Sex differences at the cellular level could explain why men respond less well to glioblastoma (GBM) treatments, according to a study led by the Washington University School of Medicine in St. Louis (WUSTL). The researchers found that male and female GBM tumor cells had different metabolic needs. GBM cells from male surgical samples absorbed more glutamine and had different nutritional preferences for amino acids.

Treatment with injections of gonadotropin-releasing hormone (GnRH), indicated to prevent sexual maturation deficits in Down syndrome, also reduced cognitive function impairment associated with Down syndrome, also called trisomy 21. With age, about three-quarters of people with Down syndrome develop Alzheimer's disease. They also lose their sense of smell. Both circumstances could improve with pulse doses of GnRH, according to a study led by the French National Institute of Health and Medical Research (Inserm) and the University of Lausanne (UNIL) published in the Sept. 1, 2022, issue of Science.

Scientists have discovered a new antibiotic called evybactin that is able to selectively target Mycobacterium tuberculosis, the bacteria that causes tuberculosis (TB) lung infections. As described in Nature Chemical Biology on Aug. 22, 2022. the work is still at an early stage and requires further validation. But, if successful in clinical trials, evybactin could form part of a new group of specific antibiotics designed to target TB.