Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UNIPROT:Q9UIJ5 (Rec)
 58,342 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

The correlation between the cytochemistry (glycoprotein, glycogen, glucose-6-phosphatase, catalase, alkaline phosphatase) and the growth rate of the fast-growing Morris hepatoma 3924A and the slow-growing Morris hepatoma 9618A was studied by utracytochemical techniques. By the chromic acid-phosphotungstic acid technique, acid glycoprotein is stained in glycocalyx, Golgi saccules and vesicles, and secretory granules of the tumor cells of both hepatomas. However, the hepatoma 3924A cells contain thicker glycocalyx and more numerous glycoprotein-rich granules than hepatoma 9618A cells. Abundant alpha and beta glycogen particles are found in hepatoma 3924A. Moderate glucose-6-phosphatase activity is observed in the cisternae of endoplasmic reticulum and nuclear envelope of hepatoma 9618A, but it is totally absent in hepatoma 3924A. High catalase activity is present in numerous peroxisomes of hepatoma 9618A. Hepatoma 3924A contains only a few catalase-positive microperoxisomes. Weak to moderate alkaline phosphatase is present in the plasma membrane and nuclear envelope of hepatoma 9618A cells, while hepatoma 3924A shows no activity of the enzyme. All the cytochemical parameters except glycoprotein show an inverse relationship with the growth rate of the hepatomas. The higher intracellular glycoprotein content of hepatoma 3924A may be related to differences in cell coat secretion (composition and activity) from the slower-growing hepatoma 9618A
Anat Rec 1982 Feb
PMID:Correlation between growth rate and cytochemistry in Morris hepatomas. 627 86

Distribution of alkaline phosphatase (ALPase) activity on the plasma membrane of rat hepatocytes in primary monolayer culture was observed using the backscattered electron image (BEI) mode. Apparent reaction product was seen in hepatocytes cultured for 48 or 72 hours in a concentration of 8 X 10(5) cells per ml, and those cultured for 72 or 96 hours in a concentration of 6 or 4 X 10(5) cells per ml. The reaction product was observed as scattered fine dots, as spots, and as bands along the cell edge, with high contrast in flattened polyhedral hepatocytes forming cell trabeculae. The deposition of the reaction product was generally more abundant at the periphery of the cell trabeculae. X-ray microanalysis revealed that the reaction product contains both lead and phosphorus as real ALPase reaction product. In transmission electron microscopy, the reaction product was exclusively localized on the external surface of the plasma membrane. However, the plasma membrane adjoining the culture substratum was devoid of the reaction product. Further, the highest biochemical ALPase activity appeared in earlier culture stages when the density of cultured cells was larger. Thus, during a few days of culture, ALPase activity increases on the plasma membrane predominantly at the periphery of the hepatocyte trabeculae. This increase in the activity might be related to the mechanism of preserving the cell shape.
Anat Rec 1983 Dec
PMID:Observation of cytochemical alkaline phosphatase activity on the plasma membrane of cultured rat hepatocytes by backscattered electron imaging. 636 42

Regional differences in the proximal part of mouse epididymis were reported to provide a morphological baseline for studies on functional zonation of this part that is critical in sperm maturation. Macroscopical, histological, ultrastructural, and histochemical observations permitted us to subdivide this part into five segments, characterized by epithelial height, nuclear position, cytological and histochemical features of principal cells. Segment I corresponded to the initial segment previously described in rodents. Segment II differed from segment I by endoplasmic reticulum (ER) and dictyosomes aspect in principal cells, apical alkaline phosphatase and Ca2+-dependent ATPase activities. Segment III was characterized by spermatozoa package, high content of cells in multivesicular bodies, mitochondria shape, complex interdigitating membranes, and strong periodic acid-Schiff (PAS)-positive cell border. Segments IV and V presented the same cytological features but differed by their esterase activity. In the principal cells of each segment, dense spherical concretions were scattered in ER caveolae. Cells with apical nuclei were classified into two groups. The cells of the first group presented the same morphological and histochemical features as the adjacent principal cells and were scattered in the five segments ("apical cells"). The cells of the second group differed from the others by their goblet shape, a dense cytoplasm, and a high mitochondria succinate-D activity. They presented different cytological and histochemical features depending on their localization in segments I ("narrow cells"), II ("prominent cells"), or III, IV, V ("mitochondria goblet-cells"). The possible relationships between epithelium structure and epididymal functions were herein discussed.
Anat Rec 1984 Jun
PMID:Regional differences of the proximal part of mouse epididymis: morphological and histochemical characterization. 646 30

An enzyme-linked immunosorbent assay (ELISA) for the detection of Streptococcus agalactiae antibodies in bovine milk was developed using whole bacterial cells as antigen. Microtitre wells were coated overnight at room temperature with a 1:64 dilution of antigen in 0.05M carbonate-bicarbonate buffer at pH 9.6. After washing, milk whey samples diluted 1:40 were added, incubated overnight and again washed. After incubation with rabbit antibovine serum, bound antibody was detected with alkaline phosphatase conjugated sheep antirabbit serum. Using the ELISA, the levels of Str agalactiae antibodies in the individual quarters of the mammary glands of cows in a severely infected dairy herd were measured. A high proportion of cows had specific antibody to Str agalactiae in one or more quarters. Using ELISA in association with electronic cell count and bacterial isolation, it was possible to identify latent and subclinical carriers of infection.
Vet Rec 1982 Mar 13
PMID:Enzyme-linked immunosorbent assay for Streptococcus agalactiae antibodies in bovine milk. 704 85

Resorption of uncalcified cartilage in the embryonic chick femur appears to be mediated by two types of mononuclear cells. One cell type lies flattened and adherent along the surface of the cartilage matrix into which it extends cellular processes. Cytological characteristics of a large, euchromatic nucleus containing a nucleolus, and cytoplasm containing moderate to extensive amounts of rough endoplasmic reticulum indicate that these are protein synthetic cells. Macrophages, characterized by a pleomorphic shape and cytoplasm containing numerous mitochondria and vesicles, comprise the second cell type. These may be seen lying in contact with cartilage matrix, but are more likely located in the nonhematopoietic marrow adjacent to resorbing cartilage, where they establish close cellular associations with protein synthetic cells. Alkaline and acid phosphatase histochemical studies differentiate these two cellular types. Marrow alkaline phosphatase activity is restricted to the cartilage-marrow interface from which it diffuses a short distance into cartilage matrix, but does not diffuse into nearby marrow. Intracellular alkaline phosphatase is present only in protein synthetic cells that line the surface of cartilage, and thus appears to be produced by these cells. Acid phosphatase positive macrophages are scattered throughout the marrow, but are found in greatest concentrations in the region of cartilage resorption. They are rarely in direct contact with cartilage, and there is no evidence that acid phosphatase is released from these cells. The relative localizations and the presence of cellular interactions of these two cell types suggests that protein synthetic cells may be of fibroblastic origin, and may play a primary role in cartilage degradation, while macrophages, in keeping with biochemical evidence, play an adjunct or possibly a regulative role.
Anat Rec 1982 Apr
PMID:The cellular organization of fibroblastic cells and macrophages at regions of uncalcified cartilage resorption in the embryonic chick femur as revealed by alkaline and acid phosphatase histochemistry. 707 91

Three young dogs with a history of apathy, anorexia and weight loss were presented with severe ascites. Abnormal laboratory findings include hypoalbuminaemia and increased activities of alkaline phosphatase, serum aspartate amino-transferase, serum glutamic pyruvic transaminase and gamma-glutamyl transferase. Ammonia tolerance was also abnormal. At autopsy ascites and peripheral portosystemic collaterals were found. The livers were abnormally small and firm and their surfaces were irregular. Histologically, there was marked periportal fibrosis, increased numbers of bile ductules and arteriolae in the portal areas and an absence of normal portal vein tributaries. No inflammatory changes were found. These lesions are discussed in relation to the various causes of hepatic fibrosis.
Vet Rec 1982 Jun 19
PMID:Hepatoportal fibrosis in three young dogs. 711 76

Blood samples were taken before and after a cross country race over the marathon distance of 42 km. There was a rise in blood glucose and plasma free fatty acids and glycerol associated with a rise in plasma cortisol and glucagon but the fall in insulin was not significant (P > 0.05). Plasma potassium and albumin concentrations increased, calcium decreased and there was no change in sodium or bicarbonate concentrations. There was an increase in plasma urea, creatinine, uric acid, bilirubin and isocitrate dehydrogenase but no change in alkaline phosphatase. There was a rise in plasma creatine kinase. These results of a competitive race are compared with those of the 80 km non-competitive Golden Horseshoe Ride.
Vet Rec 1980 Dec 06
PMID:A biochemical study of the Arab Horse Society's marathon race. 746 99

Two dogs with metabolic epidermal necrosis had hyperkeratosis of the footpads accompanied by erythematous, erosive and crusting lesions affecting the muzzle, external genitalia, perineum and periocular regions. Histopathological examination of skin biopsies revealed a superficial hydropic dermatitis with marked parakeratosis. Both dogs had high plasma activities of alkaline phosphatase and alanine aminotransferase and high concentrations of glucose, and also a marked hypoaminoacidaemia. Despite these similarities, the cutaneous eruptions were associated with different underlying diseases. One dog had a pancreatic carcinoma which had metastasised widely; the primary tumour and the metastases showed glucagon immunoreactivity on immunocytochemical staining, and the dog's plasma glucagon concentration was markedly greater than that of control dogs. The other dog had diffuse hepatic disease; its plasma glucagon concentration was similar to that of control samples and cirrhosis was identified post mortem. Metabolic epidermal necrosis in dogs is a distinct cutaneous reaction pattern which may be associated with different underlying systemic diseases; however, the pathogenesis of the skin lesions remains unclear.
Vet Rec 1995 May 06
PMID:Metabolic epidermal necrosis in two dogs with different underlying diseases. 763 36

Glucocorticoids and sex-steroids can modulate osteogenesis in vivo and in vitro. Although the effects of glucocorticoids on bone cells in vitro have been described in detail, the role of sex-steroids is not as well defined. We examined whether sex-steroids influence bone metabolism indirectly by regulating glucocorticoid effects on bone. Interactions of the sex-steroid progesterone or its analog RU38486 with the glucocorticoid dexamethasone (dex) were studied in functional assays of osteogenesis. Three osteoblastic models were evaluated: (1) the rat bone marrow stromal cell (RBMC) nodule system; (2) the chick periosteal osteogenesis (CPO) model; and (3) ROS 17/2.8 cells. RU38486, progesterone, and unlabelled dex competitively inhibited 3H-dex uptake by ROS 17/2.8 cells as well as its (3H-dex) binding to cytosol preps. Both RU38486 and progesterone inhibited dex-induced increases in alkaline phosphatase in CPO cultures, in RBMC cultures, and in ROS 17/2.8 cells. Dex-induced decreases in cell proliferation in ROS 17/2.8 cells were reversed by RU38486 but dex-induced increases in proliferation in the CPO model were not affected. In CPO cultures, dex-induced increases in collagen synthesis were inhibited completely by RU38486 and progesterone. Dex-dependent nodule formation in the RBMC was blocked by RU38486. Both RU38486 and dex mediated reduction of calcium uptake in the CPO model but did not affect mineralized tissue area. The data indicate that RU38486 and progesterone competitively inhibit dex-mediated stimulation of osteogenesis in vitro; this inhibition is exerted on early but not late stage differentiation events of osteoprogenitor cells.
Anat Rec 1995 Jun
PMID:Probing glucocorticoid-dependent osteogenesis in rat and chick cells in vitro by specific blockade of osteoblastic differentiation with progesterone and RU38486. 766 5

To study competence and the process of transformation (TFN) in pneumococci, we developed a method for isolating TFN- mutants using insertional inactivation coupled with fusions to the gene for alkaline phosphatase (phoA). One TFN- mutant transformed 2 log units less efficiently than the parent strain. Reconstitution of the mutated region revealed a locus, rec, that contains two polycistronic genes, exp10 and the previously identified recA (B. Martin, J. M. Ruellan, J. F. Angulo, R. Devoret, and J. P. Claverys, Nucleic Acids Res. 20:6412, 1992). Exp10 is likely to be a membrane-associated protein, as it has a prokaryotic signal sequence and an Exp10-PhoA fusion localized with cell membranes. On the basis of sequence similarity, pneumococcal RecA is a member of bacterial RecA proteins responsible for homologous recombination of DNA. DNA-RNA hybridization analysis showed that this locus is transcribed as a polycistronic message, with increased transcription occurring during competence. With an Exp10-PhoA chimera used as a reporter, there was a 10-fold increase in the expression of the rec locus during competence while there was only minimal expression under growth conditions that repressed competence. The TFN- mutant containing the exp10-phoA fusion produced activator, a small extracellular polypeptide that induces competence, and the expression of rec was induced in response to activator. Therefore, the rec locus is directly required for genetic transformation and is regulated by the cell signaling mechanism that induces competence.
 ...
PMID:The rec locus, a competence-induced operon in Streptococcus pneumoniae. 779 54


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