Environment factors important than genetic in autism

Study of twins suggests genetic component of autism spectrum disorders may be moderate — Environmental component may be substantial – Shared environmental factors ? experiences and exposures common to both twin individuals ? accounted for 55% of strict autism and 58% of more broadly defined autism spectrum disorders (ASD), revealed by researchers. Genetic heritability accounted for 37% of autism and 38% of ASD.

Autism linked to hundreds of genetic changes

Yale researchers discover many genetic keys needed to unlock autism – Investigating 1,000 families reveals hundreds of small genetic variations are associated with autism spectrum disorders, according to a multi-site collaborative study led by researchers at Yale University. These genetic findings can be used to begin unraveling the underlying biology of autism.

EEG can diagnose autism spectrum disorders in infants

Using EEGs to diagnose autism spectrum disorders in infants — Machine-learning system finds differences in brain connectivity – A computational physicist and a cognitive neuroscientist at Children’s Hospital Boston have come up with the beginnings of a noninvasive test to evaluate an infant’s autism risk.

New drug improves symptoms in autism disorder

Mount Sinai identifies first drug to demonstrate therapeutic effect in a type of autism – Researchers from Mount Sinai School of Medicine have identified a drug that improves communication between nerve cells in a mouse model of Phelan McDermid Syndrome (PMS). Behavioral symptoms of PMS fall under the autism spectrum disorder category.

Autism’s earliest symptoms not in infants under 6 months

Autism’s earliest symptoms not evident in children under 6 months — Condition is characterized by a slow decline rather than an abrupt loss of skills, study says – A study of the development of autism in infants, comparing the behavior of the siblings of children diagnosed with autism to that of babies developing normally, has found that the nascent symptoms of the condition – a lack of shared eye contact, smiling and communicative babbling – are not present at 6 months, but emerge gradually and only become apparent during the latter part of the first year of life.

Educated parents may have autistic children

UC Davis researchers identify autism clusters in California — Clusters are associated with areas of greater parental education – Researchers at UC Davis have identified 10 locations in California where the incidence of autism is higher than surrounding areas in the same region. Most of the areas, or clusters, are in locations where parents have higher-than-average levels of educational attainment.

Autism tied to genes that influence brain cell connections

World’s largest DNA scan for autism uncovers new gene variant for disorder. Risk of autism tied to genes that influence brain cell connections. – Researchers have identified a new gene variant that is highly common in autistic children. Gene, known as CDH10, is most active in key regions that support language, speech and interpreting social behavior.

Autism linked to being firstborn, breech births or older moms

Autism may be linked to being firstborn, breech births or moms 35 or older. Study looked at group of Utah 8-year-olds. – Children who are firstborn or breech or whose mothers are 35 or older when giving birth are at significantly greater risk for developing an autism spectrum disorder, University of Utah School of Medicine researchers have reported in a new study with Utah children.

Autism spectrum disorder linked to preterm birth

New study explores the relationship between preterm birth and autism spectrum disorder. – Researchers from Boston University School of Medicine (BUSM) and Boston Medical Center (BMC), in collaboration with other medical centers, have found that children born more than three months premature, are at three times the risk for screening positive on the modified checklist for autism in toddlers (M-CHAT).

Chromosomal abnormalities play substantial role in autism

Chromosomal abnormalities play substantial role in autism, revealed in a study. Noting this change would help early diagnosis for autism or autism spectrum disorder (ASD) – a kind of developmental disorder. – Genome-wide scans of families affected by autism spectrum disorder (ASD) have revealed new evidence that previously unknown chromosomal abnormalities have a substantial role in the prevalent developmental disorder, according to a report published online Jan. 17th in the American Journal of Human Genetics, a publication of Cell Press.

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