Navigation Links
Skin 'sees' UV light, starts producing pigment
Date:11/3/2011

an immediate and massive calcium response," said Wicks, the study's lead author.

Further investigations found that the cells contained rhodopsin RNA and protein. Under UV light, when the scientists reduced rhodopsin levels in the cells, calcium signaling was reduced. Later, when they starved cells of retinal, they found that melanin production dropped. The authors also determined that long-wavelength UVA light, rather than short-wavelength UVB light, is what stimulates rhodopsin in melanocytes.

During several experiments they were able to trace the following process: When UVA light strikes rhodopsin receptors with retinal, calcium signals are triggered within a few seconds. After an hour, measurable amounts of melanin accumulate, although in relatively small quantities compared to the production that will occur within 24 hours.

As much as they learned, Oancea and Wicks still have some questions. One is whether rhodopsin is acting alone or in concert with another yet undiscovered receptor. Another question is whether melanocytes immediately begin exporting melanin to other kinds of skin cells for protection or whether they keep the early supply for themselves.

Just because scientists are learning more about how the skin responds to and protects itself against UV radiation, Oancea said, that's no reason for people to change what they do to protect themselves.

"This doesn't say, 'Don't use sunscreen'," Oancea said.


'/>"/>

Contact: David Orenstein
david_orenstein@brown.edu
401-863-1862
Brown University
Source:Eurekalert

Page: 1 2

Related medicine news :

1. Packaging expert sees a social revolution in the evolving barcode
2. How Brain Sees the Big Picture May Affect Self-Image
3. Study Sees Link Between Psoriasis, Obesity in Kids
4. GOES-13 sees an extraordinarily early Atlantic low in the tropics
5. U.S. Sees Slowdown in Spending on Mental Health
6. GOES-13 Satellite sees Groundhogs Day on ice
7. United States Sees Record Drop in Teen Births From 2007-09
8. Study Sees Link Between Low Salt Levels, Fracture Risk in Older Adults
9. Study Sees Link Between Epilepsy, Infertility
10. Journal of Vascular and Interventional Radiology sees growth, promise of tumor ablation
11. Ear Infection is the Most Common Reason Why an American Child Sees the Doctor
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:11/28/2014)... November 29, 2014 The holiday season is ... recently announced its new collection of fashionable party dresses. What’s ... off, on all these brand new outfits; the special offer ... is a renowned online supplier and it has received a ... new items are specially designed to flatter various body shapes; ...
(Date:11/28/2014)... 2014 Pathways Home Health & ... This national movement was created to encourage people to ... local charities and causes. This online event, celebrated ... kickoff of the holiday shopping season. #GivingTuesday is to ... Cyber Monday is to online commerce. , The goal ...
(Date:11/28/2014)... is always making changes to its infrastructure architecture as ... effective, and secure experience. Most recently, the company announced ... to setup local servers for each country or continent. ... the globe. , 2. The ability to setup a ... millions of users in one network. , 3. The ...
(Date:11/28/2014)... November 28, 2014 Junk-A-Car ( http://www.junkacar.com ... expanding their service offerings to help drivers, especially those ... and Washington, D.C. metropolitan areas deal with the especially ... a large part of the country. , With the ... in hundreds of totaled, crashed and junk ...
(Date:11/28/2014)... Novatus, a leading provider of contract ... provides customers with greater reporting capabilities, more searchable ... we continue to evolve and grow the Novatus ... improved performance in response to requests from our ... the enhancements that we have made to Advanced ...
Breaking Medicine News(10 mins):Health News:Trendy Party Dresses For The Coming Holiday Season From Balfleet.com 2Health News:Pathways Home Health & Hospice Joins #GivingTuesday; Annual Holiday Encourages Local Charitable Giving 2Health News:Pathways Home Health & Hospice Joins #GivingTuesday; Annual Holiday Encourages Local Charitable Giving 3Health News:Brosix Infrastructure Architecture Changes to Benefit Users 2Health News:Junk-A-Car Expanding Service to Assist U.S. Car Owners That May be Affected by Severe Winter Storms 2Health News:Novatus Releases v5.1 with New Advanced Reporting Capabilities 2
... Swedish medical university Karolinska Institutet have determined the first ... interaction between the mammalian egg coat and sperm. The ... glimpse into the molecular architecture of animal egg coats, ... medicine and the possibility of developing novel contraceptives. , ...
... skin, intestinal mucosa or blood, have a lifespan of only ... replenishment of specialized cells is indispensable. This is the task ... cells. , Stem cells have two main characteristics: ... cell types that make up their respective tissue a ...
... AARP CEO Bill Novelli today released the following statement in ... , , (Logo: http://www.newscom.com/cgi-bin/prnh/20070209/NYF043LOGO ... are in dire economic times that will only get worse ... immediate choice is between letting these corporations go under -- ...
... 4 Cardinal Health and the,Texas Hospital Association (THA) ... to safeguard patients and combat deadly health care associated,infections ... Texas Hospital Association and its marketing subsidiary, HealthShare,recently endorsed ... help combat HAIs, improve patient care and dramatically reduce,infection-related ...
... Getting back in the gym and,erasing years of ... amounts of,weight because your health depends on it is ... joining forces with NBC,s hit weight loss,program The ... of,their lives by creating a co-branded protein product, The ...
... Diagnostics, a segment of BD (Becton, Dickinson and Company) (NYSE: ... Food and Drug Administration (FDA) Premarket Approval (PMA) for the ... designed to enhance cervical cancer screening for cytology laboratories using ... squamous carcinoma, adenocarcinoma and their usual precursor conditions. ...
Cached Medicine News:Health News:Crystallography reveals the 3-D structure of mammalian sperm receptor 2Health News:Dormant stem cells for emergencies 2Health News:Dormant stem cells for emergencies 3Health News:AARP: Health Care and Pension Reform Critical to Economic Recovery 2Health News:AARP: Health Care and Pension Reform Critical to Economic Recovery 3Health News:Texas Hospital Association Endorses MedMined(TM) Services to Help Fight Hospital Acquired Infections 2Health News:Texas Hospital Association Endorses MedMined(TM) Services to Help Fight Hospital Acquired Infections 3Health News:DESIGNER WHEY to Help Contestants and Fans of NBC's The Biggest Loser Shed Pounds 2Health News:DESIGNER WHEY to Help Contestants and Fans of NBC's The Biggest Loser Shed Pounds 3Health News:DESIGNER WHEY to Help Contestants and Fans of NBC's The Biggest Loser Shed Pounds 4Health News:BD Receives FDA Approval for the BD FocalPoint(TM) GS Imaging System to Enhance the Detection of Cervical Cancer 2
(Date:11/26/2014)... Nov. 26, 2014  Cohen, Placitella & Roth, ... investors who purchased Nymox Pharmaceutical Corporation ("Nymox" or ... period from January 31, 2011 through November 2, ... and certain of its officers and directors publically ... of Sections 10(b) and 20(a) of the Securities ...
(Date:11/26/2014)... 2014   Regulus Therapeutics Inc . (NASDAQ: ... and development of innovative medicines targeting microRNAs, today announced ... CEO of Regulus, will present a company overview at ... at the New York Palace Hotel on Wednesday, December ... be webcast at the time of the presentation and ...
(Date:11/26/2014)... -- Investor-Edge has initiated coverage on the following ... PLC (NASDAQ: HZNP ), Endocyte Inc. (NASDAQ: ... ), and Theravance Inc. (NASDAQ: THRX ). Free ... http://investor-edge.com/register . On Tuesday, November 25, 2014, the ... Industrial Average edged 0.02% lower, to finish the day at ...
Breaking Medicine Technology:Cohen, Placitella & Roth, PC Investigating Nymox Pharmaceutical Corporation for Failing to Disclose Material Information 2Cohen, Placitella & Roth, PC Investigating Nymox Pharmaceutical Corporation for Failing to Disclose Material Information 3Regulus to Present at the 26th Annual Piper Jaffray Healthcare Conference and Genetic Rx Conference 2Regulus to Present at the 26th Annual Piper Jaffray Healthcare Conference and Genetic Rx Conference 3Pharma Stocks Highlight - VIVUS, Horizon Pharma, Endocyte, Johnson and Johnson, and Theravance 2Pharma Stocks Highlight - VIVUS, Horizon Pharma, Endocyte, Johnson and Johnson, and Theravance 3Pharma Stocks Highlight - VIVUS, Horizon Pharma, Endocyte, Johnson and Johnson, and Theravance 4Pharma Stocks Highlight - VIVUS, Horizon Pharma, Endocyte, Johnson and Johnson, and Theravance 5
... UBM Canon Medical Device Media Group,s ... the " Technological Advances in Implantable Devices " virtual event ... 5 p.m. Eastern.  The event is dedicated to cutting-edge trends ... conference and trade show offers the opportunity to learn from ...
... N.J., Feb. 1, 2011 Soligenix, Inc. (OTC Bulletin ... a late-stage biopharmaceutical company, announced today that it has ... and Chief Medical Officer. Dr. Horgan is a board-certified ... experience in the care of patients with inflammatory bowel ...
Cached Medicine Technology:UBM Studios Virtual Event Connects the UBM Canon Medical Device Media Group with the Medical Device Design Community 2UBM Studios Virtual Event Connects the UBM Canon Medical Device Media Group with the Medical Device Design Community 3Soligenix Appoints Kevin Horgan, MD, as Chief Medical Officer 2Soligenix Appoints Kevin Horgan, MD, as Chief Medical Officer 3Soligenix Appoints Kevin Horgan, MD, as Chief Medical Officer 4
... a floor model centrifuge to do, but just ... PR-7000M delivers up to 50% more force in ... faster and more efficiently., Tremendous Capacity ... liters, PR-7000M accommodates 30 microplates, up to 408 ...
Inquire...
Inquire...
Inquire...
Medicine Products: