Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 16 de 16
Filtrar
1.
Complement Ther Clin Pract ; 46: 101510, 2022 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-34749040

RESUMEN

BACKGROUND: Many middle-aged and older adults have more than one chronic health condition. It is therefore important to explore the effectiveness of interventions for multiple chronic conditions. Tai Chi is widely used in China and other countries, and many studies have examined the effect of Tai Chi on anxiety and depression. However, there are no systematic reviews of the effect of Tai Chi on anxiety and depression in various chronic conditions. This systematic review and meta-analysis aimed to evaluate the effects of Tai Chi on anxiety and depression symptoms in four chronic conditions: cancer, stroke, heart failure (HF), and chronic obstructive pulmonary disease (COPD). METHODS: We searched Chinese and English databases (Cochrane Library, PubMed, Web of Science, China National Knowledge Infrastructure (CNKI), China Science and Technology Journal Database (VIP), Wanfang Database, and Sinomed) from inception to October 2020. Review Manager version 5.2 and Stata version 12.0 were used to perform a systematic review. The quality of the included studies was evaluated using the Cochrane risk of bias tool. The study was registered with the PROSPERO database (number CRD42020209594). RESULTS: Of the 596 studies identified, we included 25 randomized controlled trials involving 1819 participants. Combined analysis of the four diseases showed statistically significant differences between the Tai Chi and control groups for anxiety symptoms (SMD -0.99, 95%CI: -1.5, -0.47; P < 0.01) and depressive symptoms (SMD 0.70, 95%CI: -1.01, -0.39; P < 0.01). Subgroup analyses showed statistically significant differences between the Tai Chi and control groups for depressive symptoms in stroke (SMD -0.43, 95%CI: -0.67, -0.18; P < 0.01) and HF (SMD -0.57, 95%CI: -0.8, -0.33; P < 0.01). However, no statistically significant differences were found for depressive symptoms in COPD or cancer. There were statistically significant differences between the Tai Chi and control groups for anxiety symptoms in stroke (SMD -0.60, 95%CI: -0.88, -0.32; P < 0.01) and cancer (SMD -0.69, 95%CI: -1.22, -0.17; P < 0.01), but not in COPD or HF. Subgroup, sensitivity, meta regression, and publication bias analyses showed high heterogeneity correlated with a single study and study quality. Sensitivity analysis showed that most meta-analysis results had good stability, but those for anxiety symptoms in COPD were unstable; therefore, careful interpretation is required. CONCLUSION: Tai Chi has a positive effect on anxiety and depression, especially for patients with cancer, stroke, and HF. However, given the weak evidence, this approach is not a substitute for psychiatric treatment.


Asunto(s)
Insuficiencia Cardíaca , Neoplasias , Enfermedad Pulmonar Obstructiva Crónica , Accidente Cerebrovascular , Taichi Chuan , Anciano , Ansiedad/etiología , Ansiedad/terapia , Depresión/etiología , Depresión/terapia , Insuficiencia Cardíaca/terapia , Humanos , Persona de Mediana Edad , Neoplasias/complicaciones , Neoplasias/terapia , Enfermedad Pulmonar Obstructiva Crónica/complicaciones , Enfermedad Pulmonar Obstructiva Crónica/terapia , Calidad de Vida , Accidente Cerebrovascular/complicaciones , Accidente Cerebrovascular/terapia
2.
Artículo en Inglés | MEDLINE | ID: mdl-33758502

RESUMEN

OBJECTIVE: To investigate the prevalence and the risk factors of COPD in the Uyghur population in the Kashi region. METHODS: From August 2018 to March 2019, we recruited participants of Uyghur ethnicity and aged ≥40 years old from the Kashi region using a combined cluster sampling and random sampling method. We collected potential risk factors using questionnaire, and conduced lung function using a portable pulmonary function instrument. RESULTS: A total of 2963 participants were included in this analysis, of whom 1268 were males and 1695 were females. There were 504 participants with COPD, generating a prevalence of 17.01%. With the increase of age, the prevalence of COPD in different genders increased significantly. The results of different regions were χ2= 627.89, p < 0.01, indicating significant differences in the prevalence in different regions. Among them, based on the existing survey data, it is speculated that Shache county has the highest crude prevalence, but the sample size needs to be further expanded. The participants with high age, smoking, lower BMI, high waist circumference, systolic blood pressure, fried cooking and barbecue share more COPD than those who partake of fruits and vegetables in this study. CONCLUSION: The prevalence of COPD among the Uyghur population in the Kashi region is higher than the national rural average. Among them, high age, smoking, low BMI, high waist circumference, high systolic blood pressure, cooking methods that may be stir-fried and deep-fried barbecue are risk factors for COPD, and vegetable and fruit intake may be a protective factor for COPD.


Asunto(s)
Enfermedad Pulmonar Obstructiva Crónica , Adulto , China/epidemiología , Femenino , Humanos , Masculino , Prevalencia , Enfermedad Pulmonar Obstructiva Crónica/diagnóstico , Enfermedad Pulmonar Obstructiva Crónica/epidemiología , Factores de Riesgo , Fumar/efectos adversos , Fumar/epidemiología , Encuestas y Cuestionarios
3.
Curr Med Sci ; 38(5): 880-887, 2018 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-30341524

RESUMEN

The efficacy and applied value of endoscopic hematoma evacuation vs. external ventricular drainage (EVD) in the treatment of severe ventricular hemorrhage (IVH) were explored and compared. From Jan. 2015 to Dec. 2016, the clinical data of 42 cases of IVH were retrospectively analyzed, including 18 patients undergoing endoscopic hematoma evacuation (group A), and 24 patients receiving EVD (group B). The hematoma clearance rate was calculated by 3D Slicer software, and complications and outcomes were compared between the two groups. There were no significant differences in age, sex and Graeb score between groups A and B (P>0.05). The hematoma clearance rate was 70.81%±27.64% in group A and 48.72%±36.58% in group B with a statistically significant difference (P<0.05). The operative time in groups A and B was 72.45±25.26 min and 28.54±15.27 min, respectively (P<0.05). The Glasgow Coma Scale (GCS) score increased from 9.28±2.72 at baseline to 11.83±2.91 at 1 week postoperatively in group A, and from 8.25±2.62 at baseline to 10.79±4.12 at 1 week postoperatively in group B (P<0.05). The length of hospital stay was 12.67±5.97 days in group A and 17.33±8.91 days in group B with a statistically significant difference (P<0.05). The GOS scores at 6 months after surgery were 3.83±1.12 in group A, and 2.75±1.23 in group B (P<0.05). These results suggested that endoscopic hematoma evacuation has an advantage of a higher hematoma clearance rate, fewer complications and better outcomes in the treatment of severe IVH, indicating it is a safe, effective and promising approach for severe IVH.


Asunto(s)
Hemorragia Cerebral Intraventricular/cirugía , Ventrículos Cerebrales/cirugía , Drenaje/métodos , Endoscopía/métodos , Anciano , Hemorragia Cerebral Intraventricular/fisiopatología , Ventrículos Cerebrales/fisiopatología , Drenaje/efectos adversos , Endoscopía/efectos adversos , Femenino , Fibrinolíticos/administración & dosificación , Escala de Coma de Glasgow , Hematoma/fisiopatología , Hematoma/cirugía , Humanos , Inyecciones Intraventriculares , Masculino , Persona de Mediana Edad , Estudios Retrospectivos , Índice de Severidad de la Enfermedad , Resultado del Tratamiento
4.
J Int Med Res ; 46(7): 2976-2982, 2018 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-29756504

RESUMEN

Although the infectious diseases tuberculosis (TB) and cryptococcosis both cause formation of single or multiple nodules in immunodeficient hosts, cases of co-infection of these diseases are rarely seen. We report a patient who was co-infected with TB and cryptococcosis. A male patient with no clinical evidence of immunodeficiency presented with a 3-week history of abdominal distension accompanied by oedema of recurring lower extremities. The patient was diagnosed with tuberculous peritonitis and tuberculous pleurisy by an abdominal puncture biopsy. Several months after being treated for TB, the patient was diagnosed with Cryptococcus infection and received antifungal treatment. Computed tomographic and magnetic resonance imaging findings suggested that treatment was effective. This case illustrates the challenges encountered during assessment of neoplasms associated with TB and cryptococcosis. Differential diagnosis requires an abdominal puncture biopsy. Diagnosis of Cryptococcus infection also requires a positive cryptococcal culture and positive India ink staining analysis. Notably, our patient also showed no obvious symptoms of cryptococcosis after receiving anti-TB treatment. Accordingly, in this report, we discuss the possible pathogenic mechanisms that underlie the coincidence of both types of inflammatory lesions. We emphasize the need for a greater awareness of atypical presentations of TB accompanied by Cryptococcus infection.


Asunto(s)
Coinfección/diagnóstico , Criptococosis/diagnóstico , Enfermedades Pulmonares/diagnóstico , Peritonitis Tuberculosa/diagnóstico , Pleuresia/diagnóstico , Tuberculosis Pleural/diagnóstico , Antifúngicos/uso terapéutico , Antituberculosos/uso terapéutico , Coinfección/tratamiento farmacológico , Criptococosis/tratamiento farmacológico , Humanos , Enfermedades Pulmonares/tratamiento farmacológico , Masculino , Persona de Mediana Edad , Peritonitis Tuberculosa/tratamiento farmacológico , Pleuresia/tratamiento farmacológico , Tuberculosis Pleural/tratamiento farmacológico
5.
Cell Biochem Funct ; 34(3): 133-41, 2016 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-26916087

RESUMEN

EPB41L3 may play a role as a metastasis suppressor by supporting regular arrangements of actin stress fibres and alleviating the increase in cell motility associated with enhanced metastatic potential. Downregulation of epb41l3 has been observed in many cancers, but the role of this gene in esophageal squamous cell carcinoma (ESCC) remains unclear. Our study aimed to determine the effect of epb41l3 on ESCC cell migration and invasion. We investigated epb41l3 protein expression in tumour and non-tumour tissues by immunohistochemical staining. Expression in the non-neoplastic human esophageal cell line Het-1a and four ESCC cell lines - Kyse150, Kyse510, Kyse450 and Caes17 - was assessed by quantitative Polymerase Chain Reaction (qPCR) and Western blotting. Furthermore, an EPB41L3 overexpression plasmid and EPB41L3-specific small interfering RNA were used to upregulate EPB41L3 expression in Kyse150 cells and to downregulate EPB41L3 expression in Kyse450 cells, respectively. Cell migration and invasion were evaluated by wound healing and transwell assays, respectively. The expression levels of p-AKT, matrix metalloproteinase (MMP)2 and MMP9 were evaluated. Expression of epb41l3 was significantly lower in tumour tissues than in non-tumour tissues and in ESCC cell lines compared with the Het-1a cell line. Kyse450 and Caes17 cells exhibited higher expression of epb41l3 than Kyse150 and Kyse510 cells. Overexpressing epb41l3 decreased Kyse150 cell migration and invasion, whereas EPB41L3-specific small interfering RNA silencing increased these functions in Kyse450 cells. Furthermore, overexpressing epb41l3 led to downregulation of MMP2 and MMP9 in Kyse150 and Kyse510 cells. Our findings reveal that EPB41L3 suppresses tumour cell invasion and inhibits MMP2 and MMP9 expression in ESCC cells.


Asunto(s)
Carcinoma de Células Escamosas/metabolismo , Carcinoma de Células Escamosas/patología , Neoplasias Esofágicas/metabolismo , Neoplasias Esofágicas/patología , Metaloproteinasa 2 de la Matriz/biosíntesis , Metaloproteinasa 9 de la Matriz/biosíntesis , Proteínas de Microfilamentos/metabolismo , Western Blotting , Carcinoma de Células Escamosas/genética , Movimiento Celular , Regulación hacia Abajo , Neoplasias Esofágicas/genética , Carcinoma de Células Escamosas de Esófago , Humanos , Metaloproteinasa 2 de la Matriz/genética , Metaloproteinasa 9 de la Matriz/genética , Proteínas de Microfilamentos/genética , Reacción en Cadena de la Polimerasa de Transcriptasa Inversa , Células Tumorales Cultivadas
6.
Int J Clin Exp Med ; 8(6): 10132-42, 2015.
Artículo en Inglés | MEDLINE | ID: mdl-26309712

RESUMEN

Puerarin has been widely used in clinical treatment and experiment research and is considered to exert an anticancer effect recently. The present study investigated the anticancer activity of puerarin in U251 and U87 human glioblastoma cells. The cells were treated with puerarin at various concentrations for different times. Cell viability and cell proliferation were detected by cell counting kit-8 (CCK-8) assay and 5-ethynyl-2'-deoxyuridine (EdU) staining respectively. Cell cycle and apoptosis were measured separately with PI staining and Annexin V-FITC/PI double staining method by flow cytometry. DNA damage of glioblastoma cells caused by puerarin exposure was evaluated by γ-H2AX foci detection, and the expressions of p-AKT, caspase-3 and apoptosis-related proteins were detected by Western blotting after puerarin treatment. Cell viability and proliferation of glioblastoma cells treated with puerarin were significantly lower than that of the control group; the apoptosis rate increased obviously compared to the control group. Puerarin significantly decreased the proportion at G1 phase of cell cycling accompanied by increased populations at the S and G2/M phases in both cell lines. At the same time, DNA damage level of puerarin treated cells was significantly higher than that in the control cells. Moreover, puerarin treatment suppressed the expression of p-Akt and Bcl-2 and promoted the expression of Bax and cleaved caspase-3 in U251 cells. These findings indicate that puerarin exerts antitumor effects both in U251 and U87 cells.

7.
Int J Clin Exp Med ; 7(12): 5067-74, 2014.
Artículo en Inglés | MEDLINE | ID: mdl-25664006

RESUMEN

Growing evidence indicates that deregulation of miRNAs contributes to the development of glioma. In present study, we found that the level of miRNA-19a was significantly elevated in glioma tissues and cell lines. Moreover, down-regulation of miRNA-19a dramatically repressed glioma cell growth in vitro and in vivo. Meanwhile, the expression of LRIG1, a tumor suppressor in glioma, was increased following miRNA-19a knockdown. Furthermore, luciferase reporter assay confirmed that LRIG1 was a direct target of miRNA-19a. In addition, silencing of LRIG1 could reverse the suppressive effect of miRNA-19a inhibitor. Taken together, our results demonstrated that down-regulation of miRNA-19a could suppress the growth of glioma cells, at least in part, through up-regulating LRIG1.

9.
Asian Pac J Cancer Prev ; 13(10): 5263-72, 2012.
Artículo en Inglés | MEDLINE | ID: mdl-23244147

RESUMEN

BACKGROUND: Gastric cancer (GC) is one of the most common cancers in China. Adjuvant chemotherapy (AC) is a routine auxiliary treatment for GC recommended by the guidelines issued in 2011 by the Ministry of Health of the People's Republic of China, but the relevant credible consequences in China have been insufficient because of China's late start and ethical concerns. METHODS: A series of databases, including Cochrane Library, MEDLINE, EMBASE, the Chinese database of the National Knowledge Infrastructure and the VIP database, were searched by 2 reviewers independently for studies investigating AC for GC through March 2012. The retrieved literature was screened according to the eligibility criteria. RESULTS: A total of 35 randomized control trials (RCTs) were subjected to the final analysis, including 4,043 patients in treatment group and 3,884 in the control group, as well as 4 clinical-control trials (CCTs), which accessed the final analysis with 238 and 252 patients, respectively. AC reduced the risk of death as a protective treatment with statistical significance (HR=0.91, 95%CI: [0.85, 0.97], P=0.002), and it seemed more effective for Asian than non-Asian patients. The effects of AC were not influenced by the starting time (P>0.05). D2 lymphadenectomy-based chemotherapy was effective (HR=0.89, 95%CI: [0.80, 0.99], P=0.04). Oral S-1 40 mg/m2 after D2 lymphadenectomy might be a better choice for Asians with advanced GC and might result in a greater reduction of adverse events than in non-Asian patients. GRADE quality assessment determined that the strength of the evidence from foreign studies from Europe, the United States and Asian countries other than China was high, while it was moderate for Chinese studies. CONCLUSION: AC was effective or even curative in Chinese patients in general, although it is still necessary to optimize a targeted AC scheme for Chinese patients with GC.


Asunto(s)
Antineoplásicos/uso terapéutico , Neoplasias Gástricas/tratamiento farmacológico , Pueblo Asiatico , Quimioterapia Adyuvante , Humanos , Pronóstico , Ensayos Clínicos Controlados Aleatorios como Asunto , Literatura de Revisión como Asunto
10.
Zhonghua Jie He He Hu Xi Za Zhi ; 33(10): 742-5, 2010 Oct.
Artículo en Chino | MEDLINE | ID: mdl-21176504

RESUMEN

OBJECTIVE: This study was undertaken to describe the viral etiology and clinical features in patients with influenza-like illness (ILI) in Guangzhou. METHODS: The nasopharyngeal and throat swabs were collected from 882 patients presenting with ILI between January and September, 2009. Viral pathogens were cultured and identified by immunofluorescence technique using the Shell-Vial method. The clinical data were statistically analyzed. RESULTS: (1) Viral etiology. Of the 882 samples, 385 (43.7%) were confirmed to have at least one of the 9 different respiratory viruses detected. Among these viral isolates, 67.3% (259/385) were seasonal influenza A virus, 27.8% (107/385) were influenza B virus, and 1.3% (5/385) were human parainfluenza virus (PHIV) 1, 2, or 3. In addition, 2 cases (0.5%) of each adenovirus, HSV-1, enterovirus and respiratory syncytial virus (RSV) were also found in the samples. Co-infections with more than one virus were revealed in 8 (2.1%) of 385 samples tested, among them 6 samples were mixture of influenza A and influenza B, 1 sample was positive for both influenza B virus and HPIV-3, and 1 was for both adenovirus and RSV. Seasonal influenza B virus appeared endemic between March and May, and seasonal influenza A virus became dominant between June and August. (2) Clinical features. The percentage of patients aged from 18-30 years was much higher than that of other age groups. The most common symptoms were moderate fever and sore throat, followed by cough. The percentage of upper respiratory infection and pneumonia was 88.4% (727/882) and 10.7% (95/882) respectively. Clinical features did not discriminate between patients with seasonal influenza A and those with influenza B virus infection. The average numbers of leukocytes and lymphocytes were lower in the group positive for influenza viruses than in virus negative group. The patients with adenovirus, HPIV and RSV infection were significantly younger. No rash was observed in patients with enterovirus or HSV infection. CONCLUSIONS: (1) Seasonal influenza virus was the major viral etiologic agent of ILI in Guangzhou during the first 9 months in 2009. Influenza B and A viruses seasonally prevailed in spring and summer, respectively, while other viral etiologic agents appeared to be sporadic. (2) The analysis of clinical features in patients with ILI indicated that fever was the most common symptom, with body temperature varying greatly, and may be associated with evident respiratory and occasionally systemic symptoms. Among the cases with viral infection, the upper respiratory presentation was universal, and pneumonia was frequently noticed.


Asunto(s)
Gripe Humana/epidemiología , Gripe Humana/virología , Orthomyxoviridae/aislamiento & purificación , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , China/epidemiología , Femenino , Herpesvirus Humano 1/aislamiento & purificación , Humanos , Virus de la Influenza A/aislamiento & purificación , Virus de la Influenza B/aislamiento & purificación , Gripe Humana/diagnóstico , Masculino , Persona de Mediana Edad , Virus Sincitiales Respiratorios/aislamiento & purificación , Adulto Joven
11.
J Gastroenterol Hepatol ; 22(6): 862-9, 2007 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-17504260

RESUMEN

BACKGROUND AND AIM: It has recently been reported that Toll-like receptor 4 (TLR4) is involved in cellular responses to lipopolysaccharides (LPS) and early liver injury induced by LPS. The aim of the present study was to investigate the alterations of TLR4 gene expression in liver tissues and Kupffer cells during the course of carbon tetrachloride (CCl(4))-induced chronic liver injury and fibrosis and its role in liver injury. METHODS: Rats were induced with liver injury and fibrosis by CCl(4) administered subcutaneously twice weekly for up to 8 weeks. The Kupffer cells were isolated by the combined collagenase-pronase perfusion method and incubated with varying doses of LPS. The mRNA expression of TLR4 in liver tissues and Kupffer cells was measured by reverse transcriptase polymerase chain reaction. The levels of tumor necrosis factor (TNF)-alpha in Kupffer cell culture supernatants were determined by enzyme-linked immunosorbent assay. The plasma levels of the endotoxin were determined by chromogenic substrate limulus amebocyte lysate assay. The association of the endotoxin receptor expression with plasma endotoxin levels was assessed. RESULTS: CCl(4) administration elicited extensive changes in liver morphology, including steatosis, inflammation, necrosis, and fibrosis. Low levels of TLR4 mRNA were detected in normal rat liver tissues, but no expression was detected in the Kupffer cells. The expression of TLR4 mRNA in liver tissues and Kupffer cells was increased 2 weeks after CCl(4) administration, peaked at 4 and 6 weeks, and declined at 8 weeks. Basic TNF-alpha production of Kupffer cells isolated from CCl(4)-treated rats at 4 and 6 weeks was significantly higher than that of normal rats (P < 0.05). Upon LPS stimulation, production of TNF-alpha was markedly increased in Kupffer cells isolated from normal and 2-,4-, and 6-week CCl(4)-treated rats. Moreover, LPS-induced TNF-alpha production was dose-dependent. The plasma levels of the endotoxin were increased during the time of liver injury. There was a correlation between plasma endotoxin levels and TLR4 gene expression in the early and middle stage of liver injury. CONCLUSION: The gene expression of TLR4 was upregulated during the course of CCl(4)-induced liver injury, which is associated with the degree of liver injury and Kupffer cell activation. The gut-derived endotoxin may be involved in the upregulation of TLR4 expression.


Asunto(s)
Cirrosis Hepática Experimental/metabolismo , Receptor Toll-Like 4/metabolismo , Animales , Intoxicación por Tetracloruro de Carbono , Células Cultivadas , Macrófagos del Hígado/metabolismo , Cirrosis Hepática Experimental/inducido químicamente , Ratas , Ratas Wistar , Reacción en Cadena de la Polimerasa de Transcriptasa Inversa , Factor de Necrosis Tumoral alfa/metabolismo
12.
World J Gastroenterol ; 12(8): 1292-5, 2006 Feb 28.
Artículo en Inglés | MEDLINE | ID: mdl-16534888

RESUMEN

AIM: To evaluate the validity of ultrasonographic and pathologic diagnosis of liver fibrosis in patients with chronic viral hepatitis. METHODS: The liver fibrosis status in 324 patients was evaluated by both needle biopsy and ultrasonography. Liver fibrosis was divided into S0-S4 stages. S4 stage was designated as definite cirrhosis. The ultrasonographic examination included qualitative variables, description of liver surface and parenchyma, and quantitative parameters, such as diameter of vessels, blood flow velocity and spleen size. RESULTS: Ultrasonographic qualitative description of liver surface and parenchyma was related with the severity of fibrosis. Among the quantitative ultrasonographic parameters, cut-off value of spleen length (12.1 cm) had a sensitivity of 0.600 and a specificity of 0.753 for diagnosis of liver cirrhosis. The diameters of spleen (8 mm) and portal vein (12 mm) had a diagnostic sensitivity of 0.600 and 0.767, and a diagnostic specificity of 0.781 and 0.446, respectively. The diagnostic accuracy for liver cirrhosis was moderately satisfactory, and the negative predictive values of these parameters reached near 0.95. CONCLUSION: Ultrasonography can predict the degree of liver fibrosis or cirrhosis. A single ultrasonographic parameter is limited in sensitivity and specificity for the diagnosis of early cirrhosis. The presence or absence of liver cirrhosis in patients with chronic virus hepatitis can be detected using 2 or 3 quantitative and qualitative parameters, especially the length of spleen, the diameter of spleen vein and echo pattern of liver surface.


Asunto(s)
Hepatitis Viral Humana/complicaciones , Cirrosis Hepática/diagnóstico por imagen , Cirrosis Hepática/patología , Ultrasonografía Doppler , Adolescente , Adulto , Biopsia con Aguja , Enfermedad Crónica , Interpretación Estadística de Datos , Progresión de la Enfermedad , Femenino , Hepatitis Viral Humana/patología , Humanos , Hígado/patología , Cirrosis Hepática/etiología , Masculino , Persona de Mediana Edad , Estudios Prospectivos , Sensibilidad y Especificidad , Bazo/irrigación sanguínea , Bazo/patología
13.
Hepatology ; 42(6): 1437-45, 2005 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-16317674

RESUMEN

A model was constructed consisting of clinical and serum variables to discriminate between hepatitis B e antigen (HBeAg)-positive chronic hepatitis B (CHB) patients with and without significant fibrosis (stages 2-4 vs. stages 0-1). Consecutive treatment-naive CHB patients who underwent liver biopsy were divided into 2 sequential groups: a training group (n = 200) and a validation group (n = 172). Multivariate analysis identified alpha2-macroglobulin, age, gamma glutamyl transpeptidase, and hyaluronic acid as independent predictors of fibrosis. The area under the receiver operating characteristic curve was 0.84 for the training group and 0.77 for the validation group. Using a cutoff score of <3.0, the presence of significant fibrosis (F2 to F4) could be excluded with high accuracy (86.1% negative predictive value [NPV], 70.1% positive predictive value [PPV], and 94.8% sensitivity) in 43 (21.5%) of 200 patients in the training group, and with the same certainty (90.9% NPV, 64.7% PPV, and 98.0% sensitivity) in 22 (12.8%) of 172 patients in the validation group. Similarly, applying a cutoff score of >8.7, the presence of significant fibrosis could be correctly identified with high accuracy (91.1% PPV, 51.6% NPV, and 95.2% specificity) in 41 (20.5%) of 200 patients in the training group, and with the same certainty (84.8% PPV, 52.4% NPV, and 90.4% specificity) in 39 (22.7%) of 172 patients of the validation group. In conclusion, a predictive model with a combination of easily accessible variables identified HBeAg-positive CHB patients with and without significant fibrosis with a high degree of accuracy. Application of this model may decrease the need for liver biopsy in staging of 35.5% CHB.


Asunto(s)
Antígenos e de la Hepatitis B/análisis , Hepatitis B Crónica/complicaciones , Cirrosis Hepática/etiología , Adolescente , Adulto , Anciano , Alanina Transaminasa/sangre , Área Bajo la Curva , Femenino , Hepatitis B Crónica/sangre , Humanos , Ácido Hialurónico/sangre , Masculino , Persona de Mediana Edad , gamma-Glutamiltransferasa/sangre
14.
Chin J Dig Dis ; 6(3): 137-41, 2005.
Artículo en Inglés | MEDLINE | ID: mdl-16045604

RESUMEN

OBJECTIVE: To investigate the expression of CD14 on Kupffer cells during the course of carbon tetrachloride (CCl(4))-mediated liver injury and its role in the activation of Kupffer cells. METHODS: Rats were administered CCl(4) twice weekly for up to 8 weeks. Kupffer cells were isolated from normal and CCl(4)-treated rats by the combined 'collagenase-pronase' perfusion method, discontinuous density gradient centrifugation. On the day after isolation, the cells were incubated with RPMI-1640 containing varying doses of lipopolysaccharide (LPS) for 6 h. Supernatants were then collected for measuring the concentration of tumor necrosis factor-alpha (TNF-alpha) by enzyme-linked immunosorbent assay (ELISA). The expression of CD14 mRNA on Kupffer cells were determined by RT-PCR. The plasma concentrations of endotoxin were determined by chromogenic substrate Limulus amebocyte lysate assay. RESULTS: Basic TNF-alpha production of Kupffer cells isolated from CCl(4)-treated rats at 4 and 6 weeks was significantly higher than that of normal (P < 0.05). Following LPS stimulation the production of TNF-alpha was markedly increased in Kupffer cells from the 2-, 4- and 6-week treatment groups (P < 0.05). Moreover, LPS-induced TNF-alpha production was dose-dependent. CD14 mRNA expression on Kupffer cells isolated from CCl(4)-treated rats was elevated following 2 weeks of CCl(4) administration and the maximum elevation occurred at 6 weeks. Gene expression was decreased in Kupffer cells after 8 weeks of CCl(4) treatment. CCl(4) administration elicited extensive changes in liver morphology, including steatosis, inflammation and necrosis. The plasma concentrations of endotoxin of CCl(4)-treated rats were increased during the time of liver injury. CONCLUSION: Up-regulation of CD14 expression in Kupffer cells during CCl(4)-mediated chronic liver injury indicates cell activation and that they are more sensitive to LPS stimulation. Kupffer cells are critical effector cells in the early stage of liver injury.


Asunto(s)
Tetracloruro de Carbono/toxicidad , Macrófagos del Hígado/efectos de los fármacos , Macrófagos del Hígado/inmunología , Receptores de Lipopolisacáridos/genética , Hígado/efectos de los fármacos , Hígado/inmunología , Animales , Secuencia de Bases , Femenino , Expresión Génica/efectos de los fármacos , Técnicas In Vitro , Lipopolisacáridos/sangre , Lipopolisacáridos/farmacología , Hígado/lesiones , Masculino , ARN Mensajero/genética , ARN Mensajero/metabolismo , Ratas , Ratas Wistar , Factor de Necrosis Tumoral alfa/biosíntesis
15.
Zhonghua Gan Zang Bing Za Zhi ; 13(2): 117-20, 2005 Feb.
Artículo en Chino | MEDLINE | ID: mdl-15727698

RESUMEN

OBJECTIVE: It is important to use noninvasive methods to differentiate liver fibrosis and liver cirrhosis. A prospective study was conducted to evaluate the validity of ultrasonography (US) in evaluating the severity of liver fibrosis in patients with chronic viral hepatitis in reference to the pathologic diagnosis of their liver biopsy specimens. METHODS: The liver fibrosis status of 324 chronic viral hepatitis patients was evaluated by both needle biopsy and US. Histologically their liver fibrosis was graded as S0-S4, and the inflammatory reaction in the liver was graded as G1-G4. The US examination included qualitative description of the liver surface and liver parenchyma, and the quantitative parameters were vascular diameters, blood flow volume and spleen size. RESULTS: US qualitative description of the liver surface and liver parenchyma was correlated to the severity of fibrosis and the degree of the inflammation seen in the liver biopsies. An analysis of US quantitative parameters showed that a cut-off value of 12.1 cm for the length of spleen had a sensitivity of 60.0%, and specificity of 75.3% in detecting early liver fibrosis. For other quantitative parameters, the cut-off values were 8mm for the diameter of the splenic vein, 30.5 cm/sec for maximal blood flow velocity in the portal vein and 12 mm in diameter of the main portal vein. The diagnostic sensitivities for these parameters were 60.0%, 78.6% and 76.7%; the diagnostic specificities were 78.1%, 66.9% and 44.6% respectively. CONCLUSION: Early cirrhosis can be detected by US, and the sonographic results were well paralleled with their pathologic diagnoses made by liver biopsies. Individual US parameter has limited sensitivity and specificity in diagnosing early cirrhosis. In clinical practice a combination of 2-3 parameters could be used to detect or exclude severe liver fibrosis.


Asunto(s)
Hepatitis B Crónica/complicaciones , Cirrosis Hepática/diagnóstico por imagen , Adulto , Femenino , Hepatitis B Crónica/diagnóstico por imagen , Hepatitis C Crónica/complicaciones , Hepatitis C Crónica/diagnóstico por imagen , Humanos , Cirrosis Hepática/virología , Masculino , Estudios Prospectivos , Ultrasonografía
16.
World J Gastroenterol ; 9(11): 2574-8, 2003 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-14606100

RESUMEN

AIM: To explore the grade and stage of pathology and the relationship between grading and staging of hepatic fibrosis and noninvasive diagnostic parameters. METHODS: Inflammatory activity and fibrosis of consecutive liver biopsies from 200 patients with chronic liver disease were determined according to the Diagnostic Criteria of Chronic Hepatitis in China, 1995. A comparative analysis was made in these patients comparing serum markers, Doppler ultrasonography, CT and/or MR imaging with the findings of liver biopsy. RESULTS: With increase of inflammatory activity, the degree of fibrosis also rose. There was a close correlation between liver fibrosis and inflammatory activity. AST, GGT, albumin, albumin/globulin, ALP, AFP, hyaluronic acid, N-terminal procollagen III(P III NP), collagen type IV(Col IV), tissue inhibitors of metalloproteinases-1 (TIMP-1), alpha-2-macroglobulin, natural killer cells(NK), some parameters of Doppler ultrasonography, CT and/or MR imaging were all related to the degree of inflammatory activity. GGT, albumin, albumin/globulin, ALP, AFP, hyaluronic acid, Col IV, TIMP-1, alpha-2- macroglobulin, transforming growth factor-beta 1 (TGFbeta1), NK, some parameters of Doppler ultrasonography, CT and/or MR imaging were all related to the staging of fibrosis. By regression analysis, the parameters used in combination to differentiate the presence or absence of fibrosis were age, GGT, the parameter of blood flow of portal vein per minute, the maximum oblique diameter of right liver by B ultrasound, the wavy hepatic surface contour by CT and/or MR. The sensitivity, specificity and accuracy of the above parameters were 80.36%, 86.67%, and 81.10%, respectively. CONCLUSION: There is close correlation between liver fibrosis and inflammatory activity. The grading and staging of liver fibrosis are related to serum markers, Doppler ultrasonography, CT and/or MR imaging. The combination of the above mentioned noninvasive parameters are quite sensitive and specific in the diagnosis of hepatic fibrosis.


Asunto(s)
Cirrosis Hepática/patología , Índice de Severidad de la Enfermedad , Adolescente , Adulto , Biomarcadores , Biopsia , Femenino , Humanos , Cirrosis Hepática/diagnóstico por imagen , Imagen por Resonancia Magnética , Masculino , Persona de Mediana Edad , Sensibilidad y Especificidad , Tomografía Computarizada por Rayos X , Ultrasonografía Doppler
SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA