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Sarcomeric TPM3α in developing chicken.

Syamalima Dube1, Lynn Abbott1, Samender Randhawa1

  • 1Department of Medicine, SUNY Upstate Medical University, 750 East Adams Street, Syracuse, New York 13210.

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|December 9, 2017
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Summary
This summary is machine-generated.

Chicken TPM3α gene expression is highest in embryonic skeletal muscle and barely detectable in adults. This study provides the first molecular characterization of this sarcomeric tropomyosin isoform in developing and adult chickens.

Keywords:
TPM3αTPM3νdevelopmentally regulatedqRT-PCR

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Area of Science:

  • Molecular Biology
  • Genetics
  • Developmental Biology

Background:

  • Tropomyosin (TPM) isoforms play crucial roles in muscle function.
  • While various chicken tropomyosin isoforms have been studied, the sarcomeric TPM3 gene's expression in developing and adult cardiac and skeletal muscles remained uncharacterized.

Purpose of the Study:

  • To perform the first molecular characterization and expression analysis of the TPM3α sarcomeric isoform in chicken cardiac and skeletal muscles.
  • To investigate the developmental expression pattern of TPM3α.

Main Methods:

  • Conventional Reverse Transcription Polymerase Chain Reaction (RT-PCR)
  • Quantitative Reverse Transcription Polymerase Chain Reaction (qRT-PCR) using relative (ΔCT, ΔΔCT) and absolute copy number methods
  • Analysis of TPM3α expression in embryonic and adult chicken cardiac and skeletal muscle tissues.

Main Results:

  • TPM3α expression was found to be maximal in embryonic skeletal muscle (10- and 15-day-old embryos).
  • TPM3α expression was barely detectable in both cardiac and adult skeletal muscles.
  • Expression levels suggest regulation at the transcriptional level via the proximal promoter of the TPM3 gene.

Conclusions:

  • The TPM3α isoform exhibits a distinct developmental expression pattern, predominantly in embryonic skeletal muscle.
  • High molecular weight TPM3 isoforms appear to be transcriptionally regulated.
  • This study establishes a foundation for understanding TPM3α function in chicken muscle development.