On March 29, 2018 Delcath Systems, Inc. (OTCQB:DCTH), an interventional oncology company focused on the treatment of primary and metastatic liver cancers, reported that a comparative summary of recently published research on the Company’s PHP Therapy was presented at the 2018 Society of Surgical Oncology Annual Cancer Symposium (SSO), held in Chicago, IL March 21-24, 2018 (Press release, Delcath Systems, MAR 29, 2018, View Source;p=RssLanding&cat=news&id=2340305 [SID1234525454]).
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In a presentation entitled Percutaneous Hepatic Perfusion (PHP) in Hepatic Liver Metastases, Jonathan Zager, MD, FACS, Chair of Graduate Medical Education at Moffitt Cancer Center and Professor of Surgery at the University of South Florida School of Medicine, compared the results from the Company’s prior Phase 3 study, published by Hughes, et al (Annals of Surgical Oncology, 2015) with more recent results published by Karydis, et al (Journal of Surgical Oncology, 2017) and Abbott, et al (American Journal of Clinical Oncology, 2017). The Hughes study was conducted from 2005 to 2010, and used an earlier generation of the Melphalan/HDS system, whereas the Karydis and Abbott studies evaluated patients primarily treated with the Generation Two version of the Melphalan/HDS system along with other refinements to the peri- and post-procedure management of patients.
Dr. Zager highlighted that in all three studies results with PHP provided evidence of improved efficacy, with Hughes showing a 5x increase in hPFS over the study control arm (PHP 245 days vs BAC 49 days), and Abbott showing significantly longer hPFS for PHP than treatment with chemoembolization (CE) and Yttrium-90 beads (Y90) (PHP 310 days, CE 80 days, Y-90 54 days). Karydis showed an overall response rate with PHP of 47%, a >84% disease control rate and hPFS of 9.1 months.
Regarding safety, Dr. Zager compared select safety data in the Hughes study conducted with the generation one system with data from the Karydis study conducted primarily in patients treated with the generation two system. The Hughes study was characterized by high percentages of hematologic side effects ranging from 60%-86% (anemia, thrombocytopenia, neutropenia). In the Karydis study, Grade 3 and 4 hematologic side effects (anemia, neutropenia, thrombocytopenia) were seen in approximately 30% of patients treated with PHP. Dr. Zager attributed this improvement in the safety profile to improvements in filtration with the generation two system, improved peri- and post-procedure management of patients, and greater experience in the treating centers. Dr. Zager concluded that PHP Therapy can be administered safely in high-volume cancer centers.
"Dr. Zager’s presentation at SSO provided a very useful overview of the efficacy consistently seen with PHP Therapy in appropriately selected patients, both in our original Phase 3 trial and in the more recent research," said Jennifer K. Simpson Ph.D., MSN, CRNP President and CEO of Delcath. "Importantly, the improvement in the safety profile noted by Dr. Zager provides confidence that our current Phase 3 FOCUS Trial in ocular melanoma liver metastases can address safety concerns expressed by the FDA after our original Phase 3 trial data was submitted, and can meet its objective of supporting an application for FDA approval for this important therapy."