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실험적 신질환 : 실험적 당뇨 백서에서 proteasome inhibitor인 Bortezomib의 세포외 기질 축적에 대한 효과
강이화 ( Ea Wha Kang ),한승혁 ( Seung Hyeok Han ),최영춘 ( Ying Chun Cui ),정동섭 ( Dong Sub Jung ),이금희 ( Jin Ji Li ),이순하 ( Sun Ha Lee ),김승혜 ( Seung Hye Kim ),곽승재 ( Seung Jae Kwak ),박제현 ( Je Hyun Park ),유태현 ( Tae 대한신장학회 2008 춘계학술대회 초록집 Vol.28 No.1
( Shin Chan Kang ),( Hyung Woo Kim ),( Tae Ik Chang ),( Ea Wha Kang ),( Beom Jin Lim ),( Jung Tak Park ),( Tae-hyun Yoo ),( Hyeon Joo Jeong ),( Shin-wook Kang ),( Seung Hyeok Han ) 대한내과학회 2021 The Korean Journal of Internal Medicine Vol.36 No.5
Background/Aims: Despite controversy regarding the benefits of immunosuppressive therapy in immunoglobulin A nephropathy (IgAN), clinical outcomes may vary depending on the patient’s responsiveness to this therapy. This study evaluated long-term kidney outcomes according to the extent of proteinuria reduction after immunosuppression in IgAN patients. Methods: Among 927 patients with biopsy-proven IgAN, 127 patients underwent immunosuppression. Time-averaged urine protein-creatinine ratio before and within 1 year after start of immunosuppression were calculated, and responsiveness to immunosuppression was assessed as the reduction of proteinuria between the two periods. Patients were classified into tertiles according to the extent of proteinuria reduction. We compared the slopes of estimated glomerular filtration rate (eGFR) decline using a linear mixed model, and estimated hazard ratios (HRs) for disease progression (defined as development of a ≥ 30% decline in eGFR or end-stage renal disease) using a Cox proportional hazard model. Results: Median extent of proteinuria reduction was -2.1, -0.9, and -0.2 g/gCr in the first, second, and third tertiles, respectively. There were concomitant changes in the slopes of annual eGFR decline: -2.03, -2.44, and -4.62 mL/min/1.73 ㎡ among the first, second, and third tertiles, respectively. In multivariable Cox analysis, the HRs (95% confidence intervals) for disease progression were 0.30 (0.12 to 0.74) in the first tertile and 0.70 (0.34 to 1.45) in the second tertile compared with the thirdtertile. Conclusions: This study showed that greater proteinuria reduction after immunosuppression was associated with a lower risk of disease progression in patients with IgAN, suggesting that responsiveness to immunosuppression may be an important determinant of kidney outcomes.
( Kyoung Sook Park ),( Ea Wha Kang ),( Tae Ik Chang ),( Wonji Jo ),( Jung Tak Park ),( Tae-hyun Yoo ),( Shin-wook Kang ),( Seung Hyeok Han ) 대한신장학회 2021 Kidney Research and Clinical Practice Vol.40 No.3
Background: The use of newly developed mixed-dilution hemodiafiltration (HDF) can supplement the weaknesses of pre- and postdi-lution HDF. However, it is unclear whether mixed-HDF performs well compared to predilution HDF. Methods: We conducted a prospective, open-labeled, randomized controlled trial from two hemodialysis centers in Korea. Between January 2017 and September 2019, 60 patients who underwent chronic hemodialysis were randomly assigned at a 1:1 ratio to re-ceive either predilution HDF (n = 30) or mixed-HDF (n = 30) for 6 months. We compared convection volume, changes in small- and medium-sized molecule clearance, high-sensitive C-reactive protein (hs-CRP) level, and dialysis-related parameters between the two dialysis modalities. Results: A mean effective convection volume of 41.0 ± 10.3 L/session in the predilution HDF group and 51.5 ± 9.0 L/session in the mixed-HDF group was obtained by averaging values of three time-points. The difference in effective convection volume between the groups was 10.5 ± 1.3 L/session. This met the preset noninferiority criteria, suggesting that mixed-HDF was noninferior to predilution HDF. Moreover, the β2-microglobulin reduction rate was greater in the mixed-HDF group than in the predilution HDF group, while mixed-HDF provided greater transmembrane pressure. There were no significant between-group differences in Kt/V urea levels, changes in predialysis hs-CRP levels, proportions of overhydration, or blood pressure values. Symptomatic intradialytic hypotension episodes and other adverse events occurred similarly in the two groups. Conclusion: Use of mixed-HDF was comparable to predilution HDF in terms of delivered convection volume and clinical parameters. Moreover, mixed-HDF provided better β2-microglobulin clearance than predilution HDF.
( Kyoung Sook Park ),( Jung Hyun Chang ),( Ea Wha Kang ) 대한신장학회 2018 Kidney Research and Clinical Practice Vol.37 No.1
This report describes the case of a hypertensive 51-year-old male with a 3-year history of peritoneal dialysis. We followed the patient through his diagnosis of severe obstructive sleep apnea (OSA) and treatment with continuous positive airway pressure (CPAP). Therapeutic use of CPAP led to the improvement of not only sleep-related problems, but also cognitive function and quality of life. To our knowledge, this is the first paper describing the benefits of longterm CPAP treatment in an OSA patient undergoing dialysis. This case report emphasizes the need for the proactive diagnosis and treatment of OSA in end-stage renal disease patients to improve patient-centered healthcare.
Han, Seung Hyeok,Lee, Sang Choel,Kang, Ea Wha,Park, Jung Kyung,Yoon, Hyang Sook,Yoo, Tae-Hyun,Choi, Kyu Hun,Han, Dae-Suk,Kang, Shin-Wook SAGE Publications 2012 Peritoneal dialysis international Vol.32 No.2
<B>♦Background</B><P> Endothelial dysfunction, which contributes to atherosclerosis and arteriosclerosis, commonly accompanies end-stage renal disease (ESRD). However, little is known about the role of residual renal function (RRF) in endothelial protection in ESRD patients. This study aimed to investigate the relationship between endothelial function and RRF in patients undergoing peritoneal dialysis (PD). </P><B>♦Methods</B><P> This was a cross-sectional study involving 72 prevalent PD patients. Demographic and clinical data were recorded and residual glomerular filtration rate (GFR), Kt/V urea, and serum concentrations of inflammatory markers were measured. Endothelial function was assessed by brachial artery endothelium-dependent vasodilation [flow-mediated dilation (FMD)] to reactive hyperemia following 5 minutes of forearm ischemia. </P><B>♦Results</B><P> In patients with FMD% above the median value (FMD @@>@@ 2.41%), residual GFR was significantly higher compared to that in patients with FMD% below the median [1.50 (0 - 9.64) vs 0.48 (0 - 3.89) mL/min/1.73 m<SUP> 2</SUP>, P = 0.026]. Correlation analyses revealed that residual GFR (p = 0.381, P = 0.001) and total Kt/V urea (γ= 0.408, P @@<@@ 0.001) were positively correlated with FMD%, whereas PD duration (γ = -0.351, P = 0.003), high-sensitivity C-reactive protein (p = -0.345, P = 0.003), pulse pressure (γ = -0.341, P = 0.003), and age (γ = -0.403, P @@<@@ 0.001) were inversely correlated with FMD%. In contrast, there was no correlation between peritoneal Kt/V urea and FMD%. In multivariate linear regression analysis adjusted for these factors, residual GFR was found to be an independent determinant of FMD% (β = 0.317, P = 0.017). </P><B>♦ Conclusion</B><P> This study shows that RRF is independently associated with endothelial dysfunction in ESRD patients on PD, suggesting that RRF may contribute to endothelial protection in these patients. </P>
구영석(Young Suck Goo),강이화(Ea Wha Kang),이상철(Sang Cheol Lee),한승혁(Seung Hyeok Han),경희두(Hee Doo Kyung),정재헌(Jae Hun Jung),윤수영(Soo Young Yoon),최소래(So Rae Choi),노현정(Hyun Jung Roh),박형천(Hyeong Cheon Park),강신욱(Sh 대한신장학회 2001 Kidney Research and Clinical Practice Vol.20 No.5
목 적 : 선택적 단백뇨지수(selective proteinuria index , SPI)는 신증후군 환자의 조직학적 변화 및 스테로이드 치료에 대한 반응을 알 수 있는 예후인자로 알려져 있다. 단백뇨를 보이는 IgA 신증 환자에서 사구체 기저막의 음전하 소실이 나타나고, 신기능이 저하된 IgA 신증 환자에서 안지오텐신 전환효소 억제제가 비선택적 공(pore)의 반경을 감소시키는 것으로 보고되고 있어 선택적 단백뇨지수의 개념을 적용할 수 있다. 또한 신증후군 환자에서 선택적 단백뇨지수가 사구체 손상 뿐만 아니라 세뇨관간질의 손상 정도를 반영하는 것으로 알려져 있고, IgA 신증의 예후가 사구체경화와 세뇨관간질의 손상 정도와 밀접한 관련이 있는 것으로 보고되고 있어 IgA 신증 환자에서 선택적 단백뇨지수가 사구체와 세뇨관간질의 손상 정도를 반영할 수 있을 것으로 생각하였다. 본 연구는 IgA 신증에서 선택적 단백뇨지수와 다른 예후인자들의 연관성을 살펴보고, 선택적 단백뇨지수가 예후인자로서 의미가 있는지 알아보고자 하였다. 방 법 : 1990년 1월부터 2000년 1월까지 연세의료원에 내원하여 신장 조직 검사로 IgA 신증을 진단 받은 환자들 중 진단 당시에 신기능이 정상이었으며, 24시간 소변검사와 선택적 단백뇨지수를 측정한 81명을 대상으로 후향적으로 분석하였다. 환자들을 선택적 단백뇨지수 정도에 따라 고선택성(SPI≤0.1, n =6), 중등도 선택성(0.1< SPI≤0.2, n =33), 비선택성(SPI> 0.2, n =42)군으로 나누어 임상 소견과 신부전의 발생 차이를 비교하였다. Kaplan - Meier 생존곡선을 이용하여 예후인자에 따른 신부전의 발생 차이를 알아보기 위해 혈청 크레아티닌이 1.5 mg/ dL 이상이고 진단 당시보다 혈청 크레아티닌이 2배 이상 증가한 경우를 신부전으로 정의하였다. 또한 IgA 신증에서 신증후군을 보인 28명을 대상으로 선택적 단백뇨지수에 따른 스테로이드나 세포 독성 약물 치료의 반응을 살펴보았다. 결 과 : 1) 선택적 단백뇨지수에 따라 분류한 세군에서 24시간 단백뇨(0.52±0.35, 1.85±1.55, 2.79±2.51 g/ day, p<0.05), 고혈압(0, 4, 11명, p< 0.05), Haas 분류법(Ⅰ+Ⅱ : 5명, 21명, 6명, Ⅲ : 1명, 9명, 13명, Ⅳ+Ⅴ : 0명, 3명, 23명, 각각 고선택성, 중등도 선택성, 비선택성, p=0.01)은 의미 있는 차이를 보였다. 그러나 연령, 성별, 추적관찰 기간, 혈뇨, 24시간 크레아티닌 청소율, 혈청 크레아티닌은 세군간에 통계학적인 차이가 없었다. 2) Cox의 비례위험 회귀모형으로 분석하였을 경우, 신부전으로의 진행은 혈청 크레아티닌 (Exp (B)=4.2, p<0.001), 24시간 크레아티닌 청소율(Exp (B)=2.1, p<0.05), 선택적 단백뇨지수 (Exp (B)=1.7, p<0.05), 고혈압(Exp (B)=1.6, p<0.05)과 연관이 있었다. 3) IgA 신증에서 신증후군 소견을 보인 환자는 28명으로 고선택성 단백뇨군에서는 신증후군의 발생이 없었다. 약물 치료 결과는 중등도 선택성 단백뇨군에서 신증후군 양상을 보인 9명 중 N/A
Low serum bicarbonate predicts residual renal function loss in peritoneal dialysis patients
( Cheol Ho Park ),( Hyung Woo Kim ),( Ea Wha Kang ),( Tae Ik Chang ) 대한내과학회 2015 대한내과학회 추계학술대회 Vol.2015 No.1
Background and Aims: Low residual renal function (RRF) and serum bicarbonate are associated with adverse outcomes in peritoneal dialysis (PD) patients. However, a relationship between the two has not yet been determined in these patients. Therefore, this study aimed to investigate whether low serum bicarbonate has a deteriorating effect on RRF in PD patients. Methods: This prospective observational study included a total of 405 incident patients who started PD between January 2,000 and December 2005. We determined risk factors for complete loss of RRF using competing risk methods and evaluated the effects of time-averaged serum bicarbonate (TA-Bic) on the decline of RRF over the first 3 years of dialysis treatment using generalized linear mixed models. Results: During the first 3 years of dialysis, 95 (23.5%) patients became anuric. The mean time until patients became anuric was 20.8 ± 9.0 months. After adjusting for multiple potentially confounding covariates, an increase in TA-Bic level was associated with a significantlydecreased risk of loss of RRF (HR per 1 mEq/L increase, 0.84; 0.75 to 0.93; p=0.002), and in comparison to TA-Bic ≥ 24 mEq/L, TA-Bic<24 mEq/L conferred a 2.62-fold higher risk of becoming anuric. Furthermore, the rate of RRF decline estimated by generalized linear mixed models was significantly greater in patients with TA-Bic<24 mEq/L compared with those with TA-Bic ≥ 24 mEq/L (-0.16 vs-0.11 mL/min/month/1.73 m2, p<0.001). Conclusions: In this study, a clear association was found between low serum bicarbonate and loss of RRF in PD patients. Nevertheless, whether correction of metabolic acidosis for this indication provides additional protection for preserving RRF in these patients is unknown. Future interventional studies should more appropriately address this question.
호산구증다증을 동반한 P-ANCA 양성 괴사성 사구체신염
신장열 ( Jang Yel Shin ),강이화 ( Ea Wha Kang ),류동렬 ( Dong Ryeol Ryu ),송정식 ( Jung Sik Song ),이원기 ( Won Ki Lee ),박용범 ( Yong Beom Park ),김루시아 ( Lucia Kim ),정현주 ( Heun Ju Jung ),이수곤 ( Soo Kon Lee ) 대한류마티스학회 2000 대한류마티스학회지 Vol.7 No.1
Antineutrophil cytoplasmic antibodies (ANCAs) are now regarded as a serologic marker for pauci-immune crescentic necrotizing glomerulonephritis either in renal-limited form or in association with systemic vasculitis, such as Wegener`s granulomatosis, microscopic polyarteritis, and Churg-Strauss syndrome. Two major ANCA antigens have been indentified: proteinase3, which produces a cytoplasmic staining pattern termed C-ANCA, and myeloperoxidase, which produces a perinuclear pattern termed P-ANCA on ethanol-fixed neutrophils by indirect immunofluorescence. In ANCA- associated diseases, eosinphilia in excess of 1.5×10(9)/L has been proposed to be characteristic of Churg-Strauss syndrome and is rare in other forms of ANCA-associated systemic vasculitis and crescentic necrotizing glomerulonephritis. Recently, there were two cases of P-ANCA positive crescentic necrotizing glomerulonephritis with peripheral blood eosinophilia and extrarenal microscopic vasculitis without asthma or granulomas. We experienced a patient with P-ANCA positive pauci-immune necrotizing glomerulonephritis with few eosinophilic infiltration and eosinophilia. He improved with oral prednisolone along with combination of intravenous cyclophosphamide. So we report this case with the review of literature.