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Published in: Lasers in Medical Science 4/2014

01-07-2014 | Original Article

Evaluating the effect of low-level laser therapy on healing of tentomized Achilles tendon in streptozotocin-induced diabetic rats by light microscopical and gene expression examinations

Authors: Morteza Aliodoust, Mohammad Bayat, Mohammad Reza Jalili, Zainalabedin Sharifian, Masoomeh Dadpay, Mohammad Akbari, Mehrnoush Bayat, Amir Khoshvaghti, Homa Bayat

Published in: Lasers in Medical Science | Issue 4/2014

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Abstract

Tendon healing is impaired in individuals diagnosed with diabetes mellitus (DM). According to research, there is considerable improvement in the healing of surgically tenotomized Achilles tendons following low-level laser therapy (LLLT) in non-diabetic, healthy animals. This study uses light microscopic (LM) and semi-quantitative reverse transcription PCR (RT-PCR) analyses to evaluate the ability of LLLT in healing Achilles tendons from streptozotocin-induced diabetic (STZ-D) rats. A total of 88 rats were randomly divided into two groups, non-diabetic and diabetic. DM was induced in the rats by injections of STZ. The right Achilles tendons of all rats were tenotomized 1 month after administration of STZ. Laser-treated rats were treated with a helium–neon (He–Ne) laser that had a 632.8-nm wavelength and 7.2-mW average power. Experimental group rats received a daily dose of 0.014 J (energy density, 2.9 J/cm2). Control rats did not receive LLLT. Animals were sacrificed on days 5, 10, and 15 post-operatively for semi-quantitative LM and semi-quantitative RT-PCR examinations of transforming growth factor-beta1 (TGF-β1) gene expression. The chi-square test showed that LLLT significantly reduced inflammation in non-diabetic rats compared with their non-diabetic controls (p = 0.02). LLLT significantly decreased inflammation in diabetic rats on days 5 (p = 0.03) and 10 (p = 0.02) compared to the corresponding control diabetic rats. According to the student’s t test, LLLT significantly increased TGF-β1 gene expression in healthy (p = 0.000) and diabetic (p = 0.000) rats compared to their relevant controls. The He–Ne laser was effective in altering the inflammatory reaction and increasing TGF-β1 gene production.
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Metadata
Title
Evaluating the effect of low-level laser therapy on healing of tentomized Achilles tendon in streptozotocin-induced diabetic rats by light microscopical and gene expression examinations
Authors
Morteza Aliodoust
Mohammad Bayat
Mohammad Reza Jalili
Zainalabedin Sharifian
Masoomeh Dadpay
Mohammad Akbari
Mehrnoush Bayat
Amir Khoshvaghti
Homa Bayat
Publication date
01-07-2014
Publisher
Springer London
Published in
Lasers in Medical Science / Issue 4/2014
Print ISSN: 0268-8921
Electronic ISSN: 1435-604X
DOI
https://doi.org/10.1007/s10103-014-1561-0

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