Remote sensing of air pollution incorporating integrated-path differential-absorption and coherent-Doppler lidar

An innovative complex lidar system deployed on an airborne rotorcraft platform for remote sensing of atmospheric pollution is proposed and demonstrated.The system incorporates integrated-path differential absorption lidar(DIAL) and coherent-doppler lidar(CDL) techniques using a dual tunable TEA CO_(2)laser in the 9—11 μm band and a 1.55 μm fiber laser.By combining the principles of differential absorption detection and pulsed coherent detection,the system enables agile and remote sensing of atmospheric pollution.Extensive static tests validate the system’s real-time detection capabilities,including the measurement of concentration-path-length product(CL),front distance,and path wind speed of air pollution plumes over long distances exceeding 4 km.Flight experiments is conducted with the helicopter.Scanning of the pollutant concentration and the wind field is carried out in an approximately 1 km slant range over scanning angle ranges from 45°to 65°,with a radial resolution of 30 m and10 s.The test results demonstrate the system’s ability to spatially map atmospheric pollution plumes and predict their motion and dispersion patterns,thereby ensuring the protection of public safety.

Comprehensive analysis of the potential pathogenesis of COVID-19 infection and liver cancer

BACKGROUND A growing number of clinical examples suggest that coronavirus disease 2019(COVID-19)appears to have an impact on the treatment of patients with liver cancer compared to the normal population,and the prevalence of COVID-19 is significantly higher in patients with liver cancer.However,this mechanism of action has not been clarified.Gene sets for COVID-19(GSE180226)and liver cancer(GSE87630)were obtained from the Gene Expression Omnibus database.After identifying the common differentially expressed genes(DEGs)of COVID-19 and liver cancer,functional enrichment analysis,protein-protein interaction network construction and scree-ning and analysis of hub genes were performed.Subsequently,the validation of the differential expression of hub genes in the disease was performed and the regulatory network of transcription factors and hub genes was constructed.RESULTS Of 518 common DEGs were obtained by screening for functional analysis.Fifteen hub genes including aurora kinase B,cyclin B2,cell division cycle 20,cell division cycle associated 8,nucleolar and spindle associated protein 1,etc.,were further identified from DEGs using the“cytoHubba”plugin.Functional enrichment analysis of hub genes showed that these hub genes are associated with P53 signalling pathway regulation,cell cycle and other functions,and they may serve as potential molecular markers for COVID-19 and liver cancer.Finally,we selected 10 of the hub genes for in vitro expression validation in liver cancer cells.CONCLUSION Our study reveals a common pathogenesis of liver cancer and COVID-19.These common pathways and key genes may provide new ideas for further mechanistic studies.

Paravertebral block's effect on analgesia and inflammation in advanced gastric cancer patients undergoing transarterial chemoembolization and microwave ablation

BACKGROUND Transarterial chemoembolization(TACE)combined with microwave ablation(MWA)is an effective treatment strategy for patients with advanced gastric cancer and liver metastasis.However,it may cause severe postoperative pain and inflammatory responses.The paravertebral block(PVB)is a regional anesthetic technique that provides analgesia to the thoracic and abdominal regions.AIM To evaluate the effect of PVB on postoperative analgesia and inflammatory response in patients undergoing TACE combined with MWA for advanced gastric cancer and liver metastasis.METHODS Sixty patients were randomly divided into PVB and control groups.The PVB group received ultrasound-guided PVB with 0.375%ropivacaine preoperatively,whereas the control group received intravenous analgesia with sufentanil.The primary outcome was the visual analog scale(VAS)score for pain at 6 h,12 h,24 h,and 48 h after the procedure.Secondary outcomes were the dose of sufentanil used,incidence of adverse events,and levels of inflammatory markers(white blood cell count,neutrophil percentage,C-reactive protein,and procalcitonin)before and after the procedure.RESULTS The PVB group had significantly lower VAS scores at 6 h,12 h,24 h,and 48 h after the procedure compared with the control group(P<0.05).The PVB group also had a significantly lower consumption of sufentanil and a lower incidence of nausea,vomiting,and respiratory depression than did the control group(P<0.05).Compared with the control group,the PVB group had significantly lower levels of inflammatory markers 24 h and 48 h after the procedure(P<0.05).CONCLUSION PVB can effectively reduce postoperative pain and inflammatory responses and improve postoperative comfort and recovery in patients with advanced gastric cancer and liver metastasis treated with TACE combined with MWA.

Analysis of the potential biological value of pyruvate dehydrogenase E1 subunitβin human cancer

BACKGROUND The pyruvate dehydrogenase E1 subunitβ(PDHB)gene which regulates energy metabolism is located in mitochondria.However,few studies have elucidated the role and mechanism of PDHB in different cancers.AIM To comprehensive pan-cancer analysis of PDHB was performed based on bioinformatics approaches to explore its tumor diagnostic and prognostic value and tumor immune relevance in cancer.In vitro experiments were performed to examine the biological regulation of PDHB in liver cancer.METHODS Pan-cancer data related to PDHB were obtained from the Cancer Genome Atlas(TCGA)database.Analysis of the gene expression profiles of PDHB was based on TCGA and Genotype Tissue Expression Dataset databases.Cox regression analysis and Kaplan-Meier methods were used to assess the correlation between PDHB expression and survival prognosis in cancer patients.The correlation between PDHB and receiver operating characteristic diagnostic curve,clinicopathological staging,somatic mutation,tumor mutation burden(TMB),microsatellite instability(MSI),DNA methylation,and drug susceptibility in pan-cancer was also analyzed.Various algorithms were used to analyze the correlation between PDHB and immune cell infiltration and tumor chemotaxis environment,as well as the co-expression analysis of PDHB and immune checkpoint(ICP)genes.The expression and functional phenotype of PDHB in single tumor cells were studied by single-cell sequencing,and the functional enrichment analysis of PDHB-related genes was performed.The study also validated the level of mRNA or protein expression of PDHB in several cancers.Finally,in vitro experiments verified the regulatory effect of PDHB on the proliferation,migration,and invasion of liver cancer.RESULTS PDHB was significantly and differently expressed in most cancers.PDHB was significantly associated with prognosis in patients with a wide range of cancers,including kidney renal clear cell carcinoma,kidney renal papillary cell carcinoma,breast invasive carcinoma,and brain lower grade glioma.In some cancers,PDHB expression was clearly associated with gene mutations,clinicopathological stages,and expression of TMB,MSI,and ICP genes.The expression of PDHB was closely related to the infiltration of multiple immune cells in the immune microenvironment and the regulation of tumor chemotaxis environment.In addition,single-cell sequencing results showed that PDHB correlated with different biological phenotypes of multiple cancer single cells.This study further demonstrated that down-regulation of PDHB expression inhibited the proliferation,migration,and invasion functions of hepatoma cells.CONCLUSION As a member of pan-cancer,PDHB may be a novel cancer marker with potential value in diagnosing cancer,predicting prognosis,and in targeted therapy.

Expression and significance of cyclooxygenase-2 mRNA in benign and malignant ascites

AIM:To investigate the mRNA expression of cyclooxygensae-2(COX-2)in benign and malignant ascites,and to explore the difference in COX-2 mRNA expression among different diseases.METHODS:A total of 36 samples were collected from the Fifth Affiliated Hospital of Sun Yat-Sen University and divided into two experimental groups:benign ascites(n=21)and malignant ascites(n=15).Benign ascites included cirrhotic ascites(n=10)and tuberculous ascites(n=5).Malignant ascites included oophoroma(n=7),cancer of colon(n=5),cancer of the liver(n=6),gastric cancer(n=2),and bladder carcinoma(n=1).The mRNA expression of COX-2 in ascites was examined with reverse transcriptase polymerase chain reaction(RT-PCR)technology,and the positive rate of COX-2 mRNA was compared between different diseases.RESULTS:The positive rate of COX-2 mRNA in malignant ascites was 42.9%(9/21),which was significantly higher than in benign ascites,6.7%(1/15),difference being significant between these two groups(χ2=4.051,P=0.044).The proportion of the positive rate in the malignant ascites was as follows:ovarian cancers57.1%(4/7),colon cancer 40.0%(2/5),liver cancer33.3%(2/6),gastric cancer 50.0%(1/2),and bladder cancer 0.00%(0/1).However,there was no significant difference in COX-2 mRNA expression among various tumors with malignant ascites(χ2=1.614,P=0.806).Among the benign ascites,COX-2 mRNA levels were different between the tuberculous ascites(0/5)and cirrhotic ascites(1/10),but there was no significant difference(P=1.000).CONCLUSION:COX-2 mRNA,detected by RT-PCR,is useful in the differential diagnosis of benign and malignant ascites,which also has potential value in the clinical diagnosis of tumors.

Green and efficient dry gel conversion synthesis of SAPO-34 catalyst with plate-like morphology

SAPO-34 catalyst with plate-like morphology was designed and synthesized for the first time, by the dry gel conversion method using cheap triethylamine as a structure-directing agent assisted with seed suspension containing nanosheet-like SAPO-34 seed. The latter played an important role in formation of SAPO-34 （CHA-type） with plate-like morphology. In addition, the yield of the product in the synthesis system containing seed suspension reached 97%, 15% higher than that obtained in the corre- sponding synthesis system without the seed suspension. Meanwhile, the plate-like SAPO-34 catalysts synthesized by this method exhibited higher selectivity to light olefins and longer lifetime in methanol-to-olefins （MTO） reaction than the traditional cubic SAPO-34 catalyst. This work provides a new technical route for green and efficient synthesis of SAPO-34 catalysts with improved MTO performance.

The influence of metabolic syndrome on atrial fibrillation recurrence: five-year outcomes after a single cryoballoon ablation procedure

BACKGROUND Metabolic syndrome(MetS)has been reported as a risk factor of atrial fibrillation(AF)recurrence after radi-ofrequency catheter ablation.This study aimed to investigate the long-term influence of MetS on paroxysmal AF recurrence after a single cryoballoon ablation procedure,which was scarcely investigated yet in Chinese population.METHODS In total,137 paroxysmal AF patients who had successfully completed a single cryoballoon ablation procedure at Fuwai Hospital,Beijing,China from December 2013 to October 2015 were enrolled.Excepting for patients with AF recurrence,all patients were followed up for no less than five years.Independent predictors of AF recurrence were determined by Cox propor-tional hazards regression analysis.RESULTS Among 137 paroxysmal AF patients,91 patients(66.4%)had successfully achieved overall five-year follow-up after a single cryoballoon ablation procedure,and 44 patients(32.1%)had MetS.Patients with MetS had a significant lower incidence of freedom from AF recurrence than those without MetS(50.0%vs.74.2%,log-rank P<0.01)during the five-year follow-up.MetS(HR=1.95,95%CI:1.069−3.551,P=0.030)was an independent predictor of AF recurrence after adjusting for multiple factors.After the second year post cryoballoon ablation procedure,the recurrence rate of AF gradually increased in patients with MetS,in con-trast,decreased recurrence rate of AF in patients without MetS.CONCLUSIONS MetS is an independent predictor for five-year AF recurrence after a single cryoballoon ablation procedure in paroxysmal AF patients.Combination therapy of AF and MetS may improve the long-term outcomes of AF patients.

Coupling effect of the conductivities of Li ions and electrons by introducing LLTO@C fibers in the LiNi0.8Co0.15Al0.05O2 cathode

To probe the coupling effect of the electron and Li ion conductivities in Ni-rich layered materials(LiNi0.8Co0.15Al0.05O2,NCA),lithium lanthanum titanate(LLTO)nanofiber and carbon-coated LLTO fiber(LLTO@C)materials were introduced to polyvinylidene difluoride in a cathode.The enhancement of the conductivity was indicated by the suppressed impedance and polarization.At 1 and 5 C,the cathodes with coupling conductive paths had a more stable cycling performance.The coupling mechanism was analyzed based on the chemical state and structure evolution of NCA after cycling for 200 cycles at 5 C.In the pristine cathode,the propagation of lattice damaged regions,which consist of high-density edge-dislocation walls,destroyed the bulk integrity of NCA.In addition,the formation of a rock-salt phase on the surface of NCA caused a capacity loss.In contrast,in the LLTO@C modified cathode,although the formation of dislocation-driven atomic lattice broken regions and cation mixing occurred,they were limited to a scale of several atoms,which retarded the generation of the rock-salt phase and resulted in a pre-eminent capacity retention.Only NiO phase“pitting”occurred.A mechanism based on the synergistic transport of Li ions and electrons was proposed.

The Role of Multimodality Imaging Techniques on Differential Diagnosis of Precancerous Nodules and Hepatocellular Carcinoma

In recent years, the incidence of hepatocellular carcinoma (HCC) has been increasing worldwide, and its high mortality seriously threatens public health. Early detection and treatment are crucial to improving the survival rate. Imaging examination widely used for the diagnosis of HCC and provides a non-invasive means of tumor visualization. The rapid development of medical imaging technology is expected to improve early-stage diagnosis rates for HCC. This article summarizes the methods for the differential diagnosis of premalignant dysplastic nodule (DN) and small hepatocellular carcinoma during the carcinogenesis of cirrhosis and reviews their application. In addition, a discussion on some recently patented medical imaging development was also presented.

A model System for Validation of PET Radiopharmaceuticals: Focusing on Tumor Microenvironment

Positron emission tomography (PET) imaging has emerged as an important clinical tool for cancer management, and specifically targeted radiopharmaceuticals play critical roles on PET molecular imaging. Solid cancers have highly complex and heterogeneous microenvironment, this review focused on those microenvironmental factors such as hypoxia, proliferation and perfusion and, accordingly, a novel test system for validation of current and novel targeted imaging radiopharmaceuticals. In this review, we have introduced the establishment of cancer and metastases models in nude mice, visualization of microenvironmental components of hypoxia, proliferation, perfusion, stroma and necrosis in cancers and metastases for establishing the microenvironment based model system, and validation of several radio- pharmaceuticals such as 18F-fluoro-2-deoxyglucose (18F-FDG) 18F-fluorothymidine (18F-FLT), 18F-misonidazole (18F- FMISO) using the system. We found that 18F-FLT accumulates in proliferating cancer cells, while 18F-FMISO and 18F-FDG mostly accumulate in hypoxic and non-proliferative cancer cells, 18F-FDG shares roughly similar intratumoral distribution pattern with 18F-FMISO and IAZGP, but mutually excludes 18F-FLT. This model system validated current tracers for imaging glucose metabolism, hypoxia and proliferation in cancer and metastases, therefore, can be used for novel targeted radiopharmaceuticals validation.

Rheo-optic in situ synchronous study on the gelation behaviour and mechanism of waxy crude oil emulsions

An improved rheo-optic in situ synchronous measurement system was employed to investigate the gelation behaviour and mechanism of waxy crude oil emulsions. By combining transmitted natural light and reflected polarized light microscopy, a multiangle composite light source was built to achieve the simultaneous observation of wax crystals and emulsified water droplets, as well as their dynamic aggregation process. Main outcomes on the microscopic mechanism were obtained by developed microscopic image processing method. It was found that the microstructure of W/O waxy crude oil emulsion has the evolution of “individual structure--homogeneous aggregate structure--heterogeneous coaggregate structure--floc structure” during the static cooling, which results in the four stages during gelation process. Different from previous studies, the aggregation of emulsified water droplets was found to be more significant and contributes to the formation and development of the wax crystals-emulsified water droplets coaggregate, which plays a decisive role in the further evolution of the gelled microstructure. Time series microscopic images show the dynamic aggregation of emulsified water droplets and wax crystals. Two different aggregation behaviours between wax crystals and water droplets were observed. That wax crystals can not only embed in gaps between adjacent water droplets and enhance the structure, but also surround the outside of the water droplets and continue to grow resulting in the interconnection of different coaggregates to form a larger floc structure. In addition, correlation between viscoelasticity and microstructure evolution of waxy crude oil emulsions of different water contents was discussed. With increasing water contents, the microstructure is changed from wax crystal flocculation structure as the main skeleton and the emulsified water droplets embedded in it, into the aggregation of emulsified water droplets occupying the main position. When the number of wax crystals and water droplets reaches a certain ratio, did wax crystals form coaggregates with emulsified water droplets, and the remaining wax crystals formed an overall flocculation structure, the viscoelasticity of the waxy crude oil emulsion is the highest.

Adjuvant therapy for orbital non-rhabdomyosarcoma soft tissue sarcoma:comparison of long-term outcome between radiotherapy and chemotherapy

AIM:To illustrate clinicopathological features of orbital non-rhabdomyosarcoma soft tissue sarcoma(NRSTS),and to compare the treatment outcome between postoperative radiotherapy(RT) and chemotherapy in a retrospective analysis nearly 20y.METHODS:A retrospective cohort study of 56 patients with orbital NRSTS were reviewed,34 of whom received postoperative RT,and 22 received postoperative chemotherapy.The clinicopathological features,local recurrence,metastases,and survival data were recorded.Survival analysis was performed using the Kaplan-Meier method.RESULTS:During follow-up(111.8mo,ranged 8-233mo) for 56 patients,19 patients of them developed local recurrence,and 7 patients developed distant metastases.Fifteen patients died during follow-up period.Overall survival rates considering the whole study group was 78.57% at 5y,and 72.16% at 10y after the initial diagnosis.Compared with chemotherapy,RT was associated with lower risk of local recurrence [hazard ratio for RT vs chemotherapy,0.263,95% confidence interval(CI),0.095-0.728,P=0.0015];with lower risk of distant metastasis(hazard ratio for RT vs chemotherapy,0.073,95%CI,0.015-0.364,P=0.0014);and with lower risk of death from disease(hazard ratio for RT vs chemotherapy,0.066,95%CI,0.022-0.200,P<0.0001).The 5-year survival rate in RT group was 97.06% compared to 50% in chemotherapy group.CONCLUSION:In patients with orbital NRSTS,postoperative RT provides better control of local recurrence,distant metastasis,and death from disease than chemotherapy.RT is the more preferrable adjuvant therapy compared to chemotherapy possibly.

ZIF-8-functionalized polymer electrolyte with enhanced performance for high-temperature solid-state lithium metal batteries

Solid polymer electrolytes(SPEs)with high ionic conductivity are desirable for solid-state lithium metal batteries(SSLMBs)to achieve enhanced safety and energy density.Incorporating nanofillers into a polymeric matrix to develop nanocomposite solid electrolytes(NCSEs)has become a promising method for improving the ionic conductivity of the SPEs.Here,a novel ZIF-8-functionalized NCSE was prepared for high-temperature S SLMB s using an in situ radical polymerization method.It is found that the ZIF-8 nanoparticles could reduce the crystallinity of polymer segments and offer a Lewis acid surface that promotes the dissociation of lithium bis(trifluoromethanesulfonyl)imide(LiTFSI)and stabilizes the TFSI^(-) anion movement.Thus,the as-prepared NCSE exhibits an outstanding ionic conductivity of 1.63×10^(-3)S·cm^(-1),an electrochem ical stability window of 5.0 V at 80℃,and excellent interface compatibility with lithium metal anode with a stable polarization over 2000 h.Furthermore,the assembled SSLMBs with LiFePO_(4)cathode show dendrite-free Li-metal surface,good rate capability,and stable cycling stability with a capacity retention of 70%over 1000 cycles at a high temperature of 80℃.This work provides valuable insights into promoting the ionic conductivity of SPEs.

Rational design of a DNA-launched live attenuated vaccine against human enterovirus 71

Human Enterovirus 71(EV71)has emerged as one of the predominant causative agents of hand,foot and mouth disease(HFMD)with global impact.Despite the inactivated vaccine being licensed,other vaccine candidates based on advanced technology platforms are under development.In this report,we rationally designed and constructed two DNA-launched live attenuated vaccine candidates(pDL-EV71)under the control of specific promoters.In vitro and in vivo transfection with pDL-EV71 driven by the CMV promoter successfully yielded fully infectious EV71.More importantly,the administration of pDL-EV71 did not cause clinical symptoms following intracranial or intramuscular inoculation in neonatal and IFNα/βR/mice,demonstrating its safety profile.Moreover,a single-dose or two-dose immunization with pDL-EV71 elicited robust neutralizing antibodies against EV71 as well as an antigen-specific cellular response in mice.A single-dose immunization with 10μg of pDL-EV71 conferred complete protection against lethal EV71 infection in neonates born to immunized maternal mice.Overall,our present results demonstrate that pDL-EV71 is a safe and effective vaccine candidate against EV71 for further development.

水下与常规内镜下黏膜切除术治疗大肠息肉有效性及安全性的Meta分析

目的比较常规内镜下黏膜切除术(CEMR)与水下内镜下黏膜切除术(UEMR)两种治疗方法在切除大肠息肉方面的有效性及安全性。方法检索近5年(2016年1月-2021年1月)发表在PubMed、Embase、Cochrane Library、中国知网(CNKI)、中国生物医学文献数据库(CBM)及万方等数据库有关UEMR及CEMR治疗大肠息肉的对比研究,采用Review Manager 5.3.5软件对两种手术方式的整块切除率、治愈性切除率、复发率、不良事件发生率、术中出血、迟发性出血和穿孔等多个方面进行Meta分析。结果共纳入10篇文献,涉及1954名患者,2351个息肉病变。其中,UEMR组1151个,CEMR组1200个。Meta分析的结果显示:与CEMR相比,UEMR在整块切除率(RR=1.10,P=0.000)、治愈性切除率(RR=1.36,P=0.000)及切除时间(MD=-8.06,P=0.030)上更具优势,并有更低的术后复发率(RR=0.45,P=0.000)、不良事件发生率(RR=0.69,P=0.020)和术中出血率(RR=0.58,P=0.003),但迟发性出血和穿孔方面,两者差异均无统计学意义(P>0.05)。结论UEMR是一种安全、有效并可以替代CEMR的技术方法,值得在临床推广应用。

Mcc950对H_2O_2诱导的ARPE-19细胞炎性损伤的保护作用

目的:探讨Mcc950对过氧化氢(H_2O_2)诱导的人视网膜色素上皮细胞(ARPE-19细胞)炎性损伤的保护作用。方法:将ARPE-19细胞分为正常对照组、H_2O_2损伤组、单纯Mcc950给药组、Mcc950预处理+H_2O_2损伤组,采用CCK-8法检测细胞活力并确定H_2O_2和Mcc950合适的实验浓度,ELISA法检测细胞分泌的IL-1β浓度,免疫印迹(Western blot)法检测细胞中NLRP3炎性小体相关蛋白的表达情况,TUNEL染色法观察细胞凋亡情况。结果:细胞活力随H_2O_2刺激浓度的增加逐渐下降,H_2O_2浓度为400μmol/L时细胞活力显著降低;而0.1、1μmol/L Mcc950对细胞活力无显著影响,故选取400μmol/L H_2O_2和1μmol/L Mcc950作为合适的实验浓度。与正常对照组相比,H_2O_2损伤组细胞活力显著降低,细胞上清液中IL-1β浓度显著升高,细胞凋亡率明显增加,差异均有统计学意义(P<0.05),而与H_2O_2损伤组比较,Mcc950预处理+H_2O_2损伤组细胞活力明显升高,细胞上清液中IL-1β浓度和细胞凋亡率均降低,差异均有统计学意义(P<0.05)。Western blot检测结果显示,H_2O_2能够促进细胞中NLRP3、Pro-caspase1和caspase1的表达,而Mcc950预处理+H_2O_2损伤组细胞中NLRP3、Procaspase1依然保持高表达,但caspase1表达水平得到明显抑制,表明Mcc950能有效抑制NLRP3炎性小体的激活从而干扰具有细胞凋亡作用的成熟caspase1的产生。结论:Mcc950能够有效抑制H_2O_2诱导的NLRP3炎性小体激活,恢复细胞活力,抑制细胞凋亡。

阻塞型睡眠呼吸暂停低通气综合征对甲状腺功能的影响及机制研究

阻塞型睡眠呼吸暂停低通气综合征(OSAHS)是一种常见的疾病,可对生命质量、预期寿命、健康成本产生重要影响。由于OSAHS与睡眠中断、全身低度炎症以及氧化应激有关,OSAHS与内分泌系统之间存在的双向关系在实验和流行病学研究中越来越多地被认识到。近几年有越来越多关于OSAHS对内分泌功能影响的研究,包括肥胖、血糖异常、垂体、甲状腺、肾上腺、生殖系统和骨骼。该文章将重点阐述OSAHS对甲状腺功能的影响及相关影响机制。

Special AT-rich sequence-binding protein 1 promotes cell growth and metastasis in colorectal cancer

AIM: To evaluate the expression of special AT-rich sequence-binding protein 1 (SATB1 ) gene in colorectal cancer and its role in colorectal cancer cell proliferation and invasion.METHODS: Immunohistochemistry was used to detect the protein expression of SATB1 in 30 colorectal cancer (CRC) tissue samples and pair-matched adjacent nontumor samples. Cell growth was investigated after enhancing expression of SATB1. Wound-healing assay and Transwell assay were used to investigate the impact of SATB1 on migratory and invasive abilities of SW480 cells in vitro . Nude mice that received subcutaneous implantation or lateral tail vein were used to study the effects of SATB1 on tumor growth or metastasis in vivo . RESULTS: SATB1 was over-expressed in CRC tissues and CRC cell lines. SATB1 promotes cell proliferation and cell cycle progression in CRC SW480 cells. SATB1 over-expression could promote cell growth in vivo . In addition, SATB1 could significantly raise the ability of cell migration and invasion in vitro and promote the ability of tumor metastasis in vivo . SATB1 could up-regulate matrix metalloproteases 2, 9, cyclin D1 and vimentin, meanwhile SATB1 could down-regulate E-cadherin in CRC. CONCLUSION: SATB1 acts as a potential growth and metastasis promoter in CRC. SATB1 may be useful as a therapeutic target for CRC.

^(18)F-Fluorodeoxyglucose positron emission tomography/computed tomography comparison of gastric lymphoma and gastric carcinoma

AIM To compare ^(18)F-fluorodeoxyglucose positron emission tomography/computed tomography(^(18)F-FDG PET/CT) features in gastric lymphoma and gastric carcinoma.METHODS Patients with newly diagnosed gastric lymphoma or gastric carcinoma who underwent ^(18)F-FDG PET/CT prior to treatment were included in this study. We reviewed and analyzed the PET/CT features of gastric wall lesions,including FDG avidity,pattern(focal/diffuse),and intensity [maximal standard uptake value:(SUVmax)]. The correlation of SUVmax with gastricclinicopathological variables was investigated by χ~2 test,and receiver-operating characteristic(ROC) curve analysis was performed to determine the differential diagnostic value of SUVmax-associated parameters in gastric lymphoma and gastric carcinoma. RESULTS Fifty-two patients with gastric lymphoma and 73 with gastric carcinoma were included in this study. Abnormal gastric FDG accumulation was found in 49 patients(94.23%) with gastric lymphoma and 65 patients(89.04%) with gastric carcinoma. Gastric lymphoma patients predominantly presented with type Ⅰ and type Ⅱ lesions,whereas gastric carcinoma patients mainly had type Ⅲ lesions. The SUVmax(13.39 ± 9.24 vs 8.35 ± 5.80,P < 0.001) and SUVmax/THKmax(maximal thickness)(7.96 ± 4.02 vs 4.88 ± 3.32,P < 0.001) were both higher in patients with gastric lymphoma compared with gastric carcinoma. ROC curve analysis suggested a better performance of SUVmax/THKmax in the evaluation of gastric lesions between gastric lymphoma and gastric carcinoma in comparison with that of SUVmax alone.CONCLUSION PET/CT features differ between gastric lymphoma and carcinoma,which can improve PET/CT evaluation of gastric wall lesions and help differentiate gastric lymphoma from gastric carcinoma.

大连市某农村妇女高危型HPV持续感染的影响因素分析

目的探讨影响高危型人乳头瘤病毒(HPV)持续感染因素,旨在为降低高危型HPV持续感染和宫颈癌的发生提供参考依据。方法选取2015年1月—2015年12月大连市某农村35~64岁、宫颈完整且无宫颈癌病史,能理解研究程序且自愿参加HPV检测的2000例妇女完成宫颈癌筛查调查表。2017年度进行随访并且再次进行HPV筛查。结果2000例调查对象中,感染型别共有14种。其中,阳性191例(9.55%)。随访1432例调查对象,感染型别共有15种。其中,阳性151例(10.54%);141例感染高危型HPV,其中51例为持续感染高危型HPV(36.17%)。多因素Logistics回归结果显示,甲状腺疾病[Ol^R=3.500(95%CI:1.067,11.478)]和宫颈炎[Ol^R=2.721(95%CI:1.322,5.603)]是高危型HPV持续感染的危险因素。结论宫颈炎和甲状腺疾病是高危型HPV持续感染的危险因素,应采取针对性的防控措施,降低高危型HPV持续感染的发生。