Format

Send to

Choose Destination
See comment in PubMed Commons below
Compr Psychiatry. 2001 Mar-Apr;42(2):105-10.

Genetic studies of seasonal affective disorder and seasonality.

Author information

1
Section on Biological Rhythms, National Institute of Mental Health, Bethesda, MD, USA.

Abstract

Genetic studies of seasonal affective disorder (SAD) and seasonality have received considerable attention over the past several years. Studies of the prevalence of SAD and nonseasonal mood disorders among relatives of patients with SAD suggested a familial contribution to the development of SAD. Two twin studies demonstrated a substantial role of genetic variation in seasonality. Two genetic variants related to serotonergic transmission, the 5-HTTLPR and the 5-HT(2A)-1438G/A gene promoter polymorphisms, have been found to be associated with SAD. 5-HTTLPR is also associated with seasonality in SAD patients and in the general population. It is not clear whether SAD is inherited as a distinct entity or whether seasonality and depression are separate heritable traits that happen to coincide in certain individuals. Vulnerability to SAD and disease pathology may be influenced by many genes, perhaps on several chromosomes.

PMID:
11244145
DOI:
10.1053/comp.2001.21217
[Indexed for MEDLINE]
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Elsevier Science
    Loading ...
    Support Center