title: Polymorphisms of the kappa opioid receptor and prodynorphin genes: HIV risk and HIV natural history.
abstract: OBJECTIVE
  Studies indicate cross-desensitization between opioid receptors (eg, kappa opioid receptor, OPRK1) and chemokine receptors (eg, CXCR4) involved in HIV infection. Whether gene variants of OPRK1 and its ligand, prodynorphin (PDYN), influence the outcome of HIV therapy was tested.
  
  
  METHODS
  Three study points, admission to the Women's Interagency HIV Study, initiation of highly active antiretroviral therapy (HAART), and the most recent visit, were chosen for analysis as crucial events in the clinical history of the HIV patients. Regression analyses of 17 variants of OPRK1 and 11 variants of PDYN with change of viral load (VL) and CD4 count between admission and initiation of HAART and initiation of HAART to the most recent visit to Women's Interagency HIV Study were performed in 598 HIV+ subjects, including African Americans, Hispanics, and Whites. Association with HIV status was done in 1009 subjects.
  
  
  RESULTS
  Before HAART, greater VL decline (improvement) in carriers of PDYN IVS3+189C>T and greater increase of CD4 count (improvement) in carriers of OPRK -72C>T were found in African Americans. Also, greater increase of CD4 count in carriers of OPRK1 IVS2+7886A>G and greater decline of CD4 count (deterioration) in carriers of OPRK1 -1205G>A were found in Whites. After HAART, greater decline of VL in carriers of OPRK1 IVS2+2225G>A and greater increase of VL in carriers of OPRK1 IVS2+10658G>T and IVS2+10963A>G were found in Whites. Also, a lesser increase of CD4 count was found in Hispanic carriers of OPRK1 IVS2+2225G>A.
  
  
  CONCLUSIONS
  OPRK1 and PDYN polymorphisms may alter severity of HIV infection and response to treatment.
authors: Laboratory of the Biology of Addictive Diseases, The Rockefeller University, New York, NY 10065, USA. dmitri_proudnikov@hotmail.com
authors: Dmitri
authors: D
authors: Proudnikov
authors: Matthew
authors: M
authors: Randesi
authors: Orna
authors: O
authors: Levran
authors: Vadim
authors: V
authors: Yuferov
authors: Howard
authors: H
authors: Crystal
authors: Ann
authors: A
authors: Ho
authors: Jurg
authors: J
authors: Ott
authors: Mary J
authors: MJ
authors: Kreek
mesh_terms: D001741:Black or African American / Q000235:genetics; D023241:Antiretroviral Therapy, Highly Active; D018791:CD4 Lymphocyte Count; D015658:HIV Infections / Q000188:drug therapy / Q000235:genetics* / Q000503:physiopathology* / Q000821:virology; D015497:HIV-1 / Q000472:pathogenicity; D006630:Hispanic or Latino / Q000235:genetics; D006801:Humans; D020641:Polymorphism, Single Nucleotide / Q000235:genetics*; D011379:Prognosis; D019718:Receptors, CXCR4 / Q000235:genetics*; D017473:Receptors, Opioid, kappa / Q000235:genetics*; D012307:Risk Factors; D016896:Treatment Outcome; D019562:Viral Load; D044465:White People / Q000235:genetics
chemical_list: C527276:CXCR4 protein, human; C515653:OPRK1 protein, human; D019718:Receptors, CXCR4; D017473:Receptors, Opioid, kappa
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