Checkmate Pharmaceuticals Appoints David Mauro, M.D., Ph.D., as Chief Medical Officer and Announces Dosing of First Patient in Immuno-Oncology Phase 1b Trial with CMP-001, a TLR9 Agonist

On April 20, 2016 Checkmate Pharmaceuticals , a clinical-stage biopharmaceutical company focused on developing novel approaches for cancer immunotherapy, reported the appointment of David Mauro, M.D., Ph.D . to the newly created position of Chief Medical Officer. Checkmate also announced the dosing of the first patient in a Phase 1b trial with CMP-001 in combination with pembrolizumab in melanoma patients who have either progressed on or failed to respond to at least 12 weeks of anti -‐ PD1 therapy. CMP -‐ 001 is a first -‐ in -‐ class CpG -‐ A oligonucleotide that activates the innate immune system via Toll -‐ like receptor 9 (TLR9) (Press release, Checkmate Pharmaceuticals, APR 20, 2016, View Source [SID1234516800]). The combination therapy has the potential to increase the proportion of cancer patients who respond to checkpoint inhibitor therapies and to increase the magnitude and duration of the anti -‐ tumor responses , providing added clinical benefit . Industry Veteran with Immun o -‐ Oncology Clinical Development and Leadership Expertise Dr. Mauro brings to Checkmate more than 15 years of experience in early and late stage oncology drug development, clinical and translational research , and medical affairs. Previously he served as Exe cu tive Vice President and Chief Medical Officer at Advaxis , where he was responsible for the strategy and oversight of the company’s clinical programs, including several combination drug programs with checkpoint inhibitor s . "We welcome David to the Checkmate team at this pivotal time ," said Art Krieg, M.D., Chief E xecutive Officer of Checkmate. " His deep knowledge and experience in immuno -‐ oncology , and specifically in the development of checkpoint inhibitor combinations, will be invaluable to Checkmate in the clinical development of CMP -‐ 001 for patients with advanced cancer ." Dr. Mauro has held senior level positions at Merck & Co. and Bristol Myers Squibb Company, where he was involved in the clinical development, trans la tional science , and life cycle management for multiple programs , including Keytruda ( pembrolizumab ), Erbitux (cetuximab), Sprycel (dasatinib), and Sylatron (peginterferon alfa -‐ 2b). He received his Bachelor of Science in Bioch emistry from Cornell University, his medical degree and his doctorate in pharmacology from Temple Univ ersity School of Medicine , and completed his residency training at the National Cancer Institute. A s Chief Medical Officer at Checkmate, Dr. Mauro will oversee the development of the Company’s current and future clinical programs, based on the TLR9 mechani sm of immune activation. " I am excited to be joining Checkmate as it progress es CMP -‐ 001 into the clinic in itially in melanoma patients ," said Dr. Mauro. "I look forward to working with the team to further expand the development of this compound in other indications and checkpoint inhibitor combinations . The immun o -‐ oncology field is evolving rapidly , and I believe that CMP -‐ 001 has the potential to increase the response rates to current checkpoint therapies a nd have a broad impact in the development of new standards of care f or oncology treatment." Initiation of Phase 1b Trial in Advanced Melanoma with a TLR9 Immune Activator Checkmate has dosed the first patient in its Phase 1b clinical study of CMP -‐ 001 . Th e trial is designed as a multi -‐ center, open -‐ label study of CMP -‐ 001 in combination with pembrolizumab for patients with advanced melanoma who have either progressed on an anti -‐ PD1 , or have failed to respond to at least 12 weeks of therapy . Patients will c ontinue on the approved dose and schedule of pembrolizumab, with the addition of intratumoral CMP -‐ 001 therapy. The trial will include a dose escalation study and will enroll patients in an expansion phase , as well as undertake correlative studies to characterize the immune effects of treatment in the blood and tumor. P atients will be monitored for safety and tolerability as well as possible clinical response . " We are excited to begin our clinical development of this new appr oac h of a ltering the tumor microenvironment with intratumoral CMP -‐ 001," said Dr. Krieg. " We believe this treatment should convert "cold" tumors , which lack immune activation and are not likely to respond to checkpoint inhibitors , in to immunologically "hot" tumors which are much more likely to respond to checkpoint inhibition . This has the potential to induce a powerful anti -‐ tumor CD8 + T cell immune response resulting in significantly increased response rates to checkpoint inhibitor therapy in multiple cancer indications ." About CMP -‐ 001 CMP -‐ 001 comprises a CpG -‐ A oligonucleotide packaged within a virus -‐ like particle . It is designed to activate the innate immune system via Toll -‐ like receptor 9 (TLR9) and mediate tumor control by the subsequent induction of both innate and adaptive anti -‐ tumor immune responses . CMP -‐ 001 is the only CpG -‐ A oligonucleotide in clinical development . It differs from the other major classes of TLR9 agonists in development , CpG -‐ B, and CpG -‐ C , by it s induction of much higher levels of type I interferons, without inducing immune suppressive IL -‐ 10. In addition, the virus -‐ like particle nature of CMP -‐ 001 will promote formation of immune complexes within tumors, providing an additional mechanism driving anti -‐ tumor i mmunity. In preclinical models , CMP -‐ 001 shows single agent activity in controlling growth of both local and distant tumors, with increased anti -‐ tumor ac tivity seen in combination with systemic anti -‐ PD -‐ 1 therapy. CMP -‐ 001 was licensed from Kuros Biosciences AG and was formerly known as CYT003. It has previously demonstrated a good safety profile and evidence of immune activity in over 700 patients who participated in clinical trials for non -‐ oncology indications.
About Checkmate
Checkmate Pharmaceuticals is a clinical stage company pursuing a novel approach to specifically activating the innate arm of the immune system to recognize and ultimately destroy tumor cells. The company is leveraging its expertise and the vast body of knowledge in the field of CpG oligonucleotides and is validating a n approach that will combine the ability of CpG DNA to activate an anti -‐ tumor T cell response with checkpoint inhibition to overcome a tumor’s ability to mute the immune response .
Checkmate’s founder and CEO, Dr. Art Krieg, discovered immune stimulatory CpG DNA in 1994 . S ince then , CpG containing DNA therapies have been administered to thousands of patients showing potent immune activation and a n acceptable safety profile. Checkmate is a privately held company headquartered in Cambridge, M A , whose Series A investors include Sofinnova Ventures and venBio

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Celldex Therapeutics Presents Data Supporting the Clinical Development of Glembatumumab Vedotin and the Preclinical CD40 Program at the AACR Annual Meeting 2016

On April 20, 2016 Celldex Therapeutics, Inc. (NASDAQ:CLDX) reported three poster presentations at the American Association for Cancer Research (AACR) (Free AACR Whitepaper) Annual Meeting 2016 in New Orleans (Press release, Celldex Therapeutics, APR 20, 2016, View Source [SID:1234511138]). The Company previously reported on four poster presentations at AACR (Free AACR Whitepaper), which included Phase 1 safety and immune response data from the ongoing study evaluating varlilumab and nivolumab in patients with advanced cancers. New presentations included data enhancing the understanding of glembatumumab vedotin’s mechanism of action and further validation of the overexpression of its target, gpNMB, in a wide range of tumor types. Additionally, the Company also presented research with lead agonist antibodies targeting the CD40 receptor, a promising target for immunotherapy, in a poster titled "Development and characterization of novel CD40 antibody agonists for cancer immunotherapy."

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Found on antigen presenting cells, such as dendritic cells, macrophages and B cells, CD40 is a key activator of immune responses. The Company has characterized two fully human antibodies that demonstrated potent agonist activity, such as activating human dendritic cells and B cells and indirectly inducing T cell proliferation. Importantly, Fc receptor interaction, which could cause signal amplification and is required for some CD40 agonist antibodies in development, was not required for agonist ability, enabling controlled, sensitive activation of CD40. Additionally, the drug candidates were shown to upregulate CD95/Fas, a receptor involved in apoptosis, on B cell lymphoma cell lines and to mediate potent anti-tumor activity against the lymphomas in vivo.

"The CD40 pathway has a unique and powerful role in bridging the innate and adaptive immune response, and if properly modulated, it could become a very important part of cancer immunotherapy. We have identified some promising and differentiated antibodies, from which we will select a lead clinical candidate to complement our growing immunotherapy pipeline," said Tibor Keler, Ph.D., Executive Vice President and Chief Scientific Officer of Celldex Therapeutics. "In addition, we are enthusiastic about new research demonstrating gpNMB overexpression in a broad set of tumor types, further reinforcing the wide potential clinical applicability of glembatumumab vedotin."

The CD40 poster is available on the "Publications" page of the "Science" section of the Celldex website.

Celldex and its collaborating investigators also presented two additional posters supporting the clinical development of glembatumumab vedotin:

Title: Glycoprotein NMB (gpNMB) overexpression is prevalent in human cancers: pancreatic cancer, non-small cell lung cancer, head and neck cancer, and osteosarcoma

gpNMB is the target of Celldex’s antibody-drug conjugate glembatumumab vedotin. Using a validated immunohistochemistry (IHC) assay to detect the expression of gpNMB, the Company examined tissues from multiple types of solid tumors and normal tissue. Overexpression of gpNMB in samples of tumor tissue versus normal tissue was found in squamous cell carcinoma of the lung (85%), osteosarcoma (62%), pancreatic cancer (55%), lung adenocarcinoma (45%) and squamous cell carcinoma of the head and neck (40%). These results support the potential broad applicability of gpNMB as a therapeutic target across a wide range of tumor types. Celldex is currently investigating glembatumumab vedotin in the pivotal METRIC study in triple-negative breast cancer and in a Phase 2 study in metastatic melanoma. Independent investigators are also studying glembatumumab vedotin in uveal melanoma and osteosarcoma. A Phase 1/2 study in squamous cell carcinoma of the lung is expected to commence in the second quarter of 2016.

The poster is available on the "Publications" page of the "Science" section of the Celldex website.

Title: Targeting gpNMB with 89Zr-CR011 for PET imaging of triple negative breast cancer
Abstract: 4209

Collaborating investigators used a radio-labeled form of the glembatumumab antibody to study uptake by tumor cells in vitro and in vivo. Using positron emission tomography (PET) imaging with xenograft models of triple-negative breast cancer (TNBC), the investigators detected specific localization of glembatumumab in the tumor and plan to perform similar studies with patient derived tumor samples. These studies contribute to understanding the mechanisms of action for glembatumumab vedotin, Celldex’s antibody-drug conjugate targeting gpNMB, and may provide a diagnostic approach for selecting patients with the greatest likelihood of clinical benefit.

About Glembatumumab Vedotin
Glembatumumab vedotin is a fully-human monoclonal antibody-drug conjugate (ADC) that targets glycoprotein NMB (gpNMB). gpNMB is a protein overexpressed by multiple tumor types, including breast cancer, melanoma, lung cancer, uveal melanoma and osteosarcoma. gpNMB has been shown to be associated with the ability of the cancer cell to invade and metastasize and to correlate with reduced time to progression and survival in breast cancer. The gpNMB-targeting antibody, CR011, is linked to a potent cytotoxic, monomethyl auristatin E (MMAE), using Seattle Genetics’ proprietary technology. Glembatumumab vedotin is designed to be stable in the bloodstream but to release MMAE upon internalization into gpNMB-expressing tumor cells, resulting in a targeted cell-killing effect. Glembatumumab vedotin is in development for the treatment of locally advanced or metastatic breast cancer with an initial focus in triple negative disease, stage III and IV melanoma, uveal melanoma and osteosarcoma.

The Molecular Registry of Pituitary Adenomas (REMAH): A bet of Spanish Endocrinology for the future of individualized medicine and translational research.

Pituitary adenomas are uncommon, difficult to diagnose tumors whose heterogeneity and low incidence complicate large-scale studies. The Molecular Registry of Pituitary Adenomas (REMAH) was promoted by the Andalusian Society of Endocrinology and Nutrition (SAEN) in 2008 as a cooperative clinical-basic multicenter strategy aimed at improving diagnosis and treatment of pituitary adenomas by combining clinical, pathological, and molecular information. In 2010, the Spanish Society of Endocrinology and Nutrition (SEEN) extended this project to national level and established 6 nodes with common protocols and methods for sample and clinical data collection, molecular analysis, and data recording in a common registry (www.remahnacional.com). The registry combines clinical data with molecular phenotyping of the resected pituitary adenoma using quantitative real-time PCR of expression of 26 genes: Pituitary hormones (GH-PRL-LH-FSH-PRL-ACTH-CGA), receptors (somatostatin, dopamine, GHRH, GnRH, CRH, arginine-vasopressin, ghrelin), other markers (Ki67, PTTG1), and control genes. Until 2015, molecular information has been collected from 704 adenomas, out of 1179 patients registered. This strategy allows for comparative and relational analysis between the molecular profile of the different types of adenoma and the clinical phenotype of patients, which may provide a better understanding of the condition and potentially help in treatment selection. The REMAH is therefore a unique multicenter, interdisciplinary network founded on a shared database that provides a far-reaching translational approach for management of pituitary adenomas, and paves the way for the conduct of combined clinical-basic innovative studies on large patient samples.
Copyright © 2016 SEEN. Published by Elsevier España, S.L.U. All rights reserved.

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Complementary dynamic BH3 profiles predict co-operativity between the multi-kinase inhibitor TG02 and the BH3 mimetic ABT-199 in acute myeloid leukaemia cells.

Direct co-operation between sensitiser molecules BAD and NOXA in mediating apoptosis suggests that therapeutic agents which sensitise to BAD may complement agents which sensitise to NOXA. Dynamic BH3 profiling is a novel methodology that we have applied to the measurement of complementarity between sensitiser BH3 peptide mimetics and therapeutic agents. Using dynamic BH3 profiling, we show that the agent TG02, which downregulates MCL-1, sensitises to the BCL-2-inhibitory BAD-BH3 peptide, whereas the BCL-2 antagonist ABT-199 sensitises to MCL-1 inhibitory NOXA-BH3 peptide in acute myeloid leukaemia (AML) cells. At the concentrations used, the peptides did not trigger mitochondrial outer membrane permeabilisation in their own right, but primed cells to release Cytochrome C in the presence of an appropriate trigger of a complementary pathway. In KG-1a cells TG02 and ABT-199 synergised to induce apoptosis. In heterogeneous AML patient samples we noted a range of sensitivities to the two agents. Although some individual samples markedly favoured one agent or the other, in the group as a whole the combination of TG02 + ABT-199 was significantly more cytotoxic than either agent individually. We conclude that dynamic NOXA and BAD BH3 profiling is a sensitive methodology for investigating molecular pathways of drug action and complementary mechanisms of chemoresponsiveness.

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Kuros receives milestone payment from Checkmate

On April 20, 2016 Kuros Biosciences Ltd. ("Kuros" or the "Company"), reported that Checkmate Pharmaceuticals Inc., Cambridge, MA, USA ("Checkmate") has dosed its first first melanoma patient in a Phase 1b clinical trial with CMP-001, formerly known as CYT003 (Press release, Kuros Biosciences, APR 20, 2016, View Source [SID1234516801]). The trial is designed as a multi-center, open-label study of CMP-001 in combination with pembrolizumab for patients with advanced melanoma who have either progressed on anti-PD1 therapy or have failed to respond to at least 12 weeks of therapy.

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In August 2015, Checkmate acquired exclusive access to Cytos’ clinically validated product candidate CYT003 as well as its VLP platform and to technology related to oligonucleotide synthesis for multiple products in the field of oncology. As a result of the first dosing of a patient with this licensed product candidate, Kuros will receive a milestone payment of USD 1 million from Checkmate. In this collaboration Kuros may receive up to USD 90 million in development milestones and may receive up to double-digit royalties on net sales from successfully developed products.

Didier Cowling, Chief Executive Officer of Kuros, commented: "We are very pleased that Checkmate has already advanced CMP-001 into a phase 1b clinical trial. Reaching this milestone only 10 months after signing the license agreement is a significant achievement. We wish to congratulate Checkmate on its progress and are eager to see how intra-tumoral therapy with CPM-001 will perform in combination with pembrolizumab in patients with advanced melanoma. "

For further information, please contact:

Kuros Biosciences Ltd

Harry Welten, MBA

Chief Financial Officer

Tel: +41 44 733 46 46

[email protected]