Researchers found polymorphisms in PSMB4 and TBX21 genes linked to major depression susceptibility and treatment response. Genetic variations may also be relevant to psoriasis and asthma, highlighting the complex interplay between inflammation and mental health.
A study has found a possible connection between long-term marijuana use and an increased risk of heart attacks and strokes. Heavy marijuana users showed significant increases in apolipoprotein C-III levels, which may be related to the delayed breakdown of triglycerides.
A new NIH study identifies high incidence rates of substance use disorders and major mood and anxiety disorders in the US population. The study found that age is a critical general risk factor for first onset DSM-IV substance use, mood, and anxiety disorders.
Researchers used laser micro-dissection to study gene expression in the human hypothalamus, a region crucial for stress response and depression development. The study found significant changes in five genes involved in corticotrophin-releasing factor activation, which may lead to new therapeutic strategies.
Researchers investigated how inheriting different combinations of gene variants impact depression risk in normal subjects. They found that the SLC6A4 serotonin transporter gene interacts with the BDNF gene to regulate emotion regulation system development, revealing individual genes are not isolated risks.
Researchers have created a new mouse model of mania, allowing them to study the complex interactions between genetic and environmental factors contributing to bipolar disorder. The study found that mice missing the GluR6 gene exhibited symptoms of mania, including increased activity, reduced anxiety, and aggressive behavior.
A new approach identifies five genes involved in myelination and six genes involved in growth factor signaling as potential biomarkers for high and low mood states. The study suggests that blood biomarkers may offer an informative window into brain functioning and disease state.
A genetic study of 14,000 people found two genes, alpha 3 and alpha 5 nicotinic receptor subunits, to be associated with an increased risk of heavy smoking. The implicated DNA variants can be used to predict ability to quit using existing medications, potentially leading to more efficient treatment.
A study found that genes involved in neurovascular function, regulated by hypoxia, and interacted with serious obstetric complications to boost schizophrenia risk. The study used a family-based design and identified four significant gene-environment interactions.
Researchers have found that genetic variations in the GABRA6 gene contribute to individual differences in stress response. The study suggests a link between this gene polymorphism and an attenuated stress response.
Researchers found thimerosal exposure in mice led to autism-like behaviors, including abnormal responses to environments and brain abnormalities. The study suggests a potential connection between genetic susceptibility and environmental triggers for autism, highlighting the need for further research and intervention strategies.
Researchers found that exposure to thimerosal, a vaccine preservative, can interrupt growth factor signaling and cause adverse effects on methylation reactions. This can lead to disorders such as autism and ADHD in infants and children.
A study found that NS temperament in adulthood was predicted by an interaction between the DRD4 gene polymorphism and a hostile childhood rearing environment. Participants with certain genetic variants and adverse childhood experiences had a higher risk of exhibiting high novelty seeking scores.
Researchers discovered that stress can alter gene expression, leading to enhanced fear memory and long-term potentiation. By using a new gene-based 'antisense' drug, they successfully prevented these changes, attenuating the elevated freezing response and paving the way for novel treatments.
A genome-wide investigation found that reading ability in individuals with ADHD shares common genetic variants with the condition, but also has distinct genetic underpinnings. The study identified four chromosomal regions associated with reading ability, overlapping previously identified areas for ADHD and reading disorder.
A recent genetic study found a strong association between the dopamine receptor D1 gene and attention-deficit/hyperactivity disorder (ADHD). The study suggests that this gene variant may increase the risk of developing inattentive symptoms of ADHD. Further research is needed to confirm these findings, but the discovery provides new ins...
Research suggests that high levels of estrogen can enhance the stress response, leading to greater stress-related cognitive impairments in females. This disparity is consistent with reports of higher prevalence of stress-related disorders in women, particularly during child-bearing years.
A new study explores the potential of erythropoietin (EPO) as a neuroprotective agent for schizophrenia. EPO was found to penetrate the blood-brain barrier and enhance cognitive functioning in patients with schizophrenia. The results suggest that EPO may be a promising compound for preventing loss of brain function in this disease.
A recent study published in Molecular Psychiatry reveals that cell death promotes learning and growth in the brain. The research found that rats with lower levels of cell death performed better in spatial learning tasks, suggesting a positive correlation between cell death and cognitive function.
A new genetic variant has been identified in individuals with obsessive-compulsive disorder (OCD), showing a strong link to the development of the condition in multiple generations. The I425V mutation affects serotonin transporter function and is rare, found in only 7 out of 833 individuals studied.
A study published in Molecular Psychiatry found that a specific gene variant, M129V, affecting the prion protein is associated with changes in cognitive performance. Researchers discovered this link while investigating genetic influences on mental health disorders, also noting a connection to mad cow disease.
Researchers identify key genes and cellular pathways contributing to schizophrenia, providing new insights into the disorder's complex biology. The study's findings hold promise for developing novel therapeutic strategies.
A study published in Molecular Psychiatry has identified a sex-specific gene variant associated with an increased risk of developing severe depression in women. Over 80% of women who inherited the CREB1 variant developed depressive disorders, highlighting the importance of considering sex-specific factors in depression research.
Research supports the hypothesis that mesocortical dopamine function is impaired in schizophrenia, with decreased D2/3 receptor density associated with negative and general psychopathological symptoms. Age was also negatively correlated with D2/3 receptor density among controls.
Researchers found two genes, HTR1D and OPRD1, associated with anorexia nervosa in the 1p33-36 linkage region. These genes regulate behaviors including eating and anxiety, and individuals carrying specific alleles for developing anorexia nervosa are at increased risk.
Researchers found a significant association between the DQB1_05 and _04 alleles and sleepwalking disorder, suggesting that these genes play a role in disorders of motor control during sleep. The study identified Ser74 as a key genetic marker for sleepwalking, providing new insights into its underlying mechanisms.
A genetic study found a new gene variant associated with general intelligence, located within the cathepsin D (CTSD) gene. The study, which followed 767 healthy adults over 15 years, discovered that a specific functional transition in exon 2 of CTSD increased cognitive decline.
Researchers investigated a repeat polymorphism in the estrogen receptor alpha gene and found associations with neuroticism, psychoticism, and non-conformity. The study suggests that genetic variations in this gene may contribute to specific components of personality.
Research suggests that the mammalian ventral tegmental area plays a critical role in mediating both rewarding and aversive properties of nicotine. Blockade of mesolimbic dopamine signaling induced by neuroleptic medications may selectively block the aversive effects of nicotine, increasing vulnerability to its addictive properties.
Researchers found no significant differences in TPH protein level or 5HT2A receptor density between suicide victims and controls. The A218C polymorphism of the TPH gene was shown to alter TPH protein level, suggesting its role in serotonergic function rather than biological suicidality.
A multicenter study identified a positive association between obsessive-compulsive disorder (OCD) and a serotonergic receptor gene variant. This genetic phenotype may represent an early onset risk factor for the disorder, suggesting age of onset should be considered in molecular genetic studies.
A study found a common genetic link between depression and cardiovascular disease, with increased frequency of specific gene variants in patients with severe depression. The combined presence of ACE-D and G-ß3-T alleles was associated with an elevated risk of cardiovascular disorders and depression.
Researchers have identified a genetic basis for aggression and anger, with the vasopressin 1b receptor playing a key role. The study found that mice without this receptor exhibit reduced aggression and impaired social recognition, suggesting potential therapeutic targets for treating aggressive behavior.
Researchers have discovered a new structure in the human brain linked to learning and memory, called the marginal division (MrD). This pan-shaped structure, composed of spindle-shaped neurons, plays a key role in linking other memory-related structures.
Researchers found that depression is influenced by additive genetic effects on temperament dimensions, which interact with individual environmental experiences. People predisposed to harm avoidance or high reward dependence are more likely to develop depression.
Researchers found a common mutation in the DAT gene to be associated with trauma survivors who developed chronic PTSD, suggesting a genetic contribution to the disorder's development. The study implies that genetically determined variation in dopaminergic neurotransmission may play a role in shaping the pathological response to trauma.
A study found increased transmission of SNAP-25/DdeI variant in Irish ADHD trios, suggesting a genetic link between the SNAP gene and attention deficit hyperactivity disorder. Further research is needed to confirm these findings and explore the potential of SNAP gene variants as biomarkers for diagnosis and treatment.
A study has identified genetic markers that can help guide clinical trials for anti-Alzheimer drugs, potentially leading to the development of a more manageable pool of individuals at high risk. These markers may allow researchers to winnow down the general population and focus on those with relatively higher risk for Alzheimer's disease.
A study published in Molecular Psychiatry found a link between a genetic variant of the serotonin receptor gene and obsessive-compulsive disorder. The research suggests that individuals with this variant may be more susceptible to developing OCD, potentially leading to earlier identification and treatment.
A genetic study in Palau reveals distinct genetic factors contributing to schizophrenia in each of five families. The findings reinforce the complexity of schizophrenia and demonstrate the value of large extended pedigrees for gene mapping.
Research suggests BDNF and NMDA receptor subunits are reduced in rats with early maternal deprivation, leading to changes in hippocampus function. This study provides evidence for the presence of molecular changes in the brain following exposure to stressful conditions during development.
A study published in Molecular Psychiatry found a genetic link between the NET protein, which regulates norepinephrine levels, and an increased risk of restrictive anorexia nervosa. The discovery could lead to new treatments for this devastating illness, which has the highest death rate among psychiatric disorders.
A study published in Molecular Psychiatry found that specific genetic markers on chromosome 2 are associated with severe depression in women, but not in men. This discovery suggests important differences in the molecular basis of clinical depression between sexes, which may contribute to varying treatment responses and symptoms.
A study found that certain alleles or genotypes of the CNR1 gene may confer a susceptibility to schizophrenia, especially of the hebephrenic type. The presence of specific polymorphisms in the CNR1 gene was significantly associated with an increased risk of developing schizophrenia.
Researchers have discovered abnormal immune regulation and autoimmunity in children with a form of autism characterized by sudden regression. The study reveals distinct autoimmune features in the epithelium of the small bowel, which may contribute to bowel symptoms and cognitive regression in autistic children.
Studies reveal connections between the serotonin transporter gene SLC6A4 and autism, as well as a potential link between the glutamate receptor 6 (GluR6) gene and the syndrome. The findings contribute to a deeper understanding of the genetic underpinnings of autism.
A genetic study found that a polymorphism in the serotonin transporter promoter region is associated with mood response during tryptophan depletion, indicating a potential link between diet and depression relapse. The study suggests that individual genetic differences may influence the impact of dietary changes on depressive symptoms.
A functional polymorphism within the m-opioid receptor gene has been linked to an increased risk of substance abuse, including alcohol and other substances. The study found that individuals with this genetic variation were more likely to develop addiction and engage in risky behavior.
A multicentric study has identified an excess of allele1 for the GABRA3 gene in patients with bipolar disorder. This finding suggests a potential link between genetic variations and the development of manic-depressive illness.
Researchers found a genetic association between IL-1 receptor antagonist and ADHD, suggesting immune system involvement in childhood susceptibility. The study suggests that altered IL-1 activity may contribute to ADHD's dopaminergic reactivity.