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・ Photopsia
・ Photopsin
・ PhotoRC RNA motifs
・ Photorealism
・ PhotoRec
・ Photoreceptor
・ Photoreceptor cell
・ Photoreceptor cell-specific nuclear receptor
・ Photoreceptor protein
・ Photorecording
・ Photoredox catalysis
・ Photoreflector
・ Photorefractive effect
・ Photorefractive keratectomy
・ Photorejuvenation
Photorelaxation
・ Photoresist
・ Photoresistor
・ Photorespiration
・ Photorhabdus
・ Photorhabdus luminescens
・ Photorhabdus temperata
・ Photorhizobium thompsonianum
・ Photos (application)
・ Photos of Ghosts
・ PhotoScan
・ PhotoScape
・ Photoscotosia
・ Photoscotosia insularis
・ Photosens


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Photorelaxation : ウィキペディア英語版
Photorelaxation

Photorelaxation or Photo-vasorelaxation, described as the relaxation of blood vessels in response to light.
This phenomenon of photorelaxation which although is reported for around sixty years was never described, pursued or explained; it was serendipitously rediscovered by Dr. Dan Berkowitz at Johns Hopkins University, Baltimore, and along with his team he not only elucidated the mechanism but the group is also trying to harness light for treatment of cardiovascular disease.
The research by Sikka et al. concluded that there are light sensing receptors, melanopsin receptors, are present in blood vessels and mediate wavelength specific, light-dependent vascular relaxation. This photorelaxation signal transduction involves cyclic guanosine monophosphate (cGMP) and phosphodiesterase type 6, but not cGMP-dependent protein kinase or Protein Kinase G (PKG). Furthermore it is regulated by Beta adrenergic receptor kinase type 1 (βARK or BARK) also called G protein coupled receptor kinase 2 (GRK2), and involves vascular hyperpolarization and this receptor pathway could be targeted for wavelength-specific light-based therapy in the treatment of diseases that involve altered vasoreactivity.
==References==


抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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