title: Platelet dense granule secretion and aggregation in adolescents with conduct disorder: effects of marijuana use.
abstract: BACKGROUND
  We had previously reported a decrease in agonist-induced platelet dense granule secretion in blood samples from male adolescents with and without Conduct Disorder (CD). In an augmented sample, we have now employed multivariate modeling to examine the simultaneous effects of CD and regular monthly alcohol and marijuana use on both the dense granule secretion and aggregation phases of agonist-induced platelet responses.
  
  
  METHODS
  Blood samples were obtained from adolescents with and without a CD diagnosis. Platelet dense granule secretion and aggregation responses to a variety of agonists were examined in the laboratory.
  
  
  RESULTS
  Significant multivariate interactions of CD status with regular marijuana use were found for responses to collagen, ADP alone, and ADP plus 0.2 microgram. of serotonin. Responses in platelets from youth with CD, but without regular marijuana use differed from other subjects. Multivariate main effects of marijuana use alone on platelet responses to arachidonic acid and ADP plus 1.0 microgram. of serotonin were found. No effects of alcohol use were found.
  
  
  CONCLUSIONS
  The results demonstrate an interaction between CD and the effects of chronic marijuana use for several agonists in this platelet model system, and further support the possibility of a variation in signal transduction mechanisms in CD.
authors.affiliation: Western Psychiatric Institute and Clinic, University of Pittsburgh School of Medicine, Pennsylvania, USA.
authors.forename: H B
authors.initials: HB
authors.lastname: Moss
authors.forename: J K
authors.initials: JK
authors.lastname: Yao
authors.forename: K
authors.initials: K
authors.lastname: Lynch
mesh_terms: D000244:Adenosine Diphosphate / Q000502:physiology; D000293:Adolescent; D000437:Alcoholism / Q000097:blood* / Q000175:diagnosis; D002450:Cell Communication / Q000502:physiology; D002452:Cell Count; D002908:Chronic Disease; D019955:Conduct Disorder / Q000097:blood* / Q000175:diagnosis; D003594:Cytoplasmic Granules / Q000502:physiology*; D006801:Humans; D008297:Male; D002189:Marijuana Abuse / Q000097:blood* / Q000175:diagnosis; D010974:Platelet Aggregation / Q000502:physiology*; D011569:Psychiatric Status Rating Scales; D012701:Serotonin / Q000502:physiology; D015398:Signal Transduction / Q000502:physiology; D013928:Thromboxane A2 / Q000502:physiology
chemical_list: D012701:Serotonin; D013928:Thromboxane A2; D000244:Adenosine Diphosphate