A large-scale study cross-referencing genomic data from multiple sources with primary care health records has identified genetic overlaps in 72 chronic diseases, opening the way for a more holistic approach to researching, treating and preventing multimorbidity.

Scientists at the University of Pittsburgh have tested a broadly neutralizing antibody that binds the stem of a protein against H5N1 avian influenza, which prevented severe disease in nonhuman primates and was effective for at least 8 weeks. The scientists remark on the potential of the design developed by Astrazeneca plc against a possible outbreak of the influenza A virus.

The liver and pancreas are the main actors in glucose metabolism, but not the only ones. Muscles, adipose tissue and the brain play different roles. However, the prize for the best new actor in glucagon production goes to the innate lymphoid cells (ILCs), which, according to a study published in Science, respond to intestine neuron signals traveling to the pancreas to control glucose.

According to the World Health Organization (WHO), multidrug-resistant pathogens caused over 1.27 million deaths worldwide in 2020. And figures are rising, with projections pointing to antimicrobial resistance surpassing cancer as the leading cause of death by 2050. Now, researchers at the HUN-REN Biological Research Center have unveiled the role of pre-existing genetic variabilities and specific cross-resistance patterns among several antibiotics designed to combat gram-positive bacteria.

The PD-1 receptor, a major immune checkpoint inhibitor whose signaling is the target of multiple blockbuster anticancer drugs, differs functionally between rodents and humans in previously unknown ways. Researchers from the University of California, San Diego, and co-authors at the Chinese Academy of Sciences and the National Cancer Institute reported these findings in the Jan. 3, 2025, online issue of Science Immunology.

2024 saw the completion of several cellular-resolution brain maps, including the entire fly brain and a comprehensive connections map of a cubic centimeter of human brain. 2025 began with the addition of another important map. In the Jan. 1, 2025, issue of Nature, researchers from the Allen Institute presented a map of areas and cell types where aging most affected the mouse brain.

Researchers at the University of Leipzig and ETH Zurich have used single-cell sequencing to identify differences between fat tissue of obese individuals who are metabolically unhealthy, and those who were in good metabolic health. The findings, which were published online Dec. 17, 2024, in Cell Metabolism, identify measurements that can be used to decouple obesity from metabolic disease.

Researchers from the University of California San Francisco (UCSF) have successfully replicated the design of regulatory T cells, achieving local targeted immune suppression and protection from CAR T-cell cytotoxicity. Many of the treatments used so far in the context of inflammatory and autoimmune disorders lead to systemic immunosuppression. In this sense, limiting immunosuppression locally to targeted tissues may help overcome systemic toxicity.

Although it does not generally infect humans, a single mutation of the H5N1 virus in the highly pathogenic avian and bovine clade 2.3.4.4b could overcome this barrier and possibly trigger a pandemic. Scientists at The Scripps Research Institute have warned of this possibility after studying the three-dimensional structure of the viral hemagglutinin and seeing how a change in one amino acid would make it more suitable for the human cell receptor. The researchers stress the need to monitor new mutations of this virus in order to act quickly in case the global jump to our species occurs.

Researchers at the University of Rochester have described a neuroimaging-based biomarker that could identify individuals with early psychosis, and improved their identification when it was added to a standard neurocognitive diagnostic test. In a group of roughly 160 participants in the Human Connectome Early Psychosis Project, individuals who were in the early stages of psychosis had stronger connections from the thalamus (a midbrain sensory processing area) to the cortex, but weaker connections between different cortical areas, than controls.