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Aduro Biotech Announces Upcoming Data Presentations at the 2017 American Association for Cancer Research Annual Meeting

On March 6, 2017 Aduro Biotech, Inc. (Nasdaq:ADRO), a biopharmaceutical company with three distinct immunotherapy technologies, reported data presentations relating to its technology platforms to be given at the 2017 American Association for Cancer Research (AACR) (Free AACR Whitepaper) Annual Meeting taking place in Washington, D.C., April 1 through April 5, 2017 (Press release, Aduro Biotech, MAR 6, 2017, View Source [SID1234518003]).

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Abstract 2645: Development of a first in class APRIL fully blocking antibody BION-1301 for the treatment of multiple myeloma

Date/Time: Monday, April 3, 1:00 p.m. to 5:00 p.m. ET
Location: Convention Center, Halls A-C
Poster section 26; Board number 4

Abstract 2993: STING signaling in breast tumor microenvironment modulates immune checkpoint blockade efficacy in the neu-N mouse model of breast cancer

Date/Time: Monday, April 3, 3:05 p.m. to 3:20 p.m. ET
Location: Room 152, Level 1, Washington Convention Center
Session: Innate Immune Mechanisms in Cancer Treatment – Oral Presentation

Late-Breaking Research: Immunology

Abstract LB-198:

Combination of PEGylated recombinant hyaluronidase PH20 (PEGPH20) with live-attenuated, double-deleted (LADD) Listeria enhances tumor infiltrating CD8+ T cell response and antitumor efficacy in mice

Date/Time: Tuesday, April 4, 8:00 a.m. to 12:00 p.m. ET
Location: Convention Center, Halls A-C
Poster section 35; Board number 21

TG Therapeutics Announces Positive Topline Data from Phase 3 GENUINE Study of TG-1101 in Combination with Ibrutinib in Patients with High Risk Chronic Lymphocytic Leukemia (CLL)

On March 6, 2017 TG Therapeutics (NASDAQ:TGTX) reported positive topline results from its Phase 3 GENUINE clinical trial of TG-1101 (ublituximab) plus ibrutinib in patients with previously treated high risk Chronic Lymphocytic Leukemia (CLL) (Press release, TG Therapeutics, MAR 6, 2017, View Source [SID1234518002]). For the study, high risk was defined as having any one or more of the following: 17p deletion, 11q deletion or p53 mutation.

The multicenter, randomized trial (NCT02301156), which assessed the efficacy and safety of TG-1101 plus ibrutinib, met its primary endpoint, demonstrating a statistically significant improvement in Overall Response Rate (ORR) compared to ibrutinib alone in both the Intent to Treat (ITT) population (p=0.001) and Treated population (p < 0.001). The ITT population includes all 126 randomized patients (64 in the TG-1101 + ibrutinib arm and 62 in the ibrutinib alone arm) while the Treated population includes all ITT patients that received at least one dose of either study drug (59 in the TG-1101 + ibrutinib arm and 58 in the ibrutinib alone arm).

Overall Response Rates

TG-1101 plus Ibrutinib Ibrutinib P-value
Treated Population (n) n=59 n=58
Overall Response Rate 80 % 47 % P < 0.001
All responses were assessed by independent blinded central review using the iwCLL 2008 guidelines. Per iwCLL guidelines, responders require confirmation of response for a minimum duration of 2 months. As of the date of the analysis, each arm had responders that were awaiting confirmation visits which are scheduled to occur over the next two months. During the study it was infrequent (less than 3% in the combination arm) for initial responses to fail to be confirmed. Median follow-up for the study was approximately 12 months.

The GENUINE study was designed to demonstrate the value of adding TG-1101, a highly potent next generation glycoengineered anti-CD20 monoclonal antibody to ibrutinib monotherapy in high risk CLL, and was powered to show a statistically significant improvement in ORR, with a minimal absolute detectable difference between the two arms of approximately 20%. The absolute difference between the arms was approximately 30% resulting in a p-value of ≤ 0.001. Results from registration directed studies included in the ibrutinib prescribing information demonstrate single agent ibrutinib response rates ranging from 43% to 58% in patients with previously treated CLL, with the findings from the GENUINE study of 47% ORR for ibrutinib fitting well within historical experience.

In addition to ORR, observed advantages were seen for the combination in a number of secondary and other efficacy measures, including radiographic Complete Response (CR) rate, Progression Free Survival and Time to Response. Sufficient data on MRD negative status and bone marrow confirmation of radiographic CRs were not available at the time of analysis. From a safety standpoint, the combination was well tolerated with a safety profile consistent with the Phase 2 study of ublituximab plus ibrutinib recently published in the British Journal of Haematology.

A full analysis of the Phase 3 GENUINE data along with detailed efficacy and safety results will be submitted for presentation at a medical meeting in the first half of 2017 and the Company plans to meet with the FDA as soon as possible thereafter to discuss the filing of the data for accelerated approval.

"TG-1101 is a highly potent next generation glycoengineered anti-CD20 monoclonal antibody. We believe the data today demonstrate that the addition of TG-1101 to ibrutinib enhances the therapeutic benefit of ibrutinib in patients with previously treated high risk CLL, the patient population with the poorest outcome on ibrutinib. We believe the results observed in the combination arm are extremely compelling and the regimen has the potential to become the standard of care for treating patients with high risk CLL that have progressed from other therapies," said Michael S. Weiss, Executive Chairman and Chief Executive Officer of TG Therapeutics. Mr. Weiss continued, "We believe that using combination therapy to accelerate and deepen response in poor prognosis high risk CLL is critically important for patient outcomes and we look forward to sharing these data with the FDA in the coming months to discuss filing for accelerated approval. Most importantly, we would like to thank the investigators and their patients for participating in this significant research."

Dr. Jeffrey Sharman, the GENUINE Phase 3 Study Chair and the Medical Director for Hematology Research for the US Oncology Network, commenting on the results stated, "Ibrutinib has been a great addition to our CLL armamentarium, however we have long believed that ibrutinib alone may not be enough, particularly for patients with high-risk disease. This study demonstrates that the addition of ublituximab, can significantly enhance the response rates without compromising safety. We believe that the rapid responses seen in our Phase 2 study with ublituximab plus ibrutinib are validated here in our Phase 3 GENUINE study and are important markers of improved overall efficacy and patient outcomes. I look forward to the presentation of the results at an upcoming medical meeting."

ABOUT THE PHASE 3 GENUINE STUDY

The Phase 3 GENUINE study is a randomized, open label, multicenter clinical trial to evaluate the safety and efficacy of TG-1101 (ublituximab) plus ibrutinib compared to ibrutinib alone in adult patients with high risk Chronic Lymphocytic Leukemia (CLL) who received at least one prior therapy for their disease.

The study was conducted at 160 clinical trial sites in the US and Israel and randomized 126 patients. Patients received ibrutinib orally at 420 mg once daily in both arms and in the treatment arm those patients also received intravenous infusions of TG-1101 at 900 mg dosed on days 1, 8 and 15 of cycle 1 and day 1 of cycles 2-6. Patients in the treatment arm who had not progressed received quarterly infusions of TG-1101 maintenance at 900 mg.

Exelixis’ Cabozantinib Granted Orphan Drug Designation for the Treatment of Hepatocellular Carcinoma

On March 6, 2017 Exelixis, Inc. (Nasdaq: EXEL) reported that the U.S. Food & Drug Administration (FDA) has granted orphan drug designation to cabozantinib for the treatment of hepatocellular carcinoma (HCC) (Press release, Exelixis, MAR 6, 2017, View Source [SID1234518001]). This information was posted to FDA’s website on March 4, 2017 and can be accessed at

View Source

A pivotal phase 3 trial (CELESTIAL) of cabozantinib is ongoing in patients with advanced HCC, and Exelixis has guided that data from the trial are expected in 2017.

Orphan drug status is granted to treatments for diseases that affect fewer than 200,000 people in the U.S. and provides certain incentives for medications intended for the treatment, diagnosis or prevention of rare diseases. At present, these incentives include seven years of marketing exclusivity for the orphan indication, certain federal grants, tax credits and waiver of certain FDA fees.

About the CELESTIAL Trial

CELESTIAL is designed to enroll 760 patients with advanced HCC who received prior sorafenib. Patients are randomized 2:1 to receive 60 mg of cabozantinib daily or placebo. The primary endpoint for the trial is overall survival, and secondary endpoints include objective response rate and progression-free survival. Exploratory endpoints include patient-reported outcomes, biomarkers and safety. The CELESTIAL trial is being conducted at more than 100 sites globally in 19 countries.

Dynavax Presents Promising Clinical Data from Lead Immuno-Oncology Candidate, SD-101, at the International Congress on Targeted Anticancer Therapies

On March 6, 2017 Dynavax Technologies Corporation (NASDAQ: DVAX) reported the presentation of findings in patients with metastatic melanoma in the dose escalation phase of an ongoing Phase 1b/2 study investigating SD-101, Dynavax’s intratumoral TLR9 agonist, in combination with KEYTRUDA (pembrolizumab), an anti-PD-1 therapy developed by Merck, known as MSD outside the United States and Canada (Press release, Dynavax Technologies, MAR 6, 2017, View Source [SID1234518000]). Results evaluating 17 patients for efficacy and 22 patients for safety were reported. In patients naïve to anti-PD-1 treatment, responses were observed in six out of seven patients, for an Overall Response Rate (ORR) of 86%. This includes two (29%) complete responses (CR) and four (57%) partial responses (PR). Target tumor shrinkage was observed in all 7 evaluable patients. In 10 patients with progressive disease who initiated KEYTRUDA anti-PD-1 monotherapy prior to enrollment, one PR was observed and five patients had stable disease (SD) while receiving KEYTRUDA and SD-101, with four of the 10 patients experiencing target tumor shrinkage. These data are being presented by Robert Janssen, M.D., chief medical officer for Dynavax, in an oral presentation at the International Congress on Targeted Anticancer Therapies which begins today in Paris, France.

"We are pleased with the response in the anti-PD-1 naïve group with 2 complete responses and tumor shrinkage in all 7 evaluable patients," said Dr. Janssen. "In addition, we are encouraged to have seen a partial response at the highest dose in the anti-PD-1 refractory group with little toxicity. This allows us to explore higher doses of SD-101 in anti-PD-1 refractory patients in the expansion phase to further develop the best path forward for this hard to treat population."

SD-101 in combination with KEYTRUDA generally was well-tolerated. No dose-limiting toxicities of the combination were observed in any dose cohort, and a maximum tolerated dose (MTD) was not identified. The most common treatment-emergent adverse events were injection site reactions and transient grade 1 to 2 flu-like symptoms, including fever, chills and myalgia that respond to over the counter medications such as acetaminophen. The study also includes biomarker assessments, suggesting that treatment with SD-101 and KEYTRUDA resulted in elevation of gene signatures consistent with an increase in Th1 immune cell types as well as an increase in immune cell infiltrates such as CD8+ T-cells in the tumor microenvironment.

About MEL-01 (KEYNOTE-184)
The dose-escalation and expansion study of SD-101 in combination with KEYTRUDA includes patients with histologically or cytologically confirmed unresectable Stage IIIc/IV melanoma. The primary endpoints of the trial are MTD and evaluation of the safety of intratumoral SD-101 in combination with KEYTRUDA. In addition, the trial is investigating response as assessed by the investigator according to RECIST v1.1, biomarker assessments and duration of response. Patients previously treated with anti-PD-1 and other immunotherapies are included.

About SD-101
SD-101 is Dynavax’s proprietary, second-generation, Toll-like receptor 9 (TLR9) agonist CpG-C class oligodeoxynucleotide. SD-101 is being studied for its multiple anti-tumor activities in innate immune cells and activation of plasmacytoid dendritic cells to stimulate T cells specific for antigens released from dying tumor cells. TLR9 agonists such as SD-101 enhance T and B cell responses and provide potent Type 1 interferon induction and maturation of plasmacytoid dendritic cells to antigen-presenting cells. SD-101 is being evaluated in several Phase 1/2 oncology studies to assess its safety and activity.

For information about SD-101 trials that are currently recruiting patients, please visit www.clinicaltrials.gov.

ImmunoCellular Therapeutics Provides Update on ICT-107 Phase 3 Glioblastoma Trial and Announces Advances in Stem-to-T-Cell Research Program

On March 6, 2017 ImmunoCellular Therapeutics, Ltd. ("ImmunoCellular") (NYSE MKT:IMUC) reported an update on the Company’s ICT-107 phase 3 registration trial in newly diagnosed glioblastoma, and announced advances in its Stem-to-T-cell Research program (Press release, ImmunoCellular Therapeutics, MAR 6, 2017, View Source [SID1234517998]).

O
ICT-107 Phase 3 Trial in Newly Diagnosed Glioblastoma Update

As previously disclosed, ImmunoCellular submitted an amendment of the ICT-107 phase 3 protocol to the US FDA. The key change in this amendment will enable patients to be randomized 30 days after commencing screening procedures, accelerating the time to randomization by approximately 2 months.

"We are pleased to announce that the amendment is currently being implemented at US clinical sites and that amended protocol submissions are underway in Europe and Canada," said Anthony Gringeri, PhD, ImmunoCellular President and Chief Executive Officer. "As anticipated, as a result of the protocol change, the Special Protocol Assessment (SPA) which was based on the original protocol, is no longer applicable. We will engage in further discussions with the FDA concerning the SPA in the future. The change in the status of the SPA will not materially impact the execution of the phase 3 trial, and data generated from this phase 3 study can still be used as primary evidence to support a marketing application."

Advances in the Stem-to-T-Cell Research Program

ImmunoCellular reported successful completion of the first milestone for the Company’s Stem-to-T-cell program, the sequencing of a selected T cell receptor (TCR) gene. When inserted into a blood stem cell, this TCR gene is expected to enhance patients’ immune systems to produce killer T cells programmed to attack tumors. This Stem-to-T-cell therapeutic strategy has the potential to provide a safer, sustainable and more specific immune treatment for cancer.

"We are excited that our Stem-to-T-cell program is advancing well and look forward to working with our collaborators at The University of Texas MD Anderson Cancer Center to develop antigen-specific killer T cells. This approach potentially represents a major advance in cancer immunotherapy and may overcome the challenge of short-lived T cell responses seen with the present forms of T cell and CAR-T therapies," said Steven J. Swanson, PhD, ImmunoCellular’s Senior Vice President, Research.

Achieving this milestone required completion of several critical steps: the collection and analysis of multiple clones of cells containing the target TCR genes, harvesting the plasmids with the TCR gene, and then sequencing that gene. Next, ImmunoCellular Therapeutics will initiate development of the gene therapy component. This phase entails loading the TCR gene sequence into a viral vector (such as a lentivirus) for delivery into the patient’s hematopoietic stem cells which could become, in essence, an internal factory producing antigen-specific killer T cells. Once these fundamental elements are in place, a product candidate for testing in cell lines and suitable preclinical models may be generated. Successful testing would potentially lead to human clinical trials.

In November 2015, ImmunoCellular entered into a sponsored research agreement with MD Anderson, with Dr. Cassian Yee as principal investigator, which focused on identifying T cells that find and kill tumor cells expressing a target antigen. The ultimate goal of this work is to establish a clinical program based on hematopoietic stem cells that are isolated from the patient, modified with the TCR gene sequence, and then returned to the patient. These modified stem cells would continually produce antigen-specific killer T cells that target and kill the tumor.

ImmunoCellular plans to provide a more detailed update on the ICT-107 phase 3 trial and the Stem-to-T-cell program when it reports fourth quarter and full year 2016 financial results in March.

About ImmunoCellular’s Stem-to-T-Cell Program

ImmunoCellular’s Stem-to-T-cell program seeks to create antigen-specific cytotoxic or "killer" T cells that attack tumors in patients. Autologous hematopoietic stem cells (HSCs) are collected from cancer patients and transfected using a T cell receptor sequence that recognizes the patient’s tumor. After transfection, the HSCs would be administered to the patient. These transfected HSCs, now containing the T cell receptor gene, would migrate to the patient’s bone marrow and re-establish residence. In addition to replicating transformed HSCs, these cells would begin producing cytotoxic T cells specifically targeting the patient’s tumor. These cytotoxic T cells would migrate to the tumor location and begin the process of tumor destruction. This renewable population of killer T cells provides ongoing surveillance to prevent disease recurrence.

ImmunoCellular’s collaboration with the University of Maryland, established in January 2016, is designed to enhance the Company’s dendritic cell (DC) and stem cell technology platforms. It is comprised of three projects currently underway. In the first project, collaborators have screened and identified FDA approved small molecule drugs that behave effectively like checkpoint inhibitors, and potentially preventing cancer cells from evading the immune system. These small molecules appear to down-regulate important tumor features, such as the PD-1 ligand on the surface of the tumor cells, and also up-regulate the display of tumor specific antigens. If successfully developed, they could be used in combination with ImmunoCellular’s DC or Stem-to-T-cell therapies, augmenting their ability to recognize and kill tumors cells.

A second project represents new ways to engineer T cells for combination with DC immunotherapy by amplifying T cell properties directed toward tumor antigens. A third project focuses on modifying antigens for enhanced DC immunotherapy, including novel peptide configurations for use in DC-based products to induce enhanced T cell responses.