Medical research

Stem cell transplant slows progression of multiple sclerosis

(HealthDay)—For patients with relapsing-remitting multiple sclerosis (MS), nonmyeloablative hematopoietic stem cell transplantation (HCST) is associated with prolonged time to disease progression compared with disease-modifying ...

Medical research

Scientists have identified a bone marrow backup system

New research from the Stowers Institute for Medical Research has identified the backup for an important biological system—the hematopoietic system, whose adult stem cells constantly replenish the body's blood supply.

Medical research

Cohesin down-regulation drives hematopoietic stem cell aging

Aging is characterized by increases in inflammation and decreases in stem cell function. The relationship between these processes remains incompletely understood. Researchers of the Leibniz Institute on Aging (FLI) in Jena, ...

Medical research

Some blood cells have a surprising source—your gut

The human intestine may provide up to 10 percent of blood cells in circulation from its own reservoir of blood-forming stem cells, a surprising new study from researchers at Columbia University Vagelos College of Physicians ...

Medical research

Gene therapy for blood disorders

Gene therapy holds a lot of promise in medicine. If we could safely alter our own DNA, we might eliminate diseases our ancestors passed down to us.

Medical research

Helping blood cells regenerate after radiation therapy

Patients with blood cancers such as leukemia and lymphoma are often treated by irradiating their bone marrow to destroy the diseased cells. After the treatment, patients are vulnerable to infection and fatigue until new blood ...

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Hematopoietic stem cell

Hematopoietic stem cells (HSCs) are multipotent stem cells that give rise to all the blood cell types including myeloid (monocytes and macrophages, neutrophils, basophils, eosinophils, erythrocytes, megakaryocytes/platelets, dendritic cells), and lymphoid lineages (T-cells, B-cells, NK-cells). The definition of hematopoietic stem cells has undergone considerable revision in the last two decades. The hematopoietic tissue contains cells with long-term and short-term regeneration capacities and committed multipotent, oligopotent, and unipotent progenitors. Recently, long-term transplantation experiments point toward a clonal diversity model of hematopoietic stem cells. Here, the HSC compartment consists of a fixed number of different types of HSC, each with epigenetically preprogrammed behavior. This contradicts older models of HSC behavior, which postulated a single type of HSC that can be continuously molded into different subtypes of HSCs. HSCs constitute 1:10.000 of cells in myeloid tissue.

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