mesenchymal–epithelial transition
Dotaz
Zobrazit nápovědu
Cíl studie: V reprodukčním období ženy dochází k opakovaným a častým strukturálním a funkčním proměnám endometria. Schopnost regenerace, remodelace a diferenciace je předpokladem receptivity endometria, implantace a vývoje embrya. Důležitým faktorem těchto procesů je vzájemná přeměna mezenchymálního a epiteliálního fenotypu endometriálních buněk – epiteliálně- -mezenchymální transice (EMT = epitelial-mesenchymal transition) a mezenchymálně-epiteliální transice (MET = mesenchymal-epithelial transition). Cílem práce je prezentovat současné poznatky o vzájemné přeměně epiteliálních a mezenchymální buněk děložní sliznice a jejich možném vlivu na poruchy plodnosti. Typ studie: Přehledová práce. Název a sídlo pracoviště: Gynekologicko-porodnická klinika Lékařské fakulty Masarykovy univerzity a FN Brno; Porodnicko-gynekologická klinika FN a LF UP Olomouc. Metodika: Literární rešerše databáze PubMed publikované do února 2019 s termíny zaměřenými na „endometrial receptivity“, „embryo implantation“, „endometrial regeneration“, „mesenchymal–epithelial transition/transformation“. Výsledky: Bylo prokázáno, že stromální buňky se podílejí na regeneraci nejen stromatu, ale také epitelu endometria. V průběhu decidualizace působením ovariálních steroidů a dalších faktorů probíhá MET, fibroblasty stromatu získávají postupně vlastnosti epiteliálních buněk – morfologicky i funkčně (sekreční endoplazmatické retikulum, pevné intercelulární spoje). V průběhu implantace embrya vlivem interakce trofoblastu s decidualizovaným endometriem dochází k přeměně epiteliálních buněk na mezenchymální (EMT), které jsou schopny migrace a regulace pronikajícího trofoblastu. Závěr: Vzájemná přeměna stromálních a epiteliálních buněk endometria je nezbytná pro fyziologickou funkci děložní sliznice včetně implantace a vývoje embrya.
Objective: During reproductive age of a woman, endometrium undergoes frequent stuctural and functional changes. Abilities of regeneration, remodelation and differentiation are precondition of endometrial receptivity and implantation and development of an embryo. These processes are conditioned by mutual transformation between mesenchymal and epithelial fenotype of endometrial cells: epithelial-mesenchymal transition (EMT) and mesenchymal-epithelial transition (MET). The aim of this study is to present contemporary knowledge of transformation between epithelial and mesenchymal endometrial cells and its influence on human fertility. Design: Review article. Setting: Department of Obstetrics and Gynecology, Faculty of Medicine, Masaryk university and University Hospital Brno; Department of Obstetrics and Gynecology, University Hospital Faculty of Medicine, Palacky University, Olomouc. Methods: PubMed was searched for articles in English indexed until February 2019 with terms of „endometrial receptivity“, „embryo implantation“, „endometrial regeneration“, „mesenchymal-epithelial transition/ transformation“. Results: It has been proved, that mesenchymal stromal cells participate on regeneration of not only the endometrial stroma, but also of the epithelium. During endometrial decidualisation under influence of ovarian steroids, the MET is under way. Stromal fibroblasts gain the morfological and functional properties of epithelial cells. During implantaion of an embryo, the trofoblast interacts with decidualised endometrium. Epithelial cells transform into mesenchymal (EMT), which mediate the growth of trofoblast. Conclusion: Mutual transformation between stromal and epithelial cells in essential for normal function of endometrium and implantation and development of an embryo.
- Klíčová slova
- mezenchymálněepiteliální transformace buněk, receptivita endometria, regenerace endometria,
- MeSH
- endometrium * fyziologie MeSH
- implantace embrya MeSH
- lidé MeSH
- Check Tag
- lidé MeSH
- ženské pohlaví MeSH
- Publikační typ
- práce podpořená grantem MeSH
- přehledy MeSH
Cystic fibrosis (CF) is a monogenetic disease resulting from mutations in the Cystic Fibrosis Transmembrane conductance Regulator (CFTR) gene encoding an anion channel. Recent evidence indicates that CFTR plays a role in other cellular processes, namely in development, cellular differentiation and wound healing. Accordingly, CFTR has been proposed to function as a tumour suppressor in a wide range of cancers. Along these lines, CF was recently suggested to be associated with epithelial-mesenchymal transition (EMT), a latent developmental process, which can be re-activated in fibrosis and cancer. However, it is unknown whether EMT is indeed active in CF and if EMT is triggered by dysfunctional CFTR itself or a consequence of secondary complications of CF. In this study, we investigated the occurrence of EMT in airways native tissue, primary cells and cell lines expressing mutant CFTR through the expression of epithelial and mesenchymal markers as well as EMT-associated transcription factors. Transepithelial electrical resistance, proliferation and regeneration rates, and cell resistance to TGF-β1induced EMT were also measured. CF tissues/cells expressing mutant CFTR displayed several signs of active EMT, namely: destructured epithelial proteins, defective cell junctions, increased levels of mesenchymal markers and EMT-associated transcription factors, hyper-proliferation and impaired wound healing. Importantly, we found evidence that the mutant CFTR triggered EMT was mediated by EMT-associated transcription factor TWIST1. Further, our data show that CF cells are over-sensitive to EMT but the CF EMT phenotype can be reversed by CFTR modulator drugs. Altogether, these results identify for the first time that EMT is intrinsically triggered by the absence of functional CFTR through a TWIST1 dependent mechanism and indicate that CFTR plays a direct role in EMT protection. This mechanistic link is a plausible explanation for the high incidence of fibrosis and cancer in CF, as well as for the role of CFTR as tumour suppressor protein.
- MeSH
- cystická fibróza metabolismus patologie MeSH
- epitelo-mezenchymální tranzice MeSH
- HEK293 buňky MeSH
- jaderné proteiny metabolismus MeSH
- kultivované buňky MeSH
- lidé MeSH
- onkogeny genetika MeSH
- protein CFTR metabolismus MeSH
- transkripční faktor Twist metabolismus MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
The cell surface glycoprotein Trop-2 is commonly overexpressed in carcinomas and represents an exceptional antigen for targeted therapy. Here, we provide evidence that surface Trop-2 expression is functionally connected with an epithelial phenotype in breast and prostate cell lines and in patient tumor samples. We further show that Trop-2 expression is suppressed epigenetically or through the action of epithelial-to-mesenchymal transition transcription factors and that deregulation of Trop-2 expression is linked with cancer progression and poor patient prognosis. Moreover, our data suggest that the cancer plasticity-driven intratumoral heterogeneity in Trop-2 expression may significantly contribute to response and resistance to therapies targeting Trop-2-expressing cells.
- MeSH
- antigeny nádorové genetika metabolismus MeSH
- CD antigeny biosyntéza MeSH
- epitelo-mezenchymální tranzice fyziologie MeSH
- epitelové buňky metabolismus MeSH
- kadheriny biosyntéza MeSH
- karcinom patologie MeSH
- lidé MeSH
- metylace DNA genetika MeSH
- molekuly buněčné adheze genetika metabolismus MeSH
- myši inbrední BALB C MeSH
- myši MeSH
- nádorové buněčné linie MeSH
- nádory prostaty mortalita patologie MeSH
- nádory prsu mortalita patologie MeSH
- progrese nemoci MeSH
- xenogenní modely - testy protinádorové aktivity MeSH
- zvířata MeSH
- Check Tag
- lidé MeSH
- mužské pohlaví MeSH
- myši MeSH
- ženské pohlaví MeSH
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
SIGNIFICANCE: Machine learning is increasingly being applied to the classification of microscopic data. In order to detect some complex and dynamic cellular processes, time-resolved live-cell imaging might be necessary. Incorporating the temporal information into the classification process may allow for a better and more specific classification. AIM: We propose a methodology for cell classification based on the time-lapse quantitative phase images (QPIs) gained by digital holographic microscopy (DHM) with the goal of increasing performance of classification of dynamic cellular processes. APPROACH: The methodology was demonstrated by studying epithelial-mesenchymal transition (EMT) which entails major and distinct time-dependent morphological changes. The time-lapse QPIs of EMT were obtained over a 48-h period and specific novel features representing the dynamic cell behavior were extracted. The two distinct end-state phenotypes were classified by several supervised machine learning algorithms and the results were compared with the classification performed on single-time-point images. RESULTS: In comparison to the single-time-point approach, our data suggest the incorporation of temporal information into the classification of cell phenotypes during EMT improves performance by nearly 9% in terms of accuracy, and further indicate the potential of DHM to monitor cellular morphological changes. CONCLUSIONS: Proposed approach based on the time-lapse images gained by DHM could improve the monitoring of live cell behavior in an automated fashion and could be further developed into a tool for high-throughput automated analysis of unique cell behavior.
TGFβ has roles in inflammation, wound healing, epithelial to mesenchymal transition (EMT), and cancer stem cell states, and acts as a tumor suppressor gene for squamous cell carcinoma (SCC). SCCs are also characterized by high levels of ΔNp63, which induces epithelial cell phenotypes and maintains squamous stem cells. Previous studies indicate a complex interplay between ΔNp63 and TGFβ signaling, with contradictory effects reported. We investigated the effects of TGFβ on p63 isoform proteins and mRNAs in non-malignant squamous and SCC cells, and the role of either canonical or non-canonical TGFβ signaling pathways. TGFβ selectively increased ΔNp63 protein levels in non-malignant keratinocytes in association with SMAD3 activation and was prevented by TGFβ receptor inhibition, indicating activation of canonical TGFβ pathway signaling. TP63 isoform mRNAs showed discordance from protein levels, with an initial increase in both TAP63 and ΔNP63 mRNAs followed by a decrease at later times. These data demonstrate complex and heterogeneous effects of TGFβ in squamous cells that depend on the extent of canonical TGFβ pathway aberrations. The interplay between TGFβ and p63 is likely to influence the magnitude of EMT states in SCC, with clinical implications for tumor progression and response to therapy.
Lower respiratory tract infection due to Pseudomonas aeruginosa has become increasingly challenging, resulting in a worse morbidity and mortality. Airway remodeling is a common phenomenon in this process, to which epithelial-mesenchymal transition (EMT) may contribute as an important promoter. Previous studies showed that epithelium-specific integrin αvβ6-mediated EMT was involved in pulmonary fibrosis via transforming growth factor-β1 (TGF-β1) signaling, but whether integrin αvβ6 plays a role in the P. aeruginosa-associated airway remodeling remains unknown. BEAS-2B cells were incubated with lipopolysaccharide (LPS) from P. aeruginosa in the presence or the absence of integrin αvβ6-blocking antibodies. Morphologic changes were observed by an inverted microscopy. The EMT markers were detected using Western blotting and immunofluorescence. The activation of TGF-β1-Smad2/3 signaling pathway was assessed. Furthermore, matrix metalloproteinase (MMP)-2 and -9 in the medium were measured using ELISA. P. aeruginosa's LPS decreased the expression of the epithelial marker E-cadherin and promoted the mesenchymal markers, vimentin and α-smooth muscle actin in BEAS-2B cells. The expression of integrin αvβ6 was significantly increased during EMT process. Blocking integrin αvβ6 could attenuate P. aeruginosa's LPS-induced EMT markers' expression via TGF-β1-Smad2/3 signaling pathway. Furthermore, blocking integrin αvβ6 could prevent morphologic changes and oversecretion of MMP-2 and -9. Integrin αvβ6 mediates epithelial-mesenchymal transition in human bronchial epithelial cells induced by lipopolysaccharides of P. aeruginosa via TGF-β1-Smad2/3 signaling pathway and might be a promising therapeutic target for P. aeruginosa-associated airway remodeling.
- MeSH
- antigeny nádorové genetika metabolismus MeSH
- epitelo-mezenchymální tranzice * MeSH
- epitelové buňky cytologie účinky léků metabolismus MeSH
- integriny genetika metabolismus MeSH
- lidé MeSH
- lipopolysacharidy metabolismus MeSH
- matrixové metaloproteinasy genetika metabolismus MeSH
- protein Smad2 genetika metabolismus MeSH
- protein Smad3 genetika metabolismus MeSH
- pseudomonádové infekce genetika metabolismus mikrobiologie patofyziologie MeSH
- Pseudomonas aeruginosa metabolismus MeSH
- signální transdukce MeSH
- transformující růstový faktor beta1 genetika metabolismus MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- časopisecké články MeSH
BACKGROUND: During cancer progression, epithelial cancer cells can be reprogrammed into mesenchymal-like cells with increased migratory potential through the process of epithelial-mesenchymal transition (EMT), representing an essential step of tumor progression towards metastatic state. AGR2 protein was shown to regulate several cancer-associated processes including cellular proliferation, survival and drug resistance. METHODS: The expression of AGR2 was analyzed in cancer cell lines exposed to TGF-β alone or to combined treatment with TGF-β and the Erk1/2 inhibitor PD98059 or the TGF-β receptor specific inhibitor SB431542. The impact of AGR2 silencing by specific siRNAs or CRISPR/Cas9 technology on EMT was investigated by western blot analysis, quantitative PCR, immunofluorescence analysis, real-time invasion assay and adhesion assay. RESULTS: Induction of EMT was associated with decreased AGR2 along with changes in cellular morphology, actin reorganization, inhibition of E-cadherin and induction of the mesenchymal markers vimentin and N-cadherin in various cancer cell lines. Conversely, induction of AGR2 caused reversion of the mesenchymal phenotype back to the epithelial phenotype and re-acquisition of epithelial markers. Activated Smad and Erk signaling cascades were identified as mutually complementary pathways responsible for TGF-β-mediated inhibition of AGR2. CONCLUSION: Taken together our results highlight a crucial role for AGR2 in maintaining the epithelial phenotype by preventing the activation of key factors involved in the process of EMT.
- MeSH
- buněčná adheze genetika MeSH
- epitelo-mezenchymální tranzice účinky léků genetika MeSH
- genový knockdown MeSH
- kadheriny metabolismus MeSH
- lidé MeSH
- nádorové buněčné linie MeSH
- pohyb buněk genetika MeSH
- proteiny Smad metabolismus MeSH
- proteiny genetika MeSH
- regulace genové exprese u nádorů účinky léků MeSH
- signální transdukce účinky léků MeSH
- transformující růstový faktor beta farmakologie MeSH
- vimentin metabolismus MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- časopisecké články MeSH
Benzimidazole anthelmintics flubendazole and mebendazole are microtubule-targeting drugs that showed considerable anti-cancer activity in different preclinical models. In this study, the effects of flubendazole and mebendazole on proliferation, migration and cadherin switching were studied in a panel of oral cell lines in vitro. Both compounds reduced the viability of the PE/CA-PJ15 and H376 oral squamous carcinoma cells and of the premalignant oral keratinocytes DOK with the IC50 values in the range of 0.19-0.26 μM. Normal oral keratinocytes and normal gingival fibroblasts were less sensitive to the treatment. Flubendazole and mebendazole also reduced the migration of the PE/CA-PJ15 cell in concentrations that had no anti-migratory effects on the normal gingival fibroblasts. Levels of the focal adhesion kinase FAK, Rho-A and Rac1 GTPases and the Rho guanine nucleotide exchange factor GEF-H1 were decreased in both PE/CA-PJ15 cells and gingival fibroblasts following treatment. Both drugs also interfered with cadherin switching in the model of TGF-β-induced epithelial to mesenchymal transition (EMT) in the DOK cell line. Levels of N-cadherin were reduced in the TGF-β induced cells co-treated with flubendazol and mebendazole in very low concentration (50 nM). These results suggest direct effects of both benzimidazoles on selected processes of EMT in oral cell lines such as cadherin switching as well as cellular migration.
- MeSH
- buněčné linie MeSH
- cdc42 protein vázající GTP metabolismus MeSH
- epitelo-mezenchymální tranzice účinky léků MeSH
- fokální adhezní kinasa 1 metabolismus MeSH
- kadheriny metabolismus MeSH
- lidé MeSH
- mebendazol analogy a deriváty farmakologie MeSH
- nádory úst metabolismus patologie MeSH
- pohyb buněk účinky léků MeSH
- proliferace buněk účinky léků MeSH
- rhoA protein vázající GTP metabolismus MeSH
- spinocelulární karcinom metabolismus patologie MeSH
- transformující růstový faktor beta farmakologie MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- časopisecké články MeSH
Metastatic disease is the leading cause of death due to prostate cancer (PCa). Although the hypermethylated in cancer 1 (HIC1) gene has been observed to be epigenetically modified in PCa, its intrinsic role and mechanism in PCa metastasis still remain uncertain. Here, we show that hypermethylation of the HIC1 promoter markedly reduces its suppressive function in metastatic PCa tissues as compared with primary and adjacent normal prostate tissues, and is associated with poor patient survival. PCas in cancer-prone mice homozygous for a prostate-targeted Hic1 conditional knockout showed stronger metastatic behaviour than those in heterozygous mice, as a result of epithelial-mesenchymal transition (EMT). Moreover, impairment of HIC1 expression in PCa cells induced their migration and metastasis through EMT, by enhancing expression of Slug and CXCR4, both of which are critical to PCa metastasis; the CXCL12-CXCR4 axis promotes EMT by activating the extracellular signal-regulated kinase (ERK) 1/2 pathway. Taken together, our results suggest that evaluation of HIC1-CXCR4-Slug signalling may provide a potential predictor for PCa aggressiveness. Copyright © 2017 Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.
- MeSH
- chemokin CXCL12 metabolismus MeSH
- DNA nádorová genetika MeSH
- epitelo-mezenchymální tranzice genetika MeSH
- Kaplanův-Meierův odhad MeSH
- lidé MeSH
- metastázy nádorů MeSH
- metylace DNA MeSH
- myši inbrední C57BL MeSH
- myši knockoutované MeSH
- nádorové buňky kultivované MeSH
- nádorové proteiny genetika metabolismus MeSH
- nádory prostaty genetika metabolismus patologie MeSH
- prognóza MeSH
- promotorové oblasti (genetika) MeSH
- receptory CXCR4 metabolismus MeSH
- regulace genové exprese u nádorů genetika MeSH
- rodina transkripčních faktorů Snail genetika fyziologie MeSH
- signální transdukce fyziologie MeSH
- transkripční faktory Krüppel-like nedostatek genetika metabolismus MeSH
- zvířata MeSH
- Check Tag
- lidé MeSH
- mužské pohlaví MeSH
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
Východiska: Triple-negativní karcinomy prsu (TNBC) jsou heterogenní skupinou nádorů s převážně agresivním chováním a špatnou prognózou. V souvislosti s jejich agresivním chováním a chemorezistencí vůči léčbě se do popředí dostal koncept epitelo-mezenchymové tranzice (EMT). Proteiny CD9 a CD29 jsou spojeny s EMT a mohou hrát roli v progresi TNBC. Naším cílem bylo prozkoumat asociaci těchto markerů s metastázami do lymfatických uzlin, gradingem tumoru, proliferační aktivitou a přežitím pacientů. Pacienti a metody: Náš soubor tvořilo 66 pacientek s TNBC bez neoadjuvantní terapie ve věku 26–81 let. Patologické stadium nádoru se pohybovalo od pT1b do pT3 a histologický stupeň od II do III podle systému Bloom-Richardson. Imunohistochemické hodnocení exprese CD9, CD29, E-cadherinu, vimentinu, androgenového receptoru a Ki-67 bylo provedeno semikvantitativně pomocí H-skóre. Exprese proteinů byla statisticky hodnocena ve vztahu ke klinicko-patologickým parametrům a přežití pacientů. Výsledky: Pozorovali jsme nižší expresi CD9 v metastázách lymfatických uzlin ve srovnání s primárním nádorem (p = 0,021). Exprese CD29 v primárním nádoru byla signifikantně nižší u pacientů s metastázami v lymfatických uzlinách ve srovnání s pacienty bez diseminace (p = 0,03). Ani exprese CD9 ani CD29 proteinu nebyla spojena s přežitím specifickým pro karcinom prsu (BCSS). Nižší exprese E-cadherinu na periferii primárního tumoru byla spojena s horším BCSS (p = 0,038). Pro grading ani přítomnost metastáz v lymfatických uzlinách nebyl nalezen signifikantní vztah s BCSS. Nižší exprese E-cadherinu na periferii byla také spojena s vyšší hladinou Ki67 (Rs −0,26) a vimentinu (Rs −0,33). Závěr: Snížená exprese proteinů CD9 a CD29 byla spojena s růstem metastáz v lymfatických uzlinách, avšak jejich souvislost s přežitím nebyla prokázána. Nižší exprese E-cadherinu na periferii primárního nádoru byla spojena s vysokou proliferací a špatným nádorově specifickým přežitím.
Background: Triple-negative breast carcinomas (TNBC) are a heterogeneous group of tumors with mostly aggressive behaviour and poor prognosis. In association with their aggressive behavior and chemoresistance to treatment, the concept of epithelial-mesenchymal transition (EMT) has come to the fore. CD9 and CD29 proteins are associated with EMT and may play a role in TNBC progression. Our aim was to investigate association of these markers with the lymph node metastasis, tumor grade, proliferative activity, and patient survival. Patients and methods: Our cohort consisted of 66 TNBC patients without neoadjuvant therapy, aged 26–81 years. The pathological tumor stages ranged from pT1b to pT3 and histological grades ranged from II to III, according to the Bloom-Richardson system. Immunohistochemical evaluation of CD9, CD29, E-cadherin, vimentin, androgen receptor and Ki-67 expression was performed semiquantitatively using the H-score. Expression of the proteins was statistically evaluated in relation to the clinicopathological parameters and survival of the patients. Results: We observed lower expression of CD9 in lymph node metastases compared to the primary tumor (P = 0.021). The CD29 expression in primary tumor was significantly lower in patients with lymph node metastases compared to patients without cancer dissemination (P = 0.03). Neither CD9 nor CD29 protein expression was associated with breast cancer-specific survival (BCSS). Lower expression of E-cadherin at the periphery of the primary tumor was associated with worse BCSS (P = 0.038). Neither grade nor the presence of lymph node metastases reached significant association with the BCSS. Lower expression of E-cadherin at the periphery was also associated with higher Ki67 (Rs −0.26) and vimentin (Rs −0.33). Conclusion: Decreased protein expression of CD9 and CD29 were associated with lymph node metastasis growth, however, their association with survival was not proved. Lower expression of E-cadherin at the periphery of the primary tumor was associated with high proliferation and poor breast cancer-specific survival.
- MeSH
- antigeny CD29 analýza MeSH
- antigeny CD9 analýza MeSH
- epitelo-mezenchymální tranzice imunologie MeSH
- imunohistochemie * metody MeSH
- kadheriny analýza MeSH
- kohortové studie MeSH
- lidé MeSH
- lymfatické metastázy diagnostické zobrazování imunologie MeSH
- prognóza MeSH
- triple-negativní karcinom prsu * diagnostické zobrazování imunologie sekundární MeSH
- Check Tag
- lidé MeSH
- ženské pohlaví MeSH
