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Clinical Microbiology Reviews, April 2003, p. 209-219, Vol. 16, No. 2
0893-8512/03/$08.00+0     DOI: 10.1128/CMR.16.2.209-219.2003
Copyright © 2003, American Society for Microbiology. All Rights Reserved.

Microbial Infections, Immunomodulation, and Drugs of Abuse

Herman Friedman,* Catherine Newton, and Thomas W. Klein

Department of Medical Microbiology and Immunology, College of Medicine, University of South Florida, Tampa, Florida 33612

The use of recreational drugs of abuse has generated serious health concerns. There is a long-recognized relationship between addictive drugs and increased levels of infections. Studies of the mechanisms of actions of these drugs became more urgent with the advent of AIDS and its correlation with abused substances. The nature and mechanisms of immunomodulation by marijuana, opiates, cocaine, nicotine, and alcohol are described in this review. Recent studies of the effects of opiates or marijuana on the immune system have demonstrated that they are receptor mediated, occurring both directly via specific receptors on immune cells and indirectly through similar receptors on cells of the nervous system. Findings are also discussed that demonstrate that cocaine and nicotine have similar immunomodulatory effects, which are also apparently receptor mediated. Finally, the nature and mechanisms of immunomodulation by alcohol are described. Although no specific alcohol receptors have been identified, it is widely recognized that alcohol enhances susceptibility to opportunistic microbes. The review covers recent studies of the effects of these drugs on immunity and on increased susceptibility to infectious diseases, including AIDS.

* Corresponding author. Mailing address: Department of Medical Microbiology and Immunology, College of Medicine, University of South Florida, Tampa, FL 33612. Phone: (813) 974-3281. Fax: (813) 974-4151. E-mail: hfriedma{at}hsc.usf.edu.

Clinical Microbiology Reviews, April 2003, p. 209-219, Vol. 16, No. 2
0893-8512/03/$08.00+0     DOI: 10.1128/CMR.16.2.209-219.2003
Copyright © 2003, American Society for Microbiology. All Rights Reserved.



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