Elucidating biological risk factors in suicide: role of protein kinase A.
Suicide is a major public health concern. Although there have been several studies of suicidal behavior that focused on the roles of psychosocial and sociocultural factors, these factors are of too little predictive value to be clinically useful. Therefore, research on the biological perspective of suicide has gained a stronghold and appears to provide a promising approach to identify biological risk factors associated with suicidal behavior. Recent studies demonstrate that an alteration in synaptic and structural plasticity is key to affective illnesses and suicide. Signal transduction molecules play an important role in such plastic events. Protein kinase A (PKA) is a crucial enzyme in the adenylyl cyclase signal transduction pathway and is involved in regulating gene transcription, cell survival, and plasticity. In this review, we critically and comprehensively discuss the role of PKA in suicidal behavior. Because stress is an important component of suicide, we also discuss whether stress affects PKA and how this may be associated with suicidal behavior. In addition, we also discuss the functional significance of the findings regarding PKA by describing the role of important PKA substrates (i.e., Rap1, cyclic adenosine monophosphate response element binding protein, and target gene brain-derived neurotrophic factor). These studies suggest the interesting possibility that PKA and related signaling molecules may serve as important neurobiological factors in suicide and may be relevant in target-specific therapeutic interventions for these disorders.
Dwivedi
Yogesh
Y
The Psychiatric Institute, Department of Psychiatry, University of Illinois at Chicago, 1601 West Taylor Street, Chicago, IL 60612, USA. ydwivedi@psych.uic.edu
Pandey
Ghanshyam N
GN
D000262:Adenylyl Cyclases / Q000502:physiology; D014150:Antipsychotic Agents / Q000627:therapeutic use; D015415:Biomarkers; D001921:Brain / Q000201:enzymology; D001923:Brain Chemistry / Q000502:physiology; D019208:Brain-Derived Neurotrophic Factor / Q000378:metabolism / Q000502:physiology; D000242:Cyclic AMP / Q000502:physiology; D017362:Cyclic AMP Response Element-Binding Protein / Q000378:metabolism; D017868:Cyclic AMP-Dependent Protein Kinases / Q000235:genetics* / Q000378:metabolism*; D019204:GTP-Binding Proteins / Q000502:physiology; D005938:Glucocorticoids / Q000502:physiology; D006380:Helplessness, Learned; D006801:Humans; D012307:Risk Factors; D015398:Signal Transduction / Q000502:physiology; D013315:Stress, Psychological / Q000201:enzymology / Q000523:psychology; D013405:Suicide / Q000523:psychology / Q000706:statistics & numerical data*; D020827:rap1 GTP-Binding Proteins / Q000235:genetics / Q000378:metabolism
D014150:Antipsychotic Agents; D015415:Biomarkers; D019208:Brain-Derived Neurotrophic Factor; D017362:Cyclic AMP Response Element-Binding Protein; D005938:Glucocorticoids; D000242:Cyclic AMP; D017868:Cyclic AMP-Dependent Protein Kinases; D019204:GTP-Binding Proteins; D020827:rap1 GTP-Binding Proteins; D000262:Adenylyl Cyclases
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