Opiate drug abuse is a critical contributor to the global AIDS epidemic, and over a third of HIV infections in the U.S. can be linked to intravenous drug abuse. Recent estimates suggest that almost 20% of intravenous drug abusers are infected with HIV. Tobacco smoking is prevalent in HIV-infected patients, and is very common among intravenous drug abusers. Importantly, smoking is strongly associated with a number of non-AIDS conditions, including chronic obstructive lung disease (COPD), and this chronic inflammatory disease may contribute to the development of neuroinflammation associated with HIV infection. However, there is very little known about the combined effects of tobacco smoke and chronic opioid administration on the development of inflammatory responses, and even less known about the effects of these clinically relevant drugs on the development of neurodegeneration following HIV infection. We describe preliminary data which shows that the inflammatory response is both quantitatively and qualitatively distinct following the combination of tobacco and opiate administration. We propose to conduct experiments using humanized mice to examine the combined effects of chronic tobacco smoke exposure with and without chronic administration of morphine on the development of HIV-induced neuroinflammation. Our published and preliminary data show that the blood-brain barrier is a target for the effects of opiates and/or tobacco, as well as the inflammatory activity of monocytes and macrophages. We propose to investigate the mechanistic basis for the combined effects of these drug treatments on these cell populations. We believe the proposed studies will provide highly novel information about the effects of morphine and tobacco smoke on HIV-associated neurodegeneration in a clinically relevant immunological context.

Public Health Relevance

Studies are proposed to determine the combined chronic effects of both tobacco smoke exposure and morphine administration on the development of HIV-associated neuroinflammation. To our knowledge this is would be the first study of the disease consequences of two drug treatments in the context of HIV infection. This will provide critical novel information on the intersection of drugs and an infectious agent that are frequently encountered together in the clinic.

Agency
National Institute of Health (NIH)
Institute
National Institute on Drug Abuse (NIDA)
Type
Research Project (R01)
Project #
5R01DA040619-02
Application #
9330832
Study Section
Special Emphasis Panel (ZRG1-AARR-E (02)M)
Program Officer
Purohit, Vishnudutt
Project Start
2016-08-15
Project End
2021-05-31
Budget Start
2017-06-01
Budget End
2018-05-31
Support Year
2
Fiscal Year
2017
Total Cost
$761,723
Indirect Cost
$273,439
Name
Temple University
Department
Internal Medicine/Medicine
Type
Schools of Medicine
DUNS #
057123192
City
Philadelphia
State
PA
Country
United States
Zip Code
19122
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Seliga, Alecia; Lee, Michael Hweemoon; Fernandes, Nicole C et al. (2018) Kallikrein-Kinin System Suppresses Type I Interferon Responses: A Novel Pathway of Interferon Regulation. Front Immunol 9:156
Merkel, Steven F; Razmpour, Roshanak; Lutton, Evan M et al. (2017) Adolescent Traumatic Brain Injury Induces Chronic Mesolimbic Neuroinflammation with Concurrent Enhancement in the Rewarding Effects of Cocaine in Mice during Adulthood. J Neurotrauma 34:165-181