Factors determining renal function in Korean patients with autosomal dominant polycystic kidney disease / 대한내과학회지

BACKGROUND/AIMS: Previous studies of autosomal dominant polycystic kidney disease (ADPKD) in Koreans have been predominantly cross-sectional and insufficient to elucidate factors determining renal function. METHODS: We retrospectively reviewed the medical records of 60 patients who were diagnosed with ADPKD in our hospital from 1995 to 2005. We surveyed the basal characteristics, symptoms, signs, blood and urine laboratory findings, radiologic extrarenal abnormalities, and kidney length through ultrasonography, and these measures were analyzed to identify their relationship to decreased renal function. RESULTS: The clinical characteristics, such as symptoms and signs, were similar to those reported previously. Following t-tests and simple regression analyses, the statistically significant variables related to renal function deterioration were as follows: hypertension (with decreased renal function, 2.5 mL/min/1.73 m2/year more rapidly than the no-hypertension group, p=0.006), hypercholesterolemia (p=0.007), hypernatremia (p=0.011), mean kidney length (beta=0.378, p=0.029), and albumin (beta=-2.067, p=0.003). The multiple regression analysis revealed that the significant factors were hypertension (beta=0.261, p=0.016), mean kidney length (beta =0.211, p=0.047), and hypernatremia (beta=0.244, p=0.024). CONCLUSIONS: The independent risk factors for deteriorating renal function in Korean patients with ADPKD were hypertension, hypernatremia, and mean kidney length.

Adenovirus-mediated Gene Therapy of Uteroglobin Protects the Experimental Glomerulonephritis in Mice / 대한신장학회잡지

PURPOSE: Uteroglobin (UG), steroid inducible cytokine-like protein, has potent anti-inflammatory and immunomodulatory action. It is secreted by the mucosal epithelia of virtually all mammals. The aims of this study were to investigate the efficacy of recombinant adenovirus carrying uteroglobin (AdCMV-UG) in prevention and treatment of glomerulonephritis (GN) in mice. METHODS: The AdCMV-UG was created by inserting the uteroglobin cDNA into the pAdTrack- CMV vector and was transfected into the 293 cells through liposome mediated vehicles. AdCMV-UG was injected direct to the both kidneys of 20 mice. In control groups (disease controls), 13 mice received adenoviral vector with GFP and another 11 mice received PBS only. After 5days of viral injection, GN was induced by repetitive intravenous injection of 3.0 mg rabbit anti-GBM Ab to the pretreated mice (C57/B6). Histological and biochemical changes were evaluated 7 and 14 days after injection of anti-GBM Ab. RESULTS: UG was expressed in the renal tissues and mesangial cells infected with the infection of AdCMV-UG. Pretreatment with AdCMV-UG attenuated the cellular crescent formation 7 days after induction of GN when compared to AdCMV-GFP, PBS only. We also observed reduced mesangial matrix expansion in mice treated with adenovirus carrying UG. Proteinuria was significantly reduced in the mice treated with adenovirus carrying UG when compared with disease control mice (AdCMV-UG 102.2+/-20.97, AdCMV-GFP 170.6+/-41.77, and PBS 169.8+/-55.67, respectively p<0.05 mg/mg). However, at 14 days after anti-GBM Ab injection (total 19 days), there was no significant difference in the amounts of prot einuria and morphologic findings between pretreated and disease control groups. CONCLUSION: Adenoviral mediated gene transfer is an effective way of gene delivery. Locally expressed uteroglobin attenuated the severity of glomerulonephritis induced by anti-GBM antibody, although it was transient. Gene therapy using uteroglobin may be constituted for the treatment of human diseases such as chronic GN.

Aminoglycoside Nephrotoxicity Using 99mTc-DTPA Renal Scan / 대한신장학회잡지

Aminoglycoside has a broad-spectrum bactericidal activity and especially excellent effect on gram negative bacteria. But, its harmful effect is existed about kidney and ear. Among these, many studies were done about aminoglycoside nephrotoxicity. Until now, many authors have been reported its incidence was 4.45-45%. We needed parameters monitoring about nephrotoxicity. So, our study was done using 99mTc-DTPA renal scan to evaluate nephrotoxicity. We enrolled forty patients who admitted due to infection. 32 patients received Netilmicin and 8 patients Isepamicin. Mean duration and dosage were 8 days, 200mg daily. We accomplished 99mTc-DTPA renal scan, 24hr urine study and blood sampling before starting antibiotics. After mean 8 days, same procedure was repeated. Aminoglycoside nephrotoxicity(defined as 50% GFR reduction) was presented in only one patient. She didn't have risky factor, such as hepatic dysfunction, hypotension, previous renal problem. However, duration was longer than other patients(13 days). GFR was fallen by 25-50% in 6 patients. This finding represent nephrotoxic effects of aminoglycoside indirectly. Above 6 patients had not any characteristics compared to other 33 patients. In addition to renal scan, sodium excretion was increased compared to pre-antibiotics, and glomerular filtration rate using 99mTc-DTPA renal scan was positively correlated with 24hr urine creatinine clearance, GFR by Cockcroft & Gault equation. I conclude that aminoglycoside has nephrotoxic effect when used for longer period. Thus, I suggest that DTPA renal scan including other many renal monitoring method has usefulness in revealing aminoglycoside nephrotoxicity.

The Usefulness of DEXA about Nutritional Assesment in Chronic Renal Failure / 대한신장학회잡지

It has been considered that the nutrition affects the mortality of chronic renal failure patients. Thus, several studies reported the method of examination about nutritional status in chronic renal failure patients. The purpose of the present study was to evaluate the nutritional status of 32 chronic renal failure patients, and recommend DEXA as a objective method. Thirty two chronic renal failure patients and 24 disease-free persons on kidney(control group) were included in this syudy. There were no difference in mean age, sex, weight, height, body mass index between two groups. We measured % total body fat, fat-free mass, limb fat, trunl fat, limb fat/trunk fat ratio with Hologic QDR 4500. The results were as follows. 1)% Total body fat of chronic renal failure patients was 20.7+/-7.9%. That was lower than 26.3+/-7.9% of control group(P<0.05). 2)Fat-free mass of chronic renal failure patients revealed lower result compared with control group. Each result was 40.2+/-12.2kg, 46.2+/-9.1kg(P<0.05). 3)Despite of no significant difference between two groups in ratio of limb fat and trunk fat, limb fat and trunk fat were statistically different(Limb fat:CRF-5.6+/-2.4kg, Control-7.1+/-1.9kg, Trunk fat:CRF- 5.2+/-3.0kg, Control-7.7+/-2.7kg)(P<0.05). 4)Triceps skinfold thockness was positively correlated with % total body fat, limb fat, trunk fat, and negatively correlated with fat-free mass. Mid- arm muscle area circumference had inverse relationship above(P<0.05). 6)Severe malnurished patients(SGA-C group) had lower result compared to mild-moderate malnurished patients(SGA-B group) about %TBF, LF,TF, total lymphocyte count. In addition to DEXA, we examined triceps skinfold thickness and mid-arm muscle area circumference. The result showed significant comparison between two groups, too. But albumin, cholesterol, potassium level was no statistical significant difference, except lymphcyte count. In conclusion, as suggested by above results, chronic renal failure patients has protein-calorie malnutrition. This nutritional status affects long-term survival of chronic renal failure patients. DEXA can give objective data accompanied with simple anthropometric measurement in nutriti onal status. Thus, we recommend DEXA as objective method of nutritional examination. In future, more precise method will be discovered, and that contribute more long-term survival of chronic renal failure patients.