Vasopressin Stimulation of Acetate Incorporation into Lipids in a Dimethylbenz(a)anthracene induced Rat Mammary Tumor Cell Line

M. E. Monaco, M. E. Lippman, R. Knazek, W. R. Kidwell

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In a preliminary report we described the effects of rat prolactin on the incorporation of [14C]acetate into lipids by a cell line derived from a dimethylbenz(a)anthracene-induced rat mammary tumor. The characteristics of the response to prolactin were very similar to those described for the normal rat mammary gland; namely, insulin was required for full expression of the response, maximal activity was not seen until 36 hr after the addition of the hormones, and growth hormone was able to elicit the same response. However, we were unable to detect binding of 125I-labeled prolactin to these cells, and furthermore, other more purified prolactin preparations were inactive. Upon further investigation we discovered that the activity resided in a low-molecular-weight fraction of the rat prolactin B-1 preparation and was probably either vasopressin or oxytocin or both. These data suggest the possibility that vasopressin may play a role in rodent mammary tumorigenesis.

Original languageEnglish (US)
Pages (from-to)4101-4104
Number of pages4
JournalCancer Research
StatePublished - Nov 1978


ASJC Scopus subject areas

  • Oncology
  • Cancer Research

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