Synlogic Progresses Clinical and Preclinical Pipeline and Outlines 2019 Catalysts

On January 3, 2019 Synlogic, Inc. (Nasdaq: SYBX), a clinical-stage drug discovery and development company applying synthetic biology to beneficial microbes to develop novel living medicines, reported an overview of recent progress and outlined key objectives and anticipated milestones for 2019 (Press release, Synlogic, JAN 3, 2019, View Source [SID1234532396]).

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"2018 was a significant year for Synlogic as we advanced our two lead clinical programs and platform. We have demonstrated proof of mechanism in both programs in healthy volunteers and are currently evaluating safety and activity in patients with disease. In addition, we broadened our pipeline with the addition of our first immuno-oncology development candidate, SYNB1891," said Aoife Brennan, M.B. Ch.B., Synlogic’s president and chief executive officer. "In 2019 we look forward to presenting data from our two ongoing clinical programs that will inform the development of our Synthetic Biotic platform. With the recent expansion of our internal GMP-manufacturing capabilities, we are well positioned to maintain the momentum of the past year and continue to advance programs through clinical development as expeditiously as possible."

2019 Goals and Catalysts

Pipeline

SYNB1020: An orally delivered, first-in-class, Synthetic Biotic medicine designed for treatment of elevated blood ammonia levels (hyperammonemia) in chronic liver disease or genetic urea cycle disorders (UCDs).
In mid-2019, Synlogic expects to present top-line data from its randomized, double-blind, placebo -controlled Phase 1b/2a clinical trial evaluating SYNB1020 in patients with cirrhosis and elevated ammonia. The main endpoints of the study are safety and tolerability, as well as evidence of ammonia lowering in patients.
SYNB1618: An orally delivered, Synthetic Biotic medicine designed for the treatment of phenylketonuria (PKU).
In mid-2019, Synlogic expects to present top-line data from its randomized, double-blind, placebo-controlled Phase 1/2a clinical trial evaluating SYNB1618 in patients with PKU. The study is designed to evaluate safety and tolerability in this population as well as pharmacokinetics and pharmacodynamics as determined by the production of biomarkers specifically associated with SYNB1618 activity.
SYNB1891: Synlogic’s first immuno-oncology (IO) development candidate, a STING agonist-producing Synthetic Biotic medicine, designed to act as a dual innate immune activator, for the treatment of non-immunologically responsive solid tumors.
In the second half of 2019 the Company expects to file an IND application to enable advancement of SYNB1891 into a Phase 1 clinical study.
Pre-clinical data and early pipeline programs:
The company expects to publish and present data at major scientific and medical meetings throughout the year demonstrating the breadth and potential of its Synthetic Biotic platform.
Synlogic and AbbVie will continue to advance their ongoing collaboration to develop a Synthetic Biotic medicine for the treatment of inflammatory bowel disease (IBD).
Corporate

Synlogic ended the third quarter of 2018 with $133 million in cash and cash equivalents and expects that this will fund Company operations through 2020 under its current plan.
The Company will continue to explore additional strategic opportunities to expand the reach of its Synthetic Biotic platform.
2018 Accomplishments and Highlights:

Pipeline

SYNB1020:
Dosed first patient in Phase 1b/2a trial of SYNB1020 for the treatment of hyperammonemia in patients with cirrhosis and elevated ammonia. The clinical trial is a single and multiple dose-escalation, randomized, double-blind, placebo-controlled study of orally administered SYNB1020 in patients with cirrhosis and elevated blood ammonia, designed to evaluate safety, tolerability, kinetics, and pharmacodynamics as well as the ability of SYNB1020 to lower blood ammonia. Synlogic enrolled and treated an initial open-label sentinel cohort of six subjects with mild disease to ensure that SYNB1020 was safe in patients with liver disease who often have compromised barrier function and might be susceptible to infection. This part of the study is complete and Synlogic is enrolling patients with more advanced disease with elevated blood ammonia at baseline.
Presented data supporting continued development of SYNB1020 for the treatment of liver disease at the annual meeting of the American Association for the Study of Liver Diseases (AASLD). Synlogic presented data from a cross-sectional study designed to establish ammonia measurement parameters and ammonia levels in healthy volunteers at clinical sites that are participating in Synlogic’s ongoing Phase 1b/2a clinical trial of SYNB1020 in patients with cirrhosis and elevated ammonia. Preclinical data from a rat model were also presented by Synlogic’s collaborators that demonstrated dose-dependent lowering of blood ammonia by Synthetic Biotic strains designed to consume ammonia, confirming earlier preclinical observations in mouse models of liver disease.
SYNB1618:
Announced positive interim data from the healthy volunteer arm of its ongoing Phase 1/2a clinical trial evaluating SYNB1618 for the treatment of PKU. The data demonstrated a statistically significant, dose-dependent effect on treatment-associated biomarkers, indicating proof-of-mechanism, and also established a go-forward dose for the treatment arm in patients with PKU.
Published preclinical data in Nature Biotechnology identifying key biomarkers of SYNB1618 activity in healthy animal and disease models. The data demonstrated that oral administration of SYNB1618 significantly reduced blood phenylalanine (Phe) levels, the key metabolite associated with PKU, in mouse models of PKU and resulted in dose-dependent pharmacodynamics in healthy non-human primates (NHPs).
Fast Track designation granted to SYNB1618 for PKU by the U.S. Food and Drug Administration (FDA).
SYNB1891:
Presented preclinical data highlighting the potential of Synthetic Biotic medicines in IO and announced first IO clinical candidate at the annual meeting of the Society for Immunotherapy of Cancer (SITC) (Free SITC Whitepaper). A webcast of the presentation is available on the Synlogic website. Data presented at the meeting demonstrate the platform’s potential for the treatment of cancer and inflammation and specifically highlight the unique advantages of Synlogic’s approach to stimulate the innate immune system.
Corporate

Successfully completed two public offerings of common stock in January and April, resulting in approximately $83 million in total net proceeds.
The Company announced executive leadership changes including the appointment of Aoife Brennan, M.B., B.Ch., as president and chief executive officer, and the appointment of Antoine Awad as Head of Technical Operations.
Synlogic expanded its manufacturing capabilities to enable production of clinical trial material for its oral and immuno-oncology programs via entry into an agreement to lease GMP clean-room space from the Azzur Group, LLC. The agreement provides the Company with infrastructure that enables advancement of clinical programs through early and mid-phase studies and supports the production of both solid and oral formulations.
Advanced collaboration with AbbVie to develop Synthetic Biotic-based treatments for IBD resulting in payment to Synlogic of a $2.0 million milestone.
Synlogic was added to both the Russell 3000Index and the NASDAQ Biotechnology Index (Nasdaq: NBI).

Puma Biotechnology to Present at J. P. Morgan Healthcare Conference

On January 3, 2019 Puma Biotechnology, Inc. (NASDAQ: PBYI), a biopharmaceutical company, reported that Alan H. Auerbach, Chairman, Chief Executive Officer, President and Founder of Puma, will provide an overview of the Company at 12:00 Noon PST on Wednesday, January 9, at the 37th Annual J. P. Morgan Healthcare Conference (Press release, Puma Biotechnology, JAN 3, 2019, View Source [SID1234532394]). The conference will be held at the Westin St. Francis Hotel in San Francisco.

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A live webcast of the presentation will be available on the Company’s website at www.pumabiotechnology.com . The presentation will be archived on the website and available for 30 days

Kura Oncology to Present at J.P. Morgan Healthcare Conference

On January 3, 2019 Kura Oncology, Inc. (Nasdaq: KURA), a clinical-stage biopharmaceutical company focused on the development of precision medicines for oncology, reported its participation at the 37th Annual J.P. Morgan Healthcare Conference (Press release, Kura Oncology, JAN 3, 2019, View Source [SID1234532393]). Troy Wilson, Ph.D., J.D., President and Chief Executive Officer, is scheduled to present an overview of the company on Thursday, January 10, 2019 at 9:30 a.m. PT / 12:30 p.m. ET, followed by a Q&A session at 10:00 a.m. PT / 1:00 p.m. ET. The conference will be held from January 7-10, 2019 in San Francisco.

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Live audio webcasts of the presentation and Q&A session will be available in the Investors section of Kura’s website at www.kuraoncology.com, with an archived replay available for 30 days following the event.

Lilly to Participate in J.P. Morgan Healthcare Conference

On January 3, 2019 Eli Lilly and Company (NYSE: LLY) reported that it will participate in the 37th Annual J.P. Morgan Healthcare Conference on Tuesday, January 8, 2019 (Press release, Eli Lilly, JAN 3, 2019, View Source [SID1234532392]). David A. Ricks, Lilly’s chairman and chief executive officer, will participate in a fireside chat from 6:00 p.m. to 6:25 p.m. Eastern time.

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A live audio webcast will be available on the "Webcasts & Presentations" section of Lilly’s Investor website at View Source A replay of the presentation will be available on this same website for approximately 90 days.

Atara Biotherapeutics Exclusively Licenses Mesothelin-Targeted CAR T Immunotherapy for Solid Tumors

On January 3, 2019 Atara Biotherapeutics, Inc. (Nasdaq: ATRA), a leading off-the-shelf, allogeneic T-cell immunotherapy company developing novel treatments for patients with cancer, autoimmune and viral diseases, reported that it has exclusively licensed worldwide rights to a mesothelin-targeted chimeric antigen receptor T-cell (CAR T) immunotherapy for solid tumors from Memorial Sloan Kettering Cancer Center (MSK) (Press release, Atara Biotherapeutics, JAN 3, 2019, View Source [SID1234532388]). The most advanced program in Atara’s CAR T collaboration with MSK will focus on development of a next-generation, mesothelin-targeted CAR T using novel 1XX CAR signaling domain and PD-1 dominant negative receptor (DNR) checkpoint inhibition technologies for patients with mesothelin-associated solid tumors.

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"We are excited by the promising initial clinical results of the mesothelin-directed CAR T approach and believe mesothelin, an antigen well recognized as associated with aggressive solid tumors, is a promising target for developing a next-generation CAR T incorporating our PD-1 DNR technology," said Prasad S. Adusumilli, M.D., FACS, Deputy Chief of Thoracic Service, Director of Mesothelioma Program and Head of Solid Tumors Cell Therapy at the Cellular Therapeutics Center at MSK.

PD-1 DNRs are modified PD-1 receptors that lack inhibitory function and are designed to enhance CAR T efficacy in solid tumors without the need for development of a CAR T in combination with a PD-1 checkpoint inhibitor. Animal models have demonstrated that CAR T immunotherapies with a PD-1 DNR result in enhanced activity against solid tumors1.

"We look forward to collaborating with Atara to develop a next-generation mesothelin-targeted CAR T immunotherapy," said Michel Sadelain, M.D., Ph.D., Director, Center for Cell Engineering, and Head, Gene Expression and Gene Transfer Laboratory at MSK. "Our novel mesothelin 1XX CAR is designed to extend functional CAR T cell persistence by sustaining T cell effector functions without precipitating exhaustion, provides a complementary technology to tackle challenging tumor microenvironments."

Mesothelin is a solid tumor-associated antigen that is expressed at high levels on the surface of cells in aggressive solid tumors including mesothelioma, triple-negative breast cancer, esophageal cancer, pancreatic cancer and non-small cell lung cancer. Initial results from an ongoing MSK investigator-sponsored Phase 1 study (NCT02414269) of a mesothelin-targeted CAR T immunotherapy for patients with malignant pleural cancers were presented at the 2018 American Society of Gene and Cell Therapy (ASGCT) (Free ASGCT Whitepaper) Annual Meeting and support activity and safety in patients with advanced mesothelioma2,3. This ongoing Phase 1 dose-escalation study continues to accrue patients and enhanced response rates were observed when patients were subsequently treated with pembrolizumab, a PD‑1 checkpoint inhibitor. MSK is also investigating mesothelin-targeted CAR T cells for patients with advanced breast and lung cancer (NCT02792114). Additional results from these ongoing studies are expected to be presented at upcoming scientific congresses.

"Our CAR T strategy includes collaboration with investigators on cutting-edge technologies to advance programs with near-term clinical potential," said Dietmar Berger, M.D., Ph.D., Global Head of Research and Development of Atara Biotherapeutics. "Based on the encouraging MSK Phase 1 clinical experience, we are progressing a next‑generation, mesothelin‑targeted CAR T that leverages MSK technologies designed to further enhance responses in patients with mesothelioma and other advanced solid tumors. We are also developing three additional next-generation and off-the-shelf, allogeneic CAR T immunotherapies in oncology for patients with acute myelogenous leukemia (AML) and B-cell malignancies, leveraging Atara’s world-class T cell manufacturing capabilities and research expertise."

In the MSK investigator-sponsored Phase 1 study presented at the 2018 ASGCT (Free ASGCT Whitepaper) Annual Meeting, patients with malignant pleural cancers were administered a mesothelin-targeted autologous CAR T immunotherapy regionally into the chest cavity following cyclophosphamide pre-conditioning (NCT02414269). Of the six patients treated with CAR T cells following preconditioning cyclophosphamide who subsequently received checkpoint inhibitors, one showed a complete metabolic response (CMR), two had a partial response (PR) and one exhibited stable disease (SD). Mesothelin-targeted CAR T immunotherapy and PD-1 checkpoint inhibition was well-tolerated with no adverse events greater than Grade 2 and no on-target, off-tumor toxicity.

Financial terms of the agreement were not disclosed.

References
1Cherkassky L, et al. Human CAR T cells with cell-intrinsic PD-1 checkpoint blockade resist tumor-mediated inhibition. J Clin Invest. 2016 Aug 1;126(8):3130-44. doi: 10.1172/JCI83092. Epub 2016 Jul 25.
2Adusumilli PS, et al. A phase I clinical trial of malignant pleural disease treated with regionally delivered autologous mesothelin-targeted CART cells: safety and efficacy – a preliminary report. Abstract 342; 2018 ASGCT (Free ASGCT Whitepaper) Annual Meeting; Chicago, IL; May 16-19, 2018.
3Adusumilli PS, et al. Regional delivery of mesothelin-targeted CAR T cell therapy generates potent and long-lasting CD4-dependent tumor immunity. Sci Transl Med. 2014 Nov 5;6(261):261ra151. doi: 10.1126/scitranslmed.3010162.