New ways to pressure HIV

Two new studies showing that protein bits produced by unusual “reading” of the HIV genome can induce immune responses will appear online in the Journal of Experimental Medicine on Jan. 11 (

Small, compact RNA viruses like HIV make the most of their limited genomes by stuffing genes that direct protein production into several different reading frames and orientations. When teams — led by Berger et al. at the Ragon Institute of MGH, MIT, and Harvard; and Bansal et al. at the University of Alabama — examined viral genomes in groups of HIV-infected individuals, they found an accumulation of genetic variations specifically in unusual reading frames and orientations. This finding suggested that mutations in these reading frames may have been caused by pressure from the hosts’ immune systems.

The notion was supported by their finding that HIV-infected individuals exhibited killer immune cell responses specific for protein fragments generated by unconventional reading of the HIV genome. In some cases, mutations in these reading frames allowed HIV-infected cells to escape immune cell killing.

The information provided by these findings may prove useful during future HIV vaccine design efforts.

About The Journal of Experimental Medicine

The Journal of Experimental Medicine (JEM) is published by The Rockefeller University Press. All editorial decisions on manuscripts submitted are made by active scientists in conjunction with our in-house scientific editors. JEM content is posted to PubMed Central, where it is available to the public for free six months after publication. Authors retain copyright of their published works and third parties may reuse the content for non-commercial purposes under a creative commons license. For more information, please visit

Bansal, A., et al. 2010. J. Exp. Med. doi:10.1084/jem.20092060

Berger, C., et al. 2010. J. Exp. Med. doi:10.1084/jem.20091808

The material in this press release comes from the originating research organization. Content may be edited for style and length. Have a question? Let us know.


One email, each morning, with our latest posts. From medical research to space news. Environment to energy. Technology to physics.

Thank you for subscribing.

Something went wrong.

Leave a Comment

This site uses Akismet to reduce spam. Learn how your comment data is processed.