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Magenta Therapeutics Announces IND Clearance for MGTA-117 Targeted Conditioning Clinical Trial

On September 15, 2021 Magenta Therapeutics, Inc. (Nasdaq: MGTA), a clinical-stage biotechnology company developing novel medicines to bring the curative power of stem cell transplant to more patients, reported that its Investigational New Drug (IND) application for MGTA-117 is active with the U.S. Food and Drug Administration (FDA) (Press release, Magenta Therapeutics, SEP 15, 2021, View Source [SID1234587726]). The company expects to open the Phase 1/2 clinical trial in Q4 2021 to evaluate its MGTA-117 antibody-drug conjugate (ADC) targeted conditioning program.

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"We are very pleased that our collaboration with the FDA has resulted in the clearance of the MGTA-117 IND. We have addressed the FDA’s request for a bioassay to be incorporated into the clinical trial protocol," said Jason Gardner, D.Phil., President and Chief Executive Officer, Magenta Therapeutics. "Improving conditioning treatments is essential for broadening patient accessibility to the curative potential of stem cell transplant and gene therapies. We have designed MGTA-117 specifically to replace toxic radiation and chemotherapy-based conditioning agents used in current medical practice. This program holds significant potential for patients across several disease areas."

The multi-center, open label Phase 1/2 clinical trial with single-dose escalating cohorts will evaluate the safety, tolerability, pharmacokinetics (PK) and pharmacodynamics (PD) of MGTA-117 as a single agent in relapsed/refractory AML and MDS patients. Magenta will continue to engage with the FDA to transition the trial to the intended primary target population of hematopoietic stem cell transplant-eligible AML and MDS patients. In addition, Magenta has planned gene therapy clinical trial collaborations with AVROBIO and Beam Therapeutics to evaluate the potential utility of MGTA-117 for conditioning gene therapy patients without the use of non-selective busulfan or other toxic chemotherapies.

About MGTA-117

Magenta’s MGTA-117 program is the company’s lead targeted conditioning product candidate, an antibody-drug conjugate (ADC) designed to selectively deplete hematopoietic stem cells (HSCs) from patients prior to transplant or HSC-based gene therapy to reduce the need for high-dose or high-intensity chemotherapeutic agents or, in the case of gene therapy applications, to potentially eliminate the need for chemotherapeutic agents altogether. MGTA-117 targets the CD117 receptor, which is highly expressed on the cell surface of HSCs and leukemia cells, making it a promising target for conditioning across broad sets of diseases, including certain blood cancers, hemoglobinopathies (sickle cell disease and beta thalassemia) and inherited metabolic disorders.

Cerus Corporation to Present at the 2021 Cantor Global Virtual Healthcare Conference

On September 15, 2021 Cerus Corporation (Nasdaq: CERS) reported that William ‘Obi’ Greenman, Cerus’ president and chief executive officer, and Kevin D. Green, Cerus’ chief financial officer, are scheduled to participate in the 2021 Cantor Global Virtual Healthcare Conference on Wednesday, September 29, 2021 at 11:20 a.m. ET (Press release, Cerus, SEP 15, 2021, View Source [SID1234587725]).

A live webcast of the presentation will be available on Cerus’ Investor Relations page at View Source A replay of the webcast will be available for approximately two weeks following the completion of the event.

HOOKIPA announces clinical collaboration with Merck & Co., Inc., Kenilworth, NJ., USA to evaluate HB-200 in combination with KEYTRUDA® (pembrolizumab) in patients with advanced head and neck cancers

On September 15, 2021 HOOKIPA Pharma Inc. (NASDAQ: HOOK, ‘HOOKIPA’), a company developing a new class of immunotherapeutics based on its proprietary arenavirus platform, reported it has entered into a clinical collaboration and supply agreement with Merck & Co., Inc., Kenilworth, NJ., USA (known as MSD outside of the United States and Canada) to evaluate the combination of HB-200, a novel arenaviral immunotherapeutic, and Merck & Co., Inc., Kenilworth, NJ., USA’s anti-PD-1 therapy, KEYTRUDA (pembrolizumab) as first-line treatment for patients with advanced head and neck squamous cell carcinoma (HNSCC) (Press release, Hookipa Biotech, SEP 15, 2021, View Source [SID1234587724]).

"Our collaboration with Merck & Co., Inc., Kenilworth, NJ., USA, a proven immuno-oncology leader, is an important step as we advance our HB-200 program for the treatment of Human Papillomavirus 16-positive (HPV16+) cancers and seek to introduce a new class of immunotherapeutics," said Joern Aldag, Chief Executive Officer at HOOKIPA. "There remains considerable unmet treatment need for people with metastatic head and neck cancers, and we believe the combination of HB-200 and KEYTRUDA may offer hope. We have seen encouraging early responses in heavily pre-treated patients with the addition of KEYTRUDA in our ongoing HB-200 trial. We are excited to explore the potential benefit of HB-200 as a first-line treatment in combination with KEYTRUDA, a leading anti-PD-1 inhibitor globally, and the possibility of making a meaningful impact on patients’ lives."

The collaboration has been initiated based on promising data from the ongoing HB-200 Phase 1/2 clinical trial (NCT04180215) in advanced HPV16+ cancers. As reported at the 2021 American Society of Clinical Oncology (ASCO) (Free ASCO Whitepaper) Annual Meeting, 15 patients with metastatic head and neck cancers were eligible for the efficacy analysis, as of data cut-off. HB-201 monotherapy showed an 18 percent overall response rate and median progression-free survival of 3.45 months in heavily pretreated head and neck cancer patients, better than current 2nd-line treatment. In addition, preliminary data on HB-201/HB-202 therapy showed a disease control rate of 100 percent (4/4 patients). Importantly, the Phase 1 data on 38 evaluable patients showed that HB-200 therapy has a favorable safety profile in heavily pre-treated patients with HPV16+ cancers, underlining its potential as a monotherapy and in possible combination with checkpoint inhibitors.

With a HB-200 program data read-out anticipated by Q4 2021, HOOKIPA anticipates initiating a Phase 2 trial with HB-200 in combination with KEYTRUDA in 2022. Additional Phase 2 expansion cohorts are also planned to start in Q1 2022.

KEYTRUDA is a registered trademark of Merck Sharp & Dohme Corp., a subsidiary of Merck & Co., Inc., Kenilworth, NJ, USA.

About HB-200
HB-201 and HB-202 are HOOKIPA’s lead oncology candidates engineered with the company’s proprietary replicating arenaviral vector platform. Each single-vector compound uses a different arenavirus backbone (Lymphocytic choriomeningitis virus for HB-201 and Pichinde virus for HB-202), while expressing the same antigen, an E7E6 fusion protein derived from HPV16. In pre-clinical studies, alternating administration of HB-201 and HB-202 resulted in a ten-fold increase in immune response and better disease control than either compound alone. HB-201 is being tested clinically as a single vector therapy and also in an alternating vector combination with HB-202.

About Human Papillomavirus
Human Papillomavirus, or HPV, is estimated to cause about 5 percent of the worldwide burden of cancers. This includes approximately 99 percent of cases in cervical, up to 60 percent of head and neck, 70 percent of vaginal and 88 percent of anal cancers.

The majority of these cancers are caused by the HPV serotype 16. Most infections with HPV are cleared from the body with no lasting consequences. However, in some cases, HPV DNA becomes integrated into chromosomal DNA. When host cells take up this DNA, they express the HPV E6 and E7 proteins. This uptake can potentially lead to cancer since expression of these proteins leads to alterations in cell cycle control, which in turn predisposes these cells to become cancerous.

Press Release: Francis Medical Announces Close of $55 Million Series B Equity Financing

On September 15, 2021 Francis Medical, Inc., a privately-held medical device company developing an innovative and proprietary water vapor ablation therapy for the treatment of prostate, kidney, and bladder cancer, reported the completion of the company’s $55.0 million Series B equity financing (Press release, Francis Medical, SEP 15, 2021, View Source;utm_medium=rss&utm_campaign=francis-medical-announces-close-of-55-million-series-b-equity-financing [SID1234587723]).

Solas BioVentures led the Series B round with other previous investors, including Arboretum Ventures, Coloplast A/S, H2Oey Ventures and Tonkawa. The company plans to use the Series B proceeds to fund the development of its proprietary prostate cancer treatment through FDA 510(k) approval, which includes a pivotal clinical study (VAPOR 2) for the management of prostate cancer, scheduled to begin enrollment in August 2022.

"We are thrilled to be leading the Series B round of financing for Francis Medical," said Dr. David Adair, managing director of Solas BioVentures. "At Solas, we focus our investments on technologies that have the potential to transform the standard of care and directly impact patient outcomes. We strongly believe that Francis Medical’s water vapor technology will become the preferred first-line therapy for treating prostate cancer. If we achieve our goals, men facing prostate cancer will have a less invasive option that not only aggressively treats their cancer, but also helps preserve their quality of life."

The funding comes on the heels of strong results from VAPOR 1, a prospective, multicenter, single-arm study that treated 15 patients with intermediate-risk, localized prostate cancer at four U.S. clinical centers. The VAPOR 1 study reported no serious adverse events, no device-related adverse events, and no unanticipated adverse device effects as its primary endpoint. In 87% of patients treated, six-month biopsy results indicated no remaining Gleason Grade Group 2 or greater clinically significant disease in the targeted treatment areas.

As the second most common cancer in U.S. men, the American Cancer Society estimates one in eight American men will be diagnosed with prostate cancer during their lifetime. Prostate cancer is a serious disease often treated with therapies that cause complications, such as urinary incontinence and erectile dysfunction. Francis Medical’s water vapor technology applies the thermal energy stored in a few drops of sterile water to deliver targeted treatments to the cancerous tissue through a simple transurethral procedure. The therapy is designed to ablate cancer cells while protecting surrounding structures, lessening the likelihood of life-altering side effects common with other prostate cancer treatments.

"Our Founder and Chief Technology Officer, Michael Hoey, and I would like to thank our investors, employees, and physician partners for achieving this important milestone," said Michael Kujak, president and CEO of Francis Medical. "This financing is a real testament to the significant accomplishments of the entire team. At Francis Medical, our shared vision from the beginning has been to bring this breakthrough technology to market to improve the lives of prostate cancer patients worldwide. We look forward to deploying these proceeds toward making this vision a reality."

4D pharma presents two clinical posters for MRx0518 at the ESMO Congress 2021

On September 15, 2021 4D pharma plc (AIM: DDDD, NASDAQ: LBPS), a pharmaceutical company leading the development of Live Biotherapeutic products (LBPs), a novel class of drug derived from the microbiome, reported that new biomarker analyses from two ongoing clinical trials of its lead immuno-oncology single strain Live Biotherapeutic, MRx0518, in both neoadjuvant and refractory solid tumor settings, at the European Society for Medical Oncology (ESMO) (Free ESMO Whitepaper) Congress, September 16-21, 2021 (Press release, 4d Pharma, SEP 15, 2021, View Source [SID1234587722]).

"At the core of 4D pharma’s platform is the importance of understanding the impact of Live Biotherapeutics on human biology to rationally select and develop candidates, predict and measure response. These new biomarker data provide us with critical guidance on the biological and mechanistic impact of MRx0518 therapy in patients with various solid tumors," said Dr. Alex Stevenson, Chief Scientific Officer, 4D pharma. "These new findings indicate the potential to predict patients most likely to respond to MRx0518 therapy based on tumor biology."

"Furthermore, the monotherapy data demonstrates that a short course of MRx0518 treatment is able to positively modulate prognostic indicators of immunotherapy response," he added. "We look forward to utilizing and implementing these important new findings as we work to progress this novel oncology Live Biotherapeutic through development towards approval."

Highlights of the two ESMO (Free ESMO Whitepaper) 2021 poster presentations:

Baseline biomarkers associated with clinical benefit in patients with solid tumors refractory to immune checkpoint inhibitors (ICIs) treated with live biotherapeutic MRx0518 in combination with pembrolizumab

Presentation Number: 1024P

Tumor biomarkers were assessed in patients with evaluable baseline samples (N = 12) in the ongoing Phase I/II study of MRx0518 in combination with anti-PD-1 immune checkpoint inhibitor (ICI) Keytruda (pembrolizumab)
At baseline, patients who achieved complete response, partial response or stable disease for at least six months (collectively ‘responders’, N=4) from the combination of MRx0518 with Keytruda (pembrolizumab) had significantly greater densities of CD3+FOXP3+CD8- regulatory T cells (Tregs) and CD3+KI67+ proliferating T cells in tumors at baseline, compared to patients with progressive disease (PD, N=8), p=0.0381 and p=0.0048, respectively.
In addition, significantly lower densities of CD68+ macrophages at baseline were observed in the tumor microenvironment of responders compared to patients with progressive disease, p=0.0303.
These data indicate the potential for MRx0518 to overcome Treg-mediated acquired resistance to cancer treatment, and presents a biomarker potentially able to identify patients most likely to respond to immunotherapy based on MRx0518. Further tumor sample analysis is ongoing for additional patients recruited into the study.

Neoadjuvant MRx0518 treatment is associated with significant gene and metagene signature changes in solid tumours

Presentation Number: 543P

Gene expression profiling of paired tumor samples pre- and post-MRx0518 monotherapy across multiple solid tumor types (N=15) showed that treatment with MRx0518 for two to four weeks was associated with anti-tumor immune activity including antigen presentation, innate immune processes, and interferon response.
Analysis of paired tumor samples also identified significant increases in mast cells, Th1, CD8+ T cell, neutrophil, endothelial cell and inflammatory chemokine metagene signatures following MRx0518 monotherapy.
Effects were particularly pronounced in the cohort of breast cancer patients (N=7), with significant increases observed in total and activated dendritic cells, CD8+ T cells and cytotoxic cells in the tumor micro-environment.
Functional metagene analysis also identified positive changes in prognostic indicators and metagene signatures predictive of immunotherapy response in patients with breast cancer, including inflammatory chemokines, cytotoxicity, lymphoid scores, and the Tumor Inflammation Signature (TIS)1 – demonstrated to retrospectively predict clinical benefit of anti-PD-(L)1 ICI therapy efficacy in various cancer types.
The immune biomarker data from this study of MRx0518, as a monotherapy dosed over a short period of just two to four weeks, demonstrates the potent activity of this oral Live Biotherapeutic directly on the human immune system, and the positive implications for clinical outcomes. This study is being conducted in collaboration with Imperial College London.

Both ePosters will be available under the "Posters and Publications" section of the 4D pharma website at www.4dpharmaplc.com at 7:30 GMT on Thursday 16th September 2021.

1 Ayers M, et al. J Clin Invest. 2017;127:2930–40

About MRx0518

MRx0518 is single strain Live Biotherapeutic product in development for the treatment of cancer. It is delivered as an oral capsule and stimulates the body’s immune system, directing it to produce cytokines and immune cells that are known to attack tumours. It is currently being evaluated in three clinical trials in cancer patients. MRx0518-I-001 is a neoadjuvant monotherapy study in a variety of solid tumours and is being conducted at Imperial College (London, UK). MRx0518-I-002 is in combination with KEYTRUDA (pembrolizumab) in patients who have previously progressed on anti PD-1 therapies. The Coordinating Investigator of the study is at The University of Texas MD Anderson Cancer Center, Houston, USA, with multiple additional sites in the US. The study is being conducted in collaboration with MSD, the tradename of Merck & Co., Inc., Kenilworth, NJ, USA. MRx0518-I-003 is in combination with preoperative radiotherapy in resectable pancreatic cancer. A fourth clinical trial, in collaboration with Merck KGaA and Pfizer Inc., of BAVENCIO (avelumab) in combination with MRx0518 as a first-line maintenance therapy for patients with locally advanced or metastatic urothelial carcinoma that has not progressed with first-line platinum-containing chemotherapy, is expected to commence in Q4 2021.