This two-site study, based at New York State Psychiatric Institute (NYPSI, the site of this CCNMD) and Western Psychiatric Institute and Clinic examine the familial transmission of early-onset suicidal behavior. The probands are adult depressed suicide attempters and depressed non- attempters well-characterized in previously interrelated studies in New York and Pittsburgh. In New York, 350 offspring of 90 attempters and 70 non-attempters and in Pittsburgh, approximately 160 offspring of 35 attempters and 25 non-attempters will be studied. Because clinical and demographic characteristics of the probands in New York and Pittsburgh are similar, it is likely that the data can be pooled across sites. Probands, biological offspring over the age of 10, and the other biological parent will be characterized as to Axis I and II disorder, suicide attempt history, aggression, impulsivity, and family environment. Probands will be genotyped with polymorphic markers for tryptophan hydroxylase and other candidate genes, mostly related to central serotonergic metabolism. After the initial assessment, offspring will be followed up at one and two years after intake to observe the development of aggression., impulsivity, psychopathology, and suicidal behavior. We predict that the confluence of aggression and impulsivity, psychopathology, and suicidal behavior. We predict that the confluence of aggression and impulsivity, """"""""impulsive aggression"""""""", the tendency to impulsively respond to provocation or frustration with anger or overt aggression, is central to the familial transmission of suicidal behavior. The project will test the following hypotheses: (1) offspring of attempters will have higher rates of suicide attempts than the offspring of non-attempters; (2) aggression, impulsivity, and the dimension of impulsive aggression will be greater in offspring of attempters, and will predict development of suicide attempts, especially in those who also develop mood disorders; (3) the familial transmission of suicide attempts will not be explained by the familial transmission of mood disorder alone; (4) there will be evidence of familial transmission of the suicide attempt even after controlling for the expected greater exposure to family adversity in the offspring of attempters; and (5) polymorphisms of the tryptophan hydroxylase gene and other genes related to central serotonergic function will be associated with impulsive aggression and suicide attempts among probands.

Agency
National Institute of Health (NIH)
Institute
National Institute of Mental Health (NIMH)
Type
Specialized Center (P50)
Project #
1P50MH062185-01
Application #
6339872
Study Section
Special Emphasis Panel (ZMH1-BRB-P (03))
Project Start
2000-07-03
Project End
2005-06-30
Budget Start
2000-07-03
Budget End
2001-06-30
Support Year
1
Fiscal Year
2000
Total Cost
$14,811
Indirect Cost
Name
New York State Psychiatric Institute
Department
Type
DUNS #
167204994
City
New York
State
NY
Country
United States
Zip Code
10032
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