On June 20, 2016 Cellectis (Alternext: ALCLS – Nasdaq: CLLS), a biopharmaceutical company focused on developing immunotherapies based on gene edited CAR T-cells (UCART), reported that the first patient has been treated in the Phase I study of UCART19 in pediatric acute B lymphoblastic leukemia (B-ALL) at the University College of London (UCL) (Press release, Cellectis, JUN 20, 2016, View Source [SID:1234513467]). This UCART19 clinical trial is sponsored by Servier in close collaboration with Pfizer.

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The pediatric Phase I is an open label, non-comparative, monocenter study to evaluate the safety and ability of UCART19 to induce molecular remission in pediatric patients with relapsed or refractory CD19 positive B-cell acute lymphoblastic leukemia ahead of planned allogeneic haematopoeitic stem cell transplantation (allo-HSCT).

Cellectis will receive a milestone payment from Servier of an undisclosed amount.

About UCART19

UCART19 is an allogeneic CAR T-cell product candidate developed for treatment of CD19-expressing hematological malignancies, gene edited with TALEN. UCART19 is initially being developed in chronic lymphocytic leukemia (CLL) and acute lymphoblastic leukemia (ALL). Cellectis’ approach with UCART19 is based on the preliminary positive results from clinical trials using autologous products based on the CAR technology, and has the potential to overcome the limitation of the current autologous approach by providing an allogeneic, frozen, "off-the-shelf" T cell based medicinal product.

In November 2015, Servier acquired the exclusive rights to UCART19 from Cellectis. Following further agreements, Servier and Pfizer began collaborating on a joint clinical development program for this cancer immunotherapy. Pfizer has exclusive rights from Servier to develop and commercialize UCART19 in the United States, while Servier retains exclusive rights for all other countries.

On June 20, 2016 Hutchison China MediTech Limited ("Chi-Med") (AIM/Nasdaq: HCM) reported the initiation of a Phase II expansion of the ongoing TATTON trial (NCT02143466) to evaluate the selective c-Met inhibitor savolitinib (AZD6094) in epidermal growth factor receptor ("EGFR") mutant non-small cell lung cancer ("NSCLC") patients (Press release, Hutchison Medipharma, JUN 20, 2016, http://www.chi-med.com/savolitinib-global-phase-ii-trial-initiated-in-egfr-mutant-non-small-cell-lung-cancer/ [SID:1234513466]).

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Savolitinib has the potential to address major unmet medical needs in c-Met-driven subsets of NSCLC, a disease that is estimated to afflict approximately 1.7 million new patients annually worldwide.

The trial is a single-arm global Phase II study of savolitinib in combination with Tagrisso (osimertinib/AZD9291) in advanced NSCLC patients who have developed resistance to approved EGFR tyrosine kinase inhibitors ("TKIs"). This expansion was initiated following encouraging early data from a number of patients enrolled in the TATTON study who received savolitinib in combination with Tagrisso.

The initiation of the expanded Phase II study has triggered a US$10 million milestone payment to Hutchison MediPharma Limited ("HMP") (a 99.8% held subsidiary of Chi-Med) under the terms of the agreement with AstraZeneca PLC ("AstraZeneca") signed in December 2011. HMP and AstraZeneca are conducting Phase II studies in NSCLC with savolitinib in monotherapy, as well as in combination with either Tagrisso or Iressa (gefitinib). AstraZeneca continues to lead and invest in the global NSCLC development program for savolitinib.

Susan Galbraith, Senior Vice President, Head of Oncology Innovative Medicines, AstraZeneca, said: "Savolitinib is a highly selective c-Met inhibitor that is being investigated in a number of cancers including in patients with lung cancer whose disease is driven by aberrant c-Met / HGF signaling. We are extremely excited by the data we have seen for savolitinib when used in combination with our EGFR tyrosine kinase inhibitors. We are committed to advancing research to develop a broad range of potential treatment options for patients with lung cancer."

Christian Hogg, Chief Executive Officer of Chi-Med, said: "We estimate that the annual incidence of patients with MET-driven NSCLC in the U.S., European Union and Japan totals about 40,000-50,000 in all treatment settings. This is an important unmet medical need and one that we believe savolitinib is well suited to address because of its very high selectivity. This allows for effective target coverage of c-Met, as well as safe and tolerable combinations with other oncology agents. We believe that savolitinib either as a monotherapy in first-line NSCLC, or in proprietary combinations with AstraZeneca’s Iressa and Tagrisso in second- and third-line NSCLC, will address the key genetic drivers of cancer cell proliferation in these very difficult-to-treat NSCLC patients. We are hopeful about proceeding into Phase III in 2017 based on future data from this study."

NSCLC DEVELOPMENT PROGRAM HIGHLIGHTS

Savolitinib continues to be explored in a range of MET-driven NSCLC settings including:

Savolitinib in combination with Tagrisso or Iressa in Phase II expansions of ongoing studies in advanced EGFR mutant NSCLC
Savolitinib + Tagrisso combination Phase II study in third-line NSCLC (for patients progressing on T790M-directed therapies)
Savolitinib monotherapy Phase II study in NSCLC
Savolitinib is in clinical development in multiple MET-driven solid tumor indications including NSCLC, kidney, gastric and colorectal cancer. For a detailed summary of all current savolitinib clinical trials covering multiple patient populations, please click here.



NOTES TO EDITORS
About NSCLC and TKIs to address MET-driven and EGFR-driven NSCLC

Every year, it is estimated that approximately 1.7 million new patients around the world are diagnosed with NSCLC, according to Frost & Sullivan. Lung cancer is the leading cause of cancer death among both men and women, accounting for about one-third of all cancer deaths, and more than breast, prostate and colorectal cancers combined. TKIs are used in many cancer therapies and act by blocking the cell signaling pathways that drive the growth of tumor cells.

Around 4-5% of first-line NSCLC patients have MET-driven NSCLC, including approximately 3-4% with MET Exon-14 mutations and approximately 1-2% with c-Met gene amplification, and are generally sensitive to treatment with selective c-Met inhibitors such as savolitinib. Currently there are no approved selective c-Met TKIs for these NSCLC patients.

Separately, patients who have the EGFR mutation form of NSCLC, which occurs in an estimated 10-15% of NSCLC patients in Europe and 30-40% of NSCLC patients in Asia, are particularly sensitive to treatment with currently available EGFR-TKIs. However, tumors almost always develop resistance to treatment leading to disease progression, with median progression-free periods of approximately nine months. Among NSCLC patients treated with the approved EGFR-TKIs Iressa, Tarceva (erlotinib) or Gilotrif (afatinib), who build resistance to EGFR-TKIs and thus become second-line patients, approximately half of this resistance is driven by T790M, and approximately one-fifth is driven by c-Met gene amplification.

In third-line NSCLC patients treated with EGFR T790M mutation-positive TKIs, resistance pathways are only beginning to emerge as more patients are being treated with TKIs in clinical trials and Tagrisso was approved in the U.S., European Union, Japan and South Korea. Data is limited, but as patients become resistant to Tagrisso (median progression-free survival of nine months), c-Met gene amplification is emerging as a resistance pathway of significant interest.



About savolitinib, a uniquely selective c-Met inhibitor

Savolitinib is a potential global first-in-class inhibitor of c-Met (also known as mesenchymal epithelial transition factor) receptor tyrosine kinase, an enzyme which has been shown to function abnormally in many types of solid tumors. It was developed as a potent and highly selective oral inhibitor specifically designed to address issues observed in the clinic with first-generation c-Met inhibitors, including renal toxicity.



About Tagrisso, a selective inhibitor against EGFR and T790M mutations

Tagrisso (osimertinib) 80mg once-daily tablet, developed by AstraZeneca, is the first medicine indicated for the treatment of adult patients with locally advanced or metastatic EGFR T790M mutation-positive NSCLC. Non-clinical in vitro studies have demonstrated that osimertinib has high potency and inhibitory activity against mutant EGFR phosphorylation across the range of clinically relevant EGFRm and T790M mutant NSCLC cell lines, with significantly less activity against EGFR in wild-type cell lines.

Tagrisso is being compared with platinum-based doublet chemotherapy in the confirmatory AURA3 Phase III study in patients with EGFR T790M-positive, locally advanced or metastatic NSCLC who have progressed after EGFR-TKI therapy. It is also being investigated in the adjuvant and metastatic first-line settings, including in patients with and without brain metastases, in leptomeningeal disease, and in combination treatment.

About Iressa, an EGFR mutation inhibitor

Iressa (gefitinib) is a targeted monotherapy developed by AstraZeneca for the treatment of patients with advanced or metastatic EGFR mutation-positive NSCLC. Iressa acts by inhibiting the tyrosine kinase enzyme in the EGFR, thus blocking the transmission of signals involved in the growth and spread of tumors. EGFR mutations occur in approximately 10-15% of NSCLC Caucasian patients and 30-40% of NSCLC patients in Asia. Iressa is approved in 91 countries worldwide.