Optical clearing of human skin: comparative study of permeability and dehydration of intact and photothermally perforated skin.
Accelerated diffusion of water and hyperosmotic optical clearing agents is studied as a result of enhanced epidermal permeability. A lattice of microzones (islets) of damage in stratum corneum is induced using a flash-lamp applique system. An optical clearing agent composed of 88% glycerol in aqueous solution is used for all experiments. Research of skin dehydration and glycerol delivery through epidermis at both intact and perforated stratum corneum is presented. The dehydration process induced by both stimuli of evaporation and osmotic agent action is studied by weight measurements. Dynamics of refractive index alteration of both glycerol solution and water during their interaction with skin samples is monitored. The amounts of water escaping from skin through the stratum corneum, due to hyperosmotic-agent action, and glycerol penetrating through the skin sample, are estimated. The results show that the proposed method allows for effective transepidermal water loss and delivery of optical clearing agents.
Genina
Elina A
EA
Saratov State University, Institute of Optics and Biophotonics, Saratov, Russia. eagenina@optics.sgu.ru
Bashkatov
Alexy N
AN
Korobko
Anastasiya A
AA
Zubkova
Elena A
EA
Tuchin
Valery V
VV
Yaroslavsky
Ilya
I
Altshuler
Gregory B
GB
D000438:Alcohols / Q000008:administration & dosage*; D000818:Animals; D001834:Body Water / Q000378:metabolism*; D003879:Dermatologic Agents / Q000008:administration & dosage*; D006801:Humans; D066298:In Vitro Techniques; D010539:Permeability / Q000187:drug effects; D010789:Phototherapy / Q000379:methods; D012031:Refractometry; D012869:Skin Absorption / Q000187:drug effects / Q000502:physiology; D012879:Skin Physiological Phenomena / Q000187:drug effects*; D013552:Swine
D000438:Alcohols; D003879:Dermatologic Agents