Abstract
Human immunodeficiency virus (HIV)-1 patients who abuse opiates are at a greater risk of developing neurological complications of AIDS. Alterations in blood–brain barrier (BBB) integrity are associated with cytoskeletal disorganization and disruption of tight junction (TJ) integrity. We hypothesize that opiates in combination with HIV-1 viral proteins can modulate TJ expression in primary brain microvascular endothelial cells (BMVEC), thereby compromising BBB integrity and exacerbating HIV-1 neuropathogenesis. We investigated the effect of morphine and/or tat on the expression of TJ proteins ZO-1, JAM-2, Occludin and P-glycoprotein and the functional effects of TJ modulation in BMVEC. Morphine and/or tat, via the activation of pro-inflammatory cytokines, intracellular Ca2+ release, and activation of myosin light chain kinase, modulated TJ expression resulting in decreased transendothelial electric resistance and enhanced transendothelial migration across the BBB. These studies may lead to the development of novel anti-HIV-1 therapeutics that target specific TJ proteins, thus preventing TJ disruption in opiate using HIV-1 patients.
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Acknowledgments
This work was supported in part by grants from the Margaret Duffy and Robert Cameron Troup Memorial Fund of Kaleida Health and the Kaleida Health Foundation. Authors would like to thank Elizabeth Hemedinger, Manager of Laboratory Services at Upstate New York Transplant Services, 110 Broadway, Buffalo, NY 14203 for her assistance in providing leukocyte depletion filters as source of peripheral leukocyte populations for these studies.
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Appendix: Abbreviations
Appendix: Abbreviations
- HIV-1:
-
human immunodeficiency virus-1
- ADC:
-
AIDS dementia complex
- BBB:
-
blood–brain barrier
- BMVEC:
-
brain microvascular endothelial cells
- CNS:
-
central nervous system
- DEPC:
-
diethyl pyrocarbonate
- HAD:
-
HIV-1-associated dementia
- HIVE:
-
human immunodeficiency virus associated encephalopathy
- IL-8:
-
Interleukin-8
- JAM-2:
-
junctional adhesion molecule-2
- MLCK:
-
myosin light chain kinase
- NHA:
-
normal human astrocytes
- PBS:
-
phosphate buffer saline
- TAI:
-
transcript accumulation index
- TEER:
-
transendothelial electrical resistance
- TJ:
-
tight junctions
- TNF-α:
-
tumor necrosis factor-alpha
- ZO-1:
-
zona occludins
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Mahajan, S.D., Aalinkeel, R., Sykes, D.E. et al. Tight Junction Regulation by Morphine and HIV-1 Tat Modulates Blood–Brain Barrier Permeability. J Clin Immunol 28, 528–541 (2008). https://doi.org/10.1007/s10875-008-9208-1
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DOI: https://doi.org/10.1007/s10875-008-9208-1