Objective-To-discuss-the-clinical-efficacy-of-limited-decompression-and-pedicle-screw-fixation-for-thoracolumbar-burst-fractures.-Methods-From-October-2005-to-October-2011,-38-patients-with-thoracolumbar-burst-fractures-were-treated-by-lumbar-pedicle-screw-fixation-combined-with-limited-decompression-.The-X-ray-measurements-and-evaluations-of-neurological-functions-before-and-after-surgery-were-reviewed-.-Results-All-the-38-cases-were-followed-up-for-36-months.The-bone-fusion-was-obtained-in-all-the-cases-,-without-pedicle-screw-breakage-,-bending-,-or-prolapse-.Evaluation-of-the-efficacy-at-36-months-after-surgery:excellent-in-36-cases,-good-in-1-case,-and-poor-in-1,-with-a-good-or-excellent-rate-of-97.4%-(37/38).The-preoperative-anterior-height-of-fractured-vertebrae-was-(14.23-±2.51)-mm,-which-was-significantly-lower-than-that-6-months-postoperatively-[(25.68-±3.95)-mm,-q=22.319,-P<0.05],-24-months-postoperatively-[(26.23-±3.15)-mm,-q=23.391,-P<0.05],-and-36-months-postoperatively-[(25.64-±2.86)-mm,-q=22.241,-P<0.05].The-preoperative-Cobb-angle-was-(24.39°±2.54°),-which-was-significantly-more-than-that-36-months-after-surgery[(15.54°±1.05°),-q=27.448,-P<0.05].The-preoperative-VAS-scores-were-(6.1-±1.1)-points,-which-were-significantly-higher-than-that-36-months-after-operation-[(1.2-±0.6)-points,-q=33.930,-P<0.05].There-were-significant-differences-in-the-Frankel-grades-before-and-after-the-operation-(Z-=-2.190,-P-=0.029).-Conclusion-Limited-decompression-and-pedicle-screw-fixation-for-thoracolumbar-burst-fractures-can-not-only-provide-instant-stability-,-but-also-have-advantages-of-high-satisfaction-rate-,-minimal-invasion-,-and-long-term-prevention-of-kyphosis-and-fixation-failure-.

Objective To evaluate the diagnostic value in pulmonary interstitial fibrosis by transbronchial lung biopsy(TBLB) and immunohistochemistry. Methods The lung tissue samples were obtained from 20 cases of pulmonary fibrosis due to different causes, including 9 cases of idiopathic pulmonary fibrosis(IPF) and 11 cases of pulmonary fibrosis caused by chronic obstructive pulmonary disease (PF COPD), by means of transbronchial lung biopsy. Hematoxylin and eosin staining, Masson trichrome staining and immunostaining with anti type Ⅲ collagen and anti type I collagen multiclonal antibodies were performed. Differences in clinical characteristics, pathological manifestations, levels, types and distribution of proliferation of collagen fibers between IPF and PF COPD were compared. Results The proliferation of collageneous fibers was significantly higher in IPF than in PF COPD( P

Objective To investigate the safety and short-term clinical outcomes of percutaneous targeted positioning bone cement augmentation treatment for osteoporotic compression fracture nonunion. Methods A total of 32 cases of osteoporotic vertebral compression fracture nonunion, with clinical course of more than 6 months between September 2009 and September 2012 were selected. Under local anesthesia and radiological monitoring, targeted positioning puncture was carried out to inject bone cement to strengthen the lesions of nonunion. Visual analogue scale (VAS), activities of daily living (ADL) and radiographic results were compared among preoperative 1 day and postoperative 1 day, 3 months, 6 months, and 12 months. Results The operation was successfully completed in 34 vertebrae of the 32 cases. Postoperative radiographic observation found no cement leakage. As compared to preoperative level, the VAS scores significantly deceased at postoperative 1 day, 3 months, 6 months, and 12 months (P<0. 05), with significant decrease from postoperative 3 months to 12 months (P<0. 05). At postoperative 3 months, 6 months, and 12 months, the ADL scores significantly increased as compared to preoperation (P <0. 05). No significant differences were seen in vertebral anterior and middle height between the preoperation and postoperation (P>0. 05). Conclusion Percutaneous targeted positioning bone cement augmentation treatment for osteoporotic compression fracture nonunion is safe and effective.

As a foreign body, intravascular stent will induce platelet aggregation on the stent surface and activate platelet system and coagulation system, resulting in thrombosis. Smooth muscle cells migrate to injured site and proliferate, leading to intimal hyperplasia and vessel wall remodeling, which induces restenosis. Incidence of intravascular restenosis is determined by stent type, disease of the host, severity of stenosis before implantation and remnant stenosis length following stenting. Inhibition of intimal hyperplasia or improvement of intima formation and vessel wall remodeling can effectively prevent restenosis. Currently, there are many drugs to prevent restenosis, including antiplatelet drug, anti-inflammatory growth factor inhibitor and anti-cell proliferation drugs.

Objective To investigate whether pulsed ultrasound-mediated microbubbles destruction could effectively enhance the efficiency of liposome delivery plasmid to hepatoma cells.Methods The cultured HepG2 cells were divided into six groups.The first group was as contrast group and the second group was given proper dose of liposome and plasmid.Pulsed-ultrasound exposed liposome was the third group.Add plasmid and microbubbles to the fourth group and exposed to pulsed-ultrasound.Add plasmid and liposome to the fifth group and exposed to pulsed-ultrasound,too.Liposome with plasmid and microbubbles were applied to the sixth group and exposed to ultrasound.After 24 hours,the EGFP expression in the hepatoma cells was detected by fluorescence microscopy and MTT.Results Green fluorescence intensity and transfection efficiency of the fifth group were higher than that of other groups,and cell viability had no significant difference.Although they were high in the sixth group,cells were partly died.Conclusions The liposome delivered EGFP expression efficiency in hepatoma cells was increased with the administration of pulsed ultrasound-mediated microbubbles destruction.In certain condition,microbubbles can enhance the efficiency of plasmid.

ObjectiveTo investigate the role and mechanism of microRNA-21 (miR-21) in the proliferation and apoptosis of ovarian epithelial carcinoma cells. MethodsA short-hairpin RNA specifically targeting miR-21 plasmid was constructed, and the recombinant was identified by restriction endonuclease analysis and DNA sequencing. Three experimental groups were included, transfection group (transfected with pSIREN-miR-21 ), negative control group ( transfected with pSIREN-miR-21-neg) and blank control group (without transfection plasmid ). The expression of miR-21 was detected by stem-loop real-time reverse transcription (RT)-PCR in OVCAR3 cells ,and western blot was used to detect the expression of programmed cell death 4 ( PDCD4 ) protein. Tethyl thiazolyl tetrazolium (MTT) and flow cytometry method were used respectively. ResultsRecombinant plasmid (pSIREN-miR-21) was constructed successfully and identified by restriction endonuclease analysis and DNA sequencing. The relative expression level of miR-21 in cells transfection, negative control and blank control group was 0.26 ± 0.08, 1.26 ± 0.21and 1.00 respectively. The level of miR-21 in the cells in transfection group was significantly lower than those in the negtive control and blank control group(P ＜0. 01 ). The gray scale of PDCD4. protein was 1443 ±33,858 ± 19 and 846 ± 16 in the transfection group, negative control and blank control group respectively. The value of PDCD4 in transfection group was higher than other control groups, and there were significantly difference among them( P ＜0. 01 ). Moreover, the optical density of the cells in transfection group was 0. 661 ±0. 015,significantly lower than those in two control groups (0. 848 ± 0. 150 for negative control, 0. 935 ± 0. 133 for blank control,P ＜ 0. 01 ). Forty-eight hours after tranfection, the rate of viable apoptotic cell was significantly higher than negative control and blank control group [(25.821 ± 0. 763 )％ vs.(0. 010 ± 0. 003 ) ％ vs. (0. 238 ± 0. 023) ％ ; P ＜ 0. 01];72 hours after tranfection, the rates of viable apoptotic cell and necrotic cell were all higher than the two control groups [the rate of viable apoptotic cell was ( 30. 480 ±0. 821 ) ％, ( 7. 792 ± 0. 312 ) ％ and ( 7. 033 ± 0. 257 ) ％ respectively ( P ＜ 0. 01 ) ; the rate of necrotic cell was (3.558 ±0.211)％, (1.557 ±0.067)％ and (1.049 ±0.028)％, respectively (P＜0. 01)].ConclusionmiR-21 might play an important role in the proliferation and apoptosis of ovarian epithelial carcinoma cells through negatively control the expression of PDCD4.

BACKGROUND:When the intervertebral disc is under stress, the hydraulic pressure generated inside the nucleus pulposus makes the annulus fibrosus extend outward and expand, and the annulus colagen fibers are stretched so that the extracelular matrix of annulus fibrosus cels is also under the pressure. In the intervertebral disc, aggrecan is the main component of proteoglycans, matrix metaloproteinase-2 is a major enzyme for extracelular matrix degradation, and tissue inhibitor of metaloproteinase is a multifunctional specific inhibition factor for matrix metaloproteinase activity. There is a mutual regulation between the latter two to keep the homeostasis between them.
OBJECTIVE: To investigate the mechanism of cyclic tensile strain in the metabolism of intervertebral disc annulus matrix.
METHODS:Rat anulus fibrosus cels were subjected to 2% or 10% cyclic tensile strain at 1.0 Hz for 2 and 12 hours using Flexcel4000 tension system. Then cels were colected and cultured in conditioned medium for gene and protein detection. Real-time quantitative PCR was used to detect mRNA expression of aggrecan, matrix metaloproteinases-2 and tissue inhibitor of metaloproteinase-2. Gelatin zymography was used to detect matrix metaloproteinases-2 activity.
RESULTS AND CONCLUSION:The use of 2% cyclic tensile strain had no obvious effect on the stress fiber of actin cytoskeleton, whereas actin cytoskeleton was depolymerized in response to 10% cyclic tensile strain. The 2% cyclic tensile strain raised the expression of Aggrecan at 12 hours; whereas raised the matrix metaloproteinases-2 and tissue inhibitor of metaloproteinase-2 at 2 hours, both of which were in homeostasis; matrix metaloproteinases-2 activity had no significant changes. 10% cyclic tensile strain had no effect on the mRNA expression of Aggrecan. No matter stretching 2 or 12 hours, the matrix metaloproteinases-2 was up-regulated, and the tissue inhibitor of metaloproteinase-2 was down-regulated, both of which were not in balance. Moreover, the matrix metaloproteinases-2 activity was not significantly changed. These findings indicate that the mRNA expressions of Aggrecan, matrix metaloproteinases-2 and tissue inhibitor of metaloproteinase-2 alter in response to cyclic tensile strain in rat anulus fibrosus cels, and the tensile strain induces different mechano-responses in the actin cytoskeleton.

Objective To investigate the bacteria distribution and drug resistance of lower respairory tract infection of re‐spairtory wards .Methods Sputum from patients with low respiratory tract infection was collected ,K‐B methods and minimun in‐hibitory concentration were used to make distribution and antibiotic resisitance .Results Five hundred and twenty‐nine strains were isolated ,of which gram negative organisms accounted for 416(78 .8% ) ,and gram positive organisms accounted for 88(16 .6% ) ,and fungi accounted for 25(4 .7% ) .In whtich ,the pseudomoas aeruginosa(25 .0% )and acinetobacter baumannii(13 .0% )accounted for the first and second one .Pseudomoas aeruginosa showed varying degrees of resistance to most commomly used antibacterials ,but there were still some alternatives .Acinetobacter baumannii had higher resistance to most commomly used antibacterial ,except for cefoperazone sulbactam .Cefoperazone sulbactam showed high susceptibility to most gram negative organisms and gram positive or‐ganisms .Conclusion In the respiratory wards ,gram negative organisms were predominant in low respiratory tract infection .Pseud‐omoas aeruginosa and acinetobacter baumannii play a main role .The later is resistant to most commonly used antibacterials and the former showes high resisitance except for a few antibacterials .

Objective To observe the influences of Shendan Sanjie capsule on chemotherapy effect and immune index to patients with advanced non-small cell lung cancer.MethodsDividing 76 patients with advanced non-small cell lung cancer from department of oncology from January 2014 to May 2016,each with 38 cases.The control group recei-ved western chemotherapy,observation group received western chemotherapy with Shendan Sanjie capsule.The differences of related indicators were compared.Results①After chem-otherapy,in the control group, CD4+decreased,CD8+ increased and CD4+/CD8+ decreased,and before chemotherapy, the difference was significant(P<0.05).In observation group,there was no significant difference in CD4+, CD8+, CD4+ / CD8+ levels.The above indicators of observation group were better than that of control group.②After chemotherapy,RR(CR+PR)rate of observation group were 57.89%, higher than the control group with 36.84%(P<0.05).③During chemotherapy,toxic side effect ratio of observation group was lower than that of the control group(P<0.05).ConclusionComparing Shen Dan Sanjie capsule can adjust patient immunity and reduce side effects of chemotherapy during chemotherapy.

Objective:To investigate the effects of nitric oxide donor,sodium nitroprusside(SNP)on the expression and production of TLR4 in U937 induced by LPS.Methods:U937 was induced to maturation by PMA and then stimulated by LPS.Then the cells were treated with SNP and divided into four groups:control group without stimulation of LPS,LPS group(10 ng/ml LPS+100 ng/ml rhLBP),low dose SNP group and high dose SNP group(50,500 ?mol/L SNP respectly).The mRNA and protein of TLR4 was determined by RT-PCR and Western blot.Results:The mRNA of TLR4 in SNP groups was lower than those in LPS group(0.308?0.050 and 0.138?0.0044 vs 0.342?0.098,P0.05).Conclusion:SNP might have a potential protective role in LPS induced inflammation such as sepsis and acute lung injury through inhibiting the mRNA and protein expression of TLR4.