Tag: Sascha Karberg

Food for Thought: Weekly Wrap-Up

Sascha Karberg in Frankfurter Allgemeine Sonntagszeitung (FAS) features the latests attempts of biologists to understand and replicate the endosymbiosis of cyanobacteria and cells of eucaryotes that led to the chloroplasts found in all green plants. Already in the 1970s, biologists successfully incorporated cyanobacteria into an amoeba and meanwhile, several animals carrying endosymbionts providing them with extra energy from the sun have been discovered. This is now replicated in the lab. Using genetically engineered cyanobacteria, scientist recently created zebrafish larvae as well as mice and hamster cells with endosymbionts that not only survive but replicate. Karberg also explains why this will not lead to green cows living on sunlight.

Silvia von der Weiden in Die Welt introduces novel findings about the role of water molecules in protecting and maintaining the DNA geometry. Reducing or expanding the size of the water sheath covering the DNA changes the conformation of the molecule as if activating a switch. The findings may be used to create novel DNA-based nanotools or develop DNA-binding drugs to influence gene activation.

In Forbes, Mattew Herper features a graph proving Moore’s law wrong – at least in the decline of cost of DNA sequencing: the cost of getting DNA data (i.e. cost per genome as well as per megabyte of DNA sequence) is dropping way faster than the cost of processing data on computers. In a separate article, Herper endorses Wall Street’s forecast, that Pfizer’s Prevnar 13 vaccine against pneumococcus infections will be the company’s biggest seller in five years.

The Economist features an Italian engineering firm developing a system to collect oil spills in the sea that is based on wool. Already the company has been granted a patent of its containerized, ship-based kit. After absorbing the oil, the wool is pressed to recover the oil and the reused.

Andrew Pollack in the New York Times reports about setbacks in the development of treatments based on stem cells. Experiments recently  showed that induced pluripotent stem cells – which are thought to be superior both ethically and technically to embryonic stem cells – are rejected by the immune system. However, it is not yet clear whether the results obtained in mice hold true for humans, too.

 

Food for Thought: Weekly Wrap-Up

In Forbes, Matthew Herper this week deals with the failure of Bydureon eventide, the once-a-week anti-diabetes shot developed by Eli Lilly and Amylin Pharmaceuticals. In a head-to-head Phase III trial Bydureon was not superior to Victoza, the once-a-day drug by Novo Nordisk, in terms of lowering blood glucose levels. Both are synthetic versions of glucagon-like peptide-1, or GLP-1. In another article, Herper looks at the biotech busts and breakthroughs of Februay, from KV Pharmaceuticals (shares up 400%) to Orexigen (shares down 64%). Herper concludes that the rejection of the Orexigen drug Contrave by FDA – the third rejection of an obesity drug in a row – “killed the obesity drug field.”

Wired this week features a story by John Timmer who describes experiments, in which the introduction of engineered viruses boost memory recall in rats. The improment is brought about by a viral protein kinase, but the exact mechanism ist still not understood.

In Germany, Sascha Karberg in Frankfurter Allgemeine Zeitung (FAZ) revisits the attempts to cure AIDS by removing the gene for the receptor protein CCRS, which serves as the entry door for the AIDS virus, from the T cells of HIV-infected patients . Humans lacking the CCRS gene show natural resistance to the disease. The genetically modified T cells are then reinjected into the patients’ blood stream (see akampioneer, January 17). In a Phase I trial of this approach by Sangamo Biosciences, preliminary results have been encouraging, leading to a significant and durable increase of CD4+ T- cell counts in the patients.

Magnus Heier in Frankfurter Allgemeines Sonntagszeitung (FAS) deals with the ignorance of medical doctors in Germany regarding therapy guidelines and attempts to solve the problem by publishing patient versions of the guidelines in the internet.

Richard Stone in Sueddeutsche Zeitung (SZ) features an epidemic in Bangladesh caused by the Nipah virus, which was discovered only in 1998. The virus is spread by bats via raw palm tree juice, a delicacy for both bats and humans. Christina Berndt, also in SZ,  deals with the replacement of members in Germany’s federal “German Standing Vaccination Committee” (STIKO) responsible for handing out advice on vaccination practices. Berndt claims that some of the newly appointed members are too close to industry because they participate in vaccine studies sponsored by vaccine manufacturers.

In a five-part series, Kai Kupferschmidt in German weekly magazine Die ZEIT deals with synthetic biology, this week introducing companies developing synthetic fuels and novel ways to produce drugs. Surprisingly, the article does not feature a single German synthetic biology company but US companies only.