RESUMEN
Recurrent common bile duct stones (CBDS) can occur after endoscopic biliary sphincterotomy (EST). Bile flow through the papilla of Vater could be improved by means of abdominal massage. We report the results of self-abdominal massage in four patients who had previously undergone cholecystectomy and experienced multiple CBDS recurrences after EST.
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Cálculos Biliares , Esfinterotomía Endoscópica , Colangiopancreatografia Retrógrada Endoscópica/efectos adversos , Conducto Colédoco , Cálculos Biliares/cirugía , Humanos , Masaje , Recurrencia , Esfinterotomía Endoscópica/efectos adversosRESUMEN
In all endoscopic ultrasound (EUS) examinations performed at our hospital, the heart, vasculature, and mediastinal lymph nodes from the esophagus are observed after checking for gastrointestinal pathologies. Since the introduction of EUS using a convex linear-array echoendoscope at our hospital in April 2015, EUS examinations have been performed in 371 cases for examining pancreaticobiliary diseases, submucosal tumors, and other pathologies during the 3-year period, till March 2018. We diagnosed 2 patients with asymptomatic cardiovascular disease while observing the mediastinum during EUS examination to examine identified pancreaticobiliary disease. No subjective symptoms associated with cardiovascular disease were observed and the respective conditions had not been identified previously in either case. One case involved a left atrial myxoma while the other involved a saccular aortic aneurysm in the thoracic aorta. A left atrial tumor resection and aortic replacement surgery were performed in each case. Their postoperative courses have been favorable. As cardiovascular diseases are often life-threatening, as in the present 2 cases, observational screening of the cardiovascular system from the esophagus should also be performed during EUS examinations just as the pharyngeal region is examined during upper gastrointestinal endoscopy.
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Aneurisma de la Aorta/diagnóstico por imagen , Endosonografía , Atrios Cardíacos/diagnóstico por imagen , Neoplasias Cardíacas/diagnóstico por imagen , Mediastino/diagnóstico por imagen , Mixoma/diagnóstico por imagen , Anciano , Aneurisma de la Aorta/cirugía , Femenino , Enfermedades de la Vesícula Biliar/diagnóstico por imagen , Atrios Cardíacos/cirugía , Neoplasias Cardíacas/cirugía , Humanos , Masculino , Mixoma/cirugía , Enfermedades Pancreáticas/diagnóstico por imagenRESUMEN
Background: Endoscopic transpapillary gallbladder stenting (ETGBS) is an effective procedure for treating high-risk patients with acute cholecystitis and severe comorbidities. However, the efficacy of ETGBS for recurrent cholecystitis (RC) remains unclear. This study aimed to explore its efficacy in patients with RC for whom cholecystectomy is contraindicated because of its high surgical risk. Methods: Data on 19 high-risk patients who had undergone ETGBS for RC after initial conservative therapy in our institution between June 2006 and May 2012 were retrospectively examined. The primary outcome was the clinical success rate, which was defined as no recurrences of acute cholecystitis after ETGBS until death or the end of the follow-up period. Secondary outcomes were technical success rate and adverse events (AEs). Results: The clinical success rate of ETGBS was 100%, the technical success rate 94.7%, and AE rate 5%: one patient developed procedure-related mild acute pancreatitis. The clinical courses of all patients were as follows: four died of nonbiliary disease, and the remaining 15 were subsequently treated conservatively. The median duration of follow-up was 14.95 months (range 3-42 months). Conclusions: ETGBS is an effective alternative for managing RC in high-risk patients with severe comorbidities.
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Colangiopancreatografia Retrógrada Endoscópica/métodos , Colecistitis Aguda/terapia , Stents , Anciano , Anciano de 80 o más Años , Ampolla Hepatopancreática , Colangiopancreatografia Retrógrada Endoscópica/efectos adversos , Tratamiento Conservador , Femenino , Vesícula Biliar , Humanos , Masculino , Persona de Mediana Edad , Recurrencia , Retratamiento , Estudios Retrospectivos , Stents/efectos adversos , Factores de TiempoRESUMEN
BACKGROUND AND STUDY AIMS: Endoscopic sphincterotomy (EST) is effective, but recurrent bile duct stones are a common late complication. Because there are still no effective therapies for preventing this complication, some patients have experienced bile duct stone recurrence many times. We describe herein a method of abdominal massage to treat patients with prior cholecystectomy who have experienced recurrence of bile duct stones.
RESUMEN
BACKGROUND: The ability to obtain tissue samples for histological examination during EUS has theoretical advantages over cytology alone. OBJECTIVE: To prospectively evaluate the feasibility and yield of EUS-guided fine-needle tissue acquisition (EUS-FNTA) with a large-gauge needle in patients in whom we expected histology to be more useful than cytology to reach a definitive diagnosis. DESIGN: Prospective cohort study. SETTING: Tertiary care academic medical center. PATIENTS: Consecutive patients with subepithelial lesions, esophagogastric wall thickening, mediastinal and abdominal masses/lymphadenopathy of unknown origin, or pancreatic lesions after nondiagnostic FNA. INTERVENTIONS: EUS-FNTA with a 19-gauge needle. MAIN OUTCOME MEASUREMENTS: Feasibility and yield of EUS-FNTA. RESULTS: A total of 120 patients with a mean age of 61 ± 14.6 years and mean lesion size of 38 ± 25 mm (range 8-140 mm) were enrolled. FNTA was successfully performed in all but 1 patient (98.9%), and adequate samples for histological examination were obtained in 116 of the 119 patients (97.5%) in whom EUS-FNTA was technically successful. A mean of 2.8 ± 0.8 passes per patient were performed. At the time of current follow-up, a definitive diagnosis was available in 117 of the 120 patients (97.5%), with only 8 false-negative results. The sensitivity, specificity, positive and negative predictive values, and diagnostic accuracy of EUS-FNTA in the 117 patients with a definitive diagnosis were 91.8%, 100%, 100%, 71.4%, and 93.2%, respectively. LIMITATIONS: Single-center study with limited power. CONCLUSIONS: EUS-FNTA by using a large-gauge needle has a high yield and promising diagnostic accuracy and could be used when histology may be more useful than cytology to reach a definitive diagnosis.
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Adenocarcinoma/patología , Biopsia con Aguja Fina/instrumentación , Carcinoma de Células Escamosas/patología , Neoplasias del Sistema Digestivo/patología , Linfoma/patología , Agujas , Anciano , Reacciones Falso Negativas , Reacciones Falso Positivas , Femenino , Humanos , Ganglios Linfáticos/patología , Masculino , Enfermedades del Mediastino/patología , Persona de Mediana Edad , Pancreatitis/patología , Valor Predictivo de las Pruebas , Estudios Prospectivos , Ultrasonografía IntervencionalAsunto(s)
Adenocarcinoma/patología , Biopsia con Aguja Fina/instrumentación , Neoplasias del Ciego/patología , Neoplasias del Ciego/cirugía , Endoscopios Gastrointestinales , Endosonografía/instrumentación , Enfermedad de Hodgkin/diagnóstico , Enfermedad de Hodgkin/patología , Enfermedad de Hodgkin/cirugía , Recurrencia Local de Neoplasia/patología , Recurrencia Local de Neoplasia/cirugía , Neoplasias Primarias Múltiples/patología , Neoplasias Primarias Múltiples/cirugía , Neoplasias del Recto/patología , Neoplasias del Recto/cirugía , Adenocarcinoma/diagnóstico , Adenocarcinoma/cirugía , Adulto , Anciano , Neoplasias del Ciego/diagnóstico , Enfermedades del Colon/diagnóstico , Enfermedades del Colon/patología , Enfermedades del Colon/cirugía , Colostomía , Diagnóstico Diferencial , Endometriosis/diagnóstico , Endometriosis/patología , Endometriosis/cirugía , Femenino , Humanos , Ganglios Linfáticos/patología , Metástasis Linfática/patología , Neoplasias del Mediastino/diagnóstico , Neoplasias del Mediastino/patología , Neoplasias del Mediastino/cirugía , Recurrencia Local de Neoplasia/diagnóstico , Neoplasias Primarias Múltiples/diagnóstico , Neoplasias del Recto/diagnóstico , Tomografía Computarizada por Rayos XRESUMEN
Our study used protein array technology to analyze the expression status of various activated receptor tyrosine kinases (RTKs) in gastric carcinoma; then, we sought to discover an effective therapeutic receptor tyrosine kinase for this disease and investigated the anti-tumor mechanism of the therapeutic RTK. In addition to the expressions of activated RTKs in human gastric cancer and adjacent normal mucosa, the expression of activated RTKs in gastric cancer cell lines, MKN74, MKN45, MKN7 and MKN1, were also studied. The RTKs activated in gastric cancer tissue are EGFR, ErbB2, FGFR1, FGFR2alpha insulin R, and EphA4. Among the RTKs activated in gastric cancer tissues, EGFR and ErbB2 were also activated in all gastric cell lines examined in this study. A subsequent in vitro experiment using subcutaneous gastric cancer-bearing athymic nude mice demonstrated that the ErbB2-targeting drug trastuzumab markedly suppressed the growth of gastric cancer. Moreover, using an angiogenesis protein array, the expressions of Ang I, FGF-alpha, FGF-beta TGF-beta and IL-8 in MKN74 xenograft tumors were found to be significantly reduced by treatment with trastuzumab, indicating that trastuzumab may inhibit the expression of angiogenic molecules in MKN74 cells in vivo. These data suggest that ErbB2 is activated in gastric cancer, and the ErbB2-targeting drug trastuzumab may be related to the reduction of Ang 1, FGFalpha, FGFbeta, TGFalpha and IL-8.
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Carcinoma/metabolismo , Regulación Neoplásica de la Expresión Génica , Neovascularización Patológica , Análisis por Matrices de Proteínas/métodos , Proteínas Tirosina Quinasas Receptoras/metabolismo , Neoplasias Gástricas/metabolismo , Anciano , Animales , Línea Celular Tumoral , Femenino , Humanos , Masculino , Ratones , Ratones Desnudos , Persona de Mediana Edad , Trasplante de NeoplasiasRESUMEN
We report the first autopsied case of paraneoplastic necrotizing myelopathy associated with esophageal cancer in the literature. The patient had acute flaccid paraplegia and urinary retention, and had a good recovery of strength of both legs in response to corticosteroids. MRI showed a characteristic lesion with post-gadolinium enhancement of the cervical to mid-thoracic spinal cord at the onset, which has never been reported. Taken together, these results suggest that there is an underlying autoimmune mechanism in paraneoplastic necrotizing myelopathy.
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Carcinoma de Células Escamosas/complicaciones , Neoplasias Esofágicas/complicaciones , Síndromes Paraneoplásicos del Sistema Nervioso/complicaciones , Enfermedades de la Médula Espinal/complicaciones , Anciano , Carcinoma de Células Escamosas/diagnóstico , Carcinoma de Células Escamosas/patología , Vértebras Cervicales , Diagnóstico Diferencial , Neoplasias Esofágicas/diagnóstico , Neoplasias Esofágicas/patología , Esófago/patología , Femenino , Humanos , Imagen por Resonancia Magnética , Necrosis , Síndromes Paraneoplásicos del Sistema Nervioso/diagnóstico , Síndromes Paraneoplásicos del Sistema Nervioso/patología , Médula Espinal/patología , Enfermedades de la Médula Espinal/diagnóstico , Enfermedades de la Médula Espinal/patología , Vértebras TorácicasRESUMEN
Annexins (ANXs) constitute a family of Ca2+-dependent membrane-binding proteins; at least 20 of them have been described to date. Among these, Annexin A2 (ANXA2) has been revealed as a multi-functional protein in vitro. Its actual role in vivo, however, requires further investigation. We already reported that ANX-I (ANXA1) was up-regulated in hepatocellular carcinoma (HCC). The role of ANXA2 in various liver diseases including HCC remains obscure. In the present study, the protein and mRNA levels of ANXA2, as well as its localization, were determined for the normal human liver, chronic hepatitis liver, and non-tumorous and tumorous portions of HCC tissues. ANXA2 was rarely detected in either normal or chronic hepatitis liver tissues, whereas it was overexpressed at both the transcriptional and translational levels in tumorous and non-tumorous regions of HCC. In addition, in many cases, more ANXA2 was expressed in the tumorous portion than in the non-tumorous portion of HCC. The expression of ANXA2 was mainly localized in cancer cells, especially in poorly differentiated HCC. Furthermore, ANXA2 was tyrosine-phosphorylated in HCC. These data suggest that overexpression and tyrosine phosphorylation of ANXA2 play important roles in the malignant transformation process leading to HCC and are related to the histological grade of HCC.
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Anexina A2/análisis , Biomarcadores de Tumor/análisis , Carcinoma Hepatocelular/química , Cirrosis Hepática/metabolismo , Neoplasias Hepáticas/química , Adulto , Anciano , Anciano de 80 o más Años , Anexina A2/genética , Biomarcadores de Tumor/genética , Northern Blotting , Western Blotting , Carcinoma Hepatocelular/genética , Carcinoma Hepatocelular/patología , Femenino , Regulación Neoplásica de la Expresión Génica , Humanos , Cirrosis Hepática/genética , Cirrosis Hepática/patología , Cirrosis Hepática/virología , Neoplasias Hepáticas/genética , Neoplasias Hepáticas/patología , Masculino , Persona de Mediana Edad , Estadificación de Neoplasias , Fosforilación , ARN Mensajero/análisis , Tirosina , Regulación hacia Arriba , Adulto JovenRESUMEN
BACKGROUND AND AIM: The sensitivity of bile cytology is recognized as being low. Repeating cytological sampling is likely to improve the sensitivity. The aim of this study is to determine the optimal number of repeated cytological sampling of bile obtained via an endoscopic nasobiliary drainage (ENBD) tube for the diagnosis of malignant biliary stricture. METHODS: Ninety-eight patients with malignant biliary stricture who underwent ENBD were enrolled. Diagnoses included bile duct carcinoma (n = 53), pancreatic carcinoma (n = 28), carcinoma of the major papilla (n = 8), gallbladder carcinoma (n = 6), and hepatocellular carcinoma (n = 3). Bile was aspirated via an ENBD tube once a day and immediately evaluated cytologically. RESULTS: The median number of cytological samplings via an ENBD tube was 2.8 times (range, 1-10). In 40 of 98 patients with malignant biliary stricture, cytology was positive at the first cytological sampling (sensitivity 40.8%). Cytology was cumulatively positive in 71 of 98 patients (sensitivity 72.4%) from which repeated samples were taken. In 71 patients with positive cytology, correlation of the positive rate and the number of cytological samplings performed was investigated. In 68 of 71 (95.8%) patients with positive cytology, positive results were obtained by or at the sixth examination. CONCLUSIONS: Bile cytology via an ENBD tube is an easy method, and has been shown to have relatively high sensitivity. The optimal number of repeated cytological samplings using bile obtained via an ENBD tube for the diagnosis of malignant biliary stricture was concluded to be six.
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Bilis/citología , Colestasis/etiología , Neoplasias del Sistema Digestivo/patología , Endoscopios Gastrointestinales , Endoscopía del Sistema Digestivo/instrumentación , Intubación Gastrointestinal/instrumentación , Adulto , Anciano , Anciano de 80 o más Años , Neoplasias de los Conductos Biliares/complicaciones , Neoplasias de los Conductos Biliares/patología , Carcinoma Hepatocelular/complicaciones , Carcinoma Hepatocelular/patología , Carcinoma Ductal Pancreático/complicaciones , Carcinoma Ductal Pancreático/patología , Colestasis/patología , Neoplasias del Sistema Digestivo/complicaciones , Femenino , Neoplasias de la Vesícula Biliar/complicaciones , Neoplasias de la Vesícula Biliar/patología , Humanos , Neoplasias Hepáticas/complicaciones , Neoplasias Hepáticas/patología , Masculino , Persona de Mediana Edad , Neoplasias Pancreáticas/complicaciones , Neoplasias Pancreáticas/patología , Valor Predictivo de las Pruebas , Reproducibilidad de los Resultados , Estudios Retrospectivos , Sensibilidad y Especificidad , Succión/instrumentaciónRESUMEN
BACKGROUND: The aim of this study was to evaluate the usefulness of pancreatic duct brushing for diagnosis of pancreatic carcinoma. METHODS: Brush cytology was attempted in 58 patients suspected of having pancreatic malignancy because of stricture of the main pancreatic duct, confirmed by endoscopic retrograde cholangiopancreatography. Thirty-eight patients were finally diagnosed by an operation or the clinical course as having pancreatic carcinoma, and the remaining 20 patients as having chronic pancreatitis. The usefulness of brush cytology for diagnosis of pancreatic carcinoma was estimated. We interpreted failures of pancreatic duct brushing to be false negatives when the lesion was malignant. RESULTS: In 48 of 58 patients (82.8%), brushing was successfully performed and satisfactory specimens were obtained. Brush cytology was positive in 25 of 38 patients with pancreatic carcinoma (sensitivity 65.8%) and negative in all patients without malignancy (specificity 100%). Overall accuracy was 76.4%. During 2001-2005, the number of back-and-forth motions of the brush was increased to more than 30 times. The sensitivity significantly improved from 43.8% in 1997-2000 to 81.8% in 2001-2005 (P < 0.05). The increased success rate of brushing by improvement of skill in manipulating the guidewire and increased number of cells smeared on glass slides by increased back-and-forth motion of the brush may account for this improvement over time. Moreover, the sensitivity in 2001-2005 was 85.7% if failures of brushing with pancreatic carcinoma are excluded. No major complications occurred, except for two patients with a moderate grade of acute pancreatitis. CONCLUSIONS: Although further studies with a large number of patients are needed, our results suggest that with recent improvements of the brushing technique, pancreatic duct brushing is a useful and safe method for the differential diagnosis of malignancy from benign diseases of the pancreas.
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Biopsia/estadística & datos numéricos , Carcinoma/patología , Endoscopía del Sistema Digestivo/métodos , Conductos Pancreáticos/patología , Neoplasias Pancreáticas/patología , Adulto , Anciano , Anciano de 80 o más Años , Biopsia/métodos , Diagnóstico Diferencial , Femenino , Humanos , Masculino , Persona de Mediana Edad , Estadificación de Neoplasias , Reproducibilidad de los Resultados , Estudios RetrospectivosRESUMEN
BACKGROUND: The aim of this study was to evaluate the safety and usefulness of single and repetitive percutaneous transhepatic gallbladder aspiration (PTGBA) for the treatment of acute cholecystitis. METHODS: PTGBA was performed in patients with acute cholecystitis who showed no improvement after treatment with broad-spectrum antibiotics. PTGBA was carried out at bedside. When the bile was too thick to be aspirated through a 21-gauge needle, an 18-gauge needle was used. Aspiration of the gallbladder contents and injection of antibiotics into the gallbladder were performed without the placement of a drainage catheter. When improvement was not observed after the first attempt, PTGBA was repeated. RESULTS: Single PTGBA achieved improvement in 32 of 45 patients. In 11 of the remaining 13 patients, the second PTGBA was effective. In the remaining two patients, repetitive PTGBA was not carried out because of advanced cancer. In two of 45 patients, 18-gauge needles were necessary for PTGBA because of the high viscosity of the bile. PTGBA was carried out in three patients with blockage of the cystic duct by a stent, and it was effective in all three. Two patients whose conditions improved with a single PTGBA experienced a recurrence at 4 and 31 months, respectively, after PTGBA. No other severe complications related to PTGBA were observed in any patients. CONCLUSIONS: For the treatment of acute cholecystitis that does not react to conservative therapies, PTGBA is a safe, simple, and effective treatment modality that can be performed at bedside without any severe complications.
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Antibacterianos/administración & dosificación , Colecistitis Aguda/terapia , Drenaje/métodos , Vesícula Biliar , Enfermedad Aguda , Adulto , Anciano , Anciano de 80 o más Años , Terapia Combinada , Conducto Cístico/patología , Drenaje/efectos adversos , Femenino , Humanos , Masculino , Persona de Mediana Edad , Agujas , Recurrencia , Stents/efectos adversosRESUMEN
Although a number of studies have shown that vitamin K possesses antitumor activities on various neoplastic cell lines, there are few reports demonstrating in vivo antitumor effects of vitamin K, and the antitumor effect on colorectal cancer (CRC) remains to be examined. Therefore, antitumor effects of vitamin K on CRC were examined both in vitro and in vivo. Vitamins K2, K3 and K5 suppressed the proliferation of colon 26 cells in a dose-dependent manner, while vitamin K1 did not. On flow cytometry, induction of apoptosis by vitamins K2, K3 and K5 was suggested by population in sub-G1 phase of the cell cycle. Hoechst 33342 staining and a two-color flow cytometric assay using fluorescein isothiocyanate-conjugated annexin V and propidium iodide confirmed that vitamins K2, K3 and K5 induced apoptotic death of colon 26 cells. Enzymatic activity of caspase-3 in colon 26 cells was significantly up-regulated by vitamins K2, K3 and K5. The pan-caspase inhibitor, benzyloxycarbonyl-Val-Ala-Asp-fluoromethyl ketone, substantially prevented vitamin K-mediated apoptosis. In vivo study using syngeneic mice with subcutaneously established colon 26 tumors demonstrated that intravenous administration of vitamins K2, K3 and K5 significantly suppressed the tumor growth. The number of apoptotic tumor cells was significantly larger in the vitamin K-treated groups than in the control group. These results suggest that vitamins K2, K3 and K5 exerted effective antitumor effects on CRC in vitro and in vivo by inducing caspase-dependent apoptotic death of tumor cells, suggesting that these K vitamins may be promising agents for the treatment of patients with CRC.
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Antineoplásicos/farmacología , Apoptosis , Neoplasias Colorrectales/tratamiento farmacológico , Neoplasias/tratamiento farmacológico , Vitamina K 2/farmacología , Vitamina K 3/análogos & derivados , Vitamina K 3/farmacología , Animales , Línea Celular Tumoral , Relación Dosis-Respuesta a Droga , Fluoresceína-5-Isotiocianato/farmacología , Humanos , Ratones , Trasplante de Neoplasias , Propidio/farmacologíaRESUMEN
Responses of the liver to chronic injury include inflammation, regeneration and fibrosis, which finally lead to cirrhosis. The cause of liver cirrhosis appears to be impaired proliferative capability of hepatocytes caused by continuous hepatic damage, and subsequent accumulation of extracellular matrix produced by hepatic stellate cells (HSCs). Epidermal growth factor (EGF) and transforming growth factor-beta1 (TGF-beta1) play a crucial role in hepatocyte proliferation and hepatofibrogenesis, respectively. However, sequential analyses of the intrahepatic expression of EGF and TGF-beta1 in the course of cirrhosis development have not been examined fully. In the present study, liver cirrhosis was produced in rats by intraperitoneal administration of dimethylnitrosamine (DMN), and intrahepatic mRNA expression levels of proliferating cell nuclear antigen (PCNA), EGF and TGF-beta1 were quantitatively estimated by a real-time reverse transcription-polymerase chain reaction method. Histological and semiquantitative densitometric examination of liver sections revealed that the accumulation of extracellular matrix components was increased according to the period of DMN treatment. Histological examination of liver sections of rats treated with DMN for 4 and 6 weeks revealed pre-cirrhosis and cirrhosis, respectively. Intrahepatic mRNA expression levels of PCNA and EGF correlated well. Expression levels of both molecules were increased significantly during the course of cirrhosis development, but decreased significantly at the time of complete cirrhosis manifestation. In contrast, intrahepatic TGF-beta1 expression was increased significantly according to the period of DMN treatment, and reached a peak at the time of cirrhosis manifestation. These results suggest that proliferative capability of hepatocytes was impaired by continuous liver damage due, in part, to the decrease of a hepatocyte mitogen EGF, and that increased intrahepatic TGF-beta1 activated HSCs to retrieve space lost by hepatocyte destruction, resulting in complete cirrhosis manifestation.
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Factor de Crecimiento Epidérmico/genética , Cirrosis Hepática/metabolismo , Cirrosis Hepática/patología , Factor de Crecimiento Transformador beta1/genética , Animales , Colágeno/metabolismo , Dimetilnitrosamina/farmacología , Modelos Animales de Enfermedad , Progresión de la Enfermedad , Matriz Extracelular/metabolismo , Cirrosis Hepática/inducido químicamente , Cirrosis Hepática/genética , Masculino , Antígeno Nuclear de Célula en Proliferación/genética , ARN Mensajero/genética , Ratas , Ratas Sprague-DawleyRESUMEN
It is thought that the subcellular distribution of Src-family tyrosine kinases, including c-Yes binding to the cellular membrane, is membranous and/or cytoplasmic. c-Yes protein tyrosine kinase is known to be related to malignant transformation. However, the expression patterns of c-Yes in hepatocellular carcinoma (HCC) remains unknown. In the present study, we report that c-Yes is expressed not only in the membrane and cytoplasm, but also in the nuclei of cancer cells in some human HCC tissues and in a human HCC cell line. We examined the expression and localization of c-Yes in human HCC cell lines (HLE, HLF, PLC/PRF/5 and Hep 3B) by Western blotting and immunohistochemical analyses; we also examined the expression of c-Yes by immunohistochemistry and Western blotting in the tissues of various liver diseases, including 39 samples from HCC patients. We used an antibody array to detect proteins that bind to nuclear c-Yes in PLC/PRF/5 cell line. c-Yes was found to be expressed in the membranes and cytoplasm of HLE, HLF and Hep 3B HCC cells; it was also detected in the nuclei in addition to the membranes and cytoplasm of PLC/PRF/5 HCC cells. HCC with nuclear c-Yes was detected in 5 of 39 cases (13.0%), and nuclear c-Yes expression was not detected in normal, chronic hepatitis or cirrhotic livers. All HCCs with nuclear c-Yes expression were well-differentiated, small tumors at the early stages. In the PLC/PRF/5 cell line, the nuclear localization of c-Yes with cyclin-dependent kinase 1 was confirmed by a protein antibody array. In conclusion, nuclear c-Yes expression was found in cancer cells at the early stages of hepatocarcinogenesis, suggesting that nucleus-located c-Yes may be a useful marker to detect early-stage HCC.
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Carcinoma Hepatocelular/genética , Neoplasias Hepáticas/genética , Proteínas Proto-Oncogénicas c-yes/genética , Adulto , Anciano , Anciano de 80 o más Años , Anticuerpos Antineoplásicos/genética , Carcinoma Hepatocelular/patología , Línea Celular Tumoral , Núcleo Celular/patología , Femenino , Humanos , Inmunohistoquímica , Neoplasias Hepáticas/patología , Masculino , Persona de Mediana Edad , Estadificación de Neoplasias , Análisis de Secuencia por Matrices de OligonucleótidosAsunto(s)
Carcinoma Hepatocelular/metabolismo , Neoplasias Hepáticas/metabolismo , Proteínas Proto-Oncogénicas c-yes/metabolismo , Anciano , Carcinoma Hepatocelular/genética , Carcinoma Hepatocelular/patología , Transformación Celular Neoplásica/genética , Transformación Celular Neoplásica/metabolismo , Transformación Celular Neoplásica/patología , Femenino , Regulación Neoplásica de la Expresión Génica/genética , Hepatocitos/patología , Humanos , Neoplasias Hepáticas/genética , Neoplasias Hepáticas/patología , Masculino , Persona de Mediana Edad , Proteínas Proto-Oncogénicas c-yes/genéticaRESUMEN
Human alpha-fetoprotein (AFP) from serum of patients with cirrhosis and hepatocellular carcinoma (HCC) was separated into several bands by IEF and by erythroagglutinating phytohemagglutinin (E-PHA) affinity electrophoresis. These AFP bands were directly compared in 2-D IEF and E-PHA affinity electrophoresis. IEF of serum AFP was run in 1% agarose IEF gel with 3% Pharmalyte 4.5-5.4. After IEF, a part of the gel was stained for AFP and another part of the gel corresponding to the area of separated AFP bands was cut in 1 mm x 39 mm along the focused direction and transferred to a trough in 1% agarose gel with 0.3 mg/mL E(4)-PHA for second-dimensional affinity electrophoresis. Separated 2-D AFP spots were visualized by antibody-affinity blotting and identified by combining the systems of Johnson et al.. (Johnson, P. J., Ho, S., Cheng, P., Chan, A. et al.., Cancer 1995, 75, 1663-1668) for AFP-I-+IV and of Taketa et al.. (Taketa, K., Ichikawa, E., Taga, H., Hirai, H., Electrophoresis 1985, 6, 492-497) for AFP-P1-5. AFP-P2, the major AFP glycoform, was composed of AFP-I, AFP+I, and AFP+II; AFP-P3, a nonspecific monosialo-AFP, was composed of AFP+II; AFP-P4, HCC-specific monosialo-AFP, was composed of AFP+II, AFP+III, and AFP+IV; and malignancy-related AFP-P5 was composed of AFP+I and AFP+II. Monosialo-AFP (AFP+II) was recovered in all the glycoforms of AFP-P2, -P3, -P4, and -P5; thus, AFP-P4 is more specific to HCC than monosialylated AFP+II.
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Focalización Isoeléctrica/métodos , alfa-Fetoproteínas/aislamiento & purificación , Secuencia de Carbohidratos , Carcinoma Hepatocelular/química , Electroforesis en Gel de Agar/métodos , Humanos , Recién Nacido , Cirrosis Hepática/metabolismo , Neoplasias Hepáticas/química , Datos de Secuencia Molecular , Fitohemaglutininas , Isoformas de Proteínas/aislamiento & purificaciónRESUMEN
Liver cirrhosis is the fatal end stage of various chronic liver diseases. One of the most important causes of liver cirrhosis appears to be an impaired proliferative capability of hepatocytes caused by continuous hepatic damage. Hepatocyte growth factor (HGF) and its specific receptor, c-Met, play a pivotal role in hepatocyte proliferation. However, the relationship between the proliferative capability of hepatocytes and the intrahepatic expression of HGF and c-Met during the course of cirrhosis development has not been studied fully. In the present study, liver cirrhosis was produced in rats by intraperitoneally administering dimethylnitrosamine (DMN) and intrahepatic expression levels of HGF and c-Met were quantitatively estimated using a real-time reverse transcription-polymerase chain reaction (RT-PCR) method. Histological examination of liver sections and biochemical estimation of serum levels of transaminase revealed that the degree of hepatocyte destruction was elevated gradually during cirrhosis development in the DMN-induced rat cirrhosis model. The proliferative capability of hepatocytes estimated immunohistochemically by proliferating cell nuclear antigen staining was markedly increased at an early stage of cirrhosis development. However, it was gradually decreased thereafter and suppressed substantially at the time of cirrhosis manifestation. Intrahepatic HGF expression was also increased significantly during the course of cirrhosis development but decreased significantly at the time of cirrhosis manifestation. Conversely, there was a tendency for the intrahepatic expression of c-Met to decrease from an early stage of cirrhosis development and intrahepatic c-Met expression was decreased significantly at the time of cirrhosis manifestation. These results suggest that the highly proliferative capability of hepatocytes at an early stage of cirrhosis development is induced by increased intrahepatic HGF expression. However, both HGF and c-Met expression levels in the liver are decreased significantly there-after. Accordingly, the proliferative capability of hepatocytes is severely impaired and extracellular matrix components are deposited to retrieve space lost by the destruction of hepatic parenchyma, resulting in the establishment of liver cirrhosis.