Scientists have discovered a potential reason behind hair graying by studying hair follicles in mice, which may eventually lead to ways to prevent or reverse the process. Hair turns gray due to a lack of specialized pigment-producing cells called melanocytes. However, it remains unclear why this shortage occurs and how to prevent it.
Low cholesterol in immune cells slows HIV progression – Scientists at the University of Pittsburgh have identified why some HIV-infected people experience much slower disease progression, even without medication, and it has to do with cholesterol levels in specific immune cells.
Mechanism Behind Blood Stem Cells’ Longevity Discovered – The blood stem cells that live in bone marrow are at the top of a complex family tree. Such stem cells split and divide down various pathways that ultimately produce red cells, white cells and platelets. These “daughter” cells must be produced at a rate of about one million per second to constantly replenish the body’s blood supply.
Stem cell transplant restores memory, learning in mice – A study at the University of Wisconsin-Madison is the first to show that human stem cells can successfully implant themselves in the brain and then heal neurological deficits, says senior author Su-Chun Zhang, a professor of neuroscience and neurology.
Omega-3 supplements may slow a biological effect of aging – Taking enough omega-3 fatty acid supplements to change the balance of oils in the diet could slow a key biological process linked to aging, new research suggests.
Single antibody shrinks variety of human tumors transplanted into mice, Stanford study shows – Human tumors transplanted into laboratory mice disappeared or shrank when scientists treated the animals with a single antibody. This antibody works by masking a protein flag on cancer cells that protects them from macrophages and other cells in the immune system.