Navigation Links
Scientists synthesize long-sought-after anticancer agent

New Haven, Conn.A team of Yale University scientists has synthesized for the first time a chemical compound called lomaiviticin aglycon, leading to the development of a new class of molecules that appear to target and destroy cancer stem cells.

Chemists worldwide have been interested in lomaiviticin's potential anticancer properties since its discovery in 2001. But so far, they have been unable to obtain significant quantities of the compound, which is produced by a rare marine bacterium that cannot be easily coaxed into creating the molecule. For the past decade, different groups around the world have been trying instead to synthesize the natural compound in the lab, but without success.

Now a team at Yale, led by chemist Seth Herzon, has managed to create lomaiviticin aglycon for the first time, opening up new avenues of exploration into novel chemotherapies that could target cancer stem cells, thought to be the precursors to tumors in a number of different cancers including ovarian, brain, lung, prostate and leukemia. Their discovery appears online today in the Journal of the American Chemical Society.

"About three quarters of anticancer agents are derived from natural products, so there's been lots of work in this area," Herzon said. "But this compound is structurally very different from other natural products, which made it extremely difficult to synthesize in the lab."

In addition to lomaiviticin aglycon, Herzon's team also created smaller, similar molecules that have proven extremely effective in killing ovarian stem cells, said Gil Mor, M.D., a researcher at the Yale School of Medicine who is collaborating with Herzon to test the new class of molecules' potential as a cancer therapeutic.

The scientists are particularly excited about lomaiviticin aglycon's potential to kill ovarian cancer stem cells because the disease is notoriously resistant to Taxol and Carboplatin, two of the most common chemotherapy drugs. "Ovarian cancer has a high rate of recurrence, and after using chemotherapy to fight the tumor the first time, you're left with resistant tumor cells that tend to keep coming back," Mor explained. "If you can kill the stem cells before they have the chance to form a tumor, the patient will have a much better chance of survival and there aren't many potential therapies out there that target cancer stem cells right now."

Herzon's team, which managed to synthesize the molecule in just 11 steps starting from basic chemical building blocks, has been working on the problem since 2008 and spent more than a year on just one step of the process involving the creation of a carbon-carbon bond. It was an achievement that many researchers deemed impossible, but while others tried to work around having to create that bond by using other techniques, the team's persistence paid off.

"A lot of blood, sweat and tears went into creating that bond," Herzon said. "After that, the rest of the process was relatively easy."

Next, the team will continue to analyze the compound to better understand what's happening to the stem cells at the molecular level. The team hopes to begin testing the compounds in animals shortly.

"This is a great example of the synergy between basic chemistry and the applied sciences," Herzon said. "Our original goal of synthesizing this natural product has led us into entirely new directions that could have broad impacts in human medicine."


Contact: Suzanne Taylor Muzzin
Yale University

Related biology news :

1. Scientists climb Mt. Everest to explain how hearts adapt and recover from low oxygen
2. Scripps Research scientists convert skin cells to beating heart cells
3. Scripps Research scientists reveal key mechanism governing nicotine addiction
4. Scientists determine what makes an orangutan an orangutan
5. Scientists link protein to the insulation of the nervous systems wiring
6. Scientists grow human liver tissue to be used for transplantation
7. Scientists reveal complete structure of HIVs outer shell
8. Scientists: Big city life may alter green attitudes
9. Scientists find the master switch for key immune cells in inflammatory diseases
10. MU scientists find new farming method to reduce greenhouse gases, increase farm yields
11. 7 CAMH scientists win Young Investigator awards focused on breakthrough research
Post Your Comments:
(Date:6/22/2016)... WASHINGTON , June 22, 2016 On ... highly-anticipated call to industry to share solutions for the ... by U.S. Customs and Border Protection (CBP), explains that ... nationals are departing the United States ... criminals, and to defeat imposters. Logo - ...
(Date:6/20/2016)... 20, 2016 Securus Technologies, a leading ... for public safety, investigation, corrections and monitoring announced ... it has secured the final acceptance by all ... Managed Access Systems (MAS) installed. Furthermore, Securus will ... be installed by October, 2016. MAS distinguishes between ...
(Date:6/15/2016)... 15, 2016 Transparency Market ... Recognition Market by Application Market - Global Industry Analysis Size ... to the report, the  global gesture recognition market ... and is estimated to grow at a CAGR ... 2024.  Increasing application of gesture recognition ...
Breaking Biology News(10 mins):
(Date:6/27/2016)... ... June 27, 2016 , ... Parallel 6 , the leading software ... Clinical Reach Virtual Patient Encounter CONSULT module which enables both audio and ... clinical trial team. , Using the CONSULT module, patients and physicians can schedule a ...
(Date:6/27/2016)... N.C. (PRWEB) , ... June 27, 2016 , ... ... commercial operations for Amgen, will join the faculty of the University of ... as adjunct professor of strategy and entrepreneurship at UNC Kenan-Flagler, with a focus ...
(Date:6/27/2016)... Ginkgo Bioworks , a leading organism design company ... as one of the World Economic Forum,s Technology ... companies. Ginkgo Bioworks is engineering biology to manufacture ... the nutrition, health and consumer goods sectors. The ... Fortune 500 companies to design microbes for their ...
(Date:6/24/2016)... June 24, 2016 Epic Sciences unveiled ... cancers susceptible to PARP inhibitors by targeting homologous ... (CTCs). The new test has already been incorporated ... multiple cancer types. Over 230 clinical ... response pathways, including PARP, ATM, ATR, DNA-PK and ...
Breaking Biology Technology: