Detection of glycosylated protein in glomeruli of STZ-induced diabetic rats using the nitroblue tetrazolium (NBT) reaction
| Autor: | Takao Kuramoto, Hiroyuki Ohmuro, Mitsumine Fukui, Akemi Saitoh, Isao Shirato, Kiichi Itoh, Yasuhiko Tomino, Hikaru Koide |
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| Rok vydání: | 1994 |
| Předmět: |
Microbiology (medical)
Male medicine.medical_specialty Glycosylation Clinical Biochemistry Kidney Glomerulus Fluorescent Antibody Technique Immunofluorescence Streptozocin Diabetes Mellitus Experimental Diabetic nephropathy Rats Sprague-Dawley Type IV collagen chemistry.chemical_compound Laminin Internal medicine Diabetes mellitus medicine Immunology and Allergy Animals Diabetic Nephropathies Glycoproteins Extracellular Matrix Proteins medicine.diagnostic_test biology Nitroblue Tetrazolium Biochemistry (medical) Public Health Environmental and Occupational Health Hematology Streptozotocin medicine.disease Rats Fibronectin Medical Laboratory Technology Fructosamine Endocrinology chemistry biology.protein medicine.drug |
| Zdroj: | Journal of clinical laboratory analysis. 8(4) |
| ISSN: | 0887-8013 |
| Popis: | Detection of glycosylated protein in renal tissues was determined in streptozotocin (STZ)-induced diabetic rats using the nitroblue tetrazolium (NBT) reaction. The glycosylation of extra-cellular matrix (ECM) components such as laminin and fibronectin was examined in vitro using the same method. Immunofluorescence staining of laminin or type IV collagen was also performed in renal tissues of STZ-induced diabetic rats. There was no significant difference in the intensity of NBT in renal tissues between 4 week STZ-induced diabetic rats and control rats of the same age. The intensity of NBT staining in the glomerular mesangial areas and capillary walls was marked in 12 week diabetic rats. The mean values of fructosamine measured by the NBT reaction in the glycosylated-laminin and fibronectin were increased dose dependently. In immunofluorescence, laminin and type IV collagen were observed significantly in the glomerular mesangial areas and capillary walls of 12 week diabetic rats. However, there was no significant change in renal histopathology in 4 and 12 week diabetic rats. It appears that the non-enzymatic glycosylation and expression of ECM components in glomeruli increased in the early stage of diabetic nephropathy prior to the appearance of marked histologic alterations. In conclusion, non-enzymatic glycosylation of glomerular structural components may play an important role in the initiation of the early stage of renal injuries in diabetes. © 1994 Wiley-Liss, Inc. |
| Databáze: | OpenAIRE |
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