On April 23, 2018 Astellas Pharma Inc. (TSE: 4503, President and CEO: Kenji Yasukawa, Ph.D., "Astellas" ) reported that it submitted on March 23, 2018, a new drug application (NDA) for marketing approval of gilteritinib (generic name) in Japan for the treatment of adult patients with FLT3 mutation-positive (FLT3mut+) relapsed or refractory acute myeloid leukemia (AML) (Press release, Astellas Pharma US, APR 23, 2018, View Source [SID1234525608]). Astellas also submitted a NDA for approval of gilteritinib in the same patient population to the U.S. Food and Drug Administration (FDA) on March 29, 2018 (U.S. time) following the submission in Japan. The applications for marketing approval for gilteritinib are based on data from the ongoing pivotal Phase 3 ADMIRAL study investigating gilteritinib in adult patients with FLT3mut+ relapsed or refractory AML.

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Astellas is a pharmaceutical company dedicated to improving the health of people around the world. (PRNewsFoto/Astellas Pharma Inc.)

AML is a cancer that impacts the blood and bone marrow, and its incidence increases with age. In Japan, approximately 5,500 patients are diagnosed with AML each year1. Gilteritinib is an investigational compound that has demonstrated inhibitory activity against both internal tandem duplication (ITD) and tyrosine kinase domain (TKD), FLT3 mutations that are seen in approximately one-third of patients with AML.

In October 2015, the Japanese Ministry of Health, Labor and Welfare (MHLW) announced the selection of gilteritinib as one of the first products designated for SAKIGAKE2.

(1)

KantarHealth. TREATMENT ARCHITECTURE: JAPAN LEUKEMIA, ACUTE MYELOID. CancerMPact Japan, February 2017.

(2)

SAKIGAKE: SAKIGAKE designation system can shorten the review period with the following 3 approaches: 1) Prioritized Consultation, 2) Substantial Pre-application Consultation and 3) Prioritized Review.

And also, the system will help promote the development with the following 2 approaches: 4) Review Partner System (to be conducted by the Pharmaceuticals and Medical Devices Agency) and 5) Substantial Post-Marketing Safety Measures.

About Gilteritinib
Astellas is currently investigating gilteritinib in various FLT3 mutation-positive AML patient populations through several Phase 3 trials. Visit View Source to learn more about ongoing gilteritinib clinical trials.

Gilteritinib was discovered through a research collaboration with Kotobuki Pharmaceutical Co., Ltd., and Astellas has exclusive global rights to develop, manufacture and potentially commercialize gilteritinib. Gilteritinib has been granted Orphan Drug and Fast Track designation by the U.S. FDA, Orphan Drug Designation by the European Commission, and SAKIGAKE Designation and Orphan Drug Designation by the Japan Ministry of Health, Labor and Welfare.

About the ADMIRAL Study
The Phase 3 ADMIRAL trial is an open-label, multicenter, randomized study of gilteritinib versus salvage chemotherapy in adult patients with FLT3 mutations who are refractory to or have relapsed after first-line AML therapy. The co-primary endpoints of the trial are OS (Overall Survival) and CR (complete remission) / CRh (CR with partial hematological recovery) rate and the study is still ongoing. The study enrolled 371 patients with FLT3 mutations present in bone marrow or whole blood, as determined by central lab. Subjects have been randomized in a 2:1 ratio to receive gilteritinib (120 mg) or salvage chemotherapy.

On April 21, 2018 Molecular Partners AG (SIX: MOLN), a clinical-stage biopharmaceutical company developing a new class of drugs known as DARPin therapies*, reported that preliminary results from the ongoing Phase 2 study of MP0250 with bortezomib and dexamethasone in patients with relapsed refractory multiple myeloma (RRMM) were presented at the 1st European Myeloma Network Meeting in Turin (Press release, Molecular Partners, APR 21, 2018, View Source [SID1234525567]).

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The presentation in Turin focused on results from the first dose cohort of MP0250 with respect to safety and efficacy. Eight patients were treated with 8 mg/kg of MP0250 and five out of these eight patients showed a documented response: Four patients reached a partial response (PR) and one patient reached a very good partial response (VGPR) at the cut-off date. Four out of the five patients are still on treatment with individual treatment durations of 13, 21, 24 and 33 weeks, respectively. The safety profile was consistent with the known safety profiles of bortezomib and MP0250, respectively. The independent dose escalation committee recommended to continue the clinical study at the higher dose of 12mg/kg and the first patient in the second dose cohort has been dosed recently.

Prof. Dr. Hartmut Goldschmidt (Medical Clinic V, University clinic Heidelberg), the Primary Investigator of the phase 2 study, commented: "We are encouraged by the initial efficacy and good tolerability data of MP0250 in combination with bortezomib and dexamethasone. Despite upcoming new treatment options, multiple myeloma remains an incurable disease and new molecules with innovative mechanism of actions are needed."

"We are pleased by the remarkable activity and the good safety profile that we have seen in the first cohort of this study. We are looking forward to patients being treated with the higher dose of MP0250 (12 mg/kg) and the additional phase 1b/2 study of MP0250 in combination with osimertinib in EGFR-mutated NSCLC," said Dr. Andreas Harstrick, Chief Medical Officer at Molecular Partners.

MP0250 is a proprietary DARPin drug candidate neutralizing VEGF and HGF and thus blocking key escape pathways and resistance. Increases in VEGF and HGF are associated with disease progression in multiple myeloma and have been linked to poor prognosis. They are known to be able to stimulate neovascularization, bone destruction, and myeloma proliferation, migration, and adhesion in the bone marrow. MP0250 shows activity in many preclinical tumor models, including in multiple myeloma models in which it enhances the effects of bortezomib on inhibition of M protein production and bone lysis and reduces invasion of tumor cells. MP0250 has shown a favorable safety profile in a phase 1 clinical study in 45 patients with advanced solid tumors.

In the ongoing phase 2 clinical study[1], the safety and efficacy of MP0250 is examined in combination with bortezomib (Velcade) and dexamethasone in patients with relapsed and refractory multiple myeloma (RRMM) who have failed standard therapies. The study is performed in Germany, Poland and Italy. A total of 40 patients are planned to be treated, 12 patients in the dose-escalation phase (Part 1) to establish a safe dose, and an additional 28 patients in the dose-expansion phase (Part 2) resulting in a total of 34 patients at the target dose.

Additional safety and efficacy data are expected by the end of 2018.

An additional phase 1b/2 study will evaluate MP0250 in combination with osimertinib in patients with EGFR-mutated NSCLC pretreated with osimertinib. The study is conducted in the US and is open for patient enrollment2.

[1] ClinicalTrials.gov identifier NCT03136653
2 ClinicalTrials.gov identifier NCT03418532

Financial Calendar
April 26, 2018 – Q1 2018 Management Statement
August 30, 2018 – Publication of 2018 Half-year Results
November 01, 2018 – Q3 2018 Management Statement
View Source

About the DARPin Difference
DARPin therapeutics are a new class of protein therapeutics opening an extra dimension of multi-specificity and multi-functionality. DARPin candidates are potent, specific, safe and very versatile. They can engage in more than 5 targets at once, offering potential benefits over those offered by conventional monoclonal antibodies or other currently available protein therapeutics. The DARPin technology is a fast and cost-effective drug discovery engine, producing drug candidates with ideal properties for development and very high production yields.
With their good safety profile, low immunogenicity and long half-life in the bloodstream and the eye, DARPin therapies have the potential to advance modern medicine and significantly improve the treatment of serious diseases, including cancer and sight-threatening disorders. Molecular Partners is partnering with Allergan to advance clinical programs in ophthalmology, and is advancing a proprietary pipeline of DARPin drug candidates in oncology. The most advanced global product candidate is abicipar, a molecule currently in Phase 3, in partnership with Allergan.
Several DARPin molecules for various ophthalmic indications are also in development. The most advanced systemic DARPin molecule, MP0250, is in Phase 1 clinical development for the treatment of solid tumors and in Phase 2 development for hematological tumors. In addition, Molecular Partners intends to further evaluate MP0250 for solid tumors in a phase 1b/2 trial for EGFR-mutated NSCLC. MP0274, the second-most advanced DARPin drug candidate in oncology, has broad anti-HER activity; it inhibits HER1, HER2 and HER3-mediated downstream signaling via Her2, leading to induction of apoptosis. MP0274 has moved into Phase 1. Molecular Partners is also advancing a growing preclinical pipeline that features several immuno-oncological development programs. DARPin is a registered trademark owned by Molecular Partners AG.

On April 20, 2018 Varian (NYSE: VAR) reported it has received FDA 510(k) clearance for its Calypso Anchored Beacon transponder. Used with a Varian TrueBeam, Edge and Clinac C-series medical linear accelerators, the Calypso system and Anchored Beacon transponder detects even slight movements of a tumor and helps clinicians deliver lung stereotactic body radiotherapy (SBRT) more precisely (Press release, Varian Medical Systems, APR 20, 2018, View Source [SID1234525563]).

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The Calypso system works by implanting the Anchored Beacon transponders in small airways within or near the tumor target. The Anchored Beacon transponders feature five small "legs" that provide stable fixation to prevent the transponder from moving. The transponders emit non-ionizing electromagnetic signals that are tracked in real-time and used to keep a treatment beam on target.

The Calypso System is the only device on the market that delivers real-time, continuous (25 Hz update rate), 3D tumor position information, improving confidence that the prescribed dose has been delivered to the tumor.

"The 510(k) clearance of the Anchored Beacon transponder expands the application of the Calypso system platform," said Ed Vertatschitsch, vice president, Global Portfolio Solutions, Varian. "Using the Calypso system and Anchored Beacon transponder, clinicians can deliver dose to lung tumors with increased confidence and accuracy."

For more information on the Calypso system, visit www.varian.com/calypso.

On April 20, 2018 Heat Biologics, Inc. presented investor presentation (Presentation, Heat Biologics, APR 20, 2018, View Source [SID1234525815]).

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On April 20, 2018 Dr. Michael Rosenblum and his team at MD Anderson Cancer Center, Houston, TX, reported that presented updated data on TGI (Targeted Granzyme B immunotherapy) at the 2018 American Association of Cancer Research Annual Meeting (AACR) (Free AACR Whitepaper) (Press release, Mirata BioPharma, APR 20, 2018, View Source [SID1234525564]). The research was supported by Mirata Biopharma LLC and conducted by the Clayton Foundation for Research ("Clayton Foundation").

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Dr. Rosenblum’s team developed a fusion protein, GrB-Fc-IT4 (MRT-101), that contains a humanized scFv binding domain targeting the cell surface receptor Fn14, an antigen highly expressed in a variety of solid tumors, and containing the human serine protease granzyme B (GrB) as the cytotoxic payload. The construct includes the IgG hinge Fc domain linker for efficient dimerization and an overall high molecular weight, thereby designed to provide a prolonged serum half-life (~40 h in mice). This unique format mimics human immune effector cell function and induces target cell death through the activation of a variety of well described pro-apoptotic cascade signals.

The poster, entitled "Molecular mechanistic and in vivo efficacy studies of Fn14-targeted fusion constructs containing human granzyme B," demonstrated that Western blot studies on human TNBC cells (MDA-MD-231) have shown that intact MRT-101 is translocated into the cytosol in less than 1 hour after exposure and is detectable in the cytosol for at least 8 hours. The free GrB component is also detected by the Western blot 4 hours after treatment and persists for up to 8 hours. Both of these agents trigger apoptotic cascades through activation of various caspases and induction of mitochondrial damage. Studies demonstrating cytochrome C release and mitochondrial depolarization are ongoing and will be reported. Incubation with the lysosomotropic agent chloroquine did not alter the IC50 of MRT-101, suggesting that the fusion protein is not appreciably held in the endosomal compartment.

In vivo studies have shown that MRT-101 is well tolerated in BALB/c mice after intravenous administration of 5 doses at 20 mg/kg/dose. This dose level showed no evidence of toxicity in any of the major organs such as liver and kidneys. In vivo efficacy studies conducted on NSGNOD scid mice demonstrated significant tumor growth inhibition of established orthotopic breast tumors (MDA-MB-231), with no tumor growth for up to 30 days after implantation. Treatment of nude mice bearing lung PDX tumors showed a 60% tumor growth inhibition when compared to the vehicle control group. These results, in combination with previous in vitro and in vivo studies, demonstrate that the completely human MRT-101 construct is a selective, highly potent, non-toxic and effective antigen-driven drug with significant potential for the treatment of Fn14 positive tumors that acts through a new and unique mechanism of action.

Full poster from the AACR (Free AACR Whitepaper) can be accessed via Mirata Biopharma website: View Source