Ayala Pharmaceuticals Presents Preliminary Clinical Data from the Ongoing Phase 2 ACCURACY Trial

Ayala Pharmaceuticals

WILMINGTON, DE — Ayala Pharmaceuticals, Inc. (NASDAQ: AYLA) recently announced new preliminary clinical data from the 6mg cohort of its ongoing Phase 2 ACCURACY trial of AL101 for the treatment of recurrent/metastatic (R/M) adenoid cystic carcinoma (ACC) harboring Notch-activating mutations. The data is being presented at the 2021 ESMO Virtual Congress as an ePoster. In a separate ePoster presentation, Ayala presented new preclinical results evaluating the potential of AL101 in combination with approved cancer therapies for dual targeting of ACC tumours.

“ACC is an orphan disease with no approved therapies and patients with Notch mutations have a more aggressive disease course and poorer survival outcomes as compared to patients with Notch wild-type. R/M ACC remains a significant area of unmet need, and I am encouraged by the preliminary results that AL101 monotherapy has demonstrated to-date. Coupled with new preclinical data showing that AL101 in combination with approved targeted therapies could potentially treat a greater proportion of ACC tumors, regardless of Notch mutations, it will be exciting to see how AL101 may be developed as a viable treatment option for R/M ACC patients,” said Alan L. Ho, M.D., Ph.D., Medical Oncology, Memorial Sloan Kettering Cancer Center and Lead Investigator in The ACCURACY Trial. “While these results are still preliminary, the safety profile of AL101 and the disease control rate of 70% are promising indicators in this incredibly difficult to treat patient population.”

“The preliminary safety and efficacy data from the 6mg cohort of our ongoing ACCURACY trial of AL101 highlights a favourable profile. We are pleased to see that AL101’s safety profile continues to be tolerable and manageable, providing us with potential dosing flexibility as we continue to advance our development plans,” said Gary Gordon, M.D., Ph.D., Chief Medical Officer of Ayala. “We continue to see strong potential for AL101 to transform the treatment landscape for R/M ACC patients with Notch mutations and we look forward to reporting additional clinical data in 2022.”

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Preliminary Safety and Efficacy Data from 6mg Cohort of ACCURACY Phase 2 Trial:
Ayala presented new preliminary 6mg data from its ongoing ACCURACY Phase 2 clinical trial evaluating the safety and efficacy of AL101 monotherapy for the treatment of patients with R/M ACC harboring Notch-activating mutations. The Phase 2 ACCURACY clinical trial is an open-label, single-arm, multi-center study to assess the clinical activity of AL101 using radiographic assessments of patients with R/M ACC demonstrating disease progression within 6 months prior to dosing.

As of July 9, 2021, all 42 patients enrolled in the 6mg cohort were treated and evaluable for safety and 33 were evaluable for efficacy.

Efficacy:
All evaluable patients were assessed for efficacy for a best response by investigators using RECIST 1.1 criteria.

  • Disease control rate (DCR) (defined as partial response and stable disease) was 70% (23/33 patients).
  • Partial responses (PR) were observed in 3 patients (9%).
  • Stable disease (SD) was observed in 20 patients (61%).
  • Progressive disease (PD) was observed in 8 patients (24%).
  • Two patients were determined to be evaluable per protocol but their scans were not available for analyses.
  • Study is ongoing with several patients remaining on drug as of the cutoff date.

Safety:
AL101 6mg QW treatment in patients with R/M ACC was well tolerated with manageable side effects consistent with those observed in the 4mg QW cohort with no new adverse events (AEs) specific to the 6mg cohort.

  • Most common treatment-related (TR) AEs of any grade were diarrhea (76%), fatigue (48%), nausea (41%), hypophosphatemia (29%), vomiting (26%) and decreased appetite (26%).
  • Treatment-related diarrhea was common and occurred in 32 patients (76%) and most were grades 1 and 2. Treatment-related serious diarrhea occurred in 6 patients (14%).
  • Serious TRAEs were reported in 31% of patients with treatment-emergent AEs leading to discontinuation in 26% of patients.
  • Two patients experienced a grade 4 TRAE: one patient experienced a seizure and one patient experienced drug-induced liver injury.
  • Four treatment-emergent patient deaths occurred (10%), one of which was assessed by the investigator to be treatment related.
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Ayala plans to report additional data from the ACCURACY study in 2022.

“Our new preclinical study evaluating the potential of improved efficacy of AL101 in combination with approved targeted therapies represents a promising potential approach for additive or synergistic activity of gamma secretase inhibition when combined with various mechanisms of action,” said Roni Mamluk, Ph.D., Chief Executive Officer of Ayala. “We observed stronger tumor growth inhibition in ACC PDX models with Notch pathway genes downregulated regardless of mutational status in the combination arm of the study, as compared to AL101 monotherapy. Based on these results, we believe there is a strong rationale for a combination therapy approach to treating ACC, in addition to other cancer indications in which Notch is dysregulated. We look forward to the further development of AL101 in Notch dysregulated tumors, both as monotherapy and in combination.”

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Preclinical Results of AL101 Combined with Other Drugs for Dual Targeting of Notch Dysregulated Tumors:
In this preclinical study evaluating the potential of combination therapy of AL101 in PDX models of ACC, Ayala compared the differential gene expression of ACC tumors versus normal matched tissue regardless of Notch activation status. Combination compounds were selected based on determination of the pathways that are implicated with approved oncology therapies, including inhibitors of Bcl2, HDAC, FGFR & CDK4/6. Based on a comparison of AL101 alone, each approved drug alone, and the combination of each drug with AL101, Ayala observed additive or synergistic activity of AL101 combined with agents of various mechanisms of action. AL101 in combination demonstrated significant tumor growth inhibition, including regressions, compared to each drug alone, showing significant benefit with dual targeting of Notch and other dysregulated pathways. Additionally, the study indicated that crosstalk between signaling pathways may increase the efficacy of AL101 in R/M ACC regardless of Notch mutational status. These preclinical results demonstrated a compelling rationale for potential expansion to a larger portion of ACC patients and to additional cancer indications.

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