The purpose of this study is to investigate the protective effect of taurine against photochemical damage in rabbit retina. Twenty seven rabbits were divided into three groups: control group (A), exposed to light without (B) and with taurine (C). Groups B and C were divided into four subgroups according to the time of exposure to white light (3, 6, 12 and 24 hr). Group C treated with taurine (4...

The purpose of this study is to investigate the protective effect of taurine against photochemical damage in rabbit retina. Twenty seven rabbits were divided into three groups: control group (A), exposed to light without (B) and with taurine (C). Groups B and C were divided into four subgroups according to the time of exposure to white light (3, 6, 12 and 24 hr). Group C treated with taurine (4...

A previous study has shown that in the cone-rich chicken retina, 11-cis retinyl ester increases with light exposure and decreases in subsequent dark adaptation. The purpose of this research is to study how light exposure (intensity and duration) determine the rate of accumulation and utilization as well as the size of this 11-cis retinyl ester pool in the chicken retina. Chickens were dark-adap...

Climate change-related coral bleaching, i.e., the visible loss of zooxanthellae from the coral host, is increasing in frequency and extent and presents a major threat to coral reefs globally. Coral bleaching has been proposed to involve accelerating light stress of their microalgal endosymbionts via a positive feedback loop of photodamage, symbiont expulsion and excess in vivo light exposure. T...

PURPOSE Microglial cells have been found to play pivotal roles in various neuronal degenerative diseases such as Parkinson's and Alzheimer's diseases. Minocycline, a microglial inhibitor, has recently been shown to be neuroprotective in various models of cerebral ischemia and degenerative diseases of the brain. This study was conducted to evaluate the neuroprotective effect of minocycline and t...

In dark-reared albino rats, exposure to 2 or 3 hr of intense light interrupted by 2 hr dark periods resulted in extensive degeneration of photoreceptor cells and degeneration of the retinal pigment epithelium (RPE). Ascorbate (ie, vitamin C) administration prior to light exposure protected photoreceptors and the RPE from light damage. In the present study, ascorbate-treated and untreated rats w...

background: trematodes belonging to the genus schistosoma cause schistosomiasis. the relationship between schistosomes and their intermediate hosts varies among snails. this study investigated the effects of s. japonicum on its snail host, oncomelania hupensis, and cercarial release rythmicity of s. japonicum and the effects of light on it. methods: : seven groups of o. hupensis (n = 40 each) w...

In humans, modulation of circadian rhythms by light is thought to be mediated primarily by melanopsin-containing retinal ganglion cells, not rods or cones. Melanopsin cells are intrinsically blue light-sensitive but also receive input from visual photoreceptors. We therefore tested in humans whether cone photoreceptors contribute to the regulation of circadian and neuroendocrine light responses...