Variability in skeletal muscle fibre characteristics during repeated muscle biopsy sampling in human vastus lateralis

Joshua P. Nederveen, George Ibrahim, Stephen A. Fortino, Tim Snijders, Dinesh Kumbhare, Gianni Parise*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

9 Citations (Web of Science)

Abstract

The percutaneous muscle biopsy procedure is an invaluable tool for characterizing skeletal muscle and capillarization. Little is known about methodological or biological variation stemming from the technique in heterogeneous muscle. Five muscle biopsies were taken from the vastus lateralis of a group of young men (n = 29, 22 +/- 1 years) over a 96-h period. We investigated the repeatability of fibre distribution, indices of muscle capillarization and perfusion, and myofibre characteristics. No differences between the biopsies were reported in myofibre type distribution, cross-sectional area (CSA), and perimeter. Capillary-to-fibre perimeter exchange index and individual capillary-fibre contacts were unchanged with respect to the location of the muscle biopsy and index of capillarization. The variability in the sampling distribution of fibre type specific muscle CSA increased when fewer than 150 muscle fibres were quantified. Variability in fibre type distribution increased when fewer than 150 muscle fibres were quantified. Myofibre characteristics and indices of capillarization are largely consistent throughout the vastus lateralis when assessed via the skeletal muscle biopsy technique.

Novelty

Markers of muscle capillarization and perfusion were unchanged across multiple sites of the human vastus lateralis.

Myofibre characteristics such as muscle cross-sectional area, perimeter, and fibre type distribution were also unchanged.

Variation of muscle CSA was higher when fewer than 150 muscle fibres were quantified.

Original languageEnglish
Pages (from-to)368-375
Number of pages8
JournalApplied Physiology Nutrition and Metabolism-Physiologie appliquee nutrition et metabolisme
Volume45
Issue number4
DOIs
Publication statusPublished - Apr 2020

Keywords

  • muscle biopsy
  • skeletal muscle fibre
  • capillarization
  • myosin
  • fibre type
  • cross-sectional area
  • capillary
  • SATELLITE CELL CONTENT
  • RESISTANCE
  • EXERCISE
  • SIZE
  • AREA
  • CAPILLARIZATION
  • HYPERTROPHY
  • ACTIVATION
  • INCREASES
  • ERRORS

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