Rola P, Doroszko A, Szahidewicz-Krupska E, Rola P, Dobrowolski P, Skomro R, Szymczyszyn A, Mazur G, Derkacz A. Low-Level Laser Irradiation Exerts Antiaggregative Effect on Human Platelets Independently on the Nitric Oxide Metabolism and Release of Platelet Activation Markers.
OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2017;
2017:6201797. [PMID:
29379584 PMCID:
PMC5742893 DOI:
10.1155/2017/6201797]
[Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Accepted: 10/09/2017] [Indexed: 11/18/2022]
Abstract
AIM
The goal of the study is to develop a model allowing to investigate precisely the effect of low-level laser therapy (LLLT) on platelet aggregation and to verify the hypothesis regarding the role of the nitric oxide (NO) bioavailability and platelet activation markers in modulating platelet aggregation.
METHODS
A total of 41 healthy volunteers at the age of 21-45 years were investigated. At first, platelet aggregation in response to three agonists (TRAP, ADP, and collagen) was evaluated following previous exposure to different doses of laser radiation (λ = 662 nm) to assess the dose-response effect. Subsequently, plasma levels of platelet activation markers (PF4-platelet factor-4 and sP-selectin) as well as the substrate for nitric oxide synthase, L-arginine, and its competitive inhibitors (ADMA-asymmetric dimethylarginine and SDMA-symmetric dimethylarginine) were measured.
RESULTS
All doses of laser irradiation significantly reduced the aggregation. However, the most pronounced effect was observed for 19.7 J/cm2. No significant differences in the levels of platelet activation markers nor in the nitric-oxide-metabolic-pathway compounds between analyzed groups were noted.
CONCLUSIONS
We have demonstrated in the established in vitro experimental model that the LLLT in a reproducible manner decreases the whole blood platelet aggregation regardless of the NO bioavailability or changes in the platelet activation markers.
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