Abstract
The selective permeability of the blood–brain barrier (BBB) is controlled by tight junction-expressing brain endothelial cells. The integrity of these junctional proteins, which anchor to actin via zonula occludens (e.g., ZO-1), plays a vital role in barrier function. While disrupted junctions are linked with several neurodegenerative diseases, the mechanisms underlying disruption are not fully understood. This is largely due to the lack of appropriate models and efficient techniques to quantify edge-localized protein. Here, we developed a novel junction analyzer program (JAnaP) to semi-automate the quantification of junctional protein presentation. Because significant evidence suggests a link between myosin-II mediated contractility and endothelial barrier properties, we used the JAnaP to investigate how biochemical and physical cues associated with altered contractility influence ZO-1 presentation in brain endothelial cells. Treatment with contractility-decreasing agents increased continuous ZO-1 presentation; however, this increase was greatest on soft gels of brain-relevant stiffness, suggesting improved barrier maturation. This effect was reversed by biochemically inhibiting protein phosphatases to increase cell contractility on soft substrates. These results promote the use of brain-mimetic substrate stiffness in BBB model design and motivates the use of this novel JAnaP to provide insight into the role of junctional protein presentation in BBB physiology and pathologies.
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References
Abbott, N. J., and A. Friedman. Overview and introduction: the blood-brain barrier in health and disease. Epilepsia 53(Suppl 6):1–6, 2012.
Abdullahi, W., D. Tripathi, and P. T. Ronaldson. Blood-brain barrier dysfunction in ischemic stroke: targeting tight junctions and transporters for vascular protection. Am. J. Physiol. Physiol. 315:C343–C356, 2018.
Adamson, R. H., B. Liu, G. N. Fry, L. L. Rubin, and F. E. Curry. Microvascular permeability and number of tight junctions are modulated by cAMP. Am. Physiol. Soc. 274:H1885–H1894, 1998.
Andrews, A. M., E. M. Lutton, S. F. Merkel, R. Razmpour, and S. H. Ramirez. Mechanical injury induces brain endothelial-derived microvesicle release: implications for cerebral vascular injury during traumatic brain injury. Front. Cell. Neurosci. 10:43, 2016.
Beese, M., K. Wyss, M. Haubitz, and T. Kirsch. Effect of cAMP derivates on assembly and maintenance of tight junctions in human umbilical vein endothelial cells. BMC Cell Biol. 11:68, 2010.
Birukova, A. A., X. Tian, I. Cokic, Y. Beckham, M. L. Gardel, and K. G. Birukov. Endothelial barrier disruption and recovery is controlled by substrate stiffness. Microvasc. Res. 87:50–57, 2013.
Boutouyrie, P., A. I. Tropeano, R. Asmar, I. Gautier, A. Benetos, P. Lacolley, and S. Laurent. Aortic stiffness is an independent predictor of primary coronary events in hypertensive patients: a longitudinal study. Hypertens. (Dallas, Tex. 1979) 39:10–15, 2002.
Byfield, F. J., R. K. Reen, T. P. Shentu, I. Levitan, and K. J. Gooch. Endothelial actin and cell stiffness is modulated by substrate stiffness in 2D and 3D. J. Biomech. 42:1114–1119, 2009.
Chen, Y., F. Shen, J. Liu, and G.-Y. Yang. Arterial stiffness and stroke: de-stiffening strategy, a therapeutic target for stroke. BMJ 2:65–72, 2017.
Cheney, R. E. Myosins in cell junctions. Bioarchitecture 2:158–170, 2012.
Cho, Y.-E., D.-S. Ahn, K. G. Morgan, and Y.-H. Lee. Enhanced contractility and myosin phosphorylation induced by Ca 21-independent MLCK activity in hypertensive rats. Cardiovasc. Res. 91:162–170, 2011.
Dejana, E., F. Orsenigo, and M. G. Lampugnani. The role of adherens junctions and VE-cadherin in the control of vascular permeability. J. Cell Sci. 121:2115, 2008.
Dorland, Y. L., and S. Huveneers. Cell–cell junctional mechanotransduction in endothelial remodeling. Cell. Mol. Life Sci. 74:279–292, 2017.
Eigenmann, D. E., G. Xue, K. S. Kim, A. V. Moses, M. Hamburger, and M. Oufir. Comparative study of four immortalized human brain capillary endothelial cell lines, hCMEC/D3, hBMEC, TY10, and BB19, and optimization of culture conditions, for an in vitro blood-brain barrier model for drug permeability studies. Fluids Barriers CNS 10:33, 2013.
Escribano, J., M. B. Chen, E. Moeendarbary, X. Cao, V. Shenoy, J. Manuel Garcia-Aznar, R. D. Kamm, and F. Spill. Balance of mechanical forces drives endothelial gap formation and may facilitate cancer and immune-cell extravasation. 2018. https://doi.org/10.1101/375931
Essler, M., J. M. Staddon, P. C. Weber, and M. Aepfelbacher. Cyclic AMP blocks bacterial lipopolysaccharide-induced myosin light chain phosphorylation in endothelial cells through inhibition of rho/rho kinase signaling. J. Immunol. 164:6543–6549, 2000.
Fanning, A. S., B. J. Jameson, L. A. Jesaitis, and J. M. Anderson. The tight junction protein ZO-1 establishes a link between the transmembrane protein occludin and the actin cytoskeleton. J. Biol. Chem. 273:29745–29753, 1998.
Goutal, S., M. Gerstenmayer, S. Auvity, F. Caillé, S. Mériaux, I. Buvat, B. Larrat, and N. Tournier. Physical blood–brain barrier disruption induced by focused ultrasound does not overcome the transporter-mediated efflux of erlotinib. J. Control. Release 292:210–220, 2018.
Grammas, P., J. Martinez, and B. Miller. Cerebral microvascular endothelium and the pathogenesis of neurodegenerative diseases. Expert Rev. Mol. Med. 13:e19, 2011.
Hamilla, S. M., K. M. Stroka, and H. Aranda-Espinoza. VE-cadherin-independent cancer cell incorporation into the vascular endothelium precedes transmigration. PLoS ONE 9:e109748, 2014.
Hemphill, M. A., S. Dauth, C. J. Yu, B. E. Dabiri, and K. K. Parker. Traumatic brain injury and the neuronal microenvironment: a potential role for neuropathological mechanotransduction. Neuron 85:1177–1192, 2015.
Hsu, J., D. Serrano, T. Bhowmick, K. Kumar, Y. Shen, Y. C. Kuo, C. Garnacho, and S. Muro. Enhanced endothelial delivery and biochemical effects of α-galactosidase by ICAM-1-targeted nanocarriers for Fabry disease. J. Control. Release 149:323–331, 2011.
Huveneers, S., J. Oldenburg, E. Spanjaard, G. van der Krogt, I. Grigoriev, A. Akhmanova, H. Rehmann, and J. de Rooij. Vinculin associates with endothelial VE-cadherin junctions to control force-dependent remodeling. J. Cell Biol. 196:641–652, 2012.
Kakei, Y., M. Akashi, T. Shigeta, T. Hasegawa, and T. Komori. Alteration of cell–cell junctions in cultured human lymphatic endothelial cells with inflammatory cytokine stimulation. Lymphat. Res. Biol. 12:136–143, 2014.
Katt, M. E., R. M. Linville, L. N. Mayo, Z. S. Xu, and P. C. Searson. Functional brain-specific microvessels from iPSC-derived human brain microvascular endothelial cells: the role of matrix composition on monolayer formation. Fluids Barriers CNS 15:7, 2018.
Klein, E. A., L. Yin, D. Kothapalli, P. Castagnino, F. J. Byfield, T. Xu, I. Levental, E. Hawthorne, P. A. Janmey, and R. K. Assoian. Cell-cycle control by physiological matrix elasticity and in vivo tissue stiffening. Curr. Biol. 19:1511–1518, 2009.
Kohn, J. C., M. C. Lampi, and C. A. Reinhart-King. Age-related vascular stiffening: causes and consequences. Front. Genet. 6:112, 2015.
Kothapalli, D., S.-L. Liu, Y. H. Bae, J. Monslow, T. Xu, E. A. Hawthorne, F. J. Byfield, P. Castagnino, S. Rao, D. J. Rader, E. Puré, M. C. Phillips, S. Lund-Katz, P. A. Janmey, and R. K. Assoian. Cardiovascular protection by ApoE and ApoE-HDL linked to suppression of ECM gene expression and arterial stiffening. Cell Rep. 2:1259–1271, 2012.
Krishnan, R., D. D. Klumpers, C. Y. Park, K. Rajendran, X. Trepat, J. van Bezu, V. W. M. M. van Hinsbergh, C. V. Carman, J. D. Brain, J. J. Fredberg, J. P. Butler, and G. P. van Nieuw Amerongen. Substrate stiffening promotes endothelial monolayer disruption through enhanced physical forces. Am. J. Physiol. Cell Physiol. 300:146–154, 2011.
Li, A. Q., L. Zhao, T. F. Zhou, M. Q. Zhang, and X. M. Qin. Exendin-4 promotes endothelial barrier enhancement via PKA-and Epac1-dependent Rac1 activation. Am. J. Physiol. Physiol. 308:C164–C175, 2015.
Li, B., W.-D. Zhao, Z.-M. Tan, W.-G. Fang, L. Zhu, and Y.-H. Chen. Involvement of Rho/ROCK signalling in small cell lung cancer migration through human brain microvascular endothelial cells. FEBS Lett. 580:4252–4260, 2006.
Li, C.-H., M.-K. Shyu, C. Jhan, Y.-W. Cheng, C.-H. Tsai, C.-W. Liu, C.-C. Lee, R.-M. Chen, and J.-J. Kang. Gold nanoparticles increase endothelial paracellular permeability by altering components of endothelial tight junctions, and increase blood-brain barrier permeability in mice. Toxicol. Sci. 148:192–203, 2015.
Mckee, C. T., J. A. Last, P. Russell, and C. J. Murphy. Indentation vs. tensile measurements of young’s modulus for soft biological tissues. Tissue Eng. Part B 17:155–164, 2011.
McRae, M. P., L. M. LaFratta, B. M. Nguyen, J. J. Paris, K. F. Hauser, and D. E. Conway. Characterization of cell-cell junction changes associated with the formation of a strong endothelial barrier. Tissue Barriers 6:1–9, 2018.
Mesiwala, A. H., L. Farrell, H. J. Wenzel, D. L. Silbergeld, L. A. Crum, H. R. Winn, and P. D. Mourad. High-intensity focused ultrasound selectively disrupts the blood-brain barrier in vivo. Ultrasound Med. Biol. 28:389–400, 2002.
Mierke, C. T., N. Bretz, and P. Altevogt. Contractile forces contribute to increased glycosylphosphatidylinositol-anchored receptor CD24-facilitated cancer cell invasion. J. Biol. Chem. 286:34858–34871, 2011.
Newell-Litwa, K. A., R. Horwitz, and M. L. Lamers. Non-muscle myosin II in disease: mechanisms and therapeutic opportunities. Dis. Model. Mech. 8:1495–1515, 2015.
Nieuw Amerongen, V. G. P., C. M. L. Beckers, I. D. Achekar, S. Zeeman, R. J. P. Musters, and V. W. M. Van Hinsbergh. Involvement of Rho kinase in endothelial barrier maintenance. Arterioscler. Thromb. Vasc. Biol. 27:2332–2339, 2007.
Nitz, T., T. Eisenblatter, K. Psathaki, and H.-J. Gaï. Serum-derived factors weaken the barrier properties of cultured porcine brain capillary endothelial cells in vitro. Brain Res. 981:30–40, 2003.
Onken, M. D., O. L. Mooren, S. Mukherjee, S. T. Shahan, J. Li, and J. A. Cooper. Endothelial monolayers and transendothelial migration depend on mechanical properties of the substrate. Cytoskeleton 71:695–706, 2014.
Peloquin, J., J. Huynh, R. M. Williams, and C. A. Reinhart-King. Indentation measurements of the subendothelial matrix in bovine carotid arteries. J. Biomech. 44:815–821, 2011.
Raman, P. S., C. D. Paul, K. M. Stroka, and K. Konstantopoulos. Probing cell traction forces in confined microenvironments. Lab Chip 13:4599–4607, 2013.
Semyachkina-Glushkovskaya, O., J. Kurths, E. Borisova, S. Sokolovski, V. Mantareva, I. Angelov, A. Shirokov, N. Navolokin, N. Shushunova, A. Khorovodov, M. Ulanova, M. Sagatova, I. Agranivich, O. Sindeeva, A. Gekalyuk, A. Bodrova, and E. Rafailov. Photodynamic opening of blood-brain barrier. Biomed. Opt. Express 8:5040–5048, 2017.
Sheikov, N., N. McDannold, N. Vykhodtseva, F. Jolesz, and K. Hynynen. Cellular mechanisms of the blood-brain barrier opening induced by ultrasound in presence of microbubbles. Ultrasound Med. Biol. 30:979–989, 2004.
Stroka, K. M., and H. Aranda-espinoza. Neutrophils display biphasic relationship between migration and substrate stiffness. Cell Motil. Cytoskeleton 66:328–341, 2009.
Stroka, K. M., and H. Aranda-Espinoza. Endothelial cell substrate stiffness influences neutrophil transmigration via myosin light chain kinase-dependent cell contraction. Blood 118:1632–1640, 2011.
Stroka, K. M., I. Levitan, and H. Aranda-Espinoza. OxLDL and substrate stiffness promote neutrophil transmigration by enhanced endothelial cell contractility and ICAM-1. J. Biomech. 45:1828–1834, 2012.
Tornavaca, O., M. Chia, N. Dufton, L. O. Almagro, D. E. Conway, A. M. Randi, M. A. Schwartz, K. Matter, and M. S. Balda. ZO-1 controls endothelial adherens junctions, cell–cell tension, angiogenesis, and barrier formation. J. Cell Biol. 208:821–838, 2015.
Wallez, Y., and P. Huber. Endothelial adherens and tight junctions in vascular homeostasis, inflammation and angiogenesis. Biochim. Biophys. Acta Biomembr. 1778:794–809, 2008.
Wang, Y. L., and R. J. Pelham. Preparation of a flexible, porous polyacrylamide substrate for mechanical studies of cultured cells. Methods Enzymol. 298:489–496, 1998.
Wilhelm, I., C. Fazakas, and I. A. Krizbai. In vitro models of the blood-brain barrier. Acta Neurobiol. Exp. 71:113–128, 2011.
Winger, R. C., J. E. Koblinski, T. Kanda, R. M. Ransohoff, and W. A. Muller. Rapid remodeling of tight junctions during paracellular diapedesis in a human model of the blood-brain barrier. J. Immunol. 193:2427–2437, 2014.
Wong, K. H. K., J. G. Truslow, and J. Tien. The role of cyclic AMP in normalizing the function of engineered human blood microvessels in microfluidic collagen gels. Biomaterials 31:4706–4714, 2010.
Zieman, S. J., V. Melenovsky, and D. A. Kass. Mechanisms, pathophysiology, and therapy of arterial stiffness. Aterioscler. Thromb. Vasc. Biol. 25:932–943, 2005
Acknowledgments
The authors acknowledge Kyle Thomas at Yellow Basket, LLC (kyle@yellowbasket.io) for software development support. The authors also acknowledge funding from the Burroughs Wellcome Career Award at the Scientific Interface (to KMS), the Fischell Fellowship in Biomedical Engineering and the Dr. Mabel S. Spencer Award for Excellence in Graduate Achievement (to KMG), and the University of Maryland.
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10439_2019_2266_MOESM1_ESM.pdf
Supplementary material 1 See supplementary material for the determination of JAnaP thresholds (Figs. S1–S3) and program validation (Table S.I.), full statistical analysis (Table S.II-S.V), additional shape factors for Figs. 3–5 (Figs. S4, S6, and S5), correlation between junction and monolayer coverage (Fig. S7), and for the AFM method and results (Method S1 and Fig. S5) (PDF 1562 kb)
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Gray, K.M., Katz, D.B., Brown, E.G. et al. Quantitative Phenotyping of Cell–Cell Junctions to Evaluate ZO-1 Presentation in Brain Endothelial Cells. Ann Biomed Eng 47, 1675–1687 (2019). https://doi.org/10.1007/s10439-019-02266-5
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DOI: https://doi.org/10.1007/s10439-019-02266-5
Keywords
- Matrix stiffness
- Mechanotransduction
- Mechanobiology
- Blood–brain barrier