ERYTECH's (ERYP) TRYbeCA-1 Phase 3 Trial Did Not Meet Primary Endpoint

ERYTECH Pharma (Nasdaq: ERYP), a clinical-stage biopharmaceutical company developing innovative therapies by encapsulating therapeutic drug substances inside red blood cells, today announced top-line results from its Phase 3 TRYbeCA-1 clinical trial evaluating eryaspase as second-line treatment in 512 patients with metastatic pancreatic cancer. The trial did not meet its primary endpoint of overall survival (OS).

In the TRYbeCA-1 trial, eryaspase demonstrated an improvement in the primary endpoint of OS compared to chemotherapy alone with a hazard ratio (HR) of 0.92 (95% confidence interval (CI), 0.76-1.11) in the intent-to-treat population, and the difference was not statistically significant (p-value 0.375). The median OS for patients treated with eryaspase plus chemotherapy was 7.5 months (95% CI, 6.5-8.3), compared to 6.7 months (95% CI, 5.4-7.5) for chemotherapy alone.

Interestingly, while the patients treated with gemcitabine plus nabpaclitaxel did not experience a survival benefit from the addition of eryaspase, patients treated with eryaspase and an irinotecan-based chemotherapy regimen showed nominal survival benefit with a HR of 0.77 (95% CI, 5.7-1.05) over those treated with chemotherapy alone. This prespecified subgroup had a median OS of 8.0 months in the eryaspase-treated arm versus 5.7 months in the control arm (per protocol population).

Key secondary endpoints of the trial, including progression-free survival, disease control rate and objective response rate, showed benefit in favor of eryaspase.

The safety profile of eryaspase observed in the TRYbeCA-1 trial was consistent with earlier observations and previous safety reviews by the trial’s independent data monitoring committee (IDMC).

Further analysis of the data will be performed, and full results will be presented at an upcoming medical conference.

ERYTECH will now focus on its late-stage program in acute lymphoblastic leukemia (ALL) and pursue a path to approval in hypersensitive ALL based on positive results of NOPHO-sponsored Phase 2 trial. The Company reiterates its intention to submit a BLA before the end of the year.

“While the results are disappointing, we congratulate the company for a very well managed trial in this difficult disease. With a median survival of 7.5 months, ERYTECH has created a new reference standard for clinical evaluation in second line pancreatic cancer”, said Prof. Pascal Hammel, MD, PhD, gastroenterologist-oncologist at Beaujon Hospital in Paris and co-principal investigator of the TRYbeCA-1 trial.

“I agree with Prof Hammel, and want to add that the results in the subgroup of fluoropyrimidine-based treatments are, with a median survival of 8 months, really remarkable and merit further investigation. Especially since this was also the better subgroup in the Phase 2b trial”, said Prof. Manuel Hidalgo, M.D., Ph.D., Weill Cornell Medicine/NewYork-Presbyterian Hospital, and co-principal investigator of the study.

“Pancreatic cancer is a very challenging, heterogeneous disease, and the results of the TRYbeCA-1 Phase 3 trial have now also encountered this significant hurdle.” said Dr Iman El Hariry, Chief Medical Officer of ERYTECH. “It is very disappointing that the clinical benefit eryaspase demonstrated in the Phase 2 trial was not confirmed; however, the study has addressed important questions in the management of pancreatic cancer patients. I want to thank the patients, their families and healthcare providers, our vendors, as well as our colleagues at ERYTECH, who overcame many obstacles, including the COVID-19 pandemic, to execute this important trial. Targeting the altered asparagine and glutamine metabolism of cancer cells, well established in ALL, remains an important field of development, also for the field of solid tumors. The ERYTECH team along with its clinical advisors will review the full data analyses including the secondary and exploratory endpoints and provide a more detailed update on additional subgroup analysis after these are completed".

“These results are highly disappointing, not only for the ERYTECH team, but also for patients and healthcare providers as there continues to be a major unmet medical need in pancreatic cancer.” added Gil Beyen, CEO of ERYTECH. “We continue to believe in the potential of cancer metabolism and our ERYCAPS® platform to treat aggressive forms of cancer, and will, while evaluating the potential to continue the development in pancreatic cancer, now continue to focus on seeking approval of eryaspase for ALL patients who developed hypersensitivity to pegylated asparaginase. This is also an important medical need and a potentially attractive market opportunity for eryaspase. We confirm our previously announced intention to submit a BLA for this indication by year-end 2021. We will evaluate our strategic and partnering options in the coming weeks and will provide updated guidance on our global corporate strategy later in the year.”

TRYbeCA-1 Top-line Results and Analysis Conference Call Details

ERYTECH management will hold a conference call and webcast on October 25, at 8:30am EDT / 2:30 pm CEST highlights the top-line results and plans for future approval and launch in 2022. Gil Beyen, CEO, Eric Soyer, CFO/COO, and Iman El-Hariry, CMO, will deliver a brief presentation, followed by a Q&A session.

• The audio call is accessible via the below registering link: http://www.directeventreg.com/registration/event/2361482 (Conference ID : 2361482). Once registered, participants will receive a unique access code and the call number details to join the teleconference.
  • The webcast can be followed live online via the link: https://edge.media-server.com/mmc/p/4cdxqddy

An archive of the webcast will be available on ERYTECH’s website, under the “Investors” section at investors.erytech.com

An archived replay of the audio call will be available for 7 days by dialing + 1 855 859 2056, Conference ID: 2361482#.

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