Objective: Surfactant protein A (SP-A) is protein that appears to play an important role in mammalian first-line host defense. The objective of this study was to immunolocalize SP-A in human sinonasal tissue. Method:Eleven cases of allergic rhinitis, fifteen cases of polyp and seven cases of normal middle turbinate were studied with immunohistochemistry and immunofluorescence method to detect the expression of SP-A. Result:The expression of SP-A in allergic rhinitis and polyp were dramatically higher than that in controls(P<0.05), and there was no remarkable difference in the expression of SP-A between allergic rhinitis and polyp(P>0.05). The result demonstrated that SP-A was positivly correlated with eosinophils within the basement membrane of epitheli-um(R=0.81,0.55). In the result of immunofluorescence, there was significantly higher expression SP-A in nasal mucosa of allergic rhinitis and nasal polyp than that in control group(P<0.05). Conclusion:SP-A is likely to play key roles in the inflammatory reaction process of allergic rhinitis and polyp. Its secretion in the upper airway indicates that future studies may allow manipulation of this protein and development of novel treatments for sinonasal pathology.

OBJECTIVE To study the significance by analyzing the expression of human protection of telomeres1(POT1)and telomeric repeatbinding factor-2(TRF2)in the tissues of laryngneal squamous cell carcinoma(LSCC)and in polyp of vocal cord tissues. METHODS The expression of POT1 and TRF2 in 20 tumor samples and 19 polyp of vocal cord were determined by the indirect immunofluorescence method. The results were scored and analyzed statistically. RESULTS The positive expression rates of POT1 and TRF2 in tumor samples was 65.00% and 70.00% respectively. There were no positive expression of POT1 and TRF2 in polyp of vocal cord. The positive expression of POT1 was higher in poorly differentiated laryngeal carcinoma than that in well-differentiated and moderately differentiated laryngeal carcinoma(Chi-square test with contingency table, P0.05). CONCLUSION The expression of POT1 and TRF2 in laryngneal squamous cell carcinoma were remarkable, POT1 and TRF2 may play a critical role in tumorigenesis of laryngneal squamous cell carcinoma. There was statistical significant difference for degrees of POT1 expression in different tumor histological grades.

Objective To explore the value of Toll-like receptor 2(TLR2) on the diagnosis of neonatal septicemia especially for the early diagnosis.Methods Twenty-two newborns with septicemia were divided into 2 groups according to the time of onset:early-onset group(n=12) and late-onset group(n=10).Another 14 non-infectious newborns were collected as control group.The TLR2 mRNA in peripheral blood was detected by real-time polymerase chain reaction,and mononuclear cells were isolated by the density gradient centrifuga-tion;the C reaction protein(CRP) was detected,and the co-relationship of the indexes was analyzed by Pearson correlation analysis.Results 1.The level of CRP in early-onset group were(157.89?32.96) ng?L-1,and(89.78?16.24) ng?L-1 in late-onset group,and there was significant difference between both groups(P=0.001);(6.91?1.20) ng?L-1 in control group,which was significantly lower than that in early-onset group and late-onset group(P=0.000,0.001).2.The expression of TLR2 mRNA in early-onset group and late-onset group was(57.38?10.72)?1012 copies?L-1and(32.74?4.65) ?1012 copies?L-1,which was significantly higher than that in control group[(4.12?0.68) ?1012 copies?L-1].3.CRP is positively correlated with TLR2 mRNA(C=0.972,P=0.000).Conclusions TLR2 expression is proven to be related to both the level of CRP and the stage of onset and may play a key role in the pathogenesis of neonatal septicemia.Detection for TLR2 may assist the earlier diagnose of atypical neonatal septicemia.

Objective To evaluate the therapeutic effect of recombinant adeno-associated viral vector (rAAV) expressing human tissue kallikrein gene (rAAV-HK) on insulin resistance and renal complications in tyDe2 diabetic rats. Methods Male Wistar rats were injected low dose streptozotocin and fed with high fat and sucrose diets to form type 2 diabetic model. rAAV mediated HK gene (HK group) or LacZ gene (LacZ group) were introduced to the diabetic rats, and their systolic blood pressure, fasting blood glucose and insulin, serum creatinine, urine creatinine, urine osmolarity and urine microalbumin were measured. The homeostasis model assessment of insulin resistance (HOMA-IR), urinary albumin excretion rate (UAER) and creatinine clearance rate (Ccr) were calculated. The expression of PI3-kinase p11o catalytic subunit (p110) and Akt phosphorylation on Thr-308 were detected by Western blot. The morphology of kidney wag observed. Results Delivery of rAAVHK resulted in a reduction in blood pressure at 2 weeks and the hypotensive effect lasted for the duration of the study. The HOMA-IR was significantly lower in HK group than LacZ group (4.76±0.33 vs 8.36±0.48, P<0.01) at the end of the study, fasting insulin level was reduced [(8.19±2.45 vs 13.85±3.76)mIU/L. P<0.01], but there was no significant change in fasting blood glucose [(13.09±3.01 vs 13.58±2.88)mmol/L].The phosphorylation of p11o and Akt Thr-308 were significantly decreased in skeletal muscle and liver in LacZ group and were almost corrected by HK gene therapy. The UAER and Ccr were significantly lower and urinary osmolarity were higher in HK-treated rats compared with LaeZ rats. Histological assessment indicated that the renal complication was relieved by HK gene delivery. Conclusion The rAAV-mediated HK gene delivery efficiently attenuated insulin resistance partly through PI3K/Akt pathway and diabetic nephropathy in type 2diabetic rats.

Objective To explore the effect of erythropoietin(EPO) on apoptosis of human renal tubular(HK-2) cells induced by postasphyxial-serum of neonates.Methods HK-2 cells were used as target cells.The experiment was divided into 4 groups,control group(n=8):HK-2 cells were maintained in standard medium;asphyxia group(n=8):HK-2 cells were treated with serum obtained from neonates with asphyxia.Each culture medium replaced with 200 mL/L suffocation DMEM/F12 serum culture medium;EPO pretreatment group(n=8):HK-2 cells were pretreated 24 h with serum contains 5?104 IU/L EPO,and then deal as asphyxia group;EPO and 5-hydroxydecanoic acid sodium salt(5-HD) pretreatment group(n=8): HK-2 cells were pretreated 24 h with serum contains 5?104 IU/L EPO and 500 ?mol/L 5-HD,and then deal as asphyxia group.All cells were cultured at 37 ℃ in humidified atmosphere with 50 mL/L CO2 for 24 h.The apoptosis rate of HK-2 cells was detected by flow cytometer.The expressions of Caspase-3 and X-linked inlnibitor of apoptosis protein(XIAP) of HK-2 cells were detected by using immunohistochemical method.Results Compared with control group,after stimulated with postasphyxial-serum,the apoptosis rate and the expression of Caspase-3 of HK-2 cells were significantly increased(Pa

Objective To preliminarily screen the neoplastic stem cell (NSC) related surface markers combination and to under-stand the NSC distribution in hepatoblastoma(HB) .Methods The children cases of HB undergone the surgical therapy in the Jian-gxi Provincial Children′s Hospital were selected .The immunohistochemical method was adopted for observing the expression and distribution of NSC-related markers CD34 ,Thy-1 ,c-kit ,CD56 and stem cell factor(SCF) in the HB tissue and the normal hepatic tissue away from the edge of tumor tissue 3cm outside .Results Thy-1 and c-kit were sporadically distributed in the HB tissue and mainly focued on the portal area ,but did not exressed in the normal liver tissue ;the expression of CD34 and SCF in HB was signifi-cantly higher than that in the normal liver tissue(P<0 .05) ,in which CD34 was mainly distributed in the endothelial system and SCF was mainly expressed in the portal area ;CD56 was expressed in the tissue of the clustered nerve fibers ,the expression differ-ence between them had no statistical significance (P>0 .05) .Conclusion The different NSC related surface markers are distributed in the HB tissue and focus on the specific areas .The positive cells of Thy-1/c-kit expression may play a role in the HB occurrence .

Objective To investigate the effects of angelica solution on chronic hypoxic pulmonary hypertension in rats.Methods Thirty SD rats were randomized into normoxic group,hypoxic group and angelica solution-protected group.The model of rat chronic hypoxic pulmonary hypertension was made by method of isobaric hypoxia.Angelica solution were injected before hypoxia,while the other two groups were injected normal saline.After 28d of hypoxia,pulmonary artery pressure were measured.Expressions of proliferating cell nuclear antigen (PCNA) and inducible nitric oxide synthase (iNOS) in pulmonary artery were detected by immunohistochemical staining.The index of wall thickness of rat pulmonary arteriole-percentage of the wall area in the total vascular area(wA%) were measured by a computerized image analyzer.Results The mean pulmonary artery pressure (mPAP) of normoxic group,hypoxic group and angelica solution-protected group were10.50±1.90,35.36±9.11,18.32±2.30 (mm Hg);wA% of the three groups were 52.71±5.16,82.38±8.43,64.58±9.54 (%),mPAP and wA% were significantly higher in the hypoxic group than those in the normoxic group (P<0.01) and angelica solution-protected group (P<0.01).PCNA expression of normoxic group,hypoxic group and angelica solution-protected group were 3.15±1.10,24.50±5.72,12.67±3.46 (%).The PCNA expression in the pulmonary artery was significantly higher in the hypoxic group than those in the normoxic group (P<0.01) and in the angelica solution-protected group (P<0.01).iNOS expression of normoxic group,hypoxic group and angelica solution-protected group were 2.13±1.01,17.33±3.53,37.50±7.04 (%).iNOS expression in the pulmonary artery was higher in the hypoxic group than those in normoxic group (P<0.01),and angelica significantly increased iNOS expression in comparison with the normoxic and hypoxic groups (P<0.01).Conclusion Angelica solution alleviates chronically hypoxia induced pulmonary hypertension in rats by inhibiting the espression of PCNA in pulmonary artery and up-regulating the expression of iNOS.

Objective To investigate the possibility of chloroquine radiosensitization of esophageal cancer cell line TE-1 and its further mechanism.Methods Effect of chloroquine on cell viability of TE-1 cells was determined by MTT method.Expression of LC3,Beclin-1 and formation of acidic vesicular organelles (AVOs) were determined by Western blot,and fluorescence staining with Lyso-Tracker Red DND-99,respectively.Clonogenic survival of TE-1 cells was examined by clonogenic forming assay.Results Chloroquine showed dose-dependent inhibition of TE-1 cell growth,and its values of IC50 and IC10 were (72.33 ± 5.28) and (15.42 ± 3.33) μmol/L,respectively.The expression of Beclin-1 and LC3-Ⅱ/Ⅰ markedly increased in irradiated TE-1 cells.The addition of chloroquine with IC10concentration significantly reduced the fluorescence and intensity of AVOs accumulation in the cytoplasm of TE-1 cells.Clonogenic survival fraction decreased obviously,in TE-1 cells with addition of chloroquine after radiation and the value of SERD0 was 1.439.Conclusions Chloroquine could radiosensitize esophageal cancer cells by blocking autophagy-lysosomal pathway and be used as a potential radiosensitizing strategy.

Objective To explore the peripheral blood T lymphocytes cell level in different grades of cerebral gliomas pa-tients at the time of before and after operation and its clinical significance .Methods A total of 80 cases of brain tumor patients from February 2010 to February 2012 in this hospital were chosed as study objects ,included 57 cases of glioma ,23 cases of other brain tumors ;57 cases of glioma were divided into 19 cases of low grade group and 38 cases of high grade group accorded to WHO grading standards ,and 50 cases of healthy people in same period were selected as control group .Venous blood in three groups were extracted at 1st day and 1st week after operation ,to detected the level of T lymphocyte subsets in peripheral blood and analyze the relationship between the different grade gliomas and prognosis .Results The peripheral blood CD3 + ,CD4 + ,CD4 + /CD8 + in control group were significantly higher than that of other brain tumor group and the glioma group ,CD8 + was significantly lower than that of the two groups(P< 0 .05) .Compared with other tumor group ,peripheral blood CD3 + ,CD4 + ,CD4 + /CD8 + in glioma group de-creased significantly ,CD8 + increased significantly(P< 0 .05) ;before and after the operation ,the CD3 + and CD4 + /CD8 + levels were significantly higher in low grade group than in the high grade group ,CD8 + was significantly lower in low grade group than in the high grade group(P< 0 .05) ,at the time of 1st week after operation ,CD3 + and CD4 + /CD8 + increased ,CD8 + decreased significant-ly of two groups when intra-group comparison (P < 0 .05) .The median survival time were 31 months in low grade group and 13 months in high grade group ,and the singnificance was found in two groups(P< 0 .05) .The median survival time were 34 months in CD4 + /CD8 + > 1 group and 17 months in CD4 + /CD8 + < 1 group ,the singnificance was found in two groups(P< 0 .05) .Conclusion The immune function of patients with brain glioma is inhibited ,the higher the malignancy of the tumor ,the more obvious of im-mune inhibition ;T lymphocyte subsets level could be used as evaluating index of malignant degree and prognosis of brain glioma .

Objective To explore the expression and regulatory mechanism of hypoxia inducible factor-1?(HIF-1?)during fracture healing. Methods Mouse models of tibia fracture healing were established,and callus samples were collected 1,3,7,14,21 and 28 days after fracture.The development of callus and new bone formation were evaluated with roentgenology,Micro-CT and tetracycline double labeling method,and the expression of HIF-1?,vascular endothelial growth factor(VEGF),Runx2 and ALP in callus were detected with RT-PCR,Western blotting and immunohistochemistry.The relationship between HIF-1? and fracture healing was analysed. Results The expression of HIF-1? was detected in cells in the fracture sites as well as in evolved osteoblasts,chondrocytes and osteocytes in early callus under hypoxia.The highest expression rate of HIF-1? achieved on the 7th day after fracture,lasted for about 7 days,then decreased gradually,and returned to intact level on the 28th day after fracture.The expression tendency of VEGF resembled that of HIF-1?.Bone formation activity was more active in early callus,and the callus volume peaked on the 14th day after fracture and decreased gradually.The mineralization of callus mainly took place in the late healing period(14th to 28th day after fracture).Conclusion Cells involved in fracture healing are hypoxia-responsive cells,which express HIF-1?.HIF-1? can regulate cell state and function,and can promote angiogenesis so as to play a crucial role in fracture healing.