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Long-term HIV-1 infection without immunologic progression

S P Buchbinder1, M H Katz, N A Hessol

  • 1AIDS Office, Department of Public Health, San Francisco, California 94102.

AIDS (London, England)
|August 1, 1994
PubMed
Summary

Some individuals with long-term HIV infection remain healthy for over a decade without immunologic decline. Factors like sexually transmitted diseases or drug use do not explain this delayed HIV progression in healthy long-term HIV-positives.

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Area of Science:

  • Immunology
  • Infectious Diseases
  • HIV/AIDS Research

Background:

  • Human Immunodeficiency Virus (HIV) infection typically leads to immunologic decline and Acquired Immunodeficiency Syndrome (AIDS).
  • Identifying factors influencing disease progression is crucial for understanding HIV pathogenesis and developing interventions.

Purpose of the Study:

  • To identify and characterize a subgroup of men with HIV experiencing long-term infection (10-15 years) without significant immunologic progression.
  • To evaluate the potential impact of sexually transmitted diseases (STD) and recreational drug use on delayed HIV disease progression.

Main Methods:

  • An inception cohort study was conducted involving 588 men with documented HIV seroconversion dates and 197 HIV-seronegative controls.
  • Key outcome measures included AIDS development, CD4+ T-cell counts, rate of CD4+ cell loss, CD8+ counts, and clinical parameters.

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Main Results:

  • Approximately 8% of men with HIV seroconversion prior to 1983 were identified as healthy long-term HIV-positives (HLP), maintaining CD4+ counts > 500 x 10(6)/l for over 10 years.
  • HLP exhibited a significantly slower rate of CD4+ decline compared to progressors and had fewer immunologic and clinical abnormalities, though CD4+ counts were lower than in HIV-uninfected controls.
  • No consistent differences in prior exposure to recreational drugs or STD were found between HLP and progressors.

Conclusions:

  • A distinct subgroup of individuals with long-term HIV infection can remain clinically and immunologically healthy for 10-15 years post-seroconversion.
  • Delayed disease progression in these healthy long-term HIV-positives does not appear to be explained by a lack of exposure to STD or recreational drugs.