Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts: Gene/Protein Disease Symptom Drug Enzyme Compound   Target Concepts: Gene/Protein Disease Symptom Drug Enzyme Compound

---

Query: EC:3.1.3.1 (alkaline phosphatase)
47,916 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

A significant correlation between the activity of the bone isoenzyme or serum alkaline phosphatase and the urinary hydroxyproline excretion in osteomalacia, osteoporosis, primary hyperparathyroidism with osteodystrophy, Paget's disease, secondary bone tumours, and in a control group was found (P less than 0.001). This close correlation was not observed between these variables in patients with active acromegaly. Diagnosis determined from these indices of formation and turnover of bone matrix agreed with that established by histological and histochemical examination of bone, by X-ray investigation of the skeleton, and by the radionuclear 85Sr test. The relationship between the activity of bone isoenzyme and urinary hydroxyproline excretion differed in metabolic bone diseases with a high bone turnover, in patients with osteoporosis and in patients with early osteoclastic bone metastases.
...
PMID:Relationship of the activity of the bone isoenzyme of serum alkaline phosphatase to urinary hydroxyproline excretion in metabolic and neoplastic bone diseases. 10 9

Forty cases of primary hyperparathyroidism presenting over a 15 year period, have been reviewed. The disease was equally prevalent in both sexes with highest incidence in the sixth decade. Most patients presented with renal colic or calculi (73 percent) and skeletal disease was found in only 13 percent. A single parathyroid adenoma was found in 32 cases and hyperplasia was diagnosed in only two cases. Follow-up questionnaires were sent to 32 patients, and in 27 of these a full clinical and laboratory assessment was undertaken. Of 26 patients with renal colic preoperatively only six continued to experience colic one year after parathyroid surgery. Thirty percent of all patients were hypertensive preoperatively, and in only two patients did blood pressure normalise after surgery. Fourteen of 27 patients followed-up were found to be hypertensive. A highly significant fall was noted in serum calcium, chloride, alkaline phosphatase and urine calcium excretion postoperatively. Recurrence of the disease was low and less than 8 percent in this series. The low incidence (1 per 10 000 population per year) suggests that primary hyperparathyroidism is under diagnosed in the Christchurch community.
...
PMID:Primary hyperparathyroidism in a New Zealand community: a review of 40 cases. 29 Aug 84

Linear discriminant analysis, a multivariate statistical procedure, applied to serum calcium, phosphate, alkaline phosphatase, bicarbonate, chloride, creatinine and tubular reabsorption of phosphate, proved to be effective in distinguishing patients with Primary Hyperparathyroidism from other hypercalcaemic patients in eithy-four retrospective cases. The application of the model to thirty-four prospective cases enabled us to separate correctly, hyperparathyroid patients from non-parathyroid hypercalcaemic patients.
...
PMID:Discriminant analysis in the differential diagnosis of hypercalcaemia. 64 88

Although anemia has not been widely appreciated as a complication of primary hyperparathyroidism, 5.1% of the individuals with this disorder seen at the Massachusetts General Hospital since 1962 had a normochromic, normocytic anemia that could not be related to blood loss,a deficiency state, or uremia. The anemic group had more advanced bone disease and higher levels of serum calcium, alkaline phosphatase, and parathyroid hormone than the nonanemic group. Results of bone marrow biopsies performed in five patients showed variable degrees of myelofibrosis. However, none of the patients had hepatosplenomegaly, a myelophthisic peripheral blood smear, leukopenia, or thrombocytopenia. Removal of the abnormal parathyroid glands led to improvement or correction of the anemia.
...
PMID:Anemia in primary hyperparathyroidism. 85 57

Eleven cases with histologically confirmed primary hyperparathyroidism have been studied. Although histologically, bone turnover increased in all but 1 patient, urinary hydroxyproline excretion and serum alkaline phosphatase in patients with renal stones were within the upper normal limits of slightly elevated (27.5 mg/24 h, concentration 19.5 microgram/ml, alkaline phosphatase 35.0 IU/l). On the contrary, 3 cases without renal stones exhibited an increased urinary hydroxyproline excretion (129 mg/24 h, concentration 95.6 microgram/ml) and elevated serum alkaline phosphatase (99.9IU/l). Serum total hydroxyproline was elevated in both groups (renal stones, 2.00 mg%; no renal stones, 3.16 mg%; p = 0.006). Hydroxyproline was determined under conditions of a very low proline diet and 1.5 liters of daily fluid intake. There were no statistically significant differences between serum calcium, phosphorus, and parathormone between urinary excretion of calcium and phosphorus. Creatinine clearance was within normal limits in all patients. The possible relevance of urinary hydroxyproline for stone formation is discussed.
...
PMID:Urinary hydroxyproline concentration in primary hyperparathyroidism with and without renal stones. 91 50

In 22 patients who underwent surgery suspected of primary hyperparathyroidism, the surgical findings were compared with the results obtained by pre-operative parathyroid scanning and biochemical screening. Thirteen of 15 parathyroid adenomas were localized by pre-operative scanning, but in five of them a false positive focus was also described. The technique was less useful in primary hyperplasia. Comparable results were reported by other investigators. In both instances the best results were obtained in patients with high parathyroid activity as measured by plasma calcium, plasma alkaline phosphatase and tubular reabsorption of phosphorus (TRP). Parathyroid scintigraphy was especially helpful in the presence of ectopic adenomas and in patients who had undergone previous parathyroid surgery. Unfortunately, the possibility of false positive results makes it unreliable for the diagnosis of primary hyperparathyroidism.
...
PMID:Pre-operative localization of hyperfunctioning parathyroid tissue by parathyroid scintigraphy. 94 48

We examined the relationship between bone loss and several biochemical indices in 38 patients with primary hyperparathyroidism. Bone mineral density was reduced by 12 +/- 4.0% in the lumbar spine, 18 +/- 4.2% at the distal radius and 21 +/- 2.8% at the proximal radius (mean +/- SEM). There were significant negative correlations between the serum concentrations of intact parathyroid hormone (PTH) and the Z-scores of the bone mineral content at the proximal and distal radius. In the lumbar spine, bone mineral density was greater in patients with mildly elevated PTH and less in patients whose PTH levels exceeded 8.6 pmol/l. We also observed a strong association between increased levels of serum alkaline phosphatase and low bone mineral Z-scores. Our data thus indicate that cortical and, with the exception of mild primary hyperparathyroidism, trabecular bone loss is proportional to the concentration of circulating PTH and the severity of PTH-induced bone turnover. For the individual patient, however, the usefulness of intact PTH and alkaline phosphatase measurements for assessing bone loss associated with primary hyperparathyroidism seems to be only limited.
...
PMID:Serum levels of intact parathyroid hormone and alkaline phosphatase correlate with cortical and trabecular bone loss in primary hyperparathyroidism. 144 43

In this study , serum levels of classical serum markers of bone formation [carboxyterminal propeptide of procollagen type I (S-PICP), bone Gla protein (S-BGP)], and total alkaline phosphatase (S-AP)) were related to the calcium kinetic index of whole skeletal mineralization rate (m) by regression analysis in a variety of metabolic bone diseases. For each disease, the regression coefficient (r) as well as the fraction: standard error of estimate/mean dependent variable (SEE/Y) were determined. In a group of 19 normals, only the regression of S-PICP on m reached significance (r = 0.53, P < 0.02, SEE/Y = 0.44), whereas regressions of S-AP and S-BGP on m were nonsignificant. In a pooled material of high- and low-turnover bone diseases without mineralization defects or spinal fracture [myxedema, thyrotoxicosis, and primary hyperparathyroidism (n = 48)], a highly significant positive regression of S-PICP on m was demonstrable (r = 0.50, SEE/Y = 0.63, P < 0.001). The regression coefficients obtained for S-BGP and S-AP were 0.74 (P < 0.001, SEE/Y = 0.41) and 0.42 (P < 0.01, SEE/Y = 0.55), respectively. When analyzing individual diseases in this group, significant differences among the three markers were detectable. In a group of 52 osteoporotics, S-PICP correlated significantly to m (r = 0.49, P < 0.001, SEE/Y = 0.50). Corresponding r-values for S-BGP and S-AP were 0.21 (NS) and 0.48 (P < 0.001, SEE/Y = 0.61), respectively.(ABSTRACT TRUNCATED AT 250 WORDS)
...
PMID:Assessment of bone formation by biochemical markers in metabolic bone disease: separation between osteoblastic activity at the cell and tissue level. 145 Oct 6

The synthesis of osteocalcin or bone gla protein by osteoblasts is markedly stimulated by 1,25-(OH)2D, a key hormone in the regulation of bone mineralization. The circulating levels of osteocalcin have been shown to reflect both the osteoid matrix production and the formation rate of mineralized bone in several metabolic bone diseases (osteoporosis, thyrotoxicosis, primary hyperparathyroidism) in which both mechanisms are tightly coupled because of the absence of mineralization defect. In this study, we measured in 12 patients (7 women, 5 men, 56 +/- 15 yr old) with untreated osteomalacia serum osteocalcin and vitamin D metabolites (25OHD and 1,25-(OH)2D). The results were correlated with biochemical and histomorphometric assessment of bone remodeling. Osteomalacia was due to vitamin D deficiency (5 cases), to vitamin D malabsorption (6 cases), and to hypophosphataemia in 1 case. When compared to control values, serum osteocalcin was increased in patients with osteomalacia (7.4 +/- 4 vs. 3.7 +/- 1.3 ng/mL; P less than 0.001) and was positively correlated with serum alkaline phosphatase (r = 0.65; P = 0.03) and negatively with 25 OHD (r = -0.61; P = 0.04). Serum osteocalcin was not correlated with 1,25-(OH)2D [r = -0.45; not significant (NS)] even after exclusion of the patient with hypophosphataemia. Serum osteocalcin was positively correlated with the osteoid volume and osteoid perimeter (r = 0.71 and 0.69 respectively; P less than 0.01) but not with any of the tetracycline-based parameter of bone mineralization at the tissue level (r ranging from -0.41 to +0.42, NS). Serum 25 OHD, but not 1,25-(OH)2D, was positively correlated with the mineralization rate (r = 0.59; P less than 0.05 and r = 0.54; NS). We conclude that in patients with osteomalacia, a condition which is characterized by an increased osteoid accumulation due to a decreased mineralization rate, the increased level of serum osteocalcin reflects the increased osteoid synthesis but not the mineralization defect. In this disease, serum osteocalcin is inversely correlated to the severity of vitamin D deficiency reflected by serum 25 OHD, but not to the serum levels of 1,25-(OH)2D.
...
PMID:Serum osteocalcin is increased in patients with osteomalacia: correlations with biochemical and histomorphometric findings. 156 62

In order to analyze the role of 1,25(OH)2 D3 in bone and renal presentation forms of primary hyperparathyroidism (PHP), 61 patients, whose diagnosis had been confirmed surgically, were studied. An increase in serum 1,25(OH)2 D3 levels was found in PHP when compared to normal controls (49.1 +/- 2.8 pg/ml vs 34.1 +/- 1.4 pg/ml) (p less than 0.5). This increase directly correlates with serum alkaline phosphatase and creatinine clearance and inversely correlates with age. When patients were divided into two groups: A (n = 35) and B (n = 26) according to normal or increased 1,25(OH)2 D3 respectively, no difference was found in the clinical presentation forms of PHP. However, higher values of the biochemical parameters and bone remodeling markers were found in group B than in group A. This suggests the role of 1,25(OH)2 D3 as a modulator of metabolic activity in PHP and its possible therapeutic character in the clinical control of asymptomatic forms.
...
PMID:[Nephrolithiasis and bone involvement in primary hyperparathyroidism. The relative role of vitamin D]. 157 94


1 2 3 4 5 6 7 8 9 10 Next >>

---