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Exploring the ability of low-level laser irradiation to reduce myonecrosis and increase Myogenin transcription after Bothrops jararacussu envenomation
Envenoming caused by snakebites is a very important neglected tropical disease worldwide. The myotoxic phospholipases present in the bothropic venom disrupt the sarcolemma and compromise the mechanisms of energy production, leading to myonecrosis. Photobiomodulation therapy (PBMT) has been used as a...
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Published in: | Photochemical & photobiological sciences 2021-04, Vol.20 (4), p.571-583 |
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Main Authors: | , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | Envenoming caused by snakebites is a very important neglected tropical disease worldwide. The myotoxic phospholipases present in the bothropic venom disrupt the sarcolemma and compromise the mechanisms of energy production, leading to myonecrosis. Photobiomodulation therapy (PBMT) has been used as an effective tool to treat diverse cases of injuries, such as snake venom-induced myonecrosis. Based on that, the aim of this study was to analyze the effects of PBMT through low-level laser irradiation (904 nm) on the muscle regeneration after the myonecrosis induced by
Bothrops jararacussu
snake venom (
Bjssu
) injection, focusing on myogenic regulatory factors expression, such as
Pax7
,
MyoD
, and
Myogenin
(
MyoG
). Male Swiss mice (
Mus musculus
), 6–8-week-old, weighing 22 ± 3 g were used. Single sub-lethal
Bjssu
dose or saline was injected into the right mice gastrocnemius muscle. At 3, 24, 48, and 72 h after injections, mice were submitted to PBMT treatment. When finished the periods of 48 and 72 h, mice were euthanized and the right gastrocnemius were collected for analyses. We observed extensive inflammatory infiltrate in all the groups submitted to
Bjssu
injections. PBMT was able to reduce the myonecrotic area at 48 and 72 h after envenomation. There was a significant increase of
MyoG
mRNA expression at 72 h after venom injection. The data suggest that beyond the protective effect promoted by PBMT against
Bjssu
-induced myonecrosis, the low-level laser irradiation was able to stimulate the satellite cells, thus enhancing the muscle repair by improving myogenic differentiation. |
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ISSN: | 1474-905X 1474-9092 |
DOI: | 10.1007/s43630-021-00041-x |