[PD-1/PD-L1 expressions in liver tissues of patients with chronic HBV infection].

Objective: To detect and compare the PD-1/PD-L1 (programmed death 1/programmed death 1 ligand) expressions in the liver tissues of chronic HBV infection patients in immune tolerant phase and those in immune clearance phase.

Methods: Liver biopsy samples were divided into two groups: 25 samples from patients in immune clearance phase and 19 samples from patients in immune tolerant phase. PD-1/PD-L1 expressions on T lymphocytes in these liver biopsy specimens were detected by immunohistochemistry method.

Gpc-3 is a notable diagnostic, prognostic and a latent targeted therapy marker in hepatocellular carcinoma.

Background/aims: To describe the features of the Gpc-3, explore the significance and value about the role of Gpc-3 in pathological diagnosis and prognostic evaluation of hepatocellular carcinoma.

Methodology: Take an overview of Gpc-3 expression in hepatocellular carcinoma and its expression of the relationship between the clinicopathological features of hepatocellular carcinoma, analysis the expression of Gpc-3 in liver cell adenoma, heterosexual hyperplasia and hepatitis C.

Results: The expression of GPC-3 has a certain amount of specificity and sensitivity in hepatocellular carcinoma.

Glutamine synthetase as an early marker for hepatocellular carcinoma based on proteomic analysis of resected small hepatocellular carcinomas.

Background: Hepatocellular carcinoma (HCC) is a highly malignant tumor with a poor prognosis. Because small HCCs possess most of the characteristics of early HCC, we investigated small HCCs to screen potential biomarkers for early diagnosis.

Methods: Proteins were extracted from 10 sets of paired tissue samples from HBV-infected small-HCC patients.

[Expression of intrahepatic CD4+ CD25+ regulatory T cells in patients with chronic hepatitis B].

Objective: To investigate the expression and distribution of intrahepatic CD4+ CD25+ regulatory T cells in immuno-tolerant and immuno-clearance phase of patients with chronic hepatitis B.

Methods: The expression of FoxP3 was detected in 19 cases of immuno-tolerant phase and 12 cases of immuno-clearance phase by immunohistochemistry. The relation between the intrahepatic expression of FoxP3 and the clinicopathological features were analyzed.

[The prediction and validation of liver fibrosis by a noninvasive model and validation in patients with chronic hepatitis B].

Objective: To develop a simple model for the noninvasive diagnosis of liver fibrosis in patients with chronic hepatitis B and to testify its diagnostic value.

Methods: One hundred and ninety patients with chronic hepatitis B who had undergone liver biopsy were divided into 2 groups: one for developing the model (n = 110) and one for validation (n= 80). Histological staging of liver fibrosis, assessed blindly and independently by 2 pathologists, was determined according to Scheuer fibrosis score.

[Detection of CD4+CD25+ regulatory T cells in liver tissues of fibrosing cholestatic hepatitis after liver and kidney transplantation].

Objectives: To study the expression and distribution of CD4+CD25+ regulatory T cells (Treg) in liver tissues of patients with fibrosing cholestatic hepatitis (FCH) after liver and kidney transplantation and to investigate their roles in the pathogenesis of FCH.

Methods: Liver biopsy specimens from five patients with FCH were studied histopathologically. A specific marker for CD4+CD25+ regulatory T cells in those specimens was detected with anti-FOXP3 monoclonal antibody by immunohistochemistry.

[Pathology of AIDS-related lymphadenopathy and its relationship to expression of CD4 + CD25 + regulatory T cells in lymphoid node tissue].

Objective: To observe the pathology of AIDS-related lymphadenopathy and its relationship to the expression and distribution of CD4 + CD25 + regulatory T cells in lymphoid node tissue.

Methods: Totally 22 biopsy and 13 autopsy lymphoid node tissues from HIV-positive patients were examined under microscopy and pathological staging was performed. Specific marker for CD4 + CD25 + regulatory T cells in lymphoid node tissue was detected with anti-Foxp3 monoclonal antibody by immunohistochemistry.

Influence of HBcAg in liver cell plasma on expression of transforming growth factor-beta 1 in liver tissue of low-grade chronic hepatitis B patients.

Aim: To study the influence of HBcAg on the expression of transforming growth factor-beta 1 (TGF-beta1) in liver tissue of low-grade chronic hepatitis B (CHB) patients.

Methods: The expression of TGF-beta1 and HBcAg in liver samples from 93 low-grade CHB patients was detected by immunohistochemistry and valuated by semi-quantitative scoring.

Results: In the 93 low-grade CHB patients, HBcAg was expressed in cell plasma but not in the liver tissue.

[A pathological study on liver tissues of patients with HIV infection].

Objective: To study the pathological changes of the liver tissues of patients with HIV infection.

Methods: 14 biopsy and 12 autopsy liver tissues were examined histologically. HIV-1 related antigen of outer membrane protein gp120 and capsid protein p24 were examined with their corresponding monoclonal antibodies by immunohistochemistry.

Significant correlation between expression level of HSP gp96 and progression of hepatitis B virus induced diseases.

Aim: Gp96, also known as Grp94, is a member of heat shock protein (HSP) family and binds repertoires of peptides thereof eliciting peptide-specific T cell immune responses. It predominantly locates inside the endoplasmic reticulum (ER) with some cell surface expression in certain cancerous cells. Previous studies have shown that gp96 expression level was up-regulated in tumor cells, including hepatocellular carcinoma (HCC).

A clinicopathological study of three cases of severe acute respiratory syndrome (SARS).

Aims: The severe acute respiratory syndrome (SARS) caused a large outbreak of atypical pneumonia in Beijing, China from early March 2003. We report the pathological features from three patients who died of SARS.

Methods: Autopsies were performed on three patients who died 9-15 days after the onset of the illness, and the clinical and laboratory features reviewed.

[Liver histological changes after lamivudine treating in chronic hepatitis B patients with HBeAg positive].

Objectives: To investigate the histological changes in liver biopsy tissues taken from chronic hepatitis B patients with HBsAg and HBeAg positive and ALT abnormal after lamivudine therapy for one year.

Methods: Lamivudine was given orally at the dose of 100 mg once a day for one year. 101 patients were enrolled into this open-label study.

[Clinical characteristics and mechanism of liver injury in patients with severe acute respiratory syndrome].

Objectives: To summarize the clinical features of liver injury in patients with severe acute respiratory syndrome (SARS), providing information for further mechanism and clinical study.

Methods: The clinical and some laboratory data of 154 patients suffered from SARS were collected and analyzed, who were admitted to the isolation wards of Beijing You-an Hospital from March 11 to June 3, 2003. The serum samples were taken from 46 patients to detect IL-1beta, IL-2, IL-4, IL-6, IL-8, IL-10, TNF-alpha, endotoxin and hepatitis related viral inclusions.

[Clinical manifestation, treatment, and outcome of severe acute respiratory syndrome: analysis of 108 cases in Beijing].

Objective: To investigate the clinical manifestations, treatment, and outcome of severe acute respiratory syndrome (SARS).

Methods: The clinical data of 108 SARS in-patients were analyzed.

Results: Among the 108 cases, 35 males (32.

[Detection of hepatic progenitor cells in patients with severe hepatitis and their distribution].

Objectives: To identify hepatic progenitor cells (HPCs) in patients with severe hepatitis (SH) by detecting their markers and investigate the features of their distribution and location.

Methods: Liver tissues taken from 59 SH patients were tested for the receptor of stem cell factor (c-kit), pi-class glutathione S-transferase (GST-pi), cluster of differentiation 34 (CD34), cytokeratin 19 (CK19), cytokeratin 18 (CK18) and alpha fetoprotein (AFP) by immunohistochemistry (IHC). Meanwhile, 58 patients with acute or chronic hepatitis were also detected to act as controls.