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Related Experiment Videos

HIV and children: the developing immune system fights back.

M E Feeney1

  • 1Partners AIDS Research Center and Infectious Disease Division, Massachusetts General Hospital, Boston, Massachusetts 02129, USA. mfeeney@partners.org

The West Indian Medical Journal
|January 29, 2005
PubMed
Summary

Children with HIV show varied disease progression, largely due to unknown immune responses. Understanding these differences in HIV-specific immune responses, particularly cytotoxic T lymphocyte and T-helper cells, is key for effective treatments and vaccines.

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Immune escape precedes breakthrough human immunodeficiency virus type 1 viremia and broadening of the cytotoxic T-lymphocyte response in an HLA-B27-positive long-term-nonprogressing child.

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Comprehensive screening reveals strong and broadly directed human immunodeficiency virus type 1-specific CD8 responses in perinatally infected children.

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Comprehensive epitope analysis of human immunodeficiency virus type 1 (HIV-1)-specific T-cell responses directed against the entire expressed HIV-1 genome demonstrate broadly directed responses, but no correlation to viral load.

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Area of Science:

  • Immunology
  • Virology
  • Pediatrics

Background:

  • Children with HIV exhibit diverse clinical outcomes and disease progression rates.
  • Cellular immune responses are increasingly recognized as critical for controlling HIV viral load in adults.
  • Limited understanding exists regarding HIV-specific immune responses in perinatally infected children.

Purpose of the Study:

  • To investigate the differences in HIV-specific immune responses between HIV-infected children and adults.
  • To identify correlates of viral containment in children with vertically acquired HIV infection.
  • To inform the development of novel HIV vaccines and immunotherapies for pediatric populations.

Main Methods:

  • Comparative analysis of HIV-specific cytotoxic T lymphocyte (CD8+ T cell) responses.

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  • Assessment of T-helper (CD4+ T cell) responses in perinatally HIV-infected children.
  • Correlation of immune response profiles with viral load and clinical progression.

    • Main Results:

    • HIV-specific immune responses, including CD8+ and CD4+ T cell functions, differ between HIV-infected children and adults.
    • These immunological differences may impact the ability to control HIV viremia in children.
    • Specific immune response elements correlating with viral containment in children are yet to be fully elucidated.

    Conclusions:

    • Understanding pediatric HIV-specific immunity is crucial for explaining disease variability.
    • Identifying immune correlates of viral control in children is essential for advancing HIV pathogenesis research.
    • Insights gained will aid in designing targeted HIV vaccines and immunotherapies for children.