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Ueno H, Miyamoto T, Morimoto H, Sanada K, Furuno I, Nakazono K, Hasegawa E, Kuma A, Oginosawa Y, Tsuda Y, Araki M, Tamura M, Ueta Y, Otsuji Y, Kataoka M. Effects of bicarbonate/lactate-buffered neutral peritoneal dialysis fluids on angiogenesis-related proteins in patients undergoing peritoneal dialysis. RENAL REPLACEMENT THERAPY 2021. [DOI: 10.1186/s41100-021-00344-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Abstract
Background
In order to facilitate the safe and long-term delivery of peritoneal dialysis (PD), it is necessary to improve the biocompatibility of peritoneal dialysis fluids (PDFs). The novel bicarbonate/lactate-buffered neutral PDFs (B/L-PDFs) are expected to be improved biocompatible. This study evaluated the biocompatibility of B/L-PDFs by analysis on the profile of angiogenesis-related proteins in drained dialysate of patients undergoing PD.
Methods
Concentrations of 20 angiogenesis-related proteins in the dialysate were semi-quantitatively determined using a RayBio® Human Angiogenesis Antibody Array and were compared between B/L-PDFs and conventional lactate-buffered neutral PDFs (L-PDFs).
Results
The expression of growth-related oncogene (GRO α/β/γ), which belongs to the CXC chemokine family, decreased significantly after use of the B/L-PDFs compared to the L-PDFs (P = 0.03). The number of the proteins with lower level in the B/L-PDFs compared with L-PDFs was significantly negatively correlated with the PD duration (Spearman ρ = − 0.81, P = 0.004).
Conclusion
This study suggested that B/L-PDFs are more biocompatible than conventional PDFs.
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Higuchi C, Kuriyama J, Sakura H. Effect of lactate as a peritoneal dialysis fluid buffer on rat peritoneal mesothelial cells. RENAL REPLACEMENT THERAPY 2020. [DOI: 10.1186/s41100-020-00306-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Abstract
Background
Neutral, low-glucose degradation product (GDP) peritoneal dialysis fluid (PDF) is less damaging to the peritoneum than conventional PDF but is still insufficient for biocompatibility. One remaining issue is the problem of buffering.
Methods
Using cultured rat peritoneal mesothelial cells (PMCs), the present study examined the difference between the effects of neutral low-GDP lactate PDF and neutral low-GDP bicarbonate/lactate PDF on cells. The effects of lactate stimulation on these cells were also examined.
Results
Lactate PDF enhanced mRNA expressions of α-smooth muscle actin (αSMA) and type 1 and type 3 collagens and lowered expression of e-cadherin mRNA in PMCs compared to bicarbonate/lactate PDF. Lactate stimulation increased mRNA expressions of αSMA, matrix metalloproteinase 2 (MMP2), and basic fibroblast growth factor (bFGF) and suppressed e-cadherin mRNA expression. Transforming growth factor (TGF)-β1 and TGF-β2 and collagen type 1 and 3 mRNA expressions were also enhanced by lactate stimulation.
Conclusions
These results suggest that lactate as a PDF buffer may act on PMCs to promote epithelial-mesenchymal transition (EMT) and production of TGF-β, bFGF, and collagen.
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van Gelder MK, Ligabue G, Giovanella S, Bianchini E, Simonis F, Hazenbrink DHM, Joles JA, Bajo Rubio MA, Selgas R, Cappelli G, Gerritsen KGF. In vitro efficacy and safety of a system for sorbent-assisted peritoneal dialysis. Am J Physiol Renal Physiol 2020; 319:F162-F170. [PMID: 32475132 DOI: 10.1152/ajprenal.00079.2020] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
A system for sorbent-assisted peritoneal dialysis (SAPD) was designed to continuously recirculate dialysate via a tidal mode using a single lumen peritoneal catheter with regeneration of spent dialysate by means of sorbent technology. We hypothesize that SAPD treatment will maintain a high plasma-to-dialysate concentration gradient and increase the mass transfer area coefficient of solutes. Thereby, the SAPD system may enhance clearance while reducing the number of exchanges. Application is envisaged at night as a bedside device (12 kg, nighttime system). A wearable system (2.0 kg, daytime system) may further enhance clearance during the day. Urea, creatinine, and phosphate removal were studied with the daytime and nighttime system (n = 3 per system) by recirculating 2 liters of spent peritoneal dialysate via a tidal mode (mean flow rate: 50 and 100 mL/min, respectively) for 8 h in vitro. Time-averaged plasma clearance over 24 h was modeled assuming one 2 liter exchange/day, an increase in mass transfer area coefficient, and 0.9 liters ultrafiltration/day. Urea, creatinine, and phosphate removal was 33.2 ± 4.1, 5.3 ± 0.5, and 6.2 ± 1.8 mmol, respectively, with the daytime system and 204 ± 28, 10.3 ± 2.4, and 11.4 ± 2.1 mmol, respectively, with the nighttime system. Time-averaged plasma clearances of urea, creatinine and phosphate were 9.6 ± 1.1, 9.6 ± 1.7, and 7.0 ± 0.9 mL/min, respectively, with the nighttime system and 10.8 ± 1.1, 13.4 ± 1.8, and 9.7 ± 1.6 mL/min, respectively, with the daytime and nighttime system. SAPD treatment may improve removal of uremic toxins compared with conventional peritoneal dialysis, provided that peritoneal mass transport will increase.
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Affiliation(s)
- Maaike K van Gelder
- Department of Nephrology and Hypertension, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Giulia Ligabue
- Division of Nephrology, Surgical, Medical, Dental, Morphology Sciences, Transplant, Oncology and Regenerative Medicine Department, University of Modena and Reggio Emilia, Modena, Italy
| | - Silvia Giovanella
- Division of Nephrology, Surgical, Medical, Dental, Morphology Sciences, Transplant, Oncology and Regenerative Medicine Department, University of Modena and Reggio Emilia, Modena, Italy
| | - Elena Bianchini
- Division of Nephrology, Surgical, Medical, Dental, Morphology Sciences, Transplant, Oncology and Regenerative Medicine Department, University of Modena and Reggio Emilia, Modena, Italy
| | | | - Diënty H M Hazenbrink
- Department of Nephrology and Hypertension, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Jaap A Joles
- Department of Nephrology and Hypertension, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Maria A Bajo Rubio
- Nephrology Service, Hospital Universitario La Paz, Institute for Health Research, Instituto Reina Sofía de Investigación en Nefrología, the Spanish Renal Research Network, Madrid, Spain
| | - Rafael Selgas
- Nephrology Service, Hospital Universitario La Paz, Institute for Health Research, Instituto Reina Sofía de Investigación en Nefrología, the Spanish Renal Research Network, Madrid, Spain
| | - Gianni Cappelli
- Division of Nephrology, Surgical, Medical, Dental, Morphology Sciences, Transplant, Oncology and Regenerative Medicine Department, University of Modena and Reggio Emilia, Modena, Italy
| | - Karin G F Gerritsen
- Department of Nephrology and Hypertension, University Medical Center Utrecht, Utrecht, The Netherlands
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