Centromeres play virtually the same central role across the entire tree of life: They ensure the faithful segregation of chromosomes during cell division. Yet the striking diversity in centromere architecture – from large, repeat-rich DNA arrays to the minimalistic “point” centromeres in yeast – combined with their rapid evolution has puzzled scientists for decades. A research team led by Andrea Musacchio, Director at the Max Planck Institute of Molecular Physiology in Dortmund, and Jef Boeke from the NYU Grossmann School of Medicine have now solved the enduring mystery about the yeast centromere’s origin and evolution. They have identified a “proto-point” centromere that bridges the gap between the actual tiny “point” centromere and its more elaborate ancestor that incorporated fragments of parasitic DNA. This discovery reveals one of the most dramatic evolutionary transitions at DNA level

Researchers at The Jackson Laboratory and the University of Pennsylvania found that endurance gains from exercise are driven not just by muscles, but by specific neurons in the brain’s hypothalamus. Reporting in Neuron, the team showed that mice lacking activity in these neurons failed to build endurance, even with intense training. Conversely, artificially activating the neurons after exercise enhanced endurance gains. The findings challenge the traditional view that muscle adaptation alone explains improved fitness, highlighting a critical brain–body connection in how exercise builds stamina.

UVA Health researchers have identified a group of nerve cells in the brainstem that act as a stabilizing system for blood pressure. The findings could open the door for new treatments to overcome harmful effects of short-term blood pressure fluctuations in patients whose blood pressure otherwise appears normal.

Researchers from the University of Southern Denmark and Odense University Hospital have discovered a previously undescribed virus in a common gut bacterium. The virus appears more frequently in patients with colorectal cancer.

Researchers at Amsterdam UMC have discovered that a second pregnancy alters the female brain. Previous research from the same group had already demonstrated the impact of a first pregnancy on the female brain. These results are published today in Nature Communications. The research demonstrates that both a first and a second pregnancy have a strong and unique impact on mothers’ brains.

A research team at the IPK Leibniz Institute has developed a method that enables the detailed observation of female meiosis - the process by which germ cells are formed - in the model plant Arabidopsis thaliana. The FeM-ID (Female Meiotic cell IDentification) method overcomes a significant hurdle in plant biology. Until now, female meiotic cells were difficult to access, forcing most studies to focus on male cells. The results of the study have now been published in the journal The Plant Cell.