[Establishment of primary culture of cells derived from uterine leiomyoma].

To evaluate the effects of drugs on uterine leiomyoma and to clarify the histogenesis of uterine leiomyoma, we studied the establishment of primary culture of cells derived from uterine leiomyoma. Myoma tissues were cut into small pieces and suspended in trypsin. The primary cell culture, as a monolayer, was able to be passaged four times. To confirm that the cultured cells were derived from the myoma, the cells were stained with desmin by the enzyme-labelled antibody method. The cultured cells derived from uterine muscle cells were similarly treated with desmin staining. The results confirmed the morphological similarity between the two groups of cells. To confirm that the cultured cells were myoblast, fibroblasts derived from the myoma were cultured selectively. The cells that resembled myoblasts, morphologically appeared spindle-shaped. The cells that resembled fibroblast, appeared polygonal and extended over the bottom of the culture flask. The growth curve of cultured myoma cells (8.0 X 10(4) cells in 0.2 ml) in Petri dishes (60 X 15 mm) revealed logarithmic proliferation after about 5 days. The colony formation of cultured myoma cells (2 X 10(5) cells in 0.2 ml) in culture flasks (25 cm2 in the area of the base) morphologically appeared to have an irregular border and had many independent scattered cells around the colony when the medium was renewed twice a week. The myoma cells (8.8 X 10(4) in 0.2 ml) in the logarithmic phase were cultured, fixed after 12 days when the medium was not renewed, and stained with crystal-violet. Morphologically, the colony had a comparatively regular border, was round, and each cell in the colony was epithelioid. The plating efficiency was 0.07%.(ABSTRACT TRUNCATED AT 250 WORDS)