Transcription factors are present in fetal calf serum

P. A. Knepper, C. S K Mayanil, E. Hayes, Susan Lindemulder

Research output: Contribution to journalArticle

Abstract

Purpose. Successful cell cultures, particularly trabecular meshwork (TM) explants and TM cell cultures, frequently require the presence of fetal calf serum (FCS). Several commercially available FCS preparations were analyzed by hyaluronic acid (HA) affinity columns and Western blots to explore the possibility that transcription factors (TFs) are present in FCS. Methods. We selected a panel of commercially available antibodies - some directed against TFs and others against nuclear proteins - containing a consensus HA-binding motif of [R,H,K]-X(7)-[R,H,K] where X was any amino acid except D/E. FCS was applied to EAH-Sepharose-HA-affinity columns to obtain an enriched HA-binding protein fraction. The HA-bound proteins were eluted, fractionated by SDS polyacrylamide gel electrophoresis, transferred to Immobilon P, immunoblotted with antibodies and detected by enhanced chemiluminescence. Results. A partial list of immunopositive TFs includes E2F-1, ets-1/-2, GATA-2, TFIID, SRE/ZBP, as well as p53, Rb, and WT. Conclusions. The results indicate that FCS contains TFs. Notably, there are differences in the type and the amount of TFs from the different commercially available sources of FCS. Consequently, the source and the lot number of FCS may represent factors in successful cell culture. Secondly, HA may serve a role as a carrier of TFs to influence cell activity.

Original languageEnglish (US)
JournalInvestigative Ophthalmology and Visual Science
Volume37
Issue number3
StatePublished - Feb 15 1996
Externally publishedYes

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Transcription Factors
Hyaluronic Acid
Serum
Trabecular Meshwork
Cell Culture Techniques
E2F1 Transcription Factor
Transcription Factor TFIID
CD44 Antigens
Antibodies
Nuclear Proteins
Luminescence
Sepharose
Polyacrylamide Gel Electrophoresis
Western Blotting
Amino Acids
Proteins

ASJC Scopus subject areas

  • Ophthalmology

Cite this

Transcription factors are present in fetal calf serum. / Knepper, P. A.; Mayanil, C. S K; Hayes, E.; Lindemulder, Susan.

In: Investigative Ophthalmology and Visual Science, Vol. 37, No. 3, 15.02.1996.

Research output: Contribution to journalArticle

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