Title |
Pandemic HIV-1 Vpu overcomes intrinsic herd immunity mediated by tetherin
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Published in |
Scientific Reports, July 2015
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DOI | 10.1038/srep12256 |
Pubmed ID | |
Authors |
Shingo Iwami, Kei Sato, Satoru Morita, Hisashi Inaba, Tomoko Kobayashi, Junko S. Takeuchi, Yuichi Kimura, Naoko Misawa, Fengrong Ren, Yoh Iwasa, Kazuyuki Aihara, Yoshio Koyanagi |
Abstract |
Among the four groups of HIV-1 (M, N, O, and P), HIV-1M alone is pandemic and has rapidly expanded across the world. However, why HIV-1M has caused a devastating pandemic while the other groups remain contained is unclear. Interestingly, only HIV-1M Vpu, a viral protein, can robustly counteract human tetherin, which tethers budding virions. Therefore, we hypothesize that this property of HIV-1M Vpu facilitates human-to-human viral transmission. Adopting a multilayered experimental-mathematical approach, we demonstrate that HIV-1M Vpu confers a 2.38-fold increase in the prevalence of HIV-1 transmission. When Vpu activity is lost, protected human populations emerge (i.e., intrinsic herd immunity develops) through the anti-viral effect of tetherin. We also reveal that all Vpus of transmitted/founder HIV-1M viruses maintain anti-tetherin activity. These findings indicate that tetherin plays the role of a host restriction factor, providing 'intrinsic herd immunity', whereas Vpu has evolved in HIV-1M as a tetherin antagonist. |
X Demographics
Geographical breakdown
Country | Count | As % |
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Unknown | 1 | 100% |
Demographic breakdown
Type | Count | As % |
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Members of the public | 1 | 100% |
Mendeley readers
Geographical breakdown
Country | Count | As % |
---|---|---|
United States | 1 | 4% |
Unknown | 25 | 96% |
Demographic breakdown
Readers by professional status | Count | As % |
---|---|---|
Student > Ph. D. Student | 5 | 19% |
Student > Master | 4 | 15% |
Researcher | 4 | 15% |
Student > Bachelor | 3 | 12% |
Professor | 2 | 8% |
Other | 4 | 15% |
Unknown | 4 | 15% |
Readers by discipline | Count | As % |
---|---|---|
Immunology and Microbiology | 6 | 23% |
Agricultural and Biological Sciences | 6 | 23% |
Biochemistry, Genetics and Molecular Biology | 3 | 12% |
Medicine and Dentistry | 3 | 12% |
Mathematics | 1 | 4% |
Other | 2 | 8% |
Unknown | 5 | 19% |