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Seawater Bacteria Hold Promise to Fight Skin Cancer

by Adeline Dorcas on March 7, 2019 at 2:12 PM
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Seawater Bacteria Hold Promise to Fight Skin Cancer

Bacteria from seawater can offer new hope for treating patients with melanoma, reports a new study. The findings of the study are published in the ACS Medicinal Chemistry Letters.

Malignant melanoma can be a particularly dangerous form of cancer, and more therapeutic options are needed. Now, researchers report that a bacteria from seawater has inspired promising leads for an entirely new way to treat the disease.

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In melanoma, cancer cells form in melanocytes, the cells that color the skin. While new cases of most types of cancer are declining, those of melanoma -- the deadliest form of skin cancer -- continue to climb, according to the U.S. Centers for Disease Control and Prevention. If melanoma metastasizes, or migrates to other locations in the body, the prognosis is poor and treatment options are limited.

New chemotherapy agents were recently approved that target melanomas with so-called "BRAF" mutations, but some of these tumors are already showing resistance to these therapies. William Fenical, James J. La Clair, Leticia Costa-Lotufo and colleagues decided the best solution would be to take aim at a completely different biochemical pathway in melanoma.
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In 2014, the researchers discovered that seriniquinone, a natural product isolated from a rare marine bacteria, showed potent and selective activity against melanoma cells in a test tube. Even better, it was the first small molecule ever shown to target a particular protein involved in cancer proliferation.

In their new work, the team identified the structural components of the natural product that were key to its activity, and then modified other parts of the molecule to make it more water soluble and easier to purify. Both these steps are necessary to make it more suitable as a drug. The researchers are now further refining these seriniquinone derivatives to optimize activity against melanoma.

Source: Eurekalert
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