On February 7, 2018 Cellectar Biosciences (Nasdaq: CLRB), a clinical stage biopharmaceutical company focused on the discovery, development and commercialization of drugs for the treatment of cancer, reported that the United States Patent and Trademark Office has issued a notice of allowance for U.S. Patent Application No. 15/095,641, entitled "Alkylphosphocholine Analogs for Multiple Myeloma Imaging and Therapy," which covers a method of use for CLR 131, the company’s lead radiotherapeutic Phospholipid Drug Conjugate (PDC) in multiple myeloma (MM) (Press release, Cellectar Biosciences, FEB 7, 2018, View Source [SID1234523792]).
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CLR 131 is Cellectar’s investigational compound under development for a range of orphan designated cancers. CLR 131 utilizes the company’s patented PDC tumor targeting delivery platform to deliver the cytotoxic radioisotope iodine-131 directly to tumor cells. CLR 131 is currently being evaluated in a Phase 1 clinical trial in patients with relapse or refractory MM, as well as in a Phase 2 clinical trial for relapsed or refractory MM and select relapsed or refractory lymphomas. The U.S. Food and Drug Administration has granted orphan drug designation for CLR 131 in the treatment of MM.
"This patent allowance enhances our intellectual property estate and underscores the novelty of CLR 131 for the treatment of multiple myeloma, a life-threatening disease with high unmet medical need," said James Caruso, chief executive officer of Cellectar Biosciences. "Importantly, upon issuance, this patent will extend our coverage into the mid-2030s."
About Phospholipid Drug Conjugates
Cellectar’s product candidates are built upon a patented delivery and retention platform that utilizes optimized phospholipid ether-drug conjugates (PDCs) to target cancer cells. The PDC platform selectively delivers diverse oncologic payloads to cancerous cells and cancer stem cells, including hematologic cancers and solid tumors. This selective delivery allows the payloads’ therapeutic window to be modified, which may maintain or enhance drug potency while reducing the number and severity of adverse events. This platform takes advantage of a metabolic pathway utilized by all tumor cell types in all cell cycle stages. Compared with other targeted delivery platforms, the PDC platform’s mechanism of entry does not rely upon specific cell surface epitopes or antigens. In addition, PDCs can be conjugated to molecules in numerous ways, thereby increasing the types of molecules selectively delivered. Cellectar believes the PDC platform holds potential for the discovery and development of the next generation of cancer-targeting agents.