CLR 131

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Overview

CLR 131 is a phospholipid drug conjugate (PDC) that selectively delivers radiation (a cytotoxic radioisotope called iodine-131) directly to malignant cancer cells. The US Food and Drug Administration (FDA) has granted Cellectar an orphan drug designation for CLR 131.

SparkCures ID 222
Developed By Cellectar Biosciences
Generic Name CLR 131
Additional Names I-131-CLR1404
Treatment Classifications
  • Phospholipid Drug Conjugate (PDC)
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Clinical Trials

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Early Relapse Multiple Myeloma

The following is a listing of clinical trials for patients with multiple myeloma who have received one to two prior lines of therapy.

Late Relapse Multiple Myeloma

The following is a listing of clinical trials for patients with multiple myeloma who have received three or more prior lines of therapy.

Smoldering Myeloma
Monoclonal Gammopathy of Undetermined Significance (MGUS)

Published Results

Fractionated Dosing of CLR 131 in Patients with Relapsed or Refractory Multiple Myeloma Presented at the 61st Annual American Society of Hematology Conference

December 09, 2019

Dr. Ailawadhi's presentation highlighted results from 19 patients with relapsed/refractory multiple myeloma from Cellectar’s Phase 1 and Phase 2 CLOVER-1 trial collected prior to July 30, 2019. The data from the oral presentation support prior literature and preclinical data showing that fractionated dosing provides an enhancement of efficacy and safety while reducing adverse events.

  • The patients presented received one of 3 dose levels: a single bolus dose of 31.25 mCi/m2 or a fractionated dose of 31.25 mCi/m2 or a higher fractionated dose of 37.5 mCi/m2 of CLR 131.
  • The fractionated 37.5 mCi/m2 dose of CLR 131 represents the greatest amount of drug administered to date in the Phase 2 CLOVER-1 trial.
  • The overall response rate (ORR) for all multiple myeloma patients across the 3 dose cohorts was 31.3% and a 100% disease control rate.
  • Patients receiving the higher fractionated 37.5 mCi/m2 dose demonstrated a 50% ORR with the remaining 50% having minimal responses (greater than a 25% reduction in the surrogate marker of efficacy).

Resources

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