ABSTRACT
Objective Todeterminetherelationshipbetweenthetumorvolumeoftheperipherallungadenocarcinomawith maximum diameter≤3cmandlymphnodemetastasis(LNM).Methods TheMSCTmanifestationsof235subjectswhowerediagnosedasperipheral lungadenocarcinomawithmaximumdiameter≤3cm wereretrospectivelyanalyzed.Thesepatientsweregroupedaccordingtodifferent parametersincludingsmokinghistory,differentiation,tumorconsistencyandavailabilityoftumornecrosis.Tumorvolumeandratesof LNMamongthesegroupswerecompared.ROCanalysiswasusedtocalculatethecut-offvalueanddiagnosticaccuracy.Results (1) ThetumorvolumeofLNMgroupwaslargerthanthatofnoLNMgroup,cut-offvaluewas5.5cm3,andAUCwas0.76;(2)Therates ofLNMofthewell,moderate-well,moderate,moderate-poorandpoordifferentiationgroupswere0%,8.7%,17.7%,45.6%and46.7%respectively.Theratesofpuregroundglassopacity(p-GGO),mixedandsolidtumorwere0%,8.3%and29.3%respectively.The ratesofthetumorpresentandabsentofnecrosiswere47.8%,22.0%respectively(P＜0.05).Conclusion Usingthevolumeoftumor on MSCTtopredictLNMisanewnon-invasivewayofassessingLNM,withhighsensitivityandspecificity,whichcouldsupplymore imaginginformationforsurgeonstochoosethewayoflymphnodedissection.
ABSTRACT
Objective ToinvestigatethecorrelationbetweenCTimagingfindingsoflungadenocarcinomaandepidermalgrowth factorreceptor(EGFR)genemutation.Methods Theclinicaldataof150lungadenocarcinomapatientsinthehospitalfrom October 2015toOctober2017werecollectedretrospectively.AccordingtotheEGFRgenemutation,thepatientsweredividedintononeffectivemutation group (n=78)andeffective mutationgroup (n=72).Univariateanalysisand multivariate L o g istic regression modelwereperformed toexplorethepredictionsignsofeffectiveEGFRgenemutationinlungadenocarcinoma.Results Univariateanalysisshowedthatthe proportionsoffemalepatients,smokinghistory,CTfindingsofspiculesign,necroticsign,pleuralindentationandnonfibrosisin theeffectivemutationgroupweresignificantlyhigherthanthoseinnoneffectivemutationgroup(P<0.05).However,therewereno significantdifferencesbetweenthesetwogroupsinage,diameteroflesions,locationoflesions,densityoflesions,lobulatedsign, cavitation sign ,air bronchogram and pleuralthickening sign (P>0 .05 ).M ultivariate L o g istic regression analysis showed thatfemale (OR=2.612),spiculesign(OR=2.476),necroticsign(OR=2.846),pleuralindentation(OR=2.221)andnonfibrosis(OR=2.476)were independentpredictorsofeffectiveEGFRgenemutationinlungadenocarcinoma(P<0.05).Conclusion FemaleandlungadenocarcinomaCT findingsofspiculesign,necroticsign,pleuralindentationandnonfibrosisarerelatedtoEGFRgenemutation,whichisofgreatsignificanceto distinguishingwildtypefrom mutanttypeofEGFRgeneandguidingtheclinicaltreatment.
ABSTRACT
Objective Toimprovethepreoperativediagnosisoflungadenocarcinomaaccordingtotherelationshipbetweenthevisceralpleural invasion(VPI)andtheCTfeatures.Methods TheCTfeaturesandthepathologicalmanifestationsof351lungadenocarcinomasconfirmedby surgicalpathologywereretrospectivelyanalyzed.TworadiologistsindependentlyevaluatedtheCTfeatures,includingthelocationand maximumdiameterofthelesion,theminimumdistancefromthelesiontothepleura(DLP)inthree-dimensionalreconstructionimageandthe relationofthelesiontotheadjacentpleura(RAP).TheRAPwasdescribedas5types:(1)nocontactofthethelesionwiththepleura,(2)aline betweenthelesionandthepleurawithoutretractionoftheinvolvedpleura,(3)thelesiontightlyclosedtothepleurawithouttypical pleuraretraction,(4)oneormorelinearstrandsradiatedfromthelesiontothepleuralsurfacewithpleuralretraction,(5)broadcontactofthe lesionandpleurawiththecontactsurfaceoflesionover50% withpleuralretraction.Anexperiencedpathologistevaluatedthehistopathological patternsaccordingtothe7thEditionoftheTNMclassificationforlungcancer(PL0-PL2).AndthePL1andPL2weredescribed as VPI (+)group ,meanwhile the PL0 was as the VPI (-)group .Univariate analysis such as t test,χ 2 or One-W ay analysis of variance was performedtoidentifytheindependentpredictorsinpredictingVPI.Results Significantdifferenceswerefoundinpatientage,lesionlocation, maximumdiameter,andRAPbetweenVPI(+)andVPI(-)groups(P<0.05).Conclusion Whenthepatientwithlungadenocarcinomais over60yearsold,withthelesiondiameterover2.3cm,thepossibilityofvisceralpleuralinvasionwillbeconsideredaccordingtothe relationshipofthelesionandtheadjacentpleura(abuttingpleuralorpleuralindentation).
ABSTRACT
To investigate the mechanism of 17β-estradiol (E2) induced tumor angiogenesis by VEGFα in the microenvironment of lung adenocarcinoma in A549 cells. Methods A549 cells were divided into three groups; PBS group, 10 nmol L"1 E2 group and 10 nmol L"1 E2 +5 (xmol L"1 estrogen receptor antagonist (ICI) group. Western blot was used to detect the expression of VEGFα in A549 cells, and ELISA was used to detect the expression of VEGFα in culture medium. The proliferation of human umbilical vein endothelial cells (HUVECs) was detected by MTT, the migration ability of HUVECs by scratch assay and the tubulogenesis in vitro by tube formation assay. Results Compared with control group, the expression of VEGFα in A549 cells in E2 group was higher, but the expression of VEGFα in A549 cells was significantly inhibited with the addition of ICI. Meanwhile, E2 induced the expression of VEGFα in A549 cells, promoting proliferation, migration and tubulogenesis of HUVEC, while ICI had the opposite effects. Conclusions E2 stimulates the expression of VEGFα by binding to estrogen receptor in A549 cells, promoting proliferation, migration and tube formation of HUVECs, contributing to lung adenocarcinoma angiogenesis.
ABSTRACT
AIM:Toinvestigatetheassociationbetweenmethylationstatusofapoptosis-relatedgenesandche-mosensitivity in the lung adenocarcinoma cell line P 15.METHODS: Methylation-specific PCR was applied to detect the methylation status of p73, p14ARF, p16INK4a and bax genes of P15 cells in untreated control group and decitabine (DAC) treatment group.RT-PCR was used to detect the expression of p 73, bcl-xL, bad, bax, p14ARF and p16INK4a at mRNA level. Colony formation assay and cell growth inhibition assay were used to detect the sensitivity of P 15 cells to cis-diaminedichlo-roplatinum ( C-DDP) before and after DAC treatment .DAPI staining was used to determine the apoptosis of P 15 cells ex-posed to C-DDP before and after DAC treatment .RESULTS:p73, p16INK4a and bax were expressed in the methylation sta-tus.After DAC treatment, p16INK4a expression was decreased , and the expression of p73 and bax disappeared .The expres-sion of p73, p16INK4a and bax in the unmethylated status was weak , but the enhanced expression was observed following DAC treatment.After P15 cells were treated with DAC and C-DDP, the colony formation rate of the P15 cells was signifi-cantly decreased as compared with untreated control group .The apoptotic P15 cells in DAC+C-DDP treatment group were significantly higher than those in untreated control group (P<0.05).CONCLUSION:After treated with DAC, the sensi-tivity of P15 cells to C-DDP is increased due to the activation of silenced pro-apoptotic genes .DAC and C-DDP synergisti-cally promote tumor cell apoptosis .They have significant anti-tumor effect .
ABSTRACT
Objective:Toinvestigate the influence of MMP7 antisense oligodeoxynucleotide(ASODN)on adhesion and invasion ofhuman lung adenocarcinoma cell line A549.Methods:Phosphorothioate MMP7 ASODN was transfected to A549 cells mediated by liposome. The expression of MMP7 was examined by RT-PCR.The adhesive and invasive ability were examined by plate adhesion model and Boyden Chamber transwell assay.Results:After MMP7 ASODN was transfected,the relative optical density(ROD)of electrophoresis strip was decreased obviously(P