Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: EC:3.1.3.1 (alkaline phosphatase)
 47,916 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Ten patients with vitamin D resistant hypophosphataemic osteomalacia are described. They had hypophosphataemia with a decreased tubular reabsorption of phosphate, malabsorption of calcium and phosphorus, proximal myopathy and extensive osteomalacic changes on iliac crest bone biopsy. The plasma alkaline phosphatase and urine hydroxyproline, however, were raised in only some of the patients. Treatment with 1alpha-hydroxyvitamin D3 in high doses rapidly cured the myopathy, increased calcium and phosphorus absorption and retention and healed the osteomalacia. Phosphorus supplements were not required.
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PMID:Vitamin D resistant hypophosphataemic osteomalacia: treatment with 1alpha-hydroxyvitamin D3. 20 18

The effectiveness of 1alpha-hydroxycholecalciferol [1alpha-OH)D3] in healing uremic bone disease was investigated in 10 uremic patients on maintenance dialysis. Seven patients received 1alpha-(OH)D3, 2 microgram/day, for six months, and three patients served as a control group. Bone density was determined from X-rays of the second phalanx of the second digit. The apparent intestinal calcium absorption improved on treatment with 1alpha-(OH)D3, serum calcium levels and bone density significantly increased, and a significant decrease in serum alkaline phosphatase activity was observed. In one patient, reversal of uremic myopathy occurred after 17 days of 1alpha-(OH)D3 therapy.
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PMID:1alpha-hydroxycholecalciferol: a promising therapeutic approach for renal osteodystrophy. 68 Nov 63

This paper explores in patients with dialysis osteodystrophy the relationship between clinical features and histological, radiological, and biochemical findings. Eighty-five patients treated by hemodialysis for more than 6 months were studied. The following conclusions were drawn: 1) Bone pain in patients on regular hemodialysis is usually a symptom of developing osteomalacia but not of hyperparathyroidism or osteoporosis. 2) Many patients with histological osteomalacia and radiological features of osteomalacia, such as fractures or Looser zones, have no symptoms. 3)In dialysis patients, biochemical and radiological abnormalities are not a reliable means of predicting the presence of osteomalacia, but a raised serum alkaline phosphatase is a good indicator of the presence of osteitis fibrosa. For early detection of osteomalacia, bone biopsy in necessary. 4)A number of our dialysis patients develop an unusual form of osteomalacia characterized by absent or minimal histological osteitis fibrosa, a normal serum alkaline phosphatase, and a high incidence of myopathy and fractures.
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PMID:Hemodialysis bone disease: correlation between clinical, histologic, and other findings. 68 26

Weanling rats were fed vitamin E deficient diets for 6 to 15 weeks and then given vitamin E orally for 4 days. Plasma obtained 1 day after the last dose was assayed for glutamic oxalacetic transaminase (GOT) and pyruvate kinase activity (PK). Administration of vitamin E resulted in reduction in activity of both enzymes. Plasma levels of alkaline phosphatase, lactic dehydrogenase, and bilirubin were unaffected by vitamin E and there was no histological evidence of liver degeneration. The number of phagocytized muscle fibers was greatly reduced by vitamin E treatment, but a substantial number of necrotic fibers were still present. With more prolonged (8 days) treatment, plasma PK and GOT levels were reduced to levels found in plasma of vitamin E replete animals and few degenerated muscle fibers could be observed. It was concluded that resolution of the necrotizing myopathy in vitamin E deficient rats is a rapid process and that the decreased activity of PK and GOT in plasma is a sensitive indicator of the resolution process. The decrease in plasma enzyme levels is an easily quantitated and reproducible biological response to vitamin E administration. Thus, this approach provides a basis for a sensitive and accurate bioassay for vitamin E activity.
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PMID:Plasma activity of pyruvate kinase and glutamic oxalacetic transaminase as indices of myopathy in the vitamin E deficient rat. 72 46

Four patients with advanced chronic renal failure and osteodystrophy were treated with 1-alphahydroxycholecalciferol, a synthetic vitamin D analogue, in a daily oral dose of 1.5 to 2.0 mug, for periods up to 1 year. They showed increased calcium absorption, positive calcium and phosphorus balances, moderate increases in serum calcium levels, marked reductions in serum alkaline phosphatase levels, a decrease in serum immunoreactive parathyroid hormone levels, and radiologic and histologic improvement in bone disease. One patient with proximal myopathy showed improvement in muscular strength. 1-Alphahydroxycholecalciferol appears to be effective therapy for renal osteodystrophy.
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PMID:1-alphahydroxycholecalciferol in chronic renal failure. Studies of the effect or oral doses. 125 63

Osteomalacia is characterized by large osteoid seams and a preserved volume of bone trabeculae. The mineralization of newly formed bone requires adequate concentrations of calcium and phosphate: the Ca.P product has been regarded as a useful, empirical diagnostic test of osteomalacia. It decreases in patients with osteomalacia mainly because they have very low plasma phosphate levels. At present total body bone mineral and total body bone density can be directly measured by whole body absorptiometry, which indicates the lowest total mineral content of the skeleton which can increase quickly after adequate treatment. The main symptoms of osteomalacia are: bone pain; muscular weakness (commonly as pelvic girdle myopathy); Looser-Milkman pseudofractures or more often a pattern of generalized demineralization at X-ray. The main biochemical parameters in osteomalacia include: defective calcium absorption with hypocalcemia and hypocalciuria; defective intestinal phosphate absorption with hypophosphatemia; there is often increased renal phosphate clearance due to hypocalcemia and secondary hyperparathyroidism; elevated alkaline phosphatase and osteocalcin levels; high bone turnover confirmed by kinetic studies carried out with radiocalcium or 99mTc-MDP. An etiological classification of the osteomalacias includes: 1) nutritional osteomalacia: a) inadequate exposure to sunlight and/or insufficient vitamin D intake; b) defective intestinal absorption of vitamin D because of malabsorption syndromes (e.g. jejuno-ileal bypass for obesity).(ABSTRACT TRUNCATED AT 250 WORDS)
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PMID:The osteomalacias. 166 41

In 21 patients with chronic renal failure spirometric and electromyographic examinations (including m. pectoralis, m. rectus abdomini, and m. obligus abdomini) were performed before and after hemodialysis. In 10 patients treated by peritoneal dialysis and, in 35 patients treated by hemodialysis serum PTH, thyroid hormones (T4, T3, rT3), CPK, aldolaze, pyruric acid, lactic acid, alkaline phosphatase were determined. In both groups before and after dialysis serum sodium, potassium, calcium, magnesium were determined. We observed negative correlation between PTH and respiratory muscles weakness indices. This fact may confirm the contribution of PTH in uremic myopathy evaluation.
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PMID:[Analysis of the causes of respiratory muscle hypotonia in patients with chronic renal failure treated by peritoneal dialysis and hemodialysis]. 183 10

1. The incidence of microscopically detectable degenerative characteristics in 5 skeletal muscles (m. pectoralis thoracicus, m. supracoracoideus, m. biceps femoris, m. semitendinosus, m. femorotibialis medius) of turkeys was investigated. 2. Samples were obtained from 30 Large White turkey males 14, 16 and 18 weeks old. Hyaline degeneration, infiltration of mononuclear cells and necrotic fibres were observed. 3. Individual fibres varied greatly in size and muscle fibre nuclei were often shrunken and pyknotic. 4. Weak and/or uniform reaction for Ca++-ATPase and SDH in all types of muscle fibres and loss of alkaline phosphatase activity in cell membranes were noted. A positive reaction for acid phosphatase occurred in regions of perivascular infiltration and in necrotic muscle fibres. The majority of muscle fibres possessed high activity for phosphorylase a and b. 5. Based on the use of fluorescein alpha-bungarotoxin conjugate, motor end-plates appeared to be morphologically intact. Direct immunofluorescence with anti-chicken IgG showed positive reaction in muscle fibres undergoing necrosis and in the involved connective tissue. 6. Degenerative changes varied with age and were most marked in the oldest birds. 7. Because gross degenerative symptoms were absent from both the birds and the meat from them, the condition appears to be either different from or a precursor to the degenerative myopathy characterised by other authors.
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PMID:Incidence of microscopically detectable degenerative characteristics in skeletal muscle of turkey. 252 47

Six polypeptides resolved by two-dimensional electrophoresis of homogenates from human skeletal muscle have been identified as tropomyosin by electrophoretic and immunochemical methods. The 6 proteins are consistently present in approximately the same abundance in normal biceps, deltoid, gastrocnemius, and quadriceps muscle. Analysis of samples from individuals with Becker's dystrophy, Duchenne dystrophy, limb girdle dystrophy, polymyositis, myopathy related to vitamin E deficiency, type II fiber deficiency, and from an infant with indistinct fiber type differentiation, however, showed quantitative variations in the tropomyosin pattern. Muscle with histochemically demonstrated type II fiber deficiency lacked two of the normal tropomyosin proteins and the type II myosin light chains. Muscles lacking type I myosin light chains were deficient in a different pair of tropomyosin proteins. The results suggest that normal human skeletal muscle contains one major type of tropomyosin protein (beta-tropomyosin) common to both fast and slow fibers, together with two other major proteins (alpha-tropomyosin and alpha'-tropomyosin), one of which is specific to fast fibers and the other to slow fibers. Preliminary data from the reaction of muscle homogenates with alkaline phosphatase indicate that 3 of the 6 tropomyosin polypeptides resolved by two-dimensional electrophoresis are phosphorylated forms of the alpha-, alpha'-, and beta-tropomyosins.
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PMID:Heterogeneity of human skeletal muscle tropomyosin. 389

The occurrence of alkaline phosphatase was observed in regenerating muscle fibres, especially in polymyositis and muscular dystrophy. No differences in the appearance of this enzyme were seen in these diseases. Alkaline phosphatase was not encountered in neurogenic atrophy, with the exception of cases of an accompanying myopathy. These cases show a clear picture without problems in the morphological differential diagnosis. The histochemical demonstration of the enzyme is helpful in the differential diagnosis of neurogenic atrophy and muscular dystrophy of benign type. It is of no use to distinguish between muscular dystrophy of malignant type and parenchymatous polymyositis.
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PMID:The significance of the detection of alkaline phosphatase in the diagnosis of neuromuscular diseases. 396 33


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