Why past malaria infections make vaccines work less well
Mechanisms of compromised CD8 T cell responses to vaccination in malaria experienced hosts
This project is testing ways to improve vaccine-driven CD8 T cell responses in people who have had malaria.
Quick facts
| Grant type | R01 grant |
|---|---|
| Study type | NIH-funded research |
| Funding institution | University of Iowa NIH-funded |
| Lab location | 1 site (Iowa City, United States) |
| Project ID | NIH-11304077 on NIH RePORTER |
What this research studies
Researchers will use a mouse model that mimics prior blood-stage malaria infection to understand why CD8 T cells respond poorly to radiation-attenuated sporozoite (RAS) vaccines in malaria-experienced hosts. The team will compare immune responses after RAS vaccination in mice with and without prior Plasmodium exposure, focusing on antigen presentation, CD8 T cell activation, and memory formation. Results will be related to known human outcomes from controlled human malaria infection (CHMI) and past clinical work to guide vaccine strategies for people living in endemic areas. The aim is to pinpoint immune mechanisms that can be targeted to restore protective liver-stage immunity.
Who could benefit from this research
Good fit: Ideal candidates for follow-up human work would be people living in malaria-endemic areas or those with a history of prior malaria infection when clinical studies are offered.
Not a fit: People without prior malaria exposure or whose health issues are unrelated to malaria may not see direct short-term benefit from these findings.
Why it matters
Potential benefit: If successful, this work could lead to vaccines or immune-focused strategies that protect people in malaria-endemic regions more reliably.
How similar studies have performed: Radiation-attenuated sporozoite (RAS) vaccines have shown strong protection in malaria-naïve volunteers, but their reduced effectiveness in malaria-experienced populations is a less-tested problem.
Where this research is happening
Iowa City, United States
- University of Iowa — Iowa City, United States (Active)
Researchers
- Principal investigator: Harty, John T — University of Iowa
- Study coordinator: Harty, John T
About this research
- This is an active NIH-funded research project — typically early-stage science, not a clinical trial accepting patient enrollment.
- Some NIH-funded labs run parallel clinical studies or seek volunteers for related work. To check, contact the principal investigator or institution listed above.
- For full project details, budget, and progress reports, visit the official NIH RePORTER page below.