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. 1983 Jan;3(1):132–142. doi: 10.1128/mcb.3.1.132

Cytochalasin D induces increased actin synthesis in HEp-2 cells.

J Tannenbaum, G C Godman
PMCID: PMC368510  PMID: 6681859

Abstract

In HEp-2 cells treated with 0.2 to 2.0 microM cytochalasin D (CD) for 7.5 to 24 h there was a 20 to 50% relative increase in actin content (units of actin per microgram of total cell protein). This augmentation, which was concentration and time dependent, was prevented by treatment with cycloheximide during exposure to CD. A 15 to 20% increase in the relative rate of actin synthesis in CD-treated HEp-2 cells (0.2 to 2.0 microM CD) was detectable after 1 h of treatment and increased to 30 to 50% by 24 h. This increased rate of actin synthesis was apparently responsible for the higher actin content of CD-treated HEp-2 cells. The concentration dependence of these effects of CD on actin metabolism correlated with the pattern seen for CD-triggered changes in cellular morphology and the underlying rearrangements of the actin-containing cytoskeletal structures, suggesting that the effects on metabolism and morphology were interrelated. Since the rapidly occurring cytoskeletal reorganization preceded the effects of CD on actin metabolism, it is proposed that actin synthesis is induced by the cytoskeletal rearrangement resulting from exposure to CD.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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