Publications by authors named "E Magnenat"

Measles is a disease that was considered as relegated to medical history, since an extremely efficient vaccine had been developed. However, in Switzerland and elsewhere there has been an increasing number of epidemics in the past years, and the highest number of new cases this year. Based on two clinical cases showing very different outcomes, we discuss the disease, its clinic, complications, management, and the challenges remaining in obtaining a sufficient vaccination coverage worldwide as well as in our country.

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Background: The resistance of melanoma cells to cisplatin restricts its clinical use. Therefore, the search for novel tumor inhibitors and effective combination treatments that sensitize tumor cells to this drug are still needed. We purified macrovipecetin, a novel heterodimeric C-type lectin, from Macrovipera lebetina snake venom and investigated its anti-tumoral effect on its own or combined with cisplatin, in human melanoma cells.

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In order to fully understand biological processes it is essential to identify interactions in protein complexes. There are several techniques available to study this type of interactions, such as yeast two-hybrid screens, affinity chromatography, and coimmunoprecipitation. We propose a novel strategy to identify protein-protein interactions, comprised of first detecting the interactions using ProteinChips and SELDI-TOF MS, followed by the isolation of the interacting proteins through affinity beads and RP-HPLC and finally identifying the proteins using nano-LC MS/MS.

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Background: Drosophila larvae possess only 21 odorant-receptor neurons (ORNs), whereas adults have 1,300. Does this suggest that the larval olfactory system is built according to a different design than its adult counterpart, or is it just a miniature version thereof?

Results: By genetically labeling single neurons with FLP-out and MARCM techniques, we analyze the connectivity of the larval olfactory circuit. We show that each of the 21 ORNs is unique and projects to one of 21 morphologically identifiable antennal-lobe glomeruli.

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Article Synopsis
  • Ophioluxin, a strong platelet activator extracted from King cobra venom, has a molecular mass of 85 kDa under nonreducing conditions and breaks down into two subunits of 16 and 17 kDa upon reduction, with N-terminal sequences similar to convulxin.
  • Ophioluxin is 2-4 times more effective than convulxin in inducing platelet aggregation and causes similar increases in calcium levels, although it doesn’t agglutinate fixed platelets even at high concentrations.
  • It is the first convulxin-like C-type lectin identified in the Elapidae snake family and has unique properties that differentiate it from other C-type lectins like echicetin.
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