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Related Experiment Videos

Interferon lambda 3/4 polymorphisms are associated with AIDS-related Kaposi's sarcoma.

Stéphanie Bibert1, Agnieszka Wójtowicz1, Patrick Taffé2

  • 1Infectious Diseases Service, Department of Medicine.

AIDS (London, England)
|September 21, 2018
PubMed
Summary

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Single nucleotide polymorphisms in the Interferon lambda 3/4 region (IFNL3/4) are linked to an increased risk of developing Kaposi's sarcoma in men who have sex with men. This finding highlights genetic factors influencing AIDS-related cancer susceptibility.

Area of Science:

  • Genetics
  • Immunology
  • Oncology

Background:

  • Kaposi's sarcoma is a significant AIDS-related cancer, particularly in resource-limited settings.
  • Single nucleotide polymorphisms (SNPs) in the Interferon lambda 3/4 (IFNL3/4) region affect IFNL4 expression and viral infection outcomes.

Purpose of the Study:

  • To investigate the association between IFNL3/4 variants and susceptibility to AIDS-related Kaposi's sarcoma.
  • To analyze IFNL3/4 SNPs rs8099917 and rs12980275 in men who have sex with men (MSM) within the Swiss HIV Cohort Study (SHCS).

Main Methods:

  • Assessed risk of Kaposi's sarcoma based on IFNL3/4 SNPs and haplotypic combinations.
  • Utilized cumulative incidence curves and Cox regression models, adjusting for relevant covariates.
  • Analyzed 2558 MSM participants from the Swiss HIV Cohort Study.

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Main Results:

  • Both rs12980275 and rs8099917 were significantly associated with an increased risk of Kaposi's sarcoma.
  • Diplotypes predicting the active P70 form of IFNL4 showed a higher risk compared to those not producing IFNL4.
  • The association remained significant after multivariate analysis, including adjustments for age, antiretroviral therapy, and CD4+ T-cell counts.

Conclusions:

  • This study establishes, for the first time, a link between IFNL3/4 polymorphisms and susceptibility to AIDS-related Kaposi's sarcoma.
  • Genetic variations in the IFNL3/4 region may play a role in the development of Kaposi's sarcoma in HIV-infected individuals.