18.02.2013 - European researchers have shown that depletion of immunosuppressant T lymphocytes boosts hypercholersterolemia and atherosclerosis in mice.
The findings lay the foundation for cell-based therapies against the fatal disease. Until now, several studies had supported the assumption that FoxP3-positive CD4+CD25+ T cells block the inflammatory processes that lead to the formation of atherosclerotic plaques in the blood vessels, which can cause cardiac infarction and stroke. But the team under Göran Hansson from Swedish Karolinska Institute was the first to demonstrate the effect in genetically engineered DEREG mice. Those mice express the diphteria toxin (DT) under control of a Treg-specific FoxP3 promotor.
Lethally irradiated, atherosclerosis-prone, low-density lipoprotein receptor–deficient (Ldlr–/–) mice received DEREG bone marrow and were injected with DT to eliminate FOXP3+ Tregs. The depletion caused a 2.1-fold increase in atherosclerosis without a concomitant increase in vascular inflammation. The mice also exhibited a 1.7-fold increase in plasma cholesterol and an atherogenic lipoprotein profile with increased levels of VLDL. Clearance of VLDL and chylomicron remnants was hampered, leading to accumulation of cholesterol-rich particles in the circulation. Functional and protein analyses complemented by gene expression array identified reduced protein expression of sortilin-1 in liver and increased plasma enzyme activity of lipoprotein lipase, hepatic lipase, and phospholipid transfer protein as mediators of the altered lipid phenotype. The results prove that FOXP3+ Tregs block atherosclerosis by modulating lipoprotein metabolism.
The findings are good news for drug developers, as Milan-based researchers have recently demonstrated that it is feasible to isolate functional Tregs and expand them in vitro. The patent has already been licenced to German T-cell Europe, which will use the technology for inducing immune tolerance after organ transplantation.
20.07.2016 Belgian molecular diagnostics company Biocartis Group NV has raised €55m and will use the funds mainly to expand manufacturing capacities for its PCR-based molecular diagnostics system Idylla.
19.07.2016 It is Europe’s first gene therapy company to float on Euronext: Gensight raised €40m in its IPO. And it is not the only French company that has taken the leap in an uncertain market climate – Alzheimer’s expert Pharnext also went public.
18.07.2016 When NASA blasted off to the International Space Station on Monday morning, it had UK tech on board. A miniature DNA sequencer from Oxford Nanopore will be used to keep an eye on the ISS atmosphere – and may even analyse alien DNA one day.
13.07.2016 Cell Medica has acquired Swiss antibody specialist Delenex Therapeutics. The deal nets the British cellular therapeutics developer Delenex’ proprietory antibody fragment platform Pentrabody.
12.07.2016 Vienna-based vaccine specialist Themis Bioscience GmbH has secured broad access to a promising virus vaccine vector tech by extending its license agreement with French Institut Pasteur. Its goal: to develop a Zika vaccine.
07.07.2016 Californian biopharma Medivation has agreed to confidential negotiations with its suitors, in particular the French pharmaceutical company Sanofi, which aggressively has buffeted the cancer therapy specialist for months.
06.07.2016 The European Commission started an investigation into Illumina’s and Sequenom’s 2014 patent agreement, UK-competitor Premaitha Health said. The two US companies had agreed to pool their Noninvasive Prenatal Testing IP.
04.07.2016 Cinfa Biotech is shuffling for position on the lucrative biosimilar market. The Spanish-German company has published positive results in a study for a pegfilgrastim copycat with 172 healthy volunteers in Germany.
30.06.2016 UK’s Heptares Therapeutics and Paul Scherrer Institute spinoff leadXpro will collaborate to find new approaches for the determination of high-res X-ray structures of G protein-coupled receptors to find new drugs.
JANUS® G3 Automation Workstations deliver real-time and future adaptability in throughput, capacity, and dynamic volume range from 0.5 μl to 5000 μl for consistent and reproducible sample preparation more