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. 1990 May;87(9):3498–3502. doi: 10.1073/pnas.87.9.3498

Mitogenic activity from trout embryos.

P Collodi 1, D W Barnes 1
PMCID: PMC53928  PMID: 2333296

Abstract

An extract of 21-day rainbow trout embryos stimulated growth of several piscine cell lines in the absence of added serum. Established lines from trout (RTG-2 and STE-137), salmon (CHSE-214), carp (EPC), and goldfish (CAR) and early-passage cells initiated from trout embryos grew in serum-free medium containing the embryo extract. In addition the extract was sufficient for maintaining long-term cultures of CHSE-214 cells for several months through a minimum of 20 passages (approximately 50 population doublings) in the absence of serum. Optimal response was achieved with 100 micrograms of extract protein per ml, but a significant growth-promoting effect was observed with as little as 2.5 micrograms/ml. The activity was nondialyzable, protease-sensitive, and stable in 200 mM acetic acid. The level of mitogenic response induced by the extract could not be duplicated with purified mammalian growth factors added individually or in combination, and the extract did not stimulate DNA synthesis in quiescent mouse fibroblasts. These results suggest that trout embryo extract may contain a novel growth-promoting activity for fish cells.

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Selected References

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