently published in the journal Brain Research.
Fluoride is an active nonmetal element found widely in the natural world. In small trace amounts, it provides benefits to human health. Dental professionals often recommend low concentrations to harden enamel and prevent tooth decay.
However, excessive exposure over long periods poses systemic health risks. In many regions, surface and groundwater naturally contain elevated levels of the mineral. This occurs when groundwater flows through surrounding rock formations that contain large deposits of fluorite. Communities relying on these untreated water sources can experience chronic fluoride toxicity.
Over time, toxic amounts of the mineral can accumulate in the body. Beyond physical ailments affecting the skeletal framework, high chemical exposures alter the central nervous system. Previous observations in human populations suggest that individuals dwelling in high-fluoride geographic areas often score lower on intelligence tests compared to those living in low-fluoride zones.
The biological mechanisms behind this cognitive decline are largely a mystery to the scientific community, though the topic is drawing increased academic scrutiny. A separate paper published early in 2024 indicated a link between maternal fluoride levels and behavioral issues in toddlers, pointing toward early developmental vulnerabilities. To investigate exactly how the chemical damages neural tissues, lead author Lingli Chen and a team of researchers at the Henan Institute of Science and Technology in China conducted laboratory experiments.
The researchers decided to focus on specific proteins that manage the development and structural stability of brain networks. For the brain to process information and form memories, its nerve cells must communicate effectively. They do this by sending chemical signals across tiny gaps known as synapses.
The receiving and sending ends of these neural connections constantly grow, shrink, and adapt based on an organism’s learning experiences. This adaptable cellular behavior relies on a microscopic internal scaffolding called the cytoskeleton. Several specialized proteins maintain this internal framework and guide the precise formation of new neural branches.
The researchers tracked three prominent structural markers: drebrin, postsynaptic density protein 95, and growth-associated protein 43. Drebrin stabilizes the internal skeleton and helps shape the receiving antennas of neurons. Postsynaptic density protein 95 anchors the receiving end of a synapse, ensuring that signals are caught properly. Growth-associated protein 43 guides the tip of a growing nerve fiber toward its intended target.
To test how fluoride affects these proteins, the research team designed a small study using thirty female mice. After a period of initial acclimation, they divided the animals into three equal experimental groups. One group drank pure deionized water, the second drank water containing fifty milligrams per liter of sodium fluoride, and the third group drank water with one hundred milligrams per liter.
The exposure lasted for five months. Afterward, the team evaluated the learning and memory capabilities of the animals using a behavioral technique known as a step-down test. Researchers temporarily placed the mice on an insulated elevated platform inside a designated testing chamber.
The metallic grid floor surrounding the platform delivered a mild electrical shock. Out of natural instinct, a placed mouse will jump off the elevated stage, but it should quickly learn to stay in place to avoid the uncomfortable floor. The scientists recorded how many times the animals mistakenly jumped down, counting each jump as an error in avoidance memory.
The behavioral results indicated a distinct drop in cognitive performance for the experimental groups. Mice drinking the tainted water experienced weight loss and reductions in overall brain weight. During the testing phase, the animals exposed to the medium dose of fluoride made more errors than those drinking pure water. The highest dose group also made more errors, though the results for that specific comparison were not statistically significant.
Next, the team examined the animal brain tissues using molecular analysis techniques. They measured messenger RNA, which acts as the genetic instructions copied from DNA to build structural proteins. They also measured the final architectural proteins using a laboratory method that identifies specific cellular molecules.
In the animals exposed to the highest levels of fluoride, the genetic instructions for building postsynaptic density protein 95 dropped. The protein levels for drebrin also showed a downward trend after persistent exposure, though the measured changes were not statistically significant.
The blueprints for growth-associated protein 43 also declined as the dose of the chemical increased. Oddly, the physical protein levels for this specific marker actually increased in the low-dose group. The researchers suspect this represents an early bodily compensation mechanism, where the organism attempts to repair initial neural damage by rapidly producing more growth proteins.
To isolate the cellular mechanisms without the interference of a whole animal body, the team conducted a secondary experiment. They utilized a common line of lab-grown cells originally derived from the mouse hippocampus. The hippocampus is a specialized brain region essential for spatial learning and memory consolidation.
The scientists exposed these cultured cells to various concentrations of sodium fluoride, spanning from zero up to fifty millimolar, for twenty-four hours. They observed the samples using scanning laser microscopes. To visualize the microscopic anatomy, they treated the cells with specific fluorescent dyes that bind to the cellular skeleton and light up under the laser equipment.
To ensure their cell counts were precise, the researchers recorded the optical densities of the tissue layers. They found that low doses of half a millimolar had little impact on the cells. However, jumping to two millimolar concentrations prompted a sharp die-off in the artificial environment, halting cell proliferation.
The surviving units exhibited severe physical deformities under the laser microscope. Their branch-like extensions, known as dendrites, began to atrophy. In some samples, the extensions disappeared entirely. The number of connection points between neighboring cells dropped. The internal protein network, particularly a structural component called F-actin, completely lost its dense matrix.
Molecular tests on the cell cultures mirrored the earlier animal results. After a day of exposure, the cells showed a steep decline in the production of drebrin, postsynaptic density protein 95, and growth-associated protein 43. Without these building blocks, the nerve cells simply could not maintain their intended structural shapes.
The results from both the live animals and the isolated cells point toward a disruption in fundamental synaptic structure. By halting the normal production of structural scaffolding materials, excessive fluoride appears to physically degrade the memory networks of the brain. The scientists noted that the specific biological effects depend heavily on the severity of the exposure.
There are a few caveats to consider regarding this particular research approach. The chemical concentrations used in the laboratory experiments were exceptionally high. Natural drinking water rarely approaches the extreme levels applied to the mice and tissues in this setup.
Additionally, while the results demonstrate a strong physiological correlation between toxic exposure and protein degradation, they do not establish an absolute sequential chain of events. The researchers noted that further genetic experiments are necessary to prove causality. In the future, the team plans to use larger samples and environmental concentrations closer to natural human exposures.
The study, “Sodium fluoride exposure induced cognitive impairment via disorders synaptic protein expression and neuronal development in mice brain,” was authored by Lingli Chen, Rui Wang, Penghuan Jia, Qian Jiang, Siyuan An, Zhihong Yin, Dongfang Hu, Hongmei Ning, and Yaming Ge.
URL: https://www.psypost.org/high-fluoride-exposure-breaks-down-brain-cell-structures-in-laboratory-mice/
-------------------------------------------------
Private, vetted email list for mental health professionals: https://www.clinicians-exchange.org
Unofficial Psychology Today Xitter to toot feed at Psych Today Unofficial Bot @PTUnofficialBot
-------------------------------------------------
#psychology #counseling #socialwork #psychotherapy @psychotherapist @psychotherapists @psychology @socialpsych @socialwork @psychiatry #mentalhealth #psychiatry #healthcare #depression #psychotherapist #FluorideAndBrain #NeuralDevelopment #SynapticProtein #Drebrin #PostsynapticDensity95 #GrowthAssociatedProtein43 #CognitiveImpairment #MouseStudy #Neuroscience #BrainResearch
-
DATE: July 15, 2026 at 02:00PM
SOURCE: PSYPOST.ORG** Research quality varies widely from fantastic to small exploratory studies. Please check research methods when conclusions are very important to you. **
-------------------------------------------------TITLE: High fluoride exposure breaks down brain cell structures in laboratory mice
URL: https://www.psypost.org/high-fluoride-exposure-breaks-down-brain-cell-structures-in-laboratory-mice/
Exposure to elevated levels of sodium fluoride might impair cognitive abilities by altering how brain cells grow and communicate. A new small study of mice and lab-grown tissues shows that excessive amounts of this chemical disrupt the structural proteins necessary for healthy neural connections. The findings were recently published in the journal Brain Research.
Fluoride is an active nonmetal element found widely in the natural world. In small trace amounts, it provides benefits to human health. Dental professionals often recommend low concentrations to harden enamel and prevent tooth decay.
However, excessive exposure over long periods poses systemic health risks. In many regions, surface and groundwater naturally contain elevated levels of the mineral. This occurs when groundwater flows through surrounding rock formations that contain large deposits of fluorite. Communities relying on these untreated water sources can experience chronic fluoride toxicity.
Over time, toxic amounts of the mineral can accumulate in the body. Beyond physical ailments affecting the skeletal framework, high chemical exposures alter the central nervous system. Previous observations in human populations suggest that individuals dwelling in high-fluoride geographic areas often score lower on intelligence tests compared to those living in low-fluoride zones.
The biological mechanisms behind this cognitive decline are largely a mystery to the scientific community, though the topic is drawing increased academic scrutiny. A separate paper published early in 2024 indicated a link between maternal fluoride levels and behavioral issues in toddlers, pointing toward early developmental vulnerabilities. To investigate exactly how the chemical damages neural tissues, lead author Lingli Chen and a team of researchers at the Henan Institute of Science and Technology in China conducted laboratory experiments.
The researchers decided to focus on specific proteins that manage the development and structural stability of brain networks. For the brain to process information and form memories, its nerve cells must communicate effectively. They do this by sending chemical signals across tiny gaps known as synapses.
The receiving and sending ends of these neural connections constantly grow, shrink, and adapt based on an organism’s learning experiences. This adaptable cellular behavior relies on a microscopic internal scaffolding called the cytoskeleton. Several specialized proteins maintain this internal framework and guide the precise formation of new neural branches.
The researchers tracked three prominent structural markers: drebrin, postsynaptic density protein 95, and growth-associated protein 43. Drebrin stabilizes the internal skeleton and helps shape the receiving antennas of neurons. Postsynaptic density protein 95 anchors the receiving end of a synapse, ensuring that signals are caught properly. Growth-associated protein 43 guides the tip of a growing nerve fiber toward its intended target.
To test how fluoride affects these proteins, the research team designed a small study using thirty female mice. After a period of initial acclimation, they divided the animals into three equal experimental groups. One group drank pure deionized water, the second drank water containing fifty milligrams per liter of sodium fluoride, and the third group drank water with one hundred milligrams per liter.
The exposure lasted for five months. Afterward, the team evaluated the learning and memory capabilities of the animals using a behavioral technique known as a step-down test. Researchers temporarily placed the mice on an insulated elevated platform inside a designated testing chamber.
The metallic grid floor surrounding the platform delivered a mild electrical shock. Out of natural instinct, a placed mouse will jump off the elevated stage, but it should quickly learn to stay in place to avoid the uncomfortable floor. The scientists recorded how many times the animals mistakenly jumped down, counting each jump as an error in avoidance memory.
The behavioral results indicated a distinct drop in cognitive performance for the experimental groups. Mice drinking the tainted water experienced weight loss and reductions in overall brain weight. During the testing phase, the animals exposed to the medium dose of fluoride made more errors than those drinking pure water. The highest dose group also made more errors, though the results for that specific comparison were not statistically significant.
Next, the team examined the animal brain tissues using molecular analysis techniques. They measured messenger RNA, which acts as the genetic instructions copied from DNA to build structural proteins. They also measured the final architectural proteins using a laboratory method that identifies specific cellular molecules.
In the animals exposed to the highest levels of fluoride, the genetic instructions for building postsynaptic density protein 95 dropped. The protein levels for drebrin also showed a downward trend after persistent exposure, though the measured changes were not statistically significant.
The blueprints for growth-associated protein 43 also declined as the dose of the chemical increased. Oddly, the physical protein levels for this specific marker actually increased in the low-dose group. The researchers suspect this represents an early bodily compensation mechanism, where the organism attempts to repair initial neural damage by rapidly producing more growth proteins.
To isolate the cellular mechanisms without the interference of a whole animal body, the team conducted a secondary experiment. They utilized a common line of lab-grown cells originally derived from the mouse hippocampus. The hippocampus is a specialized brain region essential for spatial learning and memory consolidation.
The scientists exposed these cultured cells to various concentrations of sodium fluoride, spanning from zero up to fifty millimolar, for twenty-four hours. They observed the samples using scanning laser microscopes. To visualize the microscopic anatomy, they treated the cells with specific fluorescent dyes that bind to the cellular skeleton and light up under the laser equipment.
To ensure their cell counts were precise, the researchers recorded the optical densities of the tissue layers. They found that low doses of half a millimolar had little impact on the cells. However, jumping to two millimolar concentrations prompted a sharp die-off in the artificial environment, halting cell proliferation.
The surviving units exhibited severe physical deformities under the laser microscope. Their branch-like extensions, known as dendrites, began to atrophy. In some samples, the extensions disappeared entirely. The number of connection points between neighboring cells dropped. The internal protein network, particularly a structural component called F-actin, completely lost its dense matrix.
Molecular tests on the cell cultures mirrored the earlier animal results. After a day of exposure, the cells showed a steep decline in the production of drebrin, postsynaptic density protein 95, and growth-associated protein 43. Without these building blocks, the nerve cells simply could not maintain their intended structural shapes.
The results from both the live animals and the isolated cells point toward a disruption in fundamental synaptic structure. By halting the normal production of structural scaffolding materials, excessive fluoride appears to physically degrade the memory networks of the brain. The scientists noted that the specific biological effects depend heavily on the severity of the exposure.
There are a few caveats to consider regarding this particular research approach. The chemical concentrations used in the laboratory experiments were exceptionally high. Natural drinking water rarely approaches the extreme levels applied to the mice and tissues in this setup.
Additionally, while the results demonstrate a strong physiological correlation between toxic exposure and protein degradation, they do not establish an absolute sequential chain of events. The researchers noted that further genetic experiments are necessary to prove causality. In the future, the team plans to use larger samples and environmental concentrations closer to natural human exposures.
The study, “Sodium fluoride exposure induced cognitive impairment via disorders synaptic protein expression and neuronal development in mice brain,” was authored by Lingli Chen, Rui Wang, Penghuan Jia, Qian Jiang, Siyuan An, Zhihong Yin, Dongfang Hu, Hongmei Ning, and Yaming Ge.
URL: https://www.psypost.org/high-fluoride-exposure-breaks-down-brain-cell-structures-in-laboratory-mice/
-------------------------------------------------
Private, vetted email list for mental health professionals: https://www.clinicians-exchange.org
Unofficial Psychology Today Xitter to toot feed at Psych Today Unofficial Bot @PTUnofficialBot
-------------------------------------------------
#psychology #counseling #socialwork #psychotherapy @psychotherapist @psychotherapists @psychology @socialpsych @socialwork @psychiatry #mentalhealth #psychiatry #healthcare #depression #psychotherapist #FluorideAndBrain #NeuralDevelopment #SynapticProtein #Drebrin #PostsynapticDensity95 #GrowthAssociatedProtein43 #CognitiveImpairment #MouseStudy #Neuroscience #BrainResearch
-
DATE: July 15, 2026 at 02:00PM
SOURCE: PSYPOST.ORG** Research quality varies widely from fantastic to small exploratory studies. Please check research methods when conclusions are very important to you. **
-------------------------------------------------TITLE: High fluoride exposure breaks down brain cell structures in laboratory mice
URL: https://www.psypost.org/high-fluoride-exposure-breaks-down-brain-cell-structures-in-laboratory-mice/
Exposure to elevated levels of sodium fluoride might impair cognitive abilities by altering how brain cells grow and communicate. A new small study of mice and lab-grown tissues shows that excessive amounts of this chemical disrupt the structural proteins necessary for healthy neural connections. The findings were recently published in the journal Brain Research.
Fluoride is an active nonmetal element found widely in the natural world. In small trace amounts, it provides benefits to human health. Dental professionals often recommend low concentrations to harden enamel and prevent tooth decay.
However, excessive exposure over long periods poses systemic health risks. In many regions, surface and groundwater naturally contain elevated levels of the mineral. This occurs when groundwater flows through surrounding rock formations that contain large deposits of fluorite. Communities relying on these untreated water sources can experience chronic fluoride toxicity.
Over time, toxic amounts of the mineral can accumulate in the body. Beyond physical ailments affecting the skeletal framework, high chemical exposures alter the central nervous system. Previous observations in human populations suggest that individuals dwelling in high-fluoride geographic areas often score lower on intelligence tests compared to those living in low-fluoride zones.
The biological mechanisms behind this cognitive decline are largely a mystery to the scientific community, though the topic is drawing increased academic scrutiny. A separate paper published early in 2024 indicated a link between maternal fluoride levels and behavioral issues in toddlers, pointing toward early developmental vulnerabilities. To investigate exactly how the chemical damages neural tissues, lead author Lingli Chen and a team of researchers at the Henan Institute of Science and Technology in China conducted laboratory experiments.
The researchers decided to focus on specific proteins that manage the development and structural stability of brain networks. For the brain to process information and form memories, its nerve cells must communicate effectively. They do this by sending chemical signals across tiny gaps known as synapses.
The receiving and sending ends of these neural connections constantly grow, shrink, and adapt based on an organism’s learning experiences. This adaptable cellular behavior relies on a microscopic internal scaffolding called the cytoskeleton. Several specialized proteins maintain this internal framework and guide the precise formation of new neural branches.
The researchers tracked three prominent structural markers: drebrin, postsynaptic density protein 95, and growth-associated protein 43. Drebrin stabilizes the internal skeleton and helps shape the receiving antennas of neurons. Postsynaptic density protein 95 anchors the receiving end of a synapse, ensuring that signals are caught properly. Growth-associated protein 43 guides the tip of a growing nerve fiber toward its intended target.
To test how fluoride affects these proteins, the research team designed a small study using thirty female mice. After a period of initial acclimation, they divided the animals into three equal experimental groups. One group drank pure deionized water, the second drank water containing fifty milligrams per liter of sodium fluoride, and the third group drank water with one hundred milligrams per liter.
The exposure lasted for five months. Afterward, the team evaluated the learning and memory capabilities of the animals using a behavioral technique known as a step-down test. Researchers temporarily placed the mice on an insulated elevated platform inside a designated testing chamber.
The metallic grid floor surrounding the platform delivered a mild electrical shock. Out of natural instinct, a placed mouse will jump off the elevated stage, but it should quickly learn to stay in place to avoid the uncomfortable floor. The scientists recorded how many times the animals mistakenly jumped down, counting each jump as an error in avoidance memory.
The behavioral results indicated a distinct drop in cognitive performance for the experimental groups. Mice drinking the tainted water experienced weight loss and reductions in overall brain weight. During the testing phase, the animals exposed to the medium dose of fluoride made more errors than those drinking pure water. The highest dose group also made more errors, though the results for that specific comparison were not statistically significant.
Next, the team examined the animal brain tissues using molecular analysis techniques. They measured messenger RNA, which acts as the genetic instructions copied from DNA to build structural proteins. They also measured the final architectural proteins using a laboratory method that identifies specific cellular molecules.
In the animals exposed to the highest levels of fluoride, the genetic instructions for building postsynaptic density protein 95 dropped. The protein levels for drebrin also showed a downward trend after persistent exposure, though the measured changes were not statistically significant.
The blueprints for growth-associated protein 43 also declined as the dose of the chemical increased. Oddly, the physical protein levels for this specific marker actually increased in the low-dose group. The researchers suspect this represents an early bodily compensation mechanism, where the organism attempts to repair initial neural damage by rapidly producing more growth proteins.
To isolate the cellular mechanisms without the interference of a whole animal body, the team conducted a secondary experiment. They utilized a common line of lab-grown cells originally derived from the mouse hippocampus. The hippocampus is a specialized brain region essential for spatial learning and memory consolidation.
The scientists exposed these cultured cells to various concentrations of sodium fluoride, spanning from zero up to fifty millimolar, for twenty-four hours. They observed the samples using scanning laser microscopes. To visualize the microscopic anatomy, they treated the cells with specific fluorescent dyes that bind to the cellular skeleton and light up under the laser equipment.
To ensure their cell counts were precise, the researchers recorded the optical densities of the tissue layers. They found that low doses of half a millimolar had little impact on the cells. However, jumping to two millimolar concentrations prompted a sharp die-off in the artificial environment, halting cell proliferation.
The surviving units exhibited severe physical deformities under the laser microscope. Their branch-like extensions, known as dendrites, began to atrophy. In some samples, the extensions disappeared entirely. The number of connection points between neighboring cells dropped. The internal protein network, particularly a structural component called F-actin, completely lost its dense matrix.
Molecular tests on the cell cultures mirrored the earlier animal results. After a day of exposure, the cells showed a steep decline in the production of drebrin, postsynaptic density protein 95, and growth-associated protein 43. Without these building blocks, the nerve cells simply could not maintain their intended structural shapes.
The results from both the live animals and the isolated cells point toward a disruption in fundamental synaptic structure. By halting the normal production of structural scaffolding materials, excessive fluoride appears to physically degrade the memory networks of the brain. The scientists noted that the specific biological effects depend heavily on the severity of the exposure.
There are a few caveats to consider regarding this particular research approach. The chemical concentrations used in the laboratory experiments were exceptionally high. Natural drinking water rarely approaches the extreme levels applied to the mice and tissues in this setup.
Additionally, while the results demonstrate a strong physiological correlation between toxic exposure and protein degradation, they do not establish an absolute sequential chain of events. The researchers noted that further genetic experiments are necessary to prove causality. In the future, the team plans to use larger samples and environmental concentrations closer to natural human exposures.
The study, “Sodium fluoride exposure induced cognitive impairment via disorders synaptic protein expression and neuronal development in mice brain,” was authored by Lingli Chen, Rui Wang, Penghuan Jia, Qian Jiang, Siyuan An, Zhihong Yin, Dongfang Hu, Hongmei Ning, and Yaming Ge.
URL: https://www.psypost.org/high-fluoride-exposure-breaks-down-brain-cell-structures-in-laboratory-mice/
-------------------------------------------------
Private, vetted email list for mental health professionals: https://www.clinicians-exchange.org
Unofficial Psychology Today Xitter to toot feed at Psych Today Unofficial Bot @PTUnofficialBot
-------------------------------------------------
#psychology #counseling #socialwork #psychotherapy @psychotherapist @psychotherapists @psychology @socialpsych @socialwork @psychiatry #mentalhealth #psychiatry #healthcare #depression #psychotherapist #FluorideAndBrain #NeuralDevelopment #SynapticProtein #Drebrin #PostsynapticDensity95 #GrowthAssociatedProtein43 #CognitiveImpairment #MouseStudy #Neuroscience #BrainResearch
-
"These observations argue that both local intrajunctional and long-distance interjunctional synaptic competition are activity-mediated and that the structure of mature neural circuits arises from the activity patterns of developing circuits."
From: "Connectomic evidence that ordered activity drives neuromuscular network formation", Yaron Meirovitch et al. 2026 (Lichtman lab).
https://www.nature.com/articles/s41593-026-02344-7 -
"These observations argue that both local intrajunctional and long-distance interjunctional synaptic competition are activity-mediated and that the structure of mature neural circuits arises from the activity patterns of developing circuits."
From: "Connectomic evidence that ordered activity drives neuromuscular network formation", Yaron Meirovitch et al. 2026 (Lichtman lab).
https://www.nature.com/articles/s41593-026-02344-7 -
"These observations argue that both local intrajunctional and long-distance interjunctional synaptic competition are activity-mediated and that the structure of mature neural circuits arises from the activity patterns of developing circuits."
From: "Connectomic evidence that ordered activity drives neuromuscular network formation", Yaron Meirovitch et al. 2026 (Lichtman lab).
https://www.nature.com/articles/s41593-026-02344-7 -
"These observations argue that both local intrajunctional and long-distance interjunctional synaptic competition are activity-mediated and that the structure of mature neural circuits arises from the activity patterns of developing circuits."
From: "Connectomic evidence that ordered activity drives neuromuscular network formation", Yaron Meirovitch et al. 2026 (Lichtman lab).
https://www.nature.com/articles/s41593-026-02344-7 -
"These observations argue that both local intrajunctional and long-distance interjunctional synaptic competition are activity-mediated and that the structure of mature neural circuits arises from the activity patterns of developing circuits."
From: "Connectomic evidence that ordered activity drives neuromuscular network formation", Yaron Meirovitch et al. 2026 (Lichtman lab).
https://www.nature.com/articles/s41593-026-02344-7 -
¿Sabías que todos estos descubrimientos en #neurociencias se hicieron en #Uruguay y usando #insectos ?
Did you know all these #neuroscience discoveries were made in Uruguay using #insects ?
Tal vez es hora de que leas el #preprint de la #revision en #accesoabierto que escribimos con @constanzasilvera
Maybe it's time for you to read the #openaccess #review that @constanzasilvera and I wrote at
#biology #biologia #ciencia #science #visualsystem #ultrastructure #vision #desarrollo #development #neuraldevelopment #latex
-
This is really exciting!
A long expected outome from my postdoc at Rafael Cantera's lab in #Uruguay in collaboration with Boris Egger in at @unifr is now at @biorxiv_devbioUsing David Morton's (OHSU) flies we found that hypoxia-driven guanylyl cyclases regulate brain size!
Atypical soluble guanylyl cyclases control brain size in Drosophila
https://www.biorxiv.org/content/10.1101/2024.07.17.603894v1
#Drosophila #neuroscience #development
@SocNeuroUy #iibce #neuraldevelopment #desarrollo #brain #neurociencia #insects #preprint @ohsunews @ladiaria @leo___lagos -
Today in likely controversial and potentially very high-impact studies in #Drosophila:
“Exposure to trans fat during the developmental period of Drosophila melanogaster alters the composition of fatty acids in the head and induces depression-like behavior”, by Luana Barreto Meichtry et al. 2023 https://pubmed.ncbi.nlm.nih.gov/36933760/
Found via: https://mathstodon.xyz/@flypapers@botsin.space/110048256472016606
#nutrition #depression #NeuralDevelopment -
Today in likely controversial and potentially very high-impact studies in #Drosophila:
“Exposure to trans fat during the developmental period of Drosophila melanogaster alters the composition of fatty acids in the head and induces depression-like behavior”, by Luana Barreto Meichtry et al. 2023 https://pubmed.ncbi.nlm.nih.gov/36933760/
Found via: https://mathstodon.xyz/@flypapers@botsin.space/110048256472016606
#nutrition #depression #NeuralDevelopment -
Today in likely controversial and potentially very high-impact studies in #Drosophila:
“Exposure to trans fat during the developmental period of Drosophila melanogaster alters the composition of fatty acids in the head and induces depression-like behavior”, by Luana Barreto Meichtry et al. 2023 https://pubmed.ncbi.nlm.nih.gov/36933760/
Found via: https://mathstodon.xyz/@flypapers@botsin.space/110048256472016606
#nutrition #depression #NeuralDevelopment -
Today in likely controversial and potentially very high-impact studies in #Drosophila:
“Exposure to trans fat during the developmental period of Drosophila melanogaster alters the composition of fatty acids in the head and induces depression-like behavior”, by Luana Barreto Meichtry et al. 2023 https://pubmed.ncbi.nlm.nih.gov/36933760/
Found via: https://mathstodon.xyz/@flypapers@botsin.space/110048256472016606
#nutrition #depression #NeuralDevelopment -
Today in likely controversial and potentially very high-impact studies in #Drosophila:
“Exposure to trans fat during the developmental period of Drosophila melanogaster alters the composition of fatty acids in the head and induces depression-like behavior”, by Luana Barreto Meichtry et al. 2023 https://pubmed.ncbi.nlm.nih.gov/36933760/
Found via: https://mathstodon.xyz/@flypapers@botsin.space/110048256472016606
#nutrition #depression #NeuralDevelopment -
I just discussed this with a friend - a paper well worth reading.
Atzil, Shir, et al. "Growing a social brain." Nature human behaviour 2.9 (2018): 624-636.
-
I just discussed this with a friend - a paper well worth reading.
Atzil, Shir, et al. "Growing a social brain." Nature human behaviour 2.9 (2018): 624-636.
-
I just discussed this with a friend - a paper well worth reading.
Atzil, Shir, et al. "Growing a social brain." Nature human behaviour 2.9 (2018): 624-636.
-
I just discussed this with a friend - a paper well worth reading.
Atzil, Shir, et al. "Growing a social brain." Nature human behaviour 2.9 (2018): 624-636.
-
I just discussed this with a friend - a paper well worth reading.
Atzil, Shir, et al. "Growing a social brain." Nature human behaviour 2.9 (2018): 624-636.
-
Very happy to share our new paper, showing that the ontogenetic trajectory of trabecular bone tracks neural development and life-history variation among humans and non-human primates. If applied to the fossil record, could lead to new ways to interpret the evolution of developmental trajectories of the brain. Great work by Jaap Saers, and coauthors Tim Ryan and Adam Gordon.
#humanevolution #biomechanics #locomotion #ontogeny #paleoanthropology #neuraldevelopment -
Very happy to share our new paper, showing that the ontogenetic trajectory of trabecular bone tracks neural development and life-history variation among humans and non-human primates. If applied to the fossil record, could lead to new ways to interpret the evolution of developmental trajectories of the brain. Great work by Jaap Saers, and coauthors Tim Ryan and Adam Gordon.
#humanevolution #biomechanics #locomotion #ontogeny #paleoanthropology #neuraldevelopment -
Very happy to share our new paper, showing that the ontogenetic trajectory of trabecular bone tracks neural development and life-history variation among humans and non-human primates. If applied to the fossil record, could lead to new ways to interpret the evolution of developmental trajectories of the brain. Great work by Jaap Saers, and coauthors Tim Ryan and Adam Gordon.
#humanevolution #biomechanics #locomotion #ontogeny #paleoanthropology #neuraldevelopment