Objective To investigate the expression and clinicopathological significance of matrix metallo-proteinase(MMP-9) and matrix metalloproteinase tissue inhibiting factor-1 (TIMP-1) in colorectal carcinomas.Methods Immunohistochemistry (PowerVision method) in the paraffin embedded tissue samples was used to deter-mine MMP-9 and TIMP-1 in 42 colorectal carcinomas and its adjacent normal colorectal mucosa.The relationship of their expression with some clinicopathological characteristics was analyzed.Results MMP-9 and TIMP-1 were both significantly overexpressed in colorectal carcinomas compared with its adjacent normal colorectal mucosa(69.1% and 61.9% vs.45.2% and 40.5% ,P =0.009 and P =0.004) ,and MMP-9 was positively associated with the re-gional lymph node metastasis,bowel wall invasion and Dukes stage(rs=0.372,P =0.015;rs =0.372,P =0.015;rs = 0.429,P = 0.005).TIMP-1 was positively associated with Dukes stage, bowel wall invasion and regional lymph node metastasis (rs = 0.394, P = 0.010;rs= 0.382,P = 0.013rs = 0.382, P = 0.013 ).There was a positive corre-lafion between the expression of MMP-9 and TIMP-1 (rs=0.641, P <0.001).Conclusion MMP-9 and TIMP-1 may play a key role in colorectal carcinogenesis.Examination of MMP-9 and TIMP-1 expression may have an impor-tant significance for evaluating prognosis, predicting of invasion and metastasis and comprehensive therapy.

[Objective]To investigate the morphological changes that take place in the subchondral cocortical bone in steroid-induced osteonecrosis and analyze the reasons leading to humeral head collapse in juvenile rabbits.[Method]Five-six month-old female rabbits were separated by two groups.A modified version of the methods was used to replicate steroid enhanced osteonecrosis anminal humeral head models with Shwartzman reaction in group A,and group B served as the single control.Each humeral head was obtained 10 weeks after the drugs injection.Subchondral cortical bone was observed,and the number of haversian canals was counted.The microcirculatory changes were also detected with scanning electron microscope.[Result]In group A,the Haversian canals in' subchondral area almost disappeared;the subchondral cortical bone disappeared with its arch,dome and bridge structures.Microcirculatory stasis happened in the subchondral vessels.Some humeral heads collapse were observed.While in group B,subchondral cortical bone is integrity and continuity,forming arch,dome and brige structures with subtrabecular bone.[Conclusion]The disappearance of the subchondral cortical bone is a major reason leading humeral head collapse,and ischemia is the critical reason of it.

Hypoxia-inducible factor-1 (HIF-1) is a key transciptional regulator of cellular and systemic oxygen homeostasis,composed of the two subunits,HIF-1α and HIF-1β.HIF-1α is an inducible subunit regulated by hypoxia,which is posttranslationally modified by various ways,including ubiquitination,phosphorylation,hydroxylation,acetylation and glycation,accordingly affecting its protein's stability,nuclear translocation and regulation of its target genes.Small ubiquitin-related modifier (SUMO) is an micromolecule protein participating in posttranslational modifications of proteins dynamicly in eukaryotic organism,which is similar in structure to ubiquitin.SUMOylation and deSUMOylation are involved in multiple regulations of biologic processes,such as signal transduction,transcriptional regulation,cell cycle processes and biological rhythm.SUMOylation is related to HIF-1α stability and transcription activity in hypoxia,providing a newthread to study self-regulation mechanism of HIF-1α for us.

Objective To detect the expression of 84 signaling molecules associated with nuclear factor-κB in lesions of Uygur patients with psoriasis.Methods Skin specimens were obtained from the lesional and paralesional skin of eight Uygur patients with psoriasis.Total RNA was extracted from the skin specimens and reversely transcribed into cDNA.PCR-array analysis was carried out to quantify the expressions of 84 signaling molecules related to nuclear factor-κB.Genes with a fold-change ＞ or =2 were defined as differentially expressed.Results Among the 84 tested genes,22 showed upregulated expression,7 downregulated expression,and the remaining 54 genes showed no significant changes in psoriatic lesions compared with the normal skin.The strongest upregulation was observed in the gene expressions of Caspase recruitment domain family 11 (CARD11) and granulocyte-macrophage colony-stimulating factor 2 (CSF2),and the most significant downregulation in the gene expression of interleukin 10 (IL-10),tumor necrosis factor superfamily member 5 (CD40) and nuclear factor of kappa light polypeptide gene enhancer in B-cell inhibitor,epsilon (NFκBIE).Conclusion Multiple molecules involved in the NF-κB signaling pathway might be activated or inhibited in lesions of patients with psoriasis.

Objective To investigate the chemical constituents of Wedelia trilobata.Methods The chemical constituents were separated by chromatography and their structures were determined by physico-chemical constants and spectral analyses.Results Eleven compounds were isolated and identified as grandiflorenic acid(1),1?-acetoxy-6?,9?-dihydroxy-4,10?-dimethyl-5?H,7?H,8?H-endesm-3-en-8,12-olide(2),1?-acetoxy-4?-hydroxy-6?-isobutyryloxy-9?-isovaleryloxyprostatolide(3),16?-hydroxy-ent-kauran-19-oic acid(4),(3R,4R,6R)-3,4-dihydroxy-1-menthene(5),trilobolide-6-O-isobutyrate(6),1?-acetoxy-4?,9?-dihydroxy-6?-isobutyroxyprostatolide(7),16?,17-dihydroxy-ent-kauran-19-oic acid(8),daucosterol(9),protocatechualdehyde(10),and caffeic acid(11).Conclusion All the compounds are isolated from W.trilobata for the first time except compounds 6 and 7.Compounds 2 and 3 are new sesquiterpene lactones,named as trilobolide A and 1?-acetoxy-4?-hydroxy-6?-isobutyryloxy-9?-isovaleryloxyprostatolide,respectively.

Objective To analyze spiral CT manifestations and the diagnostic value of pulmonary embolism (PE).Methods Spiral CT pulmonary angiography (SCTPA) and chest plain CT scan were performed in 25 cases with highly-suspected PE. CT findings were retrospectively analyzed.Results The direct signs of PE appeared as complete or partial filling defect within pulmonary arteriae on SCTPA.191 branches of pulmonary artery were involved in all cases,of them, 44 branches were centrally located(23.0%), 115 branches were eccentrically located (60.2%),7 branches were mural filling defect (3.7%), 25 branches were complete occlusion (13.1%).The indirect signs of PE included irregular consolidation (n=15), patchy ground glass opacities (n=6),local streak shadows(n=4),"mosaic"sign (n=5), pleural effusion(n=16) ,pericardial effusion (n=3)and simple emboli no other signs(n=3).Conclusion SCTPA is a fast ,effective, security and non-invasive diagnostic method for PE .

Objective To determine the content of quercetin in Semen Hoveniae.Methods A RP-HPLC method was established.The chromatographic column was Synergi 4u Fusion-RP 80.The mobile phase was acetonitrile-0.5 %phosphoric acid(33 ∶67).The flow rate was 1.0 mL?min-1,the detection wavelength was at 360 nm,and the column temperature was 30 ℃.Results The average recovery of quercetin was 98.6 %,and RSD was 2.39 %(n=6).Conclusion The method is effective,simple and accurate,and can be used to determine the content of quercetin in Semen Hoveniae.

Objective To investigate the biotransformation of furannoligularenone by cell suspension cultures of Nicotiana tabacum. Methods Furannoligularenone was added to the medium of the suspension cells of N. tabacum after precultured for 10 d, then they were co-cultured for another 4 d. The biotransformed products were detected with HPLC and isolated by various chromatographic methods. The chemical structures of biotransformed products were elucidated on the basis of their physicochemical pro-perties and spectroscopic data. Otherwise, the influence of co-cultured time on conversion ratio was investigated either. Results The substrate, furannoligularenone (Ⅰ), was successfully biotransformed by N. tabacum cultured cells. Two products, 3-oxo-eremophila-1, 7(11)-dien-12, 8-olide (Ⅱ) and 3-oxo-8-hydroxyeremophila-1, 7(11)-dien-12, 8-olide (Ⅲ) were obtained. After co-cultured for 5 d, the mole conversion ratio of the substrate reached the highest (53.1%). Conclusion It's the first report on biotransformation of furannoligularenone by N. tabacum cultured cells.

Objective Objective To investigate the clinical application of high-dose-rate(HDR)endobronchial brachytherapy for the treatment of primary lung cancer with atelectasis. Methods A total of 142 cases of lung cancer with atelectasis treated with HDR endobronchial brachytherapy and 71 cases(contr01)treated with extemal irradiation only at onr center of cancer were comparatively studied.1n the treatment group,with the aid of bmnchoscope,brachytherapy was applied 2 or 3 times at the dose of 8 Gy each time to a tissue depth of 1 to 1.5 cm.Cases in the contmlgroup,treated with external irradiation,received 60-70 Gy in total.Results Complete recruitment of atelectasis was observed in 80.28%cases of the treatment group and 64.79%in the control,T11ere Was significant difference between the two groups.Survival rates after 1,2 and 3 years in cases with complete remission of atelectasis in treatment group were 60.68%,44.44%and 23.93%,but 36.00%,28.00%and 16.00%in cases with no remission of atelectasis.Significant difference of one-year survival Was found between the two groups(P

Objective To profile the subtypes of open reading frame 75(ORF75)of human herpesvirus 8(HHV-8)in patients with Kaposi's sarcoma,and to evaluate their relationship with clinical phenotypes and invasiveness of Kaposi's sarcoma.Methods Twenty-five paraffin-embeded tissue specimens of Kaposi's sarcoma were collected in the Department of Dermatology.People's Hospiml of Xinjiang Uygur Autonomous Region.DNA was extracted from these specimens.and nested-PCR was performed to amplify HHV-8 DNA followed bv bi-directional sequencing.Phylogenetic analysis was carried out by using the software DNASTAR,Clustal W program and PHYLIP package so as to identify the ORF75 subtyoe of HHV-8.Results HHV-8 DNA was detected in 21(84%)out of the 25 samples,and 7 cases of AIDS-associated Kaposi's sarcoma were all positive for HHV-8.Among the 21 patients carrying HHV-8 DNA,18 were positive for subtype A ORF75.3 for subtype C ORF75.The ORF75 subtypes had no significant correlation with the presence of mucosal lesions or clinical phenotypes of Kaposi's sarcoma.Conclusions The majority of patients with Kaposi's sarcoma in Xinjiang are infected with HHV-8 of ORF 75 subtype A and C.The ORF75 subtypes of HHV-8 have no correlation with the presence of mucosal lesions or clinical phenotypes of Kaposi's sarcoma.