메뉴 건너뛰기




Volumn 2, Issue 11, 2014, Pages

Circulating tumor cells and epithelial, mesenchymal and stemness markers: Characterization of cell subpopulations

Author keywords

Circulating tumor cells (CTCs); Epithelial mesenchymal transition (EMT); Stemness

Indexed keywords


EID: 85015498607     PISSN: 23055839     EISSN: 23055847     Source Type: Journal    
DOI: 10.3978/j.issn.2305-5839.2014.10.04     Document Type: Review
Times cited : (124)

References (50)
  • 1
    • 0344845003 scopus 로고    scopus 로고
    • Epithelial-mesenchymal transitions in development and pathologies
    • Thiery JP. Epithelial-mesenchymal transitions in development and pathologies. Curr Opin Cell Biol 2003;15:740-6.
    • (2003) Curr Opin Cell Biol , vol.15 , pp. 740-746
    • Thiery, J.P.1
  • 2
    • 77954860342 scopus 로고    scopus 로고
    • Epithelial-mesenchymal transition in cancer: parallels between normal development and tumor progression
    • Micalizzi DS, Farabaugh SM, Ford HL. Epithelial-mesenchymal transition in cancer: parallels between normal development and tumor progression. J Mammary Gland Biol Neoplasia 2010;15:117-34.
    • (2010) J Mammary Gland Biol Neoplasia , vol.15 , pp. 117-134
    • Micalizzi, D.S.1    Farabaugh, S.M.2    Ford, H.L.3
  • 3
    • 0035499267 scopus 로고    scopus 로고
    • Stem cells, cancer, and cancer stem cells
    • Reya T, Morrison SJ, Clarke MF, et al. Stem cells, cancer, and cancer stem cells. Nature 2001;414:105-11.
    • (2001) Nature , vol.414 , pp. 105-111
    • Reya, T.1    Morrison, S.J.2    Clarke, M.F.3
  • 4
    • 0028350104 scopus 로고
    • Ep-CAM: a human epithelial antigen is a homophilic cell-cell adhesion molecule
    • Litvinov SV, Velders MP, Bakker HA, et al. Ep-CAM: a human epithelial antigen is a homophilic cell-cell adhesion molecule. J Cell Biol 1994;125:437-46.
    • (1994) J Cell Biol , vol.125 , pp. 437-446
    • Litvinov, S.V.1    Velders, M.P.2    Bakker, H.A.3
  • 5
    • 58549113573 scopus 로고    scopus 로고
    • Anti-epithelial cell adhesion molecule antibodies and the detection of circulating normal-like breast tumor cells
    • Sieuwerts AM, Kraan J, Bolt J, et al. Anti-epithelial cell adhesion molecule antibodies and the detection of circulating normal-like breast tumor cells. J Natl Cancer Inst 2009;101:61-6.
    • (2009) J Natl Cancer Inst , vol.101 , pp. 61-66
    • Sieuwerts, A.M.1    Kraan, J.2    Bolt, J.3
  • 6
    • 24644451986 scopus 로고    scopus 로고
    • Expression of epithelial cell adhesion molecule in carcinoma cells present in blood and primary and metastatic tumors
    • Rao CG, Chianese D, Doyle GV, et al. Expression of epithelial cell adhesion molecule in carcinoma cells present in blood and primary and metastatic tumors. Int J Oncol 2005;27:49-57.
    • (2005) Int J Oncol , vol.27 , pp. 49-57
    • Rao, C.G.1    Chianese, D.2    Doyle, G.V.3
  • 7
    • 84899491673 scopus 로고    scopus 로고
    • Heterogeneous atypical cell populations are present in blood of metastatic breast cancer patients
    • Lustberg MB, Balasubramanian P, Miller B, et al. Heterogeneous atypical cell populations are present in blood of metastatic breast cancer patients. Breast Cancer Res 2014;16:R23.
    • (2014) Breast Cancer Res , vol.16
    • Lustberg, M.B.1    Balasubramanian, P.2    Miller, B.3
  • 8
    • 84888287469 scopus 로고    scopus 로고
    • Gene of the month: E-cadherin (CDH1)
    • Gall TM, Frampton AE. Gene of the month: E-cadherin (CDH1). J Clin Pathol 2013;66:928-32.
    • (2013) J Clin Pathol , vol.66 , pp. 928-932
    • Gall, T.M.1    Frampton, A.E.2
  • 9
    • 5444230567 scopus 로고    scopus 로고
    • Transcriptional regulation of cadherins during development and carcinogenesis
    • Peinado H, Portillo F, Cano A. Transcriptional regulation of cadherins during development and carcinogenesis. Int J Dev Biol 2004;48:365-75.
    • (2004) Int J Dev Biol , vol.48 , pp. 365-375
    • Peinado, H.1    Portillo, F.2    Cano, A.3
  • 10
    • 0038756636 scopus 로고    scopus 로고
    • Transforming growth factor beta-1 induces snail transcription factor in epithelial cell lines: mechanisms for epithelial mesenchymal transitions
    • Peinado H, Quintanilla M, Cano A. Transforming growth factor beta-1 induces snail transcription factor in epithelial cell lines: mechanisms for epithelial mesenchymal transitions. J Biol Chem 2003;278:21113-23.
    • (2003) J Biol Chem , vol.278 , pp. 21113-21123
    • Peinado, H.1    Quintanilla, M.2    Cano, A.3
  • 11
    • 33244463813 scopus 로고    scopus 로고
    • Complex networks orchestrate epithelial-mesenchymal transitions
    • Thiery JP, Sleeman JP. Complex networks orchestrate epithelial-mesenchymal transitions. Nat Rev Mol Cell Biol 2006;7:131-42.
    • (2006) Nat Rev Mol Cell Biol , vol.7 , pp. 131-142
    • Thiery, J.P.1    Sleeman, J.P.2
  • 12
    • 84857097186 scopus 로고    scopus 로고
    • Changes in keratin expression during metastatic progression of breast cancer: impact on the detection of circulating tumor cells
    • Joosse SA, Hannemann J, Spötter J, et al. Changes in keratin expression during metastatic progression of breast cancer: impact on the detection of circulating tumor cells. Clin Cancer Res 2012;18:993-1003.
    • (2012) Clin Cancer Res , vol.18 , pp. 993-1003
    • Joosse, S.A.1    Hannemann, J.2    Spötter, J.3
  • 13
    • 77956262480 scopus 로고    scopus 로고
    • Molecular characterization of TGFbeta-induced epithelial-mesenchymal transition in normal finite lifespan human mammary epithelial cells
    • Lindley LE, Briegel KJ. Molecular characterization of TGFbeta-induced epithelial-mesenchymal transition in normal finite lifespan human mammary epithelial cells. Biochem Biophys Res Commun 2010;399:659-64.
    • (2010) Biochem Biophys Res Commun , vol.399 , pp. 659-664
    • Lindley, L.E.1    Briegel, K.J.2
  • 14
    • 7244219999 scopus 로고    scopus 로고
    • Establishment and characterization of cultured epithelial cells lacking expression of ZO-1
    • Umeda K, Matsui T, Nakayama M, et al. Establishment and characterization of cultured epithelial cells lacking expression of ZO-1. J Biol Chem 2004;279:44785-94.
    • (2004) J Biol Chem , vol.279 , pp. 44785-44794
    • Umeda, K.1    Matsui, T.2    Nakayama, M.3
  • 15
    • 84880044601 scopus 로고    scopus 로고
    • Tight junction proteins: from barrier to tumorigenesis
    • Runkle EA, Mu D. Tight junction proteins: from barrier to tumorigenesis. Cancer Lett 2013;337:41-8.
    • (2013) Cancer Lett , vol.337 , pp. 41-48
    • Runkle, E.A.1    Mu, D.2
  • 16
    • 77950552549 scopus 로고    scopus 로고
    • The epithelial splicing factors ESRP1 and ESRP2 positively and negatively regulate diverse types of alternative splicing events
    • Warzecha CC, Shen S, Xing Y, et al. The epithelial splicing factors ESRP1 and ESRP2 positively and negatively regulate diverse types of alternative splicing events. RNA Biol 2009;6:546-62.
    • (2009) RNA Biol , vol.6 , pp. 546-562
    • Warzecha, C.C.1    Shen, S.2    Xing, Y.3
  • 17
    • 84866320228 scopus 로고    scopus 로고
    • Complex changes in alternative pre-mRNA splicing play a central role in the epithelial-to-mesenchymal transition (EMT)
    • Warzecha CC, Carstens RP. Complex changes in alternative pre-mRNA splicing play a central role in the epithelial-to-mesenchymal transition (EMT). Semin Cancer Biol 2012;22:417-27.
    • (2012) Semin Cancer Biol , vol.22 , pp. 417-427
    • Warzecha, C.C.1    Carstens, R.P.2
  • 18
    • 32044467372 scopus 로고    scopus 로고
    • Fox-2 mediates epithelial cell-specific fibroblast growth factor receptor 2 exon choice
    • Baraniak AP, Chen JR, Garcia-Blanco MA. Fox-2 mediates epithelial cell-specific fibroblast growth factor receptor 2 exon choice. Mol Cell Biol 2006;26:1209-22.
    • (2006) Mol Cell Biol , vol.26 , pp. 1209-1222
    • Baraniak, A.P.1    Chen, J.R.2    Garcia-Blanco, M.A.3
  • 19
    • 37549039473 scopus 로고    scopus 로고
    • Heterogeneous ribonucleoprotein m is a splicing regulatory protein that can enhance or silence splicing of alternatively spliced exons
    • Hovhannisyan RH, Carstens RP. Heterogeneous ribonucleoprotein m is a splicing regulatory protein that can enhance or silence splicing of alternatively spliced exons. J Biol Chem 2007;282:36265-74.
    • (2007) J Biol Chem , vol.282 , pp. 36265-36274
    • Hovhannisyan, R.H.1    Carstens, R.P.2
  • 20
    • 2342556584 scopus 로고    scopus 로고
    • Cadherin switch in tumor progression
    • Hazan RB, Qiao R, Keren R, et al. Cadherin switch in tumor progression. Ann N Y Acad Sci 2004;1014:155-63.
    • (2004) Ann N Y Acad Sci , vol.1014 , pp. 155-163
    • Hazan, R.B.1    Qiao, R.2    Keren, R.3
  • 21
    • 84860386979 scopus 로고    scopus 로고
    • Role of E-cadherin and other cell adhesion molecules in survival and differentiation of human pluripotent stem cells
    • Li L, Bennett SA, Wang L. Role of E-cadherin and other cell adhesion molecules in survival and differentiation of human pluripotent stem cells. Cell Adh Migr 2012;6:59-70.
    • (2012) Cell Adh Migr , vol.6 , pp. 59-70
    • Li, L.1    Bennett, S.A.2    Wang, L.3
  • 22
    • 84885424897 scopus 로고    scopus 로고
    • Twist: a molecular target in cancer therapeutics
    • Khan MA, Chen HC, Zhang D, et al. Twist: a molecular target in cancer therapeutics. Tumour Biol 2013;34:2497-506.
    • (2013) Tumour Biol , vol.34 , pp. 2497-2506
    • Khan, M.A.1    Chen, H.C.2    Zhang, D.3
  • 23
    • 80052267874 scopus 로고    scopus 로고
    • Vimentin in cancer and its potential as a molecular target for cancer therapy
    • Satelli A, Li S. Vimentin in cancer and its potential as a molecular target for cancer therapy. Cell Mol Life Sci 2011;68:3033-46.
    • (2011) Cell Mol Life Sci , vol.68 , pp. 3033-3046
    • Satelli, A.1    Li, S.2
  • 24
    • 77953228964 scopus 로고    scopus 로고
    • TWISTing an embryonic transcription factor into an oncoprotein
    • Ansieau S, Morel AP, Hinkal G, et al. TWISTing an embryonic transcription factor into an oncoprotein. Oncogene 2010;29:3173-84.
    • (2010) Oncogene , vol.29 , pp. 3173-3184
    • Ansieau, S.1    Morel, A.P.2    Hinkal, G.3
  • 25
    • 84861712713 scopus 로고    scopus 로고
    • Mesenchymal and stemness circulating tumor cells in early breast cancer diagnosis
    • Barrière G, Riouallon A, Renaudie J, et al. Mesenchymal and stemness circulating tumor cells in early breast cancer diagnosis. BMC Cancer 2012;12:114.
    • (2012) BMC Cancer , vol.12 , pp. 114
    • Barrière, G.1    Riouallon, A.2    Renaudie, J.3
  • 26
    • 77952936573 scopus 로고    scopus 로고
    • PI3K pathway-directed therapeutic strategies in cancer
    • Agarwal R, Carey M, Hennessy B, et al. PI3K pathway-directed therapeutic strategies in cancer. Curr Opin Investig Drugs 2010;11:615-28.
    • (2010) Curr Opin Investig Drugs , vol.11 , pp. 615-628
    • Agarwal, R.1    Carey, M.2    Hennessy, B.3
  • 27
    • 84896711564 scopus 로고    scopus 로고
    • Direct repression of MYB by ZEB1 suppresses proliferation and epithelial gene expression during epithelial-to-mesenchymal transition of breast cancer cells
    • Hugo HJ, Pereira L, Suryadinata R, et al. Direct repression of MYB by ZEB1 suppresses proliferation and epithelial gene expression during epithelial-to-mesenchymal transition of breast cancer cells. Breast Cancer Res 2013;15:R113.
    • (2013) Breast Cancer Res , vol.15
    • Hugo, H.J.1    Pereira, L.2    Suryadinata, R.3
  • 28
    • 84887278742 scopus 로고    scopus 로고
    • MicroRNA-based regulation of epithelial-hybrid-mesenchymal fate determination
    • Lu M, Jolly MK, Levine H, et al. MicroRNA-based regulation of epithelial-hybrid-mesenchymal fate determination. Proc Natl Acad Sci U S A 2013;110:18144-9.
    • (2013) Proc Natl Acad Sci U S A , vol.110 , pp. 18144-18149
    • Lu, M.1    Jolly, M.K.2    Levine, H.3
  • 29
    • 51049084629 scopus 로고    scopus 로고
    • Human Mena+11a isoform serves as a marker of epithelial phenotype and sensitivity to epidermal growth factor receptor inhibition in human pancreatic cancer cell lines
    • Pino MS, Balsamo M, Di Modugno F, et al. Human Mena+11a isoform serves as a marker of epithelial phenotype and sensitivity to epidermal growth factor receptor inhibition in human pancreatic cancer cell lines. Clin Cancer Res 2008;14:4943-50.
    • (2008) Clin Cancer Res , vol.14 , pp. 4943-4950
    • Pino, M.S.1    Balsamo, M.2    Di Modugno, F.3
  • 30
    • 84869767975 scopus 로고    scopus 로고
    • Splicing program of human MENA produces a previously undescribed isoform associated with invasive, mesenchymal-like breast tumors
    • Di Modugno F, Iapicca P, Boudreau A, et al. Splicing program of human MENA produces a previously undescribed isoform associated with invasive, mesenchymal-like breast tumors. Proc Natl Acad Sci U S A 2012;109:19280-5.
    • (2012) Proc Natl Acad Sci U S A , vol.109 , pp. 19280-19285
    • Di Modugno, F.1    Iapicca, P.2    Boudreau, A.3
  • 31
    • 0032104205 scopus 로고    scopus 로고
    • Molecular cloning of the human p120ctn catenin gene (CTNND1): expression of multiple alternatively spliced isoforms
    • Keirsebilck A, Bonné S, Staes K, et al. Molecular cloning of the human p120ctn catenin gene (CTNND1): expression of multiple alternatively spliced isoforms. Genomics 1998;50:129-46.
    • (1998) Genomics , vol.50 , pp. 129-146
    • Keirsebilck, A.1    Bonné, S.2    Staes, K.3
  • 32
    • 84922841454 scopus 로고    scopus 로고
    • Aberrant expression of plastin-3 via copy number gain induces the epithelial-mesenchymal transition in circulating colorectal cancer cells
    • Sugimachi K, Yokobori T, Iinuma H, et al. Aberrant expression of plastin-3 via copy number gain induces the epithelial-mesenchymal transition in circulating colorectal cancer cells. Ann Surg Oncol 2014;21:3680-90.
    • (2014) Ann Surg Oncol , vol.21 , pp. 3680-3690
    • Sugimachi, K.1    Yokobori, T.2    Iinuma, H.3
  • 33
    • 84890923642 scopus 로고    scopus 로고
    • Cancer stem cells and tumor metastasis
    • Sun S, Qiu XS. Cancer stem cells and tumor metastasis. J Cancer Res Ther 2013;9 Suppl:S150-2.
    • (2013) J Cancer Res Ther , vol.9 , pp. S150-S152
    • Sun, S.1    Qiu, X.S.2
  • 34
    • 84892619683 scopus 로고    scopus 로고
    • Breast Cancer Stem Cells Transition between Epithelial and Mesenchymal States Reflective of their Normal Counterparts
    • Liu S, Cong Y, Wang D, et al. Breast Cancer Stem Cells Transition between Epithelial and Mesenchymal States Reflective of their Normal Counterparts. Stem Cell Reports 2013;2:78-91.
    • (2013) Stem Cell Reports , vol.2 , pp. 78-91
    • Liu, S.1    Cong, Y.2    Wang, D.3
  • 35
    • 35848955428 scopus 로고    scopus 로고
    • ALDH1 is a marker of normal and malignant human mammary stem cells and a predictor of poor clinical outcome
    • Ginestier C, Hur MH, Charafe-Jauffret E, et al. ALDH1 is a marker of normal and malignant human mammary stem cells and a predictor of poor clinical outcome. Cell Stem Cell 2007;1:555-67.
    • (2007) Cell Stem Cell , vol.1 , pp. 555-567
    • Ginestier, C.1    Hur, M.H.2    Charafe-Jauffret, E.3
  • 36
    • 84865679773 scopus 로고    scopus 로고
    • Mesenchymal characterization: alternative to simple CTC detection in two clinical trials
    • Barriere G, Riouallon A, Renaudie J, et al. Mesenchymal characterization: alternative to simple CTC detection in two clinical trials. Anticancer Res 2012;32:3363-9.
    • (2012) Anticancer Res , vol.32 , pp. 3363-3369
    • Barriere, G.1    Riouallon, A.2    Renaudie, J.3
  • 37
    • 33750306612 scopus 로고    scopus 로고
    • Most early disseminated cancer cells detected in bone marrow of breast cancer patients have a putative breast cancer stem cell phenotype
    • Balic M, Lin H, Young L, et al. Most early disseminated cancer cells detected in bone marrow of breast cancer patients have a putative breast cancer stem cell phenotype. Clin Cancer Res 2006;12:5615-21.
    • (2006) Clin Cancer Res , vol.12 , pp. 5615-5621
    • Balic, M.1    Lin, H.2    Young, L.3
  • 39
    • 84856528891 scopus 로고    scopus 로고
    • Metaplastic breast carcinomas are enriched in markers of tumor-initiating cells and epithelial to mesenchymal transition
    • Zhang Y, Toy KA, Kleer CG. Metaplastic breast carcinomas are enriched in markers of tumor-initiating cells and epithelial to mesenchymal transition. Mod Pathol 2012;25:178-84.
    • (2012) Mod Pathol , vol.25 , pp. 178-184
    • Zhang, Y.1    Toy, K.A.2    Kleer, C.G.3
  • 40
    • 84896115102 scopus 로고    scopus 로고
    • CD44v6 is a marker of constitutive and reprogrammed cancer stem cells driving colon cancer metastasis
    • Todaro M, Gaggianesi M, Catalano V, et al. CD44v6 is a marker of constitutive and reprogrammed cancer stem cells driving colon cancer metastasis. Cell Stem Cell 2014;14:342-56.
    • (2014) Cell Stem Cell , vol.14 , pp. 342-356
    • Todaro, M.1    Gaggianesi, M.2    Catalano, V.3
  • 41
    • 84861801520 scopus 로고    scopus 로고
    • Ganglioside GD2 identifies breast cancer stem cells and promotes tumorigenesis
    • Battula VL, Shi Y, Evans KW, et al. Ganglioside GD2 identifies breast cancer stem cells and promotes tumorigenesis. J Clin Invest 2012;122:2066-78.
    • (2012) J Clin Invest , vol.122 , pp. 2066-2078
    • Battula, V.L.1    Shi, Y.2    Evans, K.W.3
  • 42
    • 84875530777 scopus 로고    scopus 로고
    • Differential expression profiles of glycosphingolipids in human breast cancer stem cells vs. cancer non-stem cells
    • Liang YJ, Ding Y, Levery SB, et al. Differential expression profiles of glycosphingolipids in human breast cancer stem cells vs. cancer non-stem cells. Proc Natl Acad Sci U S A 2013;110:4968-73.
    • (2013) Proc Natl Acad Sci U S A , vol.110 , pp. 4968-4973
    • Liang, Y.J.1    Ding, Y.2    Levery, S.B.3
  • 43
    • 34250306257 scopus 로고    scopus 로고
    • Side population in human lung cancer cell lines and tumors is enriched with stem-like cancer cells
    • Ho MM, Ng AV, Lam S, et al. Side population in human lung cancer cell lines and tumors is enriched with stem-like cancer cells. Cancer Res 2007;67:4827-33.
    • (2007) Cancer Res , vol.67 , pp. 4827-4833
    • Ho, M.M.1    Ng, A.V.2    Lam, S.3
  • 44
    • 69849110542 scopus 로고    scopus 로고
    • A side population of cells from a human pancreatic carcinoma cell line harbors cancer stem cell characteristics
    • Wang YH, Li F, Luo B, et al. A side population of cells from a human pancreatic carcinoma cell line harbors cancer stem cell characteristics. Neoplasma 2009;56:371-8.
    • (2009) Neoplasma , vol.56 , pp. 371-378
    • Wang, Y.H.1    Li, F.2    Luo, B.3
  • 45
    • 26244466390 scopus 로고    scopus 로고
    • Cancer stem cell characteristics in retinoblastoma
    • Seigel GM, Campbell LM, Narayan M, et al. Cancer stem cell characteristics in retinoblastoma. Mol Vis 2005;11:729-37.
    • (2005) Mol Vis , vol.11 , pp. 729-737
    • Seigel, G.M.1    Campbell, L.M.2    Narayan, M.3
  • 46
    • 84871990259 scopus 로고    scopus 로고
    • Biologic challenges in the detection of circulating tumor cells
    • Joosse SA, Pantel K. Biologic challenges in the detection of circulating tumor cells. Cancer Res 2013;73:8-11.
    • (2013) Cancer Res , vol.73 , pp. 8-11
    • Joosse, S.A.1    Pantel, K.2
  • 47
    • 84863100828 scopus 로고    scopus 로고
    • Considerations in the development of circulating tumor cell technology for clinical use
    • Parkinson DR, Dracopoli N, Petty BG, et al. Considerations in the development of circulating tumor cell technology for clinical use. J Transl Med.2012;10:138.
    • (2012) J Transl Med , vol.10 , pp. 138
    • Parkinson, D.R.1    Dracopoli, N.2    Petty, B.G.3
  • 48
    • 84878453265 scopus 로고    scopus 로고
    • Detection and recovery of circulating colon cancer cells using a dielectrophoresis-based device: KRAS mutation status in pure CTCs
    • Fabbri F, Carloni S, Zoli W, et al. Detection and recovery of circulating colon cancer cells using a dielectrophoresis-based device: KRAS mutation status in pure CTCs. Cancer Lett 2013;335:225-31.
    • (2013) Cancer Lett , vol.335 , pp. 225-231
    • Fabbri, F.1    Carloni, S.2    Zoli, W.3
  • 49
    • 84896965396 scopus 로고    scopus 로고
    • The workflow of single-cell expression profiling using quantitative real-time PCR
    • Ståhlberg A, Kubista M. The workflow of single-cell expression profiling using quantitative real-time PCR. Expert Rev Mol Diagn 2014;14:323-31.
    • (2014) Expert Rev Mol Diagn , vol.14 , pp. 323-331
    • Ståhlberg, A.1    Kubista, M.2
  • 50
    • 85052425112 scopus 로고    scopus 로고
    • Dedifferentiated circulating tumor cells and epithelial mesenchymal transition in Breast cancer: From epithelial cell to the stem cells
    • October 4. Faculté de medicine Pierre et Marie Curie, Paris
    • Barrière G, Fici P, Rigaud M. Dedifferentiated circulating tumor cells and epithelial mesenchymal transition in Breast cancer: From epithelial cell to the stem cells. International Stem cells symposium October 4, 2013. Faculté de medicine Pierre et Marie Curie, Paris. Available online: http://www.fhf.fr/Actualites/Medecins/Agenda-medical/Colloque-international-sur-les-cellules-souches
    • (2013) International Stem cells symposium
    • Barrière, G.1    Fici, P.2    Rigaud, M.3


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.