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:
TAG: New hope for preventing major problems the retina

(Date:6/17/2015)... , Deutschland und GERMANTOWN, Maryland ... Investigator ®   Produktlinie mit DNA-Tests ... QIAGEN N.V. (NASDAQ: QGEN ; Frankfurt Prime Standard: ... neue STR-Testkits der Produktlinie Investigator ... in den Markt eingeführt. Die neuen Kits zur Erstellung ...
(Date:6/17/2015)... 2015  Synaptics Inc. (NASDAQ: SYNA ), ... that Xiaomi, one of the world,s largest mobile ... ® family of capacitive touchscreen solutions and ... for its latest smartphones, the Xiaomi Mi Note ... in-cell display solutions and DDICs in discrete display ...
(Date:6/16/2015)... CITY , June 16, 2015 /CNW Telbec/ ... their partnership centralized around the incorporation of handyem,s ... point-of-care diagnostic laboratory, the Mo-POD™. This unprecedented model ... BIO International Conference at the Pennsylvania ... from June 15 th to 18 ...
Breaking Biology News(10 mins):QIAGEN bringt in den USA neue Kits für die forensische DNA-Analyse auf den Markt 2QIAGEN bringt in den USA neue Kits für die forensische DNA-Analyse auf den Markt 3QIAGEN bringt in den USA neue Kits für die forensische DNA-Analyse auf den Markt 4QIAGEN bringt in den USA neue Kits für die forensische DNA-Analyse auf den Markt 5QIAGEN bringt in den USA neue Kits für die forensische DNA-Analyse auf den Markt 6Synaptics Touchscreen and Display Driver IC Solutions Power Xiaomi's Latest Flagship Smartphones 2Synaptics Touchscreen and Display Driver IC Solutions Power Xiaomi's Latest Flagship Smartphones 3handyem and FlowMetric Diagnostics announce their partnership in the development of Flow Cytometry- Based Solutions in diagnostic capabilities 2handyem and FlowMetric Diagnostics announce their partnership in the development of Flow Cytometry- Based Solutions in diagnostic capabilities 3
(Date:6/26/2015)... ... June 26, 2015 , ... Charm Sciences, Inc. is ... and Stockyards Administration (GIPSA) awarded a five year contract to Charm Sciences to ... Charm’s ROSA DONQ-FAST5 Test. This 5 minute quantitative test extracts DON from samples ...
(Date:6/26/2015)... ... 26, 2015 , ... Claremont BioSolutions, LLC, a pioneer of ... into a sample prep module intended to enable real-time quantitative gene expression analysis ... WetLab-2 Project. , On June 28, 2015, SpaceX CRS-7 will launch from Cape ...
(Date:6/26/2015)... 26, 2015 The report "Biolubricants ... Fluids, Metalworking fluids, Chainsaw oils, Mold Release Agents), End ... - Global trends and Forecasts to 2020" published by ... Million by 2020 at a CAGR of 6.27% between ... data Tables and   66 Figures spread through 170 ...
(Date:6/25/2015)... , June 25, 2015 /PRNewswire/ ... http://www.researchandmarkets.com/research/vxtfvv/2015_market ) has announced the addition ... of the Global Cancer Diagnostics Industry: ... Hormones, Immunohistochemical Stains--Hospitals, Commercial Labs, POC ...      (Logo: http://photos.prnewswire.com/prnh/20130307/600769) , ...
Breaking Biology Technology:USDA-GIPSA (FGIS) Awards 5 Year Contract for Vomitoxin Tests to Charm Sciences 2Claremont BioSolutions’ SimplePrep™ Products Deployed in NASA Wetlab-2 Project Slated for June 28th Flight to International Space Station aboard SpaceX CRS-7 2Claremont BioSolutions’ SimplePrep™ Products Deployed in NASA Wetlab-2 Project Slated for June 28th Flight to International Space Station aboard SpaceX CRS-7 3Biolubricants Market Worth $2,972.13 Million by 2020 2Biolubricants Market Worth $2,972.13 Million by 2020 3Analysis of the Global Cancer Diagnostics Industry 2015-2020: Oncogenes, Biochemical Markers, Lymphokines, GFs, CSFs, Hormones, Immunohistochemical Stains 2Analysis of the Global Cancer Diagnostics Industry 2015-2020: Oncogenes, Biochemical Markers, Lymphokines, GFs, CSFs, Hormones, Immunohistochemical Stains 3
Cached News: