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Chandramohan R, Saravanan S, Pari L. Beneficial effects of tyrosol on altered glycoprotein components in streptozotocin-induced diabetic rats. PHARMACEUTICAL BIOLOGY 2017; 55:1631-1637. [PMID: 28427293 PMCID: PMC6130643 DOI: 10.1080/13880209.2017.1315603] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
CONTEXT Olive oil is the major source of tyrosol which is a natural phenolic antioxidant. Olive oil constitutes a major component of the Mediterranean diet that is linked to a reduced incidence of chronic diseases. OBJECTIVE This study evaluates the effects of tyrosol on altered glycoprotein components in streptozotocin-induced diabetic rats. MATERIALS AND METHODS Diabetes mellitus was induced in male Wistar rats by streptozotocin (40 mg/kg body weight). These rats were administered tyrosol (20 mg/kg body weight) and glibenclamide (600 μg/kg body weight) orally daily for 45 days. Plasma glucose, plasma insulin, glycoprotein components such as hexose, hexosamine, sialic acid and fucose in the plasma, liver and kidney, and histopathogy of tissues were analyzed. RESULTS Diabetic rats revealed significant (p < 0.05) increase in the levels of glucose, hexose, hexosamine, sialic acid and fucose (277.17, 152.45, 100.43, 79.69 and 49.29 mg/dL) in the plasma; decrease in the levels of palsma insulin (6.12 μU/mL) and sialic acid (4.36 and 5.03 mg/g) in the liver and kidney; significant (p < 0.05) increase in hexose (49.33 and 46.82 mg/g), hexosamine (22.68 and 33.20 mg/g) and fucose (31.63 and 32.44 mg/g) in the liver and kidney. Further, periodic acid-Schiff staining of tissues revealed positive-stain accumulation in diabetic rats. Tyrosol treatment showed significant (p < 0.05) effects on all the biochemical parameters and histopathology studied in streptozotocin- nduced diabetic rats. Also, the in vitro study revealed the antioxidant effect of tyrosol. DISCUSSION AND CONCLUSIONS Thus, tyrosol protects streptozotocin-induced diabetic rats from the altered glycoprotein components. Further, this study can be extrapolated to humans.
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Affiliation(s)
- Ramasamy Chandramohan
- Department of Biochemistry and Biotechnology, Faculty of Science, Annamalai University, Chidambaram, India
| | - Settu Saravanan
- Department of Biochemistry and Biotechnology, Faculty of Science, Annamalai University, Chidambaram, India
| | - Leelavinothan Pari
- Department of Biochemistry and Biotechnology, Faculty of Science, Annamalai University, Chidambaram, India
- CONTACT Leelavinothan PariDepartment of Biochemistry and Biotechnology, Faculty of Science, Annamalai University, Annamalainagar – 608002, Tamil Nadu, India
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Leunissen EHP, Blanchard MG, Sheedfar F, Lavrijsen M, van der Wijst J, Bindels RJM, Hoenderop JGJ. Urinary β-galactosidase stimulates Ca2+ transport by stabilizing TRPV5 at the plasma membrane. Glycobiology 2016; 26:472-81. [PMID: 26747426 DOI: 10.1093/glycob/cwv172] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2015] [Accepted: 12/28/2015] [Indexed: 01/26/2023] Open
Abstract
Transcellular Ca(2+)transport in the late distal convoluted tubule and connecting tubule (DCT2/CNT) of the kidney is a finely controlled process mediated by the transient receptor potential vanilloid type 5 (TRPV5) channel. A complex-type-N-glycan bound at the extracellular residue Asn358 of TRPV5 through post-translational glycosylation has been postulated to regulate the activity of TRPV5 channels. Using in vitro Ca(2+)transport assays, immunoblot analysis, immunohistochemistry, patch clamp electrophysiology and total internal reflection fluorescence microscopy, it is demonstrated that the glycosidase β-galactosidase (β-gal), an enzyme that hydrolyzes galactose, stimulates TRPV5 channel activity. However, the activity of the non-glycosylated TRPV(N358Q)mutant was not altered in the presence of β-gal, showing that the stimulation is dependent on the presence of the TRPV5N-glycan. In addition, β-gal was found to stimulate transcellular Ca(2+)transport in isolated mouse primary DCT2/CNT cells. β-gal expression was detected in the apical membrane of the proximal tubules, and the protein was found in mouse urine. In summary, β-gal is present in the pro-urine from where it is thought to stimulate TRPV5 activity.
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Affiliation(s)
- Elizabeth H P Leunissen
- Department of Physiology, Radboud University Medical Center, Radboud Institute for Molecular Life Sciences, Nijmegen 6500 HB, The Netherlands
| | - Maxime G Blanchard
- Department of Physiology, Radboud University Medical Center, Radboud Institute for Molecular Life Sciences, Nijmegen 6500 HB, The Netherlands
| | - Fareeba Sheedfar
- Department of Physiology, Radboud University Medical Center, Radboud Institute for Molecular Life Sciences, Nijmegen 6500 HB, The Netherlands
| | - Marla Lavrijsen
- Department of Physiology, Radboud University Medical Center, Radboud Institute for Molecular Life Sciences, Nijmegen 6500 HB, The Netherlands
| | - Jenny van der Wijst
- Department of Physiology, Radboud University Medical Center, Radboud Institute for Molecular Life Sciences, Nijmegen 6500 HB, The Netherlands
| | - René J M Bindels
- Department of Physiology, Radboud University Medical Center, Radboud Institute for Molecular Life Sciences, Nijmegen 6500 HB, The Netherlands
| | - Joost G J Hoenderop
- Department of Physiology, Radboud University Medical Center, Radboud Institute for Molecular Life Sciences, Nijmegen 6500 HB, The Netherlands
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Lee CL, Chiu PC, Pang PC, Chu IK, Lee KF, Koistinen R, Koistinen H, Seppälä M, Morris HR, Tissot B, Panico M, Dell A, Yeung WS. Glycosylation failure extends to glycoproteins in gestational diabetes mellitus: evidence from reduced α2-6 sialylation and impaired immunomodulatory activities of pregnancy-related glycodelin-A. Diabetes 2011; 60:909-17. [PMID: 21300843 PMCID: PMC3046852 DOI: 10.2337/db10-1186] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
OBJECTIVE Gestational diabetes mellitus (GDM) is a common metabolic disorder of pregnancy. Patients with GDM are at risk for high fetal mortality and gestational complications associated with reduced immune tolerance and abnormal carbohydrate metabolism. Glycodelin-A (GdA) is an abundant decidual glycoprotein with glycosylation-dependent immunomodulatory activities. We hypothesized that aberrant carbohydrate metabolism in GDM was associated with changes in glycosylation of GdA, leading to defective immunomodulatory activities. RESEARCH DESIGN AND METHODS GdA in the amniotic fluid from women with normal (NGdA) and GDM (DGdA) pregnancies was purified by affinity chromatography. Structural analysis of protein glycosylation was preformed by lectin-binding assay and mass spectrometry. Cytotoxicity, cell death, cytokine secretion, and GdA binding of the GdA-treated lymphocytes and natural killer (NK) cells were determined. The sialidase activity in the placental tissue from normal and GDM patients was measured. RESULTS GDM affected the glycosylation but not the protein core of GdA. Specifically, DGdA had a lower abundance of α2-6-sialylated and high-mannose glycans and a higher abundance of glycans with Sda (NeuAcα2-3[GalNAcβ1-4]Gal) epitopes compared with NGdA. DGdA had reduced immuosuppressive activities in terms of cytotoxicity on lymphocytes, inhibitory activities on interleukin (IL)-2 secretion by lymphocytes, stimulatory activities on IL-6 secretion by NK cells, and binding to these cells. Desialylation abolished the immunomodulation and binding of NGdA. Placental sialidase activity was increased in GDM patients, which may account for the reduced sialic acid content of DGdA. CONCLUSIONS Taken together, this study provides the first direct evidence for altered enzymatic glycosylation and impaired bioactivity of GdA in GDM patients.
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Affiliation(s)
- Cheuk-Lun Lee
- Department of Obstetrics and Gynaecology, University of Hong Kong, Hong Kong, China
- Department of Chemistry, University of Hong Kong, Hong Kong, China
- Centre for Reproduction, Development, and Growth, University of Hong Kong, Hong Kong, China
| | - Philip C.N. Chiu
- Department of Obstetrics and Gynaecology, University of Hong Kong, Hong Kong, China
- Centre for Reproduction, Development, and Growth, University of Hong Kong, Hong Kong, China
- Corresponding author: Philip C.N. Chiu,
| | - Poh-Choo Pang
- Division of Molecular Biosciences, Faculty of Natural Sciences, Imperial College London, London, U.K
| | - Ivan K. Chu
- Department of Chemistry, University of Hong Kong, Hong Kong, China
| | - Kai-Fai Lee
- Department of Obstetrics and Gynaecology, University of Hong Kong, Hong Kong, China
- Centre for Reproduction, Development, and Growth, University of Hong Kong, Hong Kong, China
| | - Riitta Koistinen
- Department of Clinical Chemistry, University of Helsinki and Helsinki University Central Hospital, Helsinki, Finland
| | - Hannu Koistinen
- Department of Clinical Chemistry, University of Helsinki and Helsinki University Central Hospital, Helsinki, Finland
| | - Markku Seppälä
- Department of Clinical Chemistry, University of Helsinki and Helsinki University Central Hospital, Helsinki, Finland
| | - Howard R. Morris
- Division of Molecular Biosciences, Faculty of Natural Sciences, Imperial College London, London, U.K
| | - Bérangère Tissot
- Division of Molecular Biosciences, Faculty of Natural Sciences, Imperial College London, London, U.K
| | - Maria Panico
- Division of Molecular Biosciences, Faculty of Natural Sciences, Imperial College London, London, U.K
| | - Anne Dell
- Division of Molecular Biosciences, Faculty of Natural Sciences, Imperial College London, London, U.K
| | - William S.B. Yeung
- Department of Obstetrics and Gynaecology, University of Hong Kong, Hong Kong, China
- Centre for Reproduction, Development, and Growth, University of Hong Kong, Hong Kong, China
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Normalizing effects of Costus speciosus rhizome crude extracts and its fractions on diabetic complications in STZ-induced diabetic rats. Med Chem Res 2010. [DOI: 10.1007/s00044-010-9448-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Bassi AM, Ledda S, Valentini S, De Pascale MC, Rossi S, Odetti P, Cottalasso D. Damaging effects of advanced glycation end-products in the murine macrophage cell line J774A.1. Toxicol In Vitro 2002; 16:339-47. [PMID: 12110271 DOI: 10.1016/s0887-2333(02)00016-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The interaction of reducing sugars, such as aldose, with proteins and the subsequent molecular rearrangements, produces irreversible advanced glycation end-products (AGEs), a heterogeneous class of non-enzymatic glycated proteins or lipids. AGEs form cross-links, trap macromolecules and release reactive oxygen intermediates. AGEs are linked to aging, and increase in several related diseases. The aim of this study was to assess, in a murine macrophage cell line, J774A.1, the effects of 48 h of exposure to glycated serum containing a known amount of pentosidine, a well-known AGE found in the plasma and tissues of diabetic and uremic subjects. Fetal bovine serum was incubated with ribose (50 mM) for 7 days at 37 degrees C to obtain about 10 nmol/ml of pentosidine. The cytotoxic parameters studied were cell morphology and viability by neutral red uptake, lactate dehydrogenase release and tetrazolium salt test. In the medium and in the intracellular compartment, bound and free pentosidine were evaluated by HPLC, as sensitive and specific glycative markers, and thiobarbituric acid reactive substances (TBARs), as index of the extent of lipid peroxidation. Our results confirm that macrophages are able to take up pentosidine. It is conceivable that bound pentosidine is degraded and free pentosidine is released inside the cell and then into the medium. The AGE increase in the medium was combined with an increase in TBARs, meaning that an oxidative stress occurred; marked cytotoxic effects were observed, and were followed by the release of free pentosidine and TBARs into the culture medium.
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Affiliation(s)
- A M Bassi
- Department of Experimental Medicine, Section of General Pathology, University of Genoa, Via L.B. Alberti, 2, I-16132, Genoa, Italy.
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Rellier N, Ruggiero-Lopez D, Lecomte M, Lagarde M, Wiernsperger N. In vitro and in vivo alterations of enzymatic glycosylation in diabetes. Life Sci 1999; 64:1571-83. [PMID: 10353622 DOI: 10.1016/s0024-3205(99)00094-6] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Carbohydrate composition changes of glycoconjugates constituting the glycocalix of microvascular cells could be involved in the alterations of cell-cell interactions observed in diabetic retinopathy. In this field, we have recently reported that advanced glycation end products (AGEs) modify galactose, fucose and sialic acid contents of specific cellular glycoproteins. To better understand the mechanisms involved in glycoprotein modifications in diabetes, we now investigate whether glucose and AGEs could affect the activities of enzymes involved in galactose, fucose and sialic acid metabolism : glycosyltransferases (synthesis) and glycosidases (catabolism). For this, bovine retinal endothelial cells (BREC) and pericytes (BRP) were cultured in the presence of high glucose concentration or AGEs, and cell glycosidase and glycosyltransferase activities were measured. The same enzymatic activities were studied in the whole retina from streptozotocin-treated rats. The results show that high glucose concentration did not affect glycosidases and glycosyltransferases neither in BRP nor in BREC except for galactosyltransferase activities in BREC. Concerning BRP, only galactosyltransferase activities were altered by AGEs. In contrast, in BREC, AGEs increased beta-D galactosidase, alpha-L fucosidase and neuraminidase activities (+37%, +56%, 36% respectively) whereas galactosyltransferase, fucosyltransferase and sialyltransferase activities were decreased (-11%, -24% and -23% respectively). In the retina from diabetic rats, beta-D galactosidase, alpha-L fucosidase and neuraminidase activities increased (+70%, +57%, +78% respectively) whereas fucosyl and sialyltransferase decreased (-7% and -15% respectively). The possible consequence of these enzymatic activity changes could be a defect in the carbohydrate content of some glycoproteins that might participate in the endothelial cell dysfunctions in diabetic microangiopathy.
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Affiliation(s)
- N Rellier
- Diabetic Microangiopathy Research Unit, LIPHA-INSERM U352, INSA-Lyon, Villeurbanne, France
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Miralles JM, Velasco J, Villabona V, Sanchez-Bernal C, Perez N, Corrales JJ, Garcia-Diez LC, Villar E. Prospective study of the enzymatic activities in urine of N-acetyl-beta-D-glucosaminidase, alpha-D-mannosidase, alpha- and beta-D-glucosidases, alpha-L- and beta-D-fucosidases, and beta-D-galactosidase in type I diabetes mellitus with early nephropathy. J Diabetes Complications 1993; 7:199-203. [PMID: 8343614 DOI: 10.1016/1056-8727(93)90045-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Different surveys have been carried out on the plasma activities of different glycosidases in patients with insulin-dependent diabetes mellitus, but research on urinary glycosidases in this disease is scanty and incomplete. To elucidate the behavior of these lysosomal enzymes in the metabolic alterations occurring in the glomerular basal membrane during the initial stages of diabetic nephropathy, we conducted a prospective study to examine the urinary activities of N-acetyl-beta-D-glucosaminidase (NAG), alpha-D-mannosidase, alpha- and beta-D-glucosidase, alpha-L- and beta-D-fucosidase, and beta-D-galactosidase in patients with type I insulin-dependent diabetes mellitus, surveyed over 18 months, whose early diabetic nephropathy was detected by the presence of microalbuminuria. The simultaneous determination of beta 2-microglobulin in urine confirmed the glomerular origin of the albuminuria. No statistically significant correlation was found between the levels of albuminuria and the activities of any of the glycosidases analyzed. In the diabetic patients, a significant decrease was observed in the activities of all the enzymes (p < 0.05), except NAG and alpha-D-mannosidase, although the decrease in the latter was very close to statistical significance (p = 0.028, unilateral; p = 0.057 bilateral). Similarly, in the patients, there was a significant negative correlation (p < 0.05) with the serum levels of fructosamine, except with beta-D-galactosidase, which showed a positive correlation (p < 0.05) with fructosamine and blood HbA1c.(ABSTRACT TRUNCATED AT 250 WORDS)
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Corral J, Miralles JM, García-Pascual IJ, Corrales JJ, García-Sastre A, Villar E. Increased serum N-acetyl-beta-D-glucosaminidase and alpha-D-mannosidase activities in obese subjects. THE CLINICAL INVESTIGATOR 1992; 70:880-4. [PMID: 1450611 DOI: 10.1007/bf00180432] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
We have studied N-acetyl-beta-D-glucosaminidase and alpha-D-mannosidase activities in human sera from 35 control subjects, 47 normo- and hyperinsulinemic obese persons, and 12 diabetic patients after a fasting period of 12 h and at 30, 60, 90, and 120 min after an oral glucose overload. The results show a significantly higher activity of these 2 enzymes in obese subjects and diabetic patients, of similar magnitude, especially in those obese persons with a higher grade of obesity. Moreover, the activity of these glycosidases decreases in a similar way in all these 3 groups after the oral glucose overload.
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Affiliation(s)
- J Corral
- Departamento de Bioquímica y Biología Molecular, Facultad de Biología, Universidad de Salamanca
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Shanmugasundaram ER, Rajeswari G, Baskaran K, Rajesh Kumar BR, Radha Shanmugasundaram K, Kizar Ahmath B. Use of Gymnema sylvestre leaf extract in the control of blood glucose in insulin-dependent diabetes mellitus. JOURNAL OF ETHNOPHARMACOLOGY 1990; 30:281-294. [PMID: 2259216 DOI: 10.1016/0378-8741(90)90107-5] [Citation(s) in RCA: 103] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
GS4, a water-soluble extract of the leaves of Gymnema sylvestre, was administered (400 mg/day) to 27 patients with insulin-dependent diabetes mellitus (IDDM) on insulin therapy. Insulin requirements came down together with fasting blood glucose and glycosylated haemoglobin (HbA1c) and glycosylated plasma protein levels. While serum lipids returned to near normal levels with GS4 therapy, glycosylated haemoglobin and glycosylated plasma protein levels remained higher than controls. IDDM patients on insulin therapy only showed no significant reduction in serum lipids, HbA1c or glycosylated plasma proteins when followed up after 10-12 months. GS4 therapy appears to enhance endogenous insulin, possibly by regeneration/revitalisation of the residual beta cells in insulin-dependent diabetes mellitus.
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Cabezas-Delamare MJ, Cabezas JA. Glycosidase activities in sera from convalescent patients who ingested a toxic oil. Clin Chim Acta 1985; 146:129-34. [PMID: 3987046 DOI: 10.1016/0009-8981(85)90051-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Some glycosidase activities have been determined in blood sera from 21 patients who ingested a toxic oil (rapeseed oil denatured with aniline(s) and treated by a thermal process). The samples were collected from the same patients on 3 or 4 occasions during a period of 11-12 mth. During this period, the clinical state of the patients improved and, generally, they were restored to health. beta-N-Acetylglucosaminidase, alpha-L-fucosidase, beta-D-glucuronidase, beta-D-glucosidase and alpha-D-mannosidase activities, which were higher in patients than in 17 controls during the first mth decreased to normal values in the period studied, 11-12 mth. In contrast, beta-D-galactosidase, alpha-D-galactosidase and alpha-D-glucosidase activities, which were initially lower in patients than in controls, were finally similar or higher than in controls. One explanation for these results could be the possible alteration of the cell membrane(s) by the toxic substance(s).
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Serrano MA, Cabezas JA, Reglero A. Carbohydrate contents, and glycosidase and glycosyl transferase activities in tissues from streptozotocin diabetic mice. COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY. B, COMPARATIVE BIOCHEMISTRY 1985; 80:629-32. [PMID: 3924473 DOI: 10.1016/0305-0491(85)90303-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The contents of hexoses and hexosamines in brain, liver, and kidney of streptozotocin diabetic mice are significantly increased in comparison to the controls. These differences for hexoses contents in the heart are not significant. N-acetyl-beta-D-glucosaminidase and beta-D-glucosidase activities in brain, liver and kidney of diabetic mice are significantly higher when compared to the controls. However, beta-D-galactosidase activity is significantly lower in brain, liver, spleen and kidney of the diabetic mice, in comparison to the controls and similar in heart. alpha-D-Mannosidase activity of diabetic mice is significantly increased in spleen and heart and significantly decreased in liver and kidney. alpha-L-Fucosidase of diabetic mice shows higher activities, with significant differences, in liver and spleen; however, in heart and kidney the activities are significantly lower. Brain sialyltransferase and galactosyltransferase activities are significantly increased in diabetic mice; but for heart and kidney these differences are not significant. The activity for brain and kidney fucosyltransferase is not significant and that for the other assayed organs is significantly higher in comparison to the controls.
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