Aim To detect the effect of Bio on impro-ving insulin resistance and explore its molecular mech-anism. Methods The HepG2 liver cells were derivat-ed by high concentration insulin to establish the insulin resistance cell model, and the cells were intervened by Bio. The glucose consumption was measured by glu-cose oxidase and peroxidase ( GOD-POD) assay. The expression of PPARγmRNA was detected by RT-PCR. The expression of PPARγ protein was detected by Western blot method. Results The glucose consump-tion was significantly decreased in the insulin resist-ance cells after incubated with 1 . 72 × 10 -5 mol · L-1 insulin ( P<0. 05 ) . 10 -5 ,10 -6 ,10 -7 mol · L-1 Bio increased the glucose consumption 135%,62%,39%separately in the insulin resistance cells. RT-PCR a-nalysis of PPARγ showed that Bio raised the PPARγmRNA. Western blot analysis displayed that the pro-tein of PPARγ with Bio was increased. Conclusion Bio can improve the insulin resistance of the HepG2 cells, and the molecular mechanism may be relevant with raising PPARγ expression.

Objective: To investigate the effect of sevolfurane (SEVO) post-conditioning on protein kinase B (AKT)/mammalian target of rapamycin (mTOR) pathway for protecting ischemia/reperfusion (I/R) injury in isolated rat’s heart. Methods: A total of 84 isolated rat’s heart prepared by Langendorff method were randomly divided into 7 groups andn=12 in each group.①Sham group,②I/R group,③SEVO post- conditioning (SPC) group,④NVP-BEZ235 solvent dimenthyl sulfoxide (DMSO) group,⑤Phosphatidyl inositol 3-kinase (PI3K)/mTOR dual inhibitor NVP-BEZ235 (BEZ) group,⑥BEZ+SPC group and⑦SEVO alone group. The hearts received 30 min ischemia followed by 120 min reperfusion with relevant treatment except for Sham group and SEVO group in which the hearts were without ischemia process. Myocardial infarct (MI) size and tissue pathological changes were observed, protein expressions of phosphor-AKT (P-AKT)/total-AKT, P-mTOR/total-mTOR, Beclin1, Bax/Bcl-2 and cleaved Caspase-3 were examined at the end of reperfusion respectively. Results: Compared with I/R group, SPC group presented decreased MI size (26.28±4.00) % vs (49.22±3.66) % and reduced tissue pathological changes; up-regulated protein expressions of P-AKT/total-AKT and P-mTOR/total-mTOR by 79.85% and 67.02%, while down-regulated protein expressions of Beclin1, Bax/Bcl-2 and cleaved Caspase-3 by 33.77%, 69.26% and 48.84%respectively, allP<0.05. Compared with SPC group, BEZ+SPC group sowed increased MI size (53.85±4.06) % vs (26.28±4.00) %and elevated tissue pathological changes; down-regulated proteins expressions of P-AKT/total-AKT and P-mTOR/total-mTOR by 46.06% and 42.95%, while up-regulated protein expressions of Beclin1, Bax/Bcl-2 and cleaved Caspase-3 by 29.90%, 206.85% and 114.65% respectively, allP<0.05. Conclusion: SPC may activate AKT/mTOR pathway and inhibit cardiomyocyte autophagy and apoptosis, thereby attenuate I/R injury in isolated rats’ heart.

Objective To investigate the relationship of the metastasis-associated genes and its copy numbers variation in the highly metastatic human epithelial ovarian cancer cell line HO-8910PM. Methods The differentially expressed genes and its copy number variation between HO-8910PM cell line and normal ovarian tissues was detected by human genome UI33A 2.0 gene chip and human mapping 10K array 2.0 gene chip, and the data was analyzed by bioinformatics. Some of metastasis-associated genes were validated the results of single nucleotide polymorphism (SNP) and cDNA chips by fluorescence in situ hybridization (FISH) and real-time quantitative PCR. Results Integrate analysis of two gene chips data showed that there were 385 differentially expressed genes in the same and 379 SNP positional point (6 of them, included 2 genes) between HO-8910PM cell line and normal ovarian tissues, these copy number amplification of 379 SNP positional point of chromosome were ≥3, which had 240, deletion ≤ 1 had 139. Chromosome location analysis showed that there were 385 differentially expressed genes located at all chromosomes, and 261 of them ( 67.8%, 261/385 ) located at 10 chromosomes, included that 34 (8.8% ), 33 ( 8.6% ), 28 (7.3%), 27 (7.0%), 25 (6.5%), 24 (6.2%) of them located at chromosome 3, 2, 9, 10, 1 and 11 respectively, and 23 (6.0%) of them at chromosome 6 and 12 each, 22 (5.7%) of them at chromosome 4 and 5 each. For the function of differentially expressed genes, the results showed that 99 (25.7% ) genes belonged to the family of enzymes and their regulators, 54 ( 14.0% ) genes associated with signal transduction, 50 (13.0%) genes associated with nucleic acid binding, and 36 (9.4%) genes associated with protein binding. Conclusion We have demonstrated that there are 4 kinds of differentially expressed genes related to metastasis of ovarian cancer, which belonged to the families enzyme and its regulator, nucleic acid binding, signal transduction and protein binding, and located at chromosome 1, 2, 3, 4, 5, 6, 9, 10, 11 and 12.

Parathyroid hormone related protein (PTHrP) has important biological functions in calcium metabolism. The aim of this study was to silence the expression of PTHrP by RNA interference and recombinant adenovirus, and to provide a material to investigate the relative functions of PTHrP in goat mammary gland epithelial cell. The Block-iT shRNA interference system was used in this experiment. We designed and synthesized two pairs of complementary single-strand DNA oligonucleotides (shRNA-322/357) targeting two different sites of PTHrP mRNA. Then the oligonucleotides were inserted into shuttle vector pENTR/CMV-GFP/U6. After detection of the interference efficiency by Western blotting, we chose pENTR/CMV-GFP/U6-322 and adenovirus backbone vector pAD/PL-DEST to produce recombinant vector pAD/PL-DEST/CMV-GFP/U6-322. The first generation recombinant adenovirus particles (AD-PTHrP-322) were produced and further amplified by transfecting HEK-293 cells. The titer of the recombinant adenovirus reached 2.0 x 1(9) PFU/mL determined by TCID50 assays. The result of real-time quantitative PCR indicated that mRNA expression levels of gene were reduced 29.2%, 68.1% and 82.6% (P < 0.05), respectively, when goat mammary gland epithelial cells were infected with AD-PTHrP-322 after 24, 48 and 72 h, in which PTHrP. Western blotting also showed that the expression of PTHrP was reduced by infecting the cells with AD-PTHrP-322. AD-PTHrP-322 has been proved with significant interference effect on expression of PTHrP.
Adenoviridae ; genetics ; metabolism ; Animals ; Epithelial Cells ; metabolism ; Female ; Genetic Vectors ; genetics ; Goats ; HEK293 Cells ; Humans ; Mammary Glands, Animal ; cytology ; Parathyroid Hormone-Related Protein ; biosynthesis ; genetics ; RNA Interference ; RNA, Messenger ; biosynthesis ; genetics ; RNA, Small Interfering ; genetics ; Recombinant Proteins ; biosynthesis ; genetics ; isolation & purification ; Transfection

deltaFosB, a naturally occurring truncated isform of fosB gene, existed in many tissues stably and played an important role in formation and differentiation of adipocyte and osteoblast. deltaFosB may be related to the metabolism of calcium in bone and mammary gland and regulate the signal pathway of calcium transfer from bone to mammary gland. We first sub-cloned deltafosB gene of goat into the vector pET32a to construct prokaryotic expression vector pET32a-deltafosB. Then we induced for deltafosB gene expression efficiently by IPTG. Finally we immunized the adult rabbits with purified recombinant deltaFosB to prepare rabbit anti-goat deltaFosB polyclonal antibody. iELISA analysis showed the antibody with the titer of 1:51 200, and Western blotting result showed that the antibody could specifically detect the deltaFosB protein expressed in prokaryotic cell and HEK-293 cell, respectively. Further Western blotting assay showed that deltaFosB expressed in various tissues of goat in vivo.
Animals ; Antibodies, Monoclonal ; biosynthesis ; Cloning, Molecular ; Escherichia coli ; genetics ; metabolism ; Gene Expression ; Goats ; Proto-Oncogene Proteins c-fos ; biosynthesis ; genetics ; immunology ; Rabbits ; Recombinant Proteins ; biosynthesis ; genetics ; immunology

Since the introduction of laparo-endoscopic single-site surgery(LESS) in China in 2008, this technique has developed rapidly in the domestic urology field. This paper systematically reviews and summarizes the historical process of the development of single-site laparoscopy technique in domestic urology. From the exploration period, the rapid development period, the rational thinking period to the current breakthrough development period, the technology has made great progress in related theoretical foundations, surgical operation skills, device development and clinical norms. It has many advantages such as less postoperative pain, minor damage in body surface, and rapid recovery. But the limitations including narrow operating space and great instrument interference are still remain. At present, the development of domestic single-site laparoscopy technique is generally stable and standardized. The robotic single-site surgery system may be able to effectively solve the problem of instrument interference, but the clinical advantages and application value of the robotic single-site surgery system still need to be further clarified by prospective, multi-center, large sample and high-quality clinical research.

Objective:To evaluate the efficacy and safety of endoscopic retrograde cholangiopancreatography (ERCP) after pancreaticoduodenectomy and endoscopic selection strategies.Methods:Clinical data of 34 patients treated with ERCP after pancreaticoduodenectomy at the Endoscopic Center of the First Affiliated Hospital of Air Force Medical University from January 2013 to December 2021 were retrospectively analyzed. The success rates of endoscopic insertion, diagnosis, treatment and ERCP, and the incidence of adverse events were analyzed.Results:Fifty ERCP treatments were performed in 34 patients. The success rates of endoscopic insertion, diagnosis, treatment, and ERCP after pancreaticoduodenectomy were 92.0% (46/50), 93.5% (43/46), 88.4% (38/43) and 76.0% (38/50), respectively. The success rates of ERCP assisted with colonoscope and balloon-assisted enterosocpe were 76.0% (19/25) and 75.0% (18/24), respectively. There were 3 adverse events, including 1 case of anastomotic mucosa tear during surgery, 1 case of cardiopulmonary arrest and 1 case of postoperative cholangitis.Conclusion:ERCP is effective and safe after pancreaticoduodenectomy in general. ERCP assisted with colonoscope and balloon-assisted colonoscope shows similar success rate after pancreaticoduodenectomy.

Objective:To explore the effects of estrogen receptor α (ERα) encoded by protein encoding gene ESR1 on the radiation resistance of breast cancer cells and their molecular mechanisms.Methods:The ESR1 overexpression plasmid was transfected into estrogen receptor (ER)-negative breast cancer cells. Then, the shRNA-ESR1 vector was introduced into ER-positive cell to establish models with different phenotype. The ATG5 mRNA level and protein expression levels of LC3B-I, LC3B-II, P62, FIP200, ATG5, ATG7, ATG12, Beclin1, ULK1 were detected using qPCR and Western blot techniques. Cell death was measured using flow cytometry. The radiation sensitivity was determined through the colony formation assay. The mortality of breast cancer cells under the autophagy gene knockdown and overexpression or treated with estrogen receptor inhibitor (TAM) combined with ionizing radiation were detected by trypan blue staining.Results:Under the condition of 8 Gy X-ray irradiation, the knockdown of ESR1 in ER-positive ZR75 breast cancer cells promoted cell death ( t = 3.49, 3.13, P < 0.05), while the overexpression of ESR1 in ER-negative MDA-MB-231 breast cancer cells inhibited cell death ( t = 4.16, 7.48, P < 0.05). Compared to the control group, the treatment with chloroquine increased the number of formed colonies of ESR1 knockdown ZR75 cells ( t = 8.49, P < 0.05), and inhibiting autophagy could reduce the death of ZR75 cells caused by ESR1 silencing. Under the treatment with ionizing radiation, the overexpression of ESR1 in MDA-MB-231 cells promoted protective autophagy, which, however, was reduced after ESR1 knockdown in ZR75 cells. Furthermore, it was observed that the knockdown of ATG5 in ZR75 cells was associated with reduced autophagy and an increase in cell death ( t = 4.19, 6.39, P < 0.05). In contrast, the overexpression of ATG5 in ZR75 cells reversed the increase in cell death caused by ESR1 knockdown ( t = 1.70, 4.65, P < 0.05). After the treatment of ER-positive ZR75 breast cancer cells with TAM, the expressions of ATG5 and ATG12 decreased, suggesting inhibited autophagy and an increase in cell death ( t = 18.70, P < 0.05). Furthermore, these processes were promoted by ionizing radiation ( t = 16.82, P < 0.05). Conclusions:The estrogen receptor encoded by ESR1 promotes protective autophagy of ER-positive breast cancer cells by increasing ATG5, further leading to radiation resistance in ER-positive breast cancer cells. Treatment with tamoxifen combined with ionizing radiation can increase the radiation sensitivity of ER-positive breast cancer cells.

Objective To explore the scanning technique and image quality of coronary artery imaging with dual-source CT without oral Betaloc preparation in the patients with high heart rate.Methods 412 cases were undergone coronary imaging with dual-source CT (including plain and enhanced scans) ,among them,there were 30 cases with heart rate more than 100 bpm.Multi-planar reconstruction(MPR),maximum intensity projection(MIP) and volume rendering (VR) were performed using contrast-enhanced images.The image quality was classified into 3 grades, and coronary segments named according to AHA standard were evaluated.Results The average heart rate during enhanced scan in the 30 cases was (115.6?11.8)(101～139)bpm,the average breath hold time was (5.7?1.2) s.The best reconstruction phase was in the systolic phase. Altogether 424 coronary segments were evaluated, among them 93.9%(398/424)belonged to the first grade,5.0%(21/424)belonged to the second grade,and 1.2%(5/424) belonged to the third grade. Conclusion Without oral administration of Betaloc preparation, good coronary artery images can be obtained in the patients with high heart rate by dual-source CT.

Objective To explore the scan technique and image quality of coronary artery imaging with dual-source CT without oral Betaloc preparation.Methods Plain and enhanced dual-source CT coronary artery imaging without oral Betaloc preparation was performed in 215 patients with clinically suspected coronary heart disease or early-stage coronary lesions.Calcium scoring with plain scan images and multi-planar reconstruction(MPR),maximum intensity projection(MIP)and volume rendering technique (VRT)reconstruction with enhanced scan images were made in all cases.The scan technique and post reconstruction experience was summarized.The image quality was classified as three grades,and coronary segments classified according to AHA standards were evaluated.Results The median of calcium score of the 215 cases was 82.2(2.3—1827.9).The average heart rate of the enhanced scan was(80.6?15.3) (57—139)bpm.The post reconstruction methods with which coronary segments could be shown as best as possible consisted of(1)multiphases screening methods,(2)bi-phase or multiple-phase complement method,and(3)premature beat removing or arrhythmia shifting method.Altogether 3026 coronary segments were evaluated,among them 97.5% were evaluated as grade 1 image quality,2.0% were evaluated as grade 2 and 0.5% were evaluated as grade 3.The coronary segments in 91 cases were completely normal, while 112 segments with