Australian researchers have identified a previously overlooked population of immune cells in the skin that physically restrain melanoma growth by engulfing live melanoma cells, and the discovery could reshape thinking around macrophage-targeted cancer therapies and innate immunity in oncology.

A new metasurface design strategy that replaces rigid order with “engineered disorder” could significantly increase how many optical functions can be integrated into a single ultra-thin device without increasing size or complexity, according to a study published in Nature Communications. The study challenges a longstanding assumption in optical engineering that highly ordered, periodic structures are required to precisely control light.

Hematopoietic stem cell research over the past century has shown that leukemia may be driven by an invisible hand of inflammation. The bone marrow and inflammation, then, may hold the keys to preventing blood cancers, according to John E. Dick’s plenary session at the 2026 Korean Society of Hematology International Conference, held March 26, 2026.

Cancer cells expand through mutations – but not just through mutations. They also change their behavior in the absence of underlying genetic alterations. Such plasticity helps the cells both adapt to the cellular stress fueled by out-of-control growth and resist targeted and chemotherapies alike. Investigators from Memorial Sloan Kettering Cancer Center and Huazhong Agricultural University have gained new insights into the underlying mechanisms of plasticity.

The sea anemone Stichodactyla helianthus, which carpets the Caribbean seafloor, may hold the key to eliminating the senescent cells that survive cancer therapy. A collaboration led by Spanish scientists across several international research centers has discovered a new type of toxin that selectively eliminates senescent cancer cells.

In October, the Nobel Committee awarded the 2025 Nobel Prize in Physiology or Medicine to Shimon Sakaguchi, Mary Brunkow and Fred Ramsdell for their discoveries in the field of autoimmunity.

Australian researchers have found a drug combination that can bypass the cellular defenses in neuroblastoma that lead to relapse, and the discovery could lead to better treatment strategies for children whose cancers have stopped responding to standard chemotherapy.

2025 has been the most challenging year in the efforts to fight HIV since at least the advent of antiretroviral therapy. In a report on “Overcoming disruption, transforming the AIDS response,” released last week ahead of World AIDS Day on Dec. 1, the Joint United Nations Program on HIV/AIDS (UNAIDS) described “a global system in shock” by sharply reduced funding from the U.S. and other wealthy nations. Scientifically, for now, progress is ongoing.

Researchers from the Chinese Institute for Brain Research, the Chinese Academy of Medical Sciences, and their collaborators have identified adenosine as the driving force behind the rapid, fast-acting antidepressant effects of ketamine and electroconvulsive therapy (ECT). “Our journey into this area of research began over a decade ago, around 2013, when the clinical world was buzzing with excitement about ketamine's remarkably rapid antidepressant effects,” Minmin Luo, co-senior author of the study, told BioWorld.

Stem cells are a promising therapeutic modality to fight aging and age-related disease, speakers at the Bio-Plus Interphex Korea 2025 said. Progress in cell-based longevity medicine is being made, they added, although safety, ethical and regulatory issues are ongoing challenges.