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Home NEWS Science News

Beta blocker shows cancer-fighting properties

Bioengineer by Bioengineer
April 23, 2017
in Science News
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Credit: Bradley T. Andresen PhD, Western University of Health Sciences

Chicago (April 23, 2017) – A new study finds that carvedilol, a drug typically used to treat high blood pressure, can protect against the sun-induced cell damage that leads to skin cancer. Researchers serendipitously discovered the beta blocker's cancer-fighting properties after making an error in the lab.

Sherry Liang, a graduate student at the Western University of Health Sciences College of Pharmacy, will present the new findings at the American Society for Pharmacology and Experimental Therapeutics annual meeting during the Experimental Biology 2017 meeting, to be held April 22-26 in Chicago.

"What began as an experimental error led to a very interesting scientific discovery," said Ying Huang, PhD, coleader of the research team with Bradley T. Andresen, PhD. "Our research could lead to the development of a class of new cancer-preventive agents."

Carvedilol's cancer-fighting properties were discovered when a former graduate student in Huang's lab was studying whether carvedilol and similar beta blockers might increase cancer risk. The student inadvertently tested carvedilol's anticancer effect rather than its ability to promote cancer, finding that carvedilol surprisingly showed some protective effects against skin cancer.

The researchers then conducted experiments with cell cultures and mice to see if carvedilol could prevent skin cancer caused by ultraviolet-B (UVB), the portion of sunlight that tends to damage the skin's top epidermal layers and plays a key role in skin cancer development.

The researchers found that carvedilol exhibited a protective effect in cultured mouse skin cells exposed to UVB and in hairless mice given the drug after UVB exposure. The experiments showed that carvedilol acted by protecting cells against the cancer-causing DNA damage and cell death produced by UVB. Hairless mice exposed to UVB and given carvedilol showed decreases in both the severity and number of tumors that developed compared to those not given carvedilol. The mouse studies also showed that carvedilol delayed skin tumor formation more than sunscreen.

The researchers also discovered that not all beta blockers show cancer preventive properties, indicating that the cancer-fighting beta blockers likely act on not yet identified molecules. "We have preliminary data indicating that the cellular targets for carvedilol are not related to the beta-adrenergic receptors that are the commonly accepted targets for all beta blockers," said Andresen. "They likely target unexpected mechanisms involved in cancer development."

The researchers aim to incorporate carvedilol or similar beta blockers into a skin cream or spray that could hopefully be used to prevent skin cancer arising from UV light exposure. The treatment would act on the skin without affecting blood pressure and heart rate, which are commonly altered by beta blockers. Understanding carvedilol's mechanisms of action could also allow scientists to design completely new treatments that target these mechanisms without introducing any cardiovascular effects.

###

Sherry Liang will present the findings at 12:30-2:30 p.m. Tuesday, April 25, in Hall F, McCormick Place Convention Center (poster D151 996.2) (abstract). Another poster from the same group will be presented at 12:30-2:30 p.m. Sunday, April 23, in Hall F, McCormick Place Convention Center (poster D146 671.13) (abstract). Contact the media team for more information or to obtain a free press pass to attend the meeting.

Video available.

About Experimental Biology 2017

Experimental Biology is an annual meeting comprised of more than 14,000 scientists and exhibitors from six host societies and multiple guest societies. With a mission to share the newest scientific concepts and research findings shaping clinical advances, the meeting offers an unparalleled opportunity for exchange among scientists from across the United States and the world who represent dozens of scientific areas, from laboratory to translational to clinical research. http://www.experimentalbiology.org #expbio

About the American Society for Pharmacology and Experimental Therapeutics (ASPET)

ASPET is a 5,100 member scientific society whose members conduct basic and clinical pharmacological research within the academic, industrial and government sectors. Our members discover and develop new medicines and therapeutic agents that fight existing and emerging diseases, as well as increase our knowledge regarding how therapeutics affects humans. http://www.aspet.org

Find more news briefs and tipsheets at: https://www.eurekalert.org/meetings/eb/2017/newsroom

Media Contact

Anne Frances Johnson
[email protected]
571-271-1986

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Story Source: Materials provided by Scienmag

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