On June 10, 2019 The U.S. Food and Drug Administration granted accelerated approval to Polivy (polatuzumab vedotin-piiq), in combination with the chemotherapy bendamustine and a rituximab product (a combination known as "BR"), to treat adult patients with diffuse large B-cell lymphoma (DLBCL) that has progressed or returned after at least two prior therapies (Press release, US FDA, JUN 10, 2019, View Source [SID1234536966]). Polivy is a novel antibody-drug conjugate, and DLBCL is the most common type of non-Hodgkin lymphoma.

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"Antibody-drug conjugates are an emerging class of targeted immunotherapies for cancer. This type of therapy, unlike traditional chemotherapy, is intended to target specific cells," said Richard Pazdur, M.D., director of the FDA’s Oncology Center of Excellence and acting director of the Office of Hematology and Oncology Products in the FDA’s Center for Drug Evaluation and Research. "Today’s approval of Polivy provides an alternative option for patients in whom multiple treatments have not worked."

More than 18,000 people are diagnosed with DLBCL each year in the U.S. Although it can be cured, about 30 to 40% of patients suffer relapse. This type of cancer grows quickly in the lymph nodes and may affect the bone marrow, spleen, liver or other organs. Signs and symptoms of DLBCL may include swollen lymph nodes, fever, recurring night sweats and weight loss.

Polivy is an antibody that is attached to a chemotherapy drug. Polivy binds to a specific protein (called CD79b) found only on B cells (a type of white blood cell), then releases the chemotherapy drug into those cells. Efficacy was evaluated in a study of 80 patients with relapsed or refractory DLBCL who were randomized to receive Polivy with BR or BR alone. Efficacy was based on complete response rate and duration of response (DOR), defined as the time the disease stays in remission. At the end of treatment, the complete response rate was 40% with Polivy plus BR compared to 18% with BR alone. Of the 25 patients who achieved a partial or complete response to Polivy plus BR, 16 (64%) had a DOR of at least six months and 12 (48%) had a DOR of at least 12 months.

The most common side effects of Polivy plus BR include low levels of white blood cells (neutropenia), platelets (thrombocytopenia) and red blood cells (anemia); nerve damage (peripheral neuropathy); fatigue; diarrhea; fever; decreased appetite; and pneumonia.

Health care professionals are advised to monitor patients closely for infusion-related reactions, low blood counts and fatal and/or serious infections. Health care professionals should also monitor patients for tumor lysis syndrome (a complication from many tumor cells being killed off at the same time), liver damage (hepatotoxicity) and progressive multifocal leukoencephalopathy (PML), a fatal or life-threatening infection of the brain. FDA advises health care professionals to tell females of reproductive age to use effective contraception during treatment with Polivy and for three months after the last dose. Women who are pregnant or breastfeeding should not take Polivy because it may cause harm to a developing fetus or newborn baby.

Polivy in combination with BR was granted accelerated approval, which enables the FDA to approve drugs for serious conditions to fill an unmet medical need based on an endpoint that is reasonably likely to predict a clinical benefit to patients. Further clinical trials are required to verify and describe Polivy’s clinical benefit.

The FDA granted this application Breakthrough Therapy and Priority Review designations. Polivy also received Orphan Drug designation, which provides incentives to assist and encourage the development of drugs for rare diseases. The FDA granted the approval of Polivy to Genentech.

The FDA, an agency within the U.S. Department of Health and Human Services, protects the public health by assuring the safety, effectiveness, and security of human and veterinary drugs, vaccines and other biological products for human use, and medical devices. The agency also is responsible for the safety and security of our nation’s food supply, cosmetics, dietary supplements, products that give off electronic radiation, and for regulating tobacco products.

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On June 10, 2019 Sesen Bio (Nasdaq: SESN), a late-stage clinical company developing targeted fusion protein therapeutics for patients with cancer, reported that it has completed a successful Type B Pre-Biologics License Application (BLA) meeting regarding the approval path for Vicinium for the treatment of patients with high-risk, Bacillus Calmette-Guérin (BCG) unresponsive, non-muscle invasive bladder cancer (NMIBC) (Press release, Eleven Biotherapeutics, JUN 10, 2019, View Source [SID1234536965]). The Company has reached alignment with the U.S. Food and Drug Administration (FDA) on an Accelerated Approval Pathway for Vicinium along with Rolling Review, and the Company expects to initiate submission of the BLA in the fourth quarter of 2019. The FDA also indicated that the nonclinical data, the clinical pharmacology data, and the safety database are sufficient to support a BLA submission, and that no additional clinical trials are necessary for a BLA submission.

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Rolling Review of the BLA enables individual modules to be submitted and reviewed on an ongoing basis, rather than waiting for all sections to be completed before submission. The final module submission for the BLA will be CMC, and Sesen Bio plans to meet with the FDA in the second half of 2019 to discuss the content and timing of that module.

"We have now had two successful meetings with the FDA over the last three weeks, which build on our long-term relationship with the Agency and make our regulatory path forward for Vicinium even more clear," said Dr. Thomas Cannell, president and chief executive officer of Sesen Bio. "Gaining alignment with the FDA on an Accelerated Approval Pathway, in addition to a rolling review of the BLA, significantly increases our confidence in our regulatory pathway and our ability to bring a product to market that has the potential to save and improve the lives of patients."

On May 21, 2019 Sesen Bio announced a positive outcome from its previous meeting with the FDA, a Type C CMC meeting, where Sesen Bio reached agreement with the FDA on the Analytical Comparability Plan, and confirmed, subject to final comparability data to be provided in the BLA submission, that no additional clinical trials were deemed necessary for comparability.

Sesen Bio plans to schedule two additional meetings with the FDA in the second half of 2019, a Type C meeting to discuss the details of a post-marketing confirmatory trial in support of the Accelerated Approval Pathway for Vicinium, and a Type B CMC meeting to discuss the submission strategy of the CMC module.

Conference Call Information
To participate in the conference call, please dial (844) 831-3025 (domestic) or (315) 625-6887 (international) and refer to conference ID 2958515. The webcast can be accessed in the Investor Relations section of the company’s website at www.sesenbio.com. The replay of the webcast will be available in the investor section of the company’s website at www.sesenbio.com for 60 days following the call.

About Vicinium
Vicinium, a locally-administered fusion protein, is Sesen Bio’s lead product candidate being developed for the treatment of high-risk non-muscle invasive bladder cancer (NMIBC). Vicinium is comprised of a recombinant fusion protein that targets epithelial cell adhesion molecule (EpCAM) antigens on the surface of tumor cells to deliver a potent protein payload, Pseudomonas Exotoxin A. Vicinium is constructed with a stable, genetically engineered peptide tether to ensure the payload remains attached until it is internalized by the cancer cell, which is believed to decrease the risk of toxicity to healthy tissues, thereby improving its safety. In prior clinical trials conducted by Sesen Bio, EpCAM has been shown to be overexpressed in NMIBC cells with minimal to no EpCAM expression observed on normal bladder cells. Sesen Bio is currently conducting the Phase 3 VISTA trial, designed to support the registration of Vicinium for the treatment of high-risk NMIBC in patients who have previously received a minimum of two courses of Bacillus Calmette-Guérin (BCG) and whose disease is now BCG-unresponsive. Additionally, Sesen Bio believes that Vicinium’s cancer cell-killing properties promote an anti-tumor immune response that may potentially combine well with immuno-oncology drugs, such as checkpoint inhibitors. The activity of Vicinium in BCG-unresponsive NMIBC is also being explored at the US National Cancer Institute in combination with AstraZeneca’s immune checkpoint inhibitor durvalumab.

On June 10, 2019 PharmaCyte Biotech, Inc. (OTCQB: PMCB), a clinical stage biotechnology company focused on developing targeted cellular therapies for cancer and diabetes using its signature live-cell encapsulation technology, Cell-in-a-Box, reported that its Chief Executive Officer, Kenneth L. Waggoner, and his team are now in Bangkok, Thailand (Press release, PharmaCyte Biotech, JUN 10, 2019, View Source [SID1234536964]). They have been attending meetings on site at Austrianova’s GMP manufacturing facility. Production of PharmaCyte’s clinical trial material for the treatment of locally advanced, non-metastatic, inoperable pancreatic cancer (LAPC) is already underway.

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On Tuesday, June 11, Mr. Waggoner and PharmaCyte’s consultant cellular biologist, David A. Judd, will observe and assist the team from Austrianova, if needed, as they continue their work to produce the necessary clinical trial material for PharmaCyte’s planned clinical trial for LAPC.

PharmaCyte’s Chief Executive Officer, Kenneth L. Waggoner, said of the necessity to be on the ground at the GMP production facility, "We are at a very crucial point on our path to a clinical trial. The production of our clinical trial material is vital to our success in the clinic, and it is vital to advancing our clinical development timeline. We need the testing of the finished cancer product to get underway. The data from those tests should enable us to complete our Investigational New Drug application (IND). After the changes Austrianova made to the manufacturing process, about which we have already reported, we are back on track. We’ll be here in Thailand overseeing the production runs that will produce the clinical trial material PharmaCyte needs to continue its journey to the clinic."

Also, a film crew will be on hand to document the company’s manufacturing process for the production of a video that will tell PharmaCyte’s pancreatic cancer therapy story in its entirety.

As a reminder, Mr. Judd has a broad array of experience in development of cell culture media for many primary cells and cell lines and is particularly knowledgeable in the growth of HEK-293 cells. He has developed manufacturing processes, cell assays, biochemical analysis, cell culture processes and downstream recovery strategies for over 35 years, 30 of which have been with a major biotechnology company in the United States.

On June 10, 2019 Oncternal Therapeutics, Inc., (Nasdaq: ONCT) a clinical-stage biotechnology company developing potential first-in-class product candidates for cancers with critical unmet medical need, reported that the reverse merger with GTx, Inc., closed on June 7, 2019 (Press release, GTx, JUN 10, 2019, View Source [SID1234536962]). The combined company will operate under the name Oncternal Therapeutics, Inc., and its shares will commence trading on the Nasdaq stock exchange on June 10, 2019, under the ticker symbol "ONCT."

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"We believe that the closing of the merger signifies a transformative event that will provide Oncternal with the opportunity to achieve its next level of corporate growth as we continue to advance our promising oncology drug candidates through development," said James Breitmeyer, M.D., Ph.D., Oncternal’s President and CEO. "We recently presented updated interim data from an ongoing clinical study of our investigational monoclonal antibody, cirmtuzumab, at the American Society of Clinical Oncology (ASCO) (Free ASCO Whitepaper) Annual Meeting, and we look forward to achieving a number of exciting milestones in our development programs in the future."

Pursuant to the merger, all of Oncternal’s outstanding shares of common stock and securities convertible into or exercisable for Oncternal’s common stock were converted into GTx common stock and securities convertible into or exercisable for GTx common stock. Immediately following the completion of the merger, the former stockholders of Oncternal held approximately 77.5% of the outstanding shares of common stock of the combined company. In addition to retaining an ownership interest representing approximately 22.5% of the outstanding shares of common stock of the combined company, the GTx stockholders of record as of immediately prior to the effective time of the merger received contingent value rights (CVR) entitling the holders to receive, in the aggregate, 75% of any net proceeds derived from the grant, sale or transfer of rights to GTx’s selective androgen receptor degrader (SARD) and selective androgen receptor modulator (SARM) technology during the term of the CVR and, if applicable, to receive royalties on the sale of any SARD products by the combined company during the term of the CVR.

Oncternal’s development pipeline consists of the following programs:

Oncternal’s lead program, cirmtuzumab, is an investigational, potential first-in-class anti-receptor tyrosine kinase-like orphan receptor 1 (ROR1) monoclonal antibody. Cirmtuzumab is currently in a Phase 1/ 2 clinical trial in combination with ibrutinib for the treatment of chronic lymphocytic leukemia (CLL) and mantle cell lymphoma (MCL). Last week, the company presented interim data from the study at the ASCO (Free ASCO Whitepaper) 2019 Annual Meeting. In addition, an investigator-initiated Phase 1 clinical trial of cirmtuzumab in combination with paclitaxel for women

with metastatic breast cancer is being conducted at the University of California San Diego (UC San Diego) School of Medicine. The California Institute for Regenerative Medicine (CIRM) has provided funding to support the cirmtuzumab development program.

TK216, an investigational, potential first-in-class small molecule designed to inhibit the biological activity of E26 transformation-specific (ETS) oncoproteins, is being evaluated alone and in combination with vincristine in a Phase 1 clinical trial in patients with relapsed or refractory Ewing sarcoma, a rare pediatric cancer. Oncternal is also planning a Phase 1 clinical trial in patients with relapsed acute myeloid leukemia (AML).

A ROR-1 targeted chimeric antigen receptor T-cell (CAR-T) program is in preclinical development in collaboration with UC San Diego for hematologic cancers and solid tumors.

On June 9, 2019 CStone Pharmaceuticals ("CStone"; HKEX: 2616) reported that the company has entered into a global clinical collaboration with China focus with Bayer HealthCare LLC to evaluate the safety, tolerability, pharmacokinetics (PK) and antitumor activity of its PD-L1 monoclonal antibody CS1001 in combination with Bayer’s regorafenib, an oral multi-kinase inhibitor (targeting VEGFR, FGFR, CSF1R, etc.), as a treatment for multiple cancers including gastric cancer (Press release, CStone Pharmaceauticals, JUN 9, 2019, View Source [SID1234536959]). This is the first global proof of concept study carried out as a collaboration between the two companies. CStone will be the study sponsor and Bayer will provide regorafenib throughout the clinical trial program.

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Professor Lin Shen, Vice President at the Peking University Cancer Hospital, commented: "At present, patients with advanced gastric cancer lack safe and effective therapies. Preclinical and clinical evidence suggest that the combination of PD-1/PD-L1 antibodies with multi-kinase inhibitors that target VEGFR can induce significant synergistic anti-tumor effects. We hope this combination therapy can provide a new treatment option for patients suffering from gastric cancer and other serious malignancies."

CS1001 is one of CStone’s backbone immuno-oncology pipeline candidates, having demonstrated that it is well-tolerated and has promising anti-tumor activities across a variety of tumor types in clinical studies. Currently, CS1001 is being evaluated in 7 clinical trials, including 5 pivotal trials. Regorafenib is approved in over 90 countries for the treatment of metastatic colorectal cancer (mCRC) and metastatic gastrointestinal stromal tumors (GIST) and in more than 80 countries for the second-line treatment of advanced hepatocellular (HCC).

Dr. Frank Jiang, CStone Chairman and CEO, commented: "We are very pleased that Bayer has chosen CStone as its partner and recognizes CS1001’s potential. We hope, by complementing our two companies’ pipelines via this combination therapy, that we can develop better cancer treatments for patients. In addition, this collaboration will be a big step forward for CStone’s global strategy when we generate positive data."

Scott Z. Fields, M.D., Senior Vice President and Head of Oncology Development at Bayer’s Pharmaceutical Division said: "Combining multi-kinase inhibitors, such as regorafenib, with checkpoint inhibitors is a rising trend in cancer therapy in order to find new solutions for the many treatment gaps that still remain for patients. We look forward to collaborating with CStone, an innovative biopharmaceutical company, and exploring regorafenib’s potential."

About CS1001

CS1001 is an investigational anti-PD-L1 monoclonal antibody being developed by CStone. Authorized by the U.S.-based Ligand Corporation, CS1001 was generated by the OMT transgenic animal platform, which can produce fully human antibodies in one step. As a fully human, full-length anti-PD-L1 monoclonal antibody, CS1001 mirrors natural G-type immune globulin 4 (IgG4) human antibody, which can potentially reduce the risk of immunogenicity and toxicities in patients, a unique advantage over similar drugs.

CS1001 has completed a Phase I dose-escalation study in China and has demonstrated promising anticancer activity and good tolerance. CS1001 is currently being evaluated in multiple clinical trials including a bridging phase I trial in the USA, a multi-arm phase Ib study, two pivotal Phase II studies and three Phase III studies in China in various cancer types, respectively. It has not been approved by any health authority for marketing.

About Regorafenib (Stivarga)

Regorafenib is an oral multi-kinase inhibitor that potently blocks multiple protein kinases involved in tumor angiogenesis (VEGFR1, -2, -3, TIE2), oncogenesis (KIT, RET, RAF-1, BRAF), metastasis (VEGFR3, PDGFR, FGFR) and tumor immunity (CSF1R).

Regorafenib is approved under the brand name Stivarga in more than 90 countries worldwide, including the U.S., countries of the EU, China and Japan for the treatment of metastatic colorectal cancer (mCRC) and metastatic gastrointestinal stromal tumors (GIST). The product is also approved in more than 80 countries including the U.S., Japan, countries of the EU as well as China for the second-line treatment of advanced hepatocellular (HCC).

Regorafenib is a compound developed by Bayer. In 2011, Bayer entered into an agreement with Onyx, now an Amgen subsidiary, under which Onyx receives a royalty on all global net sales of regorafenib in oncology.