Assessment of the association between increasing membrane pore size and endotoxin permeability using a novel experimental dialysis simulation set-up

Abstract Background Membranes with increasing pore size are introduced to enhance removal of large uremic toxins with regular hemodialysis. These membranes might theoretically have higher permeability for bacterial degradation products. In this paper, permeability for bacterial degradation products of membranes of comparable composition with different pore size was investigated with a new in vitro set-up that represents clinical flow and pressure conditions. Methods Dialysis was simulated with an AK200 machine using a low-flux, high-flux, medium cut-off (MCO) or high cut-off (HCO) device (n = 6/type). A polyvinylpyrrolidone-solution (PVP) was recirculated at blood side. At dialysate side, a challenge solution containing a filtrated lysate of two water-borne bacteria (Pseudomonas aeruginosa and Pelomononas saccharophila) was infused in the dialysate flow (endotoxin ≥ 4EU/ml). Blood and dialysate flow were set at 400 and 500 ml/min for 60 min. PVP was sampled before (PVPpre) and after (PVPpost) the experiment and dialysate after 5 and 55 min. Limulus Amebocyte Lysate (LAL) test was performed. Additionally, samples were incubated with a THP-1 cell line (24 h) and IL-1β levels were measured evaluating biological activity. Results The LAL-assay confirmed presence of 9.5 ± 7.4 EU/ml at dialysate side. For none of the devices the LAL activity in PVPpre vs. PVPpost was significantly different. Although more blood side PVP solutions had a detectable amount of endotoxin using a highly sensitive LAL assay in the more open vs traditional membranes, the permeability for endotoxins of the 4 tested dialysis membranes was not significantly different but the number of repeats is small. None of the PVP solutions induced IL-1β in the THP-1 assay. Conclusions A realisitic in vitro dialysis was developed to assess membrane translocation of bacterial products. LAL activity on the blood side after endotoxin exposure did not change for all membranes. Also, none of the PVPpost solutions induced IL-1β in the THP-1 bio-assay. Ausführliche Beschreibung

Gespeichert in:

Autor*in:	Eva Schepers [verfasserIn] Griet Glorieux [verfasserIn] Sunny Eloot [verfasserIn] Michael Hulko [verfasserIn] Adriana Boschetti-de-Fierro [verfasserIn] Werner Beck [verfasserIn] Bernd Krause [verfasserIn] Wim Van Biesen [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2018

Schlagwörter:	Hemodialysis Endotoxin Water quality Membrane permeability

Übergeordnetes Werk:	In: BMC Nephrology - BMC, 2003, 19(2018), 1, Seite 10
Übergeordnetes Werk:	volume:19 ; year:2018 ; number:1 ; pages:10

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc

DOI / URN:	10.1186/s12882-017-0808-y

Katalog-ID:	DOAJ04135415X

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520			\|a Abstract Background Membranes with increasing pore size are introduced to enhance removal of large uremic toxins with regular hemodialysis. These membranes might theoretically have higher permeability for bacterial degradation products. In this paper, permeability for bacterial degradation products of membranes of comparable composition with different pore size was investigated with a new in vitro set-up that represents clinical flow and pressure conditions. Methods Dialysis was simulated with an AK200 machine using a low-flux, high-flux, medium cut-off (MCO) or high cut-off (HCO) device (n = 6/type). A polyvinylpyrrolidone-solution (PVP) was recirculated at blood side. At dialysate side, a challenge solution containing a filtrated lysate of two water-borne bacteria (Pseudomonas aeruginosa and Pelomononas saccharophila) was infused in the dialysate flow (endotoxin ≥ 4EU/ml). Blood and dialysate flow were set at 400 and 500 ml/min for 60 min. PVP was sampled before (PVPpre) and after (PVPpost) the experiment and dialysate after 5 and 55 min. Limulus Amebocyte Lysate (LAL) test was performed. Additionally, samples were incubated with a THP-1 cell line (24 h) and IL-1β levels were measured evaluating biological activity. Results The LAL-assay confirmed presence of 9.5 ± 7.4 EU/ml at dialysate side. For none of the devices the LAL activity in PVPpre vs. PVPpost was significantly different. Although more blood side PVP solutions had a detectable amount of endotoxin using a highly sensitive LAL assay in the more open vs traditional membranes, the permeability for endotoxins of the 4 tested dialysis membranes was not significantly different but the number of repeats is small. None of the PVP solutions induced IL-1β in the THP-1 assay. Conclusions A realisitic in vitro dialysis was developed to assess membrane translocation of bacterial products. LAL activity on the blood side after endotoxin exposure did not change for all membranes. Also, none of the PVPpost solutions induced IL-1β in the THP-1 bio-assay.
650		4	\|a Hemodialysis
650		4	\|a Endotoxin
650		4	\|a Water quality
650		4	\|a Membrane permeability
653		0	\|a Diseases of the genitourinary system. Urology
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700	0		\|a Wim Van Biesen \|e verfasserin \|4 aut
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allfields	10.1186/s12882-017-0808-y doi (DE-627)DOAJ04135415X (DE-599)DOAJc8f0b2e217534ed5a3e975d6885a9d18 DE-627 ger DE-627 rakwb eng RC870-923 Eva Schepers verfasserin aut Assessment of the association between increasing membrane pore size and endotoxin permeability using a novel experimental dialysis simulation set-up 2018 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Background Membranes with increasing pore size are introduced to enhance removal of large uremic toxins with regular hemodialysis. These membranes might theoretically have higher permeability for bacterial degradation products. In this paper, permeability for bacterial degradation products of membranes of comparable composition with different pore size was investigated with a new in vitro set-up that represents clinical flow and pressure conditions. Methods Dialysis was simulated with an AK200 machine using a low-flux, high-flux, medium cut-off (MCO) or high cut-off (HCO) device (n = 6/type). A polyvinylpyrrolidone-solution (PVP) was recirculated at blood side. At dialysate side, a challenge solution containing a filtrated lysate of two water-borne bacteria (Pseudomonas aeruginosa and Pelomononas saccharophila) was infused in the dialysate flow (endotoxin ≥ 4EU/ml). Blood and dialysate flow were set at 400 and 500 ml/min for 60 min. PVP was sampled before (PVPpre) and after (PVPpost) the experiment and dialysate after 5 and 55 min. Limulus Amebocyte Lysate (LAL) test was performed. Additionally, samples were incubated with a THP-1 cell line (24 h) and IL-1β levels were measured evaluating biological activity. Results The LAL-assay confirmed presence of 9.5 ± 7.4 EU/ml at dialysate side. For none of the devices the LAL activity in PVPpre vs. PVPpost was significantly different. Although more blood side PVP solutions had a detectable amount of endotoxin using a highly sensitive LAL assay in the more open vs traditional membranes, the permeability for endotoxins of the 4 tested dialysis membranes was not significantly different but the number of repeats is small. None of the PVP solutions induced IL-1β in the THP-1 assay. Conclusions A realisitic in vitro dialysis was developed to assess membrane translocation of bacterial products. LAL activity on the blood side after endotoxin exposure did not change for all membranes. Also, none of the PVPpost solutions induced IL-1β in the THP-1 bio-assay. Hemodialysis Endotoxin Water quality Membrane permeability Diseases of the genitourinary system. Urology Griet Glorieux verfasserin aut Sunny Eloot verfasserin aut Michael Hulko verfasserin aut Adriana Boschetti-de-Fierro verfasserin aut Werner Beck verfasserin aut Bernd Krause verfasserin aut Wim Van Biesen verfasserin aut In BMC Nephrology BMC, 2003 19(2018), 1, Seite 10 (DE-627)326643672 (DE-600)2041348-8 14712369 nnns volume:19 year:2018 number:1 pages:10 https://doi.org/10.1186/s12882-017-0808-y kostenfrei https://doaj.org/article/c8f0b2e217534ed5a3e975d6885a9d18 kostenfrei http://link.springer.com/article/10.1186/s12882-017-0808-y kostenfrei https://doaj.org/toc/1471-2369 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2003 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 19 2018 1 10
spelling	10.1186/s12882-017-0808-y doi (DE-627)DOAJ04135415X (DE-599)DOAJc8f0b2e217534ed5a3e975d6885a9d18 DE-627 ger DE-627 rakwb eng RC870-923 Eva Schepers verfasserin aut Assessment of the association between increasing membrane pore size and endotoxin permeability using a novel experimental dialysis simulation set-up 2018 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Background Membranes with increasing pore size are introduced to enhance removal of large uremic toxins with regular hemodialysis. These membranes might theoretically have higher permeability for bacterial degradation products. In this paper, permeability for bacterial degradation products of membranes of comparable composition with different pore size was investigated with a new in vitro set-up that represents clinical flow and pressure conditions. Methods Dialysis was simulated with an AK200 machine using a low-flux, high-flux, medium cut-off (MCO) or high cut-off (HCO) device (n = 6/type). A polyvinylpyrrolidone-solution (PVP) was recirculated at blood side. At dialysate side, a challenge solution containing a filtrated lysate of two water-borne bacteria (Pseudomonas aeruginosa and Pelomononas saccharophila) was infused in the dialysate flow (endotoxin ≥ 4EU/ml). Blood and dialysate flow were set at 400 and 500 ml/min for 60 min. PVP was sampled before (PVPpre) and after (PVPpost) the experiment and dialysate after 5 and 55 min. Limulus Amebocyte Lysate (LAL) test was performed. Additionally, samples were incubated with a THP-1 cell line (24 h) and IL-1β levels were measured evaluating biological activity. Results The LAL-assay confirmed presence of 9.5 ± 7.4 EU/ml at dialysate side. For none of the devices the LAL activity in PVPpre vs. PVPpost was significantly different. Although more blood side PVP solutions had a detectable amount of endotoxin using a highly sensitive LAL assay in the more open vs traditional membranes, the permeability for endotoxins of the 4 tested dialysis membranes was not significantly different but the number of repeats is small. None of the PVP solutions induced IL-1β in the THP-1 assay. Conclusions A realisitic in vitro dialysis was developed to assess membrane translocation of bacterial products. LAL activity on the blood side after endotoxin exposure did not change for all membranes. Also, none of the PVPpost solutions induced IL-1β in the THP-1 bio-assay. Hemodialysis Endotoxin Water quality Membrane permeability Diseases of the genitourinary system. Urology Griet Glorieux verfasserin aut Sunny Eloot verfasserin aut Michael Hulko verfasserin aut Adriana Boschetti-de-Fierro verfasserin aut Werner Beck verfasserin aut Bernd Krause verfasserin aut Wim Van Biesen verfasserin aut In BMC Nephrology BMC, 2003 19(2018), 1, Seite 10 (DE-627)326643672 (DE-600)2041348-8 14712369 nnns volume:19 year:2018 number:1 pages:10 https://doi.org/10.1186/s12882-017-0808-y kostenfrei https://doaj.org/article/c8f0b2e217534ed5a3e975d6885a9d18 kostenfrei http://link.springer.com/article/10.1186/s12882-017-0808-y kostenfrei https://doaj.org/toc/1471-2369 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2003 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 19 2018 1 10
allfields_unstemmed	10.1186/s12882-017-0808-y doi (DE-627)DOAJ04135415X (DE-599)DOAJc8f0b2e217534ed5a3e975d6885a9d18 DE-627 ger DE-627 rakwb eng RC870-923 Eva Schepers verfasserin aut Assessment of the association between increasing membrane pore size and endotoxin permeability using a novel experimental dialysis simulation set-up 2018 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Background Membranes with increasing pore size are introduced to enhance removal of large uremic toxins with regular hemodialysis. These membranes might theoretically have higher permeability for bacterial degradation products. In this paper, permeability for bacterial degradation products of membranes of comparable composition with different pore size was investigated with a new in vitro set-up that represents clinical flow and pressure conditions. Methods Dialysis was simulated with an AK200 machine using a low-flux, high-flux, medium cut-off (MCO) or high cut-off (HCO) device (n = 6/type). A polyvinylpyrrolidone-solution (PVP) was recirculated at blood side. At dialysate side, a challenge solution containing a filtrated lysate of two water-borne bacteria (Pseudomonas aeruginosa and Pelomononas saccharophila) was infused in the dialysate flow (endotoxin ≥ 4EU/ml). Blood and dialysate flow were set at 400 and 500 ml/min for 60 min. PVP was sampled before (PVPpre) and after (PVPpost) the experiment and dialysate after 5 and 55 min. Limulus Amebocyte Lysate (LAL) test was performed. Additionally, samples were incubated with a THP-1 cell line (24 h) and IL-1β levels were measured evaluating biological activity. Results The LAL-assay confirmed presence of 9.5 ± 7.4 EU/ml at dialysate side. For none of the devices the LAL activity in PVPpre vs. PVPpost was significantly different. Although more blood side PVP solutions had a detectable amount of endotoxin using a highly sensitive LAL assay in the more open vs traditional membranes, the permeability for endotoxins of the 4 tested dialysis membranes was not significantly different but the number of repeats is small. None of the PVP solutions induced IL-1β in the THP-1 assay. Conclusions A realisitic in vitro dialysis was developed to assess membrane translocation of bacterial products. LAL activity on the blood side after endotoxin exposure did not change for all membranes. Also, none of the PVPpost solutions induced IL-1β in the THP-1 bio-assay. Hemodialysis Endotoxin Water quality Membrane permeability Diseases of the genitourinary system. Urology Griet Glorieux verfasserin aut Sunny Eloot verfasserin aut Michael Hulko verfasserin aut Adriana Boschetti-de-Fierro verfasserin aut Werner Beck verfasserin aut Bernd Krause verfasserin aut Wim Van Biesen verfasserin aut In BMC Nephrology BMC, 2003 19(2018), 1, Seite 10 (DE-627)326643672 (DE-600)2041348-8 14712369 nnns volume:19 year:2018 number:1 pages:10 https://doi.org/10.1186/s12882-017-0808-y kostenfrei https://doaj.org/article/c8f0b2e217534ed5a3e975d6885a9d18 kostenfrei http://link.springer.com/article/10.1186/s12882-017-0808-y kostenfrei https://doaj.org/toc/1471-2369 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2003 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 19 2018 1 10
allfieldsGer	10.1186/s12882-017-0808-y doi (DE-627)DOAJ04135415X (DE-599)DOAJc8f0b2e217534ed5a3e975d6885a9d18 DE-627 ger DE-627 rakwb eng RC870-923 Eva Schepers verfasserin aut Assessment of the association between increasing membrane pore size and endotoxin permeability using a novel experimental dialysis simulation set-up 2018 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Background Membranes with increasing pore size are introduced to enhance removal of large uremic toxins with regular hemodialysis. These membranes might theoretically have higher permeability for bacterial degradation products. In this paper, permeability for bacterial degradation products of membranes of comparable composition with different pore size was investigated with a new in vitro set-up that represents clinical flow and pressure conditions. Methods Dialysis was simulated with an AK200 machine using a low-flux, high-flux, medium cut-off (MCO) or high cut-off (HCO) device (n = 6/type). A polyvinylpyrrolidone-solution (PVP) was recirculated at blood side. At dialysate side, a challenge solution containing a filtrated lysate of two water-borne bacteria (Pseudomonas aeruginosa and Pelomononas saccharophila) was infused in the dialysate flow (endotoxin ≥ 4EU/ml). Blood and dialysate flow were set at 400 and 500 ml/min for 60 min. PVP was sampled before (PVPpre) and after (PVPpost) the experiment and dialysate after 5 and 55 min. Limulus Amebocyte Lysate (LAL) test was performed. Additionally, samples were incubated with a THP-1 cell line (24 h) and IL-1β levels were measured evaluating biological activity. Results The LAL-assay confirmed presence of 9.5 ± 7.4 EU/ml at dialysate side. For none of the devices the LAL activity in PVPpre vs. PVPpost was significantly different. Although more blood side PVP solutions had a detectable amount of endotoxin using a highly sensitive LAL assay in the more open vs traditional membranes, the permeability for endotoxins of the 4 tested dialysis membranes was not significantly different but the number of repeats is small. None of the PVP solutions induced IL-1β in the THP-1 assay. Conclusions A realisitic in vitro dialysis was developed to assess membrane translocation of bacterial products. LAL activity on the blood side after endotoxin exposure did not change for all membranes. Also, none of the PVPpost solutions induced IL-1β in the THP-1 bio-assay. Hemodialysis Endotoxin Water quality Membrane permeability Diseases of the genitourinary system. Urology Griet Glorieux verfasserin aut Sunny Eloot verfasserin aut Michael Hulko verfasserin aut Adriana Boschetti-de-Fierro verfasserin aut Werner Beck verfasserin aut Bernd Krause verfasserin aut Wim Van Biesen verfasserin aut In BMC Nephrology BMC, 2003 19(2018), 1, Seite 10 (DE-627)326643672 (DE-600)2041348-8 14712369 nnns volume:19 year:2018 number:1 pages:10 https://doi.org/10.1186/s12882-017-0808-y kostenfrei https://doaj.org/article/c8f0b2e217534ed5a3e975d6885a9d18 kostenfrei http://link.springer.com/article/10.1186/s12882-017-0808-y kostenfrei https://doaj.org/toc/1471-2369 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2003 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 19 2018 1 10
allfieldsSound	10.1186/s12882-017-0808-y doi (DE-627)DOAJ04135415X (DE-599)DOAJc8f0b2e217534ed5a3e975d6885a9d18 DE-627 ger DE-627 rakwb eng RC870-923 Eva Schepers verfasserin aut Assessment of the association between increasing membrane pore size and endotoxin permeability using a novel experimental dialysis simulation set-up 2018 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Background Membranes with increasing pore size are introduced to enhance removal of large uremic toxins with regular hemodialysis. These membranes might theoretically have higher permeability for bacterial degradation products. In this paper, permeability for bacterial degradation products of membranes of comparable composition with different pore size was investigated with a new in vitro set-up that represents clinical flow and pressure conditions. Methods Dialysis was simulated with an AK200 machine using a low-flux, high-flux, medium cut-off (MCO) or high cut-off (HCO) device (n = 6/type). A polyvinylpyrrolidone-solution (PVP) was recirculated at blood side. At dialysate side, a challenge solution containing a filtrated lysate of two water-borne bacteria (Pseudomonas aeruginosa and Pelomononas saccharophila) was infused in the dialysate flow (endotoxin ≥ 4EU/ml). Blood and dialysate flow were set at 400 and 500 ml/min for 60 min. PVP was sampled before (PVPpre) and after (PVPpost) the experiment and dialysate after 5 and 55 min. Limulus Amebocyte Lysate (LAL) test was performed. Additionally, samples were incubated with a THP-1 cell line (24 h) and IL-1β levels were measured evaluating biological activity. Results The LAL-assay confirmed presence of 9.5 ± 7.4 EU/ml at dialysate side. For none of the devices the LAL activity in PVPpre vs. PVPpost was significantly different. Although more blood side PVP solutions had a detectable amount of endotoxin using a highly sensitive LAL assay in the more open vs traditional membranes, the permeability for endotoxins of the 4 tested dialysis membranes was not significantly different but the number of repeats is small. None of the PVP solutions induced IL-1β in the THP-1 assay. Conclusions A realisitic in vitro dialysis was developed to assess membrane translocation of bacterial products. LAL activity on the blood side after endotoxin exposure did not change for all membranes. Also, none of the PVPpost solutions induced IL-1β in the THP-1 bio-assay. Hemodialysis Endotoxin Water quality Membrane permeability Diseases of the genitourinary system. Urology Griet Glorieux verfasserin aut Sunny Eloot verfasserin aut Michael Hulko verfasserin aut Adriana Boschetti-de-Fierro verfasserin aut Werner Beck verfasserin aut Bernd Krause verfasserin aut Wim Van Biesen verfasserin aut In BMC Nephrology BMC, 2003 19(2018), 1, Seite 10 (DE-627)326643672 (DE-600)2041348-8 14712369 nnns volume:19 year:2018 number:1 pages:10 https://doi.org/10.1186/s12882-017-0808-y kostenfrei https://doaj.org/article/c8f0b2e217534ed5a3e975d6885a9d18 kostenfrei http://link.springer.com/article/10.1186/s12882-017-0808-y kostenfrei https://doaj.org/toc/1471-2369 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2003 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 19 2018 1 10
language	English
source	In BMC Nephrology 19(2018), 1, Seite 10 volume:19 year:2018 number:1 pages:10
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format_phy_str_mv	Article
institution	findex.gbv.de
topic_facet	Hemodialysis Endotoxin Water quality Membrane permeability Diseases of the genitourinary system. Urology
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authorswithroles_txt_mv	Eva Schepers @@aut@@ Griet Glorieux @@aut@@ Sunny Eloot @@aut@@ Michael Hulko @@aut@@ Adriana Boschetti-de-Fierro @@aut@@ Werner Beck @@aut@@ Bernd Krause @@aut@@ Wim Van Biesen @@aut@@
publishDateDaySort_date	2018-01-01T00:00:00Z
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topic_title	RC870-923 Assessment of the association between increasing membrane pore size and endotoxin permeability using a novel experimental dialysis simulation set-up Hemodialysis Endotoxin Water quality Membrane permeability
topic	misc RC870-923 misc Hemodialysis misc Endotoxin misc Water quality misc Membrane permeability misc Diseases of the genitourinary system. Urology
topic_unstemmed	misc RC870-923 misc Hemodialysis misc Endotoxin misc Water quality misc Membrane permeability misc Diseases of the genitourinary system. Urology
topic_browse	misc RC870-923 misc Hemodialysis misc Endotoxin misc Water quality misc Membrane permeability misc Diseases of the genitourinary system. Urology
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title	Assessment of the association between increasing membrane pore size and endotoxin permeability using a novel experimental dialysis simulation set-up
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title_full	Assessment of the association between increasing membrane pore size and endotoxin permeability using a novel experimental dialysis simulation set-up
author_sort	Eva Schepers
journal	BMC Nephrology
journalStr	BMC Nephrology
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author_browse	Eva Schepers Griet Glorieux Sunny Eloot Michael Hulko Adriana Boschetti-de-Fierro Werner Beck Bernd Krause Wim Van Biesen
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class	RC870-923
format_se	Elektronische Aufsätze
author-letter	Eva Schepers
doi_str_mv	10.1186/s12882-017-0808-y
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title_sort	assessment of the association between increasing membrane pore size and endotoxin permeability using a novel experimental dialysis simulation set-up
callnumber	RC870-923
title_auth	Assessment of the association between increasing membrane pore size and endotoxin permeability using a novel experimental dialysis simulation set-up
abstract	Abstract Background Membranes with increasing pore size are introduced to enhance removal of large uremic toxins with regular hemodialysis. These membranes might theoretically have higher permeability for bacterial degradation products. In this paper, permeability for bacterial degradation products of membranes of comparable composition with different pore size was investigated with a new in vitro set-up that represents clinical flow and pressure conditions. Methods Dialysis was simulated with an AK200 machine using a low-flux, high-flux, medium cut-off (MCO) or high cut-off (HCO) device (n = 6/type). A polyvinylpyrrolidone-solution (PVP) was recirculated at blood side. At dialysate side, a challenge solution containing a filtrated lysate of two water-borne bacteria (Pseudomonas aeruginosa and Pelomononas saccharophila) was infused in the dialysate flow (endotoxin ≥ 4EU/ml). Blood and dialysate flow were set at 400 and 500 ml/min for 60 min. PVP was sampled before (PVPpre) and after (PVPpost) the experiment and dialysate after 5 and 55 min. Limulus Amebocyte Lysate (LAL) test was performed. Additionally, samples were incubated with a THP-1 cell line (24 h) and IL-1β levels were measured evaluating biological activity. Results The LAL-assay confirmed presence of 9.5 ± 7.4 EU/ml at dialysate side. For none of the devices the LAL activity in PVPpre vs. PVPpost was significantly different. Although more blood side PVP solutions had a detectable amount of endotoxin using a highly sensitive LAL assay in the more open vs traditional membranes, the permeability for endotoxins of the 4 tested dialysis membranes was not significantly different but the number of repeats is small. None of the PVP solutions induced IL-1β in the THP-1 assay. Conclusions A realisitic in vitro dialysis was developed to assess membrane translocation of bacterial products. LAL activity on the blood side after endotoxin exposure did not change for all membranes. Also, none of the PVPpost solutions induced IL-1β in the THP-1 bio-assay.
abstractGer	Abstract Background Membranes with increasing pore size are introduced to enhance removal of large uremic toxins with regular hemodialysis. These membranes might theoretically have higher permeability for bacterial degradation products. In this paper, permeability for bacterial degradation products of membranes of comparable composition with different pore size was investigated with a new in vitro set-up that represents clinical flow and pressure conditions. Methods Dialysis was simulated with an AK200 machine using a low-flux, high-flux, medium cut-off (MCO) or high cut-off (HCO) device (n = 6/type). A polyvinylpyrrolidone-solution (PVP) was recirculated at blood side. At dialysate side, a challenge solution containing a filtrated lysate of two water-borne bacteria (Pseudomonas aeruginosa and Pelomononas saccharophila) was infused in the dialysate flow (endotoxin ≥ 4EU/ml). Blood and dialysate flow were set at 400 and 500 ml/min for 60 min. PVP was sampled before (PVPpre) and after (PVPpost) the experiment and dialysate after 5 and 55 min. Limulus Amebocyte Lysate (LAL) test was performed. Additionally, samples were incubated with a THP-1 cell line (24 h) and IL-1β levels were measured evaluating biological activity. Results The LAL-assay confirmed presence of 9.5 ± 7.4 EU/ml at dialysate side. For none of the devices the LAL activity in PVPpre vs. PVPpost was significantly different. Although more blood side PVP solutions had a detectable amount of endotoxin using a highly sensitive LAL assay in the more open vs traditional membranes, the permeability for endotoxins of the 4 tested dialysis membranes was not significantly different but the number of repeats is small. None of the PVP solutions induced IL-1β in the THP-1 assay. Conclusions A realisitic in vitro dialysis was developed to assess membrane translocation of bacterial products. LAL activity on the blood side after endotoxin exposure did not change for all membranes. Also, none of the PVPpost solutions induced IL-1β in the THP-1 bio-assay.
abstract_unstemmed	Abstract Background Membranes with increasing pore size are introduced to enhance removal of large uremic toxins with regular hemodialysis. These membranes might theoretically have higher permeability for bacterial degradation products. In this paper, permeability for bacterial degradation products of membranes of comparable composition with different pore size was investigated with a new in vitro set-up that represents clinical flow and pressure conditions. Methods Dialysis was simulated with an AK200 machine using a low-flux, high-flux, medium cut-off (MCO) or high cut-off (HCO) device (n = 6/type). A polyvinylpyrrolidone-solution (PVP) was recirculated at blood side. At dialysate side, a challenge solution containing a filtrated lysate of two water-borne bacteria (Pseudomonas aeruginosa and Pelomononas saccharophila) was infused in the dialysate flow (endotoxin ≥ 4EU/ml). Blood and dialysate flow were set at 400 and 500 ml/min for 60 min. PVP was sampled before (PVPpre) and after (PVPpost) the experiment and dialysate after 5 and 55 min. Limulus Amebocyte Lysate (LAL) test was performed. Additionally, samples were incubated with a THP-1 cell line (24 h) and IL-1β levels were measured evaluating biological activity. Results The LAL-assay confirmed presence of 9.5 ± 7.4 EU/ml at dialysate side. For none of the devices the LAL activity in PVPpre vs. PVPpost was significantly different. Although more blood side PVP solutions had a detectable amount of endotoxin using a highly sensitive LAL assay in the more open vs traditional membranes, the permeability for endotoxins of the 4 tested dialysis membranes was not significantly different but the number of repeats is small. None of the PVP solutions induced IL-1β in the THP-1 assay. Conclusions A realisitic in vitro dialysis was developed to assess membrane translocation of bacterial products. LAL activity on the blood side after endotoxin exposure did not change for all membranes. Also, none of the PVPpost solutions induced IL-1β in the THP-1 bio-assay.
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title_short	Assessment of the association between increasing membrane pore size and endotoxin permeability using a novel experimental dialysis simulation set-up
url	https://doi.org/10.1186/s12882-017-0808-y https://doaj.org/article/c8f0b2e217534ed5a3e975d6885a9d18 http://link.springer.com/article/10.1186/s12882-017-0808-y https://doaj.org/toc/1471-2369
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author2	Griet Glorieux Sunny Eloot Michael Hulko Adriana Boschetti-de-Fierro Werner Beck Bernd Krause Wim Van Biesen
author2Str	Griet Glorieux Sunny Eloot Michael Hulko Adriana Boschetti-de-Fierro Werner Beck Bernd Krause Wim Van Biesen
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up_date	2024-07-03T19:48:09.109Z
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