Rapamycin tagged posts

The effect of medicines on women and men can differ significantly. This also applies to the currently most promising anti-aging drug rapamycin, as researchers from the Max Planck Institute for Biology of Ageing in Cologne and University College London have now shown. They report in Nature Aging that the drug only prolongs the lifespan of female fruit flies, but not that of males.

In addition, rapamycin only slowed the development of age-related pathological changes in the gut in female flies. The researchers conclude that the biological sex is a crucial factor in the effectiveness of anti-aging drugs.

The life expectancy of women is significantly higher than that of men...

Imagine you could take a medicine that prevents the decline that come with age and keeps you healthy. Scientists are trying to find a drug that has these effects. The current most promising anti-ageing drug is Rapamycin, known for its positive effects on life and health span in experimental studies with laboratory animals. To obtain the maximum beneficial effects of the drug, it is often given lifelong. However, even at the low doses used in prevention for age-related decline, negative side effects may occur, and it is always desirable to use the lowest effective dose...

In new research, Aric N. Rogers, Ph.D., who studies the cellular and molecular mechanisms of aging at the MDI Biological Laboratory in Bar Harbor, Maine, has discovered that muscle may be a protected tissue under conditions of dietary restriction, or DR.

Dietary restriction, in which calories are restricted without malnutrition, is one of the most robust anti-aging interventions. When confronted with a scarcity of nutrients, an organism conserves resources by lowering the translation, or production, of proteins, which is one of the most energetically expensive processes in the cell. Proteins serve as the building blocks for tissues and organs and perform vital physiological functions.

The conservation of cellular resources through red...

MIT biologists have answered an important biological question: Why do cells control their size? Cells of the same type are strikingly uniform in size, while cell size differs between different cell types. This raises the question of whether cell size is important for cellular physiology.

The new study suggests that cellular enlargement drives a decline in function of stem cells. The researchers found that blood stem cells, which are among the smallest cells in the body, lose their ability to perform their normal function — replenishing the body’s blood cells — as they grow larger. However, when the cells were restored to their usual size, they behaved normally again.

The researchers also found that blood stem cells tend to enlarge as they age...