The HSP expression of passive repetitive plyometric trained skeletal muscle

Cheng Chen Hsu, Mei Chich Hsu, Mao Shung Huang, Chuan Show Chen, Tzyy Yuang Shiang, Chiou Huey Wang, Tzuping Chen, Borcherng Su*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


This study aims to understand the effect of ten-week passive repetitive plyometric (PRP) training on human skeletal muscle and the application of PRP training for performance. Vastus lateralis of nine candidates were aspirated before (pre) and after (post) PRP training. Histochemical approaches with regular hematoxylene-eosin (HE) and Mallory's phosphotungstic acid hematoxylin (PTAH) stains were used to demonstrate the changes of muscle fibers. Immunohistochemical studies with heat shock protein (anti-hsp72, Stressgen, Canada) were employed to display cellular activities. Each set of slides was quantitatively analyzed by using a modified morphometric method (Russ and Dehoff, 1999) on a Nikon ECLIPSE 80i microscope, equipped with an Evolution VF COOLED color video camera, and the Image-Pro Plus software (5.0 for Win; Media Cybernetics, USA). Finally, hsp72 mRNAs of both pre-PRP and post-PRP specimens were amplified through RT-PCR. Signal intensities were read by a densitometer and analyzed through the SPSS (11.0 for Win) statistically. Post-PRP muscle cells demonstrated hypertrophic change with increased cellular content and a narrowed inter-cellular space according to both HE and PTAH profiles. Post-PRP cellular hsp72 proteins were higher by up to five percent, as measured by a gray-scale reading. Further, after a training period of 10 weeks, hsp72 mRNA expression was several times higher.

Original languageEnglish
Pages (from-to)91-103
Number of pages13
JournalResearch Communications in Molecular Pathology and Pharmacology
Publication statusPublished - 2005
Externally publishedYes


  • Heat shock protein (hsp72)
  • Passive repetitive plyometric (PRP)
  • Skeletal muscle

ASJC Scopus subject areas

  • Molecular Medicine
  • Pharmacology


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