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Effects of spaceflight on rat erythroid parameters

Allebban, Z., et al. (1996). "Effects of spaceflight on rat erythroid parameters." Journal of Applied Physiology 81 1: 117-22

Hematologic studies were performed on 21 ground control rats and 21 rats flown during the Spacelab Life Sciences-2 14-day mission. Group A (n = 5) was used to collect blood in flight and 9 days postflight, group B (n = 5) was injected with recombinant human erythropoietin (rhEpo), group C (n = 5) received saline as a control, and group D (n = 6) was killed in flight and tissues were collected. Results indicated no significant changes in peripheral blood erythroid elements between flight and ground control rats. The nonadherent bone marrow on flight day 13 showed a lower number of recombinant rat interleukin-3 (rrIL-3)-responsive and rrIL-3 + rhEpo-responsive blast-forming unit erythroid (BFU-e) colonies in flight rats compared with ground control rats. On landing day, a slight increase in the number of rhEpo + rrIL-3-responsive BFU-e colonies of flight animals compared with ground control rats was evident. Nine days postflight, bone marrow from flight rats stimulated with rhEpo alone or with rhEpo + rrIL-3 showed an increase in the number of colony-forming unit erythroid colonies and a decrease in BFU-e colonies compared with ground control rats. This is the first time that animals were injected with rhEpo and subsequently blood and tissues were collected during the spaceflight to study the regulation of erythropoiesis in microgravity.

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http://sfxhosted.exlibrisgroup.com/mayo?sid=OVID:medline&id=pmid:8828653&id=doi:&issn=8750-7587&isbn=&volume=81&issue=1&spage=117&pages=117-22&date=1996&title=Journal+of+Applied+Physiology&atitle=Effects+of+spaceflight+on+rat+erythroid+parameters.&aulast=Allebban&pid=%3Cauthor%3EAllebban+Z%3C%2Fauthor%3E&%3CAN%3E8828653%3C%2FAN%3E

ISSN: 8750-7587

Accession Number: 8828653

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Tags: *Erythropoiesis/ph [Physiology], Animals, Blood Cell Count, Body Weight/ph [Physiology], Bone Marrow Cells, Bone Marrow/ph [Physiology], Erythrocyte Count, Erythroid Precursor Cells/de [Drug Effects], Erythropoietin/ad [Administration & Dosage], Erythropoietin/me [Metabolism], Erythropoietin/pd [Pharmacology], Hematopoietic Stem Cells, Hemoglobins/me [Metabolism], Humans, Male, Rats, Recombinant Proteins, Reticulocyte Count, Space Flight, Sprague-Dawley