Genetics may play a smaller role in shaping personality than many people assume. New research suggests that life experiences, environment, and social influences account for much more of the variation in personality traits than DNA alone.

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#Genetics #Personality #LifeExperience

🧬 The largest study to date has identified over 1,000 genetic variants linked to the Big Five personality traits (extraversion, agreeableness, conscientiousness, neuroticism, and openness).

🧬 This research, involving 1.14 million people and published in Nature, found that genetics explains a modest portion (7.4-10.6%) of personality differences between individuals, and less than 4% of variation can be predicted from genetic data alone.

🧬 While genetics influences personality predispositions, environmental factors play a substantial role, explaining the majority of individual differences. The study found genetic effects on personality within families mirrored those between unrelated people.

🧬 The genetic patterns for "agreeableness" showed variation across different groups, potentially due to cultural differences in how the trait is expressed or measured.

#Genetics #Personality #BigFive

👶 New study suggests cerebral palsy might not be a single genetic disorder, but a collection of symptoms overlapping with other conditions.

🔬 Researchers reviewed 21 genetic studies and identified 515 potentially causal genes for cerebral palsy. Only 89 had sufficient statistical evidence.

🧬 In a separate analysis of 460 children with cerebral palsy, pathogenic variants were found in 60 genes, but only 16 showed significant evidence of association.

💡 The findings, published in the American Journal of Human Genetics, could improve the interpretation of genetic testing and lead to more precise patient care.

#CerebralPalsy #Genetics #MedicalResearch

Huge genetic study finds strong links between DNA and personality traits

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#Genetics #PersonalityTraits #DNAResearch

✨ A massive study involving 1.14 million people from 13 countries has identified 1,260 genetic markers linked to the "Big Five" personality traits (extraversion, agreeableness, conscientiousness, neuroticism, and openness to experience), with 824 markers identified for the first time.

🧠 These genetic markers are strongly associated with genes active in the prefrontal cortex, the brain region often called the "personality centre," which is crucial for emotional regulation and decision-making.

❤️ The study found that genetics explains 5-16% of personality variation and revealed genetic links between personality traits and health outcomes, such as extraversion increasing COVID infection risk and conscientiousness reducing body-mass index.

#Genetics #Personality #Science

Children with a higher polygenic index for ADHD tend to see a higher likelihood of their parents separating or divorcing. The findings suggest that families are dynamic systems where a child’s inherited characteristics can actively shape the life trajectories of their parents.

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#ADHD #Genetics #FamilyDynamics

📈 Children with a higher genetic likelihood of ADHD are linked to increased parental separation or divorce, suggesting children's inherited traits can influence family dynamics.

🔬 A one standard deviation increase in a child's ADHD polygenic index predicted a 7% relative increase in the odds of parental separation or divorce.

👧 This association was stronger in families with daughters, with an 11% increase in parental dissolution odds for each standard deviation increase in the ADHD polygenic index.

👨‍👩‍👧‍👦 In families with above-average educational attainment, a child's ADHD genetic risk was linked to a 15% rise in partnership dissolution odds.

#ADHDResearch #FamilyDynamics #Genetics

Large genetic study links GLP-1 receptor activation to improved mental well-being

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#Genetics #MentalHealth #GLP1R

🚬 New research published in Science suggests an inherited genetic mutation, specifically in the EGFR gene, could explain some cases of lung cancer in non-smokers.

🔬 The EGFR T790M mutation, found in about 1 in 15,000 people in the U.S., increases the risk of lung cancer by 25-fold for carriers, and 60-fold for non-smokers compared to non-carriers.

🧬 This discovery opens doors for genetic testing and personalized lung cancer screening for individuals with this mutation, potentially leading to earlier detection and better treatment outcomes, similar to BRCA testing for breast cancer.

#LungCancer #Genetics #HealthTech

Genetics may influence how people respond to some traumatic experiences more than others, particularly in childhood, data from 144,000 people in the UK suggest

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#Genetics #TraumaRecovery #ChildhoodImpact

* 🧬 New study from King’s College London suggests genes can increase vulnerability to PTSD, especially from childhood neglect. Research published today in the European Journal of Psychotraumatology highlights how your genes and life experiences combine to affect PTSD risk.

* 🧠 The research analyzed mental health and genetic data from over 144,000 individuals, examining childhood and adulthood traumas. Findings indicate childhood traumas have a stronger link to PTSD symptoms and gene interactions than adult traumas.

* 🔬 A gene called FAM1120A, involved in processing fear, showed a strong interaction with childhood emotional neglect, more so than other studied traumas. This research could lead to early screening for those most at risk of PTSD.

#PTSD #Genetics #MentalHealth

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🧠 Researchers discovered fragments of a human gene, BC200, found within the molluscum contagiosum virus that infects skin.

🔬 These BC200-derived sequences, originating from mobile DNA, have a history of self-copying and inserting into new locations, including this unusual jump across the human-virus boundary.

🌍 The study, published in Science, suggests this genetic movement has occurred throughout primate evolution and may contribute to differences in human genomes.

🧬 While BC200 is active in brain cells and helps regulate protein production, its exact function within the virus is still unknown, and the virus does not appear to have gained brain functions.

#Genetics #ScienceNews #DNA

Gene link to inherited blindness discovered

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#Genetics #InheritedBlindness #GeneDiscovery

💡 Researchers have discovered that faults in the IDUA gene, previously linked to a severe childhood metabolic illness, can also cause a milder form of inherited blindness in adults.

🔬 The study, co-led by scientists from the University of Manchester, found that specific combinations of faults in the IDUA gene can lead to retinitis pigmentosa, with patients showing no signs of the classic, severe metabolic disorder.

🧬 This discovery broadens the understanding of MPS I, revealing it can exist in a much milder form, with residual gene function as low as 0.5-2% potentially protecting organs while leaving the retina vulnerable.

#Genetics #Blindness #MedicalResearch

🧬 A new study published in Behavior Genetics reveals genetic signatures of "assortative mating" (people choosing partners with similar traits) across generations in the UK and US.

📚 Genetic signatures for education and smoking similarity between partners have grown stronger in more recently born Americans compared to those born earlier in the 20th century.

🧬 The research, led by Gretchen R. B. Saunders of the University of Minnesota, analyzed genetic data from the UK Biobank and the All of Us Research Program, finding that educational attainment showed the highest spousal correlation (0.45) followed by weekly alcohol consumption (0.42).

👥 While partners resemble each other in observable traits and genetic scores, some of the gap is attributed to shared environments and mutual influence over time, not just direct genetic selection.

#Genetics #AssortativeMating #BehaviorGenetics

A new study reveals that autism in boys and girls is genetically highly similar, whereas early- and late-diagnosed autism show distinctly different genetic profiles and associations with other behavioral and cognitive traits.

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#AutismResearch #Genetics #NeurodevelopmentalTraits

🔵 Autism Diagnosis: Early vs. Late A new study in Behavior Genetics suggests the genetic factors behind early-diagnosed autism are linked to educational and cognitive traits, independent of biological sex. This means boys diagnosed early have distinct genetic markers not solely tied to being male.

🔵 Genetic Links Unclear for Late Diagnosis For autism diagnosed later in life (age 10+), the connection to conditions like depression is still being explored. Researchers couldn't determine if these links are due to the timing of the diagnosis or biological sex, as the genetic signal for late-diagnosed autism was highly similar to both male (0.99 correlation) and female (0.91 correlation) autism.

🔵 Distinct Genetic Pathways Emerge While male and female autism share high genetic similarity (0.81 correlation), early and late-diagnosed autism show less overlap (0.42 correlation). Early diagnosis is linked to educational attainment and cognitive tasks, while late diagnosis correlates with higher psychiatric burden, including depression and PTSD, and adverse social outcomes.

🔵 Sex Doesn't Fully Explain Early Diagnosis Adjusting for biological sex strengthened the unique genetic associations of early-diagnosed autism, indicating these are not simply a result of more boys being diagnosed early. However, the study also noted that a tendency towards speeding was negatively associated with female autism, and anorexia nervosa had a stronger genetic overlap with female autism.

#AutismResearch #Genetics #Neuroscience

A study of over 12,000 Norwegian families found that by age eight, a child’s ADHD traits come mainly from their own genes, not from how their parents’ genes shape the home. Researchers found no firm evidence that parenting style or the home environment tied to parents’ DNA drives ADHD in their kids.

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#ADHD #Genetics #Pediatrics

* 🧬 A major study of 12,374 family trios found that by age eight, a child's own genetics are the primary driver of ADHD traits, with no significant evidence of indirect genetic influence from parents' genes.

* 👶 At age five, the research found no robust evidence for either direct or indirect genetic effects on ADHD traits, possibly because these traits may not be fully measurable at such an early age.

* 🔬 While the study suggests a child's own DNA is key for ADHD by mid-childhood, researchers caution that statistical limitations might have obscured more subtle indirect genetic influences.

#ADHD #Genetics #ChildDevelopment

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✅ Researchers have identified distinct genetic pathways for anxiety in men and women, explaining why they experience it differently. Females are diagnosed at twice the rate of males and often show internalizing symptoms, while males tend to externalize behaviors.

✅ Analyzing data from 455,487 individuals, the study found 21 anxiety-related genetic variants in females and 5 in males, with only one overlap. This suggests men have a higher threshold for developing anxiety, requiring more genetic and environmental factors.

✅ In females, genetic anxiety links are tied to chromatin regulation and smell processing, which can impact stress sensitivity. For males, the links involve lipoprotein metabolism, crucial for the body's fight-or-flight energy response.

✅ Female anxiety genetic risk correlates with ADHD and higher BMI. Male anxiety risk is more associated with central body fat distribution, specifically waist-to-hip ratio.

#AnxietyResearch #Genetics #MentalHealth