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Volumn 11, Issue 3-4, 2012, Pages 391-401

Different effects of intermittent and continuous fluid shear stresses on osteogenic differentiation of human mesenchymal stem cells

Author keywords

FSS; HMSCs; Osteogenesis; Perfusion culture

Indexed keywords

ALKALINE PHOSPHATASE ACTIVITY; BONE TISSUE; BONE TISSUE ENGINEERING; DIFFERENT EFFECTS; EXPRESSION LEVELS; FLUID SHEAR STRESS; FSS; HMSCS; HUMAN MESENCHYMAL STEM CELLS; HUMAN MESENCHYMAL STEM CELLS (HMSCS); IN-VIVO; MICROENVIRONMENTS; OSTEOGENESIS; OSTEOGENIC; OSTEOGENIC DIFFERENTIATION; PERFUSION CULTURES; SIGNALING MOLECULES;

EID: 84861097397     PISSN: 16177959     EISSN: 16177940     Source Type: Journal    
DOI: 10.1007/s10237-011-0319-x     Document Type: Article
Times cited : (61)

References (42)
  • 1
    • 64849094619 scopus 로고    scopus 로고
    • Mechanically induced osteogenic differentiation-The role of RhoA, ROCKII and cytoskeletal dynamics
    • Arnsdorf EJ, Tummala P, Kwon RY, Jacobs CR (2009) Mechanically induced osteogenic differentiation-the role of RhoA, ROCKII and cytoskeletal dynamics. J Cell Sci 122:546-553
    • (2009) J Cell Sci , vol.122 , pp. 546-553
    • Arnsdorf, E.J.1    Tummala, P.2    Kwon, R.Y.3    Jacobs, C.R.4
  • 3
    • 0033137070 scopus 로고    scopus 로고
    • Extracellular matrix and integrin signalling: The shape of things to come
    • DOI 10.1042/0264-6021:3390481
    • Boudreau NJ, Jones PL (1999) Extracellularmatrix and integrin signalling: the shape of things to come. Biochem J 339(Pt 3):481-488 (Pubitemid 29243508)
    • (1999) Biochemical Journal , vol.339 , Issue.3 , pp. 481-488
    • Boudreau, N.J.1    Jones, P.L.2
  • 4
    • 0028331392 scopus 로고
    • How connective tissues temporally process mechanical stimuli
    • DOI 10.1016/0306-9877(94)90083-3
    • Brand RA, Stanford CM (1994) How connective tissues temporally process mechanical stimuli. Med Hypotheses 42:99-104 (Pubitemid 24087907)
    • (1994) Medical Hypotheses , vol.42 , Issue.2 , pp. 99-104
    • Brand, R.A.1    Stanford, C.M.2
  • 5
    • 40049097226 scopus 로고    scopus 로고
    • FAK-mediated activation of ERK for eosinophil migration: A novel mechanism for infection-induced allergic inflammation
    • DOI 10.1093/intimm/dxm146
    • Cheung PF, Wong CK, Ip WK, Lam CW (2008) FAK-mediated activation of ERK for eosinophil migration: a novel mechanism for infection-induced allergic inflammation. Int Immunol 20: 353-363 (Pubitemid 351321243)
    • (2008) International Immunology , vol.20 , Issue.3 , pp. 353-363
    • Cheung, P.F.1    Wong, C.-K.2    Ip, W.-K.3    Lam, C.W.4
  • 6
    • 0032748173 scopus 로고    scopus 로고
    • Propagation and senescence of human marrow stromal cells in culture: A simple colony-forming assay identifies samples with the greatest potential to propagate and differentiate
    • DOI 10.1046/j.1365-2141.1999.01715.x
    • Digirolamo CM, Stokes D, Colter D, Phinney DG, Class R, Prockop DJ (1999) Propagation and senescence of human marrow stromal cells in culture: a simple colony-forming assay identifies samples with the greatest potential to propagate and differentiate. Br J Haematol 107:275-281 (Pubitemid 29530211)
    • (1999) British Journal of Haematology , vol.107 , Issue.2 , pp. 275-281
    • Digirolamo, C.M.1    Stokes, D.2    Colter, D.3    Phinney, D.G.4    Class, R.5    Prockop, D.J.6
  • 7
    • 77957711583 scopus 로고    scopus 로고
    • Extracellular matrix produced by osteoblasts cultured under lowmagnitude, high-frequency stimulation is favourable to osteogenic differentiation of mesenchymal stem cells
    • Dumas V, Ducharne B, Perrier A, Fournier C, Guignandon A, Thomas M, Peyroche S, Guyomar D, Vico L, Rattner A (2010) Extracellular matrix produced by osteoblasts cultured under lowmagnitude, high-frequency stimulation is favourable to osteogenic differentiation of mesenchymal stem cells. Calcif Tissue Int 87:351-364
    • (2010) Calcif Tissue Int , vol.87 , pp. 351-364
    • Dumas, V.1    Ducharne, B.2    Perrier, A.3    Fournier, C.4    Guignandon, A.5    Thomas, M.6    Peyroche, S.7    Guyomar, D.8    Vico, L.9    Rattner, A.10
  • 8
    • 67349173646 scopus 로고    scopus 로고
    • Effect of fluid flow-induced shear stress on human mesenchymal stem cells: Differential gene expression of IL1B and MAP3K8 in MAPK signaling
    • Glossop JR, Cartmell SH (2009) Effect of fluid flow-induced shear stress on human mesenchymal stem cells: differential gene expression of IL1B and MAP3K8 in MAPK signaling. Gene Expr Patterns 9:381-388
    • (2009) Gene Expr Patterns , vol.9 , pp. 381-388
    • Glossop, J.R.1    Cartmell, S.H.2
  • 10
    • 0031563826 scopus 로고    scopus 로고
    • Effects of intermittent or continuous gravitational stresses on cell- matrix adhesion: Quantitative analysis of focal contacts in osteoblastic ROS 17/2.8 cells
    • DOI 10.1006/excr.1997.3703
    • Guignandon A, Usson Y, Laroche N, Lafage-Proust MH, Sabido O, Alexandre C, Vico L (1997) Effects of intermittent or continuous gravitational stresses on cell-matrix adhesion: quantitative analysis of focal contacts in osteoblastic ROS 17/2.8 cells. Exp Cell Res 236:66-75 (Pubitemid 27452350)
    • (1997) Experimental Cell Research , vol.236 , Issue.1 , pp. 66-75
    • Guignandon, A.1    Usson, Y.2    Laroche, N.3    Lafage-Proust, M.-H.4    Sabido, O.5    Alexandre, C.6    Vico, L.7
  • 11
    • 56449086365 scopus 로고    scopus 로고
    • Themechanical environment of bone marrow: A review
    • Gurkan UA, Akkus O (2008) Themechanical environment of bone marrow: a review. Ann Biomed Eng 36:1978-1991
    • (2008) Ann Biomed Eng , vol.36 , pp. 1978-1991
    • Gurkan, U.A.1    Akkus, O.2
  • 13
    • 59449089621 scopus 로고    scopus 로고
    • Pressure and distortion regulate human mesenchymal stem cell gene expression
    • Haudenschild AK, Hsieh AH, Kapila S, Lotz JC (2009) Pressure and distortion regulate human mesenchymal stem cell gene expression. Ann Biomed Eng 37:492-502
    • (2009) Ann Biomed Eng , vol.37 , pp. 492-502
    • Haudenschild, A.K.1    Hsieh, A.H.2    Kapila, S.3    Lotz, J.C.4
  • 14
    • 27744502341 scopus 로고    scopus 로고
    • Perfusion culture enhances osteogenic differentiation of rat mesenchymal stem cells in collagen sponge reinforced with poly(glycolic acid) fiber
    • DOI 10.1089/ten.2005.11.1476
    • Hosseinkhani H, Inatsugu Y, Hiraoka Y, Inoue S, Tabata Y (2005) Perfusion culture enhances osteogenic differentiation of rat mesenchymal stem cells in collagen sponge reinforced with poly(glycolic Acid) fiber. Tissue Eng 11:1476-1488 (Pubitemid 41636433)
    • (2005) Tissue Engineering , vol.11 , Issue.9-10 , pp. 1476-1488
    • Hosseinkhani, H.1    Inatsugu, Y.2    Hiraoka, Y.3    Inoue, S.4    Tabata, Y.5
  • 15
    • 71749100048 scopus 로고    scopus 로고
    • Interactive effects of mechanical stretching and extracellular matrix proteins on initiating osteogenic differentiation of human mesenchymal stem cells
    • Huang CH, Chen MH, Young TH, Jeng JH, Chen YJ (2009) Interactive effects of mechanical stretching and extracellular matrix proteins on initiating osteogenic differentiation of human mesenchymal stem cells. J Cell Biochem 108:1263-1273
    • (2009) J Cell Biochem , vol.108 , pp. 1263-1273
    • Huang, C.H.1    Chen, M.H.2    Young, T.H.3    Jeng, J.H.4    Chen, Y.J.5
  • 16
    • 9644303172 scopus 로고    scopus 로고
    • Transcriptional induction of FosB/δFosB gene by mechanical stress in osteoblasts
    • DOI 10.1074/jbc.M404096200
    • Inoue D, Kido S, Matsumoto T (2004) Transcriptional induction of FosB/DeltaFosB gene by mechanical stress in osteoblasts. J Biol Chem 279:49795-49803 (Pubitemid 39577785)
    • (2004) Journal of Biological Chemistry , vol.279 , Issue.48 , pp. 49795-49803
    • Inoue, D.1    Kido, S.2    Matsumoto, T.3
  • 17
    • 0033533393 scopus 로고    scopus 로고
    • Cytoskeletal reorganization leads to induction of the urokinase-type plasminogen activator gene by activating FAK and Src and subsequently the Ras/Erk signaling pathway
    • DOI 10.1006/bbrc.1999.1202
    • Irigoyen JP, Nagamine Y (1999) Cytoskeletal reorganization leads to induction of the urokinase-type plasminogen activator gene by activating FAK and Src and subsequently the Ras/Erk signaling pathway. Biochem Biophys Res Commun 262:666-670 (Pubitemid 29443716)
    • (1999) Biochemical and Biophysical Research Communications , vol.262 , Issue.3 , pp. 666-670
    • Irigoyen, J.P.1    Nagamine, Y.2
  • 18
    • 34547906444 scopus 로고    scopus 로고
    • Mechanical stress-mediated Runx2 activation is dependent on Ras/ERK1/2 MAPK signaling in osteoblasts
    • DOI 10.1002/jcb.21249
    • Kanno T, Takahashi T, Tsujisawa T, Ariyoshi W, Nishihara T (2007) Mechanical stress-mediated Runx2 activation is dependent on Ras/ERK1/2 MAPK signaling in osteoblasts. J Cell Biochem 101:1266-1277 (Pubitemid 47253725)
    • (2007) Journal of Cellular Biochemistry , vol.101 , Issue.5 , pp. 1266-1277
    • Kanno, T.1    Takahashi, T.2    Tsujisawa, T.3    Ariyoshi, W.4    Nishihara, T.5
  • 19
    • 0037345529 scopus 로고    scopus 로고
    • Fluid flow shear stress stimulates human osteoblast proliferation and differentiation through multiple interacting and competing signal transduction pathways
    • DOI 10.1016/S8756-3282(02)00979-1
    • Kapur S, Baylink DJ, Lau KH (2003) Fluid flow shear stress stimulates human osteoblast proliferation and differentiation through multiple interacting and competing signal transduction pathways. Bone 32:241-251 (Pubitemid 36349527)
    • (2003) Bone , vol.32 , Issue.3 , pp. 241-251
    • Kapur, S.1    Baylink, D.J.2    Lau, K.-H.W.3
  • 20
    • 33847231284 scopus 로고    scopus 로고
    • ERK 1/2 activation in enhanced osteogenesis of human mesenchymal stem cells in poly(lactic-glycolic acid) by cyclic hydrostatic pressure
    • Kim SH, Choi YR, Park MS, Shin JW, Park KD, Kim SJ, Lee JW (2007) ERK 1/2 activation in enhanced osteogenesis of human mesenchymal stem cells in poly(lactic-glycolic acid) by cyclic hydrostatic pressure. J Biomed Mater Res A 80:826-836
    • (2007) J Biomed Mater Res A , vol.80 , pp. 826-836
    • Kim, S.H.1    Choi, Y.R.2    Park, M.S.3    Shin, J.W.4    Park, K.D.5    Kim, S.J.6    Lee, J.W.7
  • 21
    • 42049100497 scopus 로고    scopus 로고
    • Effect of intermittent shear stress on mechanotransductive signaling and osteoblastic differentiation of bone marrow stromal cells
    • DOI 10.1089/tea.2007.0068
    • Kreke MR, Sharp LA, Lee YW, Goldstein AS (2008) Effect of intermittent shear stress on mechanotransductive signaling and osteoblastic differentiation of bone marrow stromal cells. Tissue Eng Part A 14:529-537 (Pubitemid 351520460)
    • (2008) Tissue Engineering - Part A. , vol.14 , Issue.4 , pp. 529-537
    • Kreke, M.R.1    Sharp, L.A.2    Woo Lee, Y.3    Goldstein, A.S.4
  • 22
    • 2342638385 scopus 로고    scopus 로고
    • Rest insertion combined with high-frequency loading enhances osteogenesis
    • DOI 10.1152/japplphysiol.01145.2003
    • LaMothe JM, Zernicke RF (2004) Rest insertion combined with highfrequency loading enhances osteogenesis. J Appl Physiol 96: 1788-1793 (Pubitemid 38580004)
    • (2004) Journal of Applied Physiology , vol.96 , Issue.5 , pp. 1788-1793
    • LaMothe, J.M.1    Zernicke, R.F.2
  • 23
    • 46249124836 scopus 로고    scopus 로고
    • Integrin-mediated expression of bone formation-related genes in osteoblast-like cells in response to fluid shear stress: Roles of extracellular matrix, Shc, and mitogen-activated protein kinase
    • DOI 10.1359/jbmr.080302
    • Lee DY, Yeh CR, Chang SF, Lee PL, Chien S, Cheng CK, Chiu JJ (2008) Integrin-mediated expression of bone formation-related genes in osteoblast-like cells in response to fluid shear stress: roles of extracellular matrix, Shc, and mitogen-activated protein kinase. J Bone Miner Res 23:1140-1149 (Pubitemid 351915736)
    • (2008) Journal of Bone and Mineral Research , vol.23 , Issue.7 , pp. 1140-1149
    • Lee, D.-Y.1    Yeh, C.-R.2    Chang, S.-F.3    Lee, P.-L.4    Chien, S.5    Cheng, C.-K.6    Chiu, J.-J.7
  • 24
    • 78649831457 scopus 로고    scopus 로고
    • Mechanisms for osteogenic differentiation of human mesenchymal stem cells induced by fluid shear stress
    • Liu L, Yuan W, Wang J (2010) Mechanisms for osteogenic differentiation of human mesenchymal stem cells induced by fluid shear stress. Biomech Model Mechanobiol 9:659-670
    • (2010) Biomech Model Mechanobiol , vol.9 , pp. 659-670
    • Liu, L.1    Yuan, W.2    Wang, J.3
  • 25
    • 0034643303 scopus 로고    scopus 로고
    • Fluid shear stress stimulates prostaglandin and nitric oxide release in bone marrow-derived preosteoclast-like cells
    • DOI 10.1006/bbrc.2000.2467
    • McAllister TN, Du T, Frangos JA (2000) Fluid shear stress stimulates prostaglandin and nitric oxide release in bone marrow-derived preosteoclast-like cells. Biochem Biophys Res Commun 270: 643-648 (Pubitemid 30446888)
    • (2000) Biochemical and Biophysical Research Communications , vol.270 , Issue.2 , pp. 643-648
    • McAllister, T.N.1    Du, T.2    Frangos, J.A.3
  • 26
    • 0033853399 scopus 로고    scopus 로고
    • Mechanical loading stimulates differentiation of periodontal osteoblasts in a mouse osteoinduction model: Effect on type I collagen and alkaline phosphatase genes
    • Pavlin D, Dove SB, Zadro R, Gluhak-Heinrich J (2000) Mechanical loading stimulates differentiation of periodontal osteoblasts in a mouse osteoinduction model: effect on type I collagen and alkaline phosphatase genes. Calcif Tissue Int 67:163-172 (Pubitemid 30614643)
    • (2000) Calcified Tissue International , vol.67 , Issue.2 , pp. 163-172
    • Pavlin, D.1    Dove, S.B.2    Zadro, R.3    Gluhak-Heinrich, J.4
  • 28
    • 33645452566 scopus 로고    scopus 로고
    • MAP kinase and calcium signaling mediate fluid flow-induced human mesenchymal stem cell proliferation
    • Riddle RC, Taylor AF, Genetos DC, Donahue HJ (2006) MAP kinase and calcium signaling mediate fluid flow-induced human mesenchymal stem cell proliferation. Am J Physiol Cell Physiol 290:C776-C784
    • (2006) Am J Physiol Cell Physiol , vol.290
    • Riddle, R.C.1    Taylor, A.F.2    Genetos, D.C.3    Donahue, H.J.4
  • 29
    • 59449110766 scopus 로고    scopus 로고
    • Effect of low-frequency pulsatile flow on expression of osteoblastic genes by bone marrow stromal cells
    • Sharp LA, Lee YW, Goldstein AS (2009) Effect of low-frequency pulsatile flow on expression of osteoblastic genes by bone marrow stromal cells. Ann Biomed Eng 37:445-453
    • (2009) Ann Biomed Eng , vol.37 , pp. 445-453
    • Sharp, L.A.1    Lee, Y.W.2    Goldstein, A.S.3
  • 30
    • 0037710189 scopus 로고    scopus 로고
    • Cyclic strain enhances matrix mineralization by adult human mesenchymal stem cells via the extracellular signal-regulated kinase (ERK1/2) signaling pathway
    • DOI 10.1016/S0021-9290(03)00110-6
    • Simmons CA, Matlis S, Thornton AJ, Chen S, Wang CY, Mooney DJ (2003) Cyclic strain enhances matrix mineralization by adult human mesenchymal stem cells via the extracellular signalregulated kinase (ERK1/2) signaling pathway. J Biomech 36: 1087-1096 (Pubitemid 36794104)
    • (2003) Journal of Biomechanics , vol.36 , Issue.8 , pp. 1087-1096
    • Simmons, C.A.1    Matlis, S.2    Thornton, A.J.3    Chen, S.4    Wang, C.-Y.5    Mooney, D.J.6
  • 31
    • 34447320732 scopus 로고    scopus 로고
    • Perfusion flow bioreactor for 3D in situ imaging: Investigating cell/biomaterials interactions
    • DOI 10.1002/bit.21252
    • Stephens JS, Cooper JA, Phelan FRJr, Dunkers JP (2007) Perfusion flow bioreactor for 3D in situ imaging: investigating cell/biomaterials interactions. Biotechnol Bioeng 97:952-961 (Pubitemid 47051063)
    • (2007) Biotechnology and Bioengineering , vol.97 , Issue.4 , pp. 952-961
    • Stephens, J.S.1    Cooper, J.A.2    Phelan Jr., F.R.3    Dunkers, J.P.4
  • 32
    • 62249103678 scopus 로고    scopus 로고
    • Effect of dynamic 3-D culture on proliferation, distribution, and osteogenic differentiation of human mesenchymal stem cells
    • Stiehler M, Bunger C, Baatrup A, Lind M, Kassem M, Mygind T (2009) Effect of dynamic 3-D culture on proliferation, distribution, and osteogenic differentiation of human mesenchymal stem cells. J Biomed Mater Res A 89:96-107
    • (2009) J Biomed Mater Res A , vol.89 , pp. 96-107
    • Stiehler, M.1    Bunger, C.2    Baatrup, A.3    Lind, M.4    Kassem, M.5    Mygind, T.6
  • 33
    • 70449723751 scopus 로고    scopus 로고
    • Characteristics of newly formed bone during guided bone regeneration: Analysis of cbfa-1, osteocalcin, and VEGF expression
    • Tanaka S, Matsuzaka K, Sato D, Inoue T (2007) Characteristics of newly formed bone during guided bone regeneration: analysis of cbfa-1, osteocalcin, and VEGF expression. J Oral Implantol 33:321-326
    • (2007) J Oral Implantol , vol.33 , pp. 321-326
    • Tanaka, S.1    Matsuzaka, K.2    Sato, D.3    Inoue, T.4
  • 34
    • 77953811664 scopus 로고    scopus 로고
    • In vivo restoration of full-thickness cartilage defects by poly(lactide-coglycolide) sponges filled with fibrin gel, bone marrow mesenchymal stem cells and DNA complexes
    • Wang W, Li B, Li Y, Jiang Y, Ouyang H, Gao C (2010) In vivo restoration of full-thickness cartilage defects by poly(lactide-coglycolide) sponges filled with fibrin gel, bone marrow mesenchymal stem cells and DNA complexes. Biomaterials 31:5953-5965
    • (2010) Biomaterials , vol.31 , pp. 5953-5965
    • Wang, W.1    Li, B.2    Li, Y.3    Jiang, Y.4    Ouyang, H.5    Gao, C.6
  • 35
    • 0028386524 scopus 로고
    • A model for the excitation of osteocytes by mechanical loading-induced bone fluid shear stresses
    • DOI 10.1016/0021-9290(94)90010-8
    • Weinbaum S, Cowin SC, Zeng Y (1994) A model for the excitation of osteocytes by mechanical loading-induced bone fluid shear stresses. J Biomech 27:339-360 (Pubitemid 24061729)
    • (1994) Journal of Biomechanics , vol.27 , Issue.3 , pp. 339-360
    • Weinbaum, S.1
  • 38
    • 75749099718 scopus 로고    scopus 로고
    • Proliferation and osteogenesis of immortalized bone marrow-derived mesenchymal stem cells in porous polylactic glycolic acid scaffolds under perfusion culture
    • Yang J, Cao C, Wang W, Tong X, Shi D, Wu F, Zheng Q, Guo C, Pan Z, Gao C, Wang J (2010) Proliferation and osteogenesis of immortalized bone marrow-derived mesenchymal stem cells in porous polylactic glycolic acid scaffolds under perfusion culture. J Biomed Mater Res A 92:817-829
    • (2010) J Biomed Mater Res A , vol.92 , pp. 817-829
    • Yang, J.1    Cao, C.2    Wang, W.3    Tong, X.4    Shi, D.5    Wu, F.6    Zheng, Q.7    Guo, C.8    Pan, Z.9    Gao, C.10    Wang, J.11
  • 39
    • 61849122936 scopus 로고    scopus 로고
    • Focal adhesion kinase is important for fluid shear stress-induced mechanotransduction in osteoblasts
    • Young SR, Gerard-O'Riley R, Kim JB, Pavalko FM (2009) Focal adhesion kinase is important for fluid shear stress-induced mechanotransduction in osteoblasts. J Bone Miner Res 24:411-424
    • (2009) J Bone Miner Res , vol.24 , pp. 411-424
    • Young, S.R.1    Gerard-O'Riley, R.2    Kim, J.B.3    Pavalko, F.M.4
  • 40
    • 77957172424 scopus 로고    scopus 로고
    • Shear stress induces osteogenic differentiation of human mesenchymal stem cells
    • Yourek G, McCormick SM, Mao JJ, Reilly GC (2010) Shear stress induces osteogenic differentiation of human mesenchymal stem cells. Regen Med 5:713-724
    • (2010) Regen Med , vol.5 , pp. 713-724
    • Yourek, G.1    McCormick, S.M.2    Mao, J.J.3    Reilly, G.C.4
  • 41
    • 0036324853 scopus 로고    scopus 로고
    • Role of Raf-1 and FAK in cell density-dependent regulation of integrin-dependent activation of MAP kinase
    • Zhang L, Bewick M, Lafrenie RM (2002) Role of Raf-1 and FAK in cell density-dependent regulation of integrin-dependent activation of MAP kinase. Carcinogenesis 23:1251-1258 (Pubitemid 34814785)
    • (2002) Carcinogenesis , vol.23 , Issue.7 , pp. 1251-1258
    • Zhang, L.1    Bewick, M.2    Lafrenie, R.M.3
  • 42
    • 57349193459 scopus 로고    scopus 로고
    • A composite scaffold of PLGA microspheres/fibrin gel for cartilage tissue engineering: Fabrication, physical properties, and cell responsiveness
    • Zhao H, Ma L, Gao C, Shen J (2009) A composite scaffold of PLGA microspheres/fibrin gel for cartilage tissue engineering: fabrication, physical properties, and cell responsiveness. J BiomedMater Res B Appl Biomater 88:240-249
    • (2009) J BiomedMater Res B Appl Biomater , vol.88 , pp. 240-249
    • Zhao, H.1    Ma, L.2    Gao, C.3    Shen, J.4


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