Chi-Med Highlights Surufatinib Phase III Results in Neuroendocrine Tumors at ESMO 2020 and Publications in The Lancet Oncology

― Phase III SANET-p demonstrated surufatinib reduces the risk of disease progression or death by 51% in patients with pancreatic neuroendocrine tumors (“NET”) ―

― SANET-p results complement previously presented positive Phase III SANET-ep results in patients with non-pancreatic NET, including across multiple subgroups ―

― Results of both SANET-p and SANET-ep studies published in The Lancet Oncology –

HONG KONG and SHANGHAI, China and FLORHAM PARK, N.J., Sept. 20, 2020 (GLOBE NEWSWIRE) -- Hutchison China MediTech Limited (“Chi-Med”) (Nasdaq/AIM: HCM) today announces that positive results of the Phase III study of surufatinib in advanced neuroendocrine tumors – pancreatic (“SANET-p”) were presented as a proffered paper session at the European Society for Medical Oncology (“ESMO”) Virtual Congress 2020 (Abstract Number 1156O). Results from SANET-p, in addition to previously presented results from Phase III study of surufatinib in advanced neuroendocrine tumors – extra-pancreatic (“SANET-ep”), are published today in The Lancet Oncology.

“Surufatinib demonstrated statistically significant and clinically meaningful benefits in patients with advanced pancreatic NET. These results, combined with positive results from the parallel study of surufatinib in patients with non-pancreatic NET, support surufatinib as a promising treatment option for well-differentiated NET patients regardless of tumor origin,” commented Dr. Jianming Xu, lead investigator for the SANET-p study, Head of the Department of Gastrointestinal Oncology, The Fifth Medical Center, General Hospital of the PLA in Beijing.

As announced in January 2020, the Independent Data Monitoring Committee (“IDMC”) for the SANET-p trial recommended that the study stop early because it had met the pre-defined primary endpoint of progression free survival (“PFS”) during a planned interim analysis. At data cut-off as of November 11, 2019, 172 patients were randomized 2:1 to treatment with either 300 mg of surufatinib orally daily (N=113) or placebo control (N=59), on a 28-day cycle. Median PFS was 10.9 months for patients treated with surufatinib, as compared to 3.7 months for patients in the placebo group (hazard ratio [“HR”] 0.491; 95% confidence interval [“CI”] 0.391-0.755; p=0.0011). Benefit was observed across most major subgroups of pNET patients. Objective response rates (ORR) were 19.2%¹ for the 104 efficacy evaluable patients in the surufatinib group versus 1.9%² for the 53 efficacy evaluable patients in the placebo group, with a disease control rate (DCR) of 80.8% versus 66.0%, respectively. Most patients in the trial had Grade 2 disease with heavy tumor burden, including liver metastasis and multiple organ involvement. Efficacy was also supported by Blinded Independent Image Review Committee (BIIRC) assessment, with a median PFS of 13.9 months for surufatinib as compared to 4.6 months for placebo (HR 0.339; 95% CI 0.209-0.549; p<0.0001).