37 results on '"F, Dodero"'
Search Results
2. Lack of toxicity of hydroethanolic extract from Mitragyna inermis (Willd.) O. Kuntze by gavage in the rat
- Author
-
J.F. Ikoli, F. Delmas, V. Chamlian, A.M. Lorec, G. Balansard, F. Traoré, H. Portugal, S. Monjanel-Mouterde, P. Pisano, F. Dodero, and Monique Gasquet
- Subjects
Male ,Dose ,Pharmacognosy ,Pharmacology ,Mali ,medicine.disease_cause ,Antimalarials ,In vivo ,Oral administration ,Drug Discovery ,medicine ,Animals ,Rats, Wistar ,Intubation, Gastrointestinal ,Medicine, African Traditional ,Chronic toxicity ,Traditional medicine ,Mitragyna ,Plant Extracts ,business.industry ,Acute toxicity ,Rats ,Plant Leaves ,Toxicity ,Female ,business ,Genotoxicity - Abstract
In traditional medicine in Mali, extracts derived from Mitragyna inermis (Willd.) O. Kuntze (Family: Rubiaceae) are commonly used to treat malaria. The antimalarial activity and the lack of genotoxicity in vitro and in vivo have been demonstrated in previous studies. Acute and chronic evaluation of the toxicity of the hydroethanolic extract of Mitragyna inermis leaves was performed in this study, according to the recommendations (cahier de l'Agence no. 3) of the French Drug Office. Two dosages (300 mg/kg and 3 g/kg) were given in one single administration by gavage to male and female rats. No animal died and no behavioral signs of acute toxicity were observed. Chronic toxicity studies over 28 days showed no changes in body weight and no macroscopic abnormality in the 14 organs examined after the animals were sacrificed. With the 3 g/kg/d drug dosage (100-fold higher than those proposed in man), only slight histological abnormalities were observed. Statistically significant differences, compared to control animals, in the weight of some organs and the values of some haematological or biochemical parameters were observed. However, these values always remained in the range given by the breeder for naive animals of the same strain. These investigations thus seemed to indicate the safety of repeated oral administration (up to 3 g/kg/d) of the hydroethanolic extract of Mitragyna inermis leaves, which can therefore be continuously used with safety by the African population in traditional treatment of malaria.
- Published
- 2006
3. A426 Bortezomib or Lenalidomide to Treat Disease Relapse After Allogeneic Transplantation in Myeloma
- Author
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Montefusco, V Falcone, AP Carella, AM Olivieri, A Sanpaolo, G Farina, L Spina, F Dodero, A Morelli, M Milani, R others
- Subjects
Health Sciences ,Επιστήμες Υγείας - Published
- 2009
4. Evaluation of glycogen loss in human liver transplants. Histochemical zonation of glycogen loss in cold ischemia and reperfusion
- Author
-
A, Cherid, N, Cherid, V, Chamlian, J, Hardwigsen, H, Nouhou, F, Dodero, L, Benkoel, Y P, Le Treut, and A, Chamlian
- Subjects
Adult ,Adolescent ,Liver ,Ischemia ,Multivariate Analysis ,Reperfusion ,Humans ,Middle Aged ,Child ,Immunohistochemistry ,Glycogen ,Liver Transplantation - Abstract
To find a prognosis model of human liver transplant, we evaluate 62 surgical biopsies for the loss of glycogen and its variations in relation to cold ischemia, reperfusion, lobular zonation and donor's ages. We applied univariate, multivariate and discriminant analysis and logistic regression. There was a clear lobular zonation of glycogen during cold ischemia and at reperfusion. During cold ischemia, the mean loss was 48% in periportal zones and 74% in pericentrilobular zones. At reperfusion, it was in the range of 60% in periportal zones and 95% in pericentrilobular zones. It was observed in 64% of the grafts for an ischemia time less than 10 hr and in 82% of the grafts for an ischemia time of 10 hr or more. It was increased by 90% at reperfusion with pericentral predominance. Donors' age was an aggravating factor of glycogen loss beyond 28 years of age. In conclusion, in periportal zones, mean global glycogen depletion was about 54% during cold ischemia and reperfusion. It decreased by 90% at reperfusion with pericentral predominance. Logistic regression has allowed modelization of cold ischemia and reperfusion.
- Published
- 2003
5. Hepatitis C virus RNA detection by in situ RT-PCR in formalin-fixed paraffin-embedded liver tissue. Comparison with serum and tissue results
- Author
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P, Biagini, L, Benkoel, F, Dodero, X, de Lamballerie, V, Chamlian, H, Nouhou, V, Gerolami, P, de Micco, and A, Chamlian
- Subjects
Tissue Fixation ,Liver ,Tissue Embedding ,Paraffin ,Reverse Transcriptase Polymerase Chain Reaction ,Formaldehyde ,Virology ,Humans ,RNA, Viral ,Hepacivirus ,Hepatitis C, Chronic - Abstract
The purpose of this study was to localize HCV RNA in formalin-fixed paraffin-embedded liver biopsies of 15 patients with chronic hepatitis C using in situ RT-PCR method. The results were compared to serum and tissue extract analysis of HCV RNA. HCV RNA was detected in 80% of the sera tested, in 40% of the corresponding hepatic tissue extract and in 60% of the tissue sections tested by in situ RT-PCR. Compared to the serum positive cases, 67% of the cases were positive with in situ RT-PCR and 41% were positive with tissue extract detection. 50% of the cases in situ RT-PCR positive were also positive with tissue extract detection. These results underlined the complementarity of the different methods of viral detection for the precise diagnosis of hepatitis C.
- Published
- 2002
6. Effect of ischemia-reperfusion on bile canalicular F-actin microfilaments in hepatocytes of human liver allograft: image analysis by confocal laser scanning microscopy
- Author
-
L, Benkoël, F, Dodero, J, Hardwigsen, P, Campan, D, Botta-Fridlund, D, Lombardo, Y P, Le Treut, and A, Chamlian
- Subjects
Actin Cytoskeleton ,Microscopy, Confocal ,Phalloidine ,Biopsy ,Reperfusion Injury ,Bile Canaliculi ,Cell Membrane ,Hepatocytes ,Humans ,Coloring Agents ,Actins ,Fluorescein-5-isothiocyanate ,Liver Transplantation - Abstract
We studied and quantified the effect of ischemia-reperfusion on hepatic F-actin on bile canalicular and basolateral membranes in human liver allografts by means of confocal laser scanning microscopy imaging. The phalloidin-FITC staining of F-actin was normal in liver hepatocytes before reperfusion but decreased significantly after reperfusion (by 25% of controls). These results indicate that hepatic F-actin alteration is produced during the reperfusion phase. This modification, probably induced by reactive oxygen species, could impair bile canalicular contraction and tight junction permeability and consequently bile secretion in the postoperative period.
- Published
- 2001
7. Effects of digoxin on chemoreflex in patients with chronic heart failure
- Author
-
F, Paganelli, J M, Maixent, R, Gélisse, P, Barnay, F, Dodero, F, Francheschi, S, Lévy, and A, Saadjian
- Subjects
Male ,Oxygen ,Digoxin ,Cardiotonic Agents ,Reflex ,Cardiac Output, Low ,Hemodynamics ,Humans ,Blood Gas Analysis ,Middle Aged ,Chemoreceptor Cells ,Aged - Abstract
The effects of digitalis on the baroreflexes in human chronic heart failure have been well studied. Similarly, since it has been recently shown that chemoregulation remains generally effective during cardiac failure, the goal of this study was to evaluate the effects of a chronic administration of digoxin on the chemoreflexes. Hemodynamic and blood gas parameters were assessed in 7 patients with chronic congestive heart failure before and after chronic administration for 10 days of digoxin therapy (0.25 mg daily). In both situations measurements were performed 1/ in baseline conditions at room air and, 2/ after inhalation of pure O2 for 30 min, in order to inhibit the activation of the chemoreflexes. At room air, acute O2 inhalation resulted in a significant decrease in heart rate and cardiac output. After digoxin therapy, comparatively to pre-treatment values, cardiac output, stroke volume and PaO2 were significantly higher while heart rate, systemic resistance and pulmonary wedge pressure were lower. Furthermore, acute O2 inhalation did not modify heart rate or any hemodynamic variables. These results suggest that after digoxin therapy chemoreflex was no more activated in these patients. This effect may be related to the sympatho-inhibitory and to the positive inotropic effects of digoxin: improving hemodynamic and blood gas parameters may result in the inactivation of the reflex.
- Published
- 2001
8. Central neurocytoma: 2 case reports and review of the literature
- Author
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B Alliez, J Hassoun, F Dodero, P Metellus, H Hassan, and J R Alliez
- Subjects
Adult ,medicine.medical_specialty ,business.industry ,Glasgow Coma Scale ,medicine.disease ,Combined Modality Therapy ,Magnetic Resonance Imaging ,Hydrocephalus ,Benign tumor ,Surgery ,Central nervous system disease ,Sella turcica ,medicine.anatomical_structure ,medicine ,Central neurocytoma ,Humans ,Female ,Neurocytoma ,Neurology (clinical) ,business ,Tomography, X-Ray Computed ,Cerebral Ventricle Neoplasms ,Neuroradiology - Abstract
Central neurocytoma is a rare benign tumor of the central nervous system occuring in young adults and typically located in the ventricles. The tumor is composed of small round cells with neuronal differentiation and has a favourable prognosis. We report two cases of giant central neurocytomas with a triventricular extension in two young women. The first case concerned a 26 years old righthanded woman in whom an intraventricular mass was discovered, after a car accident with head trauma. Skull radiography showed an enlargment of the sella turcica. A CT scan performed in order to examine the pituitary gland revealed a voluminous and heterogenous intraventricular tumor with calcification. The second case concerned a 26 years old righthanded woman, presenting with a 4 Glasgow Coma Scale Score preceded by an acute onset of headache with projectile vomiting. A CT scan performed in emergency revealed a voluminous intraventricular mass with significant hydrocephalus. We review the different pathological and topographical patterns of previously published neurocytomas and discuss surgical management, effectiveness of radiation therapy and biological behavior.
- Published
- 2001
9. Hepatotoxic effect of metallic pollutants on enzyme histochemical activities of yellow-legged gull Larus cachinnans michahellis liver
- Author
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L, Benkoel, F, Dodero, E, Roussel, J C, Baudin, R, Lambert, A, Chamlian, and H, Augier
- Subjects
Histocytochemistry ,Spectrophotometry, Atomic ,Acid Phosphatase ,Mercury ,Birds ,Succinate Dehydrogenase ,Liver ,Metals, Heavy ,Animals ,Environmental Pollutants ,Ca(2+) Mg(2+)-ATPase ,Copper ,Cadmium ,Dihydrolipoamide Dehydrogenase - Abstract
We studied the hepatotoxic effect of heavy metals (cadmium, mercury, copper) on Mg2+ -ATPase, NADH diaphorase, succinic dehydrogenase and acid phosphatase of yellow-legged gull liver, using enzyme histochemical methods. The lysosomal enzyme activity of acid phosphatase was increased in all cases. However, the other enzyme activities appeared to be insensitive to the different metallic pollutants and to their respective levels, in contrast with literature experimental data showing plasma membrane and mitochondrial alterations. This controversy could be explained by the differences in dietary conditions and metal overloads. The molecular basis of the toxicities of metallic pollutants is discussed.
- Published
- 2000
10. Quantitative analysis of glycogen content in hepatocytes of human liver allograft after ischemia and reperfusion
- Author
-
F, Dodero, L, Benkoel, C, Allasia, J, Hardwigsen, P, Campan, D, Botta-Fridlund, Y P, LE Treut, and A, Chamlian
- Subjects
Adult ,Adolescent ,Liver Function Tests ,Histocytochemistry ,Reperfusion Injury ,Hepatocytes ,Humans ,Transplantation, Homologous ,Middle Aged ,Child ,Cells, Cultured ,Glycogen ,Liver Transplantation - Abstract
In order to examine glucose metabolism in liver grafts after cold ischemia and reperfusion, the heterogeneous lobular distribution pattern of glycogen content was studied using histochemical quantitative analysis. In most of the cases, this heterogeneous pattern of glycogen was observed after preservation and reperfusion. However, a 42% reduction of glycogen content, expressed as the ratio between stained surface and total surface of liver biopsies, was observed in biopsies after reperfusion. Moreover, both periportal and centrilobular hepatocytes showed a significant decrease in mean optical density after reperfusion (18% and 25%, respectively). The comparison of our results to early postoperative liver function tests and cold ischemia times showed no significant correlation (p0.05).
- Published
- 2000
11. Effect of ischemia-reperfusion on the heterogeneous lobular distribution pattern of glycogen content and glucose-6-phosphatase activity in human liver allograft
- Author
-
F, Dodero, L, Benkoel, J, Hardwigsen, P, Campan, R, Lambert, D, Botta-Fridlund, Y P, Le Treut, and A, Chamlian
- Subjects
Adult ,Cryopreservation ,Adolescent ,Biopsy ,Middle Aged ,Liver Transplantation ,Liver ,Ischemia ,Reperfusion Injury ,Glucose-6-Phosphatase ,Humans ,Transplantation, Homologous ,Child ,Glycogen - Abstract
In order to examine glucose metabolism in liver grafts after cold ischemia and reperfusion, the heterogeneous lobular distribution pattern of glycogen content and glucose-6-phosphatase activity was studied using histochemical methods. The characteristic heterogeneous lobular distribution pattern of glycogen and glucose-6-phosphatase was maintained after preservation and reperfusion. However, it appeared that glycogen content decreased in both periportal and centrilobular hepatocytes after reperfusion. The glycogen decrease was higher in periportal hepatocytes. Glucose-6-phosphatase activity was maintained after reperfusion in most of the cases in periportal hepatocytes. In centrilobular hepatocytes, more cases showed a decrease in enzyme activity. It is suggested that ischemia-reperfusion mainly affects the glycogen content in both periportal and centrilobular hepatocytes and that centrilobular glucose-6-phosphatase activity is more sensitive to ischemia-reperfusion injury than periportal hepatocytes.
- Published
- 2000
12. Effect of dietary lipids on hepatic Na+,K(+)-ATPase in cyclosporine A-treated rats: immunocytochemical analysis of alpha1 subunit by confocal laser scanning microscopy imaging
- Author
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L, Benkoël, F, Chanussot, F, Dodero, C, de la Maisonneuve, R, Lambert, J, Brisse, and A, Chamlian
- Subjects
Male ,Microscopy, Confocal ,Dietary Fats ,Immunohistochemistry ,Rats ,Bile Acids and Salts ,Isoenzymes ,Liver ,Cyclosporine ,Phosphatidylcholines ,Animals ,Bile ,Rats, Wistar ,Sodium-Potassium-Exchanging ATPase ,Diet, Fat-Restricted ,Immunosuppressive Agents ,Triglycerides - Abstract
We studied the effect of dietary soybean lecithin or triacylglycerol on hepatic Na+,K(+)-ATPase in cyclosporine A-treated rats by means of quantitative immunocytochemistry. Cyclosporine A-treated rats were fed lecithin or a triacylglycerol-enriched diet or a low-fat diet. As a control, one group was only fed the low-fat diet; the three other groups were treated with cyclosporine A solvent and received the low fat, lecithin, or triacylglycerol diet. Bile canalicular staining significantly decreased in all cyclosporine A-treated groups with the higher values in lecithin-fed rats. In basolateral membranes, no decrease was observed in the lecithin-cyclosporine group, in contrast to the other groups. The triacylglycerol-cyclosporine group had lower values in both membrane domains. The alteration of Na+,K(+)-ATPase by cyclosporine A was related to cholestasis evidenced by a decrease in bile salt secretion. These modifications were prevented by dietary soybean lecithin and amplified by dietary soybean triacylglycerol.
- Published
- 1999
13. Analysis by confocal laser scanning microscopy imaging of undilated bile canaliculi F-actin staining in the hepatocytes of human extrahepatic cholestatic liver
- Author
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L, Benköel, F, Dodero, P, Bongrand, A M, Benoliel, R, Lambert, J, Brisse, B, Sastre, A, Cherid, and A, Chamlian
- Subjects
Actin Cytoskeleton ,Analysis of Variance ,Amanitins ,Microscopy, Confocal ,Liver ,Bile Canaliculi ,Humans ,Cholestasis, Extrahepatic ,Actins - Abstract
Many studies have demonstrated the role of bile canalicular microfilaments in bile secretion and bile flow. It is now admitted that modification of bile canalicular network of microfilaments play a role in dysfunction of bile secretion observed in many cases of cholestasis. This work intends to study F-actin, a major component of microfilaments, in human hepatocytes in extrahepatic cholestasis. Normal and extrahepatic cholestatic liver were studied. F-actin was stained with fluorescent phallotoxin and quantified by using confocal laser scanning microscopy and an image analysis method. Mean specific fluorescence (MSF) of bile canaliculi was measured. Since dilated and bile plugged canaliculi were rarely observed in cholestatic liver sections, only undilated bile canaliculi were analysed. Bile canalicular MSF was significantly increased (p0.05) in cholestatic hepatocytes (1.3 to 1.7 fold higher than in controls). These data demonstrate a pericanalicular thickening of F-actin microfilaments in human extrahepatic cholestatis, similar to that described in literature in many cases of human intrahepatic and extrahepatic cholestasis cases as well as in experimentally induced cholestasis. However, further studies are needed to understand this increase in F-actin pericanalicular microfilaments in human extrahepatic cholestasis.
- Published
- 1997
14. Managing the cost of care in the managed care market
- Author
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F, Dodero
- Subjects
Risk Management ,Cost Control ,Managed Care Programs ,Capitation Fee ,Insurance, Liability ,United States - Published
- 1994
15. Le terme di Caracalla
- Author
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CAPALDI, CARMELA, Capaldi C., Caso M., Coraggio F., Dodero E., Gasparri C., Pafumi S., Rausa F., Gasparri C., and Capaldi, Carmela
- Subjects
Collezionismo di antichità. Statuaria classica. Allestimenti museali - Published
- 2009
16. Le sculture in Campo dei Fiori
- Author
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CAPALDI, CARMELA, Capaldi C., Caso M., Coraggio F., Dodero E., Gasparri C., Pafumi S., Rausa F., Gasparri C., and Capaldi, Carmela
- Published
- 2009
17. Gli Orti Farnesiani sul Palatino
- Author
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CAPALDI, CARMELA, Capaldi C., Caso M., Coraggio F., Dodero E., Gasparri C., Pafumi S., Rausa F., and Capaldi, Carmela
- Subjects
Collezionismo di antichità. Statuaria classica. Allestimenti museali - Published
- 2009
18. Lack of toxicity of hydroethanolic extract from Mitragyna inermis (Willd.) O. Kuntze by gavage in the rat.
- Author
-
Monjanel-Mouterde S, Traoré F, Gasquet M, Dodero F, Delmas F, Ikoli JF, Lorec AM, Chamlian V, Portugal H, Balansard G, and Pisano P
- Subjects
- Animals, Antimalarials administration & dosage, Antimalarials toxicity, Female, Intubation, Gastrointestinal, Male, Mali, Plant Extracts administration & dosage, Plant Extracts toxicity, Plant Leaves, Rats, Rats, Wistar, Antimalarials pharmacology, Medicine, African Traditional, Mitragyna, Plant Extracts pharmacology
- Abstract
In traditional medicine in Mali, extracts derived from Mitragyna inermis (Willd.) O. Kuntze (Family: Rubiaceae) are commonly used to treat malaria. The antimalarial activity and the lack of genotoxicity in vitro and in vivo have been demonstrated in previous studies. Acute and chronic evaluation of the toxicity of the hydroethanolic extract of Mitragyna inermis leaves was performed in this study, according to the recommendations (cahier de l'Agence no. 3) of the French Drug Office. Two dosages (300 mg/kg and 3 g/kg) were given in one single administration by gavage to male and female rats. No animal died and no behavioral signs of acute toxicity were observed. Chronic toxicity studies over 28 days showed no changes in body weight and no macroscopic abnormality in the 14 organs examined after the animals were sacrificed. With the 3 g/kg/d drug dosage (100-fold higher than those proposed in man), only slight histological abnormalities were observed. Statistically significant differences, compared to control animals, in the weight of some organs and the values of some haematological or biochemical parameters were observed. However, these values always remained in the range given by the breeder for naive animals of the same strain. These investigations thus seemed to indicate the safety of repeated oral administration (up to 3 g/kg/d) of the hydroethanolic extract of Mitragyna inermis leaves, which can therefore be continuously used with safety by the African population in traditional treatment of malaria.
- Published
- 2006
- Full Text
- View/download PDF
19. [High serum alkaline phosphatase level revealing a liver adenoma].
- Author
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Borentain P, Gérolami R, Dodero F, Chrestian MA, Quillichini F, Ardissone J, Perrimond H, Chamlian A, and Gérolami A
- Subjects
- Adenoma surgery, Adult, Biomarkers, Tumor blood, Female, Humans, Liver Neoplasms surgery, Adenoma blood, Adenoma diagnosis, Alkaline Phosphatase blood, Liver Neoplasms blood, Liver Neoplasms diagnosis
- Abstract
A 25-year-old woman had a high serum level of alkaline phosphatase activity (2571 UI/L). Serum levels of transaminases, gamma glutamyl transferase and bilirubin were normal. Abdominal ultrasonography revealed a tumor nodule in the right liver lobe. There was no evidence of biliary obstruction. The serum activity of alkaline phosphatase returned to normal after surgical removal of the liver tumor. Histologic examination showed that the tumor was a liver adenoma with no evidence of degeneration. The adenoma cells reacted strongly positive to alkaline phosphatase by histochemical staining. The production of hepatic and biliary type alkaline phosphatase by the tumor is the most likely mechanism for the high serum levels observed in this patient.
- Published
- 2006
- Full Text
- View/download PDF
20. Effect of ischemia-reperfusion on Na+, K+-ATPase expression in human liver tissue allograft: image analysis by confocal laser scanning microscopy.
- Author
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Benkoel L, Dodero F, Hardwigsen J, Mas E, Benoliel AM, Botta-Fridlund D, Le Treut YP, Chamlian A, and Lombardo D
- Subjects
- Adult, Analysis of Variance, Biomarkers analysis, Biopsy, Needle, Cadaver, Cohort Studies, Female, Humans, Immunohistochemistry, Ischemia metabolism, Male, Microscopy, Confocal, Middle Aged, Probability, Reference Values, Reperfusion Injury metabolism, Sensitivity and Specificity, Sodium-Potassium-Exchanging ATPase analysis, Tissue Culture Techniques, Tissue Donors, Transplantation, Homologous pathology, Hepatocytes ultrastructure, Ischemia pathology, Liver blood supply, Liver Transplantation pathology, Reperfusion Injury pathology, Sodium-Potassium-Exchanging ATPase metabolism
- Abstract
We have analyzed the effect of ischemia-reperfusion on expression of hepatic Na+,K+-ATPase on bile canalicular (BCM) and basolateral membranes (BLM) in human liver allografts using confocal laser scanning microscopy imaging. Na+, K+-ATPase, an integral membrane enzyme, plays a key role in the physiology and structure of hepatocytes, where it maintains the electrochemical gradients for Na+ and K+ across the cell membrane. The concentrations of these ions as well as their gradients regulate the active transport across the plasma membrane for bile acid and water from sinusoidal to canalicular membranes. In addition, Na+,K+-ATPase is also involved in cellular structure because of its close relationship with submembrane microfilaments and its implication in tight junction assembly. Therefore, Na+,K+-ATPase appears as an indicator of tissue viability and hepatic functionality during liver transplantation. Its localization and its function in BCM are still controversial. As in previous studies, we found an enzyme expression in both BLM and BCM. We show that ischemia induced a decrease in Na+,K+-ATPase expression only in BCM. This result could be explained by the differences in biochemical membrane environment between basolateral and bile canalicular Na+,K+-ATPase. Membrane lipid fluidity, which is more elevated in BLM than in BCM, could protect the enzyme during ischemia. After reperfusion, Na+,K+-ATPase expression was strongly decreased in both BCM and BLM. This alteration following reperfusion is probably due to multiple factors: direct alteration of the enzyme catalytic subunit and modification of its environment and membrane lipid fluidity by free radicals and changes in ATP levels and ionic distribution. This important decrease in Na+,K+-ATPase expression of both BLM and BCM could disturb not only hepatic secretory function but also cellular volume and structure during the postoperative period.
- Published
- 2004
- Full Text
- View/download PDF
21. Immunohistochemical detection of C-100 hepatitis C virus antigen in formaldehyde-fixed paraffin-embedded liver tissue. Correlation with serum, tissue and in situ RT-PCR results.
- Author
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Benkoël L, Biagini P, Dodero F, De Lamballerie X, De Micco P, and Chamlian A
- Subjects
- Humans, Immunohistochemistry methods, Liver chemistry, Liver ultrastructure, Models, Statistical, Paraffin Embedding, Polymerase Chain Reaction methods, RNA, Viral analysis, RNA, Viral blood, Reproducibility of Results, Tissue Fixation, Formaldehyde chemistry, Hepatitis C Antigens analysis, Hepatitis C Antigens genetics, Liver virology, RNA, Viral genetics
- Abstract
We localized HCV C-100 protein in liver biopsies of 15 patients with chronic hepatitis C using immunohistochemistry. The results were compared to serum, tissue extract analysis of HCV RNA and in situ RT-PCR described in a previous study. HCV was detected in 80% of the sera tested, in 40% of the tissue extracts and in 80% and 60% of the tissue sections tested by immunohistochemistry and in situ RT-PCR respectively. Compared to the serum positive cases, 83% and 67% of the cases were respectively positive with immunohistochemistry and in situ RT-PCR and 41% were positive with tissue extract detection. Compared to the tissue extract positive cases, 25% and 50% of the cases were respectively positive with immunohistochemistry and in situ RT-PCR. Finally, 75% of the cases positive by immunohistochemistry were also positive by in situ RT-PCR. These results underline the complementarity of the different methods for the precise diagnosis of hepatitis C.
- Published
- 2004
- Full Text
- View/download PDF
22. Expression of intercellular adhesion molecule-1 (ICAM- 1) during ischemia-reperfusion in human liver tissue allograft: image analysis by confocal laser scanning microscopy.
- Author
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Benkoel L, Dodero F, Hardwigsen J, Benoliel AM, Bongrand P, Botta-Fridlund D, Le Treut YP, Chamlian A, and Lombardo D
- Subjects
- Adult, Cell Membrane metabolism, Endothelium metabolism, Female, Hepatocytes metabolism, Humans, Image Processing, Computer-Assisted, Liver pathology, Male, Microscopy, Confocal, Middle Aged, Reperfusion Injury pathology, Intercellular Adhesion Molecule-1 metabolism, Liver metabolism, Liver Transplantation adverse effects, Reperfusion Injury metabolism
- Abstract
We studied and quantified the effect of ischemia-reperfusion on expression of intercellular adhesion molecule-1 (ICAM-1) on sinusoidal endothelial cells and hepatocyte plasma membranes by means of confocal laser scanning microscopy imaging. We found that ischemia induced an increase in ICAM-1 expression on sinusoidal endothelial cells and hepatocytes. After reperfusion, ICAM-1 expression was increased on sinusoidal endothelial cells, whereas it was unmodified on hepatocytes. On the other hand, ICAM-1 expression was not correlated to ischemia-reperfusion liver injury. Therefore, hepatocellular ischemia-reperfusion injury could be induced by other causes than immune-mediated damages.
- Published
- 2003
- Full Text
- View/download PDF
23. Evaluation of glycogen loss in human liver transplants. Histochemical zonation of glycogen loss in cold ischemia and reperfusion.
- Author
-
Cherid A, Cherid N, Chamlian V, Hardwigsen J, Nouhou H, Dodero F, Benkoel L, Le Treut YP, and Chamlian A
- Subjects
- Adolescent, Adult, Child, Humans, Immunohistochemistry, Ischemia metabolism, Liver blood supply, Middle Aged, Multivariate Analysis, Reperfusion, Glycogen metabolism, Liver metabolism, Liver Transplantation
- Abstract
To find a prognosis model of human liver transplant, we evaluate 62 surgical biopsies for the loss of glycogen and its variations in relation to cold ischemia, reperfusion, lobular zonation and donor's ages. We applied univariate, multivariate and discriminant analysis and logistic regression. There was a clear lobular zonation of glycogen during cold ischemia and at reperfusion. During cold ischemia, the mean loss was 48% in periportal zones and 74% in pericentrilobular zones. At reperfusion, it was in the range of 60% in periportal zones and 95% in pericentrilobular zones. It was observed in 64% of the grafts for an ischemia time less than 10 hr and in 82% of the grafts for an ischemia time of 10 hr or more. It was increased by 90% at reperfusion with pericentral predominance. Donors' age was an aggravating factor of glycogen loss beyond 28 years of age. In conclusion, in periportal zones, mean global glycogen depletion was about 54% during cold ischemia and reperfusion. It decreased by 90% at reperfusion with pericentral predominance. Logistic regression has allowed modelization of cold ischemia and reperfusion.
- Published
- 2003
24. Effect of ischemia-reperfusion on bile canalicular F-actin microfilaments in hepatocytes of human liver allograft: image analysis by confocal laser scanning microscopy.
- Author
-
Benkoël L, Dodero F, Hardwigsen J, Campan P, Botta-Fridlund D, Lombardo D, Le Treut YP, and Chamlian A
- Subjects
- Biopsy, Cell Membrane ultrastructure, Coloring Agents, Fluorescein-5-isothiocyanate, Humans, Microscopy, Confocal, Phalloidine, Actin Cytoskeleton ultrastructure, Actins ultrastructure, Bile Canaliculi ultrastructure, Hepatocytes ultrastructure, Liver Transplantation pathology, Reperfusion Injury pathology
- Abstract
We studied and quantified the effect of ischemia-reperfusion on hepatic F-actin on bile canalicular and basolateral membranes in human liver allografts by means of confocal laser scanning microscopy imaging. The phalloidin-FITC staining of F-actin was normal in liver hepatocytes before reperfusion but decreased significantly after reperfusion (by 25% of controls). These results indicate that hepatic F-actin alteration is produced during the reperfusion phase. This modification, probably induced by reactive oxygen species, could impair bile canalicular contraction and tight junction permeability and consequently bile secretion in the postoperative period.
- Published
- 2001
- Full Text
- View/download PDF
25. Bronchial brush: an unusual cause of bronchiectasis.
- Author
-
Débat-Zoguéreh D, Badiaga S, Thomas P, Dodero F, and Brouqui P
- Subjects
- Adult, Anti-Bacterial Agents therapeutic use, Bronchiectasis diagnostic imaging, Bronchiectasis therapy, Combined Modality Therapy, Foreign Bodies diagnostic imaging, Foreign Bodies therapy, Humans, Male, Pneumonectomy, Tomography, X-Ray Computed, Bronchiectasis etiology, Bronchoalveolar Lavage adverse effects, Bronchoalveolar Lavage instrumentation, Foreign Bodies etiology
- Published
- 2001
26. Effects of digoxin on chemoreflex in patients with chronic heart failure.
- Author
-
Paganelli F, Maixent JM, Gélisse R, Barnay P, Dodero F, Francheschi F, Lévy S, and Saadjian A
- Subjects
- Aged, Blood Gas Analysis, Cardiac Output, Low blood, Cardiac Output, Low physiopathology, Cardiotonic Agents pharmacology, Cardiotonic Agents therapeutic use, Digoxin pharmacology, Hemodynamics drug effects, Humans, Male, Middle Aged, Oxygen administration & dosage, Oxygen metabolism, Cardiac Output, Low drug therapy, Chemoreceptor Cells metabolism, Digoxin therapeutic use, Reflex physiology
- Abstract
The effects of digitalis on the baroreflexes in human chronic heart failure have been well studied. Similarly, since it has been recently shown that chemoregulation remains generally effective during cardiac failure, the goal of this study was to evaluate the effects of a chronic administration of digoxin on the chemoreflexes. Hemodynamic and blood gas parameters were assessed in 7 patients with chronic congestive heart failure before and after chronic administration for 10 days of digoxin therapy (0.25 mg daily). In both situations measurements were performed 1/ in baseline conditions at room air and, 2/ after inhalation of pure O2 for 30 min, in order to inhibit the activation of the chemoreflexes. At room air, acute O2 inhalation resulted in a significant decrease in heart rate and cardiac output. After digoxin therapy, comparatively to pre-treatment values, cardiac output, stroke volume and PaO2 were significantly higher while heart rate, systemic resistance and pulmonary wedge pressure were lower. Furthermore, acute O2 inhalation did not modify heart rate or any hemodynamic variables. These results suggest that after digoxin therapy chemoreflex was no more activated in these patients. This effect may be related to the sympatho-inhibitory and to the positive inotropic effects of digoxin: improving hemodynamic and blood gas parameters may result in the inactivation of the reflex.
- Published
- 2001
27. Hepatitis C virus RNA detection by in situ RT-PCR in formalin-fixed paraffin-embedded liver tissue. Comparison with serum and tissue results.
- Author
-
Biagini P, Benkoel L, Dodero F, de Lamballerie X, Chamlian V, Nouhou H, Gerolami V, de Micco P, and Chamlian A
- Subjects
- Formaldehyde, Hepatitis C, Chronic diagnosis, Humans, Liver virology, Paraffin, RNA, Viral blood, Reverse Transcriptase Polymerase Chain Reaction, Tissue Embedding, Tissue Fixation, Virology methods, Hepacivirus genetics, Hepacivirus isolation & purification, Hepatitis C, Chronic virology, RNA, Viral genetics, RNA, Viral isolation & purification
- Abstract
The purpose of this study was to localize HCV RNA in formalin-fixed paraffin-embedded liver biopsies of 15 patients with chronic hepatitis C using in situ RT-PCR method. The results were compared to serum and tissue extract analysis of HCV RNA. HCV RNA was detected in 80% of the sera tested, in 40% of the corresponding hepatic tissue extract and in 60% of the tissue sections tested by in situ RT-PCR. Compared to the serum positive cases, 67% of the cases were positive with in situ RT-PCR and 41% were positive with tissue extract detection. 50% of the cases in situ RT-PCR positive were also positive with tissue extract detection. These results underlined the complementarity of the different methods of viral detection for the precise diagnosis of hepatitis C.
- Published
- 2001
28. Hepatotoxic effect of metallic pollutants on enzyme histochemical activities of yellow-legged gull Larus cachinnans michahellis liver.
- Author
-
Benkoel L, Dodero F, Roussel E, Baudin JC, Lambert R, Chamlian A, and Augier H
- Subjects
- Acid Phosphatase metabolism, Animals, Ca(2+) Mg(2+)-ATPase metabolism, Cadmium analysis, Cadmium toxicity, Copper analysis, Copper toxicity, Dihydrolipoamide Dehydrogenase metabolism, Environmental Pollutants analysis, Histocytochemistry, Liver chemistry, Liver pathology, Mercury analysis, Mercury toxicity, Metals, Heavy analysis, Spectrophotometry, Atomic, Succinate Dehydrogenase metabolism, Birds, Environmental Pollutants toxicity, Liver drug effects, Liver enzymology, Metals, Heavy toxicity
- Abstract
We studied the hepatotoxic effect of heavy metals (cadmium, mercury, copper) on Mg2+ -ATPase, NADH diaphorase, succinic dehydrogenase and acid phosphatase of yellow-legged gull liver, using enzyme histochemical methods. The lysosomal enzyme activity of acid phosphatase was increased in all cases. However, the other enzyme activities appeared to be insensitive to the different metallic pollutants and to their respective levels, in contrast with literature experimental data showing plasma membrane and mitochondrial alterations. This controversy could be explained by the differences in dietary conditions and metal overloads. The molecular basis of the toxicities of metallic pollutants is discussed.
- Published
- 2000
29. Quantitative analysis of glycogen content in hepatocytes of human liver allograft after ischemia and reperfusion.
- Author
-
Dodero F, Benkoel L, Allasia C, Hardwigsen J, Campan P, Botta-Fridlund D, LE Treut YP, and Chamlian A
- Subjects
- Adolescent, Adult, Cells, Cultured, Child, Glycogen analysis, Hepatocytes chemistry, Histocytochemistry, Humans, Liver Function Tests, Middle Aged, Reperfusion Injury physiopathology, Transplantation, Homologous, Glycogen metabolism, Hepatocytes metabolism, Hepatocytes transplantation, Liver Transplantation, Reperfusion Injury metabolism
- Abstract
In order to examine glucose metabolism in liver grafts after cold ischemia and reperfusion, the heterogeneous lobular distribution pattern of glycogen content was studied using histochemical quantitative analysis. In most of the cases, this heterogeneous pattern of glycogen was observed after preservation and reperfusion. However, a 42% reduction of glycogen content, expressed as the ratio between stained surface and total surface of liver biopsies, was observed in biopsies after reperfusion. Moreover, both periportal and centrilobular hepatocytes showed a significant decrease in mean optical density after reperfusion (18% and 25%, respectively). The comparison of our results to early postoperative liver function tests and cold ischemia times showed no significant correlation (p<0.05).
- Published
- 2000
30. Effect of dietary lipid (soybean lecithin and triacylglycerol) on hepatic F-actin microfilaments in cyclosporine A-treated rats: image analysis by confocal laser scanning microscopy.
- Author
-
Benkoel L, Chanussot F, Dodero F, De la Maisonneuve C, Bongrand P, Benoliel AM, Lambert R, Brisse J, and Chamlian A
- Subjects
- Actins metabolism, Amanitins, Animals, Bile metabolism, Liver drug effects, Liver pathology, Male, Microscopy, Confocal, Rats, Rats, Wistar, Actins physiology, Cyclosporine pharmacology, Dietary Fats pharmacology, Liver physiopathology, Phosphatidylcholines pharmacology, Glycine max, Triglycerides pharmacology
- Abstract
We studied and quantified the effect of cyclosporine A on hepatic F-actin on bile canalicular and basolateral membranes in rats fed either soybean lecithin, triacylglycerol-enriched diet, or low-fat diet by means of confocal laser scanning microscopy imaging. The phalloidin-FITC staining of F-actin was quite normal in the lecithin-cyclosporine A group but decreased significantly in the other cyclosporine A-treated groups (by 40% and 25% of control in triacylglycerol-cyclosporine A and cyclosporine A groups, respectively). The alteration of F-actin by cyclosporine A, related to cholestasis evidenced by a decrease in bile salt secretion, was prevented by dietary soybean lecithin and amplified by dietary soybean triacylglycerol.
- Published
- 2000
- Full Text
- View/download PDF
31. Central neurocytoma: 2 case reports and review of the literature.
- Author
-
Dodero F, Alliez JR, Metellus P, Hassan H, Hassoun J, and Alliez B
- Subjects
- Adult, Cerebral Ventricle Neoplasms pathology, Cerebral Ventricle Neoplasms radiotherapy, Cerebral Ventricle Neoplasms surgery, Combined Modality Therapy, Female, Humans, Magnetic Resonance Imaging, Neurocytoma pathology, Neurocytoma radiotherapy, Neurocytoma surgery, Tomography, X-Ray Computed, Cerebral Ventricle Neoplasms diagnosis, Neurocytoma diagnosis
- Abstract
Central neurocytoma is a rare benign tumor of the central nervous system occuring in young adults and typically located in the ventricles. The tumor is composed of small round cells with neuronal differentiation and has a favourable prognosis. We report two cases of giant central neurocytomas with a triventricular extension in two young women. The first case concerned a 26 years old righthanded woman in whom an intraventricular mass was discovered, after a car accident with head trauma. Skull radiography showed an enlargment of the sella turcica. A CT scan performed in order to examine the pituitary gland revealed a voluminous and heterogenous intraventricular tumor with calcification. The second case concerned a 26 years old righthanded woman, presenting with a 4 Glasgow Coma Scale Score preceded by an acute onset of headache with projectile vomiting. A CT scan performed in emergency revealed a voluminous intraventricular mass with significant hydrocephalus. We review the different pathological and topographical patterns of previously published neurocytomas and discuss surgical management, effectiveness of radiation therapy and biological behavior.
- Published
- 2000
- Full Text
- View/download PDF
32. Effect of ischemia-reperfusion on the heterogeneous lobular distribution pattern of glycogen content and glucose-6-phosphatase activity in human liver allograft.
- Author
-
Dodero F, Benkoel L, Hardwigsen J, Campan P, Lambert R, Botta-Fridlund D, Le Treut YP, and Chamlian A
- Subjects
- Adolescent, Adult, Biopsy, Child, Cryopreservation, Humans, Middle Aged, Transplantation, Homologous, Glucose-6-Phosphatase metabolism, Glycogen metabolism, Ischemia metabolism, Liver metabolism, Liver Transplantation physiology, Reperfusion Injury metabolism
- Abstract
In order to examine glucose metabolism in liver grafts after cold ischemia and reperfusion, the heterogeneous lobular distribution pattern of glycogen content and glucose-6-phosphatase activity was studied using histochemical methods. The characteristic heterogeneous lobular distribution pattern of glycogen and glucose-6-phosphatase was maintained after preservation and reperfusion. However, it appeared that glycogen content decreased in both periportal and centrilobular hepatocytes after reperfusion. The glycogen decrease was higher in periportal hepatocytes. Glucose-6-phosphatase activity was maintained after reperfusion in most of the cases in periportal hepatocytes. In centrilobular hepatocytes, more cases showed a decrease in enzyme activity. It is suggested that ischemia-reperfusion mainly affects the glycogen content in both periportal and centrilobular hepatocytes and that centrilobular glucose-6-phosphatase activity is more sensitive to ischemia-reperfusion injury than periportal hepatocytes.
- Published
- 1999
33. Effect of dietary lipids on hepatic Na+,K(+)-ATPase in cyclosporine A-treated rats: immunocytochemical analysis of alpha1 subunit by confocal laser scanning microscopy imaging.
- Author
-
Benkoël L, Chanussot F, Dodero F, de la Maisonneuve C, Lambert R, Brisse J, and Chamlian A
- Subjects
- Animals, Bile metabolism, Bile Acids and Salts metabolism, Diet, Fat-Restricted, Immunohistochemistry, Isoenzymes metabolism, Liver metabolism, Male, Microscopy, Confocal, Phosphatidylcholines pharmacology, Rats, Rats, Wistar, Triglycerides pharmacology, Cyclosporine pharmacology, Dietary Fats pharmacology, Immunosuppressive Agents pharmacology, Liver drug effects, Liver enzymology, Sodium-Potassium-Exchanging ATPase metabolism
- Abstract
We studied the effect of dietary soybean lecithin or triacylglycerol on hepatic Na+,K(+)-ATPase in cyclosporine A-treated rats by means of quantitative immunocytochemistry. Cyclosporine A-treated rats were fed lecithin or a triacylglycerol-enriched diet or a low-fat diet. As a control, one group was only fed the low-fat diet; the three other groups were treated with cyclosporine A solvent and received the low fat, lecithin, or triacylglycerol diet. Bile canalicular staining significantly decreased in all cyclosporine A-treated groups with the higher values in lecithin-fed rats. In basolateral membranes, no decrease was observed in the lecithin-cyclosporine group, in contrast to the other groups. The triacylglycerol-cyclosporine group had lower values in both membrane domains. The alteration of Na+,K(+)-ATPase by cyclosporine A was related to cholestasis evidenced by a decrease in bile salt secretion. These modifications were prevented by dietary soybean lecithin and amplified by dietary soybean triacylglycerol.
- Published
- 1999
- Full Text
- View/download PDF
34. A quantitative immunocytochemical study of Na+,K+-ATPase in rat hepatocytes after STZ-induced diabetes and dietary fish oil supplementation.
- Author
-
Sennoune S, Gerbi A, Duran MJ, Benkoël L, Pierre S, Lambert R, Dodero F, Chamlian A, Vague P, and Maixent JM
- Subjects
- Animals, Cell Membrane chemistry, Cell Membrane enzymology, Cell Membrane physiology, Diabetes Mellitus, Experimental diet therapy, Fatty Acids analysis, Image Processing, Computer-Assisted, Immunohistochemistry, Male, Rats, Rats, Sprague-Dawley, Diabetes Mellitus, Experimental enzymology, Fish Oils therapeutic use, Liver enzymology, Sodium-Potassium-Exchanging ATPase metabolism
- Abstract
Because diabetes causes alterations in hepatic membrane fatty acid content, these changes may affect the Na+,K+-ATPase. In this study we documented the effects of streptozotocin (STZ)-induced diabetes on hepatic Na+,K+-ATPase catalytic alpha1-subunit and evaluated whether these changes could be normalized by fish oil supplementation. Two groups of diabetic rats received fish oil or olive oil supplementation. Both groups had a respective control group. We studied the localization of catalytic alpha1-subunit on bile canalicular and basolateral membranes using immunocytochemical methods and confocal laser scanning microscopy, and the Na+, K+-ATPase activity, membrane fluidity, and fatty acid composition on isolated hepatic membranes. A decrease in the alpha1-subunit was observed with diabetes in the bile canalicular membranes, without changes in basolateral membranes. This decrease was partially prevented by dietary fish oil. Diabetes induces significant changes as documented by enzymatic Na+,K+-ATPase activity, membrane fluidity, and fatty acid content, whereas little change in these parameters was observed after a fish oil diet. In conclusion, STZ-induced diabetes appears to modify bile canalicular membrane integrity and dietary fish oil partly prevents the diabetes-induced alterations.
- Published
- 1999
- Full Text
- View/download PDF
35. Modification of Ca2+, Mg2+-ATPase and F-actin distribution in hepatocytes of cyclosporine A treated rats. Effect of soyabean lecithin and triacylglycerol.
- Author
-
Benkoel L, Chanussot F, Dodero F, De La Maisonneuve C, Lambert R, Brisse J, Delmas M, and Chamlian A
- Subjects
- Animals, Bile Acids and Salts metabolism, Bile Canaliculi ultrastructure, Dietary Fats pharmacology, Liver metabolism, Male, Rats, Rats, Wistar, Glycine max, Actins metabolism, Bile Canaliculi drug effects, Bile Canaliculi metabolism, Ca(2+) Mg(2+)-ATPase metabolism, Cyclosporine pharmacology, Phosphatidylcholines pharmacology, Triglycerides pharmacology
- Abstract
We studied the effect of cyclosporine A on hepatic Ca2+, Mg2+-ATPase and F-actin on bile canalicular and basolateral membranes in rats fed either soyabean lecithin, or triacylglycerol enriched diet, or low fat diet. Ca2+, Mg2+-ATPase histochemical activity was not modified in lecithin-cyclosporine A group, whereas the activity was decreased in the other groups. The triacylglycerol-cyclosporine A group had the lower activity. The histochemical staining of F-actin was quite normal in lecithin-cyclosporine group but decreased in the other cyclosporine A treated groups. The lower staining was observed in the triacylglycerol-cyclosporine group. The alteration of Ca2+, Mg2+-ATPase and F-actin by cyclosporine A, related to cholestasis evidenced by a decrease in bile salt secretion, were prevented by dietary soyabean lecithin and amplified by dietary soyabean triacylglycerol.
- Published
- 1998
36. Analysis by confocal laser scanning microscopy imaging of undilated bile canaliculi F-actin staining in the hepatocytes of human extrahepatic cholestatic liver.
- Author
-
Benköel L, Dodero F, Bongrand P, Benoliel AM, Lambert R, Brisse J, Sastre B, Cherid A, and Chamlian A
- Subjects
- Actin Cytoskeleton metabolism, Amanitins, Analysis of Variance, Bile Canaliculi pathology, Cholestasis, Extrahepatic pathology, Humans, Liver metabolism, Liver pathology, Microscopy, Confocal, Actins metabolism, Bile Canaliculi metabolism, Cholestasis, Extrahepatic metabolism
- Abstract
Many studies have demonstrated the role of bile canalicular microfilaments in bile secretion and bile flow. It is now admitted that modification of bile canalicular network of microfilaments play a role in dysfunction of bile secretion observed in many cases of cholestasis. This work intends to study F-actin, a major component of microfilaments, in human hepatocytes in extrahepatic cholestasis. Normal and extrahepatic cholestatic liver were studied. F-actin was stained with fluorescent phallotoxin and quantified by using confocal laser scanning microscopy and an image analysis method. Mean specific fluorescence (MSF) of bile canaliculi was measured. Since dilated and bile plugged canaliculi were rarely observed in cholestatic liver sections, only undilated bile canaliculi were analysed. Bile canalicular MSF was significantly increased (p < 0.05) in cholestatic hepatocytes (1.3 to 1.7 fold higher than in controls). These data demonstrate a pericanalicular thickening of F-actin microfilaments in human extrahepatic cholestatis, similar to that described in literature in many cases of human intrahepatic and extrahepatic cholestasis cases as well as in experimentally induced cholestasis. However, further studies are needed to understand this increase in F-actin pericanalicular microfilaments in human extrahepatic cholestasis.
- Published
- 1997
37. Managing the cost of care in the managed care market.
- Author
-
Dodero F
- Subjects
- Capitation Fee, Cost Control, Risk Management methods, United States, Insurance, Liability, Managed Care Programs economics, Risk Management economics
- Published
- 1994
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