CD146 (MUC-18, MCAM) expression on cancer cells correlates with cancer progression and a bad prognosis in several tumors, including melanoma and pancreatic tumors. Deciphering the mechanism mediating the CD146 role in cancer is essential for generating new therapeutic strategies. We found that CD146 expression in cancer cells is associated with a secretion of soluble CD146 (sCD146) that constitutes an active player in tumor development. Indeed, sCD146 induces the overexpression of its binding protein, angiomotin, on both endothelial and cancer cells and promotes both paracrine effects on angiogenesis and autocrine effects on cancer cells proliferation and survival. These last effects are mediated in part through the induction and phosphorylation of c-myc in cancer cells. In mice models xenografted with human CD146-positive melanoma or pancreatic cancer cells, administration of a novel monoclonal antibody specifically targeting sCD146, but not its membrane form, successfully suppresses tumor vascularization and growth. Our findings demonstrate that sCD146 secreted by CD146-positive tumors mediates important pro-angiogenic and pro-tumoral effects. Targeting sCD146 with a novel neutralizing antibody could thus constitute an innovative therapeutic strategy for the treatment of CD146-positive tumors.Oncogene advance online publication, 11 April 2016; doi:10.1038/onc.2016.83.

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On April 12, 2016 Celsion Corporation (NASDAQ: CLSN), an oncology drug development company, reported that data highlighting the potential of GEN-1 in ovarian cancer will be presented at the upcoming American Association for Cancer Research (AACR) (Free AACR Whitepaper) Annual Meeting, which is being held in New Orleans from April 16-20, 2016 (Press release, Celsion, APR 12, 2016, View Source [SID:1234510703]). GEN-1 is an IL-12 DNA plasmid vector formulated into a nanoparticle with a non-viral delivery system to cause the sustained local production and secretion of the Interleukin-12 (IL-12) protein loco-regionally to the tumor site.

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The poster presentation relates to data demonstrating the significant synergistic anti-cancer effects of GEN-1 in combination with Avastin and Doxil, as well as promising safety and efficacy clinical data for GEN-1 in combination with Doxil in platinum-resistant ovarian cancer patients.

Details of the presentation are as follows:

Abstract Title: Interleukin-12 Gene Therapy in Combination with Bevacizumab and PEGylated Liposomal Doxorubin for Treatment of Disseminated Ovarian Cancer

Session Title: Drug Delivery

Date and Time: April 18, 2016 from 1:00 – 5:00 pm

"GEN-1 has consistently shown improved outcomes in both pre-clinical and clinical studies when combined with standard of care therapeutics," said Michael H. Tardugno, Celsion’s chaiman, president and CEO. "The remarkable findings from this study further reinforce our development strategy for GEN-1 and accelerate our plans for clinical trials in ovarian cancer patients who have had limited success with first line treatments."

The Company is currently enrolling patients in the OVATION Study, a Phase 1b dose escalating trial combining GEN-1 with neo-adjuvant therapies in newly diagnosed ovarian cancer patients which will provide a starting dose for a follow-on Phase 1/2 study combining GEN-1 with Avastin and Doxil. The Phase 1/2 combination trial is expected to begin in the second half of 2016.

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 recently completed a Phase Ib trial of GEN-1 in combination with PEGylated doxorubicin in patients with platinum-resistant ovarian cancer. GEN-1 has also demonstrated preclinical activity in glioblastoma multiforme (brain cancer) and the Company plans to initiate a Phase I study in this indication in the second half of 2015.

Recent studies have shown that inoculation of susceptible mice with amyloid-β (Aβ) peptides accelerates Aβ deposition in the brain, supporting the idea that Aβ may be self-amplifying; however, the exact mechanism is not understood. Here we provide evidence that Aβ may self-amplify, in part, by inhibiting α-secretase ADAM10 (a disintegrin and metalloprotease) cleavage of full-length Aβ precursor protein (FL AβPP) and therefore allow greater β-secretase processing, and that Aβ itself is a substrate for ADAM10. Exposure of primary neuronal cultures from PDAβPP mice to exogenous rat Aβ 1 – 40 resulted in increased de novo human Aβ 1 – 42 production and exposure of cells to Aβ decreased production of ADAM10 cleavage product soluble AβPPα (sAβPPα). In a cell-free assay, Aβ decreased ADAM10 cleavage of the chimeric substrate MBP-AβPPC125 and Aβ itself was apparently cleaved by the enzyme. The axonal guidance and trophic factor netrin-1, however, reduced the Aβ 1 – 40-induced Aβ 1 – 42 increase, increased sAβPPα, and reversed the Aβ-induced sAβPPα decrease in vitro. In vivo, induction of netrin-1 expression in PDAβPPSwe/Ind transgenic mice resulted in reductions in both Aβ 1 – 42 and Aβ 1 – 40, and ICV delivery of netrin-1 to PDAβPPSwe/Ind mice increased sAβPPα, decreased Aβ, and improved working memory. Finally, to support further study of netrin-1’s potential as a therapeutic for Alzheimer’s disease, pilot gene therapy studies were performed and a netrin mimetic peptide synthesized and tested that, like netrin, can increase sAβPPα and decrease Aβ 1 – 42in vitro. Taken together, these data provide mechanistic insights into Aβ self-amplification and the ability of netrin-1 to disrupt it.

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On April 12, 2016 Clovis Oncology, Inc. (NASDAQ: CLVS) reported that NASDAQ has halted trading of the Company’s common stock (Press release, Clovis Oncology, APR 12, 2016, View Source;p=RssLanding&cat=news&id=2156231 [SID:1234510704]). The U.S. Food and Drug Administration’s (FDA) Oncologic Drugs Advisory Committee (ODAC) is meeting this morning to discuss the company’s New Drug Application (NDA) for rociletinib for the treatment of patients with mutant epidermal growth factor receptor (EGFR) non-small cell lung cancer (NSCLC) who have been previously treated with an EGFR-targeted therapy and have the EGFR T790M mutation.

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About Rociletinib
Rociletinib is the company’s novel, oral, targeted covalent (irreversible) mutant-selective inhibitor of EGFR in development for the treatment of NSCLC in patients with initial activating EGFR mutations, as well as the dominant resistance mutation T790M. Data from both the pivotal, single-arm TIGER-X and TIGER-2 clinical trials served as the basis for the U.S. and EU regulatory submissions for the treatment of advanced mutant EGFR T790M-positive lung cancer. Rociletinib was granted Breakthrough Therapy designation by the FDA in May 2014.

Multiple myeloma (MM) is characterized by an uninhibited, clonal growth of plasma cells. While first-degree relatives of patients with MM show an increased risk of MM, the genetic basis of inherited MM susceptibility is incompletely understood. Here we report a genome-wide association study in the Nordic region identifying a novel MM risk locus at ELL2 (rs56219066T; odds ratio (OR)=1.25; P=9.6 × 10(-10)). This gene encodes a stoichiometrically limiting component of the super-elongation complex that drives secretory-specific immunoglobulin mRNA production and transcriptional regulation in plasma cells. We find that the MM risk allele harbours a Thr298Ala missense variant in an ELL2 domain required for transcription elongation. Consistent with a hypomorphic effect, we find that the MM risk allele also associates with reduced levels of immunoglobulin A (IgA) and G (IgG) in healthy subjects (P=8.6 × 10(-9) and P=6.4 × 10(-3), respectively) and, potentially, with an increased risk of bacterial meningitis (OR=1.30; P=0.0024).

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Early/Late Stage Pipeline Development - Target Scouting - Clinical Biomarkers - Indication Selection & Expansion - BD&L Contacts - Conference Reports - Combinatorial Drug Settings - Companion Diagnostics - Drug Repositioning - First-in-class Analysis - Competitive Analysis - Deals & Licensing

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