Selective decrement of anionic immunoglobulin clearance after induced renal hemodynamic changes in diabetic patients
| Autor: | Domenico Andreani, Alessandro Pierucci, P. Pietravalle, U. Di Mario, Susanna Morano, Santo Morabito, Simonetti Bm, Giuseppe Pugliese, S. Bacci |
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| Rok vydání: | 1992 |
| Předmět: |
Adult
Blood Glucose Male medicine.medical_specialty Captopril Physiology Urology Hemodynamics Renal function Blood Pressure Essential hypertension Clonidine Renal Circulation Nephropathy Internal medicine Diabetes mellitus medicine Albuminuria Humans Glycated Hemoglobin business.industry Middle Aged medicine.disease Proteinuria Diabetes Mellitus Type 1 Endocrinology Blood pressure Immunoglobulin G Renal blood flow Hypertension Female Vascular Resistance business Diabetic Angiopathies Glomerular Filtration Rate medicine.drug |
| Zdroj: | American Journal of Physiology-Renal Physiology. 262:F381-F388 |
| ISSN: | 1522-1466 1931-857X |
| DOI: | 10.1152/ajprenal.1992.262.3.f381 |
| Popis: | The charge permselectivity of proteins was evaluated in diabetic patients after systemic and renal hemodynamic changes induced by an intravenous injection of an angiotensin-converting enzyme inhibitor (captopril) or of clonidine. Anionic immunoglobulin clearance (IgG4) was compared with that of total immunoglobulins, which have the same size but are mostly cationic, and of albumin. Ten type I hypertensive diabetic patients (group 1), 10 type 2 hypertensive diabetic patients (group 2), 5 type 1 normotensive diabetic patients (group 3), 10 subjects with essential hypertension (group 4), and 7 normal volunteers (group 5) received an intravenous injection of captopril (25 mg/100 ml in 5 min). Twelve of the hypertensive diabetic patients underwent a second provocative test with clonidine (150 micrograms/100 ml) (group 6) or placebo (100 ml saline) (group 7) with the same procedure. None of the patients had clinical nephropathy or other disorders. Glomerular filtration rate (GFR) and renal plasma flow (RPF) were measured before and during the tests. A significant decrease in diastolic blood pressure was observed in groups 1, 2, 4, and 6, together with an increase in the GFR and RPF values in groups 1, 2, 3, and 4 only, as well as a decrease in renal vascular resistances in groups 1, 2, 3, 4, and 6. Both clearances and fractional clearances of IgG4 and IgG decreased after captopril in groups 1 and 2.2+ The decrease in IgG4 clearance was correlated to that of renal vascular resistances in group 1 patients. A significant decrease in the anionic-cationic immunoglobulin ratio (IgG4/IgG) was observed in groups 1, 2, and 3.(ABSTRACT TRUNCATED AT 250 WORDS) |
| Databáze: | OpenAIRE |
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