AIM ImmunoTech Provides Third Quarter 2020 Business Update

On November 13, 2020 AIM ImmunoTech Inc. (NYSE American: AIM), an immuno-pharma company focused on the research and development of therapeutics to treat immune disorders, viral diseases and multiple types of cancers, reported that provided a business update for the third quarter ended September 30, 2020 (Press release, AIM ImmunoTech, NOV 13, 2020, View Source [SID1234570941]).

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Third Quarter 2020 Financial Highlights:

As of September 30, 2020, AIM had cash, cash equivalents and marketable securities of $54.5 million, as compared to $8.8 million as of December 31, 2019.
Research and development expenses for the three months ended September 30, 2020 were $1.10 million, compared to $1.19 million for the three months ended September 30, 2019.
General and administrative expenses for the three months ended September 30, 2020 were $2.09 million, compared to $1.85 million for the three months ended September 30, 2019.
The Company’s complete financial results are available in the Company’s September 30, 2020 Form 10-Q filed with the Securities and Exchange Commission on November 12, 2020, which is available at www.sec.gov and on the Company’s website.

Recent Clinical and Business Highlights

AIM has announced several significant clinical, research and business milestones since the start of the third quarter of 2020.

Immuno-oncology

On September 22, AIM announced receipt of statistically significant positive pancreatic cancer survival results from a multi-year Early Access Program conducted at Erasmus University Medical Center in the Netherlands. Prof. Casper van Eijck, MD Ph.D., and his team at Erasmus MC found a statistically significantly positive survival benefit when using AIM’s drug Ampligen in patients with locally advanced/metastatic pancreatic cancer after systemic chemotherapy. Median survival was approximately two-fold higher, that is 200%, in the Ampligen arm as compared to the historical controls. A detailed clinical report and an article for publication are being prepared by the Erasmus MC team. AIM intends to facilitate a follow-up pancreatic cancer Phase 2/3 clinical trial based on these data.

Myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) and COVID-19

On November 2, AIM announced the publication of statistically significant ME/CFS findings providing further support for the considerable positive impact Ampligen may have on people living with ME/CFS when administered in the early stages of the disease. The data were published in PLOS ONE. AIM researchers found, in a reanalysis of data from the earlier Phase 3 study, that the TLR3 agonist Ampligen substantially improved physical performance in a subset of early-onset ME/CFS patients. The findings potentially carry special importance for survivors of COVID-19, many of whom report classic chronic fatigue-like symptoms after recovering from the acute SARS-CoV-2 infection. These patients – who are commonly referred to as "Long Haulers" because of the persistence of these symptoms – are uniquely situated to potentially benefit from Ampligen as an early onset therapy. As part of its plan to study this potential benefit, on October 6, AIM announced the receipt of Institutional Review Board approval for the expansion of the AMP-511 Expanded Access Program clinical trial for ME/CFS to include patients previously diagnosed with SARS-CoV-2.

COVID-19

On August 27, AIM announced the identification of an effective in vitro model in which Ampligen was shown to be able to decrease SARS-CoV-2 infectious viral yields by 90% at clinically achievable intranasal dosage levels. This demonstration of Ampligen’s bioactivity against SARS-CoV-2 supports the company’s commitment to the development of Ampligen as both a prophylaxis and early onset intranasal therapy for COVID-19. To that end, on September 16, AIM announced that recruitment had begun in Roswell Park Comprehensive Cancer Center’s Phase 1/2a COVID-19 clinical study of the effectiveness of Ampligen in combination with interferon alpha-2b in treating cancer patients with mild or moderate COVID-19 infection. This followed the Clinical Trial Agreement between AIM and Roswell Park announced on July 9. Less than a week earlier, on July 6, AIM also announced its entry into a trilateral Material Transfer and Research Agreement with Japan’s National Institute of Infectious Diseases and Shionogi & Co., Ltd. to test Ampligen as a potential vaccine adjuvant for COVID-19. Under the agreement, AIM will provide Ampligen samples for various research projects.

Moleculin Biotech, Inc. Reports Financial Results for the Quarter Ended September 30, 2020

On November 13, 2020 Moleculin Biotech, Inc., (Nasdaq: MBRX) (Moleculin or the Company), a clinical stage pharmaceutical company with a broad portfolio of drug candidates targeting highly resistant tumors and viruses, reported its financial results for the quarter ended September 30, 2020 and provided a business update (Press release, Moleculin, NOV 13, 2020, View Source [SID1234570940]).

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Management Discussion

"We are extremely encouraged by the progress we made in the third quarter. Despite the sustained headwinds from the COVID-19 pandemic, we were able to drive the development of Annamycin both in our AML and lung indications, further progress our clinical trials for WP1066, expand and accelerate our infectious disease platform, and bolster our experienced leadership team," commented Walter Klemp, Chairman and CEO of Moleculin.

"We were particularly encouraged by the progress we made advancing our lead candidate Annamycin, a ‘next generation anthracycline’ demonstrating little to no cardiotoxicity. In June, we conducted our End of Phase 1 meeting with the US Food and Drug Administration ("FDA"). As a result of this meeting, we will expand our protocol-mandated testing for cardiotoxicity throughout the remainder of the Phase 1 trial. This will provide additional safety data, including investigating the continued evidence of little to no cardiotoxicity, and efficacy data which both US and European regulators may consider as we prepare to transition to a Phase 2 clinical trial. We also received approval from Polish authorities to increase the dose-escalation from 30 mg/m2 per cohort to 60 mg/m2 per cohort which will accelerate finding the maximum tolerated dose."

"We were also excited by the promise Annamycin shows in targeting lung localized tumors. Currently there is an extreme unmet need for a more effective treatment of sarcomas that have metastasized to the lungs, and limited treatment options available for lung metastases resulting from a primary tumor, even though the primary tumor may have been treatable. In September, we were pleased to announce results from an independent laboratory demonstrating in animal studies the ability of Annamycin to generate a 30-fold greater concentration in lungs compared to the current standard of care drug, enabling the targeting of this cancer in its sanctuary site. These results further validate data we presented at the American Association of Cancer Research, which illustrated Annamycin’s uniquely high uptake and retention in the lungs, resulting in consistently high in vivo activity against a wide range of lung-localized tumors in mice. Due to Annamycin’s strong pre-clinical data in this indication, we successfully completed a pre-IND (Investigational New Drug) meeting with the FDA and discussed our development plan for Annamycin, including the clinical study design and dosing strategy for an initial Phase 1b/2 protocol for soft tissue sarcomas with lung metastases. Based on our conversations, and the compelling pre-clinical data, we are optimistic that we will be able to file an IND with the FDA for this indication before the end of the year."

"In addition to driving the development of Annamycin, we continued to advance WP1066, the lead molecule in Moleculin’s portfolio of immune stimulators and modulators of transcription. Importantly, we were able to report positive data from both our adult and pediatric Phase 1 clinical trials. In our adult Phase 1 clinical trial being conducted at a major cancer center in Houston, we reported positive preliminary data in adult patients with glioblastoma ("GBM"), which supports the progression of the trial to the fourth and final dose escalation cohort. In our Phase 1 clinical trial of WP1066 for the treatment of brain tumors in children being at conducted at the Aflac Cancer & Blood Disorders Center at Children’s Healthcare of Atlanta, the first three patients in the trial received treatment at a dose level of 4 mg/kg with no adverse events related to WP1066 and the study is now proceeding to the next higher dose of 6 mg/kg. Importantly, one patient with diffuse intrinsic pontine glioma ("DIPG"), showed an apparent response to the treatment with both clinical improvement and radiologic reduction of tumor size. We believe this to be particularly notable given the clinical trial history of DIPG, as approximately 200 clinical trials have been conducted with no drug showing significant activity in this disease."

"Although we remain laser focused on advancing our clinical pipeline, we are very encouraged by the potential our infectious disease pipeline continues to offer. Our initial preclinical focus for the WP1122 program was to help provide a treatment for the growing COVID-19 pandemic. Following strong preclinical data and independent research demonstrating WP1122’s unique mechanism of action and in-vitro activity, we were pleased to further progress our studies as we prepare for submission of an IND to test WP1122 in COVID-19 patients. During the quarter, we also discovered that two other molecules within our portfolio of antimetabolites displayed significant in vitro antiviral activity against SARS-CoV-2 and other hard to treat viruses. Independent laboratory testing of our new drug candidates, called WP1096 and WP1097, not only showed significant antiviral activity against SARS-CoV-2, but also showed greater potential against HIV, Zika, and Dengue Fever. While we are encouraged by the strong preclinical data, we believe our best course of action for advancing this portfolio given its early stage will be through relying on collaborations and externally funded pathways. Subsequently, we entered into an agreement with the University of Campinas in São Paulo, Brazil to further enable collaboration into research on the anti-viral capabilities of WP1122, specifically for the coronavirus. We continue to be optimistic about the data demonstrated in the WP1122 portfolio and are planning to file an IND application or its equivalent for either cancer-related or virus-related clinical trials in the first half of 2021."

Mr. Klemp concluded, "As we head into the final months of 2020, we believe we remain well-positioned to progress our three core technologies. To help drive this effort, we recently appointed Liz Cermak to our Board of Directors. Liz brings nearly four decades of healthcare experience, has helped oversee drugs through commercialization, and has licensed drugs to well respected big pharmaceutical companies. With our experienced leadership team, and the progress we made throughout the third quarter, we look forward to building on our momentum, and executing on our strategic plan as we head into 2021."

Recent Milestones and Accomplishments:

Next Generation Anthracycline – Annamycin

Announced results from an independent laboratory demonstrating the ability of Annamycin to target lung localized tumors, validating previous internal animal studies
Successfully completed a pre-IND (Investigational New Drug) meeting with the FDA regarding the development plan for Annamycin, including the clinical study design and dosing strategy for the initial phase 1b/2 protocol for soft tissue sarcomas with lung metastases
Announced positive preclinical data corroborating the efficacy of Annamycin in lung metastases at AACR (Free AACR Whitepaper)
Received approval to accelerate European clinical trial in AML, URPL doubled dose escalation. Currently in process with Polish regulatory authorities to open two additional clinical sites for the Phase 1/2 clinical study
Announced positive independent report confirming absence of cardiotoxicity in Annamycin (unlike currently approved anthracyclines)
Successfully completed Phase 1 portion of the AML Phase 1/2 trial in the US with positive results
Immune/Transcription Modulators – WP1066 Portfolio

Announced preliminary data from the Phase 1 clinical trial of WP1066, in patients with glioblastoma (GBM). Data supports the progression of trial to the fourth and final dose escalation cohort
Reported positive interim results in Emory University pediatric brain tumor Phase 1 clinical trial. One patient with diffuse intrinsic pontine glioma (DIPG) showed an apparent response to the treatment with both clinical improvement and radiologic reduction of tumor size
Reported preclinical data demonstrating that WP1066 used in combination with traditional whole brain radiation therapy (WBRT) resulted in long-term survivors and enhanced median survival time relative to monotherapy in mice with implanted human brain tumors
Patent protection filed by our licensor covering combination of immune stimulating/transcriptional modulator, including combination with radiation therapy
Received Orphan Drug Designation from FDA
Infectious Disease and Metabolism/Glycosylation Inhibitors- WP1122, WP1096 and WP1097 Portfolio

Entered into an agreement with the University of Campinas in São Paulo, Brazil to further research the anti-viral capabilities of WP1122, specifically for the coronavirus
Announced in vitro results demonstrating the significant antiviral activity of WP1096 and WP1097, in a range of infectious diseases including against: SARS-CoV-2, HIV, Zika and Dengue Fever
Independent research conducted at the University of Campinas in São Paulo, Brazil demonstrated that SARS-CoV-2 infection is supported by elevated glucose levels and that inhibition of glycolysis with 2-DG effectively eliminated viral load in vitro
Corroborated antiviral activity of WP1122 against coronavirus in pre-clinical testing at IIT Research Institute in another virus host cell line
Agreement with Sterling Pharma USA LLC for U.S. production of WP1122 to support expanded development efforts
Two rounds of preclinical assessment of the potential for WP1122 to address COVID-19 at ImQuest BioSciences demonstrated that WP1122 has an antiviral effect on HCoV-229E. The virus yield reduction assay demonstrated a 5 to 10-fold inhibition of coronavirus production by WP1122 when compared to untreated virus control.
University of Frankfurt found 2-DG to reduce replication of SARS-CoV-2, the virus that causes COVID-19, by 100% in in vitro testing
Patent filed by our licensor covering WP1122 as anti-viral drug candidate
Corporate Strategy and Events

Appointed Elizabeth (Liz) Cermak, an accomplished life sciences board director with deep pharmaceutical business development expertise, to Board of Directors
Participated in a panel at ROTH Capital’s, "COVID-19 Therapeutics in Development," healthcare event
Presented virtually at the H.C. Wainwright & Co. 22nd Annual Global Investment Conference, the Oppenheimer Fall Healthcare Life Sciences & MedTech Summit and the LD Micro 500 Virtual Investor Conference in September
Presented at the Life Sciences Investor Forum in June
In November replaced our prior purchase agreement with Lincoln Park Capital with a new $22 million purchase agreement, including an initial investment of $2 million, with enhanced capabilities to draw upon
Anticipated 2020 Milestones

IND submission for Annamycin for the treatment of tumor metastases to the lung
Expanding infectious disease portfolio via preclinical testing of WP1122 in preparation for submitting an IND for a COVID-19 clinical trial in the first half of 2021
Continued clinical testing in adult and pediatric brain tumors with WP1066 via physician sponsored trials
Financial Results for the Quarter Ended September 30, 2020

Research and development (R&D) expense was $4.4 million and $2.8 million for the three months ended September 30, 2020 and 2019, respectively. The increase of $1.6 million is mainly related to increased clinical trial activity, increased license fees and costs related to sponsored research agreements, costs related to manufacturing of additional drug product and two additional employees in R&D headcount.

General and administrative expense was $1.7 million for the three months ended September 30, 2020 and 2019, respectively.

Loss from operations for the third quarter was $6.2 million compared to a net loss of $4.5 million for the third quarter of 2019. This increase was largely due to the above-mentioned increase in R&D.

Net loss for the third quarter of 2020 was $3.4 million, compared to a net loss of $4.1 million in the third quarter of 2019, and was attributed to the above-mentioned increase in R&D and the change in fair value on revaluation of warrant liability associated with warrants issued in conjunction with stock offerings. Changes in our stock price can result in a material gain or loss during the quarter related to the revaluation of our warrant liability. The gain from the change in the fair value of the warrant liability for the third quarter of 2020 was $2.7 million compared to a gain of $0.1 million in the same quarter in 2019. This is a non-cash item.

Liquidity and Capital Resources

As of September 30, 2020, we had cash and cash equivalents of $12.8 million and prepaid expenses and other of $2.5 million. We also had $1.3 million of accounts payable and $2.1 million of accrued expenses. A significant portion of the accounts payable and accrued expenses are due to work performed in relation to our clinical trials. For the nine months ended September 30, 2020 and 2019, we used approximately $14.6 million and $12.5 million of cash in operating activities, respectively, which represents cash outlays for research and development and general and administrative expenses in such periods. For the nine months ended September 30, 2020 and 2019, net proceeds from financing activities were $17.1 million and $20.9 million, respectively, predominately from the sale of our common stock and the exercise of warrants. Cash used in investing activities for the nine months ended September 30, 2020 and 2019 was approximately $0.4 million and $0.04 million, respectively.

We believe that our existing cash and cash equivalents as of September 30, 2020 plus the $2.6 million cash raised and committed subsequent to the quarter will be sufficient to fund our planned operations into the third quarter of 2021, without the issuance of additional equity for cash. Any such issuances should extend the funding of our planned operations beyond the third quarter of 2021. Such plans are subject to our stock price, market conditions, changes in planned expenses depending on clinical enrollment progress, the use of drug product or a combination thereof.

Checkmate Pharmaceuticals Reports Third Quarter 2020 Financial Results and Provides an Update on Recent Progress

On November 13, 2020 Checkmate Pharmaceuticals, Inc. (NASDAQ: CMPI) ("Checkmate"), a clinical stage biotechnology company focused on developing its proprietary technology to harness the power of the immune system to combat cancer, reported third quarter 2020 financial results and provided an update on recent progress (Press release, Checkmate Pharmaceuticals, NOV 13, 2020, View Source [SID1234570939]).

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"We are enthusiastic as we advance CMP-001 toward registration in melanoma and expand toward potential proof of concept in additional indications," said Barry Labinger, Chief Executive Officer. "We remain on track to initiate key new clinical trials by late 2020/early 2021 as planned."

Recent Progress

During SITC (Free SITC Whitepaper)’s 35th Anniversary Annual Meeting, three new data presentations were given evaluating CMP-001, Checkmate’s advanced generation Toll-like receptor 9 (TLR9) agonist. These data continue to demonstrate the clinical activity of CMP-001 in combination with anti-PD-1 antibodies in patients with melanoma.
Checkmate is actively engaging with potential clinical sites and remains on track to initiate three Phase 2 trials combining CMP-001 with PD-1 blockade by late 2020/early 2021 for the treatment of:
First-line head and neck cancer
Anti-PD-1 refractory melanoma
First-line metastatic or unresectable melanoma
Third Quarter 2020 Financial Results

Cash and cash equivalents: Cash and cash equivalents were $137.3 million as of September 30, 2020.
Research and development expenses (R&D): R&D expenses were $6.7 million for the quarter ended September 30, 2020, compared to $5.1 million for the quarter ended September 30, 2019. The increase was primarily attributable to increased headcount and clinical trial expenses in connection with increased patient enrollment in the ongoing clinical trials of CMP-001 and preparations for the initiation of planned additional clinical trials of CMP-001. These increases were partially offset by a decrease in contract manufacturing costs.
General and administration expenses (G&A): G&A expenses were $3.2 million for the quarter ended September 30, 2020, compared to $1.2 million for the quarter ended September 30, 2019. The increase was primarily attributable to increases in personnel and other operating expenses incurred in connection with Checkmate beginning to operate as a publicly-traded company.
Net loss and comprehensive loss: Net loss and comprehensive loss was $9.8 million for the quarter ended September 30, 2020, compared to $6.2 million for the quarter ended September 30, 2019.

BIO-PATH HOLDINGS REPORTS THIRD QUARTER 2020 FINANCIAL RESULTS

On November 13, 2020 Bio-Path Holdings, Inc., (NASDAQ:BPTH), a biotechnology company leveraging its proprietary DNAbilize liposomal delivery and antisense technology to develop a portfolio of targeted nucleic acid cancer drugs, reported its financial results for the third quarter ended September 30, 2020 and provided an update on recent corporate developments (Press release, Bio-Path Holdings, NOV 13, 2020, View Source [SID1234570935]).

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"We made meaningful progress across our programs throughout the third quarter despite continued headwinds related to the COVID-19 pandemic. Importantly, enrollment continues in Stage 2 of our Phase 2 trial of prexigebersen (BP1001), a liposomal Grb2 antisense, as a combination treatment for patients suffering with acute myeloid leukemia (AML)," said Peter Nielsen, President and Chief Executive Officer of Bio-Path Holdings. "We further strengthened our intellectual property portfolio with a strategic patent providing broad protection for application of prexigebersen in the treatment of a variety of cancers in combination with front-line therapies."

"We remain on track to initiate a Phase 1 study of prexigebersen for the treatment of solid tumors by year end. This is a particularly important advancement for Bio-Path as it marks our first-in-human study in solid tumors, an area of significant need where current treatment options are often ineffective," continued Mr. Nielsen.

Recent Corporate Highlights

Received Notice of Allowance for Strategic Patent for Prexigebersen in Combination with Front-Line Therapies. In October, Bio-Path announced that the United States Patent and Trademark Office had issued a notice of allowance for claims related to the Company’s lead product candidate, prexigebersen, in combination with either a cytidine analogue, such as decitabine, or the Bcr-Abl tyrosine kinase inhibitors dasatinib and nilotinib. The patent provides broad protection for application of prexigebersen in the treatment of a variety of cancers in combination with front-line therapies.

Announced First Patient Dosed in Amended Stage 2 of the Phase 2 Clinical Trial Evaluating Prexigebersen in Acute Myeloid Leukemia. In August, Bio-Path announced the enrollment and dosing of the first patient in the amended Stage 2 of the Phase 2 clinical study of prexigebersen for the treatment of AML in combination with front-line therapy decitabine and venetoclax.
Financial Results for the Third Quarter Ended September 30, 2020

The Company reported a net loss of $3.0 million, or $0.80 per share, for the three months ended September 30, 2020, compared to a net loss of $2.2 million, or $0.78 per share, for the three months ended September 30, 2019.

Research and development expenses for the three months ended September 30, 2020 increased to $2.0 million, compared to $1.4 million for the three months ended September 30, 2019 primarily due to increased enrollment for our Phase 2 clinical trial of prexigebersen in AML, as well as increased preclinical study expenses.

General and administrative expenses for the three months ended September 30, 2020 increased to $1.0 million, compared to $0.9 million for the three months ended September 30, 2019 primarily due to increased franchise tax expense.

As of September 30, 2020, the Company had cash of $12.1 million, compared to $20.4 million at December 31, 2019. Net cash used in operating activities for the nine months ended September 30, 2020 was $8.4 million compared to $6.1 million for the comparable period in 2019. Subsequent to September 30, 2020, Bio-Path issued 850,000 shares of its common stock for gross proceeds of approximately $4.6 million through its at-the-market offering agreement with H.C. Wainwright.
Conference Call and Webcast Information

Bio-Path Holdings will host a conference call and webcast today at 8:30 a.m. ET to review these third quarter 2020 financial results and to provide a general update on the Company. To access the conference call please dial (844) 815-4963 (domestic) or (210) 229-8838 (international) and refer to the conference ID 5878804. A live audio webcast of the call and the archived webcast will be available in the Media section of the Company’s website at www.biopathholdings.com.

Surface Oncology Announces SRF617 and SRF388 Will Advance to Combination and Expansion Stages of Ongoing Phase 1 Clinical Trials

On November 13, 2020 Surface Oncology (Nasdaq: SURF), a clinical-stage immuno-oncology company developing next-generation immunotherapies that target the tumor microenvironment, reported that both of its lead clinical programs, SRF617 (targeting CD39) and SRF388 (targeting IL-27), have achieved predefined criteria for advancement into combination and expansion stages of the ongoing Phase 1 trials (Press release, Surface Oncology, NOV 13, 2020, View Source [SID1234570934]). These criteria include safety, successful escalation to a biologically relevant dose, target engagement and meaningful pharmacodynamic activity in the ongoing Phase 1 trials.

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"As we initiated the Phase 1 clinical trials just eight months ago, we are extremely pleased with the progress both of our lead product programs have made to date," said Jeff Goater, chief executive officer. "With the updates announced today, both SRF617 and SRF388 are well-positioned to advance into the key next stages of the ongoing trials in the coming months and ultimately deliver meaningful clinical benefits to patients suffering with cancer."

"We are very encouraged by these data and our clinical progress to date with SRF617 and SRF388," said Rob Ross, M.D., chief medical officer. "Both of these programs are highly innovative, next-generation immunotherapies with the potential to provide novel treatment options to patients with cancer. We look forward to advancing each of these programs into the next stage of the ongoing Phase 1 studies and presenting detailed clinical updates at a medical conference in the first half of 2021."

SRF617 Highlights:

The open label, Phase 1/1b clinical trial of SRF617 was initiated in March 2020 and is enrolling patients with a variety of advanced solid tumors. Summary results from nine patients treated across three dose levels (20 mg, 70 mg and 200 mg intravenously every two weeks) include:
No dose limiting toxicities have been observed and SRF617 has been well-tolerated.
Target occupancy on B cells has increased in a dose-dependent manner, and importantly, within the 200 mg cohort, the goal of meaningful, sustained target occupancy has been achieved. Surface Oncology has already demonstrated that target occupancy is directly correlated with CD39 enzymatic inhibition.
Prolonged stable disease (>5 months) has been seen in one patient with NSCLC who had progressed on prior anti-PD-1 treatment.
While dose escalation will continue because of the lack of dose-limiting toxicities, SRF617 has achieved a dose that supports advancement of the program into the planned combination expansion cohorts (additional details provided below). We anticipate that the combination cohorts will likely begin enrolling in late 2020.
Surface Oncology plans to present detailed initial clinical results from the ongoing Phase 1/1b trial of SRF617 at a medical conference in the first half of 2021.
In May 2020, Surface Oncology announced a clinical collaboration with Merck (NYSE: MRK) to evaluate the safety and efficacy of combining SRF617 with Merck’s KEYTRUDA (pembrolizumab), the first anti-PD-1 therapy approved in the United States. This combination will be studied as a future component of the ongoing first-in-human Phase 1/1b study of SRF617 and will be evaluated in patients with solid tumors, with a focus on patients with gastric cancer and those who have developed resistance to checkpoint inhibition — both areas of high unmet need.
In addition, as part of the clinical development plan, Surface Oncology will initiate SRF617 combinations with gemcitabine and abraxane in patients with pancreatic cancer and SRF617 in combination with AB928, an A2A/A2B small molecule inhibitor, in clinical collaboration with Arcus Biosciences (NYSE: RCUS) in patients with prostate cancer.
SRF388 Highlights:

The open label, Phase 1 clinical trial of the first-in-class antibody SRF388 was initiated in April 2020 and is enrolling patients with a variety of advanced solid tumors. Summary results from nine patients treated across five dose levels (0.003, 0.03, 0.1, 0.3 and 1 mg/kg intravenously every four weeks) include:
No dose limiting toxicities have been observed and SRF388 has been well tolerated.
While dose escalation will continue because of the lack of dose-limiting toxicities, SRF388 has already achieved maximal inhibition of the IL-27 signaling pathway at the 0.3mg/kg dose, as measured in whole blood from patients treated on the trial. Planned monotherapy Phase 2 expansion cohorts in liver cancer and kidney cancer are on track to begin enrolling patients in the first half of 2021.
Prolonged stable disease (>6 months) has been noted in one patient with kidney cancer, who had progressed on prior anti-PD-1 treatment. Notably, kidney cancer is one of the predefined indications of interest for SRF388 based on clear demonstration of pathway activation in clinical samples. No patients with liver cancer have been enrolled in the dose escalation portion of the trial to date.
Surface Oncology plans to present detailed initial clinical results from the ongoing Phase 1 trial of SRF388 at a medical conference in the first half of 2021.
The clinical development plan for SRF388 is based on compelling translational research that indicates that IL-27 is upregulated and functional in both kidney cancer and liver cancer. This work is supported in part by a study presented at the 2020 American Association for Cancer Research (AACR) (Free AACR Whitepaper) Annual Meeting demonstrating that high levels of IL-27 correlate strongly with the risk of developing liver cancer. The presentation can be found here.
SRF388 recently received Orphan Drug designation and Fast Track designation for the treatment of hepatocellular carcinoma from the FDA.
About SRF617:

SRF617 is a fully human antibody designed to inhibit the enzymatic activity of CD39, allowing for a dual mechanism of action to promote anti-tumor immunity via reduction of immunosuppressive adenosine in addition to increasing levels of immunostimulatory ATP. A substantial body of research supports a role for CD39 in allowing cancer to evade immune responses. For example, in gastric cancer, immune cells within the tumor often express high levels of CD39, which may impair an overall anti-cancer immune response even in the presence of an anti-PD-1 antibody. In preclinical studies, SRF617 has exhibited strong affinity for and inhibition of CD39, the ability to reduce adenosine and increase ATP levels and anti-tumor activity both as a single agent and in combination with multiple therapeutic agents.

About SRF388:

SRF388 is a fully human anti-IL-27 antibody designed to inhibit the activity of this immunosuppressive cytokine. Surface Oncology has identified particular tumor types, including liver and kidney cancer, where IL-27 appears to play an important role in the immunosuppressive tumor microenvironment and may contribute to resistance to treatment with checkpoint inhibitors. SRF388 targets the rate-limiting p28 subunit of IL-27, and preclinical studies have shown that treatment with SRF388 blocks the immuno-suppressive biologic effects of IL-27, resulting in immune cell activation in combination with other cancer therapies and potent anti-tumor effects as a monotherapy. Furthermore, Surface Oncology has identified a potential biomarker associated with IL-27 that may be useful in helping identify patients most likely to respond to SRF388.