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Šimják P, Petr T, Kaslová B, Fejfar T, Hůlek P, Pařízek A, Vítek L. Ursodeoxycholic acid use in lactating female patients is associated with clinically negligible concentrations of this bile acid in breast milk. Sci Rep 2022; 12:19543. [PMID: 36379995 PMCID: PMC9666662 DOI: 10.1038/s41598-022-24253-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Accepted: 11/11/2022] [Indexed: 11/16/2022] Open
Abstract
In the literature on the safety of ursodeoxycholic acid (UDCA) during breastfeeding, insufficient data has been reported to date. Thus, the aim of our study was to analyze bile acid (BA) concentrations in breast milk in a cohort of patients, treated with UDCA, and with various cholestatic liver diseases. The study was carried out on a cohort of 20 patients with various cholestatic diseases. All the patients were treated with UDCA (500-1500 mg daily). Concentrations of BA, sampled on day 3 after delivery were analyzed using the GS-MS technique, and then compared to untreated women. Total BA concentrations in the breast milk of the UDCA-treated patients were equal to those of the untreated women controls (3.2 ± 1 vs. 3.2 ± 0.2 µmol/L, respectively). The UDCA concentrations in breast milk remained negligible in UDCA-treated patients (0.69 µmol/L), and in any event did not contribute to the newborn BA pool. No apparent side-effects of the maternal UDCA treatment were observed in any newborn infant, and no deterioration in postnatal development was observed during the routine 1-year follow-ups. Therapeutic administration of UDCA during lactation is safe for breastfed babies since UDCA only gets into breast milk in negligible amounts. UDCA treatment should be allowed and included into the guidelines for the therapy of cholestatic diseases in breastfeeding mothers.
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Affiliation(s)
- Patrik Šimják
- grid.411798.20000 0000 9100 9940Department of Gynecology and Obstetrics, General University Hospital in Prague and 1st Faculty of Medicine, Prague, Czech Republic
| | - Tomáš Petr
- grid.411798.20000 0000 9100 9940Institute of Medical Biochemistry and Laboratory Diagnostics, General University Hospital in Prague and 1st Faculty of Medicine, Prague, Czech Republic
| | - Barbora Kaslová
- grid.411798.20000 0000 9100 9940Department of Gynecology and Obstetrics, General University Hospital in Prague and 1st Faculty of Medicine, Prague, Czech Republic
| | - Tomáš Fejfar
- grid.412539.80000 0004 0609 2284Department of Internal Medicine, University Hospital in Hradec Králové and Faculty of Medicine in Hradec Králové, Hradec Králové, Czech Republic
| | - Petr Hůlek
- grid.412539.80000 0004 0609 2284Department of Internal Medicine, University Hospital in Hradec Králové and Faculty of Medicine in Hradec Králové, Hradec Králové, Czech Republic
| | - Antonín Pařízek
- grid.411798.20000 0000 9100 9940Department of Gynecology and Obstetrics, General University Hospital in Prague and 1st Faculty of Medicine, Prague, Czech Republic
| | - Libor Vítek
- grid.411798.20000 0000 9100 9940Institute of Medical Biochemistry and Laboratory Diagnostics, General University Hospital in Prague and 1st Faculty of Medicine, Prague, Czech Republic ,grid.4491.80000 0004 1937 116X4th Department of Internal Medicine, General University Hospital in Prague and 1st Faculty of Medicine, Charles University in Prague, U Nemocnice 2, Prague 2, 128 08 Czech Republic
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Kaválková P, Mráz M, Trachta P, Kloučková J, Cinkajzlová A, Lacinová Z, Haluzíková D, Beneš M, Vlasáková Z, Burda V, Novák D, Petr T, Vítek L, Pelikánová T, Haluzík M. Endocrine effects of duodenal-jejunal exclusion in obese patients with type 2 diabetes mellitus. J Endocrinol 2016; 231:11-22. [PMID: 27474690 DOI: 10.1530/joe-16-0206] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Accepted: 07/29/2016] [Indexed: 01/20/2023]
Abstract
Duodenal-jejunal bypass liner (DJBL) is an endoscopically implantable device designed to noninvasively mimic the effects of gastrointestinal bypass operations by excluding the duodenum and proximal jejunum from the contact with ingested food. The aim of our study was to assess the influence of DJBL on anthropometric parameters, glucose regulation, metabolic and hormonal profile in obese patients with type 2 diabetes mellitus (T2DM) and to characterize both the magnitude and the possible mechanisms of its effect. Thirty obese patients with poorly controlled T2DM underwent the implantation of DJBL and were assessed before and 1, 6 and 10months after the implantation, and 3months after the removal of DJBL. The implantation decreased body weight, and improved lipid levels and glucose regulation along with reduced glycemic variability. Serum concentrations of fibroblast growth factor 19 (FGF19) and bile acids markedly increased together with a tendency to restoration of postprandial peak of GLP1. White blood cell count slightly increased and red blood cell count decreased throughout the DJBL implantation period along with decreased ferritin, iron and vitamin B12 concentrations. Blood count returned to baseline values 3months after DJBL removal. Decreased body weight and improved glucose control persisted with only slight deterioration 3months after DJBL removal while the effect on lipids was lost. We conclude that the implantation of DJBL induced a sustained reduction in body weight and improvement in regulation of lipid and glucose. The increase in FGF19 and bile acids levels could be at least partially responsible for these effects.
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Affiliation(s)
- Petra Kaválková
- Institute of Medical Biochemistry and Laboratory DiagnosticsFirst Faculty of Medicine, Charles University in Prague and General University Hospital, Prague, Czech Republic
| | - Miloš Mráz
- Third Department of Medicine - Department of Endocrinology and MetabolismFirst Faculty of Medicine, Charles University in Prague and General University Hospital, Prague, Czech Republic
| | - Pavel Trachta
- Third Department of Medicine - Department of Endocrinology and MetabolismFirst Faculty of Medicine, Charles University in Prague and General University Hospital, Prague, Czech Republic
| | - Jana Kloučková
- Institute of Medical Biochemistry and Laboratory DiagnosticsFirst Faculty of Medicine, Charles University in Prague and General University Hospital, Prague, Czech Republic
| | - Anna Cinkajzlová
- Institute of Medical Biochemistry and Laboratory DiagnosticsFirst Faculty of Medicine, Charles University in Prague and General University Hospital, Prague, Czech Republic
| | - Zdeňka Lacinová
- Institute of Medical Biochemistry and Laboratory DiagnosticsFirst Faculty of Medicine, Charles University in Prague and General University Hospital, Prague, Czech Republic Third Department of Medicine - Department of Endocrinology and MetabolismFirst Faculty of Medicine, Charles University in Prague and General University Hospital, Prague, Czech Republic
| | - Denisa Haluzíková
- Department of Sports MedicineFirst Faculty of Medicine, Charles University in Prague and General University Hospital, Prague, Czech Republic
| | - Marek Beneš
- Department of Gastroenterology and HepatologyInstitute for Clinical and Experimental Medicine, Prague, Czech Republic
| | - Zuzana Vlasáková
- Department of DiabetesInstitute for Clinical and Experimental Medicine, Prague, Czech Republic
| | - Václav Burda
- Department of CyberneticsFaculty of Electrical Engineering, Czech Technical University, Prague, Czech Republic
| | - Daniel Novák
- Department of CyberneticsFaculty of Electrical Engineering, Czech Technical University, Prague, Czech Republic
| | - Tomáš Petr
- Institute of Medical Biochemistry and Laboratory DiagnosticsFirst Faculty of Medicine, Charles University in Prague and General University Hospital, Prague, Czech Republic
| | - Libor Vítek
- Institute of Medical Biochemistry and Laboratory DiagnosticsFirst Faculty of Medicine, Charles University in Prague and General University Hospital, Prague, Czech Republic Fourth Department of Internal MedicineFirst Faculty of Medicine, Charles University in Prague and General University Hospital, Prague, Czech Republic
| | - Terezie Pelikánová
- Department of DiabetesInstitute for Clinical and Experimental Medicine, Prague, Czech Republic
| | - Martin Haluzík
- Institute of Medical Biochemistry and Laboratory DiagnosticsFirst Faculty of Medicine, Charles University in Prague and General University Hospital, Prague, Czech Republic Department of ObesitologyInstitute of Endocrinology, Prague, Czech Republic
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Šmíd V, Petr T, Váňová K, Jašprová J, Šuk J, Vítek L, Šmíd F, Muchová L. Changes in Liver Ganglioside Metabolism in Obstructive Cholestasis - the Role of Oxidative Stress. Folia Biol (Praha) 2016; 62:148-159. [PMID: 27643580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Bile acids have been implicated in cholestatic liver damage, primarily due to their detergent effect on membranes and induction of oxidative stress. Gangliosides can counteract these harmful effects by increasing the rigidity of the cytoplasmic membrane. Induction of haem oxygenase (HMOX) has been shown to protect the liver from increased oxidative stress. The aim of this study was to determine the changes in the synthesis and distribution of liver gangliosides following bile duct ligation (BDL), and to assess the effects of HMOX both on cholestatic liver injury and ganglioside metabolism. Compared to controls, BDL resulted in a significant increase in total as well as complex gangliosides and mRNA expression of corresponding glycosyltransferases ST3GalV, ST8SiaI and B3GalTIV. A marked shift of GM1 ganglioside from the intracellular compartment to the cytoplasmic membrane was observed following BDL. Induction of oxidative stress by HMOX inhibition resulted in a further increase of these changes, while HMOX induction prevented this effect. Compared to BDL alone, HMOX inhibition in combination with BDL significantly increased the amount of bile infarcts, while HMOX activation decreased ductular proliferation. We have demonstrated that cholestasis is accompanied by significant changes in the distribution and synthesis of liver gangliosides. HMOX induction results in attenuation of the cholestatic pattern of liver gangliosides, while HMOX inhibition leads to the opposite effect.
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Affiliation(s)
- V Šmíd
- Institute of Medical Biochemistry and Laboratory Diagnostics, First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Czech Republic
| | - T Petr
- Institute of Medical Biochemistry and Laboratory Diagnostics, First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Czech Republic
| | - K Váňová
- Institute of Medical Biochemistry and Laboratory Diagnostics, First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Czech Republic
| | - J Jašprová
- Institute of Medical Biochemistry and Laboratory Diagnostics, First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Czech Republic
| | - J Šuk
- Institute of Medical Biochemistry and Laboratory Diagnostics, First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Czech Republic
| | - L Vítek
- Institute of Medical Biochemistry and Laboratory Diagnostics, First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Czech Republic
| | - F Šmíd
- Institute of Medical Biochemistry and Laboratory Diagnostics, First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Czech Republic
| | - L Muchová
- Institute of Medical Biochemistry and Laboratory Diagnostics, First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Czech Republic
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Broz P, Rajdl D, Racek J, Petr T, Vitek L. Two cases of spuriously elevated cerebrospinal glucose concentration. Ann Clin Biochem 2014; 52:161-4. [PMID: 25074990 DOI: 10.1177/0004563214547284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
We present two cases of spuriously high cerebrospinal fluid glucose concentration with approximately normal blood glucose concentrations. The cause of these abnormal findings was the use of inappropriate collection tubes during the pre-analytical phase. Whilst no patient harm was identified following this error, significant time and effort were expended by both laboratory and clinical staff to explain the cause of these findings.
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Affiliation(s)
- P Broz
- Institute of Clinical Biochemistry and Haematology, University Hospital in Pilsen, Pilsen, Czech Republic Faculty of Medicine in Pilsen, Charles University in Prague, Prague, Czech Republic
| | - D Rajdl
- Institute of Clinical Biochemistry and Haematology, University Hospital in Pilsen, Pilsen, Czech Republic Faculty of Medicine in Pilsen, Charles University in Prague, Prague, Czech Republic
| | - J Racek
- Institute of Clinical Biochemistry and Haematology, University Hospital in Pilsen, Pilsen, Czech Republic Faculty of Medicine in Pilsen, Charles University in Prague, Prague, Czech Republic
| | - T Petr
- Institute of Medical Biochemistry and Laboratory Diagnostics, First Faculty of Medicine, Charles University in Prague, Prague, Czech Republic
| | - L Vitek
- Institute of Medical Biochemistry and Laboratory Diagnostics, First Faculty of Medicine, Charles University in Prague, Prague, Czech Republic Fourth Department of Internal Medicine, First Faculty of Medicine, Charles University in Prague, Prague, Czech Republic
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Petr T, Smíd V, Kučerová V, Váňová K, Leníček M, Vítek L, Smíd F, Muchová L. The effect of heme oxygenase on ganglioside redistribution within hepatocytes in experimental estrogen-induced cholestasis. Physiol Res 2014; 63:359-67. [PMID: 24564601 DOI: 10.33549/physiolres.932665] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Cholestasis is characterized by the elevation of serum total bile acids (TBA), which leads to the production of both free radicals and oxidative stress. Although they do not share the same mechanisms, membrane glycosphingolipids (GSL) and the antioxidant enzyme heme oxygenase-1 (HMOX1) both act against the pro-oxidative effect of TBA. The aim of the study was to assess the role of HMOX on GSL redistribution and composition within hepatocytes in the rat model of estrogen-induced cholestasis. Compared to the controls, an increase of total gangliosides in the liver homogenates of the cholestatic group (P=0.001) was detected; further, it paralleled along with the activation of their biosynthetic b-branch pathway (P<0.01). These effects were partially prevented by HMOX activation. Cholestasis was accompanied by a redistribution of GM1 ganglioside from the cytoplasm to the sinusoids; while HMOX activation led to the retention of GM1 in the cytoplasm (P=0.014). Our study shows that estrogen-induced cholestasis is followed by changes in the synthesis and/or distribution of GSL. These changes are not only triggered by the detergent power of accumulated TBA, but also by their pro-oxidant action. Increases in the antioxidant defenses might represent an important supportive therapeutic measure for patients with cholestatic liver disease.
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Affiliation(s)
- T Petr
- Institute of Medical Biochemistry and Laboratory Diagnostics, First Faculty of Medicine, Charles University in Prague, Prague, Czech Republic.
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Vanova K, Suk J, Petr T, Cerny D, Slanar O, Vreman HJ, Wong RJ, Zima T, Vitek L, Muchova L. Protective effects of inhaled carbon monoxide in endotoxin-induced cholestasis is dependent on its kinetics. Biochimie 2013; 97:173-80. [PMID: 24148277 DOI: 10.1016/j.biochi.2013.10.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2013] [Accepted: 10/11/2013] [Indexed: 10/26/2022]
Abstract
Carbon monoxide (CO), a product of heme oxygenase (HMOX), has many beneficial biological functions and is a promising therapeutic agent for many pathological conditions. However, the kinetics of inhaled CO and its protective role in endotoxin-induced cholestasis is not fully known. Thus, our objective was to characterize the kinetics of inhaled CO and then investigate its use in early phase experimental endotoxin-induced cholestasis. Female Wistar rats were randomly divided into 4 groups: CON (control), LPS (lipopolysaccharide, 6 mg/kg), CO (250 ppm COx1h), and CO + LPS. Rats were sacrificed at 0-12 h after LPS administration. Tissues and blood were collected for liver injury markers and tissue CO distribution measurements. Livers were harvested for measurements of Hmox activity, Hmox1 mRNA expression, cytokines (IL10, IL6, TNF), and bile lipid and pigment transporters. Half-lives of CO in spleen, blood, heart, brain, kidney, liver, and lungs were 2.4 ± 1.5, 2.3 ± 0.8, 1.8 ± 1.6, 1.5 ± 1.2, 1.1 ± 1.1, 0.6 ± 0.3, 0.6 ± 0.2 h, respectively. CO treatment increased liver IL10 mRNA and decreased TNF expression 1 h after LPS treatment and prevented the down-regulation of bile acid and bilirubin hepatic transporters (Slc10a1, Abcb11, and Abcc2, p < 0.05), an effect closely related to the kinetics. The protective effect of CO against cholestatic liver injury persisted even 12 h after CO exposure, as shown by attenuation of serum cholestatic markers in CO-treated animals. CO exposure substantially attenuated endotoxin-induced cholestatic liver injury and was directly related to the kinetics of inhaled CO. This data underscores the importance of the kinetics of inhaled CO for the proper design of experimental and clinical studies of using CO as a treatment strategy.
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Affiliation(s)
- K Vanova
- Institute of Medical Biochemistry and Laboratory Diagnostics, 1st Faculty of Medicine, Charles University in Prague, Prague, Czech Republic
| | - J Suk
- Institute of Medical Biochemistry and Laboratory Diagnostics, 1st Faculty of Medicine, Charles University in Prague, Prague, Czech Republic
| | - T Petr
- Institute of Medical Biochemistry and Laboratory Diagnostics, 1st Faculty of Medicine, Charles University in Prague, Prague, Czech Republic
| | - D Cerny
- Institute of Pharmacology, 1st Faculty of Medicine, Charles University in Prague, Prague, Czech Republic
| | - O Slanar
- Institute of Pharmacology, 1st Faculty of Medicine, Charles University in Prague, Prague, Czech Republic
| | - H J Vreman
- Department of Pediatrics, Stanford University School of Medicine, Stanford, CA, USA
| | - R J Wong
- Department of Pediatrics, Stanford University School of Medicine, Stanford, CA, USA
| | - T Zima
- Institute of Medical Biochemistry and Laboratory Diagnostics, 1st Faculty of Medicine, Charles University in Prague, Prague, Czech Republic
| | - L Vitek
- Institute of Medical Biochemistry and Laboratory Diagnostics, 1st Faculty of Medicine, Charles University in Prague, Prague, Czech Republic; 4th Department of Internal Medicine, 1st Faculty of Medicine, Charles University in Prague, Prague, Czech Republic
| | - L Muchova
- Institute of Medical Biochemistry and Laboratory Diagnostics, 1st Faculty of Medicine, Charles University in Prague, Prague, Czech Republic.
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Haluzíková D, Lacinová Z, Kaválková P, Drápalová J, Křížová J, Bártlová M, Mráz M, Petr T, Vítek L, Kasalický M, Haluzík M. Laparoscopic sleeve gastrectomy differentially affects serum concentrations of FGF-19 and FGF-21 in morbidly obese subjects. Obesity (Silver Spring) 2013; 21:1335-42. [PMID: 23670968 DOI: 10.1002/oby.20208] [Citation(s) in RCA: 96] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/25/2012] [Accepted: 11/16/2012] [Indexed: 12/19/2022]
Abstract
OBJECTIVE Fibroblast growth factor (FGF)-19 and FGF-21 are novel metabolic regulators that improve insulin resistance and obesity in rodents. The aim of the study was to assess the effects of laparoscopic sleeve gastrectomy (LSG) on serum concentrations of FGF-19 and FGF-21 along with circulating bile acids and other relevant hormonal and biochemical parameters. DESIGN AND METHODS Seventeen females with obesity undergoing LSG and 15 lean healthy females were included into the study. Anthropometric and biochemical parameters, serum concentrations of FGF-19 and -21, insulin, adiponectin, leptin, C-reactive protein, resistin, amylin (total), ghrelin (active), glucagon-like peptide 1 (GLP-1, active), glucose-dependent insulinotropic peptide (GIP, total), peptide YY (PYY, total), pancreatic polypeptide (PP), and bile acids, and mRNA expression of selected adipokines and inflammatory markers in bioptic samples of subcutaneous fat were assessed at baseline and 6, 12, and 24 months after LSG. RESULTS LSG markedly decreased body weight, BMI, waist circumference, and insulin levels and improved systemic inflammation and lipid levels. FGF-19 concentrations increased and FGF-21 concentrations decreased after LSG along with increased adiponectin and decreased leptin, amylin, and ghrelin levels. GLP-1, GIP, PP, and circulating bile acids were not affected by LSG. PYY decreased significantly 24 months after surgery only. mRNA expression analysis in subcutaneous fat showed markedly reduced proinflammatory state. CONCLUSIONS Our results indicate that increased FGF-19 and decreased ghrelin concentrations could have partially contributed to the improvement of systemic inflammation and some metabolic parameters after LSG, while changes of FGF-21 are rather secondary because of weight loss.
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Affiliation(s)
- D Haluzíková
- 3rd Department of Medicine, 1st Faculty of Medicine, Charles University and General University Hospital, Prague, Czech Republic.
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Petr T, Smíd V, Smídová J, Hůlková H, Jirkovská M, Elleder M, Muchová L, Vitek L, Smíd F. Histochemical detection of GM1 ganglioside using cholera toxin-B subunit. Evaluation of critical factors optimal for in situ detection with special emphasis to acetone pre-extraction. Eur J Histochem 2010; 54:e23. [PMID: 20558344 PMCID: PMC3167299 DOI: 10.4081/ejh.2010.e23] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2009] [Revised: 03/22/2010] [Accepted: 03/22/2010] [Indexed: 11/25/2022] Open
Abstract
A comparison of histochemical detection of GM1 ganglioside in cryostat sections using cholera toxin B-subunit after fixation with 4% formaldehyde and dry acetone gave tissue-dependent results. In the liver no pre-treatment showed detectable differences related to GM1 reaction products, while studies in the brain showed the superiority of acetone pre-extraction (followed by formaldehyde), which yielded sharper images compared with the diffuse, blurred staining pattern associated with formaldehyde. Therefore, the aim of our study was to define the optimal conditions for the GM1 detection using cholera toxin B-subunit. Ganglioside extractability with acetone, the ever neglected topic, was tested comparing anhydrous acetone with acetone containing admixture of water. TLC analysis of acetone extractable GM1 ganglioside from liver sections did not exceed 2% of the total GM1 ganglioside content using anhydrous acetone at −20°C, and 4% at room temperature. The loss increased to 30.5% using 9:1 acetone/water. Similarly, photometric analysis of lipid sialic acid, extracted from dried liver homogenates with anhydrous acetone, showed the loss of gangliosides into acetone 3.0±0.3% only. The loss from dried brain homogenate was 9.5±1.1%. Thus, anhydrous conditions (dry tissue samples and anhydrous acetone) are crucial factors for optimal in situ ganglioside detection using acetone pre-treatment. This ensures effective physical fixation, especially in tissues rich in polar lipids (precipitation, prevention of in situ diffusion), and removal of cholesterol, which can act as a hydrophobic blocking barrier.
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Affiliation(s)
- T Petr
- Charles University in Prague, 1st Faculty of Medicine, Institute of Clinical Biochemistry and Laboratory Diagnostics, Prague, Czech Republic
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Walker KF, Dunn IG, Edwards D, Petr T, Yang HZ. A fishery in a changing lake environment: The naked carpGymnocypris przewalskii (Kessler) (Cyprinidae: schizothoracinae) in Qinghai Hu, China. ACTA ACUST UNITED AC 1995. [DOI: 10.1007/bf02001491] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Müller L, Kasper P, Müller-Tegethoff K, Petr T. The genotoxic potential in vitro and in vivo of the allyl benzene etheric oils estragole, basil oil and trans-anethole. Mutat Res 1994; 325:129-36. [PMID: 7527904 DOI: 10.1016/0165-7992(94)90075-2] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Estragole, trans-anethole and basil oil were tested for their ability to induce DNA repair in rat hepatocytes in vitro and in rat liver in an ex vivo test. There was a marked induction of UDS by estragole and basil oil in vitro (LOEC about 10(-5) mol/l). The basil oil we used contained about 88.2% estragole. It is evident from our results that the induction of UDS with basil oil could be directly related to its main constituent estragole. trans-Anethole was only slightly effective in the in vitro UDS test. The ex vivo UDS test led to clearly elevated DNA repair for estragole and basil oil in rats treated orally with doses up to 2 g/kg body weight. Estragole was not positive in a chromosomal aberration test with V79 cells either via direct treatment, with rat liver S9 mix or with rat hepatocytes as source of metabolism.
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Affiliation(s)
- L Müller
- Federal Institute for Drugs and Medical Devices, Berlin, Germany
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Bárta I, Adámková M, Petr T, Bártová J. Dose and time dependence of chromosomal aberration yields of bone marrow cells in male Chinese hamsters after a single i.p. injection of aflatoxin B1. Mutat Res 1990; 244:189-95. [PMID: 2114541 DOI: 10.1016/0165-7992(90)90127-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The frequency of chromosomal aberrations in bone marrow cells, after a single i.p. aflatoxin B1 (AFB1) dose, was examined in male Chinese hamsters (Cricetulus griseus). There was a significant increase in aberrant cells within 5 days of administration of a dose of 0.1 micrograms-5 mg AFB1/kg, and on the 36th day. After a single dose of 5 mg AFB1/kg the enhanced frequency of aberrant cells was monitored up to day 104 with no sign of a decrease to control level. The results indicate that the minimum mutagenic effect of an AFB1 dose in this system is 0.1 micrograms/kg. Attention is drawn to the long-term presence of chromosomal aberrations even after a single i.p. exposure to AFB1.
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Affiliation(s)
- I Bárta
- Medical Faculty of Hygiene, Charles University, Prague, Czechoslovakia
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