BeiGene Presents Preliminary Results on Anti-PD-1 Antibody Tislelizumab in Patients with Microsatellite Instability-High or Mismatch Repair-Deficient Solid Tumors at Annual Meeting of the Chinese Society of Clinical Oncology

On September 20, 2018 BeiGene, Ltd. (NASDAQ: BGNE; HKEX: 06160), a commercial-stage biopharmaceutical company focused on developing and commercializing innovative molecularly-targeted and immuno-oncology drugs for the treatment of cancer, reported its preliminary clinical data from Chinese patients with microsatellite instability-high (MSI-H) or mismatch repair-deficient (dMMR) solid tumors enrolled in an ongoing Phase 1/2 clinical trial of tislelizumab, an investigational anti-PD-1 antibody, at the 21st Annual Meeting of the Chinese Society of Clinical Oncology (CSCO) in Xiamen, China.

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"Tislelizumab is being developed in a broad clinical program as both a monotherapy and in combination with other treatments for a number of potential clinical indications. We are encouraged by the preliminary results presented today with tislelizumab for patients with MSI-H or dMMR solid tumors and are excited about starting a Phase 2 trial in China in patients with advanced forms of these tumors to test our belief that they are sensitive to immune checkpoint inhibition. We hope this further enables the availability of new treatments options, which are urgently needed, especially in China," commented Amy Peterson, M.D., Chief Medical Officer, Immuno-Oncology, at BeiGene.

"This is the first presentation of tislelizumab data in the population of patients with MSI-H or dMMR solid tumors, and we are encouraged by the objective response rate of 29 percent in a difficult-to-treat patient population. Tislelizumab was also generally well-tolerated in these patients," said Lin Shen, M.D., Vice President of Clinical Oncology at Beijing Cancer Hospital and Peking University, and study presenter. "We hope that further study of tislelizumab may lead to a new treatment for patients with these tumors."

Summary of Results from the MSI-H and dMMR Cohorts in the Phase 1/2 Trial

The multi-center, open-label Phase 1/2 trial of tislelizumab as monotherapy in advanced solid tumors in China (CTR20160872) consists of a Phase 1 dose verification component and a Phase 2 component of indication expansion in disease-specific cohorts, which includes MSI-H and dMMR solid tumors.

Data presented at CSCO today are from 22 patients enrolled in the cohort, of which 14 patients with centrally confirmed MSI-H/dMMR tumors were evaluable for antitumor activity per RECIST v1.1 criteria. Patients were treated with tislelizumab at a dose of 200 mg every three weeks. Colorectal cancer was the most common primary tumor type and 82 percent of the study population received one or more prior lines of systemic therapy. At the time of the data cutoff on May 11, 2018, median treatment duration was 2.2 months (0.69-11.1 months), median follow-up time was 4.4 months (0.10-10.7 months), and ten patients remained on treatment.

Adverse events (AEs) assessed by the investigator to be related to treatment occurred in 18 patients (82%). Of those, the most common treatment-related AEs (TRAEs) (occurring in ≥ 15% of patients) were increased bilirubin (36%), increased transaminase (27%), increased blood creatine phosphokinase (23%), anemia (23%) and decreased white blood cell and/or neutrophil count (18%). All of the TRAEs were grades 1 or 2. Immune-related AEs (irAEs) occurred in 13 patients (59%) and many were overlapping with the TRAE cases. All irAEs were grade 1 or 2 as well.

At the time of the data cutoff, the efficacy evaluation was early and 14 patients, including 12 patients with colorectal cancer, with centrally confirmed MSI-H/dMMR tumors were evaluable for response. The objective response rate was 29 percent (four patients, all with colorectal cancer), with the median duration of response still maturing. Additionally, three patients centrally confirmed as negative for MSI-H/dMMR were evaluable for response, and progressive disease was the best response in all three of these patients.

In addition to this Phase 1/2 trial, tislelizumab is being investigated in two pivotal Phase 2 clinical trials in China in relapsed/refractory (R/R) classical Hodgkin’s lymphoma and in urothelial cancer, Phase 3 trials in China and globally in a number of malignancies including non-small cell lung cancer, hepatocellular carcinoma, and esophageal squamous cell carcinoma; as well as two global Phase 2 trials in patients with previously treated hepatocellular carcinoma or with R/R mature T- and NK-cell lymphomas.

About Microsatellite Instability-High or Mismatch Repair Deficient Solid Tumors
Microsatellite instability-high (MSI-H) cancer cells have a greater than normal number of genetic markers called microsatellites, which are short, repeated sequences of DNA. Cancer cells that have large numbers of microsatellites may have defects in the ability to correct mistakes (also known as mismatch repair deficiency, or dMMR) that occur when DNA is copied in the cell. MSI-H and dMMR tumors are found most often in colorectal cancer, other types of gastrointestinal cancer and endometrial cancer, although they may also be found in cancers of the breast, prostate, bladder and thyroid.

About Tislelizumab
Tislelizumab (BGB-A317) is an investigational humanized monoclonal antibody that belongs to a class of immuno-oncology agents known as immune checkpoint inhibitors. Discovered by BeiGene scientists in Beijing, tislelizumab is designed to bind to PD-1, a cell surface receptor that plays an important role in downregulating the immune system by preventing the activation of T-cells. Tislelizumab has demonstrated high affinity and specificity for PD-1. It is potentially differentiated from the currently approved PD-1 antibodies in an engineered Fc region, which is believed to minimize potentially negative interactions with other immune cells, based on preclinical data. Tislelizumab is being developed as a monotherapy and in combination with other therapies for the treatment of a broad array of both solid tumor and hematologic cancers. BeiGene and Celgene Corporation have a global strategic collaboration for the development of tislelizumab in solid tumor cancers outside of Asia (except Japan).

Selinexor Clinical Data to be Presented at the 21st Annual Meeting of the Chinese Society of Clinical Oncology

On September 20, 2018 Karyopharm Therapeutics Inc. (Nasdaq:KPTI), a clinical-stage pharmaceutical company, reported two oral presentations and one poster presentation highlighting previously reported clinical data relating to selinexor, the Company’s lead, oral Selective Inhibitor of Nuclear Export (SINE) compound at the 21st Annual Meeting of the Chinese Society of Clinical Oncology (CSCO) 2018 taking place September 19-23, 2018 in Xiamen, China (Press release, Karyopharm, SEP 20, 2018, View Source [SID1234529501]).

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"Given our recently executed strategic alliance with Antengene Corporation to develop selinexor in China, we are honored to share these key results from the STORM, STOMP and SADAL studies with the medical oncology community this year at CSCO," said Sharon Shacham, PhD, Founder, President and Chief Scientific Officer of Karyopharm. "The CSCO annual meeting is among the most prestigious oncology conferences in China and presenting these important data further our goal of advancing selinexor in this important market and across the globe."

Details for the presentations at CSCO:

Oral presentations

Title: Phase 2b Results of the STORM Study: Oral Selinexor plus Low Dose Dexamethasone (Sd) in Patients with Penta-Refractory Myeloma (penta-MM)
Date and Time: Friday, September 21, 2018, from 16:42 to 16:50

Title: Single Agent Oral Plus Selinexor Exhibits Durable Responses in Relapsed/Refractory Diffuse Large B-Cell Lymphoma (DLBCL) of Both GCB and Non-GCB Subtypes: The Phase 2b SADAL Study
Date and Time: Saturday, September 22, 2018 from 8:45 to 8:55

ePoster presentation

Title: Selinexor Plus Low-Dose Bortezomib and Dexamethasone (SVd) Induces a High Response Rate in Patients with Relapsed or Refractory Multiple Myeloma (RRMM)
Date and Time:Thursday, September 20 – Sunday, September 23, 2018

About Selinexor

Selinexor is a first-in-class, oral Selective Inhibitor of Nuclear Export (SINE) compound. Selinexor functions by binding with and inhibiting the nuclear export protein XPO1 (also called CRM1), leading to the accumulation of tumor suppressor proteins in the cell nucleus. This reinitiates and amplifies their tumor suppressor function and is believed to lead to the selective induction of apoptosis in cancer cells, while largely sparing normal cells. To date, over 2,600 patients have been treated with selinexor. In April and September 2018, Karyopharm reported positive top-line data from the Phase 2b STORM study evaluating selinexor in combination with low-dose dexamethasone in patients with penta-refractory multiple myeloma. Selinexor has been granted Orphan Drug Designation in multiple myeloma and Fast Track designation for the patient population evaluated in the STORM study. Karyopharm has submitted a New Drug Application (NDA) to the U.S. Food and Drug Administration (FDA), with a request for accelerated approval for oral selinexor as a new treatment for patients with penta-refractory multiple myeloma. The Company also plans to submit a Marketing Authorization Application (MAA) to the European Medicines Agency (EMA) in early 2019 with a request for conditional approval. Selinexor is also being evaluated in several other mid- and later-phase clinical trials across multiple cancer indications, including in multiple myeloma in a pivotal, randomized Phase 3 study in combination with Velcade (bortezomib) and low-dose dexamethasone (BOSTON), as a potential backbone therapy in combination with approved therapies (STOMP), in diffuse large B-cell lymphoma (SADAL), liposarcoma (SEAL), and an investigator-sponsored study in endometrial cancer (SIENDO), among others. Additional Phase 1, Phase 2 and Phase 3 studies are ongoing or currently planned, including multiple studies in combination with approved therapies in a variety of tumor types to further inform Karyopharm’s clinical development priorities for selinexor. Additional clinical trial information for selinexor is available at www.clinicaltrials.gov.

Galera Therapeutics Raises $150 Million for GC4419 Phase 3 Trial and Pre-Commercialization Activities in Lead Indication

On September 19, 2018 Galera Therapeutics, Inc., a clinical-stage biotechnology company focused on the development of drugs targeting oxygen metabolic pathways with the potential to transform cancer radiotherapy, reported it has secured $150 million in a joint, oversubscribed Series C financing and royalty purchase agreement (Press release, Galera Therapeutics, SEP 19, 2018, View Source [SID1234529486]). The financing was led by new investor Clarus, with participation from additional new investors Adage Capital Management, HBM Healthcare Investments, Nan Fung Life Sciences, RA Capital, Rock Springs Capital and Tekla Capital Management LLC. Existing investors Correlation Ventures, Galera Angels, New Enterprise Associates, Novartis Venture Fund, Novo Ventures and Sofinnova Ventures also participated. In addition, Emmett T. Cunningham, Jr., M.D., Ph.D., MPH, Managing Director at Clarus, will join Galera’s Board of Directors.

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The financing includes a $70 million equity raise and an $80 million royalty financing payable from future sales. Per the terms of the royalty purchase agreement, Clarus will receive single-digit future commercial royalties from the sales of GC4419 and a related pipeline asset until the total royalty amount achieves an undisclosed multiple of the initial $80 million, upon which the royalty terminates.

Galera plans to use the proceeds of the combined equity and royalty financings to advance the clinical development of GC4419 into and through a pivotal Phase 3 clinical trial for the treatment of severe oral mucositis (SOM) in patients with head and neck cancer, its lead indication. SOM is one of the most debilitating side effects of radiotherapy, and there are currently no effective therapies to prevent or mitigate it. In a Phase 2b clinical trial, GC4419 demonstrated reductions in the incidence and duration of radiation-induced SOM in patients with locally advanced head and neck cancer.

"This significant raise further validates the dramatic and meaningful results of our randomized Phase 2b clinical trial and the potential of GC4419 to revolutionize radiotherapy. We are grateful for the robust support from existing and new investors as we prepare to advance GC4419 into a pivotal trial for SOM in head and neck cancer patients in the fourth quarter of this year," said Mel Sorensen, M.D., President and CEO of Galera. "The funds provide Galera with ample financial resources to complete the Phase 3 clinical trial, begin commercial planning activities and further explore the potential of GC4419 beyond SOM. We look forward to initiating a supportive care trial of GC4419 in radiation-induced esophagitis and a therapeutic trial in a second cancer indication, as well as continuing to evaluate the safety and anti-tumor effect of GC4419 in our ongoing Phase 1/2 pancreatic cancer clinical trial."

"Galera has generated robust, randomized Phase 2b data supporting the efficacy and safety profile of GC4419. These data, along with Breakthrough and Fast Track designations from the U.S. Food and Drug Administration (FDA), support the promise of GC4419 to transform how radiotherapy is used to treat patients with head and neck malignancies," said Dr. Cunningham. "With its highly differentiated scientific approach and its potential in a number of indications, GC4419 is well-positioned to address serious unmet medical needs. We’re pleased to support Galera as the company moves closer to potentially bringing GC4419 to head and neck cancer patients with SOM who need a new treatment option."

About GC4419

GC4419 is a highly selective and potent small molecule dismutase mimetic that closely mimics the activity of human superoxide dismutase enzymes. GC4419 works to reduce elevated levels of superoxide caused by radiation therapy by rapidly converting superoxide to hydrogen peroxide and oxygen. Left untreated, elevated superoxide can damage noncancerous tissues and lead to debilitating side effects, including oral mucositis (OM), which can limit the anti-tumor efficacy of radiation therapy. Conversion of elevated superoxide to hydrogen peroxide, which is selectively more toxic to cancer cells, can also enhance the effect of radiation on tumors, particularly with stereotactic body radiation therapy (SBRT), which produces high levels of superoxide.

GC4419 has been studied in patients with head and neck cancer, GC4419’s lead indication, for its ability to reduce the incidence and duration of radiation-induced severe oral mucositis. Results from Galera’s 223-patient, double blind, randomized, placebo-controlled Phase 2b clinical trial demonstrated GC4419’s ability to dramatically reduce the duration of SOM from 19 days to 1.5 days (92 percent), the incidence of SOM through completion of radiation by 34 percent and the severity of patients’ OM by 47 percent, while demonstrating acceptable safety when added to a standard radiotherapy regimen. GC4419 is currently being studied in combination with SBRT for its anti-tumor effect in a Phase 1/2 trial of patients with locally advanced pancreatic cancer. In addition, in multiple preclinical studies, GC4419 demonstrated an increased tumor response to radiation therapy while preventing toxicity in normal tissue.

The FDA granted Breakthrough Therapy designation to GC4419 for the reduction of the duration, incidence and severity of SOM induced by radiation therapy with or without systemic therapy. The FDA also granted Fast Track designation to GC4419 for the reduction of the severity and incidence of radiation and chemotherapy-induced OM.

TESARO Announces Participation at Two Investor Conferences

On September 19, 2018 TESARO, Inc. (NASDAQ: TSRO), an oncology-focused biopharmaceutical company, reported its participation in two upcoming investor conferences (Press release, TESARO, SEP 19, 2018, View Source [SID1234529487]). The two conferences are:

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The Cantor Global Healthcare Conference at the InterContinental New York Barclay Hotel on Wednesday, October 3, 2018.Lonnie Moulder, CEO of TESARO, and Mary Lynne Hedley, Ph.D., President and COO of TESARO, are scheduled to present an overview of the Company’s business and development programs at 11:30 AM ET and will also host meetings with investors.

The Leerink Partners Roundtable Series: Rare Disease & Oncology at the Lotte New York Palace on Wednesday, October 3, 2018.Mary Lynne Hedley, Ph.D., President and COO of TESARO, and Timothy Pearson, Executive Vice President and CFO of TESARO, will participate in an analyst-led fireside chat at 1:30 PM ET and will also host meetings with investors.
Live webcasts of the presentations at the Cantor and Leerink Partners conferences will be available by visiting the Investors section of the TESARO website at www.tesarobio.com. Archived replays of these webcasts will be available on the Company’s website for 14 days following the conference.

Exelixis’ Partner Ipsen Announces Health Canada’s Approval of CABOMETYX® (cabozantinib) Tablets for the Treatment of Adults with Previously Treated Advanced Renal Cell Carcinoma

On September 19, 2018 Exelixis, Inc. (NASDAQ:EXEL) reported that its partner Ipsen Biopharmaceuticals Canada Inc. received approval from Health Canada of CABOMETYX (cabozantinib) tablets for the treatment of adults with advanced renal cell carcinoma (RCC) who have received prior vascular endothelial growth factor (VEGF) targeted therapy (Press release, Exelixis, SEP 19, 2018, View Source;p=irol-newsArticle&ID=2368033 [SID1234529488]). Health Canada granted CABOMETYX priority review status, which provided an accelerated review of Ipsen’s new drug submission.

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"The approval of CABOMETYX in Canada helps address a significant unmet need for patients with advanced kidney cancer whose disease has progressed on first-line therapy and who have limited treatments available," said Michael M. Morrissey, Ph.D., President and Chief Executive Officer of Exelixis. "We are glad to be partnering with Ipsen to bring this much needed treatment option to these patients and look forward to our continued collaboration."

The Health Canada approval was based on results of the phase 3 pivotal METEOR trial in which CABOMETYX provided a statistically significant and clinically meaningful improvement in overall survival, progression-free survival and objective response rate as compared with everolimus in patients with advanced RCC who have received prior anti-angiogenic therapy.

Under the terms of the Collaboration Agreement with Ipsen, Exelixis will receive a milestone payment of $5 million for the Health Canada approval. The payment will be made by Ipsen within the next 70 days.

Please see Important Safety Information below and full U.S. prescribing information at View Source

About Advanced Renal Cell Carcinoma

The American Cancer Society’s 2018 statistics cite kidney cancer as among the top ten most commonly diagnosed forms of cancer among both men and women in the U.S.1 The Canadian Cancer Society estimates that kidney cancer is among the top ten most common forms of kidney cancer in Canada, with approximately 6,600 new cases diagnosed in 2017.2 Clear cell RCC is the most common type of kidney cancer in adults.3 If detected in its early stages, the five-year survival rate for RCC is high; for patients with advanced or late-stage metastatic RCC, however, the five-year survival rate is only 12 percent, with no identified cure for the disease.4 Approximately 30,000 patients in the U.S. and 68,000 globally require treatment, and an estimated 14,000 patients in the U.S. each year are in need of a first-line treatment for advanced kidney cancer.4

The majority of clear cell RCC tumors have lower than normal levels of a protein called von Hippel-Lindau, which leads to higher levels of MET, AXL and VEGF.5,6 These proteins promote tumor angiogenesis (blood vessel growth), growth, invasiveness and metastasis.7,8,9,10 MET and AXL may provide escape pathways that drive resistance to VEGF receptor inhibitors.6,7

About the Exelixis and Ipsen Collaboration

In 2016, Exelixis granted Ipsen exclusive rights for the commercialization and further clinical development of cabozantinib outside of the United States and Japan. Under the terms of the Collaboration Agreement with Ipsen, Exelixis is entitled to receive a tiered royalty of 22 percent to 26 percent of annual net sales.

About CABOMETYX (cabozantinib)

CABOMETYX tablets are approved in the United States for the treatment of patients with advanced RCC. CABOMETYX tablets are also approved in: the European Union, Norway, Iceland, Australia, Switzerland and South Korea for the treatment of advanced RCC in adults who have received prior VEGF-targeted therapy; in the European Union for previously untreated intermediate- or poor-risk advanced RCC; and in Canada for adult patients with advanced RCC who have received prior VEGF targeted therapy. In March 2017, the FDA granted orphan drug designation to cabozantinib for the treatment of advanced HCC. On March 28, 2018, Ipsen announced that the European Medicines Agency validated its application for a new indication for cabozantinib as a treatment for previously treated advanced HCC in the European Union. In 2017, Exelixis granted exclusive rights to Takeda Pharmaceutical Company Limited for the commercialization and further clinical development of cabozantinib for all future indications in Japan.

U.S. Important Safety Information

Hemorrhage: Severe and fatal hemorrhages have occurred with CABOMETYX. In two RCC studies, the incidence of Grade ≥ 3 hemorrhagic events was 3% in CABOMETYX-treated patients. Do not administer CABOMETYX to patients that have or are at risk for severe hemorrhage.
Gastrointestinal (GI) Perforations and Fistulas: In RCC studies, fistulas were reported in 1% of CABOMETYX-treated patients. Fatal perforations occurred in patients treated with CABOMETYX. In RCC studies, gastrointestinal (GI) perforations were reported in 1% of CABOMETYX-treated patients. Monitor patients for symptoms of fistulas and perforations, including abscess and sepsis. Discontinue CABOMETYX in patients who experience a fistula which cannot be appropriately managed or a GI perforation.
Thrombotic Events: CABOMETYX treatment results in an increased incidence of thrombotic events. In RCC studies, venous thromboembolism occurred in 9% (including 5% pulmonary embolism) and arterial thromboembolism occurred in 1% of CABOMETYX-treated patients. Fatal thrombotic events occurred in the cabozantinib clinical program. Discontinue CABOMETYX in patients who develop an acute myocardial infarction or any other arterial thromboembolic complication.
Hypertension and Hypertensive Crisis: CABOMETYX treatment results in an increased incidence of treatment-emergent hypertension, including hypertensive crisis. In RCC studies, hypertension was reported in 44% (18% Grade ≥ 3) of CABOMETYX-treated patients. Monitor blood pressure prior to initiation and regularly during CABOMETYX treatment. Withhold CABOMETYX for hypertension that is not adequately controlled with medical management; when controlled, resume CABOMETYX at a reduced dose. Discontinue CABOMETYX for severe hypertension that cannot be controlled with anti-hypertensive therapy. Discontinue CABOMETYX if there is evidence of hypertensive crisis or severe hypertension despite optimal medical management.
Diarrhea: In RCC studies, diarrhea occurred in 74% of patients treated with CABOMETYX. Grade 3 diarrhea occurred in 11% of patients treated with CABOMETYX. Withhold CABOMETYX in patients who develop intolerable Grade 2 diarrhea or Grade 3-4 diarrhea that cannot be managed with standard antidiarrheal treatments until improvement to Grade 1; resume CABOMETYX at a reduced dose.
Palmar-Plantar Erythrodysesthesia (PPE): In RCC studies, palmar-plantar erythrodysesthesia (PPE) occurred in 42% of patients treated with CABOMETYX. Grade 3 PPE occurred in 8% of patients treated with CABOMETYX. Withhold CABOMETYX in patients who develop intolerable Grade 2 PPE or Grade 3 PPE until improvement to Grade 1; resume CABOMETYX at a reduced dose.
Reversible Posterior Leukoencephalopathy Syndrome (RPLS), a syndrome of subcortical vasogenic edema diagnosed by characteristic finding on MRI, occurred in the cabozantinib clinical program. Perform an evaluation for RPLS in any patient presenting with seizures, headache, visual disturbances, confusion or altered mental function. Discontinue CABOMETYX in patients who develop RPLS.
Embryo-fetal Toxicity may be associated with CABOMETYX. Advise pregnant women of the potential risk to a fetus. Advise females of reproductive potential to use effective contraception during CABOMETYX treatment and for 4 months after the last dose.
Adverse Reactions: The most commonly reported (≥25%) adverse reactions are: diarrhea, fatigue, nausea, decreased appetite, hypertension, PPE, weight decreased, vomiting, dysgeusia, and stomatitis.
Strong CYP3A4 Inhibitors: If concomitant use with strong CYP3A4 inhibitors cannot be avoided, reduce the CABOMETYX dosage.
Strong CYP3A4 Inducers: If concomitant use with strong CYP3A4 inducers cannot be avoided, increase the CABOMETYX dosage.
Lactation: Advise women not to breastfeed while taking CABOMETYX and for 4 months after the final dose.
Hepatic Impairment: In patients with mild to moderate hepatic impairment, reduce the CABOMETYX dosage. CABOMETYX is not recommended for use in patients with severe hepatic impairment.