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Immunohistochemical localisation of glutathione peroxidase in bovine, porcine and rat tissues.

Renny McKeown

Immunohistochemical localisation of glutathione peroxidase in bovine, porcine and rat tissues.

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Published by The Author) in (s.l .
Written in English


Edition Notes

Thesis (M. Sc. (Contemporary Biological Sciences)) - University of Ulster, 1998.

ID Numbers
Open LibraryOL18263809M

Proper physiological function of the ovaries is very important for the entire female reproductive system and overall health. Reactive oxygen species (ROS) are generated as by-products during ovarian physiological metabolism, and antioxidants are indicated as factors that can maintain the balance between ROS production and clearance. A disturbance in this balance can induce pathological. Since targeting oxidative stress markers has been recently recognized as a novel therapeutic target in cancer, it is interesting to investigate whether genetic susceptibility may modify oxidative stress response in cancer. The aim of this study was to elucidate whether genetic polymorphism in the antioxidant enzymes is associated with lipid peroxidation in breast cancer. We conducted a study.   Phospholipid hydroperoxide glutathione peroxidase (PHGPx) is a selenoprotein belonging to the family of glutathione peroxidases and has been implicated in antioxidative defense and spermatogenesis. PHGPx accounts for almost the entire selenium content of mammalian testis. In an attempt to verify the expression pattern of PHGPx, testes of mouse mutants with arrest at different . Controlled oxidation, such as disulfide bond formation in sperm nuclei and during ovulation, plays a fundamental role in mammalian reproduction. Excess oxidation, however, causes oxidative stress, resulting in the dysfunction of the reproductive process. Antioxidation reactions that reduce the levels of reactive oxygen species are of prime importance in reproductive systems in maintaining the.


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Immunohistochemical localisation of glutathione peroxidase in bovine, porcine and rat tissues. by Renny McKeown Download PDF EPUB FB2

The distribution of glutathione peroxidase (GSH-PO) in the brain of rats was studied by using the peroxidase-anti-peroxidase (PAP) immunohistochemical Cited by: Abstract.

Glutathione peroxidase (GSH-PO), a selenium-dependent and lipid peroxide-scavenging enzyme that effectively reduces lipid peroxides with the concomitant oxidation of glutathione is distributed in mitochondria (1, 2).Utsunomiya et al.

confirmed the dual localization of GSH-PO in the cytosol and mitochondria of normal rat have shown that short-term incubation with Cited by: 1. Glutathione Peroxidase Immunohistochemical Localization Fatty Degeneration Immunocytochemical Localization Kidney Homogenate These keywords were added by machine and not by the authors.

This process is experimental and the keywords may be updated as the learning algorithm : S. Mizuiri, K. Hirata, S. Izumi, N. Komatsu, S. Yoshimura, K. Watanabe. Glutathione peroxidase is an antioxidant enzyme that contains selenium.

It is present in the glandular epithelium of human endometrium. Application Glutathione Peroxidase from bovine erythrocytes has been used as an oxygen radical scavenger to study its effect on cytotoxicity of 1,3-dilinoleoylglycerol (DLG) against E1A-3Y1 cells. agent, on the gene Immunohistochemical localisation of glutathione peroxidase in bovine of glutathione peroxidase, which is one of the antioxidant enzymes, in the livers of mice and also to examine the immunohistochemical localization of the enzyme.

The 24 male Swiss albino mice used in the study were divided into 3 groups: experimental (n = 8), sham (n = 8), and control (n = 8). Cellular glutathione peroxidase (GPx) is a member of a family of GPx enzyme whose function is to detoxify peroxides in the cell. Because peroxides can decompose to form highly reactive radicals, the GPx enzymes play a critical role in protecting the cell from free radical damage, particularly lipid peroxidation.

The. PDF | Distribution of microsomal glutathione transferase (mGST) protein in rat tissues was investigated by immunohistochemistry.

Studies on the | Find, read and cite all the research you need. Selenium-dependent glutathione peroxidase-GI is a major glutathione peroxidase activity in the mucosal epithelium of rodent intestine.

Biochim Biophys Acta Crossref | PubMed | ISI Google Scholar; 17 Forstrom JW, Zakowski JJ, Tappel AL. Identification of the catalytic site of rat liver glutathione peroxidase as selenocysteine. bers from Drosophilu, rat and maize [5, Relatively little is known about the functions, regulation and subcellular localization of plant glutathione S-transfer- ases.

A protective role of these enzymes is suggested from enzymic studies which have shown that plant glutathione S- transferases may catalyze the conjugation of GSH to, for ex. Glutathione Peroxidase (GPx, EC ) is an enzyme family with peroxidase activity, and plays important role in protecting of organisms from oxidative damage.

It converts reduced glutathione (GSH) to oxidized glutathione (GSSG), to reduce lipid hydroperoxides to their corresponding alcohols, or reduce free hydrogen peroxide to water. Glutathione peroxidase 4 (GPx4, EC ) is a well‐characterized selenoprotein belonging to the family of glutathione peroxidases.

It reduces membrane lipid hydroperoxides to corresponding alcohols using glutathione (GSH) as reducing substrate, hence originally named phospholipid hydroperoxide porcine and rat tissues. book peroxidase [ 1 ]. glutathione peroxidase diffusely stained the cytoplasm. Bronchiolar cilia showed marked to intense immuno- staining for copper, zinc superoxide dismutase, catalase, and glutathione peroxidase.

The localization of glutathione S-transferase isoenzymes was similar to that of the antioxidant enzymes with predominant staining found in respiratory.

Glutathione peroxidase (GPx) (EC ) is the general name of an enzyme family with peroxidase activity whose main biological role is to protect the organism from oxidative damage.

The biochemical function of glutathione peroxidase is to reduce lipid hydroperoxides to their corresponding alcohols and to reduce free hydrogen peroxide to water. Introduction. Glutathione-peroxidase (GPx1) which effectively reduces the lipid peroxides is a selenium-dependent enzyme that exists as a homotetramer with each kDa subunit containing a selenium atom incorporated within a catalytically active selenocystein residure [].There are three other members of the selenium-dependent GPx1 family, although cytosolic GPx1 is the predominant form.

This is the first report to describe the successful detection of human gastrointestinal glutathione peroxidase in normal tissues by Western blotting and immunohistochemical staining techniques. Four hybridoma clones producing monoclonal antibodies (MAbs) against the human gastrointestinal glutathione peroxidase were established from mice.

mmunological titration of SAH hydrolase activity from bovine and rat kidney. SAH hydrolase (50 l) was incubated with the indicated amounts of the antiserum at RT in 50 mM potassium phosphate, pH 1. Masui. Mar;35(3) [Immunohistochemical localization of glutathione peroxidase in the rat brain].

[Article in Japanese] Ushijima K, Miyazaki H, Morioka T. Immunohistochemical localization of antioxidant enzymes in adult Syrian hamster tissues and during kidney development.

Am J Pathol. Jul; (1)– [PMC free article] Bennett CF, Spector DL, Yeoman LC. Nonhistone protein BA is a glutathione S-transferase localized to interchromatinic regions of the cell nucleus.

Glutathione Peroxidase (GPx) Glutathione peroxidase (GPx) is an antioxidant enzyme "family". GPx functions in the scavenging and inactivating of hydrogen and lipid peroxides, thereby protecting the body against oxidative stress. In fact, it is one of the most important antioxidant enzymes in humans.

Isolation of tissues and Immunohistochemical localization of GST isoenzymes At the end of 21 weeks of diabetes, the animals were sacrificed and small portions of the liver, kidney and testis were immediately removed and fixed overnight in freshly prepared Zamboni’s fixative as described earlier (Raza et al., ).

Introduction. Glutathione S-transferases (GSTs) (EC ) are known as a large family of abundant enzymes in most organisms. GSTs are detoxification enzymes that catalyze the conjugation of a wide range of electrophilic compounds to glutathione (GSH), a tripeptide found in all mammalian cells [1– 3].These compounds include carcinogens, environmental pollutants, anticancer.

Partial sequence of human plasma glutathione peroxidase and immunologic identification of milk glutathione peroxidase as the plasma enzyme. J Nutr ; Pushpa V, Burdsal CA. Rat phospholipid hydroperoxide glutathione peroxidase: cDNA cloning and identification of multiple transcription and translation sites.

J Biol Chem ;   Optimisation of a coupled enzymatic assay of glutathione peroxidase activity in bovine milk and whey. International Dairy Journal10 Catalase and Glutathione Peroxidase in Normal Tissues and Neoplastic Cell Lines.

Purification and immunohistochemical localization of rat liver glutathione peroxidase. Biochemistry All Publications/Website.

OR SEARCH CITATIONS. Search results for glutathione peroxidase at Sigma-Aldrich. Compare Products: Select up to 4 products. *Please select more than one item to compare. Immunohistochemical localization of GSTA in different bovine tissues.

Paraffin embedded tissues were incubated with anti-p28 antibody (, dilution), and the complex was revealed with a mouse monoclonal antibody coupled to alkaline phosphatase and NBT/BCIP used as substrate. Antioxidant drugs have been reported to protect pancreatic islets from the adverse effects of chronic exposure to supraphysiological glucose concentrations.

However, glucose has not been shown to increase intracellular oxidant load in islets, nor have the effects of increasing or inhibiting glutathione peroxidase (GPx) activity on islet resistance to sugar-induced oxidant stress been studied. Localization of the Trace Elements Iron, Zinc and Selenium in Relation to Anatomical Structures in Bovine Ovaries by X-Ray Fluorescence Imaging - Volume 21 Issue 3 - Melanie J.

Ceko, Katja Hummitzsch, Wendy M. Bonner, Jade B. Aitken, Kathryn M. Spiers, Raymond J. Rodgers, Hugh H. Harris. Abstract: We determined the changes in the levels of the mammalian small heat shock protein of 25‐28 kDa (hsp27) and the hsp αB‐crystallin in various regions of rat brain after kainic acid‐induced.

Glutathione peroxidase 1 (glutathione: H 2 O 2 oxidoreductase, ECGPx1 or cGPx) is abundant in the cytoplasm of almost all mammalian tissues.

Its gene is characterized by the ProLeu polymorphism and a number of leucine-repeated alanine (A7L) codons, which are associated with the risk of cancer and type 2 diabetes.

Abstract. Trypanosoma brucei, the causative agent of African sleeping sickness, encodes three nearly identical cysteine homologues of the classical selenocysteine-containing glutathione gh one of the sequences, peroxidase III, carries both putative mitochondrial and glycosomal targeting signals, the proteins are detectable only in the cytosol and mitochondrion of.

Glutathione peroxidase has been purified partially from various tissues (). Recently, Flohe and his group (11, 12) have purified and studied the properties of glutathione peroxi- dase from beef erythrocytes.

Dietary selenium has been shown to exert a protective effect against the oxidative damage to rat. liver tissues, and helps to determine the severity of hepatic injury. We aimed to study the oxidative stress state in children with chronic hepatitis by using indi- rect approach in which antioxidant enzymes such as glutathione peroxidase (GPX), superoxide dismutase (SOD).

Human, Mouse, Rat Bovine, Dog, Guinea pig, Hamster, Monkey, Rabbit, Sheep, Xenopus Impact of carbonylation on glutathione peroxidase-1 activity in human hyperglycemic Immunohistochemical localization of MnSOD in pancreas tissue, Abstract; Cytotoxic and genotoxic effects mediated by M2 muscarinic receptor activation in.

Glutathione peroxidase (GPX) contains selenium at a catalytic site and uses GSH as an electron donor for the reduction of H 2 O 2 to H 2 O, converting itself to its oxidized form, glutathione disulfide (GSSG) (16,17).

GSH is considered one of the most important agents of the antioxidant defense system of the cell. Glutathione peroxidase 3 is a selenium-dependent enzyme playing a critical role in detoxifying reactive oxidative species and maintaining the genetic integrity of mammalian cells.

In this report, we found that the expression of glutathione peroxidase 3 (GPx3) was widely inactivated in prostate cancers.

Complete inactivation of GPx3 correlates with a poor clinical outcome. Glutathione peroxidase 4 (GPx4) is the only enzyme capable of reducing toxic lipid hydroperoxides in biological membranes to the corresponding alcohols using glutathione as the electron donor.

GPx4 is the major inhibitor of ferroptosis, a non‐apoptotic and iron‐dependent programmed cell death pathway, which has been shown to occur in.

Nonsense-mediated Decay of mRNA for the Selenoprotein Phospholipid Hydroperoxide Glutathione Peroxidase Is Detectable in Cultured Cells but Masked or Inhibited in Rat Tissues.

Xiaolei Sun, Xiaojie Li, Patrick M. Moriarty, Tamás Henics, Jeffrey P. LaDuca, and ; Lynne E. Maquat. (strain BL21) extracts containing GST alone, GST-YWHAH and PIG-2 deletion mutants or GST-PIG-2 and YWHAH deletion mutants were incubated with 30 μl of glutathione-sepharose in μl of lysis buffer (20 mM Tris-HCl [pH ], 50 mM NaCl, mM EDTA, % Triton X, containing 1 mM phenylmethylsulfonyl fluoride, 5 mM dithiothreitol.

Superoxide dismutase (SOD) is an antioxidant enzyme involved in the defense system against reactive oxygen species (ROS). SOD catalyzes the dismutation reaction of superoxide radical anion (O2) to hydrogen peroxide, which is then catalyzed to innocuous O2 and H2O by glutathione peroxidase and catalase.

Several classes of SOD have been identified. Glutathione (GSH) is one of the most important agents of the antioxidant defense system of the cell because, in conjunction with the enzymes glutathione peroxidase (GSH-Px) and glutathione S transferase pi (GSTpi), it plays a central role in the detoxification and biotransformation of chemotherapeutic drugs.

This study evaluated the expression of GSH and the GSH-Px and GSTpi. [] Williams K, Frayne J, Hall L. Expression of extracellular glutathione peroxidase type 5 (GPX5) in the rat male reproductive tract.

Mol Hum Reprod ; [] Beiglbock A, Pera I, Ellerbrock K, Kirchhoff C. Dog epididymis-specific mrna encoding secretory glutathione peroxidase-like protein. J Reprod Fertil ; []. Representative images of histology (first row) and immunohistochemical detection of 3-NT (second row) and DNP (third row) during the evolution of the kidney damage produced by K 2 Cr 2 O study was performed in control rats (day 0) and on days 2 and 12 after a single injection of K 2 Cr 2 O 7 (15 mg/Kg).

(A) Normal kidney histology from control rat (H/E).