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Query: UMLS:C0020538 (hypertension)
 170,190 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Immunotactoid glomerulopathy is characterized by the ultrastructural finding of fibrillary or microtubular deposits in patients without systemic diseases such as SLE, diabetes, paraproteinemias, cryoglobulinemia, or amyloidosis. These deposits correspond in most (but not all) cases to immunoglobulin and complement deposits as shown by immunohistochemical techniques. Different light microscopic patterns (mesangioproliferative, membranous, membranoproliferative, and crescentic) have been reported. Clinical presenting feature is characterized by proteinuria (often of nephrotic range), hematuria, and hypertension in most cases. Chronic renal failure requiring hemodialysis or transplantation is described in more than half the patients. Pathogenesis has not yet been elucidated and only some speculative hypotheses have so far been suggested. At present there is no clear evidence that we are dealing with a new pathologic entity, but larger series must be collected and studied in order to find a correct taxonomic collocation of this glomerulopathy.
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PMID:Immunotactoid glomerulopathy (ITGP): a not fully defined clinicopathologic entity. 851 98

The prevalence of hypertension in diabetes is significantly higher than in non-diabetics, perhaps twice as common. The excess is related to diabetic nephropathy, mainly in type 1 diabetes, to obesity, mainly in type 2 diabetes, but also to increased sympathetic activity. Furthermore, the increased prevalence of hypertension may relate to insulin resistance and its sequelae. Insulin resistance leads to hyperinsulinemia, relates to increased LDL and reduced HDL levels, causes the development of impaired glucose tolerance and type 2 diabetes and might also be causally related to the onset of hypertension. Syndrome X has relevant therapeutic implications in the management of hypertension. Hypertension is a major risk factor for large vessel disease in diabetics and also a risk factor for microangiopathy, particularly nephropathy. The incidence of atherosclerotic disease is dramatically increased in both type 1 and type 2 diabetics and is the major cause of morbidity and premature death mainly in patients with raised urinary albumin excretion. Thus, diabetics show a two-fold increased risk of coronary heart disease, 2-6 fold increased risk of stroke and a several-fold increased risk of peripheral vessel disease. Some evidence suggests that hypertension may be a risk factor for retinopathy, particularly its progression, but surely hypertension is a significant risk factor for nephropathy, accelerating its progression and perhaps even causing the onset of the glomerulopathy. The mechanisms by which hypertension might contribute to the evolution of both large vessel as well as small vessel disease is still unknown, although increased capillary leakage and vascular endothelium alterations might be important factors.(ABSTRACT TRUNCATED AT 250 WORDS)
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PMID:[Hypertension and diabetes]. 856 58

Four cases of fibrillary glomerulopathy (FGP) were reported for the first time in China. All patients had proteinuria, microscopic hematuria and hypertension. Renal function deteriorated in 2 cases. Pathological findings in light microscopy were sever: MPGN (2 cases), MN (1 case) and MsPGN (1 case). Congo-red stain of renal specimens was negative in all of them. Immunofluoscence (IF) in most of the cases (3/4 cases) showed granular IgG and C3 deposits in mesangium and glomerular basement membrane (GBM). Electron microscopy (EM) showed rich of fibrils distributed randomly over mesangium and GBM, the diameter of fibrils was 20.50 +/- 0.37nm. The diagnosis of FGP depends on EM examination. The actual incidence of FGP in China needs further studies.
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PMID:[Clinical and pathological analysis of fibrillary glomerulopathy]. 858 80

The effects of 3, 15, and 27 months of treatment with nitrendipine (10 to 40 mg/day) and enalapril (5 to 20 mg/day) on diastolic blood pressure (DBP), overnight urinary albumin excretion (UAE) rate, glomerular filtration rate (GFR), and renal plasma flow (RPF) were studied prospectively in a parallel group design in 13 microalbuminuric non-insulin dependent diabetic patients with mild hypertension and biopsy-proven diabetic glomerulopathy. Throughout the study period DBP decreased in both groups to < 95 mm Hg. At three months UAE, GFR, and RPF did not change significantly. At 15 and 27 months UAE (microgram/min, geometric mean and 95% C.I.) decreased respectively from 47.4 (23.4 to 95.9) to 28.6 (10.3 to 79.4), and to 22.3 (10.9 to 45.2; P = 0.0005) with nitrendipine, and from 58.3 (30.3 to 110.9) to 44.1 (22.9 to 84.8), and to 14.7 (4.4 to 49.3; P = 0.0025) with enalapril. Four patients in each group were normoalbuminuric at 27 months and none became macroalbuminuric. At 15 months the GFR (ml/min/1.73 m2, mean +/- SD) increased from 69.5 +/- 15.2 to 96.6 +/- 22.0 (P < 0.05) with nitrendipine and from 58.9 +/- 10.7 to 78.5 +/- 11.0 (P < 0.05) with enalapril. At 27 months the GFR was still numerically higher that at baseline either with nitrandipine (81.2 +/- 7.8) and with enalapril (79.9 +/- 17.7) (P = 0.7). The RPF (ml/min/1.73 m2, mean +/- SD) at baseline and at 27 months was comparable either with nitrendipine (456.6 +/- 165.3 vs. 400.9 +/- 112.9) and with enalapril (400.3 +/- 81.3 vs. 399.0 +/- 123.7). Both treatments were well tolerated. This is the first evidence that long-term effective control of arterial blood pressure by a calcium channel blocker or by an angiotensin converting enzyme inhibitor, in addition to reducing albuminuria, also improves GFR in incipient nephropathy.
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PMID:Nitrendipine and enalapril improve albuminuria and glomerular filtration rate in non-insulin dependent diabetes. 874 21

Glomerular filtration rate (GFR) decreases with advancing age, particularly in men, although the rate of decrease in GFR is highly variable. Renal vasoconstriction contributes to the decrease in GFR because of increased renal nerve activity, angiotensin II, endothelin, and decreases in vasodilatory prostacyclin levels. Intrarenal nitric oxide activity may be enhanced during aging, perhaps as part of a compensatory response. The atrial natriuretic peptide system is altered during aging, but there is probably no net change in intrarenal hemodynamic actions. Glomerular damage also contributes to age-dependent decreases in GFR. The primary mechanisms are unknown, but they involve a buildup of mesangial extracellular matrix materials. Increases in vasoconstrictor, growth promoting factors, and/or decreases in vasodilator, growth inhibiting factors may contribute. Androgens provide a risk factor. Glomerular hypertension and/or hypertrophy are not primary factors in the development of age-dependent glomerulopathy, but will worsen the process when present.
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PMID:The aging glomerulus. 882 65

We report the case of a 90-year-old lady who presented with full-blown nephrotic syndrome. Percutaneous renal biopsy allowed us to confirm the diagnosis of minimal change glomerulopathy; she entered a 2-year period of remission after a 6-month course of prednisone (starting dose 1.5 mg/kg). The patient sustained minor effects of both renal biopsy and corticotherapy. Percutaneous renal biopsy is justified in the very elderly because the risk of mortality and morbidity related to corticotherapy outweigh the risk related to percutaneous renal biopsy, providing high-risk patients are excluded, such as amyloidosis or abnormal coagulation or uncontrolled arterial hypertension.
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PMID:Minimal change glomerulonephritis in a 90-year-old patient: what is the ideal approach? 885 67

We have previously shown that idiopathic focal segmental glomerulosclerosis (FSGS) is the most common non-proliferative primary glomerulopathy in adult African Americans. In this report we present our experience with treated FSGS in 15 such patients followed over five years. They were all treated with prednisone 60 mg daily for three months, followed by a slow tapering. In addition, two patients later had cyclophosphamide, and five had enalapril. At entry hypertension was present in 73% of the patients, nephrotic syndrome in 87%, and elevated serum creatinine (> or = 1.4 mg/dl) in 40%. Five of the 15 patients (33%) developed end-stage renal failure (ESRF), one of them having a "malignant" course after the advent of pregnancy. Two patients (13%) have chronic renal insufficiency (CRI; serum creatinine > 2.5 mg/dl); three (20%) have mild renal insufficiency (serum creatinine 1.4-2.5 mg/dl), and five patients (33%) have normal renal function. The cumulative renal survival was 93% at five years, but only 26% at eight years. At last follow-up all the ten patients who did not develop ESRF were in partial remission (urinary protein of 1.3 g/day +/- 1.21), but 4 of the 5 patients who did not develop ESRF had no prolonged partial remission of nephrotic syndrome. Neither the initial clinical parameters not the use of enalapril correlated with the renal outcome (univariate analysis). However, 4 of the 5 patients who developed ESRF had elevated serum creatinine at entry, versus only 2 of the 10 not developing ESRF (p = 0.09 by two-sided, and 0.045 by one-sided Fisher's exact test). We conclude that the short-term renal outcome in nephrotic adult African Americans with treated FSGS is comparable to that of the non-African Americans, but their long-term prognosis may be poorer. Patients developing ESRF were more likely to present with elevated serum creatinine. Enalapril did not seem to modify the course of renal disease, but its utility and that of other ACE inhibitors in the treatment of FSGS must await prospective randomized studies.
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PMID:Focal segmental glomerulosclerosis in adult African Americans. 895 19

We describe a patient with idiopathic membranous glomerulopathy who developed acute deterioration in renal function; this was associated with hemoptysis, severe hypertension, and anti-glomerular basement membrane (anti-GBM) antibody in the serum. Despite aggressive therapy with plasmapheresis, cyclophosphamide and prednisone, the patient progressed to end-stage renal failure and is on maintenance hemodialysis.
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PMID:Goodpasture's syndrome superimposed on membranous nephropathy. A case report. 896 42

Human immunodeficiency virus-associated nephropathy (HIVAN), characterized by heavy proteinuria, rapidly progressive renal failure, "collapsing" glomerulopathy, and tubulointerstitial abnormalities, is the most common finding in HIV-infected patients undergoing a renal biopsy and predominantly affects blacks. We describe the clinical features and renal pathologic findings of 12 intravenous drug users (IVDUs) coinfected with HIV and hepatitis C virus (HCV) who were selected for renal biopsy because they presented with features different from typical HIVAN, including hypertension, microscopic hematuria, and cryoglobulinemia. There were seven black and five Hispanic patients. Eleven patients had immune complex glomerulonephritis (ICGN); one had glomerulosclerosis with immune complex deposits. Ten individuals had evidence of past hepatitis B viral infection, but none had persistent hepatitis B surface antigenemia. No other underlying cause for immune complex glomerulonephritis was identified. Renal biopsy showed membranoproliferative glomerulonephritis in five patients, mesangial proliferative glomerulonephritis in five, membranous nephropathy in one, and "collapsing" glomerulopathy with immune complex deposits in one. Hepatitis C virus RNA was detected by reverse transcription-polymerase chain reaction (RT-PCR) in the renal tissue and/or serum of nine of the 11 patients tested, and also in the renal biopsy tissue of four of eight patients with clinical and pathologic features of typical HIVAN without immunofluorescence evidence of immune complex deposits. One patient presented with renal failure, five patients developed end-stage renal disease (ESRD) requiring hemodialysis (mean time, 6.5 months), and six had stable renal function after a mean follow-up of 29.1 months (range, 2 to 72 months). Liver function abnormalities were present in seven of the 12 individuals, including four of the six patients who developed renal failure. These findings indicate that in some patients coinfected with HIV and HCV, the development of ICGN may dominate the clinical course of the disease. The occurrence of ICGN among black patients at risk for HIVAN may be related to the relatively high prevalence of HCV infection among IVDUs in this group.
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PMID:Immune complex glomerulonephritis in patients coinfected with human immunodeficiency virus and hepatitis C virus. 910 39

We investigated persistent significant proteinuria (PSP), defined as proteinuria > 1 gr/24 hours on three consecutive months, in renal allograft recipients. The clinical records of 273 patients (288 grafts) were reviewed and 236 grafts (178 live related, 58 cadaver donor) that functioned for at least 4 months (230 patients, 148 men and 82 women) were selected for analysis. The histological diagnoses of 226 grafts and 35 native kidneys were also reviewed. PSP was present in 67 grafts (28.4%); 43 of these grafts were studied histologically (transplant glomerulopathy (TxGPT) 19, idiopathic glomerulopathy (GP) 13, and chronic rejection 11). Patients with an idiopathic GP in the graft usually presented with the nephrotic syndrome (65%); this presentation was infrequent in patients with chronic rejection. The appearance of proteinuria was strongly associated with functional deterioration in grafts with chronic rejection and TxGPT; in grafts with PSP and a histological diagnosis of idiopathic GP, renal function was usually normal. Within grafts with PSP no statistically significant differences in actuarial survival (AS) could be established when the time of appearance or magnitude of PSP, the presence or absence of arterial hypertension, the immunosuppressive regimen, and the histological diagnosis were considered. Contrariwise, the difference in AS was highly significant (p < 0.0001) when grafts with and without PSP were compared. The former had an AS at 5 and 10 years of 74.6% and 55.7%, while in the case of the latter AS was 57.3% and 32.1%, respectively. In conclusion, in the present series 28.4% of grafts that functioned 4 months or more presented PSP. The most frequent glomerular lesion was TxGPT. The presence of PSP was a marker for poorer prognosis, since AS at 5 and 10 years was significantly less in this group.
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PMID:[Incidence, etiology and prognostic value of persistent significant proteinuria in kidney transplants]. 913 38


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