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Liu S, Han Y, Kong L, Wang G, Ye Z. Atomic force microscopy in disease-related studies: Exploring tissue and cell mechanics. Microsc Res Tech 2024; 87:660-684. [PMID: 38063315 DOI: 10.1002/jemt.24471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2023] [Revised: 10/22/2023] [Accepted: 11/26/2023] [Indexed: 03/02/2024]
Abstract
Despite significant progress in human medicine, certain diseases remain challenging to promptly diagnose and treat. Hence, the imperative lies in the development of more exhaustive criteria and tools. Tissue and cellular mechanics exhibit distinctive traits in both normal and pathological states, suggesting that "force" represents a promising and distinctive target for disease diagnosis and treatment. Atomic force microscopy (AFM) holds great promise as a prospective clinical medical device due to its capability to concurrently assess surface morphology and mechanical characteristics of biological specimens within a physiological setting. This review presents a comprehensive examination of the operational principles of AFM and diverse mechanical models, focusing on its applications in investigating tissue and cellular mechanics associated with prevalent diseases. The findings from these studies lay a solid groundwork for potential clinical implementations of AFM. RESEARCH HIGHLIGHTS: By examining the surface morphology and assessing tissue and cellular mechanics of biological specimens in a physiological setting, AFM shows promise as a clinical device to diagnose and treat challenging diseases.
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Affiliation(s)
- Shuaiyuan Liu
- Key Laboratory for Biorheological Science and Technology of Ministry of Education, State and Local Joint Engineering Laboratory for Vascular Implants, Bioengineering College of Chongqing University, Chongqing, China
| | - Yibo Han
- Key Laboratory for Biorheological Science and Technology of Ministry of Education, State and Local Joint Engineering Laboratory for Vascular Implants, Bioengineering College of Chongqing University, Chongqing, China
| | - Lingwen Kong
- Department of Cardiothoracic Surgery, Central Hospital of Chongqing University, Chongqing Emergency Medical Center, Chongqing, China
| | - Guixue Wang
- Key Laboratory for Biorheological Science and Technology of Ministry of Education, State and Local Joint Engineering Laboratory for Vascular Implants, Bioengineering College of Chongqing University, Chongqing, China
- JinFeng Laboratory, Chongqing, China
| | - Zhiyi Ye
- Key Laboratory for Biorheological Science and Technology of Ministry of Education, State and Local Joint Engineering Laboratory for Vascular Implants, Bioengineering College of Chongqing University, Chongqing, China
- JinFeng Laboratory, Chongqing, China
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2
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Roy S, Sharma A, Ghosh S. Macrophage Polarization Profiling on Native and Regenerated Silk Biomaterials. ACS Biomater Sci Eng 2022; 8:659-671. [PMID: 35089695 DOI: 10.1021/acsbiomaterials.1c01432] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
We investigated the plasticity and polarization of THP-1 cells on native and regenerated silk-based biomaterials to address the basic paradigm of immune response. Here, we report redox kinetics, adhesion morphology, and nitric oxide release patterns to identify specific subtypes of macrophages at different time points. Water-annealed silk film and native fibrous braids from Bombyx mori silkworms showed higher anti-inflammatory cytokine profiles or M2 subtypes (as evidenced by the enhanced expression of interleukin-10, interleukin-13, and interleukin-4). Ethanol-treated Bombyx mori silk films and Antheraea mylitta braids exhibited higher levels of pro-inflammatory cytokines or the M1 subtype (as evidenced by enhanced expression of interleukin-1, interleukin-6, interleukin-8, interferon-γ, TNF-α, and GM-CSF) in contact with healthy THP monocytes for 14 days; such a long study is unprecedented. Cytokine microarray analysis revealed the transition (M0-M1, M1-M2), plasticity, and stable phenotype of THP-1 cells in a variable stage in contact with different physicochemical properties of silk-based biomaterials. The detailed immunogenicity in the context of the physicochemical properties of native and regenerative silk-based biomaterials will enable us to accurately predict the possibility of a pro-/anti-inflammatory response. It will helps to predict the in vivo reprogramming and avoid fibrosis formation to enhance their clinical translational potential.
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Affiliation(s)
- Subhadeep Roy
- Regenerative Engineering Laboratory, Department of Textile and Fiber Engineering, Indian Institute of Technology, New Delhi 110016, India
| | - Aarushi Sharma
- Regenerative Engineering Laboratory, Department of Textile and Fiber Engineering, Indian Institute of Technology, New Delhi 110016, India
| | - Sourabh Ghosh
- Regenerative Engineering Laboratory, Department of Textile and Fiber Engineering, Indian Institute of Technology, New Delhi 110016, India
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Biomechanics of Neutrophil Tethers. Life (Basel) 2021; 11:life11060515. [PMID: 34073130 PMCID: PMC8230032 DOI: 10.3390/life11060515] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Revised: 05/22/2021] [Accepted: 05/25/2021] [Indexed: 12/11/2022] Open
Abstract
Leukocytes, including neutrophils, propelled by blood flow, can roll on inflamed endothelium using transient bonds between selectins and their ligands, and integrins and their ligands. When such receptor–ligand bonds last long enough, the leukocyte microvilli become extended and eventually form thin, 20 µm long tethers. Tether formation can be observed in blood vessels in vivo and in microfluidic flow chambers. Tethers can also be extracted using micropipette aspiration, biomembrane force probe, optical trap, or atomic force microscopy approaches. Here, we review the biomechanical properties of leukocyte tethers as gleaned from such measurements and discuss the advantages and disadvantages of each approach. We also review and discuss viscoelastic models that describe the dependence of tether formation on time, force, rate of loading, and cell activation. We close by emphasizing the need to combine experimental observations with quantitative models and computer simulations to understand how tether formation is affected by membrane tension, membrane reservoir, and interactions of the membrane with the cytoskeleton.
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Puzzi L, Borin D, Gurha P, Lombardi R, Martinelli V, Weiss M, Andolfi L, Lazzarino M, Mestroni L, Marian AJ, Sbaizero O. Knock Down of Plakophillin 2 Dysregulates Adhesion Pathway through Upregulation of miR200b and Alters the Mechanical Properties in Cardiac Cells. Cells 2019; 8:cells8121639. [PMID: 31847412 PMCID: PMC6952926 DOI: 10.3390/cells8121639] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 12/08/2019] [Accepted: 12/11/2019] [Indexed: 01/06/2023] Open
Abstract
Background: Mutations in genes encoding intercalated disk/desmosome proteins, such as plakophilin 2 (PKP2), cause arrhythmogenic cardiomyopathy (ACM). Desmosomes are responsible for myocyte–myocyte attachment and maintaining mechanical integrity of the myocardium. Methods: We knocked down Pkp2 in HL-1 mouse atrial cardiomyocytes (HL-1Pkp2-shRNA) and characterized their biomechanical properties. Gene expression was analyzed by RNA-Sequencing, microarray, and qPCR. Immunofluorescence was used to detect changes in cytoskeleton and focal adhesion. Antagomirs were used to knock down expression of selected microRNA (miR) in the rescue experiments. Results: Knockdown of Pkp2 was associated with decreased cardiomyocyte stiffness and work of detachment, and increased plasticity index. Altered mechanical properties were associated with impaired actin cytoskeleton in HL-1Pkp2-shRNA cells. Analysis of differentially expressed genes identified focal adhesion and actin cytoskeleton amongst the most dysregulated pathways, and miR200 family (a, b, and 429) as the most upregulated miRs in HL-1Pkp2-shRNA cells. Knockdown of miR-200b but not miR-200a, miR-429, by sequence-specific shRNAs partially rescued integrin-α1 (Itga1) levels, actin organization, cell adhesion (on collagen), and stiffness. Conclusions: PKP2 deficiency alters cardiomyocytes adhesion through a mechanism that involves upregulation of miR-200b and suppression of Itga1 expression. These findings provide new insights into the molecular basis of altered mechanosensing in ACM.
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Affiliation(s)
- Luca Puzzi
- Engineering and Architecture Department, University of Trieste, 34127 Trieste, Italy; (L.P.); (D.B.)
| | - Daniele Borin
- Engineering and Architecture Department, University of Trieste, 34127 Trieste, Italy; (L.P.); (D.B.)
| | - Priyatansh Gurha
- Centre for Cardiovascular Genetics, Institute of Molecular Medicine at the University of Texas Health Science Centre and Texas Heart Institute, Houston, TX 77030, USA; (P.G.); (A.J.M.)
| | - Raffaella Lombardi
- Advanced Biomedical Sciences, Federico II University, 80138 Napoli, Italy;
| | - Valentina Martinelli
- International Centre for Genetic Engineering and Biotechnology, 34149 Trieste, Italy;
| | - Marek Weiss
- Institute of Physics, Faculty of Technical Physics, Poznan University of Technology, Piotrowo 3, 60965 Poznan, Poland
| | - Laura Andolfi
- CNR-IOM, Area Science Park, 34149 Trieste, Italy; (L.A.); (M.L.)
| | - Marco Lazzarino
- CNR-IOM, Area Science Park, 34149 Trieste, Italy; (L.A.); (M.L.)
| | - Luisa Mestroni
- Cardiovascular Institute, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA;
| | - Ali J. Marian
- Centre for Cardiovascular Genetics, Institute of Molecular Medicine at the University of Texas Health Science Centre and Texas Heart Institute, Houston, TX 77030, USA; (P.G.); (A.J.M.)
| | - Orfeo Sbaizero
- Engineering and Architecture Department, University of Trieste, 34127 Trieste, Italy; (L.P.); (D.B.)
- Correspondence: ; Tel.: +39-040-558-3770
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5
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Regulation of cell migration by α4 and α9 integrins. Biochem J 2019; 476:705-718. [PMID: 30819933 DOI: 10.1042/bcj20180415] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Revised: 02/09/2019] [Accepted: 02/12/2019] [Indexed: 12/15/2022]
Abstract
Integrins are heterodimeric transmembrane receptors that play an essential role in enabling cells to sense and bind to extracellular ligands. Activation and clustering of integrins leads to the formation of focal adhesions at the plasma membrane that subsequently initiate signalling pathways to control a broad range of functional endpoints including cell migration, proliferation and survival. The α4 and α9 integrins form a small sub-family of receptors that share some specific ligands and binding partners. Although relatively poorly studied compared with other integrin family members, emerging evidence suggests that despite restricted cell and tissue expression profiles, these integrins play a key role in the regulation of signalling pathways controlling cytoskeletal remodelling and migration in both adherent and non-adherent cell types. This review summarises the known shared and specific roles for α4 and α9 integrins and highlights the importance of these receptors in controlling cell migration within both homeostatic and disease settings.
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Marcotti S, Maki K, Reilly GC, Lacroix D, Adachi T. Hyaluronic acid selective anchoring to the cytoskeleton: An atomic force microscopy study. PLoS One 2018; 13:e0206056. [PMID: 30359403 PMCID: PMC6201909 DOI: 10.1371/journal.pone.0206056] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Accepted: 10/07/2018] [Indexed: 11/19/2022] Open
Abstract
The hyaluronic acid component of the glycocalyx plays a role in cell mechanotransduction by selectively transmitting mechanical signals to the cell cytoskeleton or to the cell membrane. The aim of this study was to evaluate the mechanical link between the hyaluronic acid molecule and the cell cytoskeleton by means of atomic force microscopy single molecule force spectroscopy. Hyaluronic acid molecules on live cells were targeted with probes coated with hyaluronic acid binding protein. Two different types of events were observed when the detachment of the target molecule from the probe occurred, suggesting the presence of cytoskeleton- and membrane-anchored molecules. Membrane-anchored molecules facilitated the formation of tethers when pulled. About 15% of the tested hyaluronic acid molecules were shown to be anchored to the cytoskeleton. When multiple molecules bonded to the probe, specific detachment patterns were observed, suggesting that a cytoskeletal bond needed to be broken to improve the ability to pull tethers from the cell membrane. This likely resulted in the formation of tethering structures maintaining a cytoskeletal core similar to the ones observed for cells over-expressing HA synthases. The different observed rupture events were associated with separate mechanotransductive mechanisms in an analogous manner to that previously proposed for the endothelial glycocalyx. Single cytoskeleton anchored rupture events represent HA molecules linked to the cytoskeleton and therefore transmitting mechanical stimuli into the inner cell compartments. Single membrane tethers would conversely represent the glycocalyx molecules connected to areas of the membrane where an abundance of signalling molecules reside.
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Affiliation(s)
- Stefania Marcotti
- Insigneo Institute for in silico Medicine, University of Sheffield, Sheffield, United Kingdom
- Department of Mechanical Engineering, University of Sheffield, Sheffield, United Kingdom
- Randall Centre for Cell and Molecular Biophysics, King’s College London, London, United Kingdom
| | - Koichiro Maki
- Department of Biosystems Science, Institute for Frontier Life and Medical Sciences, Kyoto University, Kyoto, Japan
- Department of Mechanical Engineering, University of Tokyo, Tokyo, Japan
| | - Gwendolen C. Reilly
- Insigneo Institute for in silico Medicine, University of Sheffield, Sheffield, United Kingdom
- Department of Materials Science and Engineering, University of Sheffield, Sheffield, United Kingdom
| | - Damien Lacroix
- Insigneo Institute for in silico Medicine, University of Sheffield, Sheffield, United Kingdom
- Department of Mechanical Engineering, University of Sheffield, Sheffield, United Kingdom
| | - Taiji Adachi
- Department of Biosystems Science, Institute for Frontier Life and Medical Sciences, Kyoto University, Kyoto, Japan
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7
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Chang WC, Yu YM, Cheng AC. Curcumin suppresses pro-inflammatory adhesion response in Human Umbilical Vein Endothelial Cells. J Food Biochem 2018. [DOI: 10.1111/jfbc.12623] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Weng-Cheng Chang
- Department of Otolaryngology; Taichung Tzu Chi Hospital; Buddhist Tzu Chi Medical Foundation; Taiwan
| | - Ya-Mei Yu
- Department of Senior Citizen Service Management; National Taichung University of Science and Technology; Taichung Taiwan
| | - An-Chin Cheng
- Department of Nutrition and Health Sciences; Chang Jung Christian University; Tainan Taiwan
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Brilha S, Wysoczanski R, Whittington AM, Friedland JS, Porter JC. Monocyte Adhesion, Migration, and Extracellular Matrix Breakdown Are Regulated by Integrin αVβ3 in Mycobacterium tuberculosis Infection. THE JOURNAL OF IMMUNOLOGY 2017. [PMID: 28646039 PMCID: PMC5523580 DOI: 10.4049/jimmunol.1700128] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
In tuberculosis (TB), the innate inflammatory immune response drives tissue destruction, morbidity, and mortality. Monocytes secrete matrix metalloproteinases (MMPs), which have key roles in local tissue destruction and cavitation. We hypothesized that integrin signaling might regulate monocyte MMP secretion in pulmonary TB during cell adhesion to the extracellular matrix (ECM). Adhesion to type I collagen and fibronectin by Mycobacterium tuberculosis-stimulated monocytes increased MMP-1 gene expression by 2.6-fold and 4.3-fold respectively, and secretion by 60% (from 1208.1 ± 186 to 1934.4 ± 135 pg/ml; p < 0.0001) and 63% (1970.3 ± 95 pg/ml; p < 0.001). MMP-10 secretion increased by 90% with binding to type I collagen and 55% with fibronectin, whereas MMP-7 increased 57% with collagen. The ECM did not affect the secretion of tissue inhibitors of metalloproteinases-1 or -2. Integrin αVβ3 surface expression was specifically upregulated in stimulated monocytes and was further increased after adhesion to type I collagen. Binding of either β3 or αV integrin subunits increased MMP-1/10 secretion in M. tuberculosis-stimulated monocytes. In a cohort of TB patients, significantly increased integrin β3 mRNA accumulation in induced sputum was detected, to our knowledge, for the first time, compared with control subjects (p < 0.05). Integrin αVβ3 colocalized with areas of increased and functionally active MMP-1 on infected monocytes, and αVβ3 blockade markedly decreased type I collagen breakdown, and impaired both monocyte adhesion and leukocyte migration in a transwell system (p < 0.0001). In summary, our data demonstrate that M. tuberculosis stimulation upregulates integrin αVβ3 expression on monocytes, which upregulates secretion of MMP-1 and -10 on adhesion to the ECM. This leads to increased monocyte recruitment and collagenase activity, which will drive inflammatory tissue damage.
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Affiliation(s)
- Sara Brilha
- Department of Infectious Diseases and Immunity, Imperial College London, London W12 0NN, United Kingdom.,Centre for Inflammation and Tissue Repair, Respiratory Medicine, University College London, London WC1E 6JF, United Kingdom; and
| | - Riccardo Wysoczanski
- Department of Infectious Diseases and Immunity, Imperial College London, London W12 0NN, United Kingdom.,Centre for Molecular Medicine, University College London, London WC1E 6JF, United Kingdom
| | - Ashley M Whittington
- Department of Infectious Diseases and Immunity, Imperial College London, London W12 0NN, United Kingdom
| | - Jon S Friedland
- Department of Infectious Diseases and Immunity, Imperial College London, London W12 0NN, United Kingdom;
| | - Joanna C Porter
- Centre for Inflammation and Tissue Repair, Respiratory Medicine, University College London, London WC1E 6JF, United Kingdom; and
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9
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Malek-Zietek KE, Targosz-Korecka M, Szymonski M. The impact of hyperglycemia on adhesion between endothelial and cancer cells revealed by single-cell force spectroscopy. J Mol Recognit 2017; 30. [DOI: 10.1002/jmr.2628] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Revised: 02/15/2017] [Accepted: 02/21/2017] [Indexed: 12/28/2022]
Affiliation(s)
- Katarzyna E. Malek-Zietek
- Center for Nanometer-scale Science and Advanced Materials, NANOSAM, Faculty of Physics, Astronomy and Applied Computer Science; Jagiellonian University; Łojasiewicza 11 30-348 Kraków Poland
| | - Marta Targosz-Korecka
- Center for Nanometer-scale Science and Advanced Materials, NANOSAM, Faculty of Physics, Astronomy and Applied Computer Science; Jagiellonian University; Łojasiewicza 11 30-348 Kraków Poland
| | - Marek Szymonski
- Center for Nanometer-scale Science and Advanced Materials, NANOSAM, Faculty of Physics, Astronomy and Applied Computer Science; Jagiellonian University; Łojasiewicza 11 30-348 Kraków Poland
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10
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Kunschmann T, Puder S, Fischer T, Perez J, Wilharm N, Mierke CT. Integrin-linked kinase regulates cellular mechanics facilitating the motility in 3D extracellular matrices. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2016; 1864:580-593. [PMID: 28011283 DOI: 10.1016/j.bbamcr.2016.12.019] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Revised: 12/12/2016] [Accepted: 12/19/2016] [Indexed: 12/12/2022]
Abstract
The motility of cells plays an important role for many processes such as wound healing and malignant progression of cancer. The efficiency of cell motility is affected by the microenvironment. The connection between the cell and its microenvironment is facilitated by cell-matrix adhesion receptors and upon their activation focal adhesion proteins such as integrin-linked kinase (ILK) are recruited to sites of focal adhesion formation. In particular, ILK connects cell-matrix receptors to the actomyosin cytoskeleton. However, ILK's role in cell mechanics regulating cellular motility in 3D collagen matrices is still not well understood. We suggest that ILK facilitates 3D motility by regulating cellular mechanical properties such as stiffness and force transmission. Thus, ILK wild-type and knock-out cells are analyzed for their ability to migrate on 2D substrates serving as control and in dense 3D extracellular matrices. Indeed, ILK wild-type cells migrated faster on 2D substrates and migrated more numerous and deeper in 3D matrices. Hence, we analyzed cellular deformability, Young's modulus (stiffness) and adhesion forces. We found that ILK wild-type cells are less deformable (stiffer) and produce higher cell-matrix adhesion forces compared to ILK knock-out cells. Finally, ILK is essential for providing cellular mechanical stiffness regulating 3D motility.
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Affiliation(s)
- Tom Kunschmann
- University of Leipzig, Faculty of Physics and Earth Science, Institute for Experimental Physics I, Biological Physics Division, Linnestrasse 5, 04103 Leipzig, Germany
| | - Stefanie Puder
- University of Leipzig, Faculty of Physics and Earth Science, Institute for Experimental Physics I, Biological Physics Division, Linnestrasse 5, 04103 Leipzig, Germany
| | - Tony Fischer
- University of Leipzig, Faculty of Physics and Earth Science, Institute for Experimental Physics I, Biological Physics Division, Linnestrasse 5, 04103 Leipzig, Germany
| | - Jeremy Perez
- University of Leipzig, Faculty of Physics and Earth Science, Institute for Experimental Physics I, Biological Physics Division, Linnestrasse 5, 04103 Leipzig, Germany
| | - Nils Wilharm
- University of Leipzig, Faculty of Physics and Earth Science, Institute for Experimental Physics I, Biological Physics Division, Linnestrasse 5, 04103 Leipzig, Germany
| | - Claudia Tanja Mierke
- University of Leipzig, Faculty of Physics and Earth Science, Institute for Experimental Physics I, Biological Physics Division, Linnestrasse 5, 04103 Leipzig, Germany.
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11
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Sariisik E, Popov C, Müller JP, Docheva D, Clausen-Schaumann H, Benoit M. Decoding Cytoskeleton-Anchored and Non-Anchored Receptors from Single-Cell Adhesion Force Data. Biophys J 2016; 109:1330-3. [PMID: 26445433 PMCID: PMC4601042 DOI: 10.1016/j.bpj.2015.07.048] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2015] [Revised: 05/30/2015] [Accepted: 07/22/2015] [Indexed: 12/02/2022] Open
Abstract
Complementary to parameters established for cell-adhesion force curve analysis, we evaluated the slope before a force step together with the distance from the surface at which the step occurs and visualized the result in a two-dimensional density plot. This new tool allows detachment steps of long membrane tethers to be distinguished from shorter jumplike force steps, which are typical for cytoskeleton-anchored bonds. A prostate cancer cell line (PC3) immobilized on an atomic-force-microscopy sensor interacted with three different substrates: collagen-I (Col-I), bovine serum albumin, and a monolayer of bone marrow-derived stem cells (SCP1). To address PC3 cells’ predominant Col-I binding molecules, an antibody-blocking β1-integrin was used. Untreated PC3 cells on Col-I or SCP1 cells, which express Col-I, predominantly showed jumps in their force curves, while PC3 cells on bovine-serum-albumin- and antibody-treated PC3 cells showed long membrane tethers. The probability density plots thus revealed that β1-integrin-specific interactions are predominately anchored to the cytoskeleton, while the nonspecific interactions are mainly membrane-anchored. Experiments with latrunculin-A-treated PC3 cells corroborated these observations. The plots thus reveal details of the anchoring of bonds to the cell and provide a better understanding of receptor-ligand interactions.
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Affiliation(s)
- Ediz Sariisik
- Experimental Surgery and Regenerative Medicine, Department of Surgery, Ludwig-Maximilians-Universität München, Munich, Germany; Center for NanoScience, Ludwig-Maximilians-Universität München, Munich, Germany; Center for Applied Tissue Engineering and Regenerative Medicine, University of Applied Sciences, Munich, Germany
| | - Cvetan Popov
- Experimental Surgery and Regenerative Medicine, Department of Surgery, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Jochen P Müller
- Center for NanoScience, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Denitsa Docheva
- Experimental Surgery and Regenerative Medicine, Department of Surgery, Ludwig-Maximilians-Universität München, Munich, Germany; Center for Applied Tissue Engineering and Regenerative Medicine, University of Applied Sciences, Munich, Germany
| | - Hauke Clausen-Schaumann
- Center for NanoScience, Ludwig-Maximilians-Universität München, Munich, Germany; Center for Applied Tissue Engineering and Regenerative Medicine, University of Applied Sciences, Munich, Germany
| | - Martin Benoit
- Center for NanoScience, Ludwig-Maximilians-Universität München, Munich, Germany; Center for Applied Tissue Engineering and Regenerative Medicine, University of Applied Sciences, Munich, Germany.
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12
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Reinforcement of integrin-mediated T-Lymphocyte adhesion by TNF-induced Inside-out Signaling. Sci Rep 2016; 6:30452. [PMID: 27466027 PMCID: PMC4964354 DOI: 10.1038/srep30452] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Accepted: 07/06/2016] [Indexed: 01/21/2023] Open
Abstract
Integrin-mediated leukocyte adhesion to endothelial cells is a crucial step in immunity against pathogens. Whereas the outside-in signaling pathway in response to the pro-inflammatory cytokine tumour necrosis factor (TNF) has already been studied in detail, little knowledge exists about a supposed TNF-mediated inside-out signaling pathway. In contrast to the outside-in signaling pathway, which relies on the TNF-induced upregulation of surface molecules on endothelium, inside-out signaling should also be present in an endothelium-free environment. Using single-cell force spectroscopy, we show here that stimulating Jurkat cells with TNF significantly reinforces their adhesion to fibronectin in a biomimetic in vitro assay for cell-surface contact times of about 1.5 seconds, whereas for larger contact times the effect disappears. Analysis of single-molecule ruptures further demonstrates that TNF strengthens sub-cellular single rupture events at short cell-surface contact times. Hence, our results provide quantitative evidence for the significant impact of TNF-induced inside-out signaling in the T-lymphocyte initial adhesion machinery.
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Foster GA, Xu L, Chidambaram AA, Soderberg SR, Armstrong EJ, Wu H, Simon SI. CD11c/CD18 Signals Very Late Antigen-4 Activation To Initiate Foamy Monocyte Recruitment during the Onset of Hypercholesterolemia. THE JOURNAL OF IMMUNOLOGY 2015; 195:5380-92. [PMID: 26519532 DOI: 10.4049/jimmunol.1501077] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2015] [Accepted: 10/05/2015] [Indexed: 12/20/2022]
Abstract
Recruitment of foamy monocytes to inflamed endothelium expressing VCAM-1 contributes to the development of plaque during atherogenesis. Foamy CD11c(+) monocytes arise in the circulation during the onset of hypercholesterolemia and recruit to nascent plaque, but the mechanism of CD11c/CD18 and very late Ag-4 (VLA-4) activation and cooperation in shear-resistant cell arrest on VCAM-1 are ill defined. Within 1 wk of the onset of a Western high-fat diet (WD) in apolipoprotein E-deficient mice, an inflammatory subset of foamy monocytes emerged that made up one fourth of the circulating population. These cells expressed ∼3-fold more CD11c/CD18 and 50% higher chemokine receptors than nonfoamy monocytes. Recruitment from blood to a VCAM-1 substrate under shear stress was assessed ex vivo using a unique artery-on-a-chip microfluidic assay. It revealed that foamy monocytes from mice on a WD increased their adhesiveness over 5 wk, rising to twice that of mice on a normal diet or CD11c(-/-) mice fed a WD. Shear-resistant capture of foamy human or mouse monocytes was initiated by high-affinity CD11c, which directly activated VLA-4 adhesion via phosphorylated spleen tyrosine kinase and paxillin within focal adhesion complexes. Lipid uptake and activation of CD11c are early and critical events in signaling VLA-4 adhesive function on foamy monocytes competent to recruit to VCAM-1 on inflamed arterial endothelium.
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Affiliation(s)
- Greg A Foster
- Department of Biomedical Engineering, University of California, Davis, Davis, CA 95616
| | - Lu Xu
- Section of Cardiovascular Research, Department of Medicine, Baylor College of Medicine, Houston, TX 77030
| | - Alagu A Chidambaram
- Department of Biomedical Engineering, University of California, Davis, Davis, CA 95616
| | - Stephanie R Soderberg
- Department of Biomedical Engineering, University of California, Davis, Davis, CA 95616
| | - Ehrin J Armstrong
- Division of Cardiology, VA Eastern Colorado Healthcare System, University of Colorado School of Medicine, Denver, CO 80220; and
| | - Huaizhu Wu
- Section of Cardiovascular Research, Department of Medicine, Baylor College of Medicine, Houston, TX 77030; Section of Leukocyte Biology, Department of Pediatrics, Baylor College of Medicine, Houston, TX 77030
| | - Scott I Simon
- Department of Biomedical Engineering, University of California, Davis, Davis, CA 95616;
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Mortimer L, Moreau F, Cornick S, Chadee K. The NLRP3 Inflammasome Is a Pathogen Sensor for Invasive Entamoeba histolytica via Activation of α5β1 Integrin at the Macrophage-Amebae Intercellular Junction. PLoS Pathog 2015; 11:e1004887. [PMID: 25955828 PMCID: PMC4425650 DOI: 10.1371/journal.ppat.1004887] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2015] [Accepted: 04/16/2015] [Indexed: 12/22/2022] Open
Abstract
Entamoeba histolytica (Eh) is an extracellular protozoan parasite of humans that invades the colon to cause life-threatening intestinal and extra-intestinal amebiasis. Colonized Eh is asymptomatic, however, when trophozoites adhere to host cells there is a considerable inflammatory response that is critical in the pathogenesis of amebiasis. The host and/or parasite factors that trigger the inflammatory response to invading Eh are not well understood. We recently identified that Eh adherence to macrophages induces inflammasome activation and in the present study we sought to determine the molecular events upon contact that coordinates this response. Here we report that Eh contact-dependent activation of α5β1 integrin is critical for activation of the NLRP3 inflammasome. Eh-macrophage contact triggered recruitment of α5β1 integrin and NLRP3 into the intercellular junction, where α5β1 integrin underwent activation by an integrin-binding cysteine protease on the parasite surface, termed EhCP5. As a result of its activation, α5β1 integrin induced ATP release into the extracellular space through opening of pannexin-1 channels that signalled through P2X7 receptors to deliver a critical co-stimulatory signal that activated the NLRP3 inflammasome. Both the cysteine protease activity and integrin-binding domain of EhCP5 were required to trigger α5β1 integrin that led to ATP release and NLRP3 inflammasome activation. These findings reveal engagement of α5β1 integrin across the parasite-host junction is a key regulatory step that initiates robust inflammatory responses to Eh. We propose that α5β1 integrin distinguishes Eh direct contact and functions with NLRP3 as pathogenicity sensor for invasive Eh infection. Amebiasis caused by the enteric protozoan parasite Entamoeba histolytica is among the three top causes of death from parasitic infections worldwide, as a result of amebic colitis (dysentery) and liver or brain abscess. When Eh invades the intestinal barrier and contacts host tissue there is a profound inflammatory response, which is thought to drive the disease. One of the central outstanding questions has been how the immune response is escalated at sites of invasion. Adherence of the parasite to host cells has long been appreciated in the pathogenesis of amebiasis, but was never considered as a “cue” that host cells use to detect Eh and initiate host defense. Here we introduce the idea, and demonstrate, that an intercellular junction forms between Eh and host cells upon contact that engages the NLRP3 inflammasome. The NLRP3 inflammasome belongs to a group of “danger” sensors that are uniquely designed to rapidly activate highly inflammatory host defenses. In this work, we identified a surface receptor on macrophages that normally functions in adhesion and polarization recognizes a protein on the outer surface of Eh. Intriguingly, Eh also secretes this protein. However, the full activation of the surface receptor leading to inflammasome activation only occurs when the Eh protein is immobilized on the parasite surface. Thus, we uncovered a molecular mechanism though which host cells distinguish direct contact, and therefore recognize parasites that are immediately present in the tissue, to mobilize a highly inflammatory response. We believe this concept is central to understanding the biology of amebiasis.
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Affiliation(s)
- Leanne Mortimer
- Department of Microbiology, Immunology and Infectious Diseases, Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Alberta, Canada
| | - France Moreau
- Department of Microbiology, Immunology and Infectious Diseases, Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Alberta, Canada
| | - Steve Cornick
- Department of Microbiology, Immunology and Infectious Diseases, Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Alberta, Canada
| | - Kris Chadee
- Department of Microbiology, Immunology and Infectious Diseases, Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Alberta, Canada
- * E-mail:
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15
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Maciaszek JL, Partola K, Zhang J, Andemariam B, Lykotrafitis G. Single-cell force spectroscopy as a technique to quantify human red blood cell adhesion to subendothelial laminin. J Biomech 2014; 47:3855-61. [PMID: 25458578 DOI: 10.1016/j.jbiomech.2014.10.016] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2013] [Revised: 09/18/2014] [Accepted: 10/11/2014] [Indexed: 01/16/2023]
Abstract
Single-cell force spectroscopy (SCFS), an atomic force microscopy (AFM)-based assay, enables quantitative study of cell adhesion while maintaining the native state of surface receptors in physiological conditions. Human healthy and pathological red blood cells (RBCs) express a large number of surface proteins which mediate cell-cell interactions, or cell adhesion to the extracellular matrix. In particular, RBCs adhere with high affinity to subendothelial matrix laminin via the basal cell adhesion molecule and Lutheran protein (BCAM/Lu). Here, we established SCFS as an in vitro technique to study human RBC adhesion at baseline and following biochemical treatment. Using blood obtained from healthy human subjects, we recorded adhesion forces from single RBCs attached to AFM cantilevers as the cell was pulled-off of substrates coated with laminin protein. We found that an increase in the overall cell adhesion measured via SCFS is correlated with an increase in the resultant total force measured on 1 µm(2) areas of the RBC membrane. Further, we showed that SCFS can detect significant changes in the adhesive response of RBCs to modulation of the cyclic adenosine monophosphate (cAMP) and protein kinase A (PKA) pathway. Lastly, we identified variability in the RBC adhesion force to laminin amongst the human subjects, suggesting that RBCs maintain diverse levels of active BCAM/Lu adhesion receptors. By using single-cell measurements, we established a powerful new method for the quantitative measurement of single RBC adhesion with specific receptor-mediated binding.
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Affiliation(s)
- Jamie L Maciaszek
- Department of Biomedical Engineering, University of Connecticut, Storrs, CT, USA; Department of Hematology, Division of Experimental Hematology, St. Jude Children's Research Hospital, Memphis, TN, USA
| | - Kostyantyn Partola
- Department of Mechanical Engineering, University of Connecticut, Storrs, CT, USA
| | - Jing Zhang
- Department of Mechanical Engineering, University of Connecticut, Storrs, CT, USA
| | - Biree Andemariam
- Adult Sickle Cell Disease Center, University of Connecticut Health Center, Farmington, CT, USA
| | - George Lykotrafitis
- Department of Biomedical Engineering, University of Connecticut, Storrs, CT, USA; Department of Mechanical Engineering, University of Connecticut, Storrs, CT, USA.
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16
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Celik E, Faridi MH, Kumar V, Deep S, Moy VT, Gupta V. Agonist leukadherin-1 increases CD11b/CD18-dependent adhesion via membrane tethers. Biophys J 2014; 105:2517-27. [PMID: 24314082 DOI: 10.1016/j.bpj.2013.10.020] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2013] [Revised: 10/09/2013] [Accepted: 10/18/2013] [Indexed: 01/13/2023] Open
Abstract
Integrin CD11b/CD18 is a key adhesion receptor that mediates leukocyte migration and immune functions. Leukadherin-1 (LA1) is a small molecule agonist that enhances CD11b/CD18-dependent cell adhesion to its ligand ICAM-1. Here, we used single-molecule force spectroscopy to investigate the biophysical mechanism by which LA1-activated CD11b/CD18 mediates leukocyte adhesion. Between the two distinct populations of CD11b/CD18:ICAM-1 complex that participate in cell adhesion, the cytoskeleton(CSK)-anchored elastic elements and the membrane tethers, we found that LA1 enhanced binding of CD11b/CD18 on K562 cells to ICAM-1 via the formation of long membrane tethers, whereas Mn(2+) additionally increased ICAM-1 binding via CSK-anchored bonds. LA1 activated wild-type and LFA1(-/-) neutrophils also showed longer detachment distances and time from ICAM-1-coated atomic force microscopy tips, but significantly lower detachment force, as compared to the Mn(2+)-activated cells, confirming that LA1 primarily increased membrane-tether bonds to enhance CD11b/CD18:ICAM-1 binding, whereas Mn(2+) induced additional CSK-anchored bond formation. The results suggest that the two types of agonists differentially activate integrins and couple them to the cellular machinery, providing what we feel are new insights into signal mechanotransduction by such agents.
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Affiliation(s)
- Emrah Celik
- Department of Physiology and Biophysics, University of Miami Miller School of Medicine, Miami, Florida
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17
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Schubert R, Strohmeyer N, Bharadwaj M, Ramanathan SP, Krieg M, Friedrichs J, Franz CM, Muller DJ. Assay for characterizing the recovery of vertebrate cells for adhesion measurements by single-cell force spectroscopy. FEBS Lett 2014; 588:3639-48. [PMID: 24928443 DOI: 10.1016/j.febslet.2014.06.012] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2014] [Revised: 05/30/2014] [Accepted: 06/02/2014] [Indexed: 11/30/2022]
Abstract
Single-cell force spectroscopy (SCFS) is becoming a widely used method to quantify the adhesion of a living cell to a substrate, another cell or tissue. The high sensitivity of SCFS permits determining the contributions of individual cell adhesion molecules (CAMs) to the adhesion force of an entire cell. However, to prepare adherent cells for SCFS, they must first be detached from tissue-culture flasks or plates. EDTA and trypsin are often applied for this purpose. Because cellular properties can be affected by this treatment, cells need to recover before being further characterized by SCFS. Here we introduce atomic force microscopy (AFM)-based SCFS to measure the mechanical and adhesive properties of HeLa cells and mouse embryonic kidney fibroblasts while they are recovering after detachment from tissue-culture. We find that mechanical and adhesive properties of both cell lines recover quickly (<10 min) after detachment using EDTA, while trypsin-detached fibroblasts require >60 min to fully recover. Our assay introduced to characterize the recovery of mammalian cells after detachment can in future be used to estimate the recovery behavior of other adherent cell types.
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Affiliation(s)
- Rajib Schubert
- Department of Biosystems Science and Engineering, ETH Zurich, Mattenstrasse 26, 4058 Basel, Switzerland
| | - Nico Strohmeyer
- Department of Biosystems Science and Engineering, ETH Zurich, Mattenstrasse 26, 4058 Basel, Switzerland
| | - Mitasha Bharadwaj
- Department of Biosystems Science and Engineering, ETH Zurich, Mattenstrasse 26, 4058 Basel, Switzerland
| | - Subramanian P Ramanathan
- Department of Biosystems Science and Engineering, ETH Zurich, Mattenstrasse 26, 4058 Basel, Switzerland
| | - Michael Krieg
- Department of Molecular and Cellular Physiology, Stanford University, Stanford, CA 94305, USA
| | - Jens Friedrichs
- Leibniz Institute of Polymer Research Dresden, Institute for Biofunctional Polymer Materials, Hohe Str. 6, 01069 Dresden, Germany
| | - Clemens M Franz
- Karlsruhe Institute of Technology (KIT), DFG-Center for Functional Nanostructures, Wolfgang-Gaede-Str. 1a, 76131 Karlsruhe, Germany
| | - Daniel J Muller
- Department of Biosystems Science and Engineering, ETH Zurich, Mattenstrasse 26, 4058 Basel, Switzerland.
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18
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Laurent VM, Duperray A, Sundar Rajan V, Verdier C. Atomic force microscopy reveals a role for endothelial cell ICAM-1 expression in bladder cancer cell adherence. PLoS One 2014; 9:e98034. [PMID: 24857933 PMCID: PMC4032264 DOI: 10.1371/journal.pone.0098034] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2014] [Accepted: 04/28/2014] [Indexed: 12/22/2022] Open
Abstract
Cancer metastasis is a complex process involving cell-cell interactions mediated by cell adhesive molecules. In this study we determine the adhesion strength between an endothelial cell monolayer and tumor cells of different metastatic potentials using Atomic Force Microscopy. We show that the rupture forces of receptor-ligand bonds increase with retraction speed and range between 20 and 70 pN. It is shown that the most invasive cell lines (T24, J82) form the strongest bonds with endothelial cells. Using ICAM-1 coated substrates and a monoclonal antibody specific for ICAM-1, we demonstrate that ICAM-1 serves as a key receptor on endothelial cells and that its interactions with ligands expressed by tumor cells are correlated with the rupture forces obtained with the most invasive cancer cells (T24, J82). For the less invasive cancer cells (RT112), endothelial ICAM-1 does not seem to play any role in the adhesion process. Moreover, a detailed analysis of the distribution of rupture forces suggests that ICAM-1 interacts preferentially with one ligand on T24 cancer cells and with two ligands on J82 cancer cells. Possible counter receptors for these interactions are CD43 and MUC1, two known ligands for ICAM-1 which are expressed by these cancer cells.
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Affiliation(s)
- Valérie M. Laurent
- Univ. Grenoble Alpes, LIPHY, F-38000, Grenoble, France
- CNRS, LIPHY, F-38000, Grenoble, France
- * E-mail:
| | - Alain Duperray
- INSERM, IAB, F-38000, Grenoble, France
- Univ. Grenoble Alpes, IAB, F-38000, Grenoble, France
- CHU de Grenoble, IAB, F-38000, Grenoble, France
| | - Vinoth Sundar Rajan
- INSERM, IAB, F-38000, Grenoble, France
- Univ. Grenoble Alpes, IAB, F-38000, Grenoble, France
- CHU de Grenoble, IAB, F-38000, Grenoble, France
| | - Claude Verdier
- Univ. Grenoble Alpes, LIPHY, F-38000, Grenoble, France
- CNRS, LIPHY, F-38000, Grenoble, France
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19
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Bai R, Bai H, Kuse M, Ideta A, Aoyagi Y, Fujiwara H, Okuda K, Imakawa K, Sakurai T. Involvement of VCAM1 in the bovine conceptus adhesion to the uterine endometrium. Reproduction 2014; 148:119-27. [PMID: 24803492 DOI: 10.1530/rep-13-0655] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Following bidirectional communication, the conceptus and the uterine epithelium must establish a proper cell-cell interaction, resulting in the progression of implantation processes. To clarify the mechanism of conceptus attachment to the uterine endometrium, we studied whether vascular cell adhesion molecule (VCAM1) was expressed in bovine conceptuses or endometrium during the peri-attachment period. Uterine VCAM1 expression was minimal in day 17 (day 0=day of estrus) cyclic and pregnant animals, but increased between days 20 and 22 of pregnancy. In the intercaruncular regions, VCAM1 protein was localized to the luminal and glandular epithelia, whereas in the caruncular regions, VCAM1 protein was detected in the stroma and endothelia of the uterine endometrium. In cultured endometrial epithelial cells (EECs), VCAM1 expression was up-regulated when treated with uterine flushings or growth factor and further increased when EECs were cocultured with bovine trophoblast CT1 cells. VCAM1 expression in CT1 cells was also up-regulated with the use of uterine flushings, and further increased when these cells were cocultured with EECs. Expression of VCAM1 receptor, integrin α 4 (ITGA4) mRNA, increased significantly in day 22 conceptuses. In day 22 pregnant uteri, VCAM1 protein was found in both EECs and conceptuses, but ITGA4 was localized only to trophoblasts. These observations indicate that cell-cell interactions between conceptuses and uterine epithelial cells are required for sufficient VCAM1 and ITGA4 expression in the bovine species and suggest that uterine VCAM1 and conceptus ITGA4 play a role in the establishment of conceptus adhesion to the uterine endometrium.
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Affiliation(s)
- Rulan Bai
- Laboratory of Theriogenology and Animal BreedingGraduate School of Agricultural and Life Science, the University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, JapanLaboratory of Reproductive PhysiologyGraduate School of Environmental and Life Science, Okayama University, Okayama 700-8530, JapanZennoh Embryo Transfer CenterKamishihoro, Hokkaido 080-1407, JapanFaculty of MedicineInstitute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa 920-5111, Japan
| | - Hanako Bai
- Laboratory of Theriogenology and Animal BreedingGraduate School of Agricultural and Life Science, the University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, JapanLaboratory of Reproductive PhysiologyGraduate School of Environmental and Life Science, Okayama University, Okayama 700-8530, JapanZennoh Embryo Transfer CenterKamishihoro, Hokkaido 080-1407, JapanFaculty of MedicineInstitute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa 920-5111, Japan
| | - Mariko Kuse
- Laboratory of Theriogenology and Animal BreedingGraduate School of Agricultural and Life Science, the University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, JapanLaboratory of Reproductive PhysiologyGraduate School of Environmental and Life Science, Okayama University, Okayama 700-8530, JapanZennoh Embryo Transfer CenterKamishihoro, Hokkaido 080-1407, JapanFaculty of MedicineInstitute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa 920-5111, Japan
| | - Atsushi Ideta
- Laboratory of Theriogenology and Animal BreedingGraduate School of Agricultural and Life Science, the University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, JapanLaboratory of Reproductive PhysiologyGraduate School of Environmental and Life Science, Okayama University, Okayama 700-8530, JapanZennoh Embryo Transfer CenterKamishihoro, Hokkaido 080-1407, JapanFaculty of MedicineInstitute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa 920-5111, Japan
| | - Yoshito Aoyagi
- Laboratory of Theriogenology and Animal BreedingGraduate School of Agricultural and Life Science, the University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, JapanLaboratory of Reproductive PhysiologyGraduate School of Environmental and Life Science, Okayama University, Okayama 700-8530, JapanZennoh Embryo Transfer CenterKamishihoro, Hokkaido 080-1407, JapanFaculty of MedicineInstitute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa 920-5111, Japan
| | - Hiroshi Fujiwara
- Laboratory of Theriogenology and Animal BreedingGraduate School of Agricultural and Life Science, the University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, JapanLaboratory of Reproductive PhysiologyGraduate School of Environmental and Life Science, Okayama University, Okayama 700-8530, JapanZennoh Embryo Transfer CenterKamishihoro, Hokkaido 080-1407, JapanFaculty of MedicineInstitute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa 920-5111, Japan
| | - Kiyoshi Okuda
- Laboratory of Theriogenology and Animal BreedingGraduate School of Agricultural and Life Science, the University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, JapanLaboratory of Reproductive PhysiologyGraduate School of Environmental and Life Science, Okayama University, Okayama 700-8530, JapanZennoh Embryo Transfer CenterKamishihoro, Hokkaido 080-1407, JapanFaculty of MedicineInstitute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa 920-5111, Japan
| | - Kazuhiko Imakawa
- Laboratory of Theriogenology and Animal BreedingGraduate School of Agricultural and Life Science, the University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, JapanLaboratory of Reproductive PhysiologyGraduate School of Environmental and Life Science, Okayama University, Okayama 700-8530, JapanZennoh Embryo Transfer CenterKamishihoro, Hokkaido 080-1407, JapanFaculty of MedicineInstitute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa 920-5111, Japan
| | - Toshihiro Sakurai
- Laboratory of Theriogenology and Animal BreedingGraduate School of Agricultural and Life Science, the University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, JapanLaboratory of Reproductive PhysiologyGraduate School of Environmental and Life Science, Okayama University, Okayama 700-8530, JapanZennoh Embryo Transfer CenterKamishihoro, Hokkaido 080-1407, JapanFaculty of MedicineInstitute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa 920-5111, Japan
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