Objective Hyalinizing trabecular tumor ( HTT) is often mistaken as thyroid papillary carcino-ma( TPC) ,which shares some morphological features with TPC .The aim of this study is to investigate HTT and TPC with immunohistochemical methods .Methods we detected the expression of the three Immunohistochemical index((CK19,HBME-1,MIB-1)in thirteen cases HTT and twenty cases TPC.Results In HTT samples, CK19:three of the thirteen were positive and focal positivity (1+);HBME-1:None of the thirteen samples was stained.MIB-1:ten in thirteen cases were stained in nucleus .In TPC samples,CK19:all of the twenty samples were intensely stained;HBME-1:nineteen of twenty samples were intensely stained;MIB-1:all of the twenty samples were stained in nucleus .The sensitivity and specific degrees of CK 19 and HBME-1 combination to diag-nosis HTT and TPC were 90.0%and 69.2%.Conclusion Our research could provide potent aid to differential diagnosis of HTT and TPC .The combination of CK19 and HBME-1 are adequate to identify HTT and TPC .

Objective To explore the level of the oxidative stress and the DNA oxidative damage of peripheral blood mononuclear cells (PBMCs) in pulmonary embolism (PE) patients after remission and in acute exacerbation.Methods The PBMCs DNA damage in 35 PE patients (test group) after remission and in acute exacerbation respectively and in 33 healthy persons (control group) was detected by single-cell gel electrophoresissingle (Comet assay).The total antioxidative capacity (TAC) in blood plasma was measured by phenanthroline colorimetric analysis.The contents of malondialdehyde (MDA) in blood plasma was measured by thiobarbituricacid colorimetric analysis.The capacity of glutathion peroxidase (GSH-PX) in blood plasma was measured by the method of improved Hafeman direct determination method (DNTB).Results The level of TAC,GSH-PX in test group after remission were significantly higher than those in acute exacerbation[(6.86 ± 1.21) kU/L vs.(5.18 ± 1.13) kU/L,(165.25 ± 41.96) kU/L vs.(137.23 ± 38.52) kU/L] (P ＜0.01),and they were all significantly lower than those in control group [(7.85 ± 1.44),(189.92 ± 51.32) kU/L] (P ＜ 0.01).The level of MDA in test group after remission was significantly lower than that in acute exacerbation [(5.58 ± 1.89) μmol/L vs.(7.26 ± 2.25) μmol/L] (P ＜ 0.01),and they were significantly higher than that in control group [(3.71 ± 1.52) μmol/L] (P ＜ 0.01).The arbitrary units (AU) of PBMCs DNA damage in PE patients after remission (29.01 ± 6.75) was significantly lower than that in acute exacerbation (42.13 ± 8.01),and they were all significantly higher than that in control group (15.12 ± 4.36),there were significant differences (P＜ 0.01).There were negative correlations between the PBMCs DNA damage and the level of TAC in PE patients after remission and in acute exacerbation (r =-0.695,P ＜ 0.01 ;r =-0.536,P ＜ 0.01).There were positive correlations between the PBMCs DNA damage and the contents of MDA in PE patients after remission and in acute exacerbation (r =0.513,P ＜ 0.01 ;r =0.628,P ＜ 0.01).There were negative correlations between the level of TAC and the contents of MDA in PE after remission and in acute exacerbation respectively (r =-0.534,P ＜ 0.01 ;r =-0.486,P ＜ 0.05).There were positive correlation between the level of TAC and GSH-PX in PE patients after remission and in acute exacerbation (r =0.512,P ＜ 0.01 ;r =0.497,P ＜ 0.01).Conclusions There are oxidation/antioxidation imbalance,oxidative stress and the PBMCs DNA damage in PE patients.There is positive correlation between the PBMCs DNA damage and the oxidative stress.After remission,the level of the oxidative stress and the PBMCs DNA oxidative damage in the same PE patients is improved respectively.

Objective To investigate renal histopathological changes and cli ni cal characteristics in 20 women with preeclamptic nephropathy or gestational pro teinuria.Methods Between 1999 and 2002, 20 women who suffered from preeclampsia or proteinuria during pregnancy underwent postpartum renal biopsies from fifth d ay to third month after delivery. One woman repeated her renal biopsy half year later. Each biopsy specimen was divided into three parts,and processed and stain ed for conventional light microscopy(LM), immunohistology (IH) and electron micr oscopy (EM) examination. The clinicopathological data were studied and women wer e followed up after discharge for a long time. Results Sixteen of 20 women were diagnosed as preeclampsia, whose altered glomeruli demonstrated a typical endoth elial lesion (endotheliosis), and mild to moderate proliferation of mesangial ce lls. IH revealed either negative or mild IgG、IgM and C3 deposits. Focal glomeru losclerosis (FGS) was observed in one of 16 cases, whose microproteinuria (0 49 g/24 h) lasted for more than one year, meanwhile the proteinuria of other 15 wo men disappeared completely within 3～6 months after delivery. Besides, one was I gA nephropathy (IgAN) complicated preeclamptic nephropathy, whose proteinuria de creased obviously after delivery, but remained microhematuria, and endothelial l esion disappeared in repeat biopsy after half year. One was IgAN and received a treatment of adrenocorticosteroid and immunosupressive agents because of macropr oteinuria. One was mild mesangial proliferative glomerulonephritis presenting co nstant microhematuria and microproteinuria. One was typeⅠmembranous nephropathy , whose proteinuria decreased remarkably after delivery as well. Conclusions Ren al histopathological changes of preeclampsis are typical endothelial lesion, and often recover completely within 6 months after delivery. Recovery may be delaye d in the case of FGS accompanied. Pregnancy may aggravate primary renal damage w hich will be improved after delivery. Postpartum renal biopsy is safe and benefi cial to early diagnosis, treatment and prognosis.

Seven-year-program medical education is an important model to train high-level medical person.Through the change of the teaching concept in medicine cytobiology experiment,re-form of the teaching content,and the use of a variety of effective teaching methods,students’com-prehensive quality,innovative thinking and practical ability is improved,which can meet the needs of modern medical education.

By participating in the research practice of basic medicine,the innovative consciousness,the scientific thinking and researching ability of seven-year program medical students can be improved. Meanwhile,the generalization of Open Experimental Teaching and further development of self-design experiment also improve the innovation and research ability of medical students,which can serve as a new approach to the quality education of higher medical talents.

The incidence of pancreatic cancer is increasing year by year, but the clinical diagnosis and treatment progress is limited and the prognosis is poor. Tumor microenvironment (TME) is closely related to the invasion, metastasis and chemotherapy resistance of pancreatic cancer. Cancer-associated fibroblasts (CAFs) are fibroblasts in a state of continuous activation, which are the most prominent components in TME. CAFs can promote the malignant biological behavior of pancreatic cancer through a variety of molecule-mediated mechanisms. Moreover, several attempts targeting CAFs for the treatment of pancreatic cancer have been largely unsuccessful. It may be related to the heterogeneity of CAFs in pancreatic cancer. Therefore, in-depth study of its heterogeneity and accurate targeting of some specific phenotypes and functional CAFs subtypes in the matrix on this basis may be more promising in the clinical treatment of pancreatic cancer.

ObjectivesTo study the expression of lipoxygenase-12 (12-LOX) in human pancreatic adenocarcinoma and its relationship with the clinicopathological parameters.MethodsExpression of 12-LOX in pancreatic carcinoma tissue,pancreatic cancer cell lines SW1990 and PANC1,and adjacent normal pancreatic tissue was detected by using immunohistochemistry,RT-PCR,and Western blot,respectively.The relationship between 12-LOX expression and clinicopathological parameters was analyzed.ResultsExpression of 12-LOX was negative in 8 cases,weak positive in 7 cases and strong positive in 15 cases of pancreatic carcinoma.The overall positive rate in pancreatic carcinoma was 73.3％.The expressions of 12-LOX mRNA and protein were positive in pancreatic cancer cell lines SW1990 and PANC1,and negative in adjacent normal pancreatic tissue.The strong positive expression of 12-LOX in pancreatic cancer was associated with TNM stage,pathological grade,lymph node metastasis (P ＜ 0.05 ).ConclusionsThe expression of 12-LOX was up-regulated in pancreatic cancer and is correlated well to malignant behaviors of tumor.

Objective This study explored the expression of polyclonal protein SUZ12 in patients with intrahepatic cholangiocarcinoma(ICC),and its role in predicting the survival and treatment of ICC patients.Methods The expression of SUZ12 and p16INK4a was detected by immunohistochemical assay in 207 liver tissue samples including ICC patients,BilIN-1,-2,-3 and non-tumor-like cholangiocarcinoma.The expression of these proteins was assessed to be related to the pathological characteristics of the ICC patients receiving chemotherapy and the outcome of survival as well as the subsequent chemotherapy response.Results The expression level of SUZ12 was gradually increased from non-neoplastic bile duct tissue to BilIN-1,-2,-3 and ICC.The expression of p16INK4a protein was expressed in non-neoplastic-like cholangiocarcinoma,but it decreased gradually in BilIN-1,-2,-3 and ICC tissues.SUZ12 expression was associated with undifferentiated ICC,lymph node metastasis and advanced cancer.Kaplan-Meier curve analysis showed that ICC patients with high expression of SUZ12 had a significant reduction in overall survival and disease-free survival in comparison with ICC patients with the low expression of SUZ12.SUZ12 expression was significantly associated with overall survival of patients receiving adjuvant gemcitabine-based chemotherapy(AGC).Conclusion SUZ12 expression is able to predict the overall survival and disease-free survival of ICC patients with adjuvant gemcitabine-based chemotherapy.

Objective To discuss the clinical presentations and imaging features of a novel avianorigin influenza (H7N9).Methods Anteroposterior chest radiographs and serial thin-section CT images in 5 patients with H7N9 were reviewed retrospectively by two radiologists,the predominant inaging patterns of lung abnormalities and clinical data were recorded and analyzed.Results The large consolidation of the right lung with air bronchograms was the most common radiographic appearance in all patients with H7N9 at admission,and the abnormalities were more severe in the bilateral lower lobes.Both lungs developed large,scattered consolidations and ground-glass opacities with the progression of disease.The lesions in the left lung were more rapidly absorbed than those in the right lung.Conclusion Influenza H7N9 has certain chest imaging characteristics in the onset,progression and recovery of disease.

BACKGROUND:Recent studies found that some factors play important role in the process of denervated muscle atrophy, especial y the feak-headbox transcription factor, is the key element to regulate the denervated muscle atrophy.
OBJECTIVE:To investigate the effect of RNA interference on inhibiting feak-headbox 3a gene expression in vitro.
METHODS:The myoblast cel line L6 were cultured in the 6-wel cel culture plates, then pEGFP-N1 and smal
interfering RNA recombinant plasmid with the same ratio was transfected under the Lipofectamine2000 mediation to optimize the transfection efficiency of the detection system;2μg smal interfering RNA recombinant plasmid of feak-headbox 3a gene were transfected with myoblast cel line L6 for 48 and 72 hours.
RESULTS AND CONCLUSION:At 48 hours after pEGFP-N1 and siRNA recombinant plasmid transfection, a large number of bright green fluorescent displayed under fluorescence microscope with higher transfection efficiency. Real-time quantitative PCR analysis showed that there were significant differences in the sequences of feak-headbox 3a-Ⅰ, feak-headbox 3a-Ⅱ, feak-headbox 3a-Ⅲ, feak-headbox 3a-Ⅳ on feak-headbox 3a mRNA when compared with the control group at 48 and 72 hours after trasfection (P<0.05), and the inhibition effect was more significant at 72
hours after transfection when compared with that at 48 hours after transfection. Western Blot gray analysis showed that there were significant differences in sequences of feak-headbox 3a-Ⅰ, feak-headbox 3a-Ⅱ, feak-headbox 3a-Ⅲ,
feak-headbox 3a-Ⅳ on feak-headbox 3a mRNA when compared with the control group at 48 and 72 hours after
trasfection (P<0.05), and the inhibition effect was more significant at 72 hours after transfection when compared with that at 48 hours after transfection, which was same with the effect on mRNA level. RNA interference in vitro can
significantly inhibit the fork-head transcription factor feak-headbox 3a gene expression, and the inhibition effect of feak-headbox 3a gene smal interfering RNA recombinant plasmid transfected with the sequence on the mRNA and protein level of feak-headbox 3a is not clear, which can provide new idea for the gene therapy of RNA mediated denervated skeletal muscle atrophy.