But Researchers from Florida Atlantic University’s Harbor Branch Oceanographic Institute; have received $801,000 from the Florida Department of Health’s Bankhead Coley Cancer Research Program for a project to investigate; the use of marine natural compounds as potential treatments of triple negative breast cancers. This form of breast cancer; which represents about 12 % of breast cancers diagnosed in the United States; can very aggressive and easily spread to other organs; particularly the brain and the lungs.
Triple negative breast cancers also are more likely to recur than other breast cancers; and are classified as high-grade tumors because of the minimal resemblance these cancer cells have to normal cells. Finding targeted therapies for triple negative breast cancers; remains an elusive goal for scientists.
The objective of the project, “Discovery of Marine Natural Products Active Against Triple Negative Breast Cancers; Using 3D-spheroid Cultures; an In Vivo Relevant Assay Platform,” is to discover compounds from the extensive marine natural products library at FAU Harbor Branch that can induce programmed cell death; (apoptosis) in triple negative breast cancer cells grown as spheroids. Cells grown as spheroids more closely mimic tumors; and thus compounds identified through this screening effort are expected more easily translated to the clinic.
Secondary metabolites from marine organisms
However, the researchers hope to identify clinically active compounds that will revolutionize treatment regimens; and provide more effective treatment options, with less side effects; and greater survival rates. The five-year survival rate for triple negative breast cancers is about 77 % compared to 93 % for other breast cancer types. “But there are limited treatment options available for triple negative breast cancers; because they do not respond to targeted therapies,” said Esther Guzmán, Ph.D., principal investigator of the study and an associate research professor of cancer cell biology; at FAU Harbor Branch.
“But they believe that compounds with the novel activity; of inducing apoptosis in triple negative breast cancer cell spheroids; found among secondary metabolites obtained from marine organisms. These compounds could potentially developed as novel therapeutics; to treat this form of cancer or to serve as probes to expand our understanding of this disease.”
For more than a decade, FAU Harbor Branch researcher Amy Wright, Ph.D., a research professor of natural products chemistry and co-investigator in this project; has developed libraries of natural compounds isolated from marine organisms (the HBOI-enriched fraction library and the HBOI pure compound library). These libraries test against a variety of diseases both by Guzmán and other collaborators at the FAU Harbor Branch campus in Ft. Pierce and at partner laboratories throughout the country.
Aggressive forms of breast cancer
Once an activity discovered, bioassay-guided fractionation used to purify the bioactive natural products. However, these marine organisms many of them from deep-water habitats come primarily from around the Atlantic and Caribbean; others have come from the Galapagos, western Pacific, Mediterranean, Indo-Pacific, Western Africa and the Bering Sea. FAU Harbor Branch researchers are looking for treatments for cancer and infectious diseases; and also have collaborations with other scientists working on other forms of cancer, malaria, tuberculosis, neurodegenerative diseases and inflammation.
“Therefore the scientists have developed a very unique library of pure; and highly enriched fractions derived from marine organisms and deep-water marine invertebrates that only can be found at Florida Atlantic University’s Harbor Branch Oceanographic Institute,” said James M. Sullivan, Ph.D., executive director of FAU Harbor Branch, one on the university’s four research pillars.
“But this latest grant from the Florida Department of Health awarded to Dr. Guzmán and Dr. Wright will expand the scope of our cancer research and enable our scientists to develop other treatment options for one of the most aggressive forms of breast cancer.” Cancer cells that are grown in spheroid conditions (3D-cultures) allow the cells to interact with each other and the extracellular matrix, which provides a better representation of the in vivo environment than traditional 2D cultures.