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INTRODUCTION Sarcopenia is considered to be an enormous burden for both the individuals affected and for society at large. A multifactorial aetiology of this geriatric syndrome has been discussed. Amongst other pathomechanisms, the degeneration of the neuromuscular junction (NMJ) may be of major relevance. The intact balance between the pro-synaptic agent(More)
OBJECTIVES C-terminal Agrin Fragment (CAF) has been proposed as a potential circulating biomarker for predicting changes in physical function among older adults. To determine the effect of a one-year PA intervention on changes in CAF concentrations and to evaluate baseline and longitudinal associations between CAF concentrations and indices of physical(More)
AIMS Skeletal muscle wasting affects 20% of patients with chronic heart failure and has serious implications for their activities of daily living. Assessment of muscle wasting is technically challenging. C-terminal agrin-fragment (CAF), a breakdown product of the synaptically located protein agrin, has shown early promise as biomarker of muscle wasting. We(More)
1. Gerontopole Toulouse, Department of Geriatric Medicine, Toulouse University Hospital, Toulouse France, INSERM 1027; 2. Vice President, Clinical Research & Operations, Neuroscience & Neuromuscular Disorders, Cytokinetics, Inc. 280 East Grand Avenue, South San Francisco, CA 94080, USA; 3. Neurotune AG, Wagistr. 27A, 8952 Schlieren, Switzerland; 4. Senior(More)
Sarcopenia is a recently defined medical condition described as age-associated loss of skeletal muscle mass and function. Recently, a transgenic mouse model was described linking dispersal of the neuromuscular junction caused by elevated agrin degradation to the rapid onset of sarcopenia. These mice show a significant elevation of serum levels of a(More)
Oxaloacetate decarboxylase is a membrane-bound multiprotein complex that couples oxaloacetate decarboxylation to sodium ion transport across the membrane. The initial reaction catalyzed by this enzyme machinery is the carboxyl transfer from oxaloacetate to the prosthetic biotin group. The crystal structure of the carboxyltransferase at 1.7 A resolution(More)
BACKGROUND The C-terminal agrin fragment (CAF) is a cleavage product of agrin, the major proteoglycan of the glomerular basement membrane. This article studies if CAF could serve as a biomarker for renal function in renal transplant recipients. MATERIAL AND METHODS We measured serum CAF and creatinine concentrations and calculated estimated glomerular(More)
BACKGROUND C-terminal agrin fragment (CAF, size 22 kDa) is a promising new biomarker for kidney function. This study evaluated the usefulness of CAF as a serum biomarker for residual renal function (RRF) in patients undergoing automated peritoneal dialysis (APD). PATIENTS AND METHODS Serum, urine and dialysate samples were obtained in 12 end-stage renal(More)
BACKGROUND Oxaloacetate decarboxylase (OAD) is a member of the Na(+) transport decarboxylase enzyme family found exclusively in anaerobic bacteria. OAD of Vibrio cholerae catalyses a key step in citrate fermentation, converting the chemical energy of the decarboxylation reaction into an electrochemical gradient of Na(+) ions across the membrane, which(More)
The oxaloacetate decarboxylase Na+ pumps OAD-1 and OAD-2 of Vibrio cholerae are composed of a peripheral alpha-subunit associated with two integral membrane-bound subunits (beta and gamma). The alpha-subunit contains the carboxyltransferase domain in its N-terminal portion and the biotin-binding domain in its C-terminal portion. The gamma-subunit plays a(More)