We have located links that may give you full text access.
Antinociceptive effects of low-level laser therapy at 3 and 8 j/cm 2 in a rat model of postoperative pain: possible role of endogenous Opioids.
Lasers in Surgery and Medicine 2017 November
Low-level laser therapy (LLLT) is the direct application of light to stimulate cell responses (photobiomodulation) to promote tissue healing, reduce inflammation, and induce analgesia; the molecular basis for these effects of LLLT remains unclear. The objective of this study was to evaluate the analgesic effect of LLLT in the rat plantar incision model of postoperative pain as well as to investigate some of the possible mechanisms involved in this effect. Wistar rats were submitted to plantar incision and treated with LLLT (830 nm, continuous-mode, 30 mW/cm2 , 1-12 J/cm2 ). Postoperative thermal and mechanical hypersensitivity were monitored for 24 hours post-incision. In addition, the animals were pretreated with saline, naloxone (a nonselective opioid receptor antagonist; 20 µg/5 µl) or methysergide (5-HT2C , 5-HT2A , 5-HT7 , 5-HT5a , 5-HT6, and 5-HT1F receptors antagonist; 30 µg/5 µl). Moreover, 24 hours after incision and treatment, the TNF-α and IL-1β levels in serum were evaluated. Our results demonstrate, for the first time, that LLLT at 3 or 8 J/cm2 , but not at 1-2, 4-7, or 9-12 J/cm2 , induced an analgesic effect on postoperative pain. Naloxone, but not methysergide, blocked the LLLT-induced anti-nociceptive effect. Additionally, IL-1-β and TNF-α production significantly decreased after LLLT at 3 or 8 J/cm2 . Our results suggest that LLLT at 3 or 8 J/cm2 primarily modulates the endogenous opioids system and is not directly mediated by serotonergic receptors. Reduction of IL-1β and TNF-α may play a role in the antinociceptive action of LLLT. Lasers Surg. Med. 49:844-851, 2017. © 2017 Wiley Periodicals, Inc.
Full text links
Related Resources
Trending Papers
Heart failure with preserved ejection fraction: diagnosis, risk assessment, and treatment.Clinical Research in Cardiology : Official Journal of the German Cardiac Society 2024 April 12
Proximal versus distal diuretics in congestive heart failure.Nephrology, Dialysis, Transplantation 2024 Februrary 30
Efficacy and safety of pharmacotherapy in chronic insomnia: A review of clinical guidelines and case reports.Mental Health Clinician 2023 October
World Health Organization and International Consensus Classification of eosinophilic disorders: 2024 update on diagnosis, risk stratification, and management.American Journal of Hematology 2024 March 30
Get seemless 1-tap access through your institution/university
For the best experience, use the Read mobile app
All material on this website is protected by copyright, Copyright © 1994-2024 by WebMD LLC.
This website also contains material copyrighted by 3rd parties.
By using this service, you agree to our terms of use and privacy policy.
Your Privacy Choices
You can now claim free CME credits for this literature searchClaim now
Get seemless 1-tap access through your institution/university
For the best experience, use the Read mobile app