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A breakdown product of bone collagen, excreted in urine, and assayed as a measure of osteoclast activity; increased in disease states such as Paget disease, primary hyperparathyroidism, and postmenopausal osteoporosis.


A breakdown product of bone collagen, excreted in urine, and assayed as a measure of osteoclast activity; increased in disease states (e.g., Paget disease, primary hyperparathyroidism, osteoporosis).
References in periodicals archive ?
When pH is increased, a collapsed conformation forms due to deprotonation of the charged pyridinium segments.
Coffee also contains pyridinium, which helps prevent excessive blood clotting.
Cationic head groups include imidazolium, pyridinium, pyrrolidinium, morpholinium, piperidium, quinolinium, quaternary ammonium, and quaternary phosphonium moieties; anionic head groups include tetrafluoroborate (B[F.
delta-9-tetrahydrocannabinolic acid (THCA), delta-9-tetrahydrocannabinol (THC) and cannabidiol (CBD) in mice mesencephalic cultures for their protective capacities against 1-methyl-4-phenyl pyridinium ([MPP.
In a study, (68) when the T4 dose was reduced in postmenopausal women with low initial low serum TSH, BMD increased at the lumbar spine and femur with simultaneous reduction of serum osteocalcin and urinary excretion of bone-collagen derived pyridinium cross-links.
The treatment used cetyl pyridinium chloride (CPC), which has been used safely in mouthwashes for more than 60 years.
Reactivity of ionic liquids with kaolinite: Melt intersalation of ethyl pyridinium chloride in an urea-kaolinite pre-intercalate, J.
Concentrations of leptin, bone alkaline phosphatase (BAP), OCN, and pyridinium (PYD) were measured in samples that had been subjected to only one freeze-thaw cycle.
It is comprised of a cationic polymer comprising cationic protonated amine or quaternary' ammonium functionalities comprising dialkylaminoalkyl acrylates, dialkylaminoalkyl methacrylates, monoalkylaminoalkyl acrylates, monoalkylamino alkyl methacrylates, trialkyl methacryloxyalkyl ammonium sails, trialkyl acryloxyalkyl ammonium salts, diallyl quaternary ammonium salts, pyridinium moeities, imidazolium moeities, quaternized pyrrolidone moeities, and mixture thereof; an encapsulated anionic colorant selected from the group consisting of FD&C Yellow 5, D&CYellow 10, D&C Red 33, D&C Green 5, D&CYellow 8, D&C Red 28, and mixtures thereof; and an aqueous carrier; wherein the cationic polymer forms a coacervate with the encapsulated anionic colorant.
Intramolecular cyclization was achieved through the reaction of the isoxazole ring with pyridinium tribromide.
Effect of menopause and hormone replacement therapy on the urinary excretion of pyridinium crosslinks.