21.06.2012 - Researchers have halted the growth of skin cancer with help of a DNA that acts like an enzyme
Dublin/New South Wales – A DNA-based enzyme can block the growth of two common types of skin cancer, basal cell carcinoma and squamous cell carcinoma, an Australian-Irish team of researchers has demonstrated (Science Translational Medicine, 20 June). Dubbed Dz13, the DNAzyme could potentially be a safe and effective therapy for skin cancer in humans.
In animal models for both skin cancers as well as metastasis, the molecule stopped tumour spread and growth effectively by binding to and destroying the RNA of a key gene called c-Jun. The proliferation–related transcription factor controlled cancer growth by suppression of neovascularisation and increasing apoptosis of tumour cells. Phenotypically, the DNAzyme reduced lung nodule formation and an intratumour injection of 100 µg Dz13 led to complete tumour remission after 35 days.
Levon Khachigian and colleagues, who have filed an US patent on „vascular therapeutics“, also found that Dz13 probably triggers an immune response to inhibit tumour growth because it acts better in immunocompetent than in immunocompromised mice. In GLP-compliant toxicology tests, the researchers proved in monkeys, pigs and rats that Dz13 is safe and well tolerated. It did not interfere in more than 70 physiological relevant bioassays, suggesting a reduced propensity for off-target effects.
The authors suggest to test the compound in first-in-man trails. Up to now DNAzymes have not caught on as therapeutic agents partly due to the fact that delivery has been a challenge for DNAzyme therapeutic applications. Now, the researchers have formulated their c-jun mRNA–targeted DNAzyme in complex with a DOTAP/DOPE–based lipid carrier.
29.07.2015 Newly founded Mereo BioPharma has acquired three mid-stage clinical assets from Novartis. In turn, the Swiss pharma concern will hold a stake in the UK company. Other investors are also on board.
24.07.2015 Biotech companies across Europe continue to raise cash on the public markets, generating €3bn in total financing proceedings in the first half of 2015. Compared to 2014, this is almost twice as much.
23.07.2015 US money keeps flowing into Europe's biotechs. As the race for the peanut allergy market heats up, NASDAQ listed French biotech DBV has announced the successful closing of US$281m (€256m) share offering for its allergy products.
16.07.2015 Sanofi has announced plans to restructure its business in five standalone global business units starting in January 2016. The goal is to promote growth and help the company launch a catalogue of new drugs over the next five years.
15.07.2015 GlaxoSmithKline (GSK) has become the first drugmaker to join the Francis Crick Institute. It is a consortium made up of six scientific and academic institutes to conduct research and drug development in the UK. The new institute is set to become a world-leading centre of biomedical research and innovation.
10.07.2015 Karolinska Development has slashed the reported value of its portfolio by almost half by revising its valuation model for early stage companies and divesting its shares in pain med maker Pharmanest.
The BioShake series contains high-speed mixer and thermal mixer for small and very small volumes in microplates and reaction tubes and allows for the first time high precise and efficient mixing in the microliter scale for a wide range of applications. more