Jcbv AHA honors Ruhul Abid s research
No other stem cell is more thoroughly understood than the blood, or hematopoietic, stem cell. These occasional and rare cells, scattered sparingly throughout the marrow and capable of replenishing an entire blood system, have been the driving force behind successful bone marrow transplants for decades. Scientists, for the most part, have seen t
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his as the hematopoietic stem cell s HSC singular role: to remain in the bone marrow indefinitely and to replenish blood and immune system cells only when called upon.New research from the lab of Harvard Medical School professor of pathology Ulrich von Andrian, published in the Nov. 30 issue of Cell, now suggests that HSCs
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biological role is far more versatile and dynamic. Von Andrian and his
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colleagues have found that HSCs can travel from the bone marrow, through the blood system, and enter visceral organs where they perform reconnaissance missions in search of pathogenic invaders. Upon encountering an invader they immediately synthesize a de Xpzh Eggs, nests make colorful bedfellows at HMNH
The Dialogue on Voluntary Repatriation and Sustainable Reintegration in Africa will bring
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together key ministers, donor governments and other partners at the UN headquarters in Geneva, Switzerland, to discuss peace processes and refugee problems, the Office of the UN High Commissioner on Refugees UNHCR said. While we of
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ten cite our concerns about sp
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ecific refugee problems in Africa, UNHCR believes there is now cause for cautious optimism about resolving some of the most protracted refugee and displacement situations on the continent, UNHCR spokesman Ron Redmond said.For the first time, he said, the Office sees multiple possibilities for the potential repatriation of up to 2 million refugees. Thanks to greater stability or progress in peace processes, returns are already occurring in Angola, Sierra Leone, Liberia, Sudan, Eritrea, Somalia, Burundi, Rwanda and the Democratic Republic of the Congo DRC . These countries account for more than 5 million refugees and internally displaced