CHARACTERISTICS OF GROWTH OF SARCOMA AND CARCINOMA CULTIVATED IN VITRO

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Abstract
1. The transplantable sarcomata of rats and mice grow very readily by the method of cultivating tissues in vitro. 2. Sarcomatous tissue grows in conformity to a type which may be regarded as characteristic for tissues of mesenchymal origin. 3. The growth of sarcoma cells in vitro consists in ameboid wandering into the surrounding plasma, karyokinetic proliferation. and evidences of active metabolism on the part of the cells. 4. Mouse carcinomata can be cultivated in vitro. The outgrowth of carcinoma cells assumes a sheet-like form, only one cell in thickness. They migrate into the plasma by ameboid movement, the advancing edge showing numerous prolongations of the cytoplasm into pseudopods. 5. Karyokinetic figures are frequently seen in growing carcinoma cells. The cells show evidences of active metabolism. 6. Both sarcoma and carcinoma cells cultivated in vitro show active phagocytosis; carmin particles placed in the plasma are taken up rapidly by the growing cells.

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