On January 21, 2022 Medivir AB (Nasdaq Stockholm: MVIR-B) reported that an e-poster entitled "Liver biopsy biomarkers in a phase 1 study of the prodrug MIV-818 demonstrates proof-of-concept for cancer in the liver" will be presented at the European Association for the Study of the Liver (EASL) Liver Cancer Summit 3-4 February (Press release, Medivir, JAN 21, 2022, View Source [SID1234606692]). The Abstract (PO-221) is available on the EASL website (View Source).

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About fostroxacitabine bralpamide
Fostroxacitabine bralpamide (also named MIV-818) is a pro-drug designed to selectively treat liver cancers and to minimize side effects. It has the potential to become the first liver-targeted and orally administered drug for patients with HCC and other forms of liver cancer. Fostroxacitabine bralpamide has completed a phase 1b monotherapy study, and a combination study in HCC was recently initiated.

About primary liver cancer
Primary liver cancer is the third leading cause of cancer-related deaths worldwide and hepatocellular carcinoma (HCC) is the most common cancer that arises in the liver. Although existing therapies for advanced HCC can extend the lives of patients, treatment benefits are insufficient and death rates remain high. There are 42,000 patients diagnosed with primary liver cancer per year in the US and current five-year survival is 11 percent. HCC is a heterogeneous disease with diverse etiologies, and lacks defining mutations observed in many other cancers. This has contributed to the lack of success of molecularly targeted agents in HCC. The limited overall benefit, taken together with the poor overall prognosis for patients with intermediate and advanced HCC, results in a large unmet medical need.

On January 21, 2022 Arrowhead Pharmaceuticals, Inc. (NASDAQ: ARWR) reported that it will host a webcast and conference call on February 2, 2022, at 4:30 p.m. ET to discuss its financial results for the fiscal 2022 first quarter ended December 31, 2021 (Press release, Arrowhead Pharmaceuticals, JAN 21, 2022, View Source [SID1234606697]).

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Conference Call and Webcast Details

Investors may access a live audio webcast on the Company’s website at View Source For analysts that wish to participate in the conference call, please dial 855-215-6159 or 315-625-6887 and provide Conference ID 9844328.

A replay of the webcast will be available on the Company’s website approximately two hours after the conclusion of the call and will remain available for 90 days. An audio replay will also be available approximately two hours after the conclusion of the call and will be available for 3 days. To access the audio replay, dial 855-859-2056 or 404-537-3406 and provide Conference ID 9844328.

On January 20, 2022 Celleron Therapeutics, the UK-based company developing personalised medicines for cancer patients, reported that a 14.5% patient two-year survival rate following treatment in their Phase II clinical trial testing the immune check point inhibitor (ICI) nivolumab in combination with zabadinostat in patients suffering from advanced micro-satellite stable colorectal cancer (MSS CRC) (Press release, Celleron, JAN 20, 2022, https://cellerontherapeutics.com/celleron-therapeutics-reports-survival-data-from-zabadinostat-combined-with-nivolumab-in-micro-satellite-stable-colorectal-cancer-patients/ [SID1234605617]).

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Celleron Therapeutics’ Phase II clinical trial (the CAROSELL Study) tested the effect of zabadinostat (formerly CXD101) in combination with nivolumab in MSS CRC, which typically does not respond to immune checkpoint inhibitors agents as mono-therapy. The clinical trial strategy rests on compelling pre-clinical results which provide novel insights into how zabadinostat and ICI drugs work together to re-engage recognition of tumours by the immune system, frequently described as turning ‘cold’ tumours ‘hot’. The patients studied, had advanced or metastatic disease, having relapsed after at least two previous lines of therapy.

Enrolment to the Phase II study was completed in May 2019, and all ongoing subjects have completed the study treatment. Interim analysis of the evaluable MSS CRC subjects saw a significant level of durable disease control (stable disease plus partial response) and overall response rate (ORR). Patients have now been followed-up for survival post-study treatment, where 14.5% of the subjects had survived for two years or more, from first dose of study treatment. This clinical activity compares favourably with products that have been approved to treat MSS CRC, such as Stivarga (regorafenib) and Lonsurf (trifluridine/tipiracil tablets).

Professor David Kerr, Chief Medical Officer and Founder of Celleron Therapeutics, commented:

"We continue to be extremely excited by these encouraging Phase II trial results which add to the continuing evidence that zabadinostat is a clinically viable drug with wide utility in metastatic colorectal cancer. We expect to further develop our understanding of these responses with our upcoming precision-medicine Phase III study".

About Colorectal Cancer

Colorectal cancer is the second most common tumour type in women, and the third most common in men, globally. The approximate five-year survival rate for colorectal cancer patients in the United States is 10% for those with advanced metastatic disease (Stage IV).

Surgery is indicated for localized disease, whilst chemotherapy has been the standard management for patients with metastatic colorectal cancer. Two agents have been approved for third line management of advanced colorectal cancer, namely regorafenib (Stivarga) and Trifluridine-tipiracil hydrochloride (Lonsurf).

A subset (5%) of colorectal cancers is characterized with deficient DNA mismatch repair (dMMR or microsatellite instability, MSI). These tumours tend to have a high expression of checkpoint proteins (PD-1 and PD-L1), which interfere with the body’s normal anti-tumour T-cell response. By disabling these proteins, immune checkpoint inhibitors (ICI) such as nivolumab allow the immune system to function properly, and T-cells to kill tumour cells.

However, the majority of patients with a normal Mismatch Repair proficient expression, the microsatellite phenotype is stable (MSS), antigen presentation is believed to be much decreased, and the tumour is thus resistant to checkpoint inhibition. Most MSS patients will ultimately relapse or become resistant to chemotherapy. There remains a very significant unmet clinical need to find novel agents, singly or in combination, for the treatment of these late-stage patients.

On January 20, 2022 Oncternal Therapeutics, Inc. (Nasdaq: ONCT), a clinical-stage biopharmaceutical company focused on the development of novel oncology therapies, reported that it will host a key opinion leader (KOL) webinar on hematological malignancies and prostate cancer on Tuesday, January 25, 2022 from 2:30 – 4:30 pm (ET) (Press release, Oncternal Therapeutics, JAN 20, 2022, View Source [SID1234605636]).

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The webinar will feature a presentation by KOL Michael Wang, M.D., from the MD Anderson Cancer Center, who will discuss the current landscape and unmet medical need in the treatment of Mantle Cell Lymphoma (MCL). Oncternal’s management will provide further details on the development of zilovertamab, the company’s investigational anti-ROR1 monoclonal antibody, including the planned registrational Phase 3 superiority study ZILO-301, which is expected to be initiated in the first half of 2022, following the company’s recently announced agreement with the U.S. Food and Drug Administration (FDA) regarding the study design and major details. Dr. Wang will serve as the U.S. Principal Investigator and Chairman of the Steering Committee for this study. Oncternal’s management will also discuss the progress in the development of ONCT-808, its lead candidate of its autologous CAR-T program targeting ROR1-expressing malignancies.

A second KOL, Evan Yu, M.D., from the Fred Hutchinson Cancer Research Center, will provide perspectives on current standards of care and highlight the potential of next generation treatments for patients with advanced prostate cancer. Oncternal’s management will present an overview of the preclinical data and development plans for ONCT-534, the lead candidate in its preclinical dual-action androgen receptor inhibitor (DAARI) program, a potential next-generation treatment option for patients with resistant prostate cancer.

A live question and answer session will follow the formal presentations. To register for the webinar, please click here.

Michael Wang, M.D. is Professor in the Department of Lymphoma and Myeloma at MD Anderson Cancer Center. Dr. Wang has published more than 250 peer-reviewed papers and has presented his work at meetings nationally and internationally. He is the current Director of Mantle Cell Lymphoma (MCL) Program of Excellence and Co-Director of Clinical Trials at MD Anderson. During the past 22 years, he has focused on preclinical and clinical research and established a MCL-SCID-hu mouse model, which is the first human primary MCL animal model for the study of the biology and treatment of MCL. Dr. Wang has pioneered the work to improve the treatment of patients with MCL, including the introduction of BTK inhibitors such as ibrutinib and acalabrutinib in the treatment algorithm, and has performed extensive work with CAR-T cells for the treatment of these patients. His work has been published in the most prestigious medical journals, such as the New England Journal of Medicine and the Lancet. He is currently the PI of the B-Cell Lymphoma Moon Shot Program at MD Anderson. Dr. Wang obtained his M.D. from Shandong Medical University and M.S. from Beijing University, Medical School. He completed his clinical training as a resident at Norwalk Hospital, Norwalk, Conn., and as a Fellow in Oncology and in Hematology.

Evan Ya-Wen Yu, M.D., is a medical oncologist who treats prostate, bladder, and testicular cancer patients at Seattle Cancer Care Alliance (SCCA), Fred Hutch’s clinical care partner. In addition, Dr. Yu serves as the clinical research director of Genitourinary Medical Oncology at Seattle Cancer Care Alliance. Dr. Yu is also a professor of medical oncology at the University of Washington School of Medicine, a professor in clinical research at Fred Hutchinson Cancer Research Center, and medical director of clinical research support at Fred Hutchinson Cancer Research Consortium. As a physician-scientist, he provides a personalized-medicine approach to test novel therapies and discover unique cancer biomarkers. Dr. Yu also has a background in basic science; as a researcher, he studies the biological mechanisms of drug sensitivity and treatment resistance. In addition, his interests include cancer biomarkers, imaging (PET and MRI scans), and bone health. His overall goal is to discover novel biomarkers that can help guide treatment and aid in developing novel treatments for prostate cancer.

About Zilovertamab (formerly Cirmtuzumab)
Zilovertamab is an investigational, potentially first-in-class monoclonal antibody targeting ROR1, or Receptor tyrosine kinase-like Orphan Receptor 1. Zilovertamab is currently being evaluated in a Phase 1b/2 clinical trial in combination with ibrutinib for the treatment of MCL or chronic lymphocytic leukemia (CLL), in a collaboration with the University of California San Diego (UC San Diego) School of Medicine and the California Institute for Regenerative Medicine (CIRM). In addition, Oncternal is supporting two investigator-sponsored studies being conducted at the UC San Diego School of Medicine: (i) a Phase 1b clinical trial of zilovertamab in combination with paclitaxel for the treatment of women with HER2-negative metastatic or locally advanced, unresectable breast cancer, and (ii) a Phase 2 clinical trial of zilovertamab in combination with venetoclax, a Bcl-2 inhibitor, in patients with relapsed/refractory CLL.

ROR1 is a potentially attractive target for cancer therapy because it is an onco-embryonic antigen – not usually expressed on adult cells, and its expression confers a survival and fitness advantage when reactivated and expressed by tumor cells. Researchers at the UC San Diego School of Medicine discovered that targeting a critical epitope on ROR1 was key to specifically targeting ROR1 expressing tumors. This led to the development of zilovertamab, that binds this critical epitope of ROR1, which is highly expressed on many different cancers but not on normal tissues. Preclinical data showed that when zilovertamab bound to ROR1, it blocked Wnt5a signaling, inhibited tumor cell proliferation, migration and survival, and induced differentiation of the tumor cells. The FDA has granted Orphan Drug Designations to zilovertamab for the treatment of patients with MCL and CLL/small lymphocytic lymphoma. Zilovertamab is in clinical development and has not been approved by the FDA for any indication.

On January 20, 2022 Transgene (Euronext Paris: TNG), a biotech company that designs and develops virus-based immunotherapeutics against cancer, and BioInvent International AB ("BioInvent") (Nasdaq Stockholm: BINV), a biotech company focused on the discovery and development of novel and first-in-class immune-modulatory antibodies for cancer immunotherapy, jointly reported the publication of extensive preclinical proof-of-concept data for BT-001 in the Journal for ImmunoTherapy of Cancer (JITC) (Press release, Transgene, JAN 20, 2022, View Source [SID1234605652]). This peer-reviewed article demonstrates that their co-developed clinical stage product, based on Transgene’s patented oncolytic vector and encoding BioInvent’s proprietary anti-CTLA-4 antibody, has the potential to provide greater therapeutic benefit than systemically administered anti-CTLA-4 antibodies.

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Systemically administered anti-CTLA-4 antibodies, such as the approved ipilimumab, have demonstrated substantial efficacy but also clinically-limiting toxicity.

The JITC paper provides in vivo evidence that vectorized anti-CTLA-4 antibodies delivered intratumorally (i.t.) can improve safety by reducing their systemic exposure. Efficacy may also be improved, with evidence from the immunocompetent murine model showing that vectorized anti-CTLA-4 antibodies have anti-tumoral activity even against ‘cold tumors’ that are resistant to systemically-delivered checkpoint inhibitors. Furthermore, the precise targeting of the antibody to a unique functional epitope of CTLA-4 provides a higher level of regulatory T cells (Treg) depletion than ipilimumab.

"This strong preclinical data supports the development of our oncolytic virus BT-001 as an effective agent to treat solid tumors. We have vectorized a uniquely targeted anti-CTLA-4 antibody for intratumoral delivery and shown in vivo evidence that this reduces systemic toxicity, addresses ‘cold tumors’ and provides excellent tumor-selective Treg depletion. We are keenly anticipating progress in our ongoing Phase 1/2a clinical study with BT-001," said Bjorn Frendéus, Chief Scientific Officer of BioInvent.

"These data demonstrate the relevance of the approach which is based on combining our respective technologies to fully exploit the synergy between oncolytic vector, targeted delivery of a potent payload targeting immunosuppressive cells, and recruitment of effector T cells. The antitumor properties showed in this JITC publication give us great confidence in the results we expect from the further clinical development of BT-001," added Éric Quéméneur, Executive VP & Chief Scientific Officer of Transgene.

The safety-relevant data, published in JITC, show that a murine vector version of BT-001 delivered sustained levels of CTLA-4-receptor-saturating antibodies within tumors but low, sub-saturating exposure in blood and the non-tumor tissue. These antibody levels were associated with high depletion of Tregs in the tumor but the absence of systemic Treg depletion, notably in the spleen.

The study also provides several key insights into likely mechanisms underlying the efficacy of BT-001. Vectorized anti-CTLA-4:

triggered both Fcγ-receptor-dependent Treg depletion and antigen cross-presentation, mechanisms known to trigger and promote long-lasting, systemic, CD8+ T cell antitumor immunity;
showed broad antitumor activity, including activity against murine ‘cold tumor’ models which are resistant to systemic checkpoint inhibitors;
showed additive or synergistic anti-tumor activity when combined with anti-PD-1.
The JITC paper is titled "Vectorized Treg-depleting αCTLA-4 elicits antigen cross-presentation and CD8+ T cell immunity to reject ‘cold’ tumors" and can be accessed here.

Recruitment in the ongoing Phase I/IIa clinical study of BT-001 (NCT04725331) in Europe is progressing steadily. The trial assesses BT-001 as a single agent and in combination with the PD-1 checkpoint inhibitor pembrolizumab against solid tumors. Initial Phase I data are expected in the first half of 2022.

About BT-001

BT-001 is an oncolytic virus generated using Transgene’s Invir.IO platform and its patented large-capacity VVcopTK-RR- oncolytic virus, which has been engineered to encode both a Treg-depleting human recombinant anti-CTLA-4 antibody generated by BioInvent’s proprietary n-CoDeR/F.I.R.S.T platforms, and the human GM-CSF cytokine. By selectively targeting the tumor microenvironment, BT-001 is expected to elicit a much stronger and more effective antitumoral response. As a consequence, by reducing systemic exposure, the safety and tolerability profile of the anti-CTLA-4 antibody will be greatly improved.

BT-001 is being co-developed as part of a 50/50 collaboration on oncolytic viruses between Transgene and BioInvent. To know more on BT-001, watch our video here.