Yttrium (90Y) clivatuzumab tetraxetan
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Yttrium (90Y) Clivatuzumab Tetraxetan (hPAM4-Cide): A Targeted Approach for Pancreatic Cancer Therapy
Yttrium (90Y) Clivatuzumab Tetraxetan, commercially recognized as hPAM4-Cide, is a pioneering monoclonal antibody-drug conjugate developed to target and treat pancreatic cancer, a malignancy notorious for its resilience to conventional therapies.
Background and Mechanism of Action
- Classification: Monoclonal Antibody-Drug Conjugate.
- Target: MUC1 protein, overexpressed in pancreatic tumor cells.
- Therapeutic Aim: Specific targeting and eradication of MUC1-positive pancreatic tumor cells.
The drug is characterized by two primary components:
- Clivatuzumab: A humanized monoclonal antibody that meticulously recognizes and binds to the MUC1 protein, an antigen frequently overexpressed in pancreatic tumors[1].
- Tetraxetan-Chelated Yttrium-90: Once Clivatuzumab binds to the MUC1 protein on the tumor cell, the associated yttrium-90, a potent radioisotope, releases radiation that damages and induces death in the tumor cells[2].
Drug Development and Clinical Assessment
Immunomedics, Inc. spearheaded the research and development of Yttrium (90Y) Clivatuzumab Tetraxetan. Their focused approach was built upon:
- Drug Conjugation Strategy: Merging the specificity of antibodies with the cytotoxic potential of radioisotopes to create a targeted therapeutic strategy against pancreatic cancer cells[3].
- Clinical Evaluations: The PANCRIT-1 trial, a significant phase III clinical evaluation, was initiated to assess the drug's efficacy in metastatic pancreatic cancer. However, it was terminated prematurely in March 2016, owing to the lack of observable improvement in overall patient survival[4].
Implications and Future Directions
Pancreatic cancer remains one of the most challenging malignancies to treat, with many experimental drugs failing to provide significant therapeutic benefits in late-stage clinical trials. The experience with Yttrium (90Y) Clivatuzumab Tetraxetan underscores the inherent complexities associated with developing effective treatments for this cancer type. While hPAM4-Cide did not demonstrate anticipated efficacy in phase III trials, the insights and data obtained could be foundational for the design of subsequent therapies targeting pancreatic tumors.
Conclusion
The story of Yttrium (90Y) Clivatuzumab Tetraxetan showcases both the potential and challenges in the ongoing quest for impactful pancreatic cancer therapies. It underscores the importance of targeted therapeutic strategies and reaffirms the necessity for continued research and innovation in the oncology realm.
References
- ↑ Gold, D. V., & Goldenberg, D. M. (2018). Antibody targeting of MUC1 in pancreatic cancer. Advances in experimental medicine and biology, 1112, 57-76.
- ↑ Cardillo, T. M., Govindan, S. V., Sharkey, R. M., Trisal, P., & Goldenberg, D. M. (2011). Humanized anti-Trop-2 IgG–SN-38 conjugate for effective treatment of diverse epithelial cancers: preclinical studies in human cancer xenograft models and monkeys. Clinical Cancer Research, 17(10), 3157-3169.
- ↑ Sharkey, R. M., & Goldenberg, D. M. (2011). Cancer radioimmunotherapy. Immunotherapy, 3(3), 349-370.
- ↑ Press Release from Immunomedics, Inc., March 2016.
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Contributors: Prab R. Tumpati, MD
