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Good or evil: CD26 and HIV infection.
T Ohtsuki1, H Tsuda, C Morimoto
1Department of Clinical Immunology and AIDS Research Center, The Institute of Medical Science, The University of Tokyo, Japan.
Journal of Dermatological Science
|March 4, 2000
Summary
CD26, a protein on T cells, is crucial in HIV infection. Its interaction with HIV facilitates viral entry and suppresses immune responses, impacting disease progression and chemokine function.
Area of Science:
- Immunology
- Virology
- Biochemistry
Background:
- Acquired immune deficiency syndrome (AIDS) remains incurable, driving global research efforts.
- Human immunodeficiency virus (HIV) preferentially infects and depletes CD26-expressing T cells.
Purpose of the Study:
- To elucidate the role of CD26 in HIV infection and disease progression.
- To investigate the interaction between CD26 and HIV components.
- To understand CD26's influence on immune responses and chemokine function in HIV infection.
Main Methods:
- Analysis of CD26 expression in HIV-infected individuals.
- Investigation of interactions between HIV proteins (Tat, gp120) and CD26.
- Assessment of CD26/dipeptidyl peptidase IV (DPPIV) activity on chemokine function (RANTES, SDF-1).
Main Results:
- CD26 expression correlates with HIV susceptibility.
- HIV proteins Tat and gp120 interact with CD26, facilitating viral entry.
- CD26/DPPIV activity regulates chemokines, affecting lymphocyte trafficking and HIV infectivity.
Conclusions:
- CD26 plays a significant role in HIV cell entry and T cell immune suppression.
- CD26/DPPIV regulation of chemokines is vital for controlling lymphocyte movement and HIV spread.