News

Innovation Radar: Probiodrug’s Nature Paper Receives Broad Coverage

This week’s Nature publication by researchers of Probiodrug AG and the University of Virginia has received broad coverage in the international media. In Germany and Austria, it made major news in TV (ARD, MDR, ORF) and radio stations (dlf, MDR, dradio), while in the US Rudy Tanzi, neurogeneticist of Harvard Medical School and an advisor on the Alzheimer problem to US-President Barack Obama, was quoted in ScienceNews as saying: “This opens up a whole new view of the disease.”

Alzheimer researcher Thomas Bayer, Professor of Molecular Psychiatry  at the University of Goettingen added in MDR INFO that the publication was “a very important contribution”, demonstrating that very small amounts of pGlu Abeta were able to drag normal Abeta peptides along into the deadly cascade and that tau protein was essential for the toxic function.

As an example, further reports appeared in Der Standard (Austria) and La Stampa (Italy).

Company News: Jean-Paul Prieels joins VAXIMM’s Board of Directors

VAXIMM AG, a Swiss-German biotech spin-off from Merck KGaA focusing on cancer vaccines, announced today the appointment of Jean-Paul Prieels as a new member of its Board of Directors.

Dr. Prieels is a renowned industry expert in the vaccine field. He held various executive positions at GlaxoSmithKline, where he headed the vaccine research and development in Rixensart, Belgium, among others. Dr. Prieels, who joined GlaxoSmithKline Biologicals (formerly SmithKline Beecham Biologicals) in 1987, has been instrumental in developing several marketed vaccines, including cervical cancer vaccine Cervarix™, Rotarix™ to protect from rotavirus infection, and Synflorix™ for the prevention of pneumococcal infections. He retired from GSK as Senior Vice President Research and Development in early 2011 and is currently a board member of several biotech companies in the vaccine field.

VAXIMM’s lead product candidate VXM01 is being evaluated in a placebo-controlled phase I dose escalation study enrolling up to 45 pancreatic cancer patients, with results expected in H1, 2013.

Company News: Nanobiotix and Thomas Jefferson University Start Research Collaboration

– Nanomedicine and Medical Education leaders are joining their forces in the United States to accelerate the development of NanoXray –

Nanobiotix, a company developing novel cancer nanotherapeutics and Thomas Jefferson University, one of Philadelphia’s premier medical and health sciences universities, today announced that they have entered into a research collaboration to accelerate the development of Nanobiotix’ lead compound NBTXR3 in the US.

Under the terms of the collaboration agreement, Nanobiotix will fund a 2-year preclinical research program, which will be directed by Bo Lu, MD, Professor in the Department of Radiation Oncology at Jefferson and Director of the department’s Division of Molecular Radiation Biology. The goal of the program is to study the therapeutic efficacy of NBTXR3, the lead product of Nanobiotix´ NanoXray pipeline.

NBTXR3, a nanoparticle consisting of hafnium oxide crystals, aims to enhance the local destruction of the tumor mass during radiotherapy. It accumulates in the cancer cells and, upon radiation, emits huge amounts of electrons leading to the formation of free radicals. These, in turn, damage the cancer cells and cause their targeted destruction. As a result, the destructive power of standard radiation therapy is locally and selectively enhanced within the tumor cells.

NBTXR3 has been classified in the EU as class III medical device and is currently being tested in a European Phase I trial to establish feasibility and safety of NBTXR3 in patients with soft tissue sarcoma. Preliminary data are expected by the end of 2012. Further clinical trials are in preparation in Europe and in the US, where NBTXR3 is classified as a drug.

Company News: Probiodrug AG, Collaborators Explain Interplay of Key Suspects in Alzheimer’s Disease

Nature paper demonstrates that toxicity in AD is induced by pyroglutamate Abeta and is tau protein dependent

Pyroglutamate Ab (“pyroglu Ab”) a predominant, highly toxic fraction of Aβ found in the brains of Alzheimer’s disease patients, triggers the formation of toxic oligomers exhibiting prion-like behavior and initiating neurotoxicity via a tau protein-dependent pathway, thereby explaining the crucial role of such modified Aβ in the onset and spread of neuronal toxicity in Alzheimer’s Disease.

HALLE/SAALE, Germany, May 2, 2012 – Probiodrug AG (Probiodrug), a biotech company developing products for the treatment of neurodegenerative and inflammatory diseases with a particular focus on Alzheimer’s disease (AD), today announced its scientists and academics collaborators published seminal findings on the role of pyroglu Aβ in AD pathology in the May 2, 2012 online edition of the journal Nature (DOI: 10.1038/nature11060). The new findings add to the growing body of evidence that pyroglu Aβ plays a crucial role in the initiation of AD. In addition, the research results further elucidate the mechanism by which pyroglu Aβ triggers neuronal toxicity.

The data published today suggest that pyroglu Aβ  co-aggregates with “normal” Ab peptides to form low molecular weight oligomers (LMOs), which are structurally distinct and far more toxic to cultured neurons than oligomers derived from normal Aβ. Moreover, the presence of the neuronal protein tau is essential for toxicity mediated by LMOs that contain pyroglu Aβ.  The results have been substantiated in transgenic mice designed to express increased levels of pyroglu Aβ. In these animals, the pyroglu Aβ-mediated neuronal loss and gliosis was prevented, if tau expression was shut down. The study is supplemented by results published in the Journal of Neurochemistry. Here the Probiodrug researchers reveal, that the aggregation propensity is caused by the hydrophobic nature of pyroglu Aβ.

The scientists also were able to demonstrate that the cytotoxicity is propagated by a prion-like templating mechanism of Ab misfolding initiated by pyroglu Ab: even after strong dilution to a solution containing only 0.000625% pyroglu Ab, the mix after 24h developed enough toxicity to kill 50% of neurons treated with it.

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