Marcel Luyten

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Intracellular protein phosphorylation by protein kinase C (PKC) plays a major role in the translation of extracellular signals into cellular events. Speculations on the structural basis for PKC activation are based on sequence homology between their cysteine-rich domains (CRD) and the DNA-binding ‘zinc-fingers’. We produced a fragment comprising the second(More)
The chemokine receptor CCR5 plays an important role in inflammatory and autoimmune disorders as well as in transplant rejection by affecting the trafficking of effector T cells and monocytes to diseased tissues. Antagonists of CCR5 are believed to be of potential therapeutic value for the disorders mentioned above and HIV infection. Here we report on the(More)
Cyclosporin A (Sandimmun) achieves immunosuppressive activity by complex formation with cyclophilin and subsequent binding of the binary complex to and inhibiting protein phosphatase 2B (calcineurin). Complexes of nonimmunosuppressive cyclophilin binding cyclosporin analogues do not inhibit protein phosphatase 2B, suggesting a crucial role for this enzyme(More)
Chemokine receptors have gained attention as potential targets for novel therapeutic strategies. We investigated the mechanisms of allograft rejection in chemokine receptor Cxcr3-deficient mice using a model of acute heart allograft rejection in the strain combination BALB/c to C57BL/6. Allograft survival was minimally prolonged in Cxcr3-deficient mice(More)
Class II major histocompatibility molecules confer disease risk in Celiac disease (CD) by presenting gliadin peptides to CD4 T cells in the small intestine. Deamidation of gliadin peptides by tissue transglutaminase creates immunogenic peptides presented by HLA-DQ2 and DQ8 molecules to activate proinflammatory CD4 T cells. Detecting gliadin specific T cell(More)
Monte Carlo simulations of self-avoiding random walks surrounded by aligned rods on a square lattice and a simple cubic lattice were performed to address the topological constraints involved for dilute solutions of flexible polymers in a highly oriented nematic solvent. The nematic constraint exerted by the solvent is modelled by requiring that the distance(More)
Specific antisense oligonucleotide probes for the alpha isoforms of the catalytic subunit (A-subunit) of calcineurin were prepared and the distribution of A alpha 1 and A alpha 2 mRNA's has been studied in rat brain using in situ hybridization histochemistry. Clear regional differences have been observed for the A alpha 1 and A alpha 2 isoforms. The(More)
Specific antisense oligonucleotide probes for the α isoforms of the catalytic subunit (A-subunit) of calcineurin were prepared and the distribution of Aα 1 and Aα 2 mRNA's has been studied in rat brain using in situ hybridization histochemistry. Clear regional differences have been observed for the Aα 1 and Aα 2 isoforms. The predominant form, Aα 1, was(More)
The MALT1 paracaspase has arginine-directed proteolytic activity. A20 is a dual ubiquitin-editing enzyme involved in termination of NF-κB signaling. Upon T- or B-cell receptor engagement human (h) A20 is cleaved by MALT1 after arginine 439, yielding an N-terminal fragment (hA20p50) and a C-terminal one (hA20p37). The hA20p50 fragment has never been detected(More)