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)

The potential health effects of a raw shale oil were evaluated in a 90-day inhalation study in Fischer 344 rats. Groups of 15 male and 15 female rats were exposed 6 hr/day, 5 days/week for 13 weeks to aerosol concentrations of 0, 56, 120, or 492 mg/m3. In the high-dose group, 10 males and 7 females died prior to the termination of the study, most within the first 5 weeks of the experiment. A dose-dependent suppression in weight gain was seen in all of the shale oil-exposed groups. The failure to gain weight was associated with a variety of clinicopathologic abnormalities, including a dose-related decrease in red and white blood cells, with lowered plasma protein levels and increased serum alkaline phosphatase, and with total bilirubin levels in males. The exposure of the test animals to aerosolized raw shale oil was also associated with inflammatory and hyperplastic lesions in the lungs and upper respiratory tract, atrophy of the thymus and thymic-dependent portions of the peripheral lymphoid system, and bone marrow. These changes demonstrate that inhalation of raw shale oil aerosol can produce major organ toxicity similar to that found after exposure to other unrefined oil products.
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PMID:A 90-day inhalation toxicity study of raw shale oil in Fischer 344 rats. 365 71

Adult male rats (Crl:COBS CD (SD)BR) were given undiluted ethylene glycol monobutyl ether (EGBE) by gavage in doses of 222, 443, or 885 mg/kg/day, 5 days/week over a 6-week period. A dose-dependent decrease, which was statistically significant at the high dose, was seen in body weight gain. Feed consumption was also significantly reduced at the 885-mg/kg dose. The most significant toxic effects produced by EGBE were on the red blood cells including a significant dose-dependent decrease in hemoglobin concentration, red blood cell counts, and mean corpuscular hemoglobin concentration. Mean corpuscular hemoglobin and mean corpuscular volume were increased at all dose levels. Effects secondary to the red cell effects included increased spleen weights, splenic congestion, and hemosiderin accumulation in the liver and kidneys. Relative liver weights and serum alkaline phosphatase (443- and 885-mg/kg doses) and serum alanine aminotransferase (885-mg/kg dose) levels were increased. Glucose was significantly reduced in the animals given 885 mg/kg/day. EGBE had no adverse effects on the testes, bone marrow, thymus, or white blood cells.
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PMID:Subchronic oral toxicity of ethylene glycol monobutyl ether in male rats. 369 24

Morphological studies of the thymus and the spleen were made in 54 alcohol addicts and 53 cases of other death cause at the age from 25 to 65 yr. Alcoholism was found to induce the reduction in thymus size and the number of its lobes with a simultaneous decrease of lymphocyte content in them; in the lymphatic follicles of the spleen (in the presence of infectious processes) absence of bright multiplication centres and alkaline phosphatase activity in their mantle zone cells was noted. There appeared to be a statistically significant difference in the amount of the parenchyma in the thymus of alcoholics (p less than 0.017) compared to that of the control group 0.68 +/- 0.09 g and 1.33 +/- 0.21 g, respectively and this figure was almost 4-fold less, than the average age norms, 0.26 +/- 0.03 g; the quantitative content of the splenic pulp in alcoholics also had a statistically significant difference compared to the control group (P less than 0.001), 6.37 +/- 0.66 g vs. 12.59 +/- 0.98 g, respectively. The data obtained indicate the development of immunodeficiency states in alcoholism and basing on the changes occurring in the thymus and spleen they can be referred to a combined T- and B-cell form of immunodeficiency.
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PMID:[Morphologic characteristics of the changes in the thymus and spleen in alcoholism]. 380 Jun 80

The acute intravenous, intragastric, subcutaneous, intraperitoneal and intratracheal toxicity of T2 toxin has been studied in rats, mice, guinea-pigs, and pigeons. The acute LD50 values obtained varied between 1.0 and 14 mg X kg-1, there being little difference between the various routes in any given species. T2 caused vomiting in pigeons at doses of one fifth or less the LD50. In rats doses of 3.0 and 5.0 mg X kg-1 T2 produced lymphopenia, reticulocytosis, and in the highest dose groups normoblastaemia. Additionally, changes in plasma alkaline phosphatase and aspartate aminotransferase activities were seen. Histological changes were observed in lymphoid organs and were most severe in the thymus, lymph nodes, and Peyer's patches. The spleen was less severely affected. Gastrointestinal changes consisting of dead and dying lymphoid cells throughout the lamina propria were seen together with, in some cases, mucosal ulceration. The time course of the development and of the reversal of the changes was followed.
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PMID:Acute toxicity of T2 toxin in rats, mice, guinea pigs, and pigeons. 381 Jun 51

Using the cytochemical demonstration of alkaline phosphatase (AP) two different populations of lymphocytes are seen in the short-tailed mouse Clethrionomys glareolus: AP-positive and PA-negative lymphocytes. The aim of this study was to find out as to whether in this species AP represents a cytochemical marker for differentiating T- and B-lymphocytes. For this purpose, we analysed the frequency of AP-positive lymphocytes in the peripheral blood, bone marrow, thymus, lymph node, spleen, and Peyer's patches of normal adult animals 3 months after neonatal thymectomy, and at varying times following administration of intraperitoneal injections of a maximum dose of 16-methylenprednisolone. In normal mice the frequency of AP-positive lymphocytes in peripheral blood and bone marrow corresponds to that of T-lymphocytes in other species. In the thymic cortex, nearly 100% of the lymphocytes show an AP-positive reaction. In the peripheral lymphatic organs these cells are prevailing in the T-dependent areas (paracortex of lymph node, periarteriolar lymph sheet of spleen, and serosa-near region of Peyer's patches). Neonatal thymectomy as well as administration of corticosteroid cause a significant loss of enzyme-positive lymphocytes in the organism. This T-cell reduction becomes particularly evident in B-dependent regions, because in these areas AP-positive (T-) and AP-negative (B-) cells are usually intermingled, and this provides the necessary condition of T/B-interaction, which is of immunological significance. In T-dependent zones, populated mainly by AP-positive cells, neonatal thymectomy results in overall atrophy, while T-cell depletion, expressed as a percentage, is less pronounced within these atrophied areas. Based on these findings the conclusion may be drawn that in Clethrionomys glareolus committed thymocytes, recirculating T-lymphocytes as well as T-helper cells show an AP-positive reaction in contrast to prethymic T-cells, T-suppressor cells and B-cells, which do not express this enzyme. The histochemical demonstration of lymphocytic AP therefore permits an easy visualisation and quantification of T-lymphocytes in Clethrionomys glareolus.
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PMID:[Cytochemical differentiation of T- and B-lymphocytes in the short-tailed mouse (Clethrionomys glareolus)]. 392 11

A number of organs from adult female mice were investigated after continuous application of the anticonvulsant drug valproic acid (VPA) by enzyme cytochemistry, light and electron microscopy, pharmacokinetics and clinical chemistry. VPA plasma levels were maintained between 55 micrograms/ml and 67 micrograms/ml for three days following subcutaneous implantation of drug reservoirs. Effects detectable by enzyme cytochemical or electron microscopical means were mainly observed in liver, kidney, thymus and spleen. A strict concentration-dependency of drug effects could not be found. In the liver, the activities of some surface-membrane hydrolases were increased at the biliary pole; the activities of other hydrolases were decreased or unchanged. Electron microscopically, number and length of microvilli of hepatocytes were increased and many of them showed fat inclusions, mitochondrial swellings and autophagic vacuoles. In some of the proximal convoluted tubules of the kidney, the reaction product originating from microvillous and lysosomal hydrolases was diffusely distributed and its amount lowered. This was paralleled by tubular cells with an increased number of fat droplets and swollen mitochondria or destroyed tubular cells, as demonstrated by electron microscopy. Additionally, peritubular endothelial cells were arranged in a garland-like pattern. Alkaline phosphatase was activated in the straight portion of the proximal tubules. Increased glucose, creatinine and total protein concentrations and increased gamma-glutamyl transpeptidase and alkaline phosphatase activities in the urine reflected well the damage of the proximal renal tubules. Cortical and medullary morphology varied considerably in the thymus. In extreme cases, the cortical zone was either reduced in size or the medulla showed a cortex-like structure or vice versa (inverted type of thymus). The thymic cortical reticular cells showed increased aminopeptidase A activity accompanied by a generalized aminopeptidase M and alkaline phosphatase reaction. Our data indicate that--in addition to the liver--also the kidney, thymus and spleen are target organs of VPA-induced toxicity in the mouse.
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PMID:Enzyme cytochemistry combined with electron microscopy, pharmacokinetics, and clinical chemistry for the evaluation of the effects of steady-state valproic acid concentrations on the mouse. 393 14

The chronic toxicity of a new topical glucocorticoid, difluprednate (DFBA) was studied in Beagle dogs. DFBA ointment (0.05%) was percutaneously treated to the back of dogs at daily doses of 125, 12.5 and 1.25 micrograms/kg for 6 months. The local effects of DFBA In the treated area, thinning of the skin and inhibition of the fur-growth were observed with scale and erythema. The skin showed histological atrophy of the epidermis, a decrease of the adipose tissue and atrophy of the adnexa. These changes returned to normal after the 2-month withdrawal period. The systemic effects of DFBA In the 125 micrograms/kg group, the following changes were observed, although neither death nor severe symptoms occurred: General observations were seen an increase of water intake and urinary volume. A decrease of lymphocytes and eosinophils, and an increase of neutrophils were observed in the hematological examination. There were high sodium and low potassium levels, and an increase of alkaline phosphatase and gamma-glutamyltranspeptidase activities in the biochemical examination. The organ weights showed a decrease of the thymus, adrenals, prostate and ovaries, and an increase of the liver and kidney. An atrophy of the lymphatic tissues and adrenal cortex, retardation of the sexual maturation, glycogen deposit in the hepatic cells, slight degeneration of the renal tubuli, and slight thinning of the sternum and non-treated skin were noted in the pathological examination. These changes returned to normal after the 2-month withdrawal period. In the 12.5 micrograms/kg group, the atrophic changes in the thymus, adrenal and non-treated skin appeared slight. In the 1.25 micrograms/kg group, no changes were found. Conclusively, all the local and systemic changes observed by DFBA in this study were due to the already known pharmacological effects of glucocorticoids. It is considered that a 12.5 micrograms/kg dosage is similar to a non-effect dose.
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PMID:[Chronic toxicity study on difluprednate in dogs]. 403 1

A distinct alkaline phosphatase (phosphatase N) was demonstrated in the serum of patients with acute lymphatic leukemia, chronic lymphatic leukemia, and infectious mononucleosis. This enzyme closely resembles that extracted from the thymus of mice with lymphoma or lymphatic leukemia, both in its electro-phoretic mobility and its substrate specificity. The phosphatase N activity was related to the clinical state of patients with lymphatic leukemia and disappeared with recovery from infectious mnononucleosis.
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PMID:Distinct alkaline phosphatase in serum of patients with lymphatic leukemia and infectious mononucleosis. 452 17

The lymphocytes of the rat thymus can be grossly differentiated by their cell membrane-bound proteinases. Subcapsular thymocytes lack aminopeptidase A (APA) and AMP and gamma-glutamyltranspeptidase (GGT). Cortical thymocytes show a high activity of APA but no APM and no GGT. Medullar thymocytes possess a high GGT and APM activity but are free of APA. Under Mg deficiency, the APA-negative subcapsular thymocytes are reduced. In lymphoma and beginning lymphoma, APA, APM and GGT are absent. In lymphoma, the alkaline phosphatase activity is increased. Differences are found for dipeptidylpeptidase IV (DPP IV). In some lymphoma, its activity is reduced, in others the DPP IV activity is increased.
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PMID:Enzyme histochemistry of malignant T cell lymphoma due to chronic magnesium deficiency in rats. 614 41

A study was made of the effect of different doses of hydroxythiamine on activity of alkaline phosphatase and transketolase in rat spleen and thymus during primary and secondary administration of human gamma-globulin. Immunization of rats significantly raised alkaline phosphatase activity in both organs. Administration of a large single dose of hydroxythiamine (400 mg/kg bw) reduced transketolase activity in the thymus and spleen in both immunized and non-immunized animals and did not change alkaline phosphatase activity in these organs.
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PMID:[Alkaline phosphatase and transketolase activity during immunogenesis in the lymphoid organs of rats with vitamin B1 deficiency caused by oxythiamine]. 618 76


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