Závěrečná zpráva o řešení grantu Interní grantové agentury MZ ČR
31 l., 27 l. příl. : il., tab. ; 31 cm
The outcomes as decrease of extracellular brain ammoniac, lactate and energetic needs changes after using FPSA in ALF treatment has never been published before. Team of authors is aiming to proof the benefit of FPSA in ALF treatment, decrease of energetic needs of the brain in large experimental model, minipig one respectively. On top of that authors want to test hemodynamics and systemic inflammatory changes. Above mentioned benefits from FPSA might positively affect ASF treatment outcomes. Project results will be used to design guidelines for ALF treatment to be used in human medicine.
Doposud nebyl experimentálně prokázán vliv FPSA na hladinu patogenních metabolitů (amoniak, glutamin, glutamát) v cerebrálním intersticiu a na energetický metabolismus mozku v průběhu ASJ. Řešitelský tým projektu si klade za cíl prokázat, že FPSA v léčběexperimentálního chirurgického resekčního modelu ASJ u velkého laboratorního zvířete (prase) pozitivně ovlivňuje patologické děje vedoucí k rozvoji mozkového otoku u ASJ a tím příznivě ovlivňuje jeho průběh. Dále chtějí autoři zhodnotit, jak FPSA ovlivňuje hemodynamiku a systémovou zánětlivou odpověď organizmu v průběhu AJS. Výsledky studie přispějí k vytvoření doporučeného diagnostického a terapeutického postupu aplikovatelného v klinické praxi.
- MeSH
- akutní selhání jater diagnóza terapie MeSH
- experimenty na zvířatech MeSH
- extracelulární tekutina MeSH
- glutamin analýza MeSH
- hemodynamika MeSH
- klinické lékařství MeSH
- mozek metabolismus MeSH
- mozkomíšní mok MeSH
- plazmatické buňky MeSH
- prasata MeSH
- Konspekt
- Patologie. Klinická medicína
- NLK Obory
- hepatologie
- neurologie
- NLK Publikační typ
- závěrečné zprávy o řešení grantu IGA MZ ČR
OBJECTIVE: Acute liver failure (ALF) is a rare disease with a bad prognosis. Its start is accompanied by haemodynamic instability. The aim of our study was to evaluate the influence of fractionated plasmatic separation and adsorption (FPSA) on body haemodynamics using a large animal experimental model of ALF. METHODS: ALF was induced by the devascularisation of 21 laboratory pigs. FPSA was applied in 14 animals and seven animals formed a control group. Values of systemic vascular resistance index (SVRI), heart rate (HR), pulmonary artery wedge pressure (PAWP) and cardiac index (CI) at hours 3, 6, 9 and 12 of the experiment were compared. The values from laboratory tests conducted with FPSA-treated vs. untreated ALF animals were compared using Student's t-test, paired or unpaired, as required, and Mann-Whitney U-test using EXCEL and QUATRO spreadsheet applications. RESULTS: We found no significant differences in mean arterial pressure, SVRI, or plasma lactate (p>0.05) in the FPSA-treated group but there was a significant decrease(p<0.05) in intracranial pressure (ICP). Furthermore, we observed a significant decrease in HR at hour 3. A significant increase in CI at hour 9 and a significant decrease in pulmonary artery wedge pressure at hours 6 and 12 were also observed. CONCLUSION: Our study of FPSA application (Prometheus device) for treatment of experimental ALF in a large animal model did not confirm the earlier reported development of changes in body haemodynamics.
- MeSH
- akutní selhání jater patofyziologie terapie MeSH
- hemodiafiltrace škodlivé účinky přístrojové vybavení metody MeSH
- hemodynamika fyziologie MeSH
- modely nemocí na zvířatech MeSH
- prasata MeSH
- zvířata MeSH
- Check Tag
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- klinické zkoušky MeSH
- práce podpořená grantem MeSH
BACKGROUND: Cerebral edema is a well-recognized and potentially fatal complication of acute liver failure (ALF). The effectiveness of treatments that address intracranial hypertension is generally assessed by measuring intracranial pressure (ICP). The aim of this study was to determine the role of cerebral microdialysis in monitoring the efficacy of fractionated plasma separation and adsorption (FPSA) treatment for ALF. We hypothesized that in ALF cerebral microdialysis reflects the benefits of FPSA treatment on cerebral edema before ICP. METHODS: A surgical resection model of ALF was used in 21 pigs. We measured plasma ammonia concentration, brain concentrations of glucose, lactate, pyruvate, glutamate and glutamine, and ICP. Animals were randomized into three groups: in one group eight animals received 6 hours of FPSA treatment 2 hours after induction of ALF; in another group 10 animals received supportive treatment for ALF only; and in the final group three underwent sham surgery. RESULTS: The ICP was significantly higher in the ALF group than in the FPSA group 9 hours after surgery. The lactate/pyruvate (L/P) ratio was significantly lower in the FPSA group than the ALF group 5 hours after surgery, before any significant difference in ICP was detected. Indeed, significant changes in the L/P ratio could be observed within 1 hour of treatment. Glutamine levels were significantly lower in the FPSA group than the ALF group between 6 hours and 10 hours after surgery. CONCLUSIONS: Brain lactate/pyruvate ratio and concentration of glutamine measured by cerebral microdialysis reflected the beneficial effects of FPSA treatment on cerebral metabolism more precisely and rapidly than ICP in pigs with fulminant ALF. The role of glutamine as a marker of the efficacy of FPSA treatment for ALF appears promising, but needs further evaluation.
- MeSH
- akutní selhání jater komplikace krev terapie MeSH
- amoniak krev MeSH
- časové faktory MeSH
- edém mozku etiologie metabolismus prevence a kontrola MeSH
- glukosa metabolismus MeSH
- glutamin metabolismus MeSH
- intrakraniální hypertenze etiologie prevence a kontrola MeSH
- intrakraniální tlak MeSH
- kyselina glutamová metabolismus MeSH
- kyselina mléčná metabolismus MeSH
- kyselina pyrohroznová metabolismus MeSH
- mikrodialýza * MeSH
- mimotělní oběh MeSH
- prasata MeSH
- sorpční detoxikace * MeSH
- velký mozek * metabolismus MeSH
- zvířata MeSH
- Check Tag
- zvířata MeSH
- Publikační typ
- práce podpořená grantem MeSH
OBJECTIVES: Extracorporeal liver support (ELS) may play a role in bridging therapy in patients with acute liver failure (ALF). The aim of this study was to compare the influence of nonbiological and biological methods on intracranial pressure (ICP) in an animal model of ALF. METHODS: A surgical devascularization model of ALF in pigs (35-40 kg) was used. Elimination therapy started after the onset of hypoglycemia. Biochemical parameters (bilirubin, ammonia, lactate, etc.) as well as ICP and cerebral perfusion pressure (CPP) were monitored for 12 hours. Of the total 31 pigs with ALF, 14 animals were treated by fractionated plasma separation and absorption (FPSA), 10 were treated with a bioartificial liver (BAL), and 7 animals were used as a control group. RESULTS: FPSA and BAL treatment started on average 3 hours 17 minutes and 2 hours 21 minutes, after devascularization and lasted for 5 hours 54 minutes and 5 hours 43 minutes, respectively. Ammonia levels were lower in the FPSA group, and bilirubin levels differed significantly in both the FPSA and BAL groups compared with controls. However, ICP values were reduced more effectively in pigs treated by FPSA: 19.1 vs. 27.0 mm Hg at 9 hours, 22.5 vs. 28.7 mm Hg at 11 hours, and 24.0 vs. 33.0 mm Hg at 12 hours (p<0.05). CONCLUSIONS: The artificial liver support system FPSA reduced ICP values more effectively than the Performer O. Liver RanD BAL system. Compared with this BAL system, the nonbiological elimination method of FPSA is a simpler application with the advantage that it can be applied in a more continuous way.
- MeSH
- akutní selhání jater krev komplikace patofyziologie terapie MeSH
- amoniak krev MeSH
- bilirubin krev MeSH
- biologické markery krev MeSH
- časové faktory MeSH
- design vybavení MeSH
- hemoperfuze přístrojové vybavení MeSH
- intrakraniální hypertenze krev etiologie patofyziologie terapie MeSH
- intrakraniální tlak * MeSH
- játra umělá * MeSH
- kyselina mléčná krev MeSH
- modely nemocí na zvířatech MeSH
- mozkový krevní oběh MeSH
- plazmaferéza přístrojové vybavení MeSH
- prasata MeSH
- zvířata MeSH
- Check Tag
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- srovnávací studie MeSH
- Klíčová slova
- molecular adsorbent recirculating system, fractionated plasma separation and adsorption, FPSA, bioeliminační metody, BAL systémy, FPSA,
- MeSH
- akutní selhání jater * terapie MeSH
- bioreaktory MeSH
- hepatocyty MeSH
- intrakraniální tlak MeSH
- lidé MeSH
- Mars MeSH
- mimotělní oběh * přístrojové vybavení MeSH
- miniaturní prasata MeSH
- modely nemocí na zvířatech MeSH
- sorpční detoxikace * MeSH
- transplantace jater MeSH
- zdravotnické prostředky MeSH
- zvířata MeSH
- Check Tag
- lidé MeSH
- zvířata MeSH
Cíl studie: Zhodnotit vliv frakcionované plazmatické separace a adsorpce (FPSA) na hemodynamiku u experimentálního modelu akutního jaterního selhání (ASJ) na velkém laboratorním zvířeti ve srovnání s kontrolní skupinou. Typ studie: Experimentální studie. Pracoviště: ARO – Ústřední vojenská nemocnice v Praze. Materiál a metoda: Celkem u 21 laboratorních prasat, hmotnosti 25–45 kg jsme vyvolali ASJ metodou chirurgické devaskularizace. U 14 z nich jsme ASJ léčili pomocí FPSA. Dalších 7 zvířat jsme zařadili do kontrolní skupiny. Během pokusu jsme monitorovali parametry hemodynamiky v 0., 3., 6., 9. a 12. hodině, biochemické parametry a ICP. Data jsme statisticky analyzovali pomocí T-testu a Mannova-Whitneova neparametrického testu, za významný byl považován rozdíl p < 0,05. Výsledky: V obou skupinách jsme zaznamenali signifikantní snížení indexované systémové vaskulární rezistence (SVRI) ve 3., 6., 9. a 12. hodině a signifikantní zvýšení tepové frekvence (HR) a indexovaného srdečního výdeje (CI) v 6., 9. a 12. hodině v porovnání s hodnotami na začátku pokusu. U skupiny zvířat s léčbou FPSA jsme nenašli signifikantní rozdíly středního arteriálního tlaku (MAP), indexované systémové vaskulární rezistence (SVRI) a laktátu (p > 0,05) ve srovnání s kontrolní skupinou. Významné snížení intrakraniálního tlaku (ICP) jsme pozorovali u skupiny léčené FPSA (p < 0,05). Ve 3. hodině jsme zaznamenali signifikantní snížení tepové frekvence (HR) ve skupině s FPSA. V 9. hodině bylo signifikantní zvýšení indexovaného srdečního výdeje (CI) a v 6. a 12. hodině signifikantní snížení tlaku v zaklínění (PAWP). Závěr: Naše experimentální práce s léčbou akutního jaterního selhání pomocí přístroje Prometheus u velkého laboratorního zvířete neprokázala signifikantní změny hemodynamických parametrů.
Objective: Acute liver failure (ALF) is a relatively sparse disease with a very poor prognosis. Its onset is accompanied by haemodynamic instability. The aim of our study was to evaluate the influence of fractioned plasmatic separation and adsorption (FPSA) on the haemodynamics using an ALF experimental model in large laboratory animals, comparing the results of the experimental and control groups. Design: Experimental study. Setting: Department of Anaesthesiology and Resuscitation, Central Military Hospital, Prague. Materials and methods: Our experiment included 21 laboratory pigs ( 25–45 kg ) with ALF induced by surgical devascularization. The onset of ALF was documented by hypoglycaemia (< 3.5 mmol/l). FPSA therapy was commenced in 14 of the animals, the remaining animals were used as the control group. We reported the haemodynamic parameters at hour 0, 3, 6, 9 and 12 of our experiment, as well as the biochemical parameters and intracranial pressure (ICP). The results were statistically analysed using the T-test and Mann-Whitney’s test. A difference greater than p <0.05 was considered significant. The experiment was stopped 12 hours after the beginning of ALF. Results: As compared with the values measured at the beginning of our experiment, a significant decrease of systemic vascular resistance index (SVRI) determined at hour 3, 6, 9, and 12 of our experiment, and a significant increase of the heart rate (HR) and cardiac index (CI) at hour 6, 9, and 12 of the experiment were noted in both the groups. Compared to the control group, we did not find any significant difference of mean arterial pressure (MAP), systemic vascular resistance index (SVRI) and lactate (p > 0.05) in the experimental group of animals treated with FPSA therapy. A significant decrease of ICP (p < 0.05), a significant decrease of HR at hour 3, a significant increase of CI at hour 9 and a significant decrease of pulmonary artery wedge pressure (PAWP) at hours 6 and 12 were observed. Conclusion: Our study did not show significant changes of the haemodynamic parameters during the treatment of acute liver failure using the Prometheus device in large laboratory animals.
- MeSH
- akutní selhání jater MeSH
- cévní rezistence fyziologie imunologie účinky léků MeSH
- experimenty na zvířatech MeSH
- financování organizované MeSH
- hemodynamika fyziologie imunologie účinky léků MeSH
- plicní tlak v zaklínění fyziologie imunologie účinky léků MeSH
- pooperační péče metody využití MeSH
- prasata MeSH
- sorpční detoxikace metody přístrojové vybavení využití MeSH
- srdeční frekvence fyziologie imunologie účinky léků MeSH
- statistika jako téma MeSH
- zvířata MeSH
- Check Tag
- zvířata MeSH
BACKGROUND: The aim of the study was to determine the influence of fractionated plasma separation and absorption (FPSA) on intracranial pressure (ICP) in acute liver failure (ALF). METHODS: A surgical model of ALF in pigs (35-40 kg) was used. We compared laboratory data and haemodynamic parameters from the ALF control group to the ALF group treated by Prometheus using ANOVA with repeated measures and grouping factors, by calculating the area under the curve, and by the Mann-Whitney rank test. RESULTS: Bilirubin levels differed significantly in favour of the FPSA treatment group: after 6 h 12.81 +/- 6.54 versus 29.84 +/- 9.99, after 9 h 11.94 +/- 4.14 versus 29.95 +/- 12.36 (p < 0.01) and after 12 h 13.88 +/- 6.31 versus 26.10 +/- 12.23 mmol/l (p < 0.05). ICP values differed significantly in favour of the FPSA treatment group: after 9 h 19.1 +/- 4.09 versus 24.1 +/- 2.85 (p < 0.01), after 10 h 21.9 +/- 3.63 versus 25.1 +/- 2.19, after 11 h 22.5 +/- 3.98 versus 26.3 +/- 3.50, and after 12 h 24.0 +/- 4.66 versus 29.8 +/- 5.88 mm Hg (p < 0.05). CONCLUSION: The authors demonstrated that a significant decrease in ICP was found in pigs with ALF following treatment by FPSA. Copyright 2009 S. Karger AG, Basel.
- MeSH
- akutní selhání jater patofyziologie terapie MeSH
- hemodiafiltrace MeSH
- intrakraniální tlak MeSH
- prasata MeSH
- zvířata MeSH
- Check Tag
- zvířata MeSH
- Publikační typ
- hodnotící studie MeSH
- práce podpořená grantem MeSH