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Ito Y, Ryuzaki M, Sugiyama H, Tomo T, Yamashita AC, Ishikawa Y, Ueda A, Kanazawa Y, Kanno Y, Itami N, Ito M, Kawanishi H, Nakayama M, Tsuruya K, Yokoi H, Fukasawa M, Terawaki H, Nishiyama K, Hataya H, Miura K, Hamada R, Nakakura H, Hattori M, Yuasa H, Nakamoto H. Peritoneal Dialysis Guidelines 2019 Part 1 (Position paper of the Japanese Society for Dialysis Therapy). RENAL REPLACEMENT THERAPY 2021. [DOI: 10.1186/s41100-021-00348-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
AbstractApproximately 10 years have passed since the Peritoneal Dialysis Guidelines were formulated in 2009. Much evidence has been reported during the succeeding years, which were not taken into consideration in the previous guidelines, e.g., the next peritoneal dialysis PD trial of encapsulating peritoneal sclerosis (EPS) in Japan, the significance of angiotensin-converting enzyme inhibitors (ACEIs) and angiotensin receptor blockers (ARBs), the effects of icodextrin solution, new developments in peritoneal pathology, and a new international recommendation on a proposal for exit-site management. It is essential to incorporate these new developments into the new clinical practice guidelines. Meanwhile, the process of creating such guidelines has changed dramatically worldwide and differs from the process of creating what were “clinical practice guides.” For this revision, we not only conducted systematic reviews using global standard methods but also decided to adopt a two-part structure to create a reference tool, which could be used widely by the society’s members attending a variety of patients. Through a working group consensus, it was decided that Part 1 would present conventional descriptions and Part 2 would pose clinical questions (CQs) in a systematic review format. Thus, Part 1 vastly covers PD that would satisfy the requirements of the members of the Japanese Society for Dialysis Therapy (JSDT). This article is the duplicated publication from the Japanese version of the guidelines and has been reproduced with permission from the JSDT.
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Abstract
Encapsulating peritoneal sclerosis (EPS), the most serious and classical complication of peritoneal dialysis (PD), was recognized soon after the introduction of PD. Within a little more than a decade after PD was first introduced in Japan, the country began experiencing an increasing number of EPS cases. The present paper discusses the clinical stages of EPS, the incidence of EPS in Japan and the as-yet incompletely understood mechanisms of its development, and EPS management and prevention.
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Affiliation(s)
- Yukio Maruyama
- Division of Kidney and Hypertension, Department of Internal Medicine, The Jikei University School of Medicine, Tokyo
| | - Masaaki Nakayama
- Research Division of Dialysis and Chronic Kidney Disease,2 Tohoku University Graduate School of Medicine, Sendai, Japan
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Crucial Role of NLRP3 Inflammasome in the Development of Peritoneal Dialysis-related Peritoneal Fibrosis. Sci Rep 2019; 9:10363. [PMID: 31316105 PMCID: PMC6637185 DOI: 10.1038/s41598-019-46504-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Accepted: 06/27/2019] [Indexed: 12/22/2022] Open
Abstract
Long-term peritoneal dialysis (PD) therapy leads to peritoneal inflammation and fibrosis. However, the mechanism underlying PD-related peritoneal inflammation and fibrosis remains unclear. NLRP3 inflammasome regulates the caspase-1-dependent release of interleukin-1β and mediates inflammation in various diseases. Here, we investigated the role of NLRP3 inflammasome in a murine model of PD-related peritoneal fibrosis induced by methylglyoxal (MGO). Inflammasome-related proteins were upregulated in the peritoneum of MGO-treated mice. MGO induced parietal and visceral peritoneal fibrosis in wild-type mice, which was significantly reduced in mice deficient in NLRP3, ASC, and interleukin-1β (IL-1β). ASC deficiency reduced the expression of inflammatory cytokines and fibrotic factors, and the infiltration of macrophages. However, myeloid cell-specific ASC deficiency failed to inhibit MGO-induced peritoneal fibrosis. MGO caused hemorrhagic ascites, fibrin deposition, and plasminogen activator inhibitor-1 upregulation, but all of these manifestations were inhibited by ASC deficiency. Furthermore, in vitro experiments showed that MGO induced cell death via the generation of reactive oxygen species in vascular endothelial cells, which was inhibited by ASC deficiency. Our results showed that endothelial NLRP3 inflammasome contributes to PD-related peritoneal inflammation and fibrosis, and provide new insights into the mechanisms underlying the pathogenesis of this disorder.
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Abstract
Encapsulating peritoneal sclerosis (EPS) is a rare but serious complication of peritoneal dialysis. In this review, we describe the clinical picture and histologic changes to the peritoneal membrane that are associated with EPS and provide an update on current diagnosis and management. We also discuss the recent studies that have suggested that the use of more biocompatible solutions containing lower concentrations of glucose degradation product that often are pH neutral in combination with a change in clinical practice (reducing glucose exposure and monitoring peritoneal membrane function) might ameliorate peritoneal degeneration, reduce the incidence of EPS, and minimize the severity of the disease.
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Affiliation(s)
- Helen Alston
- Department of Renal Medicine and Transplantation, Barts Health NHS Trust, London, UK
| | - Stanley Fan
- Department of Renal Medicine and Transplantation, Barts Health NHS Trust, London, UK.
| | - Masaaki Nakayama
- Department of Nephrology and Hypertension, Fukushima Medical University School of Medicine, Fukushima, Japan
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Tawada M, Ito Y, Hamada C, Honda K, Mizuno M, Suzuki Y, Sakata F, Terabayashi T, Matsukawa Y, Maruyama S, Imai E, Matsuo S, Takei Y. Vascular Endothelial Cell Injury Is an Important Factor in the Development of Encapsulating Peritoneal Sclerosis in Long-Term Peritoneal Dialysis Patients. PLoS One 2016; 11:e0154644. [PMID: 27119341 PMCID: PMC4847858 DOI: 10.1371/journal.pone.0154644] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2015] [Accepted: 04/15/2016] [Indexed: 12/22/2022] Open
Abstract
Background and Objectives Encapsulating peritoneal sclerosis (EPS) is a rare but serious and life-threatening complication of peritoneal dialysis (PD). However, the precise pathogenesis remains unclear; in addition, predictors and early diagnostic biomarkers for EPS have not yet to be established. Methods Eighty-three peritoneal membrane samples taken at catheter removal were examined to identify pathological characteristics of chronic peritoneal deterioration, which promotes EPS in patients undergoing long-term PD treatment with low occurrence of peritonitis. Results According to univariable logistic regression analysis of the pathological findings, thickness of the peritoneal membrane (P = 0.045), new membrane formation score (P = 0.006), ratio of luminal diameter to vessel diameter (L/V ratio, P<0.001), presence of CD31-negative vessels (P = 0.021), fibrin deposition (P<0.001), and collagen volume fraction (P = 0.018) were associated with EPS development. In analyses of samples with and without EPS matched for PD treatment period, non-diabetes, and PD solution, univariable analysis identified L/V ratio (per 0.1 increase: odds ratio (OR) 0.44, P = 0.003) and fibrin deposition (OR 6.35, P = 0.027) as the factors associated with EPS. L/V ratio was lower in patients with fibrin exudation than in patients without fibrin exudation. Conclusions These findings suggest that damage to vascular endothelial cells, as represented by low L/V ratio, could be a predictive finding for the development of EPS, particularly in long-term PD patients unaffected by peritonitis.
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Affiliation(s)
- Mitsuhiro Tawada
- Department of Nephrology and Renal Replacement Therapy, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Yasuhiko Ito
- Department of Nephrology and Renal Replacement Therapy, Nagoya University Graduate School of Medicine, Nagoya, Japan
- * E-mail:
| | - Chieko Hamada
- Department of Nephrology, Juntendo University, Tokyo, Japan
| | - Kazuho Honda
- Department of Pathology, Tokyo Women’s Medical University, Tokyo, Japan
| | - Masashi Mizuno
- Department of Nephrology and Renal Replacement Therapy, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Yasuhiro Suzuki
- Department of Nephrology and Renal Replacement Therapy, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Fumiko Sakata
- Department of Nephrology and Renal Replacement Therapy, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Takeshi Terabayashi
- Department of Nephrology and Renal Replacement Therapy, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Yoshihisa Matsukawa
- Department of Urology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Shoichi Maruyama
- Department of Nephrology and Renal Replacement Therapy, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Enyu Imai
- Department of Nephrology and Renal Replacement Therapy, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Seiichi Matsuo
- Department of Nephrology and Renal Replacement Therapy, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Yoshifumi Takei
- Department of Biochemistry, Nagoya University Graduate School of Medicine, Nagoya, Japan
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Nakayama M, Terawaki H. Multidisciplinary clinical strategies for encapsulating peritoneal sclerosis in peritoneal dialysis: update from Japan. Int J Urol 2014; 21:755-61. [PMID: 24673567 DOI: 10.1111/iju.12445] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2013] [Accepted: 02/16/2014] [Indexed: 01/01/2023]
Abstract
Peritoneal dialysis is established as a first-line standard renal replacement therapy for end-stage renal disease. However, the development of encapsulating peritoneal sclerosis has been a critical complication among long-term peritoneal dialysis patients. During the past decade, multidisciplinary approaches have been used to suppress encapsulating peritoneal sclerosis. The present article reviews the historical and present status of encapsulating peritoneal sclerosis in Japan.
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Affiliation(s)
- Masaaki Nakayama
- Department of Nephrology and Hypertension, Fukushima Medical University School of Medicine, Fukushima, Japan
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Nakayama M, Miyazaki M, Honda K, Kasai K, Tomo T, Nakamoto H, Kawanishi H. Encapsulating peritoneal sclerosis in the era of a multi-disciplinary approach based on biocompatible solutions: the NEXT-PD study. Perit Dial Int 2014; 34:766-74. [PMID: 24497585 DOI: 10.3747/pdi.2013.00074] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
INTRODUCTION Encapsulating peritoneal sclerosis (EPS) is a serious complication of peritoneal dialysis (PD). Over the past decade in Japan, a multidisciplinary approach has been adopted to minimize the incidence and improve outcomes of EPS. This strategy includes planned PD discontinuation for high-risk patients and the introduction of biocompatible solutions. This study examined the current clinical status of EPS in representative PD centers in Japan. DESIGN, SETTING, PARTICIPANTS AND MEASUREMENTS Patients (n = 1,338) from 55 PD centers in Japan who were using neutral-pH solutions from the initiation of therapy (mean age, 62 years; median PD duration, 32 months; concomitant use of icodextrin, 35.2%; PD and hemodialysis combination therapy, 12.2%) were assessed every 6 months to ascertain the reasons for PD discontinuation and the development of EPS development. Outcomes were also recorded. The study period was from November 2008 to March 2012. RESULTS There were 727 patients who discontinued PD, including 163 deaths. Among all causes of PD withdrawal except for death, planned PD discontinuation to avoid EPS was utilized in 58 cases (7.1% in total). The strategy was increasingly utilized in proportion to the duration of PD: 0.5% for patients undergoing PD for < 3 years, 0.6% for patients undergoing PD for 5 years, 14.7% for patients undergoing PD for 8 years, and 35.5% for patients undergoing PD for > 8 years. Fourteen patients developed EPS (three cases after PD), which corresponded with an overall incidence of 1.0%. The incidence according to the duration of PD was 0.3% for PD < 3 years, 0.6% for PD = 5 years, 2.3% for PD = 8 years, and 1.2% for PD > 8 years. In terms of therapy, 11 patients were treated with prednisolone (PSL), and surgical enterolysis was utilized in two cases. Complete remission of abdominal symptoms was achieved in twelve patients (85.7%), and three died due to EPS (mortality rate of 21.4%). CONCLUSIONS Use of the multidisciplinary approach described above reduces the risk of the development of EPS according to PD duration. In cases of de novo EPS cases in Japan, this strategy can also attenuate the clinical course of the condition.
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Affiliation(s)
- Masaaki Nakayama
- Tohoku University Graduate School of Medicine, Sendai, Japan; Fukushima Medical University School of Medicine, Fukushima, Japan; Miyazaki Clinic, Nagasaki, Japan; Tokyo Women's Medical University School of Medicine, Tokyo, Japan; Fuji City General Hospital, Fuji, Japan; Oita University School of Medicine, Oita, Japan; Saitama Medical University, Saitama, Japan; and Tsuchiya General Hospital, Hiroshima, Japan Tohoku University Graduate School of Medicine, Sendai, Japan; Fukushima Medical University School of Medicine, Fukushima, Japan; Miyazaki Clinic, Nagasaki, Japan; Tokyo Women's Medical University School of Medicine, Tokyo, Japan; Fuji City General Hospital, Fuji, Japan; Oita University School of Medicine, Oita, Japan; Saitama Medical University, Saitama, Japan; and Tsuchiya General Hospital, Hiroshima, Japan
| | - Masanobu Miyazaki
- Tohoku University Graduate School of Medicine, Sendai, Japan; Fukushima Medical University School of Medicine, Fukushima, Japan; Miyazaki Clinic, Nagasaki, Japan; Tokyo Women's Medical University School of Medicine, Tokyo, Japan; Fuji City General Hospital, Fuji, Japan; Oita University School of Medicine, Oita, Japan; Saitama Medical University, Saitama, Japan; and Tsuchiya General Hospital, Hiroshima, Japan
| | - Kazuho Honda
- Tohoku University Graduate School of Medicine, Sendai, Japan; Fukushima Medical University School of Medicine, Fukushima, Japan; Miyazaki Clinic, Nagasaki, Japan; Tokyo Women's Medical University School of Medicine, Tokyo, Japan; Fuji City General Hospital, Fuji, Japan; Oita University School of Medicine, Oita, Japan; Saitama Medical University, Saitama, Japan; and Tsuchiya General Hospital, Hiroshima, Japan
| | - Kenji Kasai
- Tohoku University Graduate School of Medicine, Sendai, Japan; Fukushima Medical University School of Medicine, Fukushima, Japan; Miyazaki Clinic, Nagasaki, Japan; Tokyo Women's Medical University School of Medicine, Tokyo, Japan; Fuji City General Hospital, Fuji, Japan; Oita University School of Medicine, Oita, Japan; Saitama Medical University, Saitama, Japan; and Tsuchiya General Hospital, Hiroshima, Japan
| | - Tadashi Tomo
- Tohoku University Graduate School of Medicine, Sendai, Japan; Fukushima Medical University School of Medicine, Fukushima, Japan; Miyazaki Clinic, Nagasaki, Japan; Tokyo Women's Medical University School of Medicine, Tokyo, Japan; Fuji City General Hospital, Fuji, Japan; Oita University School of Medicine, Oita, Japan; Saitama Medical University, Saitama, Japan; and Tsuchiya General Hospital, Hiroshima, Japan
| | - Hidetomo Nakamoto
- Tohoku University Graduate School of Medicine, Sendai, Japan; Fukushima Medical University School of Medicine, Fukushima, Japan; Miyazaki Clinic, Nagasaki, Japan; Tokyo Women's Medical University School of Medicine, Tokyo, Japan; Fuji City General Hospital, Fuji, Japan; Oita University School of Medicine, Oita, Japan; Saitama Medical University, Saitama, Japan; and Tsuchiya General Hospital, Hiroshima, Japan
| | - Hideki Kawanishi
- Tohoku University Graduate School of Medicine, Sendai, Japan; Fukushima Medical University School of Medicine, Fukushima, Japan; Miyazaki Clinic, Nagasaki, Japan; Tokyo Women's Medical University School of Medicine, Tokyo, Japan; Fuji City General Hospital, Fuji, Japan; Oita University School of Medicine, Oita, Japan; Saitama Medical University, Saitama, Japan; and Tsuchiya General Hospital, Hiroshima, Japan
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Trošt Rupnik A, Pajek J, Guček A, Osredkar J, Kovač D, Bren A, Klančič D, Saksida S, Rus I, Globokar M, Drozg A, Lešnik M, Plešivčnik Z, Ekart R, Lopert S, Lindič J. Influence of Renin-Angiotensin-Aldosterone System-Blocking Drugs on Peritoneal Membrane in Peritoneal Dialysis Patients. Ther Apher Dial 2013; 17:425-30. [DOI: 10.1111/1744-9987.12091] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Jernej Pajek
- Department of Nephrology; University Medical Centre Ljubljana; Ljubljana; Slovenia
| | - Andrej Guček
- Department of Nephrology; University Medical Centre Ljubljana; Ljubljana; Slovenia
| | - Joško Osredkar
- Institute of Clinical Chemistry and Biochemistry; University Medical Centre Ljubljana; Ljubljana; Slovenia
| | - Damjan Kovač
- Department of Nephrology; University Medical Centre Ljubljana; Ljubljana; Slovenia
| | - Andrej Bren
- Department of Nephrology; University Medical Centre Ljubljana; Ljubljana; Slovenia
| | - Dimitrij Klančič
- Department of Nephrology; General Hospital Nova Gorica; Nova Gorica; Slovenia
| | - Silvan Saksida
- Department of Nephrology; General Hospital Nova Gorica; Nova Gorica; Slovenia
| | - Igor Rus
- Department of Nephrology; General Hospital Jesenice; Jesenice; Slovenia
| | - Mateja Globokar
- Department of Nephrology; General Hospital Novo mesto; Novo mesto; Slovenia
| | - Andrej Drozg
- Department of Nephrology; General Hospital Celje; Celje; Slovenia
| | - Marjeta Lešnik
- Department of Nephrology; General Hospital Celje; Celje; Slovenia
| | - Zala Plešivčnik
- Department of Nephrology; General Hospital Slovenj Gradec; Slovenj Gradec; Slovenia
| | - Robert Ekart
- Department of Nephrology; University Medical Centre Maribor; Maribor; Slovenia
| | - Simona Lopert
- Department of Nephrology; General Hospital Murska Sobota; Murska Sobota; Slovenia
| | - Jelka Lindič
- Department of Nephrology; University Medical Centre Ljubljana; Ljubljana; Slovenia
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Habib SM, Korte MR, Betjes MGH. Lower mortality and inflammation from post-transplantation encapsulating peritoneal sclerosis compared to the classical form. Am J Nephrol 2013; 37:223-30. [PMID: 23467015 DOI: 10.1159/000348267] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2012] [Accepted: 01/22/2013] [Indexed: 12/22/2022]
Abstract
BACKGROUND Encapsulating peritoneal sclerosis (EPS) may occur after kidney transplantation (post-transplantation EPS) or may be diagnosed during or after peritoneal dialysis treatment (classical EPS). The aim of the present study was to investigate to what extent both EPS entities differ in clinical presentation, radiological findings, outcome, and the systemic inflammatory response, as measured by plasma C-reactive protein (CRP) levels both prior to and after EPS diagnosis. METHODS We performed a retrospective analysis of 15 post-transplantation EPS and 19 classical EPS patients who were diagnosed at seven hospitals in the Netherlands between January 1, 2000, and January 1, 2011. RESULTS There were no inter-group differences in age, duration of peritoneal dialysis, clinical presentation, or radiology findings at diagnosis. Post-transplantation patients had experienced a lower number of peritonitis episodes per patient-year (0.2 (0.0-0.4) vs. 0.7 (0.3-1.2), p = 0.01) with a longer interval between the last peritonitis and EPS diagnosis (18.1 (4.6-34.3) vs. 4.4 (0.89-13.78) months, p = 0.01). Post-transplantation EPS patients showed a remarkably lower mortality rate (40.0 vs. 84.2%, p < 0.05). In both groups a pattern of elevated CRP values was observed, increasing within the year before EPS diagnosis. In the post-transplantation group the median CRP level at diagnosis was lower (56.0 vs. 144.50 mg/l, p < 0.05) than in the classical EPS group. CONCLUSION Post-transplantation EPS has a similar clinical presentation as classical EPS but with a lower systemic inflammatory response and better outcome.
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Affiliation(s)
- Sayed M Habib
- Division of Nephrology and Transplantation, Department of Internal Medicine, Erasmus Medical Center, Rotterdam, The Netherlands
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Mizumasa T, Hirakata H, Kuroki Y, Katafuchi R, Yotsueda H, Mitsuiki K, Nakashima Y, Tsuruya K. Diabetes influences peritoneal morphology in uremic patients at the initiation of peritoneal dialysis. Perit Dial Int 2012; 33:175-81. [PMID: 22942267 DOI: 10.3747/pdi.2011.00205] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND The peritoneum begins to undergo morphologic changes before the start of peritoneal dialysis (PD), particularly in diabetic patients. The present study was conducted to investigate the effects of diabetes on the peritoneum. METHODS This study involved 17 patients who began receiving PD and had diabetes as an underlying disease (DM group), and 30 patients without diabetes who served as a control group (nonDM group). At the start of PD, the parietal peritoneum was sampled to assess submesothelial connective tissue thickness, number of capillaries and postcapillary venules, and indications of vasculopathy (grades 0 - 3). RESULTS Submesothelial connective tissue thickness was significantly greater in the DM group than in the nonDM group (p < 0.01). The number of capillaries was significantly greater in the DM group (p < 0.01). Based on multivariate linear regression analysis, diabetes was identified as a significant independent variable of both submesothelial connective tissue thickness and number of capillaries (p < 0.01). CONCLUSIONS In diabetic patients, morphologic changes of the peritoneum are marked at the start of PD.
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Affiliation(s)
- Tohru Mizumasa
- Nephrology and Dialysis Center, Fukuoka Red-Cross Hospital, Fukuoka City, Japan.
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Sherif AM, Yoshida H, Maruyama Y, Yamamoto H, Yokoyama K, Hosoya T, Kawakami M, Nakayama M. Comparison between the pathology of encapsulating sclerosis and simple sclerosis of the peritoneal membrane in chronic peritoneal dialysis. Ther Apher Dial 2008; 12:33-41. [PMID: 18257810 DOI: 10.1111/j.1744-9987.2007.00538.x] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Reports analyzing the histopathological differences between encapsulating peritoneal sclerosis (EPS) and simple peritoneal sclerosis (non-EPS) and those comparing the pathology of early and late EPS are limited. We present pathological comparisons between EPS and non-EPS, also between the early and late EPS stages. We compared peritoneal membrane (PM) samples (Group B) of 12 EPS patients (Group A) and 23 non-EPS cases regarding; mesothelial loss, submesothelial compact zone degenerated layer and compact zone thicknesses, densities of total and diseased vessels, fibrin stain, new membrane formation and degenerative changes. Group A was subdivided into 7 early (group A1) and 8 late (group A2) EPS cases; we compared both subgroups in the same manner and finally compared groups A1, A2, and B. No differences were found between groups A and B in the incidences of mesothelial detachment, new membrane formation and compact zone degenerative changes between the two groups. Furthermore, there were no differences in compact zone thickness, and vascular densities in the compact zone of respective vascular grade. Whereas, fibrin deposition and thickness of the submesothelial degenerated layer were significantly higher in group A than group B (P = 0.01 and 0.05, respectively), and the thickness of the compact zone was less in group A1 than in group A2 (P = 0.03). Positive fibrin stains and thick degenerative compact zone layers are important pathological findings in EPS. Angiogenesis, vasculopathy, new membrane formation, fibrosis and degenerative changes of the compact zone are not unique characteristics for EPS. Larger size studies are recommended to verify this issue.
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Affiliation(s)
- Ali M Sherif
- Department of Kidney and Hypertension, The Jikei University School of Medicine, Tokyo, Japan.
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Alscher DM, Braun N, Biegger D, Fritz P. Peritoneal mast cells in peritoneal dialysis patients, particularly in encapsulating peritoneal sclerosis patients. Am J Kidney Dis 2007; 49:452-61. [PMID: 17336707 DOI: 10.1053/j.ajkd.2006.11.040] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2006] [Accepted: 11/21/2006] [Indexed: 11/11/2022]
Abstract
BACKGROUND We assumed that increased mast cell numbers contribute substantially to the fibrosis often seen in the peritoneum of peritoneal dialysis (PD) patients, particularly those with encapsulating peritoneal fibrosis (EPS). Therefore, we investigated mast cells in different pathological conditions of the peritoneum. METHODS One hundred fifteen tissue probes with different peritoneal pathological states were selected (normal, n = 20; chronic appendicitis, n = 25; herniotomy, n = 24; fibrosis, n = 11; PD, n = 26; and EPS, n = 9). For staining of mast cells, we used alpha-naphtol-AS-d-chloracetate-esterase and mast cell tryptase. Next, we counted numbers of mast cells per square millimeter. Tryptase was measured by using image analysis. RESULTS Measurements by means of both methods correlated well (r = 0.812). Numbers of mast cells per square millimeter were as follows: normal, 26 +/- 16; chronic appendicitis, 241 +/- 217; herniotomy, 115 +/- 88; fibrosis, 99 +/- 66; PD, 81 +/- 64, and EPS, 24 +/- 23 (P = 0.00006). Amounts of tryptase present were 2.900 +/- 0.118, 2.871 +/- 0.150, 2.733 +/- 0.183, 3.041 +/- 0.176, 2.780 +/- 0.184, and 2.609 +/- 0.234, respectively (P = 0.00002). CONCLUSION We found upregulation of mast cells in specimens of chronic inflammatory diseases of the peritoneum. This also was true for PD patients, with the exclusion of patients with EPS. Therefore, loss-of-control functions of mast cells may contribute to the ill-understood disease entity of EPS.
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Affiliation(s)
- Dominik M Alscher
- Department of Internal Medicine, Division of General Internal Medicine and Nephrology, Robert-Bosch-Hospital, Stuttgart, Germany.
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