CD4-independent Use of CCR5 by SIVsm Isolates
Author Information
Author(s): Laureen Anna, Elzbieta Vincic, Hiroo Hoshino, Rigmor Thorstensson, Eva Maria Fenyö
Primary Institution: Lund University
Hypothesis
Can SIVsm isolates use CCR5 independently of CD4 and how does this relate to neutralization sensitivity and macrophage tropism?
Conclusion
SIVsm isolates can use CCR5 independently of CD4, with variations in CD4 independence and neutralization sensitivity over time.
Supporting Evidence
- Early SIVsm isolates showed a pronounced CD4-independence.
- Late isolates were often more CD4-dependent.
- Phenotype changes occurred faster in progressor macaques than in long-term non-progressors.
- All isolates replicated efficiently in macrophages.
Takeaway
This study found that some viruses can enter cells without needing a specific helper protein, which might help them spread better and avoid the immune system.
Methodology
The study analyzed SIVsm isolates from 13 macaques for their ability to use CCR5 independently of CD4, examining their neutralization sensitivity and macrophage tropism.
Limitations
The small sample size may limit the generalizability of the findings.
Participant Demographics
Cynomolgus macaques (Macaca fascicularis) of Chinese origin.
Statistical Information
P-Value
0.0703
Statistical Significance
p = 0.0703
Digital Object Identifier (DOI)
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