[Appearance of proliferative activity in peritoneal macrophages cultured in vitro. Mitotic index values and percent frequency of frequency of mitosis phase]. / Sulla comparsa di attività riproduttiva nei macrofagi peritoneali coltivati in vitro. Indici mitotici e frequenza delle fasi mitotiche.

In vitro culture of rat peritoneal macrophages, cells generally considered devoid of proliferative activity, was found to lead to the appearance of mitosis. Mitotic index and percent phase incidence values were determined for these cells.

[Appearance of proliferative activity in peritoneal macrophages cultured in vitro. Stathmokinetic index and proliferative volume]. / L'attività riproduttiva dei macrofagi peritoneali in vitro. Indici statmocinetici e gettito proliferativo.

In the course of further studies of mitotic activity in vitro cultures of rat peritoneal macrophages, an increment in proliferative volume between the 2nd and 6th day was observed, followed by a decrease. The relationships between these variations and those of the mitotic index (previously reported) are discussed.

[Appearance of proliferative activity in peritoneal macrophages cultured in vitro. Karyokinetic chronology and phases]. / Attività mitotica dei macrofagi peritoneali del ratto. Cronologia della cariogenesi e delle sue fasi.

Contrast phase microscopy was employed to determine mitosis phase duration values in rat peritoneal macrophages in which proliferative activity had appeared following culture in vitro. Mitosis duration values were considerable and tended to increase in function of increases in culture time. These data are discussed in a general account of in vitro reproductive activity in peritoneal macrophages.