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Nuisance seaweed found to produce compounds with biomedical potential
Date:5/25/2012

A seaweed considered a threat to the healthy growth of coral reefs in Hawaii may possess the ability to produce substances that could one day treat human diseases, a new study led by scientists at Scripps Institution of Oceanography at UC San Diego has revealed.

An analysis led by Hyukjae Choi, a postdoctoral researcher in William Gerwick's laboratory at Scripps, has shown that the seaweed, a tiny photosynthetic organism known as a "cyanobacterium," produces chemical compounds that exhibit promise as anti-inflammatory agents and in combatting bacterial infections. The study is published in the May 25th issue of the journal Chemistry & Biology.

"In different arenas these compounds could be helpful, such as treating chronic inflammatory conditions for which we currently don't have really good medicines," said Gerwick, a professor of oceanography and pharmaceutical sciences at the Center for Marine Biotechnology and Biomedicine at Scripps and UC San Diego Skaggs School of Pharmacy and Pharmaceutical Sciences.

Scientists identified the "nuisance" organism in 2008 on the reefs directly adjacent to the National Park Pu'uhonua o H'onaunau off the Kona coast of Hawaii. The cyanobacterium is believed to be native to Hawaii and is usually inconspicuous, said Jennifer Smith, a Scripps assistant professor in the Scripps Center for Marine Biodiversity and Conservation and a paper coauthor.

"When we first found the bloom during routine surveys with the University of Hawaii we were concerned as it was clearly smothering the corals at one of the most popular dive sites in Hawaii," said Smith. "Observations in the field even suggested that the cyanobacteria may have been releasing some chemical that was causing the coral to bleach."

When Smith and her colleagues found the seaweed blooming it was clear that it was overgrowing and negatively affecting the underlying corals. Samples were retrieved in 2009 and transferred to Scrip
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Contact: Mario Aguilera
scrippsnews@ucsd.edu
858-534-3624
University of California - San Diego
Source:Eurekalert

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