Human lung tissue as a source of colony stimulating activity
- 1 August 1978
- journal article
- research article
- Published by Springer Nature in Annals of Hematology
- Vol. 37 (2) , 69-74
- https://doi.org/10.1007/bf01002104
Abstract
Medium, welches durch menschliches Lungengewebe konditioniert wird, enthält kolonienstimulierende Aktivität (= Colony Stimulating Activity, CSA). Diese Präparation wurde an Menschen- und Mäuseknochenmark getestet. Kolonienbildende Einheiten von beiden Species wurden in Agarkulturen zu klonalem Wachstum aktiviert. Es zeigte sich eine sigmoide Dosisabhängigkeit des Wachtums der CFUc von der Konzentration an lungenkonditioniertem Medium. Die Molekulargewichtsbestimmung der kolonienstimulierenden Faktoren in Lungenmedium ergab vier Molekulargewichtsfraktionen, nämlich mit annähernd 79000,40000,23000und 2000 Daltons. Die 23 000 Dalton-Fraktion aktivierte ausschließlich menschliche Zellen, die übrigen Fraktionen aktivierten Menschen- und Mäuseknochenmarkzellen. Medium conditioned by human lung tissue was found to contain colony stimulating activity (CSA). This material was tested against mouse and human bone marrow as target system. Colony forming units (CFUc)from both species responded and gave rise to clonal growth in agar cultures. This colony formation was dose dependent and the relationship was a sigmoid one. Experiments to determine the molecular weight of human lung derived colony stimulating Factors brought evidence for four active molecular weight fractions with approximately 79000, 40000, 23000 and 2000 daltons. The 23000 dalton fraction activated human cells only, whereas the other fractions were active on both human and mouse bone marrow cells.This publication has 25 references indexed in Scilit:
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