Effect of a hematopoietic promoting factor derived from porcine kidney on the proliferation of mouse hematopoietic progenitor cells in liquid culture.
We have partially purified a factor from porcine kidney, hematopoietic-promoting factor (HPF), which enhances granulocyte-macrophage colony-forming units (CFU-GM) and erythropoietic burst-forming unit (BFU-E) colony formation in the presence of various exogenous colony-stimulating factors (CSF) or erythropoietin (Epo) from mouse bone marrow cells. In this paper we examine the combined effects of HPF and/or stem cell factor (SCF) with interleukin-3 (IL-3) and interleukin-6 (IL-6) on the proliferation of primitive hemopoietic progenitor cells in liquid cultures for 7 or 14d. The combination of IL-3+IL-6+HPF could not increase the number of CFU-GM, BFU-E, and day-8 colony forming units in spleen (CFU-S) in cultures of unfractionated bone marrow cells, while this combination resulted in a marked increase of progenitors in cultures of c-kit+ enriched cells. In contrast, expansion of progenitors was observed by IL-3+IL-6+SCF or IL-3+IL-6+SCF+HPF in the culture of both unfractionated bone marrow cells and c-kit(+)-enriched cells after 7d. The number of CFU-GM and BFU-E in the combination of IL-3+IL-6+SCF+HPF for c-kit+ cells showed the largest increase, 109-fold and 38-fold respectively after 14d. These results show that HPF has promoting activity on hematopoietic stem cells and acts synergistically with SCF in early stages of hematopoiesis.
Kashiwakura
I
I
Hokkaido College of Pharmacy, Otaru, Japan.
Murakami
M
M
Hayase
Y
Y
Takagi
Y
Y
D000818:Animals; D001853:Bone Marrow / Q000187:drug effects / Q000378:metabolism; D001854:Bone Marrow Cells; D002455:Cell Division / Q000187:drug effects; D002478:Cells, Cultured; D003114:Colony-Forming Units Assay; D015672:Erythroid Precursor Cells / Q000166:cytology / Q000187:drug effects*; D006410:Hematopoiesis / Q000187:drug effects*; D016298:Hematopoietic Cell Growth Factors / Q000494:pharmacology*; D006801:Humans; D007377:Interleukin-3 / Q000494:pharmacology; D015850:Interleukin-6 / Q000494:pharmacology; D007668:Kidney / Q000737:chemistry* / Q000187:drug effects; D008297:Male; D051379:Mice; D008815:Mice, Inbred Strains; D019089:Stem Cell Factor / Q000494:pharmacology; D013552:Swine
D016298:Hematopoietic Cell Growth Factors; D007377:Interleukin-3; D015850:Interleukin-6; D019089:Stem Cell Factor