Impact of miR-30e-5p on the invasion and migration of hepatocellular carcinoma cells through targeting PIK3CD-mediated PI3K/AKT/mTOR signaling pathway / 中国现代普通外科进展

Objective:To explore the mechanism of miR-30e-5p inhibiting the invasion and migration of hepatoma cells by targeting phosphoinositide-3-kinase catalytic delta polypeptide(PIK3CD)-mediated phosphoinositide 3-kinase(PI3K)/protein kinase B(AKT)/mammalian target of the rapamycin(mTOR)signaling pathway.Methods:HepG2 cells were divided into control group,miR-30e-5p mimics group,PIK3CD knockdown group,negative control group,and miR-30e-5p mimics+PIK3CD overexpression group by transfecting the corresponding plasmids,the expression of miR-30e-5p,PIK3CD and PI3K/AKT/mTOR signaling pathway was detected by qRT-PCR and Western blot;the proliferation rate of Hep G2 cells in each group was detected by CCK-8 method;cell migration and invasion were measured by cell scratch test and Transwell test;the expression of matrix metalloproteinase(MMP)2,MMP9,E-cadherin,N-cadherin,Vimentin in Hep G2 cells of each group were detected by Western blot.The targeting regulation of miR-30e-5p on PIK3CD in Hep G2 cells was detected by double luciferase report assay.Results:Compared with the control group,the proliferation rate,migration rate,invasion number,the expression of N-cadherin,MMP2 and MMP9 proteins,the expression of PIK3CD protein and mRNA,p-P13K/PI3K,p-AKT/AKT,and p-mTOR/mTOR in the miR-30e-5p mimics group and PIK3CD knockdown group were lower(P＜0.05),the expression of E-cadherin protein was higher(P＜0.05).Overexpression of PIK3CD attenuates the inhibitory effects of miR-30e-5p mimics on proliferation,migration and invasion of hepatocellular carcinoma cells and elevates the expression of PI3K/AKT/mTOR pathway-related proteins;miR-30e-5p targets down-regulation of PIK3CD expression.Conclusion:Up-regulation of miR-30e-5p can prevent PI3K/AKT/mTOR signal activation by decreasing the expression of PIK3CD,thereby inhibiting the proliferation,migration and invasion of hepatocellular carcinoma cells.

Relationship between study weariness, self compassion and problem behaviors of left behind adolescents / 中国学校卫生

Objective@#To analyze the association of study weariness with self compassion and problem behaviors among left behind adolescents, and to explore the moderating role of self compassion in this association.@*Methods@#By using convenient sampling method, 1 285 middle school students from two ordinary middle schools in a county of Dazhou City, Sichuan Province were selected, including 895 left behind adolescents. Study weariness, self compassion and problem behavior were assessed through questionnaire survey.@*Results@#The scores of self compassion and externalizing behaviors in boys were higher than that of girls, while the scores of internalizing behaviors of girls were higher than that of boys ( t =2.13, 1.98, -2.05, P <0.05); the scores of study weariness and internalizing behaviors among left behind adolescents were higher than those of non left behind adolescents, while the scores of self compassion of nonleft behind adolescents were higher than those of left behind adolescents ( t =2.01, 2.08, -1.99, P <0.05). The scores of externalizing behaviors among only one child and junior high school students were higher than that of non only one children and high school students, while the scores of internalization problem behaviors of high school students were higher than that of junior high school students ( t =1.95, 2.03, -2.02, P <0.05). There was a positive correlation between study weariness and problem behavior ( t =0.37， P <0.01), a negative correlation between self compassion and problem behavior ( t =-0.49， P < 0.01 ), and between study weariness and self compassin ( t =-0.46， P <0.01).@*Conclusion@#There is a positive correlation between study weariness and behaviral problems among left behind teenagers. The cultivation of self compassion ability of left behind teenagers should be encouraged and promoted.

The mechanism of tumor immune escape and research progress in esophageal cancer / 中国肿瘤临床

Escape from anti-tumor immunity is critical for tumor survival and progression.Tumor cells can suppress the anti-tumor im-mune response via recruitment of various immune cell populations or expression of inhibitory molecular factors.Esophageal cancer is a deadly disease,ranking the sixth among all cancers in mortality.Despite advances in diagnosis and therapy,esophageal cancer still has a poor prognosis.Investigation of the immune escape mechanism can provide new insights for the treatment of esophageal can-cer.This article provides an overview of the mechanism of tumor immune escape as well as research progress in esophageal cancer.

Preliminary application of laparoscopic technique in treatment of upper urinary calculi / 中国内镜杂志

Objective To evaluate the reasonable individual program for upper urinary tract calculi in minimally invasive treatment. Methods From January 2013 to June 2016, 147 patients (sides) with upper urinary calculi who had some characteristics received laparoscopic nehprectomy or corresponding surgical treatment. The number of cases of postoperative stagnation, the average hospitalization time and the average cost of treatment were compared with those of 147 patients (lateral) who underwent PCNL and URSL with the similarity, shape and load of stones before June 2016, respectively. Results The removal rate of stage I was 100.00％ (147/147) in laparoscopic group, which was significantly higher than that in PCNL and URSL group (91.84％, 135/147), the difference was statistically significant (P = 0.001); Laparoscopic group postoperative blood transfusion (0/147) and interventional hemostasis (0/147) were significantly lower in 6 cases (6/147) and 4 cases (4/147) in PCNL and URSL groups,the differences were statistically significant (P = 0.013, P = 0.044). There was no postoperative severe infection in laparoscopic group (0/147), which has no significant difference (P = 0.156) in postoperative severe infection between PCNL and URSL group (2/147). There were 9 cases of 134 cases of postoperative (9/134) fever at ≥ 38℃ in laparoscopic group, which was significantly lower than that in PCNL and URSL group (28/147), the difference was statistically significant (P = 0.002); Laparoscopic group of postoperative urinary tract stenosis in 3 cases (3/114), which was significantly lower than that of PCNL and URSL group (9/101), the difference was statistically significant (P = 0.045). The average length of stay in laparoscopic group was (10.12 ± 0.29) d, which was significantly lower (P = 0.011) than that in PCNL and URSL group (13.97 ± 0.38) days. The average cost of treatment in laparoscopic group (12541.84 ± 181.54) yuan was significantly lower than that in PCNL and URSL group (18124.65 ± 302.32) yuan, the difference was statistically significant (P = 0.018). Conclusion In some cases, when the upper urinary tract calcuci are suitable for 'cut out', the use of laparoscopic treatment is more secure; when there is a need for surgical treatment of complications, can be treated simultaneously. Laparoscopic technique is one of the important methods of minimally invasive treatment for upper urinary calculi.

Biomineralization processes of calcite induced by bacteria isolated from marine sediments

Biomineralization is a known natural phenomenon associated with a wide range of bacterial species. Bacterial-induced calcium carbonate precipitation by marine isolates was investigated in this study. Three genera of ureolytic bacteria, Sporosarcina sp., Bacillus sp. and Brevundimonas sp. were observed to precipitate calcium carbonate minerals. Of these species, Sporosarcina sp. dominated the cultured isolates. B. lentus CP28 generated higher urease activity and facilitated more efficient precipitation of calcium carbonate at 3.24 ± 0.25 × 10−4 mg/cell. X-ray diffraction indicated that the dominant calcium carbonate phase was calcite. Scanning electron microscopy showed that morphologies of the minerals were dominated by cubic, rhombic and polygonal plate-like crystals. The dynamic process of microbial calcium carbonate precipitation revealed that B. lentus CP28 precipitated calcite crystals through the enzymatic hydrolysis of urea, and that when ammonium ion concentrations reached 746 mM and the pH reached 9.6, that favored calcite precipitation at a higher level of 96 mg/L. The results of this research provide evidence that a variety of marine bacteria can induce calcium carbonate precipitation, and may influence the marine carbonate cycle in natural environments.

Analysis of prognostic factors and treatment of pulmonary metastasis from colorectal cancer / 中华外科杂志

<p><b>OBJECTIVE</b>To investigate effect of the treatments and prognostic factors of patients with pulmonary metastasis from colorectal cancer.</p><p><b>METHODS</b>Clinical data of 79 patients who suffered from lung metastatic diseases from colorectal cancer in 1990 - 2010 were retrospectively analyzed. The number of patients who had received lung operation was 22, and non-operated group contained 57 patients. Compared the prognosis of operated group and non-operated group and analyzed the prognostic factors.</p><p><b>RESULTS</b>The median survival time after the pulmonary resections was 34.5 months; the overall survival of 1-, 3- and 5-year survival rates were 90.9%, 45.4% and 4.5%, and the overall of 1-, 3-, and 5-year survival rate in non-operated group were 59.6%, 14.0% and 0. The surgery (RR = 4.805, 95% CI: 1.864 - 12.384, P = 0.001) and the number of metastasis (RR = 2.177, 95% CI: 1.431 - 3.314, P = 0.010) were the factors that could influence the patients prognosis.</p><p><b>CONCLUSION</b>The surgery for pulmonary metastases from colorectal cancer is effective.</p>

Therapeutic strategy and prognostic factors in colorectal cancer patients with pulmonary metastasis / 中华胃肠外科杂志

Patients with pulmonary metastasis from colorectal cancer have been considered to be associated with poor prognosis. It is a problem to improve survival for patients who suffer pulmonary metastasis from colorectal cancer by analyzing the prognosis of patients who underwent pulmonary surgery or not and then choose the right treatment regimen. The identification of prognostic factors is particularly important in colorectal cancer patients with pulmonary metastasis.

Endoscope-assisted microneurosurgical treatment of epidermoid at cerebello-pontine angle / 肿瘤研究与临床

Objective To study the techniques of the treatment for epidermoid with endoscope-as- sisted microneurosurgery.Methods The suboccipital,infratemporal transtentorial approach and endoscope- assisted microneurosurgery were used.Results Total resection was achieved in 10 cases,and subtotal resec- tion was made only in 2, and had no complications of all.Conclusion Endoscope-assisted microneuro- surgery can increase the total-resection rate for tumors,and reduce complications.

Development of the frame materials made of polylacticacids / 医疗卫生装备

Tissue engineering is a kind of cross subject,which develops on the basis of cell biology,molecular biology,bio-material science and clinical medicine.The aim of tissue engineering is to restore and improve the function of scathing tissue using bio-substituent.The basis of tissue engineering is to study and develop the frame materials of bio-substituent.Besides the physical and chemical properties satisfying the growth and reproduction of the seed cell,the materials should hold the following properties,including tissue compatibility,bio-degradability,degradable modulability,nontoxicity,easy to mold.The materials studied extensively are PLA and PGA.The polylacticacids frame materials have been used to be the frame materials of bone,cartilage gristle,blood vessel,nerve and skin.The preparation of polylacticacids and its improvement are reviewed in this article.The application development to tissue engineering is also presented.