On January 4, 2018 ImmunoGen, Inc. (Nasdaq: IMGN), a leader in the expanding field of antibody-drug conjugates (ADCs) for the treatment of cancer, reported that the first patient has been treated with IMGN632 in a Phase 1 clinical trial of patients with CD123-positive hematological malignancies, including acute myeloid leukemia (AML) and blastic plasmacytoid dendritic cell neoplasm (BPDCN) (Press release, ImmunoGen, JAN 4, 2018, View Source [SID1234522879]).

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IMGN632 uses ImmunoGen’s novel indolino-benzodiazepine payload, DGN549, which alkylates DNA without crosslinking, as well as novel linker technology with a CD123-targeting antibody. In preclinical studies with IMGN632, ImmunoGen has reported potent and selective activity against AML cells with lower cytotoxicity to normal myeloid progenitor cells than an ADC designed to crosslink DNA.1 Supporting preclinical data for IMGN632 have also shown compelling activity in AML and acute lymphoblastic leukemia (ALL) models with single and multi-dose regimens.2,3 These data suggest that IMGN632 has the potential to be a highly effective, yet tolerable ADC.

"We continue to rapidly advance our novel IGN portfolio in a number of hematological malignancies and are pleased to be moving our second IGN ADC, IMGN632, into the clinic," said Anna Berkenblit, M.D., VP and Chief Medical Officer of ImmunoGen. "Our IGN payloads were developed to meet the dual challenges of achieving high potency against target cells, while enabling continued patient treatment. We believe IMGN632 has the potential to be a highly effective therapy with favorable tolerability for the treatment of patients with CD123-positive hematologic malignancies, including AML and BPDCN, cancers where new therapies are desperately needed."

The Phase 1 trial in AML and BCPDN will follow a once every three week dosing schedule while in its dose-finding stage. The selected dose will then be used in expansion cohorts assessing IMGN632 in patients with BPDCN, AML, ALL, and other CD123-positive hematologic malignancies.

"We are excited to be leading off the clinical evaluation of IMGN632, a potential new treatment option for patients with CD123-positive hematologic malignancies," said Hagop M. Kantarjian, M.D., professor and chair of the Department of Leukemia at the University of Texas MD Anderson Cancer Center and principal investigator of the trial of IMGN632.

Data presented at the American Society of Hematology (ASH) (Free ASH Whitepaper) Annual Meeting (ASH) (Free ASH Whitepaper) 2017 demonstrated promising activity and safety with IMGN632 in preclinical models of B-cell ALL (B-ALL).4 CD123 expression is prevalent across ALL subtypes, including 90% of B-ALL and nearly half of T-cell acute lymphoblastic leukemia. IMGN632 demonstrated promising activity against B-ALL cell lines and patient samples in vitro, including the elimination of more than 90% of B-ALL blasts in 6 out of 8 patient samples. Normal cells were not affected by IMGN632 at 100-fold higher concentrations.

This is the second clinical trial using IGNs, a new class of cancer-killing agents developed by ImmunoGen for use in ADCs. ImmunoGen recently reported findings from the Company’s ongoing Phase 1 study of IMGN779 in patients with relapsed or refractory adult AML whose tumors express CD33.5 The data demonstrate that IMGN779 is well-tolerated with no dose-limiting toxicities, pharmacokinetic exposures and pharmacodynamic CD33 saturation increasing with dose, and anti-leukemia activity observed in patients with poor prognostic features.

About IMGN632
IMGN632 is a humanized anti-CD123 ADC that is a potential treatment for AML, BPDCN, myelodysplastic syndrome, B-cell ALL and other CD123-positive malignancies. IMGN632 uses a novel IGN payload, linker and antibody technology, and has demonstrated potent and selective activity, with minimal cytotoxic effects, in preclinical models of AML and ALL.6,7

About IGNs
Indolino-benzodiazepine agents, or IGNs, are a new class of cancer-killing agent developed by ImmunoGen for use in ADCs. IGN payloads were designed to meet the dual challenges of achieving high potency against target cells, while having a tolerability profile that can enable continued patient treatment. These ultra-potent, DNA-acting IGNs alkylate DNA without crosslinking, which preclinically has resulted in potent anti-leukemia activity with relative sparing of healthy cells.8,9

About Acute Myeloid Leukemia (AML)
AML is a cancer of the bone marrow cells that produce white blood cells. It causes the marrow to increasingly generate abnormal, immature white blood cells (blasts) that do not mature into effective infection-fighting cells. The blasts quickly fill the bone marrow, impacting the production of normal platelets and red blood cells. The resulting deficiencies in normal blood cells leave the patient vulnerable to infections, bleeding problems and anemia.

It is estimated that, in the U.S. alone, 21,380 patients will be diagnosed with AML this year and 10,590 patients will die from the disease.10

About Blastic Plasmacytoid Dendritic Cell Neoplasm (BPDCN)

BPDCN is a disease of the bone marrow and blood that affects multiple organs, including the lymph nodes and the skin. It often presents as leukemia or lymphoma. There are little data about BPDCN and there is no established treatment. The average age at diagnosis is 60 to 70 years. There are more men than women who are diagnosed with BPDCN.11,12

On January 4, 2018 Rasna Therapeutics, Inc. (OTCQX: RASP), a clinical stage biotechnology company focused on the development of disease-modifying drugs for hematological malignancies, reported follow up Phase II clinical data showing that 4 out of 9 (44%) evaluable AML patients carrying the NPM1 gene mutation treated with actinomycin D ("Act D"), achieved complete remission (CR) (Press release, Rasna Therapeutics, JAN 4, 2018, View Source [SID1234522893]). Treatment with Act D was well-tolerated except that patients experienced oral mucositis as the major toxicity. Rasna Therapeutics has developed a proprietary nanoparticle based formulation of Act D (RASP-101), which is anticipated to maximize efficacy while minimizing oral mucositis. RASP-101 could potentially be a first-in-class modality for treatment of NPM1-mutated acute myeloid leukemia (AML).
NPM1-mutated AML is a specific genetic leukemia entity that accounts for approximately one-third cases of AML in adults. As we reported previously, intravenous treatment of refractory or relapsed NPM1-mutated AML patients with Act D (12.5 µg or 15 µg/day) for 5 consecutive days produced hematological complete response in some of them (Falini et al., N Eng J Med. 373: 12, 2015).

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In a follow-up phase II clinical study (ActD-AML-PG01, EudraCT 2014-000693-18) in refractory/relapse (R/R) AML patients carrying NPM1 gene mutation, treatment with Act D at 15 µg/kg/day for 5 days every 28 days induced CR in 4 out of the 9 evaluable patients (44.4%) with only 1 or 2 cycles of therapy. Three out of the 4 (75%) patients who obtained CR relapsed after 3, 5 and 7 months, respectively. One patient underwent haploidentical allogeneic PBSC transplantation at 3 months after CR achievement and is alive in molecular CR (MRD-negative) after 24 months.

"The precise mechanism of action of Act D in NPM1-mutated AML is still not clearly understood. Follow up data confirms our earlier findings and further support the use of Act D to induce complete hematological remissions with possible long-term molecular responses in NPM1-mutated AML patients. To note, our first previously reported NPM1-mutated AML patient (resistant to hypomethylating therapy) treated with Act D remains in molecular remission at over 3 years since CR achievement," said Dr. Brunangelo Falini, a member of the scientific advisory board of Rasna Therapeutics, Inc.

"We have developed a proprietary formulated Act D (RASP-101), which we anticipate will produce a superior clinical outcome with improved efficacy and safety profile. Emerging data from the multicenter clinical studies will allow us to develop a biomarker strategy to select responsive patients and improve clinical outcome for this unmet clinical need" commented Alessandro Padova, Chairman of Rasna.

About Actinomycin D (Dactinomycin)
Actinomycin D, also known as dactinomycin, a cytotoxic antibiotic produced by Streptomyces parvullus, was approved for medical use in the United States in 1964. It is on the World Health Organization’s List of Essential Medicines, the most effective and safe medicines needed in a health system. It is believed to work by blocking RNA synthesis. The drug has been used to treat a number of types of cancers, including Wilms tumor, rhabdomyosarcoma, Ewing’s sarcoma, trophoblastic neoplasm, testicular cancer, and certain types of ovarian cancer.

About Dr. Brunangelo Falini, M.D.
Brunangelo Falini is the head of the Institute of Hematology and Hemopoietic Stem Cell Transplantation at the University of Perugia, Perugia, Italy. His research activity has mainly focused on the genetic characterization of lymphomas and leukemias using monoclonal antibodies and, more recently, NGS technologies. He led the research group who discovered NPM1 mutations in AML in 2005 and the BRAF-V600E mutation in hairy cell leukemia in 2011. Both these seminal discoveries have already translated into a better diagnosis and therapy of patients affected by these hematological malignancies. Dr. Falini is the recipient of numerous prestigious prizes, including the "Josè Carreras Award" from EHA (Free EHA Whitepaper) (Barcelona, 2010), the "Leopold Griffuel Prize" from ARC (Paris, 2015) and the "Prize for Excellence in Medicine" from the American-Italian Cancer Foundation (New York, 2017).

On January 4, 2018 ActoBio Therapeutics, Inc., a wholly owned subsidiary of Intrexon Corporation (NYSE: XON), a leader in the engineering and industrialization of biology to improve the quality of life and health of the planet, reported that Pieter Rottiers, PhD, ActoBio’s Chief Executive Officer, will present at the Biotech Showcase 2018 Conference in San Francisco on Monday, January 8th at 2 p.m. Pacific Time (Press release, Intrexon, JAN 4, 2018, View Source [SID1234522881]). The presentation will highlight the innovative, proprietary ActoBiotics drug delivery platform for oral and topical administration of biologicals to address unmet medical needs for diverse health indications.

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ActoBio Therapeutics combines world-class science, preclinical and clinical-stage products, and a leadership team with over 20 years hands-on experience developing the platform. ActoBio has reached a significant level of development and is well prepared to move forward to create significant new therapeutic modalities across a broad set of markets with strong growth dynamics including oral, gastrointestinal, and autoimmune/allergic disorders. Using the innovative ActoBiotics platform, we have built a strong R&D pipeline with the latest stage therapeutic candidate in Phase 2b and an extensive portfolio of candidates both partnered and self-owned ready for clinical development across a number of conditions," Dr. Rottiers commented.

A live webcast of the presentation will be available on the Investors section of Intrexon’s website at View Source Replay of the webcast will be available for 30 days following the event.

On January 4, 2018 Celsion Corporation (NASDAQ: CLSN), an oncology drug development company, reported that the U.S. Food and Drug Administration (FDA), following the customary 30 day review period, has accepted its submission without comment, providing clearance for the OVATION II Study, the Company’s planned Phase I/II clinical trial of GEN-1, its DNA-based immunotherapy for the localized treatment of ovarian cancer (Press release, Celsion, JAN 4, 2018, View Source [SID1234522887]). The Phase I/II trial was developed with extensive input from the Company’s Medical Advisory Board. The OVATION II Study builds on the highly promising clinical and translational research data from the Phase IB dose-escalating OVATION Study where enrolled patients received escalating weekly doses of GEN-1, from levels beginning at 36mg/m², to 47mg/m², 61mg/m² and 79mg/m² weekly for 8 treatments in total, in combination with neoadjuvant chemotherapy, followed by interval debulking surgery.

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This next Phase I/II study is designed with a single dose escalation phase to 100 mg/m² to identify a safe and tolerable dose of GEN-1 while maximizing an immune response, followed by a continuation at the selected dose in Phase II in an open label, 1:1 randomized design up to 90 patients with Stage III/IV ovarian cancer at up to fifteen U.S. centers. The study is powered to show a 33% improvement in the primary endpoint, progression-free survival (PFS), when comparing GEN-1 with neoadjuvant chemotherapy versus neoadjuvant chemotherapy alone.

Progression-free survival for patients treated per protocol in the Phase IB OVATION Study continues to be followed. Of the thirteen patients who received GEN-1 treatment in all four dose escalating cohorts, only four patients’ cancer has progressed to-date. This compares favorably to the historical median progression-free survival of 12 months for newly-diagnosed patients with Stage III and IV ovarian cancer that undergo neoadjuvant chemotherapy followed by interval debulking surgery. Summarized below are the latest PFS results for all patients treated per protocol in the Phase IB OVATION Study:

Cohort 1 (36 mg/m²) – All patients have progressed; Average PFS was 19.25 months; Longest progression-free patient in 1st cohort was 24.8 months.

Cohort 2 (47 mg/m²) – No patients have progressed after 21 months.

Cohort 3 (61 mg/m²) – One patient has progressed after 14 months; Two other patients in 3rd cohort are progression free over 17 months.

Cohort 4 (79 mg/m²) – No patients have progressed; Average PFS for these five patients in 4th cohort is 14 months.
"In previous clinical studies performed to date, GEN-1 has demonstrated excellent safety and impressive clinical activity supported with dose dependent, pro-immune improvement in the tumor micro environment. A onetime dose escalation may prove to be even more impressive," stated Dr. Nicholas Borys, Celsion’s senior vice president and chief medical officer. "As we continue to follow patients, the latest PFS analysis from the OVATION Study is showing a median of at least 15.4 months in the as-treated group which compares favorably to a historical control of 12 months. Our highest dose cohort has not demonstrated any progressions at our current 14 month follow up. This same cohort also had a 100% R0 surgical resection rate. One of our patients in the OVATION Study even had a complete pathological response."

The Company expects to initiate enrollment of the Phase I portion of the OVATION II Study in the first half of 2018. The Company expects to have 25% of the study enrolled by the end of 2018. Due to the open label design, clinical data will be disclosed throughout the execution of the trial as it is released by the study’s investigators.

"GEN-1 holds the potential for tremendous promise as a cancer treatment in the rapidly emerging area of immunotherapy. This new trial will evaluate GEN-1’s value as an adjuvant to current standard of care in newly diagnosed Stage III/IV ovarian cancer patients with a relatively healthy immune system. We look forward to initiating the study in the first half of 2018," said Michael H. Tardugno, Celsion’s chairman, president and chief executive officer. "Designed in consultation with leading medical experts, this Phase I/II trial is expected to define an optimal dose, demonstrate GEN-1’s clinical benefit when compared with current standard of care, and provide insights on powering for a registration program as the candidate progresses through development."

About GEN-1 Immunotherapy

GEN-1, designed using Celsion’s proprietary TheraPlas platform technology, is an IL-12 DNA plasmid vector encased in a nanoparticle delivery system, which enables cell transfection followed by persistent, local secretion of the IL-12 protein. IL-12 is one of the most active cytokines for the induction of potent anti-cancer immunity acting through the induction of T-lymphocyte and natural killer (NK) cell proliferation. The Company has previously reported positive safety and encouraging Phase I results with GEN-1 given as monotherapy in patients with peritoneally metastasized ovarian cancer, and a Phase Ib trial of GEN-1 in combination with PEGylated doxorubicin in patients with platinum-resistant ovarian cancer.

On January 4, 2018 Ignyta, Inc. (Nasdaq: RXDX), a biotechnology company focused on precision medicine in oncology, reported that Jonathan Lim, M.D., its Chairman and Chief Executive Officer, will make a presentation at the 36th Annual J.P. Morgan Healthcare Conference on Tuesday, January 9, 2018, at 9:00 a.m. Pacific time (Press release, Ignyta, JAN 4, 2018, View Source [SID1234522878]). The conference will be held at the Westin St. Francis Hotel in San Francisco.

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A webcast of the presentation will be available during the presentation in the Investors section of the company’s website at View Source, and will be archived and available at that site for 14 days.