Showing posts with label blindness. Show all posts
Showing posts with label blindness. Show all posts

Friday, July 6, 2018

Blinding canine eye disease.

Blinding canine eye disease.Discovery for a blinding canine eye disease reveals an unprecedented mode of inheritance.A new gene for canine congenital eye disease has been identified. Defective RBP4 leads to vitamin A deficiency and abnormal eye development during pregnancy. The study defines a novel recessive mode of maternal inheritance, which may underlie other types of birth defects. Collaborating research groups from the University of Helsinki, UC Davis and the University of Jyväskylä describe a new genetic cause for canine congenital eye disease in Irish Soft-Coated Wheaten Terriers. The affected dogs suffer from bilateral microphthalmia i.e. very small eyes and anatomical defects, resulting in incurable blindness. Similar findings are seen in the Microphthalmia-Anophthalmia-Coloboma (MAC) spectrum of human congenital eye malformations, which are important causes of childhood blindness. RBP4 defect leads to vitamin A deficiency -- a known risk factor for eye diseases. The study demonstrates a novel recessive mode of genetic inheritance, which has not described before. The researchers discovered that the dam's genotype determines the puppy's disease risk as both the dam and puppy must be homozygous for the mutation to manifest the disease.As a part of the research, a DNA test has been developed for veterinary diagnosis and breeding purposes. DNA testing is important for breeders to avoid producing more blind dogs. The test can identify carriers and allow better breeding plans.

Monday, April 25, 2016

Research: how bananas prevent blindness.

Research: how bananas prevent blindness. Researchers have found that bananas have carotenoid ; a compound that turn fruits and vegetables red, orange or yellow and are converted into vitamin A.This is an important precursors for eye health and its produced in the liver. Bananas are ideal food for young children and families for many regions of the world, because of their sweetness, texture, portion size, familiarity, availability, convenience, versatility and cost. According to a research, it show that foods containing high levels of carotenoids also protect against chronic disease, including certain cancers, cardiovascular disease and diabetes. The study showed that banana rich in provitamin A carotenoids may offer a potential food source for alleviating vitamin A deficiency -- important for sight. To combat vitamin A deficiency, researchers have been investigating methods to boost carotenoids in bananas. Cara L. Mortimer and other researchers from Queensland University of Technology in Australia studied two banana varieties to find out why they make very different amounts of carotenoids. They found that the pale yellow, low-carotenoid cavendish variety produces more of an enzyme that breaks down carotenoids. In addition, another variety stashes its carotenoids in microscopic sacs during ripening, shifting the chemical equilibrium in the fruit so it can make even higher levels of these substances. The findings, published in ACS' Journal of Agricultural and Food Chemistry, can someday help in the development of banana varieties with enhanced health benefits. read more http://www.theweekendleader.com/Headlines/6833/a-banana-a-day-may-keep-blindness-away-.html

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