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Jennifer K Lee et al.
Arthritis research & therapy, 17, 28-28 (2015-04-18)
The aim of this study was to investigate the effects of thyroid hormones tri-iodothyronine (T3), thyroxine (T4), and parathyroid hormone (PTH) from the parathyroid glands, known to regulate the developing limb and growth plate, on articular cartilage tissue regeneration using
D T Schermer et al.
Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research, 9(7), 1041-1046 (1994-07-01)
The biologic activities of human parathyroid hormone-related protein [hPTHrP(1-34] and bovine PTH [bPTH(1-34)] are remarkably similar despite marked sequence divergence in their primary binding domain, residues 25-34. Chicken PTHrP (cPTHrP) is identical to hPTHrP through residue 21. However, in the
D Goltzman et al.
The Journal of biological chemistry, 250(8), 3199-3203 (1975-04-25)
Two synthetic analogues of bovine parathyroid hormone (PTH) with NH2-terminal modifications, PTH-(3-34) and [desamino-Ala-1]PTH-(1-34), were found to lack agonist activity but to demonstrate antagonist properties when tested in the rat renal cortical adenylyl cyclase assay in vitro against the native
G Klaus et al.
Endocrinology, 135(4), 1307-1315 (1994-10-01)
We investigated possible interaction of 1,25-dihydroxyvitamin D3 [1,25-(OH)2D3] and PTH on: 1) proliferation (monolayer culture) and colony formation (agarose stabilized suspension cultures); 2) expression of 1,25-(OH)2D3 receptor (VDR); and 3) cAMP response to PTH, using primary cultures of chondrocytes from
Kun Wang et al.
Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research, 34(6), 979-995 (2019-03-19)
Osteocytes, the most abundant cells in bone, were once thought to be inactive, but are now known to have multifunctional roles in bone, including in mechanotransduction, regulation of osteoblast and osteoclast function and phosphate homeostasis. Because osteocytes are embedded in
A Rybczyńska et al.
Journal of physiology and pharmacology : an official journal of the Polish Physiological Society, 51(2), 303-314 (2000-07-18)
Studies in respiratory alkalotic or short-term phosphate deprived rats raised the possibility that in straight portion of proximal tubules (PST) cAMP might be not a mediator of PTH in inhibition of phosphate reabsorption. The present experiments directly compared the sensitivity
Z Schwartz et al.
Bone, 21(3), 249-259 (1997-09-01)
The aims of this study were to clarify the role of cell maturation stage on chondrocyte response to parathyroid hormone (PTH) by examining the effect of PTH(1-34) on alkaline-phosphatase-specific activity (ALPase) of chondrocyte cultures at two distinct stages of maturation
A E Adams et al.
Bone, 24(4), 305-313 (1999-04-30)
Parathyroid hormone (PTH) is a potent stimulator of osteoblastic cell function in vitro and bone resorption and formation in vivo; however, the details of the molecular mechanism(s) responsible for PTH action and the regulation of gene expression in response to
J Green et al.
The American journal of physiology, 263(6 Pt 1), E1070-E1076 (1992-12-01)
Cytosolic free calcium ([Ca2+]i) is an important regulator of bone cell physiology. We studied the interaction of vitamin D metabolites on the hormonal-activated Ca message system in the osteoblastic cell line UMR-106. The acute rise in [Ca2+]i induced by different
Masaru Shimizu et al.
Biochemistry, 41(44), 13224-13233 (2002-10-31)
Recent data suggest that the binding of parathyroid hormone (PTH)-(1-34) to the PTH-1 receptor (P1R) involves a high-affinity interaction between the C-terminal (15-34) domain of the ligand and the amino-terminal extracellular (N) domain of the receptor and a low-affinity interaction
Naoto Shimizu et al.
Biochemistry, 42(8), 2282-2290 (2003-02-26)
The N-terminal domain of PTH(1-34) is critical for PTH-1 receptor (P1R) activation and has been postulated to be alpha-helical when bound to the receptor. We investigated the possibility that the side chains of residues 6 (Gln) and 10 (Gln or
R Wang et al.
Life sciences, 52(9), 793-801 (1993-01-01)
Single smooth muscle cells from rat tail artery and ventricular myocytes from neonatal rat were isolated by repeated enzyme digestion. The change in cell area as determined photographically was used as an index of cell contraction. The photographic areas of
Erik Kern Harrington et al.
Anatomical record (Hoboken, N.J. : 2007), 293(2), 225-234 (2009-12-04)
Type X collagen (Col-X) deposition is a marker of terminal differentiation during chondrogenesis, in addition to appositional growth and apoptosis. The parathyroid hormone/parathyroid hormone related peptide (PTH/PTHrP) receptor, or PPR, is a G-Protein coupled receptor (GPCR), which activates several downstream
S Tetradis et al.
Endocrinology, 138(9), 3594-3600 (1997-09-01)
PTH increased PG synthase-2 transcription in osteoblastic MC3T3-E1 cells at 30 min, as assessed by nuclear run-on assays. To determine the signaling pathways used by PTH, the activity of a construct containing the PG synthase-2 gene between nucleotides -963 and
Jürgen Weisser et al.
Experimental cell research, 279(1), 1-13 (2002-09-06)
Differentiation and growth of chondrocytes in fetal growth plates of vertebrate long bones and ribs appear to occur in a gradual, continuous manner between the resting zone through the proliferation zone, maturation zone, and upper and lower hypertrophic zones, with
L G Rochelle et al.
Canadian journal of physiology and pharmacology, 71(7), 491-496 (1993-07-01)
Primary cultures of rabbit cortical collecting duct (CCD) cells demonstrated accumulation of Ca at the basolateral (BL) side when cultured on either impermeable or permeable supports. Cell monolayers cultured on impermeable plastic surfaces absorbed Ca with such avidity that hydroxyapatite
E Zoidis et al.
Molecular and cellular biochemistry, 348(1-2), 33-42 (2010-11-16)
Insulin and parathyroid hormone (PTH) regulate glucose metabolism in bone cells. In order to differentiate between the effects of these hormones and to compare the potency of insulin with that of insulin-like growth factor (IGF) I, we treated rat bone-derived
A Mbuyi-Kalala et al.
Methods and findings in experimental and clinical pharmacology, 18(2), 87-99 (1996-03-01)
One of the basic assumptions underlying the use of radioimmunoassay and other competitive protein-binding assays is the homogeneity of the antigen or ligand. This assumption is not valid for the measurement of parathormone (PTH) because of the presence of fragments.
Yiqi Yang et al.
Biofabrication, 12(4), 045013-045013 (2020-07-02)
Osteocytes, essential regulators of bone homeostasis, are embedded in the mineralized bone matrix. Given the spatial arrangement of osteocytes, bioprinting represents an ideal method to biofabricate a 3D osteocyte network with a suitable surrounding matrix similar to native bone tissue.
M Francis et al.
General and comparative endocrinology, 133(2), 243-251 (2003-08-21)
Parathyroid hormone (PTH) and PTH-related peptides (PTHrP) have previously been shown to modulate the contractile state of numerous types of smooth muscle. The effects of N-terminal PTH and PTHrP on spontaneous in vitro contractility of oviducal smooth muscle using tissues
Renal control of calcium, phosphate, and magnesium homeostasis.
Blaine J
Clinical journal of the American Society of Nephrology : CJASN (2015)
R M O'Donovan et al.
The Biochemical journal, 293 ( Pt 2), 377-380 (1993-07-15)
The development of satisfactory cell culture models for the study of parathyroid hormone (PTH)-induced inhibition of Pi transport has proven difficult. Using subcellular fractionation techniques we investigated the response of primary cultures of rat proximal tubular cells to PTH-(1-34). Specific
A T Singh et al.
Endocrinology, 140(1), 131-137 (1999-01-14)
Studies were performed to determine the effects of PTH and related compounds on phosphatidylcholine (PC) hydrolysis in UMR-106 cells and the pathway by which the PTH effects occurred. The responses were compared with those of phorbol 12,13-dibutyrate (PDBu). Both bovine
An in vitro model for studying oral bone loss.
J E Parkhill et al.
Northwestern dental research, 6(2), 17-20 (1996-04-01)
C C Pilbeam et al.
Bone, 14(5), 717-720 (1993-09-01)
Parathyroid hormone-related peptide (PTHrP) has been shown to be the pathogenic agent in humoral hypercalcemia of malignancy (HHM), but the molecular forms that are secreted have not been fully characterized. PTHrP 1-34 has effects similar to parathyroid hormone (PTH), but
A E Adams et al.
Molecular endocrinology (Baltimore, Md.), 12(11), 1673-1683 (1998-11-17)
PTH maintains blood calcium concentrations within the physiological range by acting on a G protein-coupled heptahelical receptor (PTH1 Rc) located primarily in cells in bone and kidney. We have undertaken a photoaffinity cross-linking approach to elucidate the nature of the
Evangelos Zoidis et al.
Endocrine, 41(3), 501-511 (2012-01-20)
Thyroid hormones increase energy expenditure and bone turnover in vivo. To study whether 3,3',5-triiodo-l-thyronine (T₃) stimulates the uptake of glucose in osteoblastic cells, PyMS (a cell line derived from rat bone) cells were kept in serum-free culture medium and treated
M Giossi et al.
Calcified tissue international, 58(6), 419-422 (1996-06-01)
Ipriflavone is an isoflavone derivative used in the prevention and treatment of postmenopausal and senile osteoporosis in humans. To assess the potential contribution of the main in vivo ipriflavone metabolites (M1, M2, M3, and M5) on the pharmacological properties of
G Passeri et al.
Bone and mineral, 24(2), 109-126 (1994-02-01)
We have previously shown that tumor necrosis factor (TNF) and interleukin-1 (IL-1) acted synergistically to stimulate the production of IL-6 by bone marrow stromal and osteoblastic cells; and that an antibody to IL-6 inhibited TNF-induced osteoclast development in murine calvarial
R Torres et al.
Mineral and electrolyte metabolism, 19(2), 64-70 (1993-01-01)
In the last years, a parathyroid hormone (PTH)-related peptide (PTHrP) has been isolated from tumors associated with humoral hypercalcemia with malignancy (HHM). In the present work, we studied the effect of bovine PTH (bPTH)(1-34) and PTHrP(1-34) on tartrate-resistant acid phosphatase
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