Úvod: Adjustabilní gastrická bandáž (AGB) patřila k oblíbeným bariatrickým metodám. Z dlouhodobého hlediska u více než poloviny operovaných selhává, je neúčinná a je potřeba ji ve velké míře odstranit. Z tohoto důvodu je od používání této metody celosvětově ustupováno. Mezi nejčastěji používané revizní bariatrické operace po odstraněné AGB patří sleeve gastrektomie (SG) a Roux-Y gastrický bypass (RYGB). Kazuistika: V kazuistice prezentujeme případ nemocné, které byla odstraněna AGB a provedena tubulizace žaludku s nepříznivým průběhem ve smyslu rozvoje stenózy tubulizovaného žaludku. Proto jí byl proveden jako další revizní výkon RYGB s dobrým efektem. Závěr: Revizní operace jsou technicky náročnější než primární výkony a mají vyšší procento komplikací. Mezi nejčastější revizní operace patří SG a RYGB. Po SG se může vytvořit stenóza tubulizovaného žaludku, která má negativní vliv na nutriční stav nemocného a kvalitu jeho života. Toto lze řešit endoskopickou dilatací a při inefektivitě konverzí na RYGB
Introduction: Adjustable gastric banding (AGB) used to be a popular bariatric procedure. However, it fails in more than half of those operated on in the long term, becomes ineffective and must be removed. Therefore, the use of AGB has been in decline globally. Sleeve gastrectomy (SG) and Roux-en-Y gastric bypass (RYGB) are the most used bariatric revision surgeries when AGB is removed. Case report: We present the case of a woman after AGB removal and conversion to SG who developed a stenosis of the sleeve. Therefore, a decision was made to convert to RYGB with a good effect. Conclusion: Revisional procedures are more technically challenging than primary procedures and have higher complication rates. The most performed revisional operations include SG and RYGB. Stenosis of the sleeve can occur after SG, with a negative impact on the patient’s nutritional status and quality of life. This can be managed by endoscopic dilatation, and where this solution proves ineffective, RYGB can be indicated.
- MeSH
- bariatrická chirurgie MeSH
- dospělí MeSH
- gastrektomie metody MeSH
- gastroplastika metody škodlivé účinky MeSH
- kvalita života MeSH
- lidé MeSH
- morbidní obezita chirurgie MeSH
- reoperace metody MeSH
- stenóza chirurgie MeSH
- žaludeční bypass * metody škodlivé účinky MeSH
- Check Tag
- dospělí MeSH
- lidé MeSH
- ženské pohlaví MeSH
- Publikační typ
- kazuistiky MeSH
Acute liver failure (ALF) is known for extremely high mortality rate, the result of widespread damage of hepatocytes. Orthotopic liver transplantation is the only effective therapy but its application is limited by the scarcity of donor organs. Given the importance in the liver biology of Wnt/beta-catenin signaling pathway, we hypothesized that its stimulation could enhance hepatocyte regeneration and attenuate the course of thioacetamide (TAA)-induced ALF in Lewis rats. Chronic treatment with Wnt agonist was started either immediately after hepatotoxic insult ("early treatment") or when signs of ALF had developed ("late treatment"). Only 23 % of untreated Lewis rats survived till the end of experiment. They showed marked increases in plasma alanine aminotransferase (ALT) activity and bilirubin and ammonia (NH3) levels; plasma albumin decreased significantly. "Early" and "late" Wnt agonist treatment raised the final survival rate to 69 % and 63 %, respectively, and normalized ALT, NH3, bilirubin and albumin levels. In conclusion, the results show that treatment with Wnt agonist attenuates the course of TAA-induced ALF in Lewis rats, both with treatment initiated immediately after hepatotoxic insult and in the phase when ALF has already developed. Thus, the pharmacological stimulation of Wnt/beta-catenin signaling pathway can present a new approach to ALF treatment.
- MeSH
- akutní selhání jater chemicky indukované farmakoterapie metabolismus MeSH
- beta-katenin metabolismus MeSH
- játra účinky léků metabolismus MeSH
- potkani inbrední LEW MeSH
- preklinické hodnocení léčiv MeSH
- proteiny Wnt agonisté MeSH
- signální dráha Wnt účinky léků MeSH
- thioacetamid MeSH
- zvířata MeSH
- Check Tag
- mužské pohlaví MeSH
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
Acute liver failure (ALF) is a clinical syndrome with high mortality rate, resulting from widespread hepatocyte damage. Its pathophysiological background is still poorly understood and preclinical studies evaluating pathophysiology and new potential therapeutic measures are needed. The model of ALF induced by administration of thioacetamide (TAA) in Lewis rats is recommended as optimal; however, the limitation of previous studies was that they were performed predominantly in male rats. In view of the growing recognition that sex as a biological variable should be taken into consideration in preclinical research, we examined its role in the development of TAA-induced ALF in Lewis rats. We found that, first, intact male Lewis rats showed lower survival rate than their female counterparts, due to augmented liver injury documented by higher plasma ammonia, and bilirubin levels and alanine aminotransferase activity. Second, in female rats castration did not alter the course of TAA-induced ALF whereas in the male gonadectomy improved the survival rate and attenuated liver injury, reducing it to levels observed in their female counterparts. In conclusion, we found that Lewis rats show a remarkable sexual dimorphism with respect to TAA-induced ALF, and male rats display dramatically poorer prognosis as compared with the females. We showed that testosterone is responsible for the deterioration of the course of TAA-induced ALF in male rats. In most general terms, our findings indicate that in the preclinical studies of the pathophysiology and treatment of ALF (at least of the TAA-induced form) the sex-linked differences should be seriously considered.
- MeSH
- akutní selhání jater chemicky indukované metabolismus patologie MeSH
- karcinogeny toxicita MeSH
- krysa rodu rattus MeSH
- modely nemocí na zvířatech MeSH
- potkani inbrední LEW MeSH
- sexuální faktory MeSH
- testosteron metabolismus MeSH
- thioacetamid toxicita MeSH
- zvířata MeSH
- Check Tag
- krysa rodu rattus MeSH
- mužské pohlaví MeSH
- ženské pohlaví MeSH
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
Acute liver failure (ALF) is a clinical syndrome resulting from widespread damage of hepatocytes, with extremely high mortality rate. Urgent orthotopic liver transplantation was shown to be the most effective therapy for ALF but this treatment option is limited by scarcity of donor organs. Therefore, hepatocyte transplantation (Tx) has emerged as a new therapeutical measure for ALF, however, the first clinical applications proved unsatisfactory. Apparently, extensive preclinical studies are needed. Our aim was to examine if hepatocytes isolated from transgenic "firefly luciferase" Lewis rats into the recipient liver would attenuate the course of thioacetamide (TAA)-induced ALF in Lewis rats. Untreated Lewis rats after TAA administration showed a profound decrease in survival rate; no animal survived 54 h. The rats showed marked increases in plasma alanine aminotransferase (ALT) and aspartate aminotransferase (AST) activities, in plasma level of bilirubin and ammonia (NH(3)), and in a significant decrease in plasma albumin. Hepatocyte Tx attenuated the course of TAA-induced ALF Lewis rats which was reflected by improved survival rate and reduced degree of liver injury showing as lowering of elevated plasma ALT, AST, NH(3) and bilirubin levels and increasing plasma albumin. In addition, bioluminescence imaging analyses have shown that in the TAA-damaged livers the transplanted hepatocyte were fully viable throughout the experiment. In conclusion, the results show that hepatocyte Tx into the liver can attenuate the course of TAA-induced ALF in Lewis rats. This information should be considered in attempts to develop new therapeutic approaches to the treatment of ALF.
- MeSH
- akutní selhání jater chemicky indukované mortalita terapie MeSH
- hepatocyty transplantace MeSH
- krysa rodu rattus MeSH
- míra přežití trendy MeSH
- potkani inbrední LEW MeSH
- thioacetamid toxicita MeSH
- transplantace buněk metody MeSH
- zvířata MeSH
- Check Tag
- krysa rodu rattus MeSH
- mužské pohlaví MeSH
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
Acute liver failure (ALF) is a clinical condition with very high mortality rate. Its pathophysiological background is still poorly understood, which necessitates a search for optimal experimental ALF models with features resembling those of the human disorder. Taking into consideration reproducibility of induction of ALF, adequate animal size, cost of animals, the required time gap between insult and death of animals ("therapeutic window"), potential risk to investigator and other aspects, administration of thioacetamide (TAA) in rats is currently most recommended. However, the fundamental details of this ALF model have not yet been evaluated. This prompted us to investigate, first, the course of ALF as induced by intraperitoneal TAA at doses increasing from 175 to 700 mg/kg BW per day. The animals' survival rate, plasma alanine and aspartate aminotransferase activities, and bilirubin and ammonia levels were determined over the follow-up period. Second, we examined whether Wistar and Lewis rats exhibit any differences in the course of ALF induced by different TAA doses. We found that the optimal dose for ALF induction in rats is 350 mg.kg(-1) i.p., given as a single injection. Wistar rats proved more susceptible to the development of TAA-induced ALF compared with Lewis rats. Collectively, our present findings provide a sound methodological background for experimental studies aimed at evaluation of pathophysiology and development of new approaches in the therapy of ALF.
- MeSH
- akutní selhání jater chemicky indukované patologie MeSH
- druhová specificita MeSH
- játra patologie MeSH
- karcinogeny aplikace a dávkování toxicita MeSH
- krysa rodu rattus MeSH
- potkani inbrední LEW MeSH
- potkani Wistar MeSH
- thioacetamid aplikace a dávkování toxicita MeSH
- vztah mezi dávkou a účinkem léčiva MeSH
- zvířata MeSH
- Check Tag
- krysa rodu rattus MeSH
- mužské pohlaví MeSH
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- srovnávací studie MeSH
- MeSH
- hepatocyty MeSH
- lidé MeSH
- modely u zvířat MeSH
- transplantace jater MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- klinické zkoušky MeSH
