Assyro AI
US FDAUnited StatesCRLComplete Response Letter

Complete Response Letter BLA 7613031 (Mar 22, 2024)

Issued March 22, 2024

Issued

March 22, 2024

Application

BLA • 7613031

Review center

CBER

Stage

Final Decision

Letter type

Complete Response Letter

Response due March 22, 2025Requires resubmission addressing deficiencies.

Summary

This letter from the FDA identifies deficiencies in a Biologics License Application (BLA) for a product intended for follicular lymphoma, specifically regarding the timely completion of confirmatory trials. It outlines requirements for resubmission, including addressing trial progress, updating prescribing information and safety data, and resubmitting the proprietary name. The letter also provides instructions for the format and content of the resubmission and sets a one-year deadline for action.

Key points

  • Address the deficiency regarding the timely completion of confirmatory trials in follicular lymphoma.
  • Request a meeting with the Agency to discuss trial benchmarks (e.g., enrollment goals, site activation, primary endpoint events, trial completion date) after enrollment and analysis of Part 1 (safety run-in or dose-finding) is completed for the intended confirmatory trial(s).
  • Demonstrate in the submission that milestones are appropriate and that sufficient progress in the conduct of the confirmatory portion of the trial(s) will be demonstrated prior to approval to assure timely completion.
  • Review labeling review resources on the Prescription Drug Labeling Resources and Pregnancy and Lactation Labeling Final Rule websites.
  • Use the Selected Requirements for Prescribing Information (SRPI) checklist to ensure Prescribing Information conforms with format items in regulations and guidances if labeling is revised.
  • Include updated content of labeling [21 CFR 601.14(b)] in structured product labeling (SPL) format in the response.
  • Resubmit the proposed proprietary name when all application deficiencies identified in this letter have been addressed.
  • Include a safety update as described at 21 CFR 601.2 when responding to deficiencies.

Cited reasons

  • Lack of Assurance for Timely Completion of Confirmatory Trials
  • Comprehensive Safety Update Required
  • Proprietary Name Resubmission Required
  • Labeling Comments Reserved
  • The primary reason for the Complete Response Letter is the lack of sufficient assurance regarding the timely completion of confirmatory clinical trials for follicular lymphoma. Additionally, a comprehensive safety update is required, and the proprietary name must be resubmitted once all other deficiencies are addressed. Comments on labeling are reserved until the application is otherwise adequate.

Recommended actions

  • Address the deficiency regarding the timely completion of confirmatory trials in follicular lymphoma.
  • Request a meeting with the Agency to discuss trial benchmarks (e.g., enrollment goals, site activation, primary endpoint events, trial completion date) after enrollment and analysis of Part 1 (safety run-in or dose-finding) is completed for the intended confirmatory trial(s).
  • Demonstrate in the submission that milestones are appropriate and that sufficient progress in the conduct of the confirmatory portion of the trial(s) will be demonstrated prior to approval to assure timely completion.
  • Review labeling review resources on the Prescription Drug Labeling Resources and Pregnancy and Lactation Labeling Final Rule websites.
  • Use the Selected Requirements for Prescribing Information (SRPI) checklist to ensure Prescribing Information conforms with format items in regulations and guidances if labeling is revised.
  • Include updated content of labeling [21 CFR 601.14(b)] in structured product labeling (SPL) format in the response.
  • Resubmit the proposed proprietary name when all application deficiencies identified in this letter have been addressed.
  • Include a safety update as described at 21 CFR 601.2 when responding to deficiencies.

Deficiency summary

The primary reason for the Complete Response Letter is the lack of sufficient assurance regarding the timely completion of confirmatory clinical trials for follicular lymphoma. Additionally, a comprehensive safety update is required, and the proprietary name must be resubmitted once all other deficiencies are addressed. Comments on labeling are reserved until the application is otherwise adequate.

Findings

Lack of Assurance for Timely Completion of Confirmatory Trials

Severity: critical

The current conduct and projected completion date of the OLYMPIA trials in follicular lymphoma do not provide sufficient assurance of timely completion of the trial(s). The sponsor must demonstrate appropriate milestones and sufficient progress in the confirmatory portion of the trial(s) prior to approval.

Recommended response: Request a meeting with the Agency to discuss trial benchmarks (e.g., enrollment goals, site activation, proportion of primary endpoint events accrued, trial completion date) and demonstrate sufficient progress in the conduct of the confirmatory portion of the confirmatory trial(s).

Comprehensive Safety Update Required

Severity: major

A comprehensive safety update is required as described at 21 CFR 601.2. This includes detailing significant changes in the safety profile, presenting new safety data from studies, retabulating adverse events, providing case report forms and narrative summaries for deaths and serious adverse events, updating exposure information, and summarizing worldwide experience.

Recommended response: Provide a detailed safety update including all specified data points: significant changes, new safety data, retabulations of adverse events, case report forms and narratives for deaths/serious AEs, updated exposure information, worldwide experience, and English translations of current approved foreign labeling.

Cited: 21 CFR 601.2

Proprietary Name Resubmission Required

Severity: minor

The proposed proprietary name was found conditionally acceptable pending approval of the application. It must be resubmitted when all other application deficiencies identified in this letter have been addressed.

Recommended response: Resubmit the proposed proprietary name after all other application deficiencies have been fully addressed.

Labeling Comments Reserved

Severity: info

Comments on the proposed Prescribing Information, Carton and Container Labeling, and Medication Guide are reserved until the application is otherwise adequate. The sponsor is encouraged to review labeling resources and ensure compliance with format items.

Recommended response: Review labeling resources (Prescription Drug Labeling Resources, Pregnancy and Lactation Labeling Final Rule, SRPI checklist) and prepare to submit updated content of labeling in Structured Product Labeling (SPL) format once other deficiencies are resolved.

Cited: 21 CFR 601.14(b)

Regulatory context

Submission stage
final decision
Regulatory pathway
BLA

Impact

Impact score
0.95
Estimated delay
545 days
Estimated rework cost
$0
Subsequent action
resubmission

Strategic insights

The primary theme is the inadequacy of clinical trial progress and data to support timely completion and approval, necessitating a comprehensive safety update and administrative actions for resubmission. Labeling comments are deferred pending resolution of core deficiencies.

Regulatory change impact: Pending sponsor mitigation plan

Approval likelihood after response: 5%

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