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GPS-like system shows promise as HIV vaccine strategy to elicit critical antibodies

New approach could potentially be applied to vaccines targeting other diseases

Date:
May 9, 2024
Source:
Duke University Medical Center
Summary:
A team has developed a vaccine approach that works like a GPS, guiding the immune system through the specific steps to make broadly neutralizing antibodies against HIV.
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A team led by the Duke Human Vaccine Institute (DHVI) has developed a vaccine approach that works like a GPS, guiding the immune system through the specific steps to make broadly neutralizing antibodies against HIV.

Publishing in the journal Cell Host & Microbe, the study describes an approach that provides step-by-step directions for the immune system to generate the elusive, yet necessary antibodies for a successful HIV vaccine.

"HIV is the fastest-evolving virus known. So it's been a long-standing goal in HIV research to create a vaccine that can generate broadly neutralizing antibodies that can recognize diverse HIV strains," said lead author Kevin Wiehe, Ph.D., associate professor in the Department of Medicine at Duke University School of Medicine and director of research at DHVI.

Wiehe and colleagues started with an engineered version of a broadly neutralizing antibody in its original state, before any mutations occurred. Knowing that the antibody will need to mutate to keep up with the ever-changing HIV virus, the researchers then added sequential mutations one-by-one to determine which mutations were essential for the antibody to broadly neutralize HIV.

Doing this allowed them to figure out what the exact points were along the route to arrive at broadly neutralizing antibodies. They then developed a vaccine which gave the immune system the turn-by-turn directions to follow that mutational route.

Using mice specially bred to encode for the original version of the antibody, the researchers demonstrated that the guidance system approach triggered the immune system to start churning out the sought-after antibodies.

"This paper shows that our mutation-guided vaccine strategy can work," said Wiehe, adding that the technique could also be used in vaccines for other diseases. "This strategy potentially gives us a way to design vaccines to direct the immune system to make any antibody we want, which could be a broadly neutralizing antibody for all coronavirus variants, or an anti-cancer antibody."

Wiehe said the next challenge will be to reproduce the study in primates and then humans.

In addition to Wiehe, study authors includes Kevin O. Saunders, Victoria Stalls, Derek W. Cain, Sravani Venkatayogi, Joshua S. Martin Beem, Madison Berry, Tyler Evangelous, Rory Henderson, Bhavna Hora, Shi-Mao Xia, Chuancang Jiang, Amanda Newman, Cindy Bowman, Xiaozhi Lu, Mary E. Bryan, Joena Bal, Aja Sanzone, Haiyan Chen, Amanda Eaton, Mark A. Tomai, Christopher B. Fox, Ying Tam, Christopher Barbosa, Mattia Bonsignori, Hiromi Muramatsu, S. Manir Alam, David Montefiori, Wilton B. Williams, Norbert Pardi, Ming Tian, Drew Weissman, Frederick W. Alt, Priyamvada Acharya, and Barton F. Haynes.

The study received funding support from the National Institute of Allergy and Infectious Diseases, a part of the National Institutes of Health (UM1AI144371, 1U19AI135902-01, P01AI131251-01).


Story Source:

Materials provided by Duke University Medical Center. Note: Content may be edited for style and length.


Journal Reference:

  1. Kevin Wiehe, Kevin O. Saunders, Victoria Stalls, Derek W. Cain, Sravani Venkatayogi, Joshua S. Martin Beem, Madison Berry, Tyler Evangelous, Rory Henderson, Bhavna Hora, Shi-Mao Xia, Chuancang Jiang, Amanda Newman, Cindy Bowman, Xiaozhi Lu, Mary E. Bryan, Joena Bal, Aja Sanzone, Haiyan Chen, Amanda Eaton, Mark A. Tomai, Christopher B. Fox, Ying K. Tam, Christopher Barbosa, Mattia Bonsignori, Hiromi Muramatsu, S. Munir Alam, David C. Montefiori, Wilton B. Williams, Norbert Pardi, Ming Tian, Drew Weissman, Frederick W. Alt, Priyamvada Acharya, Barton F. Haynes. Mutation-guided vaccine design: A process for developing boosting immunogens for HIV broadly neutralizing antibody induction. Cell Host & Microbe, 2024; 32 (5): 693 DOI: 10.1016/j.chom.2024.04.006

Cite This Page:

Duke University Medical Center. "GPS-like system shows promise as HIV vaccine strategy to elicit critical antibodies." ScienceDaily. ScienceDaily, 9 May 2024. <www.sciencedaily.com/releases/2024/05/240509170244.htm>.
Duke University Medical Center. (2024, May 9). GPS-like system shows promise as HIV vaccine strategy to elicit critical antibodies. ScienceDaily. Retrieved May 24, 2024 from www.sciencedaily.com/releases/2024/05/240509170244.htm
Duke University Medical Center. "GPS-like system shows promise as HIV vaccine strategy to elicit critical antibodies." ScienceDaily. www.sciencedaily.com/releases/2024/05/240509170244.htm (accessed May 24, 2024).

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