HOME >> BIOLOGY >> NEWS
New hope for preventing major problems of the retina

Bethesda, MD -- The primary function of the retina is to capture light and initiate neural signals. The retina contains the photoreceptors, which are the site of sensory transduction in the visual pathway. Major landmarks in the retina are the fovea and macula, where light has a direct pathway to the receptors. An interruption of the blood supply to these landmarks can lead to age-related macular degeneration and diabetes, the cause of severe visual problems.

Dopamine is an intermediate in tyrosine metabolism and precursor of norepinephrine and epinephrine; it accounts for 90 percent of the catecholamines; its presence in the central nervous system and localization in the basal ganglia (caudate and lentiform nuclei) suggest that dopamine may have other functions. Now a new research study reveals that the body's dopaminergic system plays a role in the regulation of retinal blood flow in the body. In addition, their data presents evidence for the diminishing effect of dopamine on the pathways coupling sensory input to vascular response.

Dopaminergic functions in the eye are complex and affect several ocular tissues. These include transmitter effects and impacts on intraocular (within the eyeball) pressure (IOP) and ocular blood flow. It is known from several tissues that vascular effects of dopamine are not only mediated via specific dopamine receptors but also by influencing other effector pathways like catecholamine receptors, a major responder to stress.

Vascular dopaminergic effects in the eye in past studies have revealed that dopamine antagonists (domperidone and haloperidol) increase ocular blood flow in rabbits. Other dopamine antagonists had similar effects, whereas dopamine agonists did not affect beating ocular blood flow. Dopamine has been investigated extensively in glaucoma research. One previous effort found that D1 agonists (when combined with receptors initiate drug action) increase pressure within the eye, where D1 antagon
'"/>

Contact: Donna Krupa
djkrupa1@aol.com
703-527-7357
American Physiological Society
12-Feb-2003


Page: 1 2 3 4

Related biology news :

1. Research suggests new avenue for stopping, preventing colon cancer
2. Data show investigational antibiotic safe, effective in preventing travelers diarrhea
3. NIH told regular and moderate exposure to sunlight is the key to preventing chronic disease
4. Study points to new gene therapy tool in preventing epileptic seizures
5. Brain reserve capacity and its role in preventing clinical signs of Alzheimers disease studied
6. Vitamin D may be crucial in preventing colon cancer
7. Conference focuses on practical strategies for preventing and treating obesity
8. Cancer-preventing gene protects against stress and extends life span in worms
9. New protein may play role in preventing malignant change in cells
10. Researchers develop new method for preventing hip dysplasia in dogs
11. Vitamin K intake may be helpful in preventing hip fracture

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:2/8/2017)... Report Highlights ... The global synthetic-biology market reached nearly $3.9 billion in ... a compound annual growth rate (CAGR) of 24.0% through 2021. ... for synthetic biology. - Analyses of global market trends, with ... annual growth rates (CAGRs) through 2021. - Coverage of core ...
(Date:2/7/2017)... WARSAW, Ind. , Feb. 7, 2017 ... global leader in musculoskeletal healthcare, will present at the ... Lotte New York Palace Hotel on Wednesday, February 15, ... A live webcast of the presentation can be accessed ... for replay following the conference via Zimmer Biomet,s Investor ...
(Date:2/3/2017)... A new independent identity strategy consultancy firm ... . Designed to fill a critical niche in technical ... partners Mark Crego and Janice Kephart ... identity expertise that span federal governments, the 9/11 Commission, ... combined expertise has a common theme born from a ...
Breaking Biology News(10 mins):
(Date:2/23/2017)... ... February 23, 2017 , ... ... as insulin, cortisol, CRP, adiponectin, uric acid, and/or other biomarkers or SNPs of ... Assay from Salimetrics’ SalivaLab , the relationship between insulin and other relevant ...
(Date:2/23/2017)... UK (PRWEB) , ... February 22, 2017 , ... ... optics and photonics , have been named Fellows of the Society this year, ... technical contributions in the multidisciplinary fields of optics, photonics, and imaging as well ...
(Date:2/22/2017)... , Feb. 22, 2017 Scientists propose ... inflammation and organ damage in Gaucher and maybe other ... risks and lower costs than current therapies. ... Hospital Medical Center , which also included investigators from ... , report their data Feb. 22. The study was ...
(Date:2/22/2017)... DUBLIN , Feb 22, 2017 ... addition of the "Global Biological Crop Protection (Bio-Pesticide) Market-By Type, ... Forecasts (2016-2021)" report to their offering. ... Global Biological Crop Protection Market is ... The strong growth in biopesticide or biological crop protection ...
Breaking Biology Technology:
Cached News: