Overcoming cardiac pacemaker "source-sink mismatch"

Instead of complication-prone electronic cardiac pacemakers, biomedical engineers at Georgia Tech and Emory envision the creation of “biological Read more

Hope Clinic part of push to optimize HIV vaccine components

Ten years ago, the results of the RV144 trial– conducted in Thailand with the help of the US Army -- re-energized the HIV vaccine field, which had been down in the Read more

Invasive cancer cells marked by distinctive mutations

What does it take to be a leader – of cancer cells? Adam Marcus and colleagues at Winship Cancer Institute are back, with an analysis of mutations that drive metastatic behavior among groups of lung cancer cells. The findings were published this week on the cover of Journal of Cell Science, and suggest pharmacological strategies to intervene against or prevent metastasis. Marcus and former graduate student Jessica Konen previously developed a technique for selectively labeling “leader” Read more

dermatology

Old drug = new treatment for parasitic skin disease?

A coal-tar dye first produced in the 19th century, gentian violet is available over the counter as an antifungal agent.

Dermatologist Jack Arbiser has been a champion of the inexpensive drug gentian violet for skin diseases. He recently teamed up with collaborators in Brazil to find that gentian violet is active against leishmaniasis, a disfiguring skin disease found in many tropical and subtropical countries.

Caused by protozoan parasites and transmitted by sand flies, leishmaniasis’ most common form produces skin sores but can also affect the nose and mouth and even vital organs. The World Health Organization has identified Kabul, Afghanistan as a world hot spot for leishmaniasis.

In the journal PLOS One, Ana Paula Fernandes and colleagues at the Federal University of Minas Gerais showed that gentian violet and related compounds are active against Leishmania species in animal models.

Conventionallly, therapy for leishmaniasis has involved antimony compounds, but resistance is growing. More recently, clinicians have used the drugs miltefosine and amphotericin against leishmaniasis, but severe side effects have been reported.

“Because it has a http://www.troakley.com/ proven safety record, gentian violet might be a useful treatment that can be used in developing countries as well as by US troops serving in Afghanistan,” Arbiser says.

Arbiser also recently published a case report on the use of gentian violet, in combination with the immune modulator imiquimod, to treat melanoma.

Posted on by Quinn Eastman in Immunology Leave a comment

Sunscreen: Looking Beyond the Numbers

Carl Washington, MD

Seems pretty obvious – if a sunscreen with an SPF of 30 is good, then an SPF of 100 should be at least three times as good.

Unfortunately, that is not the case.  There are other important details to consider when you are purchasing a sunscreen.

“People have become much more educated about the importance of using sunscreen, and manufacturers have responded with an abundance of products,” says Carl Washington, MD, associate professor of Dermatology at Emory University School of Medicine. “Unfortunately, the labeling can be confusing and many of the current sunscreens only contain the ingredients necessary to offer protection against sunburn, but not skin cancer or aging.”

Recently, the Food and Drug Administration created new regulations to establish standards for sunscreen manufacturers to follow before they label their products.

Under the new regulations, which will go into effect in 2012, sunscreen products that protect against all types of sun-induced skin damage will be labeled “broad spectrum” and “SPF 15” or higher on the container. Only products that have been tested to ensure they protect against both UVA (ultraviolet radiation A) and UVB (ultraviolet radiation B) radiation will be allowed to use this labeling.  Broad-spectrum sunscreens of SPF 15 and higher can also be labeled as protective against skin cancer and premature aging. The maximum SPF value is set at 50-plus because the FDA says anything higher doesn’t provide a significant amount of additional protection.

Manufacturers will have to include warning labels on products that are not broad spectrum. Products that claim to be water resistant must indicate how long the consumer should expect to be protected in the water, and using such language as “waterproof” or “sweat proof” will not be allowed.

“Skin cancer is the most common form of cancer in the United States, and the number of people affected keeps rising. Simply getting into the habit of using a sunscreen every day – with the appropriate levels of protection – can make a significant difference in preventing many skin cancers, as well as premature aging,” says Washington.

“These new regulations will help consumers understand the difference in degrees of sun protection, and choose carefully.”

Washington also suggests staying out of direct sunlight between 10 am and 2 pm, seeking shade when you are outdoors, remembering to reapply sunscreen every two hours and wearing protective clothing.

Posted on by Kathi Baker in Uncategorized Leave a comment