May 22, 2021
Ashok Muthukrishnan, MD, MS
Targeted Therapies in Oncology, May 2021, Volume 10, Issue 7
With the recent success of lutetium Lu 177 dotatate (Lutathera) therapy for neuroendocrine tumor, the field of theranostics has come under a vivid spotlight in the last couple of years from oncologists, nuclear radiologists, cancer researchers, and the pharmaceutical industry. Although research focused on prostate-specific membrane antigen (PSMA) has been ongoing for almost 2 decades, the timing for the emergence of PSMA theranostics could not have been any better.
Ironically, the term PSMA is not specific to prostate cancer. It is in fact expressed in hepatocellular cancer and glioblastoma and some renal and colon cancers. PSMA is expressed up to 1000 times in prostate cancer, and its degree of expression seems to correlate with tumor dedifferentiation and the presence of metastases. The fact that current conventional imaging is woefully inadequate in detecting low-volume oligometastatic disease burden in prostate cancer makes PSMA targeting valuable from a diagnostic standpoint.
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