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Is There A New Approach For Treating Skin Cancer?

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University of California, Irvine molecular biologists and their colleagues have identified an effective way to combat metastatic melanoma using new and innovative immune-therapeutic approaches. Led by Alexander D. Boiko, UCI assistant professor of molecular biology & biochemistry at the Ayala School of Biological Sciences and the Sue and Bill Gross Stem Cell Center, the researchers discovered that blocking the cell surface protein, CD47 - known as a "don't eat me" signal - on melanoma cells, increased the degree by which these cells were phagocytosed or "eaten" by macrophages.


The team further discovered that blocking CD47 in combination with targeting a second cell surface protein, CD271, previously found to be expressed on melanoma initiating cells, resulted in virtually complete inhibition of metastases arising from human melanoma tumors transplanted in mice. The full study appeared in Cell Reports.

The Findings

The cell surface protein CD47 was found to be overexpressed by metastatic melanomas, which helps them avoid being eliminated by the organism's immune system. CD271, on the other hand, had been previously shown by Boiko to mark a cell population in melanomas responsible for tumor initiation and metastatic spread of this aggressive cancer.

For the current study, Boiko and his team conjectured that metastatic melanomas relied on the overexpression of both proteins to fool the immune system and spread to other areas of the body.

To test this hypothesis, Boiko and his colleagues used specific blocking antibodies against CD47 - to activate macrophage phagocytosis - and CD271 - to selectively target the most aggressive melanoma cell population.

When mice bearing human metastatic melanomas were treated with this antibody regimen, researchers discovered that simultaneous application of antibodies against CD47 and CD271 resulted in near complete elimination of metastasis from all organs of experimental mice.

Boiko's group has further discovered that this therapeutic effect was mediated by profound alteration of the microenvironment surrounding the tumors, causing immune cells to fight cancer more effectively.

"Further research is needed to determine the full anti-metastatic properties of the dual CD47/CD271 antibody therapy and the safety of its application in human patients," Boiko said.

"However, combining this therapy with other emerging treatments that also modulate the immune system represents a new approach that may offer increased benefit against metastatic melanomas. These are very exciting times for the cancer immunotherapy field and we are aiming to add an important component to this type of treatment, which will hopefully translate into a more effective outcome for patients." 

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Founder Ray Spotts has a passion for all things natural and has made a life study of nature as it relates to health and well-being. Ray became a forerunner bringing products to market that are extraordinarily effective and free from potentially harmful chemicals and additives. For this reason Ray formed Trusted Health Products, a company you can trust for clean, effective, and healthy products. Ray is an organic gardener, likes fishing, hiking, and teaching and mentoring people to start new businesses. You can get his book for free, “How To Succeed In Business Based On God’s Word,” at www.rayspotts.com. 


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