A new mRNA and lipid nanoparticle (mRNA-LNP) platform could selectively reprogram in vivo cytotoxic effector T cells (Teff), the cells responsible for eliminating infected or tumor cells. To achieve this, scientists at the University of Pennsylvania conjugated LNPs with fractalkine, a molecule that binds to the CX3CR1 receptor, which is a marker of Teff cells. Using this strategy, the researchers delivered an mRNA encoding new proteins such as IL‑2 or human CD62 L‑selectin, opening the door to temporarily reprogramming these cells within the body, both in the blood and in lymphoid tissue, where they reside and become activated.

A new mRNA and lipid nanoparticle (mRNA-LNP) platform could selectively reprogram in vivo cytotoxic effector T cells (Teff), the cells responsible for eliminating infected or tumor cells. To achieve this, scientists at the University of Pennsylvania conjugated LNPs with fractalkine, a molecule that binds to the CX3CR1 receptor, which is a marker of Teff cells. Using this strategy, the researchers delivered an mRNA encoding new proteins such as IL‑2 or human CD62 L‑selectin, opening the door to temporarily reprogramming these cells within the body, both in the blood and in lymphoid tissue, where they reside and become activated.

A week after catching Moderna Inc. and its investors off guard with a refuse-to-file letter, the U.S. FDA has reversed course on the company’s BLA submission seeking approval of seasonal influenza vaccine mRNA-1010, now agreeing to review the application and setting an assigned PDUFA date of Aug. 5, 2026.

BioWorld’s 2022 end-of-year highlights included a toast to the future – of universal vaccines. Even before SARS-CoV-2 vaccines were developed in record time and saved countless lives during the COVID-19 pandemic, vaccines were a rare bright spot in the fight against infectious diseases. Bacteria are becoming multidrug resistant far faster than new classes of antibiotics are being developed, viral spillover events and vector ranges are increasing, and climate change is helping bacteria and fungi alike breach human thermal protections against infections.

The cardiomyositis that is a rare adverse effect of mRNA-based COVID vaccines is due to immune cell activity as a result of increased levels of the chemokines CXCL10 and interferon-γ (IFN-γ). Blocking CXCL10 and IFN-γ could prevent muscle cell damage in cell culture, and cardiomyositis in animal models. The findings, reported in the Dec. 10, 2025, issue of Science Translational Medicine, suggest a way of mitigating the risk of cardiomyositis.

When Robert Kennedy Jr. announced the cancellation of 22 projects related to mRNA vaccines and the end of new investments in that technology, the U.S. Secretary of Health only mentioned their use against respiratory viruses, without referring to other applications. The vaccines whose safety and effectiveness Kennedy is questioning are based on the same molecular principles as cancer vaccines under development. “Continued investment in mRNA technology is essential to fully realize its potential in oncology and ensure that promising strategies like neoantigen-based vaccines reach clinical application.” Kazuhiro Kakimi, professor at the Department of Immunology at Kindai University Faculty of Medicine, told BioWorld.

An ongoing concern for scientists is that there will be across-the-board funding cuts. This is already happening in mRNA research, where reductions affected coronavirus-related projects. During the pandemic, efforts focused on this pathogen, and once the health emergency was over, grants for antivirals were eliminated. However, these drugs could stem future outbreaks. Despite the cuts, recent research continues to demonstrate the potential of mRNA, not only for the development of antivirals, but also for obtaining more effective and longer-lasting vaccines.

In August, a press release from HHS announced the cancellation of 22 vaccine research projects based on mRNA, the latest available technology aimed at developing therapies for viral infections, cancer, and genetic conditions. What happens to mRNA innovation when funding dries up? This series explores how reductions in funding could impact mRNA technology, affecting innovation, research and future therapies.