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Unboxing iBox: A Critical Appraisal of Its Measurement Properties for Predicting Kidney Allograft Failure Unboxing iBox:对其预测同种异体肾移植失败的测量特性的关键评价
IF 3.4 Q1 UROLOGY & NEPHROLOGY Pub Date : 2025-11-06 DOI: 10.1016/j.xkme.2025.101180
Christie Rampersad
Accurate prediction of kidney allograft failure is key to guiding posttransplant care and stratifying trial participants. The iBox model estimates death-censored graft failure risk at 3, 5, and 7 years posttransplant using demographic, functional, immunologic, and histologic variables. It has been externally validated and to our knowledge, is the first transplant risk score to receive regulatory qualification as a surrogate trial endpoint.
This narrative review critically appraises iBox using the Kirschner and Guyatt framework for clinical indices and Steyerberg’s framework for predictive models. iBox demonstrates strong sensibility, excellent discrimination (C-index ∼0.81), good calibration, and robust performance across known subgroups. Criterion and construct validity are strong, although several aspects warrant further exploration to support broader implementation. Item reduction and model selection methods were not fully detailed, and key inputs such as biopsy findings and donor-specific antibody levels may vary in availability or be subject to measurement challenges. Some predictors reflect late-stage pathology, which may limit opportunities for early intervention. Formal evaluation of reliability, responsiveness, and interpretability—particularly for longitudinal score changes—remains an important area for future research.
By systematically assessing iBox’s measurement properties, this review supported its thoughtful implementation and highlighted future research priorities as iBox is integrated into posttransplant care and trial design.
准确预测同种异体肾移植衰竭是指导移植后护理和对试验参与者进行分层的关键。iBox模型使用人口统计学、功能学、免疫学和组织学变量估计移植后3年、5年和7年死亡审查的移植物衰竭风险。它已经过外部验证,据我们所知,是第一个获得监管机构资格的移植风险评分作为替代试验终点。这篇叙述性评论批判性地评价了iBox,使用Kirschner和Guyatt的临床指标框架和Steyerberg的预测模型框架。iBox在已知亚群中表现出很强的灵敏度、出色的辨别能力(c指数~ 0.81)、良好的校准和稳健的性能。标准和结构的效度很强,尽管有几个方面需要进一步探索以支持更广泛的实施。项目减少和模型选择方法不完全详细,关键输入,如活检结果和供体特异性抗体水平可能在可用性方面有所不同或受到测量挑战。一些预测指标反映了晚期病理,这可能限制了早期干预的机会。对可靠性、反应性和可解释性的正式评估——特别是对纵向得分变化的评估——仍然是未来研究的一个重要领域。通过系统地评估iBox的测量特性,本综述支持其深思熟虑的实施,并强调了未来的研究重点,因为iBox被整合到移植后护理和试验设计中。
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引用次数: 0
Implementing the Acute Kidney Injury in Care Transitions (ACT) Program: Results From a Mixed Methods Feasibility Study 在护理过渡中实施急性肾损伤(ACT)计划:来自混合方法可行性研究的结果
IF 3.4 Q1 UROLOGY & NEPHROLOGY Pub Date : 2025-11-06 DOI: 10.1016/j.xkme.2025.101178
Heather P. May , Caroline B. Ledet , Joan M. Griffin , Joseph R. Herges , Kianoush B. Kashani , Andrea G. Kattah , Rozalina G. McCoy , Angeliki G. Tinaglia , Andrew D. Rule , Erin F. Barreto , ACT Study
<div><h3>Rationale & Objective</h3><div>Acute kidney injury (AKI) survivors are at risk for not receiving necessary follow-up medical care after discharge. This study assessed feasibility and acceptability of a multidisciplinary AKI survivor care delivery model (AKI in care transitions, ACT).</div></div><div><h3>Study Design</h3><div>Embedded convergent mixed methods study within a randomized trial.</div></div><div><h3>Setting & Participants</h3><div>The trial was conducted at a single academic medical center. Included individuals had stage 3 AKI during a hospitalization and were discharged to home and not on dialysis or were health care staff delivering ACT’s components.</div></div><div><h3>Analytical Approach</h3><div>Descriptive analysis of surveys and themes from qualitative interviews was integrated using embedding.</div></div><div><h3>Results</h3><div>Surveys were completed by 19 patients and 10 health care staff. Ten patients and 13 health care staff were interviewed. More than 80% of health care staff agreed ACT was feasible and acceptable, and 95% of patients would recommend ACT to others. The multidisciplinary approach, including pharmacists and nurses, and numerous kidney health touchpoints throughout care transitions were met with enthusiasm. Smooth integration of workflows and care elements with existing practices promoted acceptability. Developing efficient workflows to facilitate timely hospital discharge remains a priority. The diffuse and heterogenous nature of AKI and deprioritization of kidney health, relative to other disease states, represent challenges for ACT and similar programs.</div></div><div><h3>Limitations</h3><div>Data was collected from willing trial participants within a well-resourced health care system. Health systems’ specific needs should be evaluated when generalizing results.</div></div><div><h3>Conclusions</h3><div>The unique needs of patients and health care contexts call for flexible solutions to bridge the post-AKI care gap. The ACT intervention was designed with a small footprint to address previously identified patient priorities, leverage principles of minimally disruptive medicine, and engage the multidisciplinary health care team to minimize sole reliance on specialist resources. This mixed methods data indicates feasibility and broad acceptability and engagement with the approach.</div></div><div><h3>Plain-Language Summary</h3><div>This study evaluated a new program (acute kidney injury in care transitions) to improve care for acute kidney injury survivors after hospital discharge. The program used a multidisciplinary team (primary care providers, nurses, and pharmacists) to provide multiple points of contact focused on kidney health. Surveys and interviews with patients and staff showed high feasibility and acceptability (over 80% of staff and 95% of patients approved). Key benefits included a multidisciplinary approach and convenient integration into existing workflows. Challenges included
理由和目的急性肾损伤(AKI)幸存者在出院后没有得到必要的后续医疗护理的风险较大。本研究评估了多学科AKI幸存者护理交付模型(AKI in care transitions, ACT)的可行性和可接受性。研究设计:随机试验中的融合混合方法研究。背景和参与者本试验在单一的学术医疗中心进行。纳入住院期间患有3期AKI的个人,出院回家,没有透析,或者是提供ACT成分的卫生保健人员。分析方法采用嵌入法对调查和定性访谈的主题进行描述性分析。结果对19名患者和10名医护人员进行了问卷调查。访谈了10名患者和13名保健工作人员。80%以上的医护人员认为ACT是可行和可接受的,95%的患者会向他人推荐ACT。多学科的方法,包括药剂师和护士,以及许多肾脏健康接触点在整个护理过渡受到了热烈的欢迎。工作流和护理元素与现有实践的顺利集成提高了可接受性。制定有效的工作流程以促进及时出院仍然是一个优先事项。相对于其他疾病状态,AKI的弥漫性和异质性以及肾脏健康的不优先性对ACT和类似项目构成了挑战。数据是从资源充足的卫生保健系统中自愿的试验参与者中收集的。在推广结果时,应评估卫生系统的具体需求。结论患者的独特需求和卫生保健环境需要灵活的解决方案来弥合aki后的护理差距。ACT干预措施的设计占地面积小,以解决先前确定的患者优先事项,利用最小破坏性医学原则,并让多学科卫生保健团队参与,以最大限度地减少对专科资源的单独依赖。这种混合的方法数据表明可行性和广泛的可接受性和参与的方法。本研究评估了一个新的项目(急性肾损伤护理过渡),以改善急性肾损伤幸存者出院后的护理。该项目使用了一个多学科团队(初级保健提供者、护士和药剂师)来提供关注肾脏健康的多个接触点。对患者和工作人员的调查和访谈显示出较高的可行性和可接受性(超过80%的工作人员和95%的患者认可)。主要的好处包括多学科方法和方便地集成到现有的工作流程中。挑战包括急性肾损伤的不同性质,以及与其他疾病相比,肾脏健康往往受到的重视程度较低。研究表明,急性肾损伤在护理过渡是一个有前途的模式,但其适应不同的卫生保健环境需要进一步研究。
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引用次数: 0
Rifampin-induced Acute Kidney Injury Is Associated With Hemolysis and Drug Re-exposure 利福平引起的急性肾损伤与溶血和药物再暴露有关
IF 3.4 Q1 UROLOGY & NEPHROLOGY Pub Date : 2025-11-04 DOI: 10.1016/j.xkme.2025.101165
Junaid A. Wali , Yaseen A. Jamal , Mustafa Al-Kawaaz , Graham Rodwell , Megan L. Troxell

Rationale & Objective

Acute kidney injury and hemolysis are rare side effects of rifampin that are sometimes linked with drug re-exposure. We studied this association in a contemporary patient cohort to comprehensively correlate the clinical, laboratory, and biopsy findings.

Study Design

Adult patients who underwent kidney biopsy for acute kidney injury while on rifampin during an 11-year period (2012-2023) were identified. Electronic medical records and biopsy pathology were correlated.

Setting & Participants

Eighteen patients (50% men, ages 43-81) were prescribed rifampin for active pulmonary tuberculosis (7), latent tuberculosis (3), Mycobacterium avium complex infection (4), septic arthritis (3), and Bartonella endocarditis (1). Nine patients had prior rifampin exposure.

Results

Patients most commonly presented with gastrointestinal and ‘flu-like’ symptoms, 1 day to 1 month after rifampin (re-)exposure. Creatinine at biopsy was 2.2-26.1 mg/dL. Importantly, 15 patients had evidence of hemolysis. All biopsies demonstrated acute tubular injury, yet inflammation (acute interstitial nephritis) was variable. Eleven had pigmented casts, 9 with hemoglobin and 2 with myoglobin. Thus, we highlight acute tubular necrosis with hemoglobin casts as a major finding in rifampin kidney injury. Management included supportive care, steroids, and discontinuation of rifampin. Eleven patients required hemodialysis. Fifteen patients had complete renal remission.

Limitations

Retrospective case series without uniformly available clinical and laboratory data.

Conclusions

Hemolytic anemia, hemoglobin cast nephropathy, and acute kidney injury are rare but serious complications of rifampin. Clinicians and patients should be aware of this side effect, and interrupted use of rifampin therapy should be avoided.

Plain-language Summary

Rifampin (also known as rifampicin; brand name Rifadin) is an important antibiotic medication in treating infection, particularly tuberculosis. Rifampin can very rarely cause serious side effects, especially in patients who have taken rifampin previously. We identified 18 patients with kidney injury and kidney biopsy shortly after rifampin (re-)exposure and found that 15 had hemolysis (destruction of red blood cells), most with systemic illness. We found evidence of hemolysis-related casts causing kidney injury in 9 kidney biopsies. Patients and clinicians should be very cautious with rifampin re-exposure, and patients should seek medical attention for malaise, flu-like symptoms, fever, chills, nausea, vomiting, diarrhea, jaundice, decreased urine output, and dark urine.
理由和目的急性肾损伤和溶血是利福平罕见的副作用,有时与药物再暴露有关。我们在当代患者队列中研究了这种关联,以全面关联临床、实验室和活检结果。研究设计确定了11年期间(2012-2023年)服用利福平期间因急性肾损伤接受肾活检的成年患者。电子病历与活检病理有相关性。18例患者(50%为男性,年龄43-81岁)使用利福平治疗活动性肺结核(7例)、潜伏性肺结核(3例)、鸟分枝杆菌复合感染(4例)、感染性关节炎(3例)和巴尔通体心内膜炎(1例)。9例患者既往有利福平暴露。结果患者在利福平(再)暴露后1天至1个月最常出现胃肠道和“流感样”症状。活检时肌酐为2.2 ~ 26.1 mg/dL。重要的是,15例患者有溶血的证据。所有活检显示急性肾小管损伤,但炎症(急性间质性肾炎)是可变的。11例为色素铸型,9例为血红蛋白铸型,2例为肌红蛋白铸型。因此,我们强调急性肾小管坏死伴血红蛋白铸型是利福平肾损伤的主要发现。治疗包括支持治疗、类固醇和停用利福平。11例患者需要血液透析。15例患者肾脏完全缓解。局限性:没有统一的临床和实验室数据的回顾性病例系列。结论溶血性贫血、血红蛋白铸造肾病、急性肾损伤是利福平罕见但严重的并发症。临床医生和患者应意识到这一副作用,并应避免中断使用利福平治疗。利福平(又称利福平;品牌名利福定)是一种重要的抗生素药物,用于治疗感染,特别是结核病。利福平很少会引起严重的副作用,特别是对于以前服用过利福平的患者。我们确定了18例在利福平(再)暴露后不久发生肾损伤和肾活检的患者,发现15例发生溶血(红细胞破坏),大多数患有全体性疾病。我们在9例肾活检中发现溶血相关铸型引起肾损伤的证据。患者和临床医生对再次接触利福平应非常谨慎,当出现不适、流感样症状、发热、寒战、恶心、呕吐、腹泻、黄疸、尿量减少和尿色变深时,应就医。
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引用次数: 0
Assisted Peritoneal Dialysis: A Feasibility and Quality Improvement Project 辅助腹膜透析:一个可行性和质量改进项目
IF 3.4 Q1 UROLOGY & NEPHROLOGY Pub Date : 2025-11-04 DOI: 10.1016/j.xkme.2025.101173
Hyunji Kim , Mary Nguyen , Page Salenger , Amanda Tran , Shelly Seidel , Daniel E. Weiner , Klemens B. Meyer , Caroline M. Hsu
Despite often offering a better quality of life than in-center hemodialysis, peritoneal dialysis (PD) at home can be challenging for many. From May 2021 to October 2024, we offered PD assistance at 2 home dialysis clinics in Dialysis Clinic, Inc, a mid-size national dialysis provider. Eligible patients could be incident to or established on PD, with anticipated need for either permanent or temporary assistance. Over 3 years, 6 patients received assisted PD. Three established PD patients needed assistance when their care partners were unavailable. Three other patients required assistance to initiate PD. Assistance duration ranged from 1 day to 5 months. Three patients ultimately transitioned to PD independence, and 3 transferred to in-center hemodialysis. Our greatest challenge was hiring assistants for unpredictable work with odd hours, and we eventually hired 2 postbaccalaureate students preparing for medical careers. Our successes, minimal missed treatments, and a high rate of PD continuation are a testament to their dedication. Assisted PD programs would benefit from economies of scale by being embedded in the health care system. As interest in assisted PD grows, we advocate for sharing of programs’ successes and challenges so that we may together learn how to enable assisted PD in the US.
尽管通常比中心血液透析提供更好的生活质量,但在家进行腹膜透析(PD)对许多人来说是具有挑战性的。从2021年5月到2024年10月,我们在中型国家透析提供商透析诊所公司的2家家庭透析诊所提供PD协助。符合条件的患者可能是偶然的或已经建立的PD,预计需要永久或临时援助。3年多来,6例患者接受了辅助PD治疗。三名PD患者在护理伙伴不在时需要帮助。另外三名患者需要协助启动PD。援助时间由1天至5个月不等。3例患者最终过渡到PD独立性,3例转移到中心血液透析。我们最大的挑战是在不规律的工作时间雇佣助理,我们最终雇佣了2名准备从事医学职业的本科毕业学生。我们的成功,最小的遗漏治疗,以及PD的高延续率证明了他们的奉献精神。辅助PD计划将通过嵌入医疗保健系统而受益于规模经济。随着人们对辅助PD的兴趣不断增长,我们提倡分享项目的成功和挑战,以便我们可以共同学习如何在美国实现辅助PD。
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引用次数: 0
Osmotic Nephropathy Induced by L-Proline Stabilized Sucrose-free Intravenous Immunoglobulins: A Case Report l -脯氨酸稳定无蔗糖免疫球蛋白致渗透性肾病1例报告
IF 3.4 Q1 UROLOGY & NEPHROLOGY Pub Date : 2025-11-04 DOI: 10.1016/j.xkme.2025.101172
Antonio Ulpiano Trillig , Samuel Rotman , Patricia Mehier , Alain Rossier , Gérard Vogel
Acute kidney injury following sucrose-free intravenous immunoglobulins (IVIG) is rare. We report the case of a 67-year-old male who developed a sudden anuric acute kidney injury at day 4 of L-proline stabilized sucrose-free IVIG for a Guillain-Barré Syndrome. The IVIG treatment was halted. The patient did not require renal replacement therapy after an adequate response to diuretics. Amoxicillin was the sole other potential nephrotoxic. The kidney biopsy showed typical features of osmotic nephropathy (ON). Although a certain degree of kidney hypoxia due to dysautonomia and variations of blood pressure might have occurred, histological findings were not compatible with an ischemic acute tubular necrosis. There was no glomerular and vascular involvement. Immunofluorescence of tubular cells cytoplasm was negative, ruling out antibody deposition. The patient had a complete renal recovery after 2 weeks. We hypothesize that proline itself acted as a reabsorbed toxic solute and accumulated in the lysosomes, leading to ON. In this case report we discuss the proline proximal tubular transport, involving pinocytosis in case of high concentration in the filtrate, and potential mechanisms involved in the development of ON.
静脉注射无蔗糖免疫球蛋白(IVIG)后急性肾损伤是罕见的。我们报告一例67岁男性患者,因吉兰-巴罗综合征,在接受l -脯氨酸稳定无蔗糖IVIG治疗的第4天出现突发性无尿急性肾损伤。IVIG治疗停止了。在对利尿剂有充分反应后,患者不需要肾脏替代治疗。阿莫西林是唯一的其他潜在肾毒性药物。肾活检显示渗透性肾病(ON)的典型特征。虽然可能发生了由自主神经异常和血压变化引起的一定程度的肾缺氧,但组织学结果与缺血性急性肾小管坏死不相容。没有肾小球和血管受累。小管细胞细胞质免疫荧光阴性,排除抗体沉积。2周后患者肾脏完全恢复。我们假设脯氨酸本身作为一种重吸收的有毒溶质,在溶酶体中积累,导致ON。在本病例报告中,我们讨论脯氨酸近端小管运输,包括在滤液高浓度时的胞饮作用,以及参与ON发展的潜在机制。
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引用次数: 0
Time-Dependent Changes in Extracellular-to-Intracellular Water Ratios and Risk of All-Cause Mortality in Peritoneal Dialysis Patients: A Single-Center Retrospective Cohort Study 腹膜透析患者细胞外与细胞内水分比的时间依赖性变化和全因死亡率风险:一项单中心回顾性队列研究
IF 3.4 Q1 UROLOGY & NEPHROLOGY Pub Date : 2025-11-04 DOI: 10.1016/j.xkme.2025.101171
Huan-Nung Chao , Yi-Liang Tsai , Jhih-Wen Hsu , Ya-Chi Chan , Pei-Ni Chen , Chia-Lin Wu
<div><h3>Rationale & Objective</h3><div>Bioelectrical impedance spectroscopy (BIS) is a valuable tool for assessing body composition in patients on peritoneal dialysis (PD), as body composition can significantly change during long-term PD treatment. We aimed to clarify the relationship between time-dependent changes in the extracellular-to-intracellular water ratio (EIR) and all-cause mortality in patients undergoing long-term PD.</div></div><div><h3>Study Design</h3><div>A single-center, retrospective cohort study.</div></div><div><h3>Setting & Participants</h3><div>This study enrolled adult PD patients who underwent body composition measurements from our bioelectrical impedance spectroscopy-aided fluid management program from May 1, 2012, to April 30, 2023. Patients were followed up until death, withdrawal from PD, or the end of the study.</div></div><div><h3>Exposure</h3><div>EIR and its covariates.</div></div><div><h3>Outcomes</h3><div>All-cause mortality.</div></div><div><h3>Analytical Approach</h3><div>Time-dependent Cox proportional hazards, restricted cubic splines, and propensity score matching analyzed risk factors and mortality.</div></div><div><h3>Results</h3><div>Among the 468 PD patients, the median follow-up period was 2.0 (interquartile range [IQR] 0.6-4.3) years. Three distinct temporal EIR trajectories are found after grouping baseline EIR (bEIR) into quartiles (<em>P</em><sub><em>interaction</em></sub> < 0.001). Additionally, the optimal cutoff value of bEIR for predicting survival was 0.87. A high bEIR (≥0.87) was associated with a greater risk of mortality than a low bEIR (<0.87, crude hazard ratio, 6.095; <em>P</em> < 0.001). The multivariable time-dependent Cox model showed that the risk of mortality increased by nearly 50% for every 0.1 increase in the EIR (<em>P</em> < 0.001), without significant nonlinearity (<em>P</em> = 0.07). After propensity score matching, the EIR remained an important predictor of the risk of mortality.</div></div><div><h3>Limitations</h3><div>The study had a retrospective design.</div></div><div><h3>Conclusions</h3><div>The EIR, regarded as either a time-independent or time-dependent variable, is a crucial predictor of mortality in PD patients under regular monitoring of fluid status. Our results also suggest that an EIR of ≥0.87 would be a useful target for predicting the long-term mortality of PD patients in clinical practice.</div></div><div><h3>Plain-language Summary</h3><div>Fluid overload-induced cardiovascular disease has long been one of the leading causes of mortality in dialysis patients. In this study, we used time-dependent Cox proportional hazards regression analysis and found that the extracellular-to-intracellular water ratio (EIR), as measured by bioelectrical impedance spectroscopy, can predict the mortality risk in peritoneal dialysis patients. Over the course of dialysis, the bEIR quartile groups exhibited 3 distinct trajectories. Except for the fourth bEIR q
理由和目的生物电阻抗谱(BIS)是评估腹膜透析(PD)患者身体成分的一种有价值的工具,因为身体成分在长期腹膜透析(PD)治疗期间会发生显著变化。我们旨在阐明长期PD患者细胞外与细胞内水分比(EIR)随时间变化与全因死亡率之间的关系。研究设计:单中心、回顾性队列研究。背景和参与者本研究招募了2012年5月1日至2023年4月30日期间通过我们的生物电阻抗谱辅助流体管理项目进行身体成分测量的成年PD患者。对患者进行随访,直到死亡、PD戒断或研究结束。暴露率及其协变量。OutcomesAll-cause死亡率。分析方法:随时间变化的Cox比例风险、受限三次样条和倾向评分匹配分析了危险因素和死亡率。结果468例PD患者中位随访时间为2.0年(四分位间距0.6 ~ 4.3年)。在将基线EIR (bEIR)分组为四分位数后,发现了三个不同的时间EIR轨迹(p - interaction < 0.001)。此外,bEIR预测生存的最佳截止值为0.87。高bEIR(≥0.87)与低bEIR (<0.87,粗风险比,6.095;P < 0.001)相关的死亡风险更高。多变量时间相关Cox模型显示,EIR每增加0.1,死亡风险增加近50% (P < 0.001),无显著非线性(P = 0.07)。在倾向评分匹配后,EIR仍然是死亡风险的重要预测因子。局限性:本研究采用回顾性设计。结论EIR,被认为是一个时间无关或时间相关的变量,在定期监测液体状态下,是PD患者死亡率的重要预测指标。我们的研究结果还表明,在临床实践中,EIR≥0.87将是预测PD患者长期死亡率的有用目标。液体超载引起的心血管疾病一直是导致透析患者死亡的主要原因之一。在这项研究中,我们使用了时间依赖的Cox比例风险回归分析,发现生物电阻抗谱测量的细胞外与细胞内水比(EIR)可以预测腹膜透析患者的死亡风险。在透析过程中,bEIR四分位数组表现出3种不同的轨迹。除了第四个bEIR四分位数(Q4)组由于流体超载干预而出现初始EIR下降外,其他两组均呈上升趋势,其中第一个bEIR四分位数(Q1)组增幅最大。
{"title":"Time-Dependent Changes in Extracellular-to-Intracellular Water Ratios and Risk of All-Cause Mortality in Peritoneal Dialysis Patients: A Single-Center Retrospective Cohort Study","authors":"Huan-Nung Chao ,&nbsp;Yi-Liang Tsai ,&nbsp;Jhih-Wen Hsu ,&nbsp;Ya-Chi Chan ,&nbsp;Pei-Ni Chen ,&nbsp;Chia-Lin Wu","doi":"10.1016/j.xkme.2025.101171","DOIUrl":"10.1016/j.xkme.2025.101171","url":null,"abstract":"&lt;div&gt;&lt;h3&gt;Rationale &amp; Objective&lt;/h3&gt;&lt;div&gt;Bioelectrical impedance spectroscopy (BIS) is a valuable tool for assessing body composition in patients on peritoneal dialysis (PD), as body composition can significantly change during long-term PD treatment. We aimed to clarify the relationship between time-dependent changes in the extracellular-to-intracellular water ratio (EIR) and all-cause mortality in patients undergoing long-term PD.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Study Design&lt;/h3&gt;&lt;div&gt;A single-center, retrospective cohort study.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Setting &amp; Participants&lt;/h3&gt;&lt;div&gt;This study enrolled adult PD patients who underwent body composition measurements from our bioelectrical impedance spectroscopy-aided fluid management program from May 1, 2012, to April 30, 2023. Patients were followed up until death, withdrawal from PD, or the end of the study.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Exposure&lt;/h3&gt;&lt;div&gt;EIR and its covariates.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Outcomes&lt;/h3&gt;&lt;div&gt;All-cause mortality.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Analytical Approach&lt;/h3&gt;&lt;div&gt;Time-dependent Cox proportional hazards, restricted cubic splines, and propensity score matching analyzed risk factors and mortality.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Results&lt;/h3&gt;&lt;div&gt;Among the 468 PD patients, the median follow-up period was 2.0 (interquartile range [IQR] 0.6-4.3) years. Three distinct temporal EIR trajectories are found after grouping baseline EIR (bEIR) into quartiles (&lt;em&gt;P&lt;/em&gt;&lt;sub&gt;&lt;em&gt;interaction&lt;/em&gt;&lt;/sub&gt; &lt; 0.001). Additionally, the optimal cutoff value of bEIR for predicting survival was 0.87. A high bEIR (≥0.87) was associated with a greater risk of mortality than a low bEIR (&lt;0.87, crude hazard ratio, 6.095; &lt;em&gt;P&lt;/em&gt; &lt; 0.001). The multivariable time-dependent Cox model showed that the risk of mortality increased by nearly 50% for every 0.1 increase in the EIR (&lt;em&gt;P&lt;/em&gt; &lt; 0.001), without significant nonlinearity (&lt;em&gt;P&lt;/em&gt; = 0.07). After propensity score matching, the EIR remained an important predictor of the risk of mortality.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Limitations&lt;/h3&gt;&lt;div&gt;The study had a retrospective design.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Conclusions&lt;/h3&gt;&lt;div&gt;The EIR, regarded as either a time-independent or time-dependent variable, is a crucial predictor of mortality in PD patients under regular monitoring of fluid status. Our results also suggest that an EIR of ≥0.87 would be a useful target for predicting the long-term mortality of PD patients in clinical practice.&lt;/div&gt;&lt;/div&gt;&lt;div&gt;&lt;h3&gt;Plain-language Summary&lt;/h3&gt;&lt;div&gt;Fluid overload-induced cardiovascular disease has long been one of the leading causes of mortality in dialysis patients. In this study, we used time-dependent Cox proportional hazards regression analysis and found that the extracellular-to-intracellular water ratio (EIR), as measured by bioelectrical impedance spectroscopy, can predict the mortality risk in peritoneal dialysis patients. Over the course of dialysis, the bEIR quartile groups exhibited 3 distinct trajectories. Except for the fourth bEIR q","PeriodicalId":17885,"journal":{"name":"Kidney Medicine","volume":"8 1","pages":"Article 101171"},"PeriodicalIF":3.4,"publicationDate":"2025-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145787199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Cyclophosphamide Plus Rituximab Versus Cyclophosphamide in Antineutrophil Cytoplasmic Antibody–associated Vasculitis With Kidney Involvement: A Retrospective Cohort Study in China 环磷酰胺联合利妥昔单抗与环磷酰胺治疗累及肾脏的抗中性粒细胞细胞质抗体相关血管炎:一项中国回顾性队列研究
IF 3.4 Q1 UROLOGY & NEPHROLOGY Pub Date : 2025-11-03 DOI: 10.1016/j.xkme.2025.101169
Jiahui Wang , Xin Lei , Junni Wang, Wanyun Nie, Xiaohan Huang, Huanhuan Zhu, Liangliang Chen, Nan Shi, Yaomin Wang, Lan Lan, Pingping Ren, Jianghua Chen, Fei Han
<div><h3>Rationale & Objective</h3><div>Intravenous cyclophosphamide (CTX) or rituximab (RTX) combined with glucocorticoids are first-line therapies for antineutrophil cytoplasmic antibody–associated vasculitis (AAV). We aimed to compare the efficacy of CTX plus RTX and CTX alone, in combination with glucocorticoids, for AAV patients with kidney injury.</div></div><div><h3>Study Design</h3><div>Retrospective cohort study.</div></div><div><h3>Setting & Participants</h3><div>76 newly diagnosed AAV patients with kidney involvement, divided into glucocorticoids plus CTX group (control group, n = 36) and glucocorticoids plus CTX and RTX group (combination group, n = 40).</div></div><div><h3>Exposure</h3><div>CTX plus RTX or CTX alone, in combination with glucocorticoids.</div></div><div><h3>Outcomes</h3><div>Kidney failure, remission, death, combined events endpoint of kidney failure and/or death, relapse, and adverse events.</div></div><div><h3>Analytical Approach</h3><div>Unpaired <em>t</em> test, Mann-Whitney <em>U</em> test, Pearson χ<sup>2</sup> test or Fisher exact test, and Kaplan-Meier method with log-rank test.</div></div><div><h3>Results</h3><div>The median follow-up period was 29.7 (20.4-37.4) months. The remission rate was significantly higher in the combination group than in the control group at 6 months (85.0% vs 52.8%, <em>P</em> = 0.002). However, there were no significant differences in the remission rates at 12 months and at the final follow-up, as well as kidney failure, death, relapse, or improvement of renal function during follow-up between groups. The cumulative dose of glucocorticoids in the combination group was 2.5 (2.0-3.3) g at 6 months and 3.7 (2.6-4.8) g at the final follow-up, significantly lower than those in the control group (<em>P</em> < 0.001 and <em>P</em> < 0.001, respectively). In the subgroup of 45 patients with an estimated glomerular filtration rate of >15 mL/min/1.73 m<sup>2</sup> at admission, 7 of 21 patients in the control group and 1 of 24 patients in the combination group progressed to kidney failure (33.3% vs 4.2%, <em>P</em> = 0.02).</div></div><div><h3>Limitations</h3><div>Primarily Chinese, retrospective data.</div></div><div><h3>Conclusions</h3><div>The combination of glucocorticoids, CTX, and RTX is better in achieving early disease remission and reducing the dose of glucocorticoids for AAV patients.</div></div><div><h3>Plain-language Summary</h3><div>Several case series have reported the combined use of cyclophosphamide (CTX) and rituximab (RTX) in antineutrophil cytoplasmic antibody–associated vasculitis (AAV), which may decrease the cumulative dose of glucocorticoids. However, no study has compared the combined therapy of RTX and CTX with conventional therapy. In this study, we retrospectively analyzed 76 patients with new-onset AAV involving kidneys, who were treated with either a combination of glucocorticoids with CTX and RTX (combination therapy) or glucocorticoids with CTX.
目的:静脉注射环磷酰胺(CTX)或利妥昔单抗(RTX)联合糖皮质激素是抗中性粒细胞细胞质抗体相关血管炎(AAV)的一线治疗方法。我们的目的是比较CTX加RTX和单独CTX联合糖皮质激素治疗AAV肾损伤患者的疗效。研究设计回顾性队列研究。新诊断的AAV累及肾脏患者76例,分为糖皮质激素+ CTX组(对照组,n = 36)和糖皮质激素+ CTX + RTX组(联合组,n = 40)。暴露rectx加RTX或单独CTX,联合糖皮质激素。结果:肾功能衰竭、缓解、死亡、合并事件(肾功能衰竭和/或死亡)、复发和不良事件。分析方法:非配对t检验、Mann-Whitney U检验、Pearson χ2检验或Fisher精确检验、Kaplan-Meier法加log-rank检验。结果中位随访时间为29.7(20.4 ~ 37.4)个月。6个月时,联合治疗组的缓解率明显高于对照组(85.0% vs 52.8%, P = 0.002)。然而,在12个月和最后随访时的缓解率,以及随访期间肾功能衰竭、死亡、复发或肾功能改善方面,两组之间没有显著差异。联合组患者6个月时糖皮质激素累积剂量为2.5 (2.0-3.3)g,末次随访时为3.7 (2.6-4.8)g,均显著低于对照组(P <; 0.001和P <; 0.001)。在入院时肾小球滤过率估计为15 mL/min/1.73 m2的45例患者亚组中,对照组21例患者中有7例进展为肾衰竭,联合治疗组24例患者中有1例进展为肾衰竭(33.3% vs 4.2%, P = 0.02)。局限性:主要是中国的回顾性数据。结论糖皮质激素联合CTX和RTX治疗AAV患者在早期疾病缓解和减少糖皮质激素剂量方面效果较好。几个病例系列报道了联合使用环磷酰胺(CTX)和利妥昔单抗(RTX)治疗抗中性粒细胞细胞质抗体相关血管炎(AAV),这可能会降低糖皮质激素的累积剂量。然而,没有研究将RTX和CTX联合治疗与常规治疗进行比较。在这项研究中,我们回顾性分析了76例新发累及肾脏的AAV患者,这些患者接受糖皮质激素联合CTX和RTX(联合治疗)或糖皮质激素联合CTX治疗。在这项回顾性队列研究中,联合治疗在诱导AAV患者早期缓解和减少糖皮质激素剂量方面更有效。此外,它降低了AAV患者肾衰竭的发生率,入院时肾小球滤过率估计为15 mL/min/1.73 m2。
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引用次数: 0
Comment on “COVID-19 Hospitalization and Mortality Trends Among US Dialysis Patients by Race/Ethnicity and Vaccination Status” by Shieu et al 评论Shieu等人的“美国透析患者中按种族/民族和疫苗接种状况划分的COVID-19住院和死亡率趋势”
IF 3.4 Q1 UROLOGY & NEPHROLOGY Pub Date : 2025-11-01 DOI: 10.1016/j.xkme.2025.101154
Shu Yuan PhD , Zi-Lin Li MD , Jing Hu MD
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引用次数: 0
McCune-Albright Syndrome as a Rare Cause of Fanconi Syndrome and Kidney Failure: A Case Report and Literature Review 麦昆-奥尔布赖特综合征作为范可尼综合征和肾衰竭的罕见病因:1例报告和文献复习
IF 3.4 Q1 UROLOGY & NEPHROLOGY Pub Date : 2025-11-01 DOI: 10.1016/j.xkme.2025.101170
Geraldine Venessa Qian Le Boh , Hui-Lin Chin , Yao Chun Zhang , Ru Sin Lim
McCune-Albright syndrome (MAS) is a rare systemic genetic condition classically characterized by childhood-onset polyostotic fibrous dysplasia, café-au-lait skin pigmentation, and precocious puberty. Kidney involvement in MAS is infrequently recognized, particularly in low- and middle-income countries where genomic testing may be limited. We presented the first case report of MAS presenting with Fanconi syndrome and progressive kidney failure, which we postulated represents a phenotypic expansion of the renal phenotype associated with MAS, in addition to hyperthyroidism, osteoid osteoma, bone marrow failure secondary to fibrous dysplasia, and congenital ovarian failure. Initial renal biochemical evaluations were suggestive of proximal tubulopathy; however, secondary investigations were inconclusive. Seventeen years after the patient’s initial presentation, clinically accredited whole exome sequencing conducted under a national genomic research initiative identified a pathogenic GNAS variant (NM_000516:c.[602G>A];p.(Arg201His)), confirming a diagnosis of MAS. This is the first reported case of GNAS-associated Fanconi syndrome and kidney failure. We hypothesized that dysfunction of proximal tubule transporters may be related to elevated circulating cyclic adenosine monophosphate levels and selective expression of G protein-coupled receptors in the proximal tubule, mediated by a gain-of-function in the G-protein α subunit induced by the GNAS pathogenic variant.
麦库恩-奥尔布赖特综合征(MAS)是一种罕见的全身性遗传疾病,其典型特征是儿童期发病的多骨纤维发育不良,皮肤色素沉着和性早熟。MAS对肾脏的影响很少被认识到,特别是在基因组检测可能有限的低收入和中等收入国家。我们提出了第一例MAS的病例报告,其表现为范可尼综合征和进行性肾衰竭,我们认为除了甲状腺功能亢进、类骨性骨瘤、继发于纤维性发育不良的骨髓衰竭和先天性卵巢衰竭外,MAS还表现为肾脏表型的表型扩展。最初的肾脏生化评估提示近端小管病变;然而,二次调查尚无定论。在患者首次出现症状17年后,临床认可的全外显子组测序在国家基因组研究计划下进行,鉴定出一种致病性GNAS变体(NM_000516:c.[602G> a];p。(Arg201His)),证实了MAS的诊断。这是首次报道gnas相关范可尼综合征和肾衰竭的病例。我们假设近端小管转运蛋白的功能障碍可能与GNAS致病变异诱导的G蛋白α亚基功能获得介导的近端小管循环单磷酸腺苷水平升高和G蛋白偶联受体的选择性表达有关。
{"title":"McCune-Albright Syndrome as a Rare Cause of Fanconi Syndrome and Kidney Failure: A Case Report and Literature Review","authors":"Geraldine Venessa Qian Le Boh ,&nbsp;Hui-Lin Chin ,&nbsp;Yao Chun Zhang ,&nbsp;Ru Sin Lim","doi":"10.1016/j.xkme.2025.101170","DOIUrl":"10.1016/j.xkme.2025.101170","url":null,"abstract":"<div><div>McCune-Albright syndrome (MAS) is a rare systemic genetic condition classically characterized by childhood-onset polyostotic fibrous dysplasia, café-au-lait skin pigmentation, and precocious puberty. Kidney involvement in MAS is infrequently recognized, particularly in low- and middle-income countries where genomic testing may be limited. We presented the first case report of MAS presenting with Fanconi syndrome and progressive kidney failure, which we postulated represents a phenotypic expansion of the renal phenotype associated with MAS, in addition to hyperthyroidism, osteoid osteoma, bone marrow failure secondary to fibrous dysplasia, and congenital ovarian failure. Initial renal biochemical evaluations were suggestive of proximal tubulopathy; however, secondary investigations were inconclusive. Seventeen years after the patient’s initial presentation, clinically accredited whole exome sequencing conducted under a national genomic research initiative identified a pathogenic <em>GNAS</em> variant (NM_000516:c.[602G&gt;A];p.(Arg201His)), confirming a diagnosis of MAS. This is the first reported case of <em>GNAS</em>-associated Fanconi syndrome and kidney failure. We hypothesized that dysfunction of proximal tubule transporters may be related to elevated circulating cyclic adenosine monophosphate levels and selective expression of G protein-coupled receptors in the proximal tubule, mediated by a gain-of-function in the G-protein α subunit induced by the <em>GNAS</em> pathogenic variant.</div></div>","PeriodicalId":17885,"journal":{"name":"Kidney Medicine","volume":"8 1","pages":"Article 101170"},"PeriodicalIF":3.4,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145787278","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The Endothelial Glycocalyx: The First Line of Defense in the Prevention and Treatment of Kidney Diseases 内皮糖萼:预防和治疗肾脏疾病的第一道防线
IF 3.4 Q1 UROLOGY & NEPHROLOGY Pub Date : 2025-11-01 DOI: 10.1016/j.xkme.2025.101122
Xiaoyu Yuan , Mengzhen Jia , Li Zhou , Gailing Hou , Bing Zhang , Xinshou Ouyang , Yanjie Huang
The endothelial glycocalyx (EG) is widely located on the surface of endothelial cell membrane. It serves as an important component of the endothelial cell barrier and plays a crucial role in maintaining charge balance within the cell. The shedding, excessive thickening and deposition of the EG located on the surface of endothelial cells within the renal capillary network is widely observed in acute kidney injury and chronic kidney disease. Based on recent research advancements, this article focuses on how the EG in the renal microvasculature participates in pathological processes such as renal tubulointerstitial fibrosis, cross-talk between endothelial cells and epithelial cells, and immune system dysregulation. Preserving and restoring the integrity of the EG in the renal microvasculature has emerged as an innovative strategy for the early prevention and treatment of kidney diseases. This includes supplementation of EG components and inhibition of EG shedding ingredients to prevent EG damage.
内皮糖萼广泛分布于内皮细胞膜表面。它是内皮细胞屏障的重要组成部分,在维持细胞内电荷平衡方面起着至关重要的作用。肾毛细血管网内皮细胞表面EG的脱落、过度增厚和沉积在急性肾损伤和慢性肾脏疾病中广泛存在。基于近年来的研究进展,本文重点阐述了肾微血管中的EG参与肾小管间质纤维化、内皮细胞与上皮细胞间的串扰以及免疫系统失调等病理过程。保存和恢复肾微血管EG的完整性已成为早期预防和治疗肾脏疾病的一种创新策略。这包括补充EG成分和抑制EG脱落成分,以防止EG损伤。
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引用次数: 0
期刊
Kidney Medicine
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