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  • Title: [Granulocyte chalone: tissue specificity of action in short-term cultures].
    Author: Schunck H, Schütt M, Langen P.
    Journal: Acta Biol Med Ger; 1978; 37(4):593-600. PubMed ID: 153696.
    Abstract:
    Granulocytic chalone containing extracts were obtained by incubating rat bone marrow cells in Hanks salt solution and further purification of the conditioned medium by ultrafiltration and gel chromatography. These extracts cause specific inhibition of 3H-thymidine incorporation in short-term cultures of rat bone marrow and murine myeloic leukemias. Ehrlich ascites tumour, spleen (mouse), lymphatic leukemia L1210 and melanoma AMel 3 (hamster) are not influenced under identical experimental conditions. Comparing the action of cell proliferation inhibitors (chalones) from Ehrlich ascites tumour and spleen lymphocytes it was shown that inhibition of 3H-thymidine incorporation occurs only with those cells corresponding to the origin of the inhibitor. Therefore, the described short-term cultures seem to be suitable for testing the tissue specificity of action, as the main criterion for authenticity of the chalone effect, at least in the case of granulocytic chalone.
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