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Cellectar Completes Enrollment in Phase I Clinical Trial of Lead Drug Candidate (131)I-CLR1404 for the Treatment of Solid Malignancies

Eight patients with advanced solid malignancies were enrolled in the trial which was designed to measure drug safety and the normal organ and whole body dosimetry of (131)I-CLR1404. Dosimetry measurements allow investigators to understand how the radiopharmaceutical will impact non-tumor organs and how it clears from the body over time. Results will be used to set the starting dose for the second Phase I study - a dose escalation study to determine the Maximum Tolerated Dose (MTD) of (131)I-CLR1404 in patients with advanced solid malignancies.

Lead investigator Joanne Mortimer, MD, Vice Chair of Medical Oncology & Therapeutics Research, City of Hope, said, "This drug candidate has the potential to treat many tumor types, including some of the most challenging. The results of this initial study will provide a better understanding of the full potential of (131)I-CLR1404 and, enable us to move forward toward determining an appropriate therapeutic dose for patients."

Cellectar's President and CEO, Bill Clarke, M.D., commented, "The dosimetry and biodistribution results of this study reveal both the initial safety profile of this drug and an approximate possible dose range that a patient could receive in a therapeutic situation. We look forward to continuing the development of (131)I-CLR1404 in order to determine the safe dose, and then to begin our efficacy studies. Having the opportunity to assess the potential of (131)I-CLR1404 therapy for solid tumor patients who have few treatment options is our primary goal."

About (131)I-CLR1404

Cellectar's (131)I-CLR1404 is a small-molecule, phospholipid ether analog that combines lipid-like properties with a cancer therapeutic beta-emitting radioisotope. Cellectar believes that this compound will benefit individuals with cancer due to its selective retention and accumulation in malignant cells versus nonmalignant cells. Preclinical animal studies demonstrated that (131)I-CLR1404 significantly slowed the growth of malignant solid tumors and resulted in improved survival.

About Cellectar

Cellectar, Inc. is a clinical stage radiopharmaceutical company that designs, develops and manufactures products to detect, treat and monitor a wide variety of human cancers. Cellectar's novel product candidates combine lipid-like molecules, phospholipid ethers (PLEs) analogs, with radioisotopes that can either image or destroy malignant cells. Cellectar's products' unique mechanism of action is based on their accumulation and selective retention in malignant tumors and not in normal cells. The company's operations are based in Madison, WI. For further information, please visit Cellectar's website at www.cellectar.com.

SOURCE Cellectar, Inc.