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Review

Photobiomodulation Therapy and the Glymphatic System: Promising Applications for Augmenting the Brain Lymphatic Drainage System

1
College for Light Medicine and Photobiomodulation, D-82319 Starnberg, Germany
2
ProNeuroLIGHT LLC, Phoenix, AZ 85041, USA
3
Neurosciences Research Center (NSRC), Tabriz University of Medical Sciences, Tabriz 51666, Iran
4
Department of Neurology, University of New Mexico School of Medicine, Albuquerque, NM 87131, USA
*
Author to whom correspondence should be addressed.
Int. J. Mol. Sci. 2022, 23(6), 2975; https://doi.org/10.3390/ijms23062975
Submission received: 28 December 2021 / Revised: 21 January 2022 / Accepted: 22 January 2022 / Published: 10 March 2022
(This article belongs to the Special Issue Materials for Photobiology)

Abstract

The glymphatic system is a glial-dependent waste clearance pathway in the central nervous system, devoted to drain away waste metabolic products and soluble proteins such as amyloid-beta. An impaired brain glymphatic system can increase the incidence of neurovascular, neuroinflammatory, and neurodegenerative diseases. Photobiomodulation (PBM) therapy can serve as a non-invasive neuroprotective strategy for maintaining and optimizing effective brain waste clearance. In this review, we discuss the crucial role of the glymphatic drainage system in removing toxins and waste metabolites from the brain. We review recent animal research on the neurotherapeutic benefits of PBM therapy on glymphatic drainage and clearance. We also highlight cellular mechanisms of PBM on the cerebral glymphatic system. Animal research has shed light on the beneficial effects of PBM on the cerebral drainage system through the clearance of amyloid-beta via meningeal lymphatic vessels. Finally, PBM-mediated increase in the blood–brain barrier permeability with a subsequent rise in Aβ clearance from PBM-induced relaxation of lymphatic vessels via a vasodilation process will be discussed. We conclude that PBM promotion of cranial and extracranial lymphatic system function might be a promising strategy for the treatment of brain diseases associated with cerebrospinal fluid outflow abnormality.
Keywords: photobiomodulation; near-infrared light; glymphatic system; meningeal lymphatic vessels; amyloid-beta; neurodegenerative diseases; Alzheimer’s disease; Parkinson’s disease photobiomodulation; near-infrared light; glymphatic system; meningeal lymphatic vessels; amyloid-beta; neurodegenerative diseases; Alzheimer’s disease; Parkinson’s disease

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MDPI and ACS Style

Salehpour, F.; Khademi, M.; Bragin, D.E.; DiDuro, J.O. Photobiomodulation Therapy and the Glymphatic System: Promising Applications for Augmenting the Brain Lymphatic Drainage System. Int. J. Mol. Sci. 2022, 23, 2975. https://doi.org/10.3390/ijms23062975

AMA Style

Salehpour F, Khademi M, Bragin DE, DiDuro JO. Photobiomodulation Therapy and the Glymphatic System: Promising Applications for Augmenting the Brain Lymphatic Drainage System. International Journal of Molecular Sciences. 2022; 23(6):2975. https://doi.org/10.3390/ijms23062975

Chicago/Turabian Style

Salehpour, Farzad, Mahsa Khademi, Denis E. Bragin, and Joseph O. DiDuro. 2022. "Photobiomodulation Therapy and the Glymphatic System: Promising Applications for Augmenting the Brain Lymphatic Drainage System" International Journal of Molecular Sciences 23, no. 6: 2975. https://doi.org/10.3390/ijms23062975

APA Style

Salehpour, F., Khademi, M., Bragin, D. E., & DiDuro, J. O. (2022). Photobiomodulation Therapy and the Glymphatic System: Promising Applications for Augmenting the Brain Lymphatic Drainage System. International Journal of Molecular Sciences, 23(6), 2975. https://doi.org/10.3390/ijms23062975

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