New Mesothelioma Clinical Trial Hopes to Improve Chemotherapy

Research & Clinical Trials
Reading Time: 3 mins
Publication Date: 01/27/2016
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Povtak, T. (2020, October 16). New Mesothelioma Clinical Trial Hopes to Improve Chemotherapy. Asbestos.com. Retrieved December 6, 2022, from https://www.asbestos.com/news/2016/01/27/mesothelioma-clinical-trial-more-effective-chemotherapy/

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Povtak, Tim. "New Mesothelioma Clinical Trial Hopes to Improve Chemotherapy." Asbestos.com, 16 Oct 2020, https://www.asbestos.com/news/2016/01/27/mesothelioma-clinical-trial-more-effective-chemotherapy/.

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Povtak, Tim. "New Mesothelioma Clinical Trial Hopes to Improve Chemotherapy." Asbestos.com. Last modified October 16, 2020. https://www.asbestos.com/news/2016/01/27/mesothelioma-clinical-trial-more-effective-chemotherapy/.

Thoracic oncologist Dr. Marianna Koczywas has spent almost 20 years at the City of Hope Comprehensive Cancer Center searching for more effective drug combinations to combat lung cancer and malignant pleural mesothelioma.

She may have found a winner this time.

Koczywas is the principal investigator in a phase II clinical trial for mesothelioma involving methoxyamine, a small molecule inhibitor drug designed to increase the effectiveness of chemotherapy.

“I am optimistic,” Koczywas told Asbestos.com. “There has been a real unmet need [with mesothelioma]. The idea is to be smarter than the cancer cells. We’re trying to reverse the resistance to chemotherapy. Yes, we are hopeful.”

Methoxyamine is being tested in combination with pemetrexed (Alimta) in patients whose mesothelioma has progressed after previous chemotherapy. As part of the same trial, methoxyamine also will be tested in combination with pemetrexed and cisplatin in patients with mesothelioma that has spread to other locations in the body.

Attacking the Cancer Repair Mechanism

Mesothelioma is a rare and aggressive cancer caused by exposure to asbestos. It is especially resistant to chemotherapy, which explains the typically grim prognosis of 6-18 months of survival from diagnosis.

Although a chemotherapy combination of pemetrexed and cisplatin has been effective initially with mesothelioma, it rarely can sustain effectiveness for very long. The cancer becomes immune to the chemotherapy and resumes spreading.

Methoxyamine is designed to prevent this immunity. The clear, water-soluble compound works by inhibiting a repair pathway that allows the cancer cells to fight off the chemotherapy.

“The idea is to attack the repair mechanism, block the way the cancer cell repairs itself,” Koczywas said. “I expect a lot of interest in this.”

Thoracic oncologist Dr. Marianna Koczywas from City of Hope

Thoracic oncologist Dr. Marianna Koczywas from City of Hope.

TRACON Pharmaceuticals is the clinical-stage drug company in San Diego that has developed TRC102, its version of methoxyamine. The clinical trial is sponsored by the National Cancer Institute (NCI).

The trial is now recruiting patients in several locations across the U.S., including:

  • City of Hope Comprehensive Cancer Center in Duarte, California
  • The University of Colorado Cancer Center in Aurora, Colorado
  • The University of Maryland Cancer Center in Baltimore, Maryland
  • The University of Michigan Comprehensive Cancer Center in Ann Arbor, Michigan
  • The Mayo Clinic in Rochester, Minnesota

Additional treatment centers in Houston, Cleveland and Chicago are expected to join the trial soon.

Patients in the trial will receive methoxyamine at the clinic for four consecutive days, along with pemetrexed. The course is repeated every 21 days, or until unacceptable toxicity or disease progression. The trial includes six courses of chemotherapy, although patients may continue indefinitely if a benefit is seen by the treating physician.

Working for Other Cancers

TRC102 has been effective in previous trials involving brain tumors (glioblastoma) and chemotherapy drugs pemetrexed, temozolomide and fludarabine.

“TRC102 has shown promising data in multiple phase I trials, and we’re pleased the NCI has chosen to move forward into phase II testing,” Dr. Charles Theuer, president of TRACON, said in a company press release.

“Previous trials have shown that TRC102 can be safely combined with three separate chemotherapeutics,” he said. “This study is part of a broad development program that includes a number of additional planned studies.”

TRACON Pharmaceuticals develops novel targeted cancer therapies. Its TRC105 antibody is directed at renal cell carcinoma and hepatocellular carcinoma.

This clinical trial with TRC102 is one of five nationally involving methoxyamine, but one of more than 200 trials for mesothelioma.

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