Aduro Biotech (ADRO)

[jondoeuk]

Aduro Biotech Presents Encouraging Anti-Tumor Response Data From Ongoing Phase 1b Study in Malignant Pleural Mesothelioma at ASCO

June 04, 2016 9:00 a.m. ET
BERKELEY, Calif., June 04, 2016 (GLOBE NEWSWIRE) -- Aduro Biotech, Inc. (Nasdaq:ADRO) today announced the presentation of updated data from an ongoing Phase 1b clinical trial of its immunotherapy product candidate CRS-207 in combination with pemetrexed and cisplatin (standard of care chemotherapy) as front-line treatment for patients with unresectable malignant pleural mesothelioma (MPM). The results from the first of two cohorts were presented today in a poster presentation at the 2016 American Society of Clinical Oncology Meeting (ASCO) held in Chicago. Of the 36 evaluable patients, disease control was observed in 94% (34/36), including 3% (1/36) with a complete response, 56% (20/36) with partial responses and 36% (13/36) experiencing stable disease following treatment with CRS-207 and chemotherapy. Prior to receiving chemotherapy, 31% (11/36) of patients experienced some tumor shrinkage (range: -1% to -43%) after receiving CRS-207 alone. The estimated median overall survival was 16.4 months (95% CI: 11.0 – 20.6 months). CRS-207 was generally well-tolerated with no treatment-related serious adverse events or cumulative toxicities when administered with chemotherapy.

"The observed responses with the combination of CRS-207 and standard chemotherapy are unprecedented in mesothelioma," said Dean Fennell, Ph.D., F.R.C.P., professor of Thoracic Medical Oncology at the University of Leicester and president of the International Mesothelioma Interest Group (iMig). "Pleural mesothelioma is a devastating disease, and these data suggest that immunotherapy has the potential to advance treatment options for these patients."

Dirk G. Brockstedt, Ph.D., executive vice president of Research and Development at Aduro added, "These results demonstrate that CRS-207 induces anti-tumor activity in patients with malignant pleural mesothelioma. We are looking forward to the results from the study’s second cohort, which is evaluating the addition of immune modulating doses of cyclophosphamide to the CRS-207 chemotherapy combination. Preclinical data suggest that the simultaneous inhibition of regulatory T-cells through the addition of a checkpoint inhibitor may amplify the tumor response and overall survival seen with CRS-207. As such, the combination of CRS-207 with a checkpoint inhibitor could be the regimen we advance in our mesothelioma program going forward.”

The multi-center Phase 1b study enrolled chemotherapy-naïve patients with unresectable MPM and good performance status (ECOG 0 or 1) to receive two doses of CRS-207, followed by up to six cycles of chemotherapy and two additional CRS-207 doses. Clinically stable patients receive CRS-207 maintenance every eight weeks and are followed every eight weeks until disease progression. Objectives of the study are safety, immunogenicity, objective tumor responses and tumor marker kinetics.

A second cohort of 22 patients is receiving an immunomodulatory dose of cyclophosphamide one day prior to each CRS-207 administration in the same treatment regimen utilized in the first cohort. This cohort is fully enrolled and patient follow-up is ongoing.

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