Photoprotective Effect of Tea and its Extracts against Ultraviolet Radiation-Induced Skin Disorders

Abstract

Ultraviolet (UV) exposure induces photodamage of skin. It is a matter of concern that the level of UV radiation reaching the earth surface is increasing as a result of depletion of the

Protective Effect of (-)-Epigallocatechin Gallate against Photo-Damage Induced by Ultraviolet A in Human Skin Fibroblasts

“…UV B has indirect detrimental effects on the immune system of the skin, oxidative stress responses, and photoaging [3]. UV A radiation is more than 90 % of atmospheric UV irradiation [2], and it penetrates much deeper into the epidermis and dermis of the skin [4,5].…”

“…UV A radiation is absorbed by DNA and reacts with non-DNA chromophores, leading to formation of reactive oxygen species (ROS) which damage DNA, proteins, and lipids in the skin [4,5]. UV A plays a significant role in producing genotoxic bipyrimidine photo-products [6].…”

Protective effect of (-)-epigallocatechin gallate on ultraviolet b-induced skin damage in hairless mice

“…Tests using HaCaT cells concluded that green tea polyphenols afforded protection against UV-B induced stress by interacting with UV-B induced reactive oxygen species (ROS) and attenuating mitochondrion-mediated apoptosis [8]. However, these mechanisms need to be evaluated and verified in animal models and/or clinical studies [7,9].…”

Health Benefits of Theanine in Green Tea: A Review

“…Oral administration of L-cystine and L-theanine during the perioperative period alleviates post-gastrectomy inflammation and promotes recovery after surgery [54]. Supplementation of L-cystine and L-theanine significantly suppresses the exercise-induced fluctuation of blood immunocompetent cells, and helps to reduce alterations of the immune response by both attenuating the rise of neutrophil count and reducing the lymphocyte count caused by extreme endurance exercise [55][56][57].…”