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Nerve growth factor (NGF) is a member of an expanding family of neurotrophic factors (including brain-derived neurotrophic factor and the neurotrophins) that control the development and survival of certain neuronal populations both in the peripheral and in the central nervous systems. Its biological effects are mediated by a high-affinity ligand-receptor(More)
Asymmetric dimethylarginine (ADMA) and monomethyl arginine (L-NMMA) are endogenously produced amino acids that inhibit all three isoforms of nitric oxide synthase (NOS). ADMA accumulates in various disease states, including renal failure, diabetes and pulmonary hypertension, and its concentration in plasma is strongly predictive of premature cardiovascular(More)
OBJECTIVE To investigate the significance of PINK1 mutations in sporadic Parkinson's disease (PD). METHODS We determined the frequency of PINK1 mutations by direct sequencing in a large series of PD patients with apparently sporadic disease (n = 768). RESULTS Twelve heterozygous mutations were identified, nine in PD patients and three in control(More)
The RET proto-oncogene encodes a receptor tyrosine kinase for the glial cell line-derived neurotrophic factor family of ligands. Loss-of-function mutations in RET are implicated in Hirschsprung disease, whereas activating mutations in RET are found in human cancers, including familial medullar thyroid carcinoma and multiple endocrine neoplasias 2A and 2B.(More)
BACKGROUND Sister chromatid separation and segregation at anaphase onset are triggered by cleavage of the chromosomal cohesin complex by the protease separase. Separase is regulated by its binding partner securin in two ways: securin is required to support separase activity in anaphase; and, at the same time, securin must be destroyed via ubiquitylation(More)
Serum response factor transcriptional activity is controlled through interactions with regulatory cofactors such as the coactivator MAL/MRTF-A (myocardin-related transcription factor A). MAL is itself regulated in vivo by changes in cellular actin dynamics, which alter its interaction with G-actin. The G-actin-sensing mechanism of MAL/MRTF-A resides in its(More)
The neurotrophins mediate their effects through binding to two classes of receptors, a tyrosine kinase receptor, member of the Trk family, and the low-affinity neurotrophin receptor, p75LNGFR, of as yet undefined signalling capacity. The need for a two-component receptor system in neurotrophin signalling is still not understood. Using site-directed(More)
Five decades of research on NGF have led to the discovery of a small family of evolutionarily conserved proteins, which have vital functions in the survival and neuronal development of specific neuronal populations. The generation of mice lacking neurotrophin expression has recapitulated classic experiments using anti-NGF antibodies to dissect the(More)
Signaling through G proteins normally involves conformational switching between GTP- and GDP-bound states. Several Rho GTPases are also regulated by RhoGDI binding and sequestering in the cytosol. Rnd proteins are atypical constitutively GTP-bound Rho proteins, whose regulation remains elusive. Here, we report a high-affinity 14-3-3-binding site at the C(More)