Life and Health Today Weekly: Semaglutide linked to fewer inflammatory blood cells in small T2D study
Issue of 28 September 2026
What happened last week.
- Longevity Semaglutide linked to fewer inflammatory blood cells in small T2D study
A study of 16 adults with type 2 diabetes found that six months on semaglutide was associated with a measurable drop in a type of inflammatory immune cell circulating in the blood. The finding, published in the European Heart Journal, hints at one possible mechanism behind the drug's known cardiovascular benefits. The sample is small and the word 'potentially' is doing real work here.
- Biohacking AI tool and fruit fly experiments link BRSK1 gene variants to rare brain disorder
Researchers at Baylor College of Medicine and Texas Children's Hospital used an artificial intelligence tool and fruit fly models to connect mutations in the BRSK1 gene to a previously undiagnosed neurodevelopmental condition. The work, published in the American Journal of Human Genetics, gave 10 patients across seven families a diagnosis that standard genetic testing had failed to provide. The findings are preclinical in the sense that they explain a mechanism, not that they offer a treatment.
- Regenerative A muscle-support cell's death triggers inflammation and rapid atrophy in mice
Researchers found that wiping out a population of connective-tissue cells called fibro-adipogenic progenitors caused mice to lose 30% of their lean mass, driven by a surge in inflammatory signalling rather than nerve damage. The study, published in the Journal of Cachexia, Sarcopenia and Muscle, identifies a specific chemical pathway that, when blocked, partially restored muscle mass. The work is entirely in mice and has not been tested in people.
- Longevity New sleep drugs not linked to falls or fractures in insomnia patients
A meta-analysis published in the Journal of the American Geriatrics Society found no clear association between a newer class of sleep drugs and increased odds of falls or fractures in adults with insomnia. The finding matters because older sleep medications carry well-documented fall risks, and these newer drugs are increasingly seen as an alternative. The researchers caution that the evidence is limited and of only moderate certainty.
- Regenerative Fat cell study finds insulin receptor patterns differ by body location
A laboratory study published in the journal Obesity (Silver Spring, Md.) found that stem cells taken from subcutaneous fat (just under the skin) and visceral fat (around the organs) behave differently as they mature into fat cells, with distinct patterns in how they express the insulin receptor. The finding, made in human cell cultures, raises questions about why fat stored in different parts of the body carries different metabolic risks, but it does not yet answer them.
- Regenerative Mouse study links autism blood-vessel defect to a receptor that can be switched on
Researchers at The Ottawa Hospital and the University of Ottawa found that endothelial cells lining brain blood vessels in a genetic mouse model of autism carry half the normal level of a key energy molecule, slowing blood flow and producing behavioural symptoms. Activating a surface receptor called P2Y2 restored blood flow and reversed those symptoms in adult mice. The finding is preclinical, it has not been tested in people, but a drug that targets the same receptor is already approved for human use in Japan and South Korea for an unrelated condition.
- Longevity Blood proteins and epigenetic clocks both predict death risk, but brain measures edge ahead
A study of 861 older Scottish adults tracked over 16 years found that established biological markers, including an epigenetic clock, brain volume and lung function, predicted all-cause mortality at least as well as newer protein-based organ-age scores. Among nearly 10,000 blood proteins tested separately, three stood out as the strongest individual signals. The findings, published in the journal Aging Cell, offer the most systematic head-to-head comparison of these two approaches to date.
- Performance Vitamin D slowed muscle loss after spinal cord injury in mice
A study published in the Journal of Cachexia, Sarcopenia and Muscle found that daily vitamin D supplementation significantly reduced skeletal muscle wasting in mice after spinal cord injury. The researchers also measured a correlation between vitamin D levels and muscle mass in spinal cord injury patients, though the animal work is the core finding. No human trial has yet tested whether the treatment works in people.
- Performance Reading an opponent's body: what 40 studies say about motion-perception training
A scoping review in Sports Medicine examined 40 studies on point-light display training, a technique that strips a moving body down to dots of light on the joints, and found consistent evidence that athletes who train with it anticipate opponents' actions faster. The research is almost entirely lab-based, and whether the gains transfer to real competition remains an open question.
- Regenerative The strongest peptide binder is not always the best drug candidate
Drug hunters have long optimised peptides, short chains of amino acids used as potential medicines, for how tightly they grip a target protein. A commentary in Genetic Engineering and Biotechnology News argues that binding strength alone is a poor guide, and that screens designed to capture stability, cell entry and selectivity from the start produce more useful science. The piece draws on a 2026 study of more than 15,000 cyclic peptides to make the case.