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Nano-lipid Particles in Ginger Combat Colon Cancer

By Georgia State University | September 7, 2016

Edible ginger-derived nano-lipids created from a specific population of ginger nanoparticles show promise for effectively targeting and delivering chemotherapeutic drugs used to treat colon cancer, according to a study by researchers at the Institute for Biomedical Sciences at Georgia State University, the Atlanta Veterans Affairs Medical Center, and Wenzhou Medical University and Southwest University in China.

Colorectal cancer is the third most common cancer among men and women in the U.S., and the second-leading cause of cancer-related deaths among men and women worldwide. The incidence of colorectal cancer has increased over the last few years, with about one million new cases diagnosed annually. Non-targeted chemotherapy is the most common therapeutic strategy available for colon cancer patients, but this treatment method is unable to distinguish between cancerous and healthy cells, leading to poor therapeutic effects on tumor cells and severe toxic side effects on healthy cells. Enabling chemotherapeutic drugs to target cancer cells would be a major development in the treatment of colon cancer.

In this study, the researchers isolated a specific nanoparticle population from edible ginger (GDNP 2) and reassembled their lipids, naturally occurring molecules that include fats, to form ginger-derived nano-lipids, also known as nanovectors. To achieve accurate targeting of tumor tissues, the researchers modified the nanovectors with folic acid to create FA-modified nanovectors (FA nanovectors). Folic acid shows high-affinity binding to the folate receptors that are highly expressed on many tumors and almost undetectable on non-tumor cells.

The FA nanovectors were tested as a delivery platform for doxorubicin, a chemotherapeutic drug used to treat colon cancer. The researchers found that doxorubicin was efficiently loaded into the FA nanovectors, and the FA nanovectors were efficiently taken up by colon cancer cells, exhibited excellent biocompatibility and successfully inhibited tumor growth. Compared to a commercially available option for delivering doxorubicin, the FA nanovectors released the drug more rapidly in an acidic pH that resembled the tumor environment, suggesting this delivery strategy could decrease the severe side effects of doxorubicin. These findings were published in the journal Molecular Therapy.

“Our results show that FA nanovectors made of edible ginger-derived lipids could shift the current paradigm of drug delivery away from artificially synthesized nanoparticles toward the use of nature-derived nanovectors from edible plants,” says Dr. Didier Merlin, a professor in the Institute for Biomedical Sciences at Georgia State and a Research Career Scientist at the VA Medical Center. “Because they are nontoxic and can be produced on a large scale, FA nanovectors derived from edible plants could represent one of the safest targeted therapeutic delivery platforms.”

Dr. Mingzhen Zhang of the Institute for Biomedical Sciences at Georgia State is the first author of the study. Co-authors of the study include Dr. Emilie Viennois, Dr. Zhan Zhang and Moon Kwon Han of the Institute for Biomedical Sciences at Georgia State; Dr. Bo Xiao of the Institute for Biomedical Sciences at Georgia State and Southwest University in Chonqing, China; and Dr. Changlong Xu of the Institute for Biomedical Sciences at Georgia State and Wenzhou Medical University in Wenzhou, China.

The study was supported by the National Institute of Diabetes and Digestive and Kidney Diseases of the National Institutes of Health, the Department of Veterans Affairs, and the Crohn’s & Colitis Foundation of America.

Source: Georgia State University

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