Hypoxic microenvironment always exists in solid tumors, and it closely relates to the development and metastasis of solid tumor. As a main transcription factor responding to hypoxic environment, hypoxia-inducible factor (HIF) can promote tumor cell proliferation, survival, angiogenesis, and epithelial-mesenchymal transition (EMT), etc. EMT is a biological process that epithelial phenotype was transformed into mesenchymal phenotype, which is mainly associated with its signaling pathways, transcription factors, inflammatory factors and miRNAs, and plays a vital role in tumor invasion and metastasis. This paper summarizes the effects of hypoxia signaling pathway, Wnt/β-catenin signaling pathway, Notch signaling pathway, NF-κB signaling pathway, Hedgehog (Hh) signaling pathway and PI3K/Akt signaling pathway on the EMT of tumor cells.
ObjectiveTo systematically evaluate the association between human leukocyte antigen DQ (HLA-DQ) gene rs2856718A>G, rs9275572A>G polymorphisms and the risk of chronic hepatitis B. MethodsPubMed, EMbase, CBM, WanFang Data, CNKI and VIP databases were systematically searched from inception to April 2015 to collect case-control studies about HLA-DQ gene polymorphisms and the risk of chronic hepatitis B. Two reviewers independently screened literature, extracted data and assessed the risk of bias of included studies. Then, meta-analysis was performed using RevMan 5.3 software, and Stata 12.0 software was used for sensitivity and publication bias analysis. ResultsA total of 6 papers involving 8 case-control studies were included, which involved 3 690 cases and 6 267 controls. The results of meta-analysis showed that:the rs2856718A>G polymorphism was associated with the decreased risk of chronic hepatitis B (AG+GG vs. AA:OR=0.63, 95%CI 0.51 to 0.78, P=0.000; GG vs. AG+AA:OR=0.69, 95%CI 0.61 to 0.79, P=0.000; GG vs. AA:OR=0.56, 95%CI 0.48 to 0.64, P=0.000; GA vs. AA:OR=0.64, 95%CI 0.47 to 0.88, P=0.006; G vs. A:OR=0.74, 95%CI 0.68 to 0.79, P=0.000). The rs9275572A>G polymorphism was not associated with the risk of chronic hepatitis B (AG+GG vs. AA:OR=1.11, 95%CI 0.55 to 2.23, P=0.770; GG vs. AG+AA:OR=1.10, 95%CI 0.84 to 1.45, P=0.500; GG vs. AA:OR=1.14, 95%CI 0.54 to 2.41, P=0.730; AG vs. AA:OR=1.06, 95%CI 0.56 to 2.02, P=0.860; G vs. A:OR=1.11, 95%CI 0.83 to 1.48, P=0.490). ConclusionHLA-DQ gene rs2856718 A>G polymorphism is significantly associated with decreased risk of chronic hepatitis B, but the rs9271319 A>G polymorphism is not associated with the risk of chronic hepatitis B.
ObjectiveTo systematically review the effectiveness and safety of laparoscopic operation versus laparotomy for stage I-IIa cervical cancer. MethodDatabases including PubMed, EMbase, Web of Knowledge, CBM, WanFang Data and CNKI were searched to collect controlled trials and cohort studies about laparoscopic operation versus laparotomy for stage I-IIa cervical cancer from inception to July 2014. Two reviewers independently screened literature, extracted data, and evaluated the methodological quality of included studies. Then, meta-analysis was performed using RevMan 5.2 software. ResultsA total of 3 RCTs, 4 non-randomized controlled trials and 11 cohort studies involving 2 020 patients were included. The results of meta-analysis showed that, compared with laparotomy, laparoscopy operation could reduce intraoperative blood loss (MD=-247.99, 95%CI -408.90 to -87.07, P=0.003) , the incidence of perioperative blood transfusion (OR=0.33, 95%CI 0.21 to 0.52, P<0.000 01) , haemoglobin level before and after surgery (MD=-0.98, 95%CI -0.13 to -0.93, P<0.000 01) , postoperative complication (OR=0.61, 95%CI 0.40 to 0.93, P=0.02) , and shorten postoperative exhaust time (MD=-17.41, 95%CI -32.79 to -2.03, P=0.03) and postoperative hospitalization days (MD=-2.51, 95%CI -3.25 to -1.78, P<0.000 01) . There were no significant differences between two groups in the number of pelvic lymph nodes removed, operative complications, as well as the recurrence rate, mortality and non-recurrence survivals after 2 to 5 years of follow-up. But the operation time of the laparoscopy operation group was longer than that of the laparotomy group. ConclusionsCurrent evidence shows that compared with laparotomy, laparoscopic operation for early stage cervical cancer has less trauma, less blood loss, shorter hospitalization days and less postoperative complications. Due to the limited quantity of the included studies, more studies are needed to verify the above conclusion.
ObjectiveTo make a better understanding of potassium channel-complex autoimmune antibodies associated limbic encephalitis, we studied in details with patients of this autoimmune disease accompanying without tumors. MethodsDiagnosis of 3 patients were confirmed by antibody detection in serum or CSF. All the clinical data, including history, CSF data, cranial MRI, EEG, pelvic ultrasound and treatment strategy, were carefully gathered. Two to eleven months follow-up were carried out. Results3 female adult patients showed common initial manifestation of seizures, and changes of consciousness, mental disorder and cognitive impairment. Hyponatremia was found in one LGI1-Ab+ patient. Cranial MRI showed unilateral or bilateral signal changes with limbic system. Changes of CSF and EEG were nonspecific. All 3 patients became recovery in different levels after two to eleven months. ConclusionsPotassium channel-complex antibodies associated encephalitis may be a common type of limbic encephalitis in adults without tumors. Seizures may be the first sign of the disease. Hyponatremia is one of characteristics of LGI1-Ab+ patient. Patients may have a fairly good short outcome.
Mechano growth factor (MGF) is an autocrine/paracrine factor and sensitive to mechanical stimulation. MGF can be highly expressed in various soft tissues under physical stimuli, biochemistry stimuli or in damaged situation. MGF may "compensate" the stress for tissue in the processing of tissue repair. MGF can effectively accelerate the repair of the soft tissue by promoting the proliferation, migration and differentiation of cells. This paper summarizes the MGF expressions in different soft tissues and their functions in soft tissue repair. The paper also discusses current problems and challenges in using MGF to repair the soft tissue.
ObjectiveTo systematically review the efficacy and safety of primary percutaneous coronary intervention (PCI) via radial access versus via femoral access for patients with acute ST-segment elevation myocardial infarction (STEMI). MethodsRandomized controlled trials (RCTs) about the clinical efficacy and safety of radial access for PCI in patients with acute STEMI were searched in PubMed, EMbase, CBM, The Cochrane Library (Issue 6, 2014), CNKI, VIP, and WanFang Data from 2000 to November 2014. Literature screening according to the inclusion and exclusion criteria, data extraction and methodological quality assessment of included studies were completed by two reviewers independently. Then meta-analysis was conducted using RevMan 5.2 software. ResultsA total of fourteen RCTs involving 5 212 patients were enrolled. The results indicated that:a) radial access was associated with decreased risks of mortality (OR=0.54, 95%CI 0.40 to 0.74, P=0.000 1); decreased incidences of major bleeding (OR=0.50, 95%CI 0.34 to 0.74, P=0.000 8), major adverse cardiac events (MACE) (OR=0.65, 95%CI 0.50 to 0.83, P=0.000 6), and puncture site complications (OR=0.35, 95%CI 0.25 to 0.49, P < 0.000 01); and decreased hospital duration (MD=-2.14, 95%CI-3.97 to-0.31, P=0.002). b) However, the two groups were alike in the success rate of operation, exposure time of X ray, risk of stroke, and the rate of CABG. PCI via radial access took more operation time than that via femoral access, and PCI via radial access had a higher incidence of changing puncture access. ConclusionFor acute STEMI patients undergoing PCI, radial access could significantly reduce mortality, and incidences of major bleeding, MACE and puncture site complications. Therefore, under the conditions of strict indication control and increased operation skills, PCI via radial access is effective and safe in the treatment of acute STEMI. Due to limited quality and quantity of the included studies, more large-scale, multi-centre, high quality RCTs are needed to verify the above conclusion.
ObjectiveTo optimize HSP65-MUC1 fusion protein purification in pilot scale through protein purification techniques and identify the methods for biological activity detection. MethodsE. coli expressing HSP65-MUC1 was obtained by fermentation, then homogenized to obtain the supernatant. To acquire high-purity, high-quality HSP65-MUC1, the supernatant was treated with saturated ammonium sulfate, phenyl sepharose FF column and Q FF ion-exchange chromatography column purification. The expression of CD86 on the surface of DC cells treated with HSP65-MUC1 was determined with flow cytometry. ResultsE. coli containing pET28a-HSP65-MUC1 recombinant plasmid can effectively express target protein. A total of 413.7 mg of HSP65-MUC1 was obtained after 10 g of fermented cells was treated with saturated ammonium sulfate, phenyl sepharose FF column and Q FF ion-exchange chromatography column, and the purity was nearly 96%. Compared with negative control (10.13%±0.89%), purified HSP65-MUC1 could significantly improve the expression of CD86 on the surface of DC cells (29.98%±1.02%). ConclusionThe pilot scale production of purified HSP65-MUC1 has been effectively optimized, and the methods of its biological activity detection have been identified, which simultaneously provides the basis for clinical studies.
This study was aimed to design a new, accurate and easy-to-use water bath cryo-jaw, and try to solve the problems met in small animals achilles tendon mechanical testing. The muscle-tendon-bony units were fixed in the clamps. SD rats achilles tendon were randomly divided into group A and B. Group A was tested by the newly designed water bath cryo-jaw, while group B was treated by non-water bath cryo-jaw. The mechanical tests revealed that non of the samples of the newly-designed water bath cryo-jaw in group A slipped and fell off, and the achilles tendons were in a physiologically active state, but one of the group B samples slipped and fell off, and the others had the frozen phenomenon obviously. The maximum stress, fracture displacement and Young's modulus of the rats in group A were significantly different compared to those in group B (P<0.05). In conclusion, the new water bath cryo-jaw has more advantages than traditional ones. It exhibits a good simulation in vivo in the environmental conditions for testing the mechanical properties of the achilles tendon.
ObjectiveTo assess the methodological and reporting quality of systematic reviews/Meta-analyses (SRs/MAs) of transurethral procedure for benign prostatic hyperplasia (BPH). MethodWe electronically searched databases including PubMed, The Cochrane Library (Issue 12, 2014), Sciverse, CNKI, VIP and WanFang Data from inception to December 2014 to collect SRs/MAs of transurethral procedure about BPH. Two reviewers independently screened literature and assessed the methodological and reporting quality of included SRs/MAs by AMSTAR and PRISMA checklists. ResultsA total of 33 SRs/MAs were included. The results of qualitative analysis showed that:the main methodological weakness of included SRs/MAs included the lack of protocol, disappropriate conclusion formulation, the lack of publication bias assessment, and the lack of stating the conflict of interest. The average score of AMSTAR scale was 6.27±2.14. There were 11 items in PRISMA checklist with coincidence rate over 80%, 8 items between 50% to 80%, and 8 items less than 50%. ConclusionThe methodological and reporting quality of SR/MA of transurethral procedure for BHP is low, and that may decrease the reliability and value of results from SRs/MAs in the field. Future SRs/MAs should strictly follow the related reporting guidelines in order to improve the methodological and reporting quality, so as to provide more reliable evidence for clinical decision.