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Esophageal squamous cell carcinoma (ESCC) is one of the most common malignant tumors with a poor prognosis. 4-nitroquinoline-1-oxide (4NQO) is a water-soluble quinoline derivative that can successfully induce the production of squamous cell carcinoma in vivo. Establishing and optimizing experimental methods for 4NQO induced ESCC formation in mice can provide a more suitable in situ model for the study of ESCC.
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Meniscus injury has been one of the most common knee injuries in current society. The research on artificial meniscus implants as substitutes in meniscus reconstruction therapy has become global focus in order to solve clinical problems such as irreparable meniscus injury and symptoms after full or partial meniscectomy. At present, researches on artificial meniscus implants mainly focus on biodegradable meniscus scaffolds and non-biodegradable meniscus substitutes. Although the commercialized meniscal implants, such as CMI , Actifit and NUsurface , have been applied in the clinical, none of them can perfectively restore or permanently replace the natural meniscus tissue, effectively solve the symptoms after meniscectomy, and prevent cartilage degenerative diseases. The research progress, application, advantages and disadvantages of different kinds of artificial meniscus implants are reviewed in this manuscript, and the prospect is provided.
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Objective To study the changes condition and clinical significance of serum cystatin C(Cys‐C) ,β2 microglobulin(β2‐MG) and retinol binding protein (RBP) detection in different stages of hemorrhagic fever with renal syndrome(HFRS) .Methods The levels of serum Cys‐C ,β2‐MG and RBP were detected in 22 patients with HFRS and 30 cases of healthy physical examination and the detection results were statistically analyzed by the SPSS13 .0 software .Results The serum Cys C and β2‐MG levels in every stage of HFRS were increased compared with the healthy control group(P0 .05) ,while RBP was significantly increased in the oliguria stage ,polyuria stage and convalescence stage(P 0 .05) .Conclusion β2‐MG is more sensitive than Cys‐C in the early stage of HFRS ;RBP has the clinical guidance significance in the progression of HFRS .
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<p><b>BACKGROUND</b>To investigate the biological effects of anti VEGF₁₆₅ ribozyme on human lung adenocarcinoma cell.</p><p><b>METHODS</b>Hammerhead ribozyme (VRz) against VEGF₁₆₅ gene transcripts (site 212) and its paired mutant ribozyme (mVRz) were designed and synthesized, and the cleavage activity of the ribozymes on target RNA in a cell-free system was observed. The replication-incompetent adenovirus-mediated eukaryotic expression vectors (rpAdVRz) containing VRz and mVRz gene were constructed and identified. Then the human lung adenocarcinoma cells (A549) were infected with recombinant adenovirus. The biological characteristics of A549 cell before and after infection in vitro were inspected by Northern blot, laser confocal imaging system analysis, flow cytometry and transmission electron microscopy.</p><p><b>RESULTS</b>VRz specifically and efficiently cleaved the VEGF₁₆₅ mRNA. The rpAdVRz was successfully constructed and infected A549 cell. The level of VEGF₁₆₅ expression decreased 87% in rpAdVRz infected cells compared with the other groups, but their biological characteristics were not influenced by the expression of the exogenous gene.</p><p><b>CONCLUSIONS</b>The adenovirus mediated hammerhead ribozyme against VEGF₁₆₅ can significantly decrease the expression of VEGF₁₆₅. This provides an experimental basis for human lung cancer gene therapy with antiangiogenesis method.</p>
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The developmental speed,scale,structure,and efficiency of postgraduate education in recent 20 years in military medical universities were described and compared with those in the other universities in China.We also discussed the advantages and insufficiency of postgraduate education in military medical universities and investigated primarily the mutual relationship between the speed,structure,and the scale,so as to lay basis for formulating the further developing strategies.
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Data monitoring of No.1 Military Medical Project is very important for the accuracy of information system data. It's supposed that the statistics staff monitor the data in the network. That is, the data in daily and monthly medial reports should be checked and the checking software should be applied to the examination of the data on the first page of the case history to verify their logicality and nonvacancy.
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The achievements in recent research on osteogenetic induction of extracorporeal shock wave (SW) are introduced. The mechanism of osteogenesis inducted by SW and its effect of bone repairing are explained emphatically. Besides, the development prospects of SW in healing human disease are described and is indicated that SW will maybe a clinical method for osteoporosis and other disease in orthopedics according to its osteogenetic mechanism.
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To investigate the inhibition of HBV expression by multi-target ribozyme-expressing adenovirus vector in vivo, the ribozyme and muta-ribozyme were cloned into adenovirus vector pAd-CMV. By using the adenovirus expression system, the two plasmids were co-transfected into 293 cell line with adenovirus gene recombinant plasmids pJM17. The recombinant adenovirus were detected by plaque assay. Then the recombinant adenovirus infected the 2.2.15 cells. Using ELISA, dot-bolt hybridization and image analysis system, the inhibition of HBV expression was detected. The ribozyme and muta-ribozyme were cloned into the adenovirus vector pAd-CMV. The recombinant adenovirus could infect 2.2.15 cells and express the ribozyme. The ribozyme could decrease the expression of HBeAg by 87.1%. All these results strongly indicate that ribozyme can inhibit HBV expression in the cell, which represents a potential gene therapy for HBV infection.