Osteoporosis affects millions of people worldwide, weakening bones and increasing the risk of fractures. Now, researchers have identified the AXL receptor tyrosine kinase (Axl) as a key molecule that limits the activity of bone-forming cells. Blocking Axl with a small-molecule inhibitor increased bone formation and bone mass in mice while revealing how the receptor controls bone development. These findings could support the development of more accessible treatments for osteoporosis and other bone diseases.

Researchers have uncovered a previously unknown molecular mechanism driving B-cell dysfunction in Kawasaki disease (KD), identifying the enzyme USP22 as a critical regulator of B-cell activation and a potential therapeutic target. The findings, published in Science Bulletin, trace a signaling axis from USP22 through CHD4 to CD19, offering new insights into the immunological basis of this pediatric vasculitis.

A 67-year-old woman with no known chronic illnesses presented with bilateral leg swelling, weakness, and fatigue, rapidly progressing to septic shock, acute kidney injury, and deep vein thrombosis. Chest imaging revealed a pulmonary mass, hepatic lesions, and a brain metastasis. Despite broadspectrum antibiotics, cultures remained negative and her condition worsened. A liver biopsy confirmed metastatic nonsmall cell lung adenocarcinoma. The case underscores that occult malignancy can mimic or coexist with sepsis, and failure to improve within 48–72 hours of antimicrobial therapy should prompt early evaluation for cancer, multidisciplinary involvement, and timely goals-of-care discussions..

A pilot study from Venezuelan and U.S. institutions reveals significant metabolic reprogramming of tryptophan, arginine, and glutamine pathways in head and neck carcinoma (HNC) patients. Serum tryptophan and the arginine/putrescine ratio emerged as potential dynamic biomarkers for monitoring treatment response, while the glutamine-to-glutamate shift indicates enhanced glutaminolysis in active tumours. The findings provide a rationale for larger validation studies and offer low-cost analytical tools for resource-limited settings.