A comparative molecular analysis of four rat smooth muscle cell lines

Research output: Contribution to journalArticle

73 Citations (Scopus)

Abstract

Transcriptional regulation of smooth muscle cell (SMC) differentiation is a rapidly growing area of interest that has relevance for understanding intimal disease. Despite the wealth of data accumulating in vitro, however, no study has compared the cell-specific marker profile, transfectability, promoter activity, and growth characteristics among several SMC culture systems. Accordingly, we performed a comprehensive analysis of the marker profile, growth properties, transfectability, and SMC promoter activity in four rat SMC lines (A7r5, adult and pup aortic, and PAC1). Despite alterations in chromosomal number and structure, A7r5, adult aortic, and PAC1 cells express all SMC markers studied including SM α-actin, SM calponin, SM22, tropoelastin, and to a lesser extent, SM myosin heavy chain (SMMHC). In contrast, pup aortic cells express very low or undetectable levels of all the above markers except tropoelastin. Adult aortic, pup, and PAC1 cells display similar growth curves and levels of proto-oncogene transcripts, whereas those in the A7r5 line are comparatively less. All cell lines studied except pup cells show expression of SMC differentiation genes during active growth, indicating that growth and differentiation are not mutually exclusive in cultured smooth muscle. Transfection studies reveal dramatic differences in DNA uptake and SMC-restricted promoter activity between cell lines. Collectively, these results provide detailed information relating to SMC molecular biology in culture that should facilitate the selection of a cell line for studying the transcriptional regulatory mechanisms underlying SMC differentiation.

Original languageEnglish (US)
Pages (from-to)217-226
Number of pages10
JournalIn Vitro Cellular and Developmental Biology - Animal
Volume34
Issue number3
StatePublished - 1998
Externally publishedYes

Fingerprint

Smooth Muscle Myocytes
Muscle
Rats
Cells
Cell Line
Tropoelastin
Growth
Cell Differentiation
Cell culture
Tunica Intima
Cytology
Proto-Oncogenes
Myosin Heavy Chains
Molecular biology
Transfection
Smooth Muscle
Cell Biology
Actins
Molecular Biology
Cell Culture Techniques

Keywords

  • Differentiation
  • Growth
  • Promoter
  • Tissue culture
  • Transfection

ASJC Scopus subject areas

  • Developmental Biology
  • Clinical Biochemistry
  • Cell Biology

Cite this

A comparative molecular analysis of four rat smooth muscle cell lines. / Firulli, Anthony.

In: In Vitro Cellular and Developmental Biology - Animal, Vol. 34, No. 3, 1998, p. 217-226.

Research output: Contribution to journalArticle

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