Tag: twins

May 2014
News

Environment, genetics may contribute equally to autism risk

by  /  22 May 2014

A large study of autism in Swedish families suggests that about half of the risk for autism comes from genetics and the other half from environmental factors, researchers reported 7 May in The Journal of the American Medical Association. However, the mathematical model the study used may not be appropriate for evaluating autism risk, experts say.

19 Comments
Opinion

Twin study set to explore autism, attention deficit overlap

by  /  16 May 2014

A Swedish twin study plans to search for the shared genetic and environmental origins of autism and attention deficit hyperactivity disorder, which are often mistaken for each other.

4 Comments
March 2014
Opinion / Cross Talk

Are girls really protected from autism?

by  /  31 March 2014

Do genetic differences or diagnostic biases account for the gender imbalance in autism? Catherine Lord, David Skuse and Angelica Ronald weigh in.

1 Comment
News

Genes maintain stability of autism traits over time

by  /  3 March 2014

Traits that typically accompany autism, such as social impairments and communication difficulties, remain largely consistent as children age, and this stability is primarily due to genetic factors, a new study concludes. The research, published in the March issue of the Journal of the American Academy of Child & Adolescent Psychiatry, is based on more than 6,000 twin pairs in the general population.

3 Comments
December 2013
Opinion

Anxiety, autism may share common basis

by  /  6 December 2013

Anxiety runs in families with a history of autism, hinting that the two conditions may share a common origin, suggests a twin study published in November.

5 Comments
September 2013
News

Sibling study highlights autism’s genetic roots

by  /  12 September 2013

Children who have older siblings with autism are seven times more likely than those in the general population to receive autism diagnoses themselves, according to a large Danish study published 19 August in JAMA Pediatrics.

15 Comments
August 2013
News

Genetics: Methyl groups on DNA modify Rett symptoms

by  /  20 August 2013

Methylation — modifications to DNA that regulate gene expression — may explain why identical twins with the same Rett syndrome mutation have different symptoms, according to a study published 21 June in PLoS One.

0 Comments
July 2013
Multimedia / Webinars

Francesca Happe presents ‘fractionated triad’ model

24 July 2013

Watch the complete replay of Francesca Happé discussing how autism’s constellation of symptoms may have independent biological causes. Submit your own follow-up questions.

10 Comments
News / Toolbox

Genetics algorithm reveals mosaic mutations

by  /  10 July 2013

A new software tool detects chromosomal alterations present in only a subset of cells in the body. This method, described 31 May in BMC Genomics, may help reveal mosaicism’s contribution to neurological disorders.

0 Comments
May 2013
News

Twin study finds epigenetic imprint of autism traits

by  /  16 May 2013

Epigenetics, or the chemical markings on DNA that affect gene expression, plays a role in some cases of autism, according to a study of 50 identical twins published 23 April in Molecular Psychiatry.

6 Comments