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Zymographic and ultrastructural evaluations after low-level laser irradiation on masseter muscle of HRS/J strain mice

Overview of attention for article published in Lasers in Medical Science, July 2012
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Title
Zymographic and ultrastructural evaluations after low-level laser irradiation on masseter muscle of HRS/J strain mice
Published in
Lasers in Medical Science, July 2012
DOI 10.1007/s10103-012-1156-6
Pubmed ID
Authors

Mamie Mizusaki Iyomasa, Elen Camargo Rizzi, Juliane Caroline Leão, João Paulo Mardegan Issa, Fernando José Dias, Yamba Carla Lara Pereira, Maria José Vieira Fonseca, Fabiana Testa Moura de Carvalho Vicentini, Ii-sei Watanabe

Abstract

Low-level laser therapy (LLLT) has been widely used in the treatment of the stomatognathic system dysfunction; however, its biological effect remains poorly understood. This study evaluated the effect of LLLT (GaAlAs, 780 nm, 20 J/cm(2), 40 mW) on masseter muscle of HRS/J mice after different numbers of laser irradiations (three, six, and ten) for 20 s in alternate days. Three experimental groups were defined according to the number of laser irradiations and three control groups (n=5) were used. On the third day after the last irradiation, all animals were killed and the masseter muscle was removed and processed for the following analysis: (a) transmission electron microscopy, (b) zymography, (c) immunohistochemistry for vascular endothelial growth factor (VEGF) and VEGFR-2. The results showed: (a) with six laser applications, a dilation of T tubules, and sarcoplasmic reticulum cistern, increased pinocytosed vesicles in the endothelium; with ten laser applications, few pinocytic vesicles in the endothelium and condensed mitochondria. (b) Under the conditions of this study, the synthesis of other matrix metalloproteinases was not observed, only the MMP-2 and -9. (c) After ten laser irradiations, immunostaining was observed only for VEGFR-2. We conclude that after six laser applications, ultrastructural changes may facilitate the Ca(+2) transfer to cytosol and increase the fluid transport from one surface to another. The ultrastructural changes and no immunostaining for VEGF with ten applications may decrease the metabolic activity as well as damage the angiogenic process, suggesting that an effective number of laser applications may be less than ten, associating to this therapy a better cost-benefit.

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Mendeley readers

Mendeley readers

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Geographical breakdown

Country Count As %
Unknown 26 100%

Demographic breakdown

Readers by professional status Count As %
Student > Master 5 19%
Student > Bachelor 3 12%
Student > Doctoral Student 3 12%
Researcher 3 12%
Student > Ph. D. Student 2 8%
Other 4 15%
Unknown 6 23%
Readers by discipline Count As %
Medicine and Dentistry 10 38%
Nursing and Health Professions 2 8%
Biochemistry, Genetics and Molecular Biology 1 4%
Agricultural and Biological Sciences 1 4%
Pharmacology, Toxicology and Pharmaceutical Science 1 4%
Other 4 15%
Unknown 7 27%
Attention Score in Context

Attention Score in Context

This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 17 July 2012.
All research outputs
#20,161,674
of 22,671,366 outputs
Outputs from Lasers in Medical Science
#1,073
of 1,303 outputs
Outputs of similar age
#148,119
of 164,532 outputs
Outputs of similar age from Lasers in Medical Science
#20
of 24 outputs
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So far Altmetric has tracked 1,303 research outputs from this source. They receive a mean Attention Score of 3.0. This one is in the 1st percentile – i.e., 1% of its peers scored the same or lower than it.
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We're also able to compare this research output to 24 others from the same source and published within six weeks on either side of this one. This one is in the 1st percentile – i.e., 1% of its contemporaries scored the same or lower than it.