The Lynx Group

ASCO 2021 Highlights

In patients with metastatic urothelial cancer who received previous therapy, as well as in cisplatin-ineligible patients with this cancer, enfortumab vedotin-ejfv (Padcev) improved overall survival (OS), according to new data presented at the 2021 ASCO Genitourinary Cancers Symposium. The data come from the phase 3 EV-301 study and cohort 2 of the phase 2 EV-201 study. Experts believe this antibody–drug conjugate will become a new standard of care in the treatment of patients with advanced urothelial cancer.
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Bemarituzumab, an investigational first-in-class humanized immunoglobulin G1 monoclonal antibody that selectively binds to FGFR2b, improved progression-free survival (PFS) and overall survival (OS) when added to the modified FOLFOX6 (mFOLFOX6) chemotherapy in patients with FGFR2b-positive advanced gastric or gastroesophageal junction (GEJ) cancer in the phase 2 FIGHT randomized clinical trial. The results were presented at the 2021 ASCO Gastrointestinal Cancers Symposium.
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A small-molecule CD73 inhibitor (AB680) induced a 41% overall response rate (ORR) when combined with chemotherapy (with nab-paclitaxel and gemcitabine), plus the novel PD-1 inhibitor zimberelimab, as a first-line treatment for patients with metastatic pancreatic ductal adenocarcinoma, according to results of the dose-escalation portion of a phase 1/1b study known as ARC-8.
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The HER2-targeted bispecific investigational antibody zanidatamab, either as monotherapy or in combination with chemotherapy, has shown promising antitumor activity in an ongoing phase 1 study of patients with HER2-expressing biliary tract cancer or gastroesophageal adenocarcinoma, reported Funda Meric-Bernstam, MD, Chair, Department of Investigational Cancer Therapeutics, M.D. Anderson Cancer Center, Houston, TX, at the 2021 ASCO Gastrointestinal Cancers Symposium.
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Final results from the phase 3 clinical trial ClarIDHy showed that ivosidenib (Tibsovo), a first-in-class oral inhibitor of isocitrate dehydrogenase 1 (IDH1) mutation, prolonged the median overall survival (OS) in patients with previously treated advanced cholangiocarcinoma (CCA) and IDH1 mutation. Although this improvement did not reach statistical significance, after adjusting for crossovers from the placebo to the ivosidenib group, the difference in median OS was statistically significant.
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Belzutifan, an oral, novel hypoxia-inducible factor (HIF)-2α inhibitor, showed encouraging activity as a single agent in heavily pretreated patients with advanced clear-cell renal-cell carcinoma (RCC) associated with von Hippel-Lindau (VHL) disease, as well as impressive tumor shrinkage when used in combination with cabozantinib (Cabometyx) in separate studies presented at the 2021 ASCO Genitourinary Cancers Symposium.
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Cabazitaxel (Jevtana) is approved as third-line therapy for patients with metastatic castration-resistant prostate cancer (CRPC) after treatment with docetaxel and an androgen receptor inhibitor. A new phase 2 clinical trial shows that the radionuclide therapy that targets the prostate-specific membrane antigen (PSMA), 177Lu-PSMA-617, reduced the risk for disease progression or death by 37% compared with cabazitaxel in men with previously treated metastatic CRPC. Moreover, the TheraP study showed that patients who received 177Lu-PSMA-617 had fewer side effects and improved quality of life compared with patients who received cabazitaxel.
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The combination of nivolumab (Opdivo) plus cabozantinib (Cabometyx) continued to show superior survival outcomes compared with single-agent sunitinib (Sutent) as first-line treatment for patients with advanced renal-cell carcinoma (RCC), according to extended follow-up data from the phase 3 CheckMate-9ER clinical trial presented at the 2021 ASCO Genitourinary (GU) Cancers Symposium.
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