TY - JOUR
T1 - Higher expression of serotonin 5-HT2A receptors in the postmortem brains of teenage suicide victims
AU - Pandey, Ghanshyam N.
AU - Dwivedi, Yogesh
AU - Rizavi, Hooriyah S.
AU - Ren, Xinguo
AU - Pandey, Subhash C.
AU - Pesold, Christine
AU - Roberts, Rosalinda C.
AU - Conley, Robert R.
AU - Tamminga, Carol A.
PY - 2002
Y1 - 2002
N2 - Objective: Abnormalities of serotonin (5-HT) receptor subtypes have been observed in the postmortem brains of adult suicide victims; however, their role in teenage suicide is unexplored. The authors examined whether 5-HT2A receptor subtypes are altered in the postmortem brains of teenage suicide victims. Method: Levels of 5-HT2A receptors were determined through examination of [125I] LSD binding, protein expression (by use of Western blotting with a specific 5-HT2A receptor antibody), and mRNA (by means of quantitative reverse transcription polymerase chain reaction) in the prefrontal cortex, hippocampus, and nucleus accumbens of 15 teenage suicide victims and 15 normal matched teenage subjects. The cellular localization of the 5-HT2A receptors was determined by means of gold immunolabeling. Results: The authors observed significantly higher [125I]LSD binding in the prefrontal cortex and greater protein expression and mRNA levels in the prefrontal cortex and hippocampus but not in the nucleus accumbens of suicide victims, compared with normal subjects. Greater protein expression was localized on pyramidal cells in cortical layer V but not in other cortical layers or in the surrounding neuropil of the prefrontal cortex of teenage suicide victims. Conclusions: The evidence indicates higher levels of 5-HT2A receptor, protein, and mRNA expression in the prefrontal cortex and hippocampus, which have been implicated in emotion, stress, and cognition. There was no higher level in the nucleus accumbens, which has been implicated in drug dependence and craving. Our findings suggest that a higher level of 5-HT2Areceptors may be one of the neurobiological abnormalities associated with teenage suicide.
AB - Objective: Abnormalities of serotonin (5-HT) receptor subtypes have been observed in the postmortem brains of adult suicide victims; however, their role in teenage suicide is unexplored. The authors examined whether 5-HT2A receptor subtypes are altered in the postmortem brains of teenage suicide victims. Method: Levels of 5-HT2A receptors were determined through examination of [125I] LSD binding, protein expression (by use of Western blotting with a specific 5-HT2A receptor antibody), and mRNA (by means of quantitative reverse transcription polymerase chain reaction) in the prefrontal cortex, hippocampus, and nucleus accumbens of 15 teenage suicide victims and 15 normal matched teenage subjects. The cellular localization of the 5-HT2A receptors was determined by means of gold immunolabeling. Results: The authors observed significantly higher [125I]LSD binding in the prefrontal cortex and greater protein expression and mRNA levels in the prefrontal cortex and hippocampus but not in the nucleus accumbens of suicide victims, compared with normal subjects. Greater protein expression was localized on pyramidal cells in cortical layer V but not in other cortical layers or in the surrounding neuropil of the prefrontal cortex of teenage suicide victims. Conclusions: The evidence indicates higher levels of 5-HT2A receptor, protein, and mRNA expression in the prefrontal cortex and hippocampus, which have been implicated in emotion, stress, and cognition. There was no higher level in the nucleus accumbens, which has been implicated in drug dependence and craving. Our findings suggest that a higher level of 5-HT2Areceptors may be one of the neurobiological abnormalities associated with teenage suicide.
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U2 - 10.1176/appi.ajp.159.3.419
DO - 10.1176/appi.ajp.159.3.419
M3 - Article
C2 - 11870006
AN - SCOPUS:0036187895
SN - 0002-953X
VL - 159
SP - 419
EP - 429
JO - American Journal of Psychiatry
JF - American Journal of Psychiatry
IS - 3
ER -