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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Sites and trend of erythropoiesis in anemic, normal, and splenectomized newts.

Newts, Triturus cristatus carnifex (Laurenti), were anesthetized by submersion in 2% chlorbutol in tap water for 15 min, splenectomized and then rendered totally anemic two months later by treatment with acetylphenylhydrazine (APH) diluted in their tanks (25 mg/liter for 36 h, changing the solution every 12 h). In the 14 weeks following hemolysis, erythron restoration occurred with the same intermittence as it did in whole animals rendered anemic by APH treatment: Beginning the second week the red blood cell count progressively increases for about one month, followed by a period of stasis which lasts about three weeks, then by a new increase, and then by a final period of stasis. Histological examination shows that erythropoietic activity occurs partly in the circulating blood and partly in erythroblasts nestled in the crypts between the muscular trabeculae of the ventricle as well as in the atrial walls. These cells, which are not part of the freely circulating elements in the blood stream, become very abundant in both whole and splenectomized anemic newts but are also present in normal animals. Newts, thus, have three sites for erythropoiesis: the spleen, the blood stream, and the heart. The other components compensate for the elimination of the spleen without determining any lack of, or delay in, erythropoietic response.[1]

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