[Effect of various serum fractions on L-cell differentiation]. / Vliianie razlichnykh syvorotochnykh fraktsii na differentsirovku kletok linii L.

It has been shown that the accumulation of lipids and maturation of L strain cells into mature lypocytes can be stimulated by high doses (30-60 mg/ml) of serum albumins, egg albumin lysozyme, and gelatin, or with low doses (200-600 mcg/ml) of serum globulins. The globulins are believed to induce differentiation of the L cell on depressing their proliferation. On the contrary, the low doses of albumins stimulate cell division without inducing differentiation.

[L line cell differentiation. Histochemical and electron microscopic studies]. / [Differentsirovka kletok linii L. Gistokhimicheskoe iélektronno-mikroskopicheskoe issledovaniia.

In a medium supplemented with 60 per cent large cattle serum, part of the cell population of L-transformed culture was seen to be differentiated into mature lipocytes. The formation of structures similar to normal fat tissue took place in the same conditions, provided a reduced quantity of the seeded cells was used. The cell differentiation was accompanied with a decrease in acid phosphatase and non-specific esterase activities. The ultrastructural study has demonstrated a suitable preservation of cytoplasmic structures and a domination of the rough cytoplasmic reticulum compared to the control cell cultures where free ribosomes and polysomes predominated.