How Similarity Between HIV-1 and Human Proteins Affects Immune Response
Author Information
Author(s): Rolland Morgane, Nickle David C., Deng Wenjie, Frahm Nicole, Brander Christian, Learn Gerald H., Heckerman David, Jojic Nebosja, Jojic Vladimir, Walker Bruce D., Mullins James I.
Primary Institution: Department of Microbiology, University of Washington, Seattle, Washington, United States of America
Hypothesis
Dominance profiles in the HIV-specific CTL responses reflect an inverse relationship between the similarity of an HIV epitope to the host proteome and its immunogenicity.
Conclusion
HIV-1 peptides that are less similar to human proteins are more likely to elicit a strong immune response.
Supporting Evidence
- HIV immunogenicity could be partially modulated by the sequence similarity to the host proteome.
- Peptides that most frequently elicited a response presented less matches to human proteins.
- The more a Nef peptide was different from its closest human peptide, the stronger the immune response it elicited.
Takeaway
The study found that HIV-1 proteins that look less like human proteins are better at getting the immune system to respond. This means that if a part of the virus is too similar to our own proteins, our body might ignore it.
Methodology
The study analyzed the similarity between HIV-1 peptides and the human proteome using ELISpot assays on samples from HIV-infected individuals.
Limitations
The study's observations are based on trends and may not apply universally to all HIV-1 peptides.
Participant Demographics
The study involved 314 HIV-infected individuals and a subgroup of 30 individuals for additional analysis.
Statistical Information
P-Value
0.0002
Statistical Significance
p=0.046
Digital Object Identifier (DOI)
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