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Li Z, Li X, Lin J, Wang Y, Cao H, Zhou J. Reevaluation by the CRISPR/Cas9 knockout approach revealed that multiple pluripotency-associated lncRNAs are dispensable for pluripotency maintenance while Snora73a/b is essential for pluripotency exit. SCIENCE CHINA. LIFE SCIENCES 2024:10.1007/s11427-023-2594-3. [PMID: 38995489 DOI: 10.1007/s11427-023-2594-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2024] [Accepted: 03/15/2024] [Indexed: 07/13/2024]
Abstract
Many long noncoding RNAs (lncRNAs) have been identified through siRNA-based screening as essential regulators of embryonic stem cell (ESC) pluripotency. However, the biological and molecular functions of most lncRNAs remain unclear. Here, we employed CRISPR/Cas9-mediated knockout technology to explore the functions of 8 lncRNAs previously reported to promote pluripotency in mouse ESCs. Unexpectedly, all of these lncRNAs were dispensable for pluripotency maintenance and proliferation in mouse ESCs when disrupted individually or in combination. Single-cell transcriptomic analysis also showed that the knockout of these lncRNAs has a minimal impact on pluripotency gene expression and cell identity. We further showed that several small hairpin RNAs (shRNAs) previously used to knock down lncRNAs caused the downregulation of pluripotency genes in the corresponding lncRNA-knockout ESCs, indicating that off-target effects likely responsible for the pluripotency defects caused by these shRNAs. Interestingly, linc1343-knockout and linc1343-knockdown ESCs failed to form cystic structures and exhibited high expression of pluripotency genes during embryoid body (EB) differentiation. By reintroducing RNA products generated from the linc1343 locus, we found that two snoRNAs, Snora73a and Snora73b, but not lncRNAs, could rescue pluripotency silencing defects during EB differentiation of linc1343 knockout ESCs. Our results suggest that the 8 previously annotated pluripotency-regulating lncRNAs have no overt functions in conventional ESC culture; however, we identified snoRNA products derived from an annotated lncRNA locus as essential regulators for silencing pluripotency genes.
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Affiliation(s)
- Zhen Li
- Institute of Molecular Medicine, College of Future Technology, Peking University, Beijing, 100871, China
| | - Xuefei Li
- Dermatology Hospital, Southern Medical University, Guangzhou, 510091, China
| | - Jingxia Lin
- Dermatology Hospital, Southern Medical University, Guangzhou, 510091, China
| | - Yangming Wang
- Institute of Molecular Medicine, College of Future Technology, Peking University, Beijing, 100871, China
- Beijing Advanced Center of RNA Biology (BEACON), Peking University, Beijing, 100871, China
| | - Huiqing Cao
- Institute of Molecular Medicine, College of Future Technology, Peking University, Beijing, 100871, China.
| | - Jiajian Zhou
- Dermatology Hospital, Southern Medical University, Guangzhou, 510091, China.
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2
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Bae M, Ngo H, Kang YJ, Lee SJ, Park W, Jo Y, Choi YM, Kim JJ, Yi HG, Kim HS, Jang J, Cho DW, Cho H. Laminin-Augmented Decellularized Extracellular Matrix Ameliorating Neural Differentiation and Neuroinflammation in Human Mini-Brains. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2308815. [PMID: 38161254 DOI: 10.1002/smll.202308815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Revised: 11/21/2023] [Indexed: 01/03/2024]
Abstract
Non-neural extracellular matrix (ECM) has limited application in humanized physiological neural modeling due to insufficient brain-specificity and safety concerns. Although brain-derived ECM contains enriched neural components, certain essential components are partially lost during the decellularization process, necessitating augmentation. Here, it is demonstrated that the laminin-augmented porcine brain-decellularized ECM (P-BdECM) is xenogeneic factor-depleted as well as favorable for the regulation of human neurons, astrocytes, and microglia. P-BdECM composition is comparable to human BdECM regarding brain-specificity through the matrisome and gene ontology-biological process analysis. As augmenting strategy, laminin 111 supplement promotes neural function by synergic effect with laminin 521 in P-BdECM. Annexin A1(ANXA1) and Peroxiredoxin(PRDX) in P-BdECM stabilized microglial and astrocytic behavior under normal while promoting active neuroinflammation in response to neuropathological factors. Further, supplementation of the brain-specific molecule to non-neural matrix also ameliorated glial cell inflammation as in P-BdECM. In conclusion, P-BdECM-augmentation strategy can be used to recapitulate humanized pathophysiological cerebral environments for neurological study.
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Affiliation(s)
- Mihyeon Bae
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Kyungbuk, 37673, South Korea
| | - Huyen Ngo
- Department of Biophysics, Institute of Quantum Biophysics, Department of Intelligent Precision Healthcare Convergence, Sungkyunkwan University, Suwon, Gyeonggi, 16419, South Korea
| | - You Jung Kang
- Department of Biophysics, Institute of Quantum Biophysics, Department of Intelligent Precision Healthcare Convergence, Sungkyunkwan University, Suwon, Gyeonggi, 16419, South Korea
| | - Su-Jin Lee
- Biomedical Research Institute, Chonnam National University Hospital, Gwangju, 61469, South Korea
| | - Wonbin Park
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Kyungbuk, 37673, South Korea
| | - Yeonggwon Jo
- School of Interdisciplinary Bioscience and Bioengineering, Pohang University of Science and Technology (POSTECH), Pohang, Kyungbuk, 37673, South Korea
| | - Yoo-Mi Choi
- Department of Convergence IT Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Kyungbuk, 37673, South Korea
| | - Joeng Ju Kim
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Kyungbuk, 37673, South Korea
| | - Hee-Gyeong Yi
- Department of Convergence Biosystems Engineering, College of Agriculture and Life Sciences, Chonnam National University, Gwangju, 61186, South Korea
| | - Hyung-Seok Kim
- Department of Forensic medicine, Chonnam National University Medical School & Research Institute of Medical Sciences, Gwangju, 61469, South Korea
| | - Jinah Jang
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Kyungbuk, 37673, South Korea
- School of Interdisciplinary Bioscience and Bioengineering, Pohang University of Science and Technology (POSTECH), Pohang, Kyungbuk, 37673, South Korea
- Institute for Convergence Research and Education in Advanced Technology, Yonsei University, Seoul, 03722, Republic of Korea
| | - Dong-Woo Cho
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Kyungbuk, 37673, South Korea
| | - Hansang Cho
- Department of Biophysics, Institute of Quantum Biophysics, Department of Intelligent Precision Healthcare Convergence, Sungkyunkwan University, Suwon, Gyeonggi, 16419, South Korea
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3
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Noro J, Vilaça-Faria H, Reis RL, Pirraco RP. Extracellular matrix-derived materials for tissue engineering and regenerative medicine: A journey from isolation to characterization and application. Bioact Mater 2024; 34:494-519. [PMID: 38298755 PMCID: PMC10827697 DOI: 10.1016/j.bioactmat.2024.01.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 12/19/2023] [Accepted: 01/03/2024] [Indexed: 02/02/2024] Open
Abstract
Biomaterial choice is an essential step during the development tissue engineering and regenerative medicine (TERM) applications. The selected biomaterial must present properties allowing the physiological-like recapitulation of several processes that lead to the reestablishment of homeostatic tissue or organ function. Biomaterials derived from the extracellular matrix (ECM) present many such properties and their use in the field has been steadily increasing. Considering this growing importance, it becomes imperative to provide a comprehensive overview of ECM biomaterials, encompassing their sourcing, processing, and integration into TERM applications. This review compiles the main strategies used to isolate and process ECM-derived biomaterials as well as different techniques used for its characterization, namely biochemical and chemical, physical, morphological, and biological. Lastly, some of their applications in the TERM field are explored and discussed.
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Affiliation(s)
- Jennifer Noro
- 3B's Research Group, I3Bs – Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017, Barco, Guimarães, Portugal
- ICVS/3B's – PT Government Associate Laboratory, Braga, Guimarães, Portugal
| | - Helena Vilaça-Faria
- 3B's Research Group, I3Bs – Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017, Barco, Guimarães, Portugal
- ICVS/3B's – PT Government Associate Laboratory, Braga, Guimarães, Portugal
| | - Rui L. Reis
- 3B's Research Group, I3Bs – Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017, Barco, Guimarães, Portugal
- ICVS/3B's – PT Government Associate Laboratory, Braga, Guimarães, Portugal
| | - Rogério P. Pirraco
- 3B's Research Group, I3Bs – Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017, Barco, Guimarães, Portugal
- ICVS/3B's – PT Government Associate Laboratory, Braga, Guimarães, Portugal
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4
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Martins‐Costa C, Pham VA, Sidhaye J, Novatchkova M, Wiegers A, Peer A, Möseneder P, Corsini NS, Knoblich JA. Morphogenesis and development of human telencephalic organoids in the absence and presence of exogenous extracellular matrix. EMBO J 2023; 42:e113213. [PMID: 37842725 PMCID: PMC10646563 DOI: 10.15252/embj.2022113213] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Revised: 09/08/2023] [Accepted: 09/14/2023] [Indexed: 10/17/2023] Open
Abstract
The establishment and maintenance of apical-basal polarity is a fundamental step in brain development, instructing the organization of neural progenitor cells (NPCs) and the developing cerebral cortex. Particularly, basally located extracellular matrix (ECM) is crucial for this process. In vitro, epithelial polarization can be achieved via endogenous ECM production, or exogenous ECM supplementation. While neuroepithelial development is recapitulated in neural organoids, the effects of different ECM sources in tissue morphogenesis remain underexplored. Here, we show that exposure to a solubilized basement membrane matrix substrate, Matrigel, at early neuroepithelial stages causes rapid tissue polarization and rearrangement of neuroepithelial architecture. In cultures exposed to pure ECM components or unexposed to any exogenous ECM, polarity acquisition is slower and driven by endogenous ECM production. After the onset of neurogenesis, tissue architecture and neuronal differentiation are largely independent of the initial ECM source, but Matrigel exposure has long-lasting effects on tissue patterning. These results advance the knowledge on mechanisms of exogenously and endogenously guided morphogenesis, demonstrating the self-sustainability of neuroepithelial cultures by endogenous processes.
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Affiliation(s)
- Catarina Martins‐Costa
- Institute of Molecular Biotechnology of the Austrian Academy of Sciences (IMBA), Vienna BioCenterViennaAustria
- Vienna BioCenter PhD ProgramDoctoral School of the University of Vienna and Medical University of ViennaViennaAustria
| | - Vincent A Pham
- Institute of Molecular Biotechnology of the Austrian Academy of Sciences (IMBA), Vienna BioCenterViennaAustria
| | - Jaydeep Sidhaye
- Institute of Molecular Biotechnology of the Austrian Academy of Sciences (IMBA), Vienna BioCenterViennaAustria
| | - Maria Novatchkova
- Institute of Molecular Biotechnology of the Austrian Academy of Sciences (IMBA), Vienna BioCenterViennaAustria
| | - Andrea Wiegers
- Institute of Molecular Biotechnology of the Austrian Academy of Sciences (IMBA), Vienna BioCenterViennaAustria
| | - Angela Peer
- Institute of Molecular Biotechnology of the Austrian Academy of Sciences (IMBA), Vienna BioCenterViennaAustria
| | - Paul Möseneder
- Institute of Molecular Biotechnology of the Austrian Academy of Sciences (IMBA), Vienna BioCenterViennaAustria
| | - Nina S Corsini
- Institute of Molecular Biotechnology of the Austrian Academy of Sciences (IMBA), Vienna BioCenterViennaAustria
| | - Jürgen A Knoblich
- Institute of Molecular Biotechnology of the Austrian Academy of Sciences (IMBA), Vienna BioCenterViennaAustria
- Department of NeurologyMedical University of ViennaViennaAustria
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5
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Kechagia Z, Sáez P, Gómez-González M, Canales B, Viswanadha S, Zamarbide M, Andreu I, Koorman T, Beedle AEM, Elosegui-Artola A, Derksen PWB, Trepat X, Arroyo M, Roca-Cusachs P. The laminin-keratin link shields the nucleus from mechanical deformation and signalling. NATURE MATERIALS 2023; 22:1409-1420. [PMID: 37709930 PMCID: PMC10627833 DOI: 10.1038/s41563-023-01657-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Accepted: 07/31/2023] [Indexed: 09/16/2023]
Abstract
The mechanical properties of the extracellular matrix dictate tissue behaviour. In epithelial tissues, laminin is a very abundant extracellular matrix component and a key supporting element. Here we show that laminin hinders the mechanoresponses of breast epithelial cells by shielding the nucleus from mechanical deformation. Coating substrates with laminin-111-unlike fibronectin or collagen I-impairs cell response to substrate rigidity and YAP nuclear localization. Blocking the laminin-specific integrin β4 increases nuclear YAP ratios in a rigidity-dependent manner without affecting the cell forces or focal adhesions. By combining mechanical perturbations and mathematical modelling, we show that β4 integrins establish a mechanical linkage between the substrate and keratin cytoskeleton, which stiffens the network and shields the nucleus from actomyosin-mediated mechanical deformation. In turn, this affects the nuclear YAP mechanoresponses, chromatin methylation and cell invasion in three dimensions. Our results demonstrate a mechanism by which tissues can regulate their sensitivity to mechanical signals.
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Affiliation(s)
- Zanetta Kechagia
- Institute for Bioengineering of Catalonia (IBEC), Barcelona Institute of Science and Technology (BIST), Barcelona, Spain.
| | - Pablo Sáez
- Laboratori de Càlcul Numèric (LàCaN), Universitat Politècnica de Catalunya, Barcelona, Spain
- Institut de Matemátiques de la UPC-BarcelonaTech (IMTech), Barcelona, Spain
| | - Manuel Gómez-González
- Institute for Bioengineering of Catalonia (IBEC), Barcelona Institute of Science and Technology (BIST), Barcelona, Spain
| | - Brenda Canales
- Cell and Tissue Mechanobiology Laboratory, The Francis Crick Institute, London, UK
- Department of Physics, King's College London, London, UK
| | - Srivatsava Viswanadha
- Institute for Bioengineering of Catalonia (IBEC), Barcelona Institute of Science and Technology (BIST), Barcelona, Spain
| | | | - Ion Andreu
- Institute for Bioengineering of Catalonia (IBEC), Barcelona Institute of Science and Technology (BIST), Barcelona, Spain
- Instituto Biofisika (UPV/EHU, CSIC), University of the Basque Country, Leioa, Spain
- Ikerbasque, Basque Foundation for Science, Bilbao, Spain
| | - Thijs Koorman
- Department of Pathology, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Amy E M Beedle
- Institute for Bioengineering of Catalonia (IBEC), Barcelona Institute of Science and Technology (BIST), Barcelona, Spain
- Department of Physics, King's College London, London, UK
| | - Alberto Elosegui-Artola
- Cell and Tissue Mechanobiology Laboratory, The Francis Crick Institute, London, UK
- Department of Physics, King's College London, London, UK
| | - Patrick W B Derksen
- Department of Pathology, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Xavier Trepat
- Institute for Bioengineering of Catalonia (IBEC), Barcelona Institute of Science and Technology (BIST), Barcelona, Spain
- University of Barcelona, Barcelona, Spain
- Centro de Investigación Biomédica en Red en Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Barcelona, Spain
- Institució Catalana de Recerca i Estudis Avançats (ICREA), Barcelona, Spain
| | - Marino Arroyo
- Institute for Bioengineering of Catalonia (IBEC), Barcelona Institute of Science and Technology (BIST), Barcelona, Spain
- Laboratori de Càlcul Numèric (LàCaN), Universitat Politècnica de Catalunya, Barcelona, Spain
- Institut de Matemátiques de la UPC-BarcelonaTech (IMTech), Barcelona, Spain
- Centre Internacional de Mètodes Numèrics en Enginyeria (CIMNE), Barcelona, Spain
| | - Pere Roca-Cusachs
- Institute for Bioengineering of Catalonia (IBEC), Barcelona Institute of Science and Technology (BIST), Barcelona, Spain.
- University of Barcelona, Barcelona, Spain.
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6
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Li Y, Cai H, Yang J, Xie X, Pei S, Wu Y, Zhang J, Song G, Zhang J, Zhang Q, Chi H, Yang G. Decoding tumor heterogeneity in uveal melanoma: basement membrane genes as novel biomarkers and therapeutic targets revealed by multi-omics approaches for cancer immunotherapy. Front Pharmacol 2023; 14:1264345. [PMID: 37822877 PMCID: PMC10562578 DOI: 10.3389/fphar.2023.1264345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Accepted: 09/15/2023] [Indexed: 10/13/2023] Open
Abstract
Background: Uveal melanoma (UVM) is a primary intraocular malignancy that poses a significant threat to patients' visual function and life. The basement membrane (BM) is critical for establishing and maintaining cell polarity, adult function, embryonic and organ morphogenesis, and many other biological processes. Some basement membrane protein genes have been proven to be prognostic biomarkers for various cancers. This research aimed to develop a novel risk assessment system based on BMRGs that would serve as a theoretical foundation for tailored and accurate treatment. Methods: We used gene expression profiles and clinical data from the TCGA-UVM cohort of 80 UVM patients as a training set. 56 UVM patients from the combined cohort of GSE84976 and GSE22138 were employed as an external validation dataset. Prognostic characteristics of basement membrane protein-related genes (BMRGs) were characterized by Lasso, stepwise multifactorial Cox. Multivariate analysis revealed BMRGs to be independent predictors of UVM. The TISCH database probes the crosstalk of BMEGs in the tumor microenvironment at the single-cell level. Finally, we investigated the function of ITGA5 in UVM using multiple experimental techniques, including CCK8, transwell, wound healing assay, and colony formation assay. Results: There are three genes in the prognostic risk model (ADAMTS10, ADAMTS14, and ITGA5). After validation, we determined that the model is quite reliable and accurately forecasts the prognosis of UVM patients. Immunotherapy is more likely to be beneficial for UVM patients in the high-risk group, whereas the survival advantage may be greater for UVM patients in the low-risk group. Knockdown of ITGA5 expression was shown to inhibit the proliferation, migration, and invasive ability of UVM cells in vitro experiments. Conclusion: The 3-BMRGs feature model we constructed has excellent predictive performance which plays a key role in the prognosis, informing the individualized treatment of UVM patients. It also provides a new perspective for assessing pre-immune efficacy.
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Affiliation(s)
- Yunyue Li
- Queen Mary College, Medical School of Nanchang University, Nanchang, China
| | - Huabao Cai
- Department of Neurosurgery, First Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Jinyan Yang
- School of Stomatology, Southwest Medical University, Luzhou, China
| | - Xixi Xie
- School of Stomatology, Southwest Medical University, Luzhou, China
| | - Shengbin Pei
- Department of Breast Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Yifan Wu
- Department of Breast Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Jinhao Zhang
- School of Stomatology, Southwest Medical University, Luzhou, China
| | - Guobin Song
- School of Stomatology, Southwest Medical University, Luzhou, China
| | - Jieying Zhang
- First Teaching Hospital of Tianjin University of Traditional Chinese Medicine, Tianjin, China
| | - Qinhong Zhang
- Heilongjiang University of Chinese Medicine, Harbin, China
| | - Hao Chi
- Clinical Medical College, Southwest Medical University, Luzhou, China
| | - Guanhu Yang
- Department of Specialty Medicine, Ohio University, Athens, OH, United States
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7
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Oh SY, Na SB, Kang YK, Do JT. In Vitro Embryogenesis and Gastrulation Using Stem Cells in Mice and Humans. Int J Mol Sci 2023; 24:13655. [PMID: 37686459 PMCID: PMC10563085 DOI: 10.3390/ijms241713655] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Revised: 08/29/2023] [Accepted: 08/31/2023] [Indexed: 09/10/2023] Open
Abstract
During early mammalian embryonic development, fertilized one-cell embryos develop into pre-implantation blastocysts and subsequently establish three germ layers through gastrulation during post-implantation development. In recent years, stem cells have emerged as a powerful tool to study embryogenesis and gastrulation without the need for eggs, allowing for the generation of embryo-like structures known as synthetic embryos or embryoids. These in vitro models closely resemble early embryos in terms of morphology and gene expression and provide a faithful recapitulation of early pre- and post-implantation embryonic development. Synthetic embryos can be generated through a combinatorial culture of three blastocyst-derived stem cell types, such as embryonic stem cells, trophoblast stem cells, and extraembryonic endoderm cells, or totipotent-like stem cells alone. This review provides an overview of the progress and various approaches in studying in vitro embryogenesis and gastrulation in mice and humans using stem cells. Furthermore, recent findings and breakthroughs in synthetic embryos and gastruloids are outlined. Despite ethical considerations, synthetic embryo models hold promise for understanding mammalian (including humans) embryonic development and have potential implications for regenerative medicine and developmental research.
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Affiliation(s)
| | | | | | - Jeong Tae Do
- Department of Stem Cell Regenerative Biotechnology, Konkuk Institute of Technology, Konkuk University, Seoul 05029, Republic of Korea; (S.Y.O.); (S.B.N.); (Y.K.K.)
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8
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Hislop J, Alavi A, Song Q, Schoenberger R, Kamyar KF, LeGraw R, Velazquez J, Mokhtari T, Taheri MN, Rytel M, de Sousa Lopes SMC, Watkins S, Stolz D, Kiani S, Sozen B, Bar-Joseph Z, Ebrahimkhani MR. Modelling Human Post-Implantation Development via Extra-Embryonic Niche Engineering. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.06.15.545118. [PMID: 37398391 PMCID: PMC10312773 DOI: 10.1101/2023.06.15.545118] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/04/2023]
Abstract
Implantation of the human embryo commences a critical developmental stage that comprises profound morphogenetic alteration of embryonic and extra-embryonic tissues, axis formation, and gastrulation events. Our mechanistic knowledge of this window of human life remains limited due to restricted access to in vivo samples for both technical and ethical reasons. Additionally, human stem cell models of early post-implantation development with both embryonic and extra-embryonic tissue morphogenesis are lacking. Here, we present iDiscoid, produced from human induced pluripotent stem cells via an engineered a synthetic gene circuit. iDiscoids exhibit reciprocal co-development of human embryonic tissue and engineered extra-embryonic niche in a model of human post-implantation. They exhibit unanticipated self-organization and tissue boundary formation that recapitulates yolk sac-like tissue specification with extra-embryonic mesoderm and hematopoietic characteristics, the formation of bilaminar disc-like embryonic morphology, the development of an amniotic-like cavity, and acquisition of an anterior-like hypoblast pole and posterior-like axis. iDiscoids offer an easy-to-use, high-throughput, reproducible, and scalable platform to probe multifaceted aspects of human early post-implantation development. Thus, they have the potential to provide a tractable human model for drug testing, developmental toxicology, and disease modeling.
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Affiliation(s)
- Joshua Hislop
- Department of Bioengineering, Swanson School of Engineering, University of Pittsburgh, Pittsburgh, PA 15261, USA
- Department of Pathology, Division of Experimental Pathology, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15213, USA
- Pittsburgh Liver Research Center, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Amir Alavi
- Computational Biology Department, School of Computer Science, Carnegie Mellon University, Pittsburgh, PA, USA
- Machine Learning Department, School of Computer Science, Carnegie Mellon University, Pittsburgh, PA, USA
| | - Qi Song
- Computational Biology Department, School of Computer Science, Carnegie Mellon University, Pittsburgh, PA, USA
- Machine Learning Department, School of Computer Science, Carnegie Mellon University, Pittsburgh, PA, USA
| | - Rayna Schoenberger
- Department of Bioengineering, Swanson School of Engineering, University of Pittsburgh, Pittsburgh, PA 15261, USA
- Pittsburgh Liver Research Center, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Keshavarz F. Kamyar
- Department of Bioengineering, Swanson School of Engineering, University of Pittsburgh, Pittsburgh, PA 15261, USA
- Department of Pathology, Division of Experimental Pathology, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15213, USA
- Pittsburgh Liver Research Center, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Ryan LeGraw
- Department of Pathology, Division of Experimental Pathology, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15213, USA
- Pittsburgh Liver Research Center, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Jeremy Velazquez
- Department of Pathology, Division of Experimental Pathology, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15213, USA
- Pittsburgh Liver Research Center, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Tahere Mokhtari
- Department of Bioengineering, Swanson School of Engineering, University of Pittsburgh, Pittsburgh, PA 15261, USA
- Department of Pathology, Division of Experimental Pathology, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15213, USA
- Pittsburgh Liver Research Center, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Mohammad Nasser Taheri
- Department of Bioengineering, Swanson School of Engineering, University of Pittsburgh, Pittsburgh, PA 15261, USA
- Department of Pathology, Division of Experimental Pathology, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15213, USA
- Pittsburgh Liver Research Center, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Matthew Rytel
- Department of Pathology, Division of Experimental Pathology, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15213, USA
- Pittsburgh Liver Research Center, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Susana M Chuva de Sousa Lopes
- Department of Anatomy and Embryology, Leiden University Medical Center, Einthovenweg, 2333 ZC Leiden, the Netherlands
| | - Simon Watkins
- Center for Biologic Imaging, University of Pittsburgh, Pittsburgh, PA, USA
- Department of Cell Biology and Molecular Physiology, University of Pittsburgh, Pittsburgh, PA, USA
| | - Donna Stolz
- Center for Biologic Imaging, University of Pittsburgh, Pittsburgh, PA, USA
- Department of Cell Biology and Molecular Physiology, University of Pittsburgh, Pittsburgh, PA, USA
| | - Samira Kiani
- Department of Bioengineering, Swanson School of Engineering, University of Pittsburgh, Pittsburgh, PA 15261, USA
- Department of Pathology, Division of Experimental Pathology, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15213, USA
- Pittsburgh Liver Research Center, University of Pittsburgh, Pittsburgh, PA 15261, USA
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA 15219, USA
| | - Berna Sozen
- Department of Genetics, Yale School of Medicine, Yale University, New Haven, CT, 06510, USA
| | - Ziv Bar-Joseph
- Computational Biology Department, School of Computer Science, Carnegie Mellon University, Pittsburgh, PA, USA
- Machine Learning Department, School of Computer Science, Carnegie Mellon University, Pittsburgh, PA, USA
| | - Mo R. Ebrahimkhani
- Department of Bioengineering, Swanson School of Engineering, University of Pittsburgh, Pittsburgh, PA 15261, USA
- Department of Pathology, Division of Experimental Pathology, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15213, USA
- Pittsburgh Liver Research Center, University of Pittsburgh, Pittsburgh, PA 15261, USA
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA 15219, USA
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9
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Sampaio LP, Martinez VV, Shiju TM, Hilgert GSL, Santhiago MR, Wilson SE. Cell Biology of Spontaneous Persistent Epithelial Defects After Photorefractive Keratectomy in Rabbits. Transl Vis Sci Technol 2023; 12:15. [PMID: 37184499 DOI: 10.1167/tvst.12.5.15] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2023] Open
Abstract
Purpose To evaluate wound healing in rabbit corneas that developed a spontaneous persistent epithelial defect (PED) after photorefractive keratectomy (PRK). Methods Forty-eight 10- to 15-week-old female New Zealand White rabbits weighing 2.5 to 3.0 kg underwent either -3 diopter (D) or -9 D PRK to generate a series of corneas to study wound healing after injury. During that series, seven corneas developed a PED detected with 1% fluorescein staining at a slit lamp that either did not have epithelial closure by 1 week after surgery or subsequently had the closed epithelium break down to form a PED 2 to 3 weeks after surgery. The corneas had slit-lamp photography, with and without 1% fluorescein, and were removed from the normal PRK series. Each PED cornea was evaluated using immunohistochemistry for the myofibroblast marker α-smooth muscle actin (α-SMA), keratocyte marker keratocan, and mesenchymal cell marker vimentin, as well as basement membrane components perlecan and collagen type IV. Results All seven corneas that had PRK with a PED, even the two evaluated at only 1 week after PRK, had α-SMA-positive myofibroblasts populating the anterior stroma within the PED, along with comingled α-SMA-negative cells that were likely corneal fibroblasts and possibly bone marrow-derived fibrocytes. Both perlecan and collagen type IV accumulated in the anterior stroma of the epithelial defects without an epithelial basement membrane, likely produced by corneal fibroblasts to modulate transforming growth factor-β entering the stroma from the tears and peripheral epithelium. Conclusions Corneas with a PED that occurred following PRK (a procedure that produces a transient neurotropic state in the cornea) had myofibroblasts populating the superficial stroma within the epithelial defect as early as 1 week after the surgery. Translational Relevance Pharmacologic treatments that trigger myofibroblast apoptosis, including topical losartan, could facilitate decreased scarring fibrosis in corneas with a PED.
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Affiliation(s)
- Lycia Pedral Sampaio
- Cole Eye Institute, Cleveland Clinic, Cleveland, OH, USA
- Department of Ophthalmology at University of São Paulo, São Paulo, Brazil
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10
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Petrosyan A, Villani V, Aguiari P, Thornton ME, Wang Y, Rajewski A, Zhou S, Cravedi P, Grubbs BH, De Filippo RE, Sedrakyan S, Lemley KV, Csete M, Da Sacco S, Perin L. Identification and Characterization of the Wilms Tumor Cancer Stem Cell. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023:e2206787. [PMID: 37114795 PMCID: PMC10369255 DOI: 10.1002/advs.202206787] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Revised: 03/24/2023] [Indexed: 06/19/2023]
Abstract
A nephrogenic progenitor cell (NP) with cancer stem cell characteristics driving Wilms tumor (WT) using spatial transcriptomics, bulk and single cell RNA sequencing, and complementary in vitro and transplantation experiments is identified and characterized. NP from WT samples with NP from the developing human kidney is compared. Cells expressing SIX2 and CITED1 fulfill cancer stem cell criteria by reliably recapitulating WT in transplantation studies. It is shown that self-renewal versus differentiation in SIX2+CITED1+ cells is regulated by the interplay between integrins ITGβ1 and ITGβ4. The spatial transcriptomic analysis defines gene expression maps of SIX2+CITED1+ cells in WT samples and identifies the interactive gene networks involved in WT development. These studies define SIX2+CITED1+ cells as the nephrogenic-like cancer stem cells of WT and points to the renal developmental transcriptome changes as a possible driver in regulating WT formation and progression.
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Affiliation(s)
- Astgik Petrosyan
- GOFARR Laboratory, Children's Hospital Los Angeles, Division of Urology, Saban Research Institute, Los Angeles, CA, 90027, USA
- Keck School of Medicine, University of Southern California, Los Angeles, CA, 90033, USA
| | - Valentina Villani
- GOFARR Laboratory, Children's Hospital Los Angeles, Division of Urology, Saban Research Institute, Los Angeles, CA, 90027, USA
| | - Paola Aguiari
- GOFARR Laboratory, Children's Hospital Los Angeles, Division of Urology, Saban Research Institute, Los Angeles, CA, 90027, USA
- David Geffen School of Medicine at UCLA - VA Healthcare System, Los Angeles, CA, 90095, USA
| | - Matthew E Thornton
- Department of Obstetrics and Gynecology, Keck School of Medicine, University of Southern California, Los Angeles, CA, 90033, USA
| | - Yizhou Wang
- Genomics Core, Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA, 90048, USA
| | - Alex Rajewski
- Genomics Core, Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA, 90048, USA
| | - Shengmei Zhou
- Department of Pathology and Laboratory Medicine, Children's Hospital Los Angeles, Los Angeles, CA, 90027, USA
| | - Paolo Cravedi
- Department of Medicine, Division of Nephrology and Translational Transplant Research Center, Recanati Miller Transplant Institute, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
| | - Brendan H Grubbs
- Department of Obstetrics and Gynecology, Keck School of Medicine, University of Southern California, Los Angeles, CA, 90033, USA
| | - Roger E De Filippo
- GOFARR Laboratory, Children's Hospital Los Angeles, Division of Urology, Saban Research Institute, Los Angeles, CA, 90027, USA
- Keck School of Medicine, University of Southern California, Los Angeles, CA, 90033, USA
| | - Sargis Sedrakyan
- GOFARR Laboratory, Children's Hospital Los Angeles, Division of Urology, Saban Research Institute, Los Angeles, CA, 90027, USA
- Keck School of Medicine, University of Southern California, Los Angeles, CA, 90033, USA
| | - Kevin V Lemley
- Keck School of Medicine, University of Southern California, Los Angeles, CA, 90033, USA
- Children's Hospital Los Angeles, Division of Nephrology, Department of Pediatrics, University of Southern California, Los Angeles, CA, 90027, USA
| | - Marie Csete
- Department of Anesthesiology, University of Southern California, Los Angeles, CA, 90033, USA
| | - Stefano Da Sacco
- GOFARR Laboratory, Children's Hospital Los Angeles, Division of Urology, Saban Research Institute, Los Angeles, CA, 90027, USA
- Keck School of Medicine, University of Southern California, Los Angeles, CA, 90033, USA
| | - Laura Perin
- GOFARR Laboratory, Children's Hospital Los Angeles, Division of Urology, Saban Research Institute, Los Angeles, CA, 90027, USA
- Keck School of Medicine, University of Southern California, Los Angeles, CA, 90033, USA
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11
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Amel A, Rossouw S, Goolam M. Gastruloids: A Novel System for Disease Modelling and Drug Testing. Stem Cell Rev Rep 2023; 19:104-113. [PMID: 36308705 DOI: 10.1007/s12015-022-10462-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/03/2022] [Indexed: 01/29/2023]
Abstract
By virtue of its inaccessible nature, mammalian implantation stage development has remained one of the most enigmatic and hard to investigate periods of embryogenesis. Derived from pluripotent stem cells, gastruloids recapitulate key aspects of gastrula-stage embryos and have emerged as a powerful in vitro tool to study the architectural features of early post-implantation embryos. While the majority of the work in this emerging field has focused on the use of gastruloids to model embryogenesis, their tractable nature and suitability for high-throughput scaling, has presented an unprecedented opportunity to investigate both developmental and environmental aberrations to the embryo as they occur in vitro. This review summarises the recent developments in the use of gastruloids to model congenital anomalies, their usage in teratogenicity testing, and the current limitations of this emerging field.
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Affiliation(s)
- Atoosa Amel
- Department of Human Biology, University of Cape Town, 7925, Cape Town, South Africa
| | - Simoné Rossouw
- Department of Human Biology, University of Cape Town, 7925, Cape Town, South Africa
| | - Mubeen Goolam
- Department of Human Biology, University of Cape Town, 7925, Cape Town, South Africa. .,UCT Neuroscience Institute, Cape Town, South Africa.
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12
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Pfeffer PL. Alternative mammalian strategies leading towards gastrulation: losing polar trophoblast (Rauber's layer) or gaining an epiblast cavity. Philos Trans R Soc Lond B Biol Sci 2022; 377:20210254. [PMID: 36252216 PMCID: PMC9574635 DOI: 10.1098/rstb.2021.0254] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Using embryological data from 14 mammalian orders, the hypothesis is presented that in placental mammals, epiblast cavitation and polar trophoblast loss are alternative developmental solutions to shield the central epiblast from extraembryonic signalling. It is argued that such reciprocal signalling between the edge of the epiblast and the adjoining polar trophoblast or edge of the mural trophoblast or with the amniotic ectoderm is necessary for the induction of gastrulation. This article is part of the theme issue 'Extraembryonic tissues: exploring concepts, definitions and functions across the animal kingdom'.
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Affiliation(s)
- Peter L. Pfeffer
- School of Biological Sciences, Victoria University of Wellington, Kelburn Parade, Wellington 6010, New Zealand
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13
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Gropp M, Waldhorn I, Gil Y, Steiner D, Turetsky TT, Smith Y, Sabag O, Falick-Michaeli T, Ram SE, Reubinoff BE. Laminin111-based defined culture promoting self-renewing human pluripotent stem cells with properties of the early post-implantation epiblast. Stem Cell Reports 2022; 17:2643-2660. [PMID: 36368331 PMCID: PMC9768580 DOI: 10.1016/j.stemcr.2022.10.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Revised: 10/12/2022] [Accepted: 10/13/2022] [Indexed: 11/11/2022] Open
Abstract
In the mammalian embryo, a formative pluripotent phase is proposed to exist at the early post-implantation period, during the transition from the pre-implantation naive-to the post-implantation primed-epiblast. By recapitulating a laminin component of the extracellular matrix niche during embryonic formative transition, and defined culture conditions, we generated cultures highly enriched for self-renewing human pluripotent stem cells (hPSCs), exhibiting properties of early post-implantation epiblast cells. These hPSCs display post-implantation-epiblast gene expression profiles. FGF and TGF-β signaling maintain their self-renewal for multiple passages. They have inactive canonical Wnt signaling, do not express primitive streak markers, and are competent to initiate differentiation toward germline and somatic fates. hPSCs exhibiting early post-implantation epiblast properties may shed light on human embryonic PSCs development and may serve for initiating somatic and germ cell specification.
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Affiliation(s)
- Michal Gropp
- The Hadassah Stem Cell Research Center, Goldyne Savad Institute of Gene Therapy, Hadassah-Hebrew University Medical Center, 91120 Jerusalem, Israel
| | - Ithai Waldhorn
- The Hadassah Stem Cell Research Center, Goldyne Savad Institute of Gene Therapy, Hadassah-Hebrew University Medical Center, 91120 Jerusalem, Israel
| | - Yaniv Gil
- The Hadassah Stem Cell Research Center, Goldyne Savad Institute of Gene Therapy, Hadassah-Hebrew University Medical Center, 91120 Jerusalem, Israel
| | - Debora Steiner
- The Hadassah Stem Cell Research Center, Goldyne Savad Institute of Gene Therapy, Hadassah-Hebrew University Medical Center, 91120 Jerusalem, Israel
| | - Tikva Tako Turetsky
- The Hadassah Stem Cell Research Center, Goldyne Savad Institute of Gene Therapy, Hadassah-Hebrew University Medical Center, 91120 Jerusalem, Israel
| | - Yoav Smith
- The Faculty of Medicine, Hebrew University of Jerusalem, Jerusalem, Israel
| | - Ofra Sabag
- Department of Developmental Biology and Cancer Research, Faculty of Medicine, Hebrew University of Jerusalem, Israel
| | - Tal Falick-Michaeli
- Rubin Chair in Medical Science, Department of Developmental Biology & Cancer Research, IMRIC, Faculty of Medicine, Hebrew University of Jerusalem, Jerusalem, Israel
| | - Sharona Even Ram
- The Hadassah Stem Cell Research Center, Goldyne Savad Institute of Gene Therapy, Hadassah-Hebrew University Medical Center, 91120 Jerusalem, Israel
| | - Benjamin E. Reubinoff
- The Hadassah Stem Cell Research Center, Goldyne Savad Institute of Gene Therapy, Hadassah-Hebrew University Medical Center, 91120 Jerusalem, Israel,Department of Obstetrics and Gynecology, Hadassah-Hebrew University Medical Center, 91120 Jerusalem, Israel,Corresponding author
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14
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Carleton AE, Duncan MC, Taniguchi K. Human epiblast lumenogenesis: From a cell aggregate to a lumenal cyst. Semin Cell Dev Biol 2022; 131:117-123. [PMID: 35637065 PMCID: PMC9529837 DOI: 10.1016/j.semcdb.2022.05.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Revised: 05/13/2022] [Accepted: 05/13/2022] [Indexed: 12/14/2022]
Abstract
The formation of a central lumen in the human epiblast is a critical step for development. However, because the lumen forms in the epiblast coincident with implantation, the molecular and cellular events of this early lumenogenesis process cannot be studied in vivo. Recent developments using new model systems have revealed insight into the underpinnings of epiblast formation. To provide an up-to-date comprehensive review of human epiblast lumenogenesis, we highlight recent findings from human and mouse models with an emphasis on new molecular understanding of a newly described apicosome compartment, a novel 'formative' state of pluripotency that coordinates with epiblast polarization, and new evidence about the physical and polarized trafficking mechanisms contributing to lumenogenesis.
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Affiliation(s)
- Amber E. Carleton
- Departments of Cell Biology, Neurobiology and Anatomy, Medical College of Wisconsin, Milwaukee, Wisconsin USA
| | - Mara C. Duncan
- Departments of Cell and Developmental Biology, University of Michigan Medical School, Ann Arbor, Michigan USA,Co-corresponding authors
| | - Kenichiro Taniguchi
- Departments of Cell Biology, Neurobiology and Anatomy, Medical College of Wisconsin, Milwaukee, Wisconsin USA,Department of Pediatrics, Medical College of Wisconsin, Milwaukee, Wisconsin USA,Co-corresponding authors
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15
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Vrij EJ, Scholte op Reimer YS, Fuentes LR, Guerreiro IM, Holzmann V, Aldeguer JF, Sestini G, Koo BK, Kind J, van Blitterswijk CA, Rivron NC. A pendulum of induction between the epiblast and extra-embryonic endoderm supports post-implantation progression. Development 2022; 149:dev192310. [PMID: 35993866 PMCID: PMC9534490 DOI: 10.1242/dev.192310] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Accepted: 06/23/2022] [Indexed: 08/17/2023]
Abstract
Embryogenesis is supported by dynamic loops of cellular interactions. Here, we create a partial mouse embryo model to elucidate the principles of epiblast (Epi) and extra-embryonic endoderm co-development (XEn). We trigger naive mouse embryonic stem cells to form a blastocyst-stage niche of Epi-like cells and XEn-like cells (3D, hydrogel free and serum free). Once established, these two lineages autonomously progress in minimal medium to form an inner pro-amniotic-like cavity surrounded by polarized Epi-like cells covered with visceral endoderm (VE)-like cells. The progression occurs through reciprocal inductions by which the Epi supports the primitive endoderm (PrE) to produce a basal lamina that subsequently regulates Epi polarization and/or cavitation, which, in return, channels the transcriptomic progression to VE. This VE then contributes to Epi bifurcation into anterior- and posterior-like states. Similarly, boosting the formation of PrE-like cells within blastoids supports developmental progression. We argue that self-organization can arise from lineage bifurcation followed by a pendulum of induction that propagates over time.
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Affiliation(s)
- Erik J. Vrij
- MERLN Institute for Technology-inspired Regenerative Medicine, Maastricht University, Universiteitssingel 40, 6229 ER Maastricht, Netherlands
- Institute of Molecular Biotechnology of the Austrian Academy of Sciences, Vienna Biocenter, Dr. Bohr-Gasse 3, 1030 Vienna, Austria
| | - Yvonne S. Scholte op Reimer
- Institute of Molecular Biotechnology of the Austrian Academy of Sciences, Vienna Biocenter, Dr. Bohr-Gasse 3, 1030 Vienna, Austria
| | - Laury Roa Fuentes
- MERLN Institute for Technology-inspired Regenerative Medicine, Maastricht University, Universiteitssingel 40, 6229 ER Maastricht, Netherlands
| | - Isabel Misteli Guerreiro
- Hubrecht Institute, Royal Netherlands Academy of Arts and Sciences (KNAW) and University Medical Center Utrecht, UtrechtUppsalalaan 8, 3584 CT Utrecht, Netherlands
| | - Viktoria Holzmann
- Institute of Molecular Biotechnology of the Austrian Academy of Sciences, Vienna Biocenter, Dr. Bohr-Gasse 3, 1030 Vienna, Austria
| | - Javier Frias Aldeguer
- MERLN Institute for Technology-inspired Regenerative Medicine, Maastricht University, Universiteitssingel 40, 6229 ER Maastricht, Netherlands
- Hubrecht Institute, Royal Netherlands Academy of Arts and Sciences (KNAW) and University Medical Center Utrecht, UtrechtUppsalalaan 8, 3584 CT Utrecht, Netherlands
| | - Giovanni Sestini
- Institute of Molecular Biotechnology of the Austrian Academy of Sciences, Vienna Biocenter, Dr. Bohr-Gasse 3, 1030 Vienna, Austria
| | - Bon-Kyoung Koo
- Institute of Molecular Biotechnology of the Austrian Academy of Sciences, Vienna Biocenter, Dr. Bohr-Gasse 3, 1030 Vienna, Austria
| | - Jop Kind
- Hubrecht Institute, Royal Netherlands Academy of Arts and Sciences (KNAW) and University Medical Center Utrecht, UtrechtUppsalalaan 8, 3584 CT Utrecht, Netherlands
- Department of Molecular Biology, Faculty of Science, Radboud Institute for Molecular Life Sciences, Radboud University Nijmegen, Geert Grooteplein Zuid 10, 6525 GA Nijmegen, Netherlands
| | - Clemens A. van Blitterswijk
- MERLN Institute for Technology-inspired Regenerative Medicine, Maastricht University, Universiteitssingel 40, 6229 ER Maastricht, Netherlands
| | - Nicolas C. Rivron
- Institute of Molecular Biotechnology of the Austrian Academy of Sciences, Vienna Biocenter, Dr. Bohr-Gasse 3, 1030 Vienna, Austria
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16
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Hua Y, Yoshimochi K, Li J, Takekita K, Shimotsuma M, Li L, Qu X, Zhang J, Sawa Y, Liu L, Miyagawa S. Development and evaluation of a novel xeno-free culture medium for human-induced pluripotent stem cells. Stem Cell Res Ther 2022; 13:223. [PMID: 35658933 PMCID: PMC9166585 DOI: 10.1186/s13287-022-02879-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2022] [Accepted: 05/03/2022] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Human-induced pluripotent stem cells (hiPSCs) are considered an ideal resource for regenerative medicine because of their ease of access and infinite expansion ability. To satisfy the sizable requirement for clinical applications of hiPSCs, large-scale, expansion-oriented, xeno-free, and cost-effective media are critical. Although several xeno-free media for hiPSCs have been generated over the past decades, few of them are suitable for scalable expansion of cultured hiPSCs because of their modest potential for proliferation and high cost. METHODS In this study, we developed a xeno-free ON2/AscleStem PSC medium (ON2) and cultured 253G1 hiPSCs on different matrices, including iMatrix-511 and gelatin nanofiber (GNF) in ON2. Over 20 passages, we evaluated cell proliferation by doubling times; pluripotency by flow cytometry, immunofluorescence staining and qRT-PCR; and differentiation ability by three germ layer differentiation in vitro and teratoma formation in severe combined immunodeficiency mice, followed by histological analysis. In addition, we compared the maintenance effect of ON2 on hiPSCs with StemFit® AK02 (AK02N) and Essential 8™ (E8). Besides 253G1 hiPSCs, we cultivated different hiPSC lines, including Ff-l01 hiPSCs, ATCC® ACS-1020™ hiPSCs, and Down's syndrome patient-specific ATCC® ACS-1003™ hiPSCs in ON2. RESULTS We found that 253G1 hiPSCs in ON2 demonstrated normal morphology and karyotype and high self-renewal and differentiation abilities on the tested matrices for over 20 passages. Moreover, 253G1 hiPSCs kept on GNF showed higher growth and stemness, as verified by the shorter doubling time and higher expression levels of pluripotent markers. Compared to AK02N and E8 media, 253G1 hiPSCs grown in ON2 showed higher pluripotency, as demonstrated by the increased expression level of pluripotent factors. In addition, all hiPSC lines cultivated in ON2 were able to grow for at least 10 passages with compact clonal morphology and were positive for all detected pluripotent markers. CONCLUSIONS Our xeno-free ON2 was compatible with various matrices and ideal for long-term expansion and maintenance of not only healthy-derived hiPSCs but also patient-specific hiPSCs. This highly efficient medium enabled the rapid expansion of hiPSCs in a reliable and cost-effective manner and could act as a promising tool for disease modeling and large-scale production for regenerative medicine in the future.
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Affiliation(s)
- Ying Hua
- Department of Cardiovascular Surgery, Osaka University Graduate School of Medicine, Osaka, 565-0871, Japan
| | - Kenji Yoshimochi
- NACALAI TESQUE, INC. Research and Development Department, Kyoto, 604-0855, Japan
| | - Junjun Li
- Department of Cardiovascular Surgery, Osaka University Graduate School of Medicine, Osaka, 565-0871, Japan.,Division of Cardiovascular Surgery, Department of Design for Tissue Regeneration, Graduate School of Medicine, Osaka, 565-0871, Japan
| | - Kazuhiro Takekita
- Department of Cardiovascular Surgery, Osaka University Graduate School of Medicine, Osaka, 565-0871, Japan
| | - Motoshi Shimotsuma
- NACALAI TESQUE, INC. Research and Development Department, Kyoto, 604-0855, Japan
| | - Lingjun Li
- Department of Cardiovascular Surgery, Osaka University Graduate School of Medicine, Osaka, 565-0871, Japan
| | - Xiang Qu
- Department of Cardiovascular Surgery, Osaka University Graduate School of Medicine, Osaka, 565-0871, Japan
| | - Jingbo Zhang
- Department of Cardiovascular Surgery, Osaka University Graduate School of Medicine, Osaka, 565-0871, Japan
| | | | - Li Liu
- Department of Cardiovascular Surgery, Osaka University Graduate School of Medicine, Osaka, 565-0871, Japan. .,Division of Cardiovascular Surgery, Department of Design for Tissue Regeneration, Graduate School of Medicine, Osaka, 565-0871, Japan.
| | - Shigeru Miyagawa
- Department of Cardiovascular Surgery, Osaka University Graduate School of Medicine, Osaka, 565-0871, Japan.
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17
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Hayashida K, Aquino RS, Park PW. Coreceptor Functions of Cell Surface Heparan Sulfate Proteoglycans. Am J Physiol Cell Physiol 2022; 322:C896-C912. [PMID: 35319900 PMCID: PMC9109798 DOI: 10.1152/ajpcell.00050.2022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Receptor-ligand interactions play an important role in many biological processes by triggering specific cellular responses. These interactions are frequently regulated by coreceptors that facilitate, alter, or inhibit signaling. Coreceptors work in parallel with other specific and accessory molecules to coordinate receptor-ligand interactions. Cell surface heparan sulfate proteoglycans (HSPGs) function as unique coreceptors because they can bind to many ligands and receptors through their HS and core protein motifs. Cell surface HSPGs are typically expressed in abundance of the signaling receptors and, thus, are capable of mediating the initial binding of ligands to the cell surface. HSPG coreceptors do not possess kinase domains or intrinsic enzyme activities and, for the most part, binding to cell surface HSPGs does not directly stimulate intracellular signaling. Because of these features, cell surface HSPGs primarily function as coreceptors for many receptor-ligand interactions. Given that cell surface HSPGs are widely conserved, they likely serve fundamental functions to preserve basic physiological processes. Indeed, cell surface HSPGs can support specific cellular interactions with growth factors, morphogens, chemokines, extracellular matrix (ECM) components, and microbial pathogens and their secreted virulence factors. Through these interactions, HSPG coreceptors regulate cell adhesion, proliferation, migration and differentiation, and impact the onset, progression, and outcome of pathophysiological processes, such as development, tissue repair, inflammation, infection, and tumorigenesis. This review seeks to provide an overview of the various mechanisms of how cell surface HSPGs function as coreceptors.
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Affiliation(s)
- Kazutaka Hayashida
- Department of Medicine, Boston Children's Hospital, Boston, MA, United States
| | - Rafael S Aquino
- Department of Medicine, Boston Children's Hospital, Boston, MA, United States
| | - Pyong Woo Park
- Department of Medicine, Boston Children's Hospital, Boston, MA, United States.,Department of Pediatrics, Harvard Medical School, Boston, MA, United States
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18
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Wilson SE. Defective perlecan-associated basement membrane regeneration and altered modulation of transforming growth factor beta in corneal fibrosis. Cell Mol Life Sci 2022; 79:144. [PMID: 35188596 PMCID: PMC8972081 DOI: 10.1007/s00018-022-04184-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Revised: 01/14/2022] [Accepted: 02/01/2022] [Indexed: 02/06/2023]
Abstract
In the cornea, the epithelial basement membrane (EBM) and corneal endothelial Descemet's basement membrane (DBM) critically regulate the localization, availability and, therefore, the functions of transforming growth factor (TGF)β1, TGFβ2, and platelet-derived growth factors (PDGF) that modulate myofibroblast development. Defective regeneration of the EBM, and notably diminished perlecan incorporation, occurs via several mechanisms and results in excessive and prolonged penetration of pro-fibrotic growth factors into the stroma. These growth factors drive mature myofibroblast development from both corneal fibroblasts and bone marrow-derived fibrocytes, and then the persistence of these myofibroblasts and the disordered collagens and other matrix materials they produce to generate stromal scarring fibrosis. Corneal stromal fibrosis often resolves completely if the inciting factor is removed and the BM regenerates. Similar defects in BM regeneration are likely associated with the development of fibrosis in other organs where perlecan has a critical role in the modulation of signaling by TGFβ1 and TGFβ2. Other BM components, such as collagen type IV and collagen type XIII, are also critical regulators of TGF beta (and other growth factors) in the cornea and other organs. After injury, BM components are dynamically secreted and assembled through the cooperation of neighboring cells-for example, the epithelial cells and keratocytes for the corneal EBM and corneal endothelial cells and keratocytes for the corneal DBM. One of the most critical functions of these reassembled BMs in all organs is to modulate the pro-fibrotic effects of TGFβs, PDGFs and other growth factors between tissues that comprise the organ.
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Affiliation(s)
- Steven E Wilson
- Cole Eye Institute, I-32, Cleveland Clinic, 9500 Euclid Ave, Cleveland, OH, USA.
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19
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Morais MRPT, Tian P, Lawless C, Murtuza-Baker S, Hopkinson L, Woods S, Mironov A, Long DA, Gale DP, Zorn TMT, Kimber SJ, Zent R, Lennon R. Kidney organoids recapitulate human basement membrane assembly in health and disease. eLife 2022; 11:73486. [PMID: 35076391 PMCID: PMC8849328 DOI: 10.7554/elife.73486] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Accepted: 01/24/2022] [Indexed: 12/04/2022] Open
Abstract
Basement membranes (BMs) are complex macromolecular networks underlying all continuous layers of cells. Essential components include collagen IV and laminins, which are affected by human genetic variants leading to a range of debilitating conditions including kidney, muscle, and cerebrovascular phenotypes. We investigated the dynamics of BM assembly in human pluripotent stem cell-derived kidney organoids. We resolved their global BM composition and discovered a conserved temporal sequence in BM assembly that paralleled mammalian fetal kidneys. We identified the emergence of key BM isoforms, which were altered by a pathogenic variant in COL4A5. Integrating organoid, fetal, and adult kidney proteomes, we found dynamic regulation of BM composition through development to adulthood, and with single-cell transcriptomic analysis we mapped the cellular origins of BM components. Overall, we define the complex and dynamic nature of kidney organoid BM assembly and provide a platform for understanding its wider relevance in human development and disease.
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Affiliation(s)
- Mychel RPT Morais
- Wellcome Trust Centre for Cell-Matrix Research, University of ManchesterManchesterUnited Kingdom
| | - Pinyuan Tian
- Wellcome Trust Centre for Cell-Matrix Research, University of ManchesterManchesterUnited Kingdom
| | - Craig Lawless
- Wellcome Trust Centre for Cell-Matrix Research, University of ManchesterManchesterUnited Kingdom
| | - Syed Murtuza-Baker
- Division of Informatics, Imaging and Data Sciences, University of ManchesterManchesterUnited Kingdom
| | - Louise Hopkinson
- Wellcome Trust Centre for Cell-Matrix Research, University of ManchesterManchesterUnited Kingdom
| | - Steven Woods
- Division of Cell Matrix Biology and Regenerative Medicine, University of ManchesterManchesterUnited Kingdom
| | - Aleksandr Mironov
- Electron Microscopy Core Facility, University of ManchesterManchesterUnited Kingdom
| | - David A Long
- Developmental Biology and Cancer Programme, University College LondonLondonUnited Kingdom
| | - Daniel P Gale
- Department of Renal Medicine, University College LondonLondonUnited Kingdom
| | - Telma MT Zorn
- Department of Cell and Developmental Biology, University of São PauloSão PauloBrazil
| | - Susan J Kimber
- Division of Cell Matrix Biology and Regenerative Medicine, University of ManchesterManchesterUnited Kingdom
| | - Roy Zent
- Department of Medicine, Vanderbilt University Medical CenterNashvilleUnited States
| | - Rachel Lennon
- Wellcome Trust Centre for Cell-Matrix Research, University of ManchesterManchesterUnited Kingdom,Department of Paediatric Nephrology, Royal Manchester Children’s Hospital, Manchester University Hospitals NHS Foundation TrustManchesterUnited Kingdom
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20
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Indana D, Agarwal P, Bhutani N, Chaudhuri O. Viscoelasticity and Adhesion Signaling in Biomaterials Control Human Pluripotent Stem Cell Morphogenesis in 3D Culture. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2101966. [PMID: 34499389 DOI: 10.1002/adma.202101966] [Citation(s) in RCA: 51] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Revised: 06/27/2021] [Indexed: 06/13/2023]
Abstract
Organoids are lumen-containing multicellular structures that recapitulate key features of the organs, and are increasingly used in models of disease, drug testing, and regenerative medicine. Recent work has used 3D culture models to form organoids from human induced pluripotent stem cells (hiPSCs) in reconstituted basement membrane (rBM) matrices. However, rBM matrices offer little control over the microenvironment. More generally, the role of matrix viscoelasticity in directing lumen formation remains unknown. Here, viscoelastic alginate hydrogels with independently tunable stress relaxation (viscoelasticity), stiffness, and arginine-glycine-aspartate (RGD) ligand density are used to study hiPSC morphogenesis in 3D culture. A phase diagram that shows how these properties control hiPSC morphogenesis is reported. Higher RGD density and fast stress relaxation promote hiPSC viability, proliferation, apicobasal polarization, and lumen formation, while slow stress relaxation at low RGD densities triggers hiPSC apoptosis. Notably, hiPSCs maintain pluripotency in alginate hydrogels for much longer times than is reported in rBM matrices. Lumen formation is regulated by actomyosin contractility and is accompanied by translocation of Yes-associated protein (YAP) from the nucleus to the cytoplasm. The results reveal matrix viscoelasticity as a potent factor regulating stem cell morphogenesis and provide new insights into how engineered biomaterials may be leveraged to build organoids.
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Affiliation(s)
- Dhiraj Indana
- Department of Mechanical Engineering, Stanford University, Stanford, CA, 94305, USA
| | - Pranay Agarwal
- Department of Orthopaedic Surgery, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Nidhi Bhutani
- Department of Orthopaedic Surgery, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Ovijit Chaudhuri
- Department of Mechanical Engineering, Stanford University, Stanford, CA, 94305, USA
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21
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Ng JCK, Peng JHC, Chen AYS, Tian T, Zhou JS, Smith TJ. Plasticity of the lettuce infectious yellows virus minor coat protein (CPm) in mediating the foregut retention and transmission of a chimeric CPm mutant by whitefly vectors. J Gen Virol 2021; 102:001652. [PMID: 34494949 PMCID: PMC8567426 DOI: 10.1099/jgv.0.001652] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Accepted: 07/16/2021] [Indexed: 01/04/2023] Open
Abstract
Transmission of the crinivirus, lettuce infectious yellows virus (LIYV), is determined by a minor coat protein (CPm)-mediated virion retention mechanism located in the foregut of its whitefly vector. To better understand the functions of LIYV CPm, chimeric CPm mutants engineered with different lengths of the LIYV CPm amino acid sequence and that of the crinivirus, lettuce chlorosis virus (LCV), were constructed based on bioinformatics and sequence alignment data. The 485 amino acid-long chimeric CPm of LIYV mutant, CPmP-1, contains 60 % (from position 3 to 294) of LCV CPm amino acids. The chimeric CPm of mutants CPmP-2, CPmP-3 and CPmP-4 contains 46 (position 3 to 208), 51 (position 3 to 238) and 41 % (position 261 to 442) of LCV CPm amino acids, respectively. All four mutants moved systemically, expressed the chimeric CPm and formed virus particles. However, following acquisition feeding of the virus preparations, only CPmP-1 was retained in the foreguts of a significant number of vectors and transmitted. In immuno-gold labelling transmission electron microscopy (IGL-TEM) analysis, CPmP-1 particles were distinctly labelled by antibodies directed against the LCV but not LIYV CPm. In contrast, CPmP-4 particles were not labelled by antibodies directed against the LCV or LIYV CPm, while CPmP-2 and -3 particles were weakly labelled by anti-LIYV CPm but not anti-LCV CPm antibodies. The unique antibody recognition and binding pattern of CPmP-1 was also displayed in the foreguts of whitefly vectors that fed on CPmP-1 virions. These results are consistent with the hypothesis that the chimeric CPm of CPmP-1 is incorporated into functional virions, with the LCV CPm region being potentially exposed on the surface and accessible to anti-LCV CPm antibodies.
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Affiliation(s)
- James C. K. Ng
- Department of Microbiology and Plant Pathology, University of California, Riverside, CA 92521, USA
- Center for Infectious Disease and Vector Research, University of California, Riverside, CA 92521, USA
| | - James H. C. Peng
- Department of Microbiology and Plant Pathology, University of California, Riverside, CA 92521, USA
| | - Angel Y. S. Chen
- Department of Microbiology and Plant Pathology, University of California, Riverside, CA 92521, USA
| | - Tongyan Tian
- California Department of Food and Agriculture, Sacramento, CA 95832, USA
| | - Jaclyn S. Zhou
- Department of Microbiology and Plant Pathology, University of California, Riverside, CA 92521, USA
| | - Thomas J. Smith
- Department of Biochemistry and Molecular Biology, University of Texas Medical Branch at Galveston, TX, 77555, USA
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22
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Orietti LC, Rosa VS, Antonica F, Kyprianou C, Mansfield W, Marques-Souza H, Shahbazi MN, Zernicka-Goetz M. Embryo size regulates the timing and mechanism of pluripotent tissue morphogenesis. Stem Cell Reports 2021; 16:1182-1196. [PMID: 33035465 PMCID: PMC8185375 DOI: 10.1016/j.stemcr.2020.09.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Revised: 09/01/2020] [Accepted: 09/08/2020] [Indexed: 12/24/2022] Open
Abstract
Mammalian embryogenesis is a paradigm of regulative development as mouse embryos show plasticity in the regulation of cell fate, cell number, and tissue morphogenesis. However, the mechanisms behind embryo plasticity remain largely unknown. Here, we determine how mouse embryos respond to an increase in cell numbers to regulate the timing and mechanism of embryonic morphogenesis, leading to the formation of the pro-amniotic cavity. Using embryos and embryonic stem cell aggregates of different size, we show that while pro-amniotic cavity formation in normal-sized embryos is achieved through basement membrane-induced polarization and exocytosis, cavity formation of increased-size embryos is delayed and achieved through apoptosis of cells that lack contact with the basement membrane. Importantly, blocking apoptosis, both genetically and pharmacologically, alters pro-amniotic cavity formation but does not affect size regulation in enlarged embryos. We conclude that the regulation of embryonic size and morphogenesis, albeit concomitant, have distinct molecular underpinnings.
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Affiliation(s)
- Lorenzo C Orietti
- Mammalian Embryo and Stem Cell Group, University of Cambridge, Department of Physiology, Development and Neuroscience, Downing Street, Cambridge CB2 3DY, UK; Centre for Trophoblast Research, University of Cambridge, Cambridge, UK
| | - Viviane Souza Rosa
- Mammalian Embryo and Stem Cell Group, University of Cambridge, Department of Physiology, Development and Neuroscience, Downing Street, Cambridge CB2 3DY, UK; Department of Biochemistry and Tissue Biology, State University of Campinas, CP 6109, 13083-970 Campinas, SP, Brazil
| | - Francesco Antonica
- Mammalian Embryo and Stem Cell Group, University of Cambridge, Department of Physiology, Development and Neuroscience, Downing Street, Cambridge CB2 3DY, UK
| | - Christos Kyprianou
- Mammalian Embryo and Stem Cell Group, University of Cambridge, Department of Physiology, Development and Neuroscience, Downing Street, Cambridge CB2 3DY, UK
| | - William Mansfield
- Wellcome - MRC Cambridge Stem Cell Institute, Jeffrey Cheah Biomedical Centre Cambridge Biomedical Campus, Puddicombe Way, Cambridge CB2 0AW, UK
| | - Henrique Marques-Souza
- Department of Biochemistry and Tissue Biology, State University of Campinas, CP 6109, 13083-970 Campinas, SP, Brazil
| | - Marta N Shahbazi
- Mammalian Embryo and Stem Cell Group, University of Cambridge, Department of Physiology, Development and Neuroscience, Downing Street, Cambridge CB2 3DY, UK.
| | - Magdalena Zernicka-Goetz
- Mammalian Embryo and Stem Cell Group, University of Cambridge, Department of Physiology, Development and Neuroscience, Downing Street, Cambridge CB2 3DY, UK; Centre for Trophoblast Research, University of Cambridge, Cambridge, UK; California Institute of Technology (Caltech), Division of Biology and Biological Engineering, Pasadena, CA 91125, USA.
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23
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Kimball EE, Sayce L, Xu XC, Kruszka CM, Rousseau B. Protein Substrate Alters Cell Physiology in Primary Culture of Vocal Fold Epithelial Cells. Cells Tissues Organs 2021; 210:10-23. [PMID: 33910192 PMCID: PMC8222167 DOI: 10.1159/000514200] [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: 04/13/2020] [Accepted: 12/18/2020] [Indexed: 11/19/2022] Open
Abstract
The basement membrane interacts directly with the vocal fold epithelium. Signaling between the basement membrane and the epithelium modulates gene regulation, differentiation, and proliferation. The purpose of this study was to identify an appropriate simple single-protein substrate for growth of rabbit vocal fold epithelial cells. Vocal folds from 3 New Zealand white rabbits (Oryctolagus cuniculus) were treated to isolate epithelial cells, and cells were seeded onto cell culture inserts coated with collagen I, collagen IV, laminin, or fibronectin. Transepithelial electrical resistance (TEER) was measured, and phase contrast microscopy, PanCK, CK14, and E-cadherin immunofluorescence were utilized to assess for epithelial cell-type characteristics. Further investigation via immunofluorescence labeling was conducted to assess proliferation (Ki67) and differentiation (Vimentin). There was a significant main effect of substrate on TEER, with collagen IV eliciting the highest, and laminin the lowest resistance. Assessment of relative TEER across cell lines identified a larger range of TEER in collagen I and laminin. Phase contrast imaging identified altered morphology in the laminin condition, but cell layer depth did not appear to be related to TEER, differentiation, or morphology. Ki67 staining additionally showed no significant difference in proliferation. All conditions had confluent epithelial cells and dispersed mesenchymal cells, with increased mesenchymal cell numbers over time; however, a higher proportion of mesenchymal cells was observed in the laminin condition. The results suggest collagen IV is a preferable basement membrane substrate for in vitro vocal fold epithelial primary cell culture, providing consistent TEER and characteristic cell morphology, and that laminin is an unsuitable substrate for vocal fold epithelial cells and may promote mesenchymal cell proliferation.
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Affiliation(s)
- Emily E. Kimball
- Department of Hearing and Speech Sciences, Vanderbilt University, Nashville, TN USA
- Department of Otolaryngology, Vanderbilt University Medical Center, Nashville, TN USA
| | - Lea Sayce
- Department of Communication Sciences and Disorders, University of Pittsburgh, Pittsburgh, PA USA
- Department of Otolaryngology, Vanderbilt University Medical Center, Nashville, TN USA
| | - Xiaochuan C. Xu
- Department of Communication Sciences and Disorders, University of Pittsburgh, Pittsburgh, PA USA
| | - Chase M. Kruszka
- Department of Biology, University of Pittsburgh, Pittsburgh, PA, USA
| | - Bernard Rousseau
- Department of Communication Sciences and Disorders, University of Pittsburgh, Pittsburgh, PA USA
- Department of Otolaryngology, Vanderbilt University Medical Center, Nashville, TN USA
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24
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Qi Y, Liu J, Chao J, Greer PA, Li S. PTEN dephosphorylates Abi1 to promote epithelial morphogenesis. J Cell Biol 2021; 219:151941. [PMID: 32673396 PMCID: PMC7480098 DOI: 10.1083/jcb.201910041] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Revised: 04/08/2020] [Accepted: 06/08/2020] [Indexed: 12/20/2022] Open
Abstract
The tumor suppressor PTEN is essential for early development. Its lipid phosphatase activity converts PIP3 to PIP2 and antagonizes the PI3K–Akt pathway. In this study, we demonstrate that PTEN’s protein phosphatase activity is required for epiblast epithelial differentiation and polarization. This is accomplished by reconstitution of PTEN-null embryoid bodies with PTEN mutants that lack only PTEN’s lipid phosphatase activity or both PTEN’s lipid and protein phosphatase activities. Phosphotyrosine antibody immunoprecipitation and mass spectrometry were used to identify Abi1, a core component of the WASP-family verprolin homologous protein (WAVE) regulatory complex (WRC), as a new PTEN substrate. We demonstrate that PTEN dephosphorylation of Abi1 at Y213 and S216 results in Abi1 degradation through the calpain pathway. This leads to down-regulation of the WRC and reorganization of the actin cytoskeleton. The latter is critical to the transformation of nonpolar pluripotent stem cells into the polarized epiblast epithelium. Our findings establish a link between PTEN and WAVE-Arp2/3–regulated actin cytoskeletal dynamics in epithelial morphogenesis.
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Affiliation(s)
- Yanmei Qi
- Department of Surgery, Rutgers University Robert Wood Johnson Medical School, New Brunswick, NJ
| | - Jie Liu
- Department of Surgery, Rutgers University Robert Wood Johnson Medical School, New Brunswick, NJ
| | - Joshua Chao
- Department of Surgery, Rutgers University Robert Wood Johnson Medical School, New Brunswick, NJ
| | - Peter A Greer
- Department of Pathology and Molecular Medicine, Queen's University, Kingston, Ontario, Canada
| | - Shaohua Li
- Department of Surgery, Rutgers University Robert Wood Johnson Medical School, New Brunswick, NJ
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25
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Zhang B, Yu Q, Liu Y. Polarization of Stem Cells Directed by Magnetic Field-Manipulated Supramolecular Polymeric Nanofibers. ACS APPLIED MATERIALS & INTERFACES 2021; 13:9580-9588. [PMID: 33599493 DOI: 10.1021/acsami.0c19428] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Precise assembly of the cytoskeleton (e.g., actin, tubulin, and intermediate filaments) is of great importance for stem cell polarization and tissue regeneration. Recently, artificial manipulation of cytoskeleton assembly for remodeling stem cell polarization and ultimate cell fates attracts more and more interest of both chemists and biologists. Herein, we report the magnetic field-directed formation of biocompatible supramolecular polymeric nanofibers composed of two subunits: a β-cyclodextrin-bearing hyaluronic acid host polymer (HACD) and magnetic nanoparticles modified with actin-binding peptide and adamantane (MS-ABPAda). Transmission electron microscopy indicated that when HACD and MS-ABPAda were exposed to a magnetic field, they self-assembled into long nanofibers along the direction of the magnetic field, and the rate of nanofiber formation was linearly correlated with the strength of the magnetic field. Interestingly, when incubated with dental pulp stem cells, the nanofibers specifically drove tip extension and polarization of the cells, a phenomenon that can be attributed to targeting of actin-binding peptide to the actin cytoskeleton and subsequent polarization of the nanofibers. The successful application of these magnetic field-responsive supramolecular polymers on accurately driving polarization of mammalian cells is expected to be of great value for artificially manipulating cell fate and developing intelligent responsive materials in regenerative medicine.
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Affiliation(s)
- Bing Zhang
- College of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
| | - Qilin Yu
- Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, College of Life Sciences, Nankai University, Tianjin 300071, China
| | - Yu Liu
- College of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
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26
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Okada T, Suzuki H, Travis ZD, Zhang JH. The Stroke-Induced Blood-Brain Barrier Disruption: Current Progress of Inspection Technique, Mechanism, and Therapeutic Target. Curr Neuropharmacol 2020; 18:1187-1212. [PMID: 32484111 PMCID: PMC7770643 DOI: 10.2174/1570159x18666200528143301] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 04/23/2020] [Accepted: 05/23/2020] [Indexed: 02/07/2023] Open
Abstract
Stroke is one of the leading causes of mortality and morbidity worldwide. The blood-brain barrier (BBB) is a characteristic structure of microvessel within the brain. Under normal physiological conditions, the BBB plays a role in the prevention of harmful substances entering into the brain parenchyma within the central nervous system. However, stroke stimuli induce the breakdown of BBB leading to the influx of cytotoxic substances, vasogenic brain edema, and hemorrhagic transformation. Therefore, BBB disruption is a major complication, which needs to be addressed in order to improve clinical outcomes in stroke. In this review, we first discuss the structure and function of the BBB. Next, we discuss the progress of the techniques utilized to study BBB breakdown in in-vitro and in-vivo studies, along with biomarkers and imaging techniques in clinical settings. Lastly, we highlight the mechanisms of stroke-induced neuroinflammation and apoptotic process of endothelial cells causing BBB breakdown, and the potential therapeutic targets to protect BBB integrity after stroke. Secondary products arising from stroke-induced tissue damage provide transformation of myeloid cells such as microglia and macrophages to pro-inflammatory phenotype followed by further BBB disruption via neuroinflammation and apoptosis of endothelial cells. In contrast, these myeloid cells are also polarized to anti-inflammatory phenotype, repairing compromised BBB. Therefore, therapeutic strategies to induce anti-inflammatory phenotypes of the myeloid cells may protect BBB in order to improve clinical outcomes of stroke patients.
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Affiliation(s)
- Takeshi Okada
- Department of Physiology and Pharmacology, Loma Linda University, Loma Linda, CA, USA, Risley Hall, Room 219,
11041 Campus St, Loma Linda, CA 92354, USA,Department of Neurosurgery, Mie University Graduate School of Medicine, Mie, Japan, 2-174 Edobashi, Tsu, Mie 514-8507, Japan
| | - Hidenori Suzuki
- Department of Neurosurgery, Mie University Graduate School of Medicine, Mie, Japan, 2-174 Edobashi, Tsu, Mie 514-8507, Japan
| | - Zachary D Travis
- Department of Physiology and Pharmacology, Loma Linda University, Loma Linda, CA, USA, Risley Hall, Room 219,
11041 Campus St, Loma Linda, CA 92354, USA,Department of Earth and Biological Sciences, Loma Linda University, Loma Linda, CA, USA , Risley Hall, Room 219, 11041 Campus St, Loma Linda, CA 92354, USA
| | - John H Zhang
- Department of Physiology and Pharmacology, Loma Linda University, Loma Linda, CA, USA, Risley Hall, Room 219,
11041 Campus St, Loma Linda, CA 92354, USA,Department of Anesthesiology, Loma Linda University, Loma Linda, CA, USA, Risley Hall, Room 219, 11041 Campus St, Loma Linda, CA 92354, USA,Department of Neurosurgery, Loma Linda University, Loma Linda, CA, USA, Risley Hall, Room 219, 11041 Campus St, Loma Linda, CA 92354, USA
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27
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The development of laminin-alginate microspheres encapsulated with Ginsenoside Rg1 and ADSCs for breast reconstruction after lumpectomy. Bioact Mater 2020; 6:1699-1710. [PMID: 33313449 PMCID: PMC7710511 DOI: 10.1016/j.bioactmat.2020.11.029] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Revised: 11/02/2020] [Accepted: 11/27/2020] [Indexed: 02/06/2023] Open
Abstract
Many technologies have been developed for breast reconstruction after lumpectomy. Although the technologies achieved promising success in clinical, there are still many shortages hanging over and trouble the researchers. Tissue engineering technology was introduced to plastic surgery that gave a light to lumpectomy patients in breast reconstruction. The unexpected absorption rate, resulting from limited vascularization and low cell survival rate, is a major factor that leads to unsatisfactory results for the previous studies in our lab. In the study, the laminin-modified alginate synthesized by a new method of low concertation of sodium periodate would be mixed with ADSCs and Rg1 in the medium; and then sprayed into a calcium chloride (CaCl2) solution to prepare into microsphere (abbreviated as ADSC–G-LAMS) by bio-electrospray with a power syringe for the mass production and smaller bead size. The developed ADSC–G-LAMS microspheres had the diameter of 232 ± 42 μm. Sustained-release of the Rg1 retained its biological activity. WST-1, live/dead staining, and chromosome aberration assay were evaluated to confirm the safety of the microspheres. In in vivo study, ADSC–G-LAMS microspheres combined with autologous adipocytes were transplanted into the dorsum of rats by subcutaneous injection. The efficacy was investigated by H&E and immunofluorescence staining. The results showed that the bioactive ADSC–G-LAMS microspheres could integrate well into the host adipose tissue with an adequate rate of angiogenesis by constantly releasing Rg1 to enhance the ADSC or adipocyte survival rate to join tissue growth and repair with adipogenesis for breast reconstruction after lumpectomy. Laminin-modified alginate was successfully synthesized to mimic early embryonic environment. Adipose-derived stem cells (ADSCs) and ginsenoside Rg1 were encapsulated into laminin-alginate microspheres (ADSC–G-LAMS) by bio-electrospray method. ADSC–G-LAMS microspheres integrated into the host adipose tissue with an adequate rate of angiogenesis by constantly releasing Rg1. The developed bioactive ADSC–G-LAMS microspheres can be potential scaffolds for stem cells and angiogenic factor carriers for tissue engineering.
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28
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Roig-Rosello E, Rousselle P. The Human Epidermal Basement Membrane: A Shaped and Cell Instructive Platform That Aging Slowly Alters. Biomolecules 2020; 10:E1607. [PMID: 33260936 PMCID: PMC7760980 DOI: 10.3390/biom10121607] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Revised: 11/20/2020] [Accepted: 11/23/2020] [Indexed: 12/11/2022] Open
Abstract
One of the most important functions of skin is to act as a protective barrier. To fulfill this role, the structural integrity of the skin depends on the dermal-epidermal junction-a complex network of extracellular matrix macromolecules that connect the outer epidermal layer to the underlying dermis. This junction provides both a structural support to keratinocytes and a specific niche that mediates signals influencing their behavior. It displays a distinctive microarchitecture characterized by an undulating pattern, strengthening dermal-epidermal connectivity and crosstalk. The optimal stiffness arising from the overall molecular organization, together with characteristic anchoring complexes, keeps the dermis and epidermis layers extremely well connected and capable of proper epidermal renewal and regeneration. Due to intrinsic and extrinsic factors, a large number of structural and biological changes accompany skin aging. These changes progressively weaken the dermal-epidermal junction substructure and affect its functions, contributing to the gradual decline in overall skin physiology. Most changes involve reduced turnover or altered enzymatic or non-enzymatic post-translational modifications, compromising the mechanical properties of matrix components and cells. This review combines recent and older data on organization of the dermal-epidermal junction, its mechanical properties and role in mechanotransduction, its involvement in regeneration, and its fate during the aging process.
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Affiliation(s)
- Eva Roig-Rosello
- Laboratoire de Biologie Tissulaire et Ingénierie Thérapeutique, UMR 5305, CNRS-Université Lyon 1, SFR BioSciences Gerland-Lyon Sud, 7 Passage du Vercors, 69367 Lyon, France;
- Roger Gallet SAS, 4 rue Euler, 75008 Paris, France
| | - Patricia Rousselle
- Laboratoire de Biologie Tissulaire et Ingénierie Thérapeutique, UMR 5305, CNRS-Université Lyon 1, SFR BioSciences Gerland-Lyon Sud, 7 Passage du Vercors, 69367 Lyon, France;
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29
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Zhu Y, Wang H, Yin F, Guo Y, Li F, Gao D, Qin J. Amnion-on-a-chip: modeling human amniotic development in mid-gestation from pluripotent stem cells. LAB ON A CHIP 2020; 20:3258-3268. [PMID: 32749421 DOI: 10.1039/d0lc00268b] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The amnion serves to create a protective environment for a growing fetus, and the study of amniotic development will greatly facilitate our understanding of normal and abnormal pregnancies. However, this remains a poorly studied field due to the lack of ideal human models. Herein, we present an integrative strategy to generate amnion-like cavity tissue from human pluripotent stem cells (hPSCs) in an amnion-on-a-chip device through combining a bioengineering approach and developmental biology principles. hPSCs could self-organize into an amnion epithelial cavity in a perfusable 3D culture microchip, resembling human amniotic development in mid-gestation. These cavities exhibited the critical features of amnion tissue based on morphological characteristics, marker expression, and transcriptome analysis. RNA-seq revealed that a set of amnion-specific genes were highly expressed in the obtained cavities, suggesting that the amnion epithelium was derived from hPSCs. Moreover, the amnion-specific mid-gestation marker KRT24 was highly expressed at the mRNA and protein levels, verifying the high maturation of amnion tissues after long-term 3D culturing and differentiation for up to 20 days. These new findings demonstrate the potential of this new amnion-on-a-chip model for investigating essential biological events in human amnions in normal and diseased states via integrating microengineering technology and stem cell biology.
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Affiliation(s)
- Yujuan Zhu
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, China. and University of Chinese Academy of Sciences, Beijing, China
| | - Hui Wang
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, China. and University of Chinese Academy of Sciences, Beijing, China
| | - Fangchao Yin
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, China. and University of Chinese Academy of Sciences, Beijing, China
| | - Yaqiong Guo
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, China. and University of Chinese Academy of Sciences, Beijing, China
| | - Fei Li
- Shanghai Institute of Biochemistry and Cell Biology, Shanghai, China.
| | - Dong Gao
- Shanghai Institute of Biochemistry and Cell Biology, Shanghai, China.
| | - Jianhua Qin
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, China. and University of Chinese Academy of Sciences, Beijing, China and Institute for Stem Cell and Regeneration, Chinese Academy of Sciences, Beijing, China and CAS Center for Excellence in Brain Science and Intelligence Technology, Chinese Academy of Sciences, Shanghai, China
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30
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Abstract
The glomerular basement membrane (GBM) is a key component of the glomerular capillary wall and is essential for kidney filtration. The major components of the GBM include laminins, type IV collagen, nidogens and heparan sulfate proteoglycans. In addition, the GBM harbours a number of other structural and regulatory components and provides a reservoir for growth factors. New technologies have improved our ability to study the composition and assembly of basement membranes. We now know that the GBM is a complex macromolecular structure that undergoes key transitions during glomerular development. Defects in GBM components are associated with a range of hereditary human diseases such as Alport syndrome, which is caused by defects in the genes COL4A3, COL4A4 and COL4A5, and Pierson syndrome, which is caused by variants in LAMB2. In addition, the GBM is affected by acquired autoimmune disorders and metabolic diseases such as diabetes mellitus. Current treatments for diseases associated with GBM involvement aim to reduce intraglomerular pressure and to treat the underlying cause where possible. As our understanding about the maintenance and turnover of the GBM improves, therapies to replace GBM components or to stimulate GBM repair could translate into new therapies for patients with GBM-associated disease.
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31
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Wnt/β-catenin Signaling in Tissue Self-Organization. Genes (Basel) 2020; 11:genes11080939. [PMID: 32823838 PMCID: PMC7464740 DOI: 10.3390/genes11080939] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 08/10/2020] [Accepted: 08/11/2020] [Indexed: 12/13/2022] Open
Abstract
Across metazoans, animal body structures and tissues exist in robust patterns that arise seemingly out of stochasticity of a few early cells in the embryo. These patterns ensure proper tissue form and function during early embryogenesis, development, homeostasis, and regeneration. Fundamental questions are how these patterns are generated and maintained during tissue homeostasis and regeneration. Though fascinating scientists for generations, these ideas remain poorly understood. Today, it is apparent that the Wnt/β-catenin pathway plays a central role in tissue patterning. Wnt proteins are small diffusible morphogens which are essential for cell type specification and patterning of tissues. In this review, we highlight several mechanisms described where the spatial properties of Wnt/β-catenin signaling are controlled, allowing them to work in combination with other diffusible molecules to control tissue patterning. We discuss examples of this self-patterning behavior during development and adult tissues' maintenance. The combination of new physiological culture systems, mathematical approaches, and synthetic biology will continue to fuel discoveries about how tissues are patterned. These insights are critical for understanding the intricate interplay of core patterning signals and how they become disrupted in disease.
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Abstract
Gene regulatory networks and tissue morphogenetic events drive the emergence of shape and function: the pillars of embryo development. Although model systems offer a window into the molecular biology of cell fate and tissue shape, mechanistic studies of our own development have so far been technically and ethically challenging. However, recent technical developments provide the tools to describe, manipulate and mimic human embryos in a dish, thus opening a new avenue to exploring human development. Here, I discuss the evidence that supports a role for the crosstalk between cell fate and tissue shape during early human embryogenesis. This is a critical developmental period, when the body plan is laid out and many pregnancies fail. Dissecting the basic mechanisms that coordinate cell fate and tissue shape will generate an integrated understanding of early embryogenesis and new strategies for therapeutic intervention in early pregnancy loss.
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Affiliation(s)
- Marta N Shahbazi
- MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge Biomedical Campus, Cambridge CB2 0QH, UK
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Nickolls AR, Lee MM, Zukosky K, Mallon BS, Bönnemann CG. Human embryoid bodies as a 3D tissue model of the extracellular matrix and α-dystroglycanopathies. Dis Model Mech 2020; 13:dmm042986. [PMID: 32423971 PMCID: PMC7328151 DOI: 10.1242/dmm.042986] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Accepted: 04/30/2020] [Indexed: 12/13/2022] Open
Abstract
The basal lamina is a specialized sheet of dense extracellular matrix (ECM) linked to the plasma membrane of specific cell types in their tissue context, which serves as a structural scaffold for organ genesis and maintenance. Disruption of the basal lamina and its functions is central to many disease processes, including cancer metastasis, kidney disease, eye disease, muscular dystrophies and specific types of brain malformation. The latter three pathologies occur in the α-dystroglycanopathies, which are caused by dysfunction of the ECM receptor α-dystroglycan. However, opportunities to study the basal lamina in various human disease tissues are restricted owing to its limited accessibility. Here, we report the generation of embryoid bodies from human induced pluripotent stem cells that model the basal lamina. Embryoid bodies cultured via this protocol mimic pre-gastrulation embryonic development, consisting of an epithelial core surrounded by a basal lamina and a peripheral layer of ECM-secreting endoderm. In α-dystroglycanopathy patient embryoid bodies, electron and fluorescence microscopy reveal ultrastructural basal lamina defects and reduced ECM accumulation. By starting from patient-derived cells, these results establish a method for the in vitro synthesis of patient-specific basal lamina and recapitulate disease-relevant ECM defects seen in the α-dystroglycanopathies. Finally, we apply this system to evaluate an experimental ribitol supplement therapy on genetically diverse α-dystroglycanopathy patient samples.This article has an associated First Person interview with the first author of the paper.
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Affiliation(s)
- Alec R Nickolls
- National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD 20892, USA
- Department of Neuroscience, Brown University, Providence, RI 02912, USA
| | - Michelle M Lee
- National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD 20892, USA
| | - Kristen Zukosky
- National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD 20892, USA
- Department of Neuroscience, Brown University, Providence, RI 02912, USA
| | - Barbara S Mallon
- National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD 20892, USA
| | - Carsten G Bönnemann
- National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD 20892, USA
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Dou X, Zhao Y, Li M, Chen Q, Yamaguchi Y. Raman imaging diagnosis of the early stage differentiation of mouse embryonic stem cell (mESC). SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 224:117438. [PMID: 31377684 DOI: 10.1016/j.saa.2019.117438] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Revised: 07/23/2019] [Accepted: 07/28/2019] [Indexed: 05/19/2023]
Abstract
Raman microspectroscopy as a non-invasive and label-free technique was applied to diagnose the early stage differentiation of mouse embryonic stem cells. The differentiated and undifferentiated embryonic bodies (EBs) were cultured using handing drop method by the control of Leukemia Inhibitory Factor (LIF). Raman spectra of the periphery cells of differentiated EBs (PrE cells) and those of the interior of undifferentiated EBs (ES cells) were obtained to diagnose the stem cells of different differentiation. It was found from the spectra that the protein content increased as the cells differentiated. Principal component analysis (PCA) was carried out to further analyze the differences between ES cells and PrE cells. The first three principle components contained 98.19% from the total variance. Characteristic bands of ES and PrE cells were chosen to acquire Raman images of two cells according to the results of PCA. In the Raman images, PrE cells had a clear and bright outline in the peripheral areas while ES cells were difficult to identify, this could be a distinct characteristic to discriminate them. The result of the Raman images was consistent with the biological agreement that the differentiated cells were distributed around the periphery.
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Affiliation(s)
- Xiaoming Dou
- Institute of Photonics & Bio-medicine, School of Science, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China; Department of Applied Physics, Graduate School of Engineering, Osaka University, 2-1, Yamadaoka, Suita City, Osaka 565-0871, Japan
| | - Yubin Zhao
- Institute of Photonics & Bio-medicine, School of Science, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Mingda Li
- Institute of Photonics & Bio-medicine, School of Science, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Qinmiao Chen
- Institute of Photonics & Bio-medicine, School of Science, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Yoshinori Yamaguchi
- Institute of Photonics & Bio-medicine, School of Science, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China; Department of Applied Physics, Graduate School of Engineering, Osaka University, 2-1, Yamadaoka, Suita City, Osaka 565-0871, Japan.
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35
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Wu D, Witt RL, Harrington DA, Farach-Carson MC. Dynamic Assembly of Human Salivary Stem/Progenitor Microstructures Requires Coordinated α 1β 1 Integrin-Mediated Motility. Front Cell Dev Biol 2019; 7:224. [PMID: 31750298 PMCID: PMC6843075 DOI: 10.3389/fcell.2019.00224] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2018] [Accepted: 09/20/2019] [Indexed: 12/26/2022] Open
Abstract
A tissue engineering approach can provide replacement salivary gland structures to patients with hyposalivation disorders and xerostomia. Salivary human stem/progenitor cells (hS/PCs) were isolated from healthy regions of parotid glands of head and neck surgery patients, expanded, then encapsulated in biocompatible hyaluronate (HA)-based hydrogels. These bioactive hydrogels provide a surrogate territorial matrix suitable for the dynamic assembly, growth and reorganization of salivary gland components. This study examined the dynamics of salivary microstructure formation, growth, and reorganization using time-lapse imaging over 15 h. Immunofluorescence detection monitored production of individual basement membrane components forming around developing microstructures, and Ki67 assessed proliferation. Dynamic movements in hydrogels were quantified by measuring angular velocity (ω) of rotating salivary microstructures and changes in basement membrane architecture during microstructure growth. Integrin involvement in the dynamic reassembly was assessed using knockdown and inhibitor approaches. Single hS/PCs expanded over 5 days into spherical microstructures typically containing 3–10 cells. In larger macrostructures, proliferation occurred near the peripheral basement membrane that underwent growth-associated cycles of thinning and collapse. De novo secretion of laminin/collagen IV from reorganizing hS/PCs preceded that of perlecan/HSPG2. Microstructures routinely expressed β1 integrin-containing complexes at basement membrane-associated regions and exhibited spontaneous and coordinated rotation during basement membrane maturation. β1 integrin siRNA knockdown at the single-cell state prevented hS/PC microstructure growth. After microstructure formation, β1 integrin knockdown reduced rotation and mean ω by 84%. Blockade of the α1 integrin subunit (CD49a) that associates with β1 reduced mean ω by 66%. Studies presented here show that initial hS/PC structure growth and basement membrane maturation depends on α1β1-integrin mediated signaling. Coordinated cellular motility during neotissue reorganization reminiscent of salivary gland acini was critically dependent both on hS/PC-secretion of laminin,collagen type-IV, and perlecan/HSPG2 and the force-driven interactions of α1β1-integrin activation. We conclude that α1β1-integrin plays a critical role in establishing human salivary gland coordinated structure and function, and that its activation in tissue engineered systems is essential to tissue assembly.
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Affiliation(s)
- Danielle Wu
- Department of Diagnostic and Biomedical Sciences, The University of Texas Health Science Center at Houston, Houston, TX, United States.,Department of BioSciences, Rice University, Houston, TX, United States
| | - Robert L Witt
- Center for Translational Cancer Research, Helen F. Graham Cancer Center & Research Institute, Christiana Care Health Center, Newark, DE, United States.,Department of Otolaryngology-Head and Neck Surgery, Thomas Jefferson University, Philadelphia, PA, United States
| | - Daniel A Harrington
- Department of Diagnostic and Biomedical Sciences, The University of Texas Health Science Center at Houston, Houston, TX, United States.,Department of BioSciences, Rice University, Houston, TX, United States
| | - Mary C Farach-Carson
- Department of Diagnostic and Biomedical Sciences, The University of Texas Health Science Center at Houston, Houston, TX, United States.,Department of BioSciences, Rice University, Houston, TX, United States
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36
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Thuveson M, Gaengel K, Collu GM, Chin ML, Singh J, Mlodzik M. Integrins are required for synchronous ommatidial rotation in the Drosophila eye linking planar cell polarity signalling to the extracellular matrix. Open Biol 2019; 9:190148. [PMID: 31409231 PMCID: PMC6731590 DOI: 10.1098/rsob.190148] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Integrins mediate the anchorage between cells and their environment, the extracellular matrix (ECM), and form transmembrane links between the ECM and the cytoskeleton, a conserved feature throughout development and morphogenesis of epithelial organs. Here, we demonstrate that integrins and components of the ECM are required during the planar cell polarity (PCP) signalling-regulated cell movement of ommatidial rotation in the Drosophila eye. The loss-of-function mutations of integrins or ECM components cause defects in rotation, with mutant clusters rotating asynchronously compared to wild-type clusters. Initially, mutant clusters tend to rotate faster, and at later stages they fail to be synchronous with their neighbours, leading to aberrant rotation angles and resulting in a disorganized ommatidial arrangement in adult eyes. We further demonstrate that integrin localization changes dynamically during the rotation process. Our data suggest that core Frizzled/PCP factors, acting through RhoA and Rho kinase, regulate the function/activity of integrins and that integrins thus contribute to the complex interaction network of PCP signalling, cell adhesion and cytoskeletal elements required for a precise and synchronous 90° rotation movement.
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Affiliation(s)
- Maria Thuveson
- Department of Cell, Developmental and Regenerative Biology and Graduate School of Biomedical Sciences, Icahn School of Medicine at Mount Sinai, Annenberg Building 18-92, One Gustave L. Levy Place, New York, NY 10029, USA
| | - Konstantin Gaengel
- Department of Cell, Developmental and Regenerative Biology and Graduate School of Biomedical Sciences, Icahn School of Medicine at Mount Sinai, Annenberg Building 18-92, One Gustave L. Levy Place, New York, NY 10029, USA.,Department of Immunology, Genetics and Pathology, Uppsala University, Rudbeck Laboratory C11, Dag Hammarskjölds Väg 20, 751 85 Uppsala, Sweden
| | - Giovanna M Collu
- Department of Cell, Developmental and Regenerative Biology and Graduate School of Biomedical Sciences, Icahn School of Medicine at Mount Sinai, Annenberg Building 18-92, One Gustave L. Levy Place, New York, NY 10029, USA
| | - Mei-Ling Chin
- Department of Cell, Developmental and Regenerative Biology and Graduate School of Biomedical Sciences, Icahn School of Medicine at Mount Sinai, Annenberg Building 18-92, One Gustave L. Levy Place, New York, NY 10029, USA
| | - Jaskirat Singh
- Department of Cell, Developmental and Regenerative Biology and Graduate School of Biomedical Sciences, Icahn School of Medicine at Mount Sinai, Annenberg Building 18-92, One Gustave L. Levy Place, New York, NY 10029, USA
| | - Marek Mlodzik
- Department of Cell, Developmental and Regenerative Biology and Graduate School of Biomedical Sciences, Icahn School of Medicine at Mount Sinai, Annenberg Building 18-92, One Gustave L. Levy Place, New York, NY 10029, USA
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37
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Scott LE, Weinberg SH, Lemmon CA. Mechanochemical Signaling of the Extracellular Matrix in Epithelial-Mesenchymal Transition. Front Cell Dev Biol 2019; 7:135. [PMID: 31380370 PMCID: PMC6658819 DOI: 10.3389/fcell.2019.00135] [Citation(s) in RCA: 75] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Accepted: 07/04/2019] [Indexed: 12/20/2022] Open
Abstract
Epithelial-Mesenchymal Transition (EMT) is a critical process in embryonic development in which epithelial cells undergo a transdifferentiation into mesenchymal cells. This process is essential for tissue patterning and organization, and it has also been implicated in a wide array of pathologies. While the intracellular signaling pathways that regulate EMT are well-understood, there is increasing evidence that the mechanical properties and composition of the extracellular matrix (ECM) also play a key role in regulating EMT. In turn, EMT drives changes in the mechanics and composition of the ECM, creating a feedback loop that is tightly regulated in healthy tissues, but is often dysregulated in disease. Here we present a review that summarizes our understanding of how ECM mechanics and composition regulate EMT, and how in turn EMT alters ECM mechanics and composition.
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Affiliation(s)
- Lewis E Scott
- Department of Biomedical Engineering, Virginia Commonwealth University, Richmond, VA, United States
| | - Seth H Weinberg
- Department of Biomedical Engineering, Virginia Commonwealth University, Richmond, VA, United States
| | - Christopher A Lemmon
- Department of Biomedical Engineering, Virginia Commonwealth University, Richmond, VA, United States
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38
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Shahbazi MN, Siggia ED, Zernicka-Goetz M. Self-organization of stem cells into embryos: A window on early mammalian development. Science 2019; 364:948-951. [PMID: 31171690 PMCID: PMC8300856 DOI: 10.1126/science.aax0164] [Citation(s) in RCA: 125] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Embryonic development is orchestrated by robust and complex regulatory mechanisms acting at different scales of organization. In vivo studies are particularly challenging for mammals after implantation, owing to the small size and inaccessibility of the embryo. The generation of stem cell models of the embryo represents a powerful system with which to dissect this complexity. Control of geometry, modulation of the physical environment, and priming with chemical signals reveal the intrinsic capacity of embryonic stem cells to make patterns. Adding the stem cells for the extraembryonic lineages generates three-dimensional models that are more autonomous from the environment and recapitulate many features of the pre- and postimplantation mouse embryo, including gastrulation. Here, we review the principles of self-organization and how they set cells in motion to create an embryo.
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Affiliation(s)
- Marta N Shahbazi
- Mammalian Embryo and Stem Cell Group, Department of Physiology, Development and Neuroscience, University of Cambridge, Downing Street, Cambridge CB2 3DY, UK.
| | - Eric D Siggia
- Center for Studies in Physics and Biology, The Rockefeller University, New York, NY 10065, USA.
| | - Magdalena Zernicka-Goetz
- Mammalian Embryo and Stem Cell Group, Department of Physiology, Development and Neuroscience, University of Cambridge, Downing Street, Cambridge CB2 3DY, UK.
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39
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Carrara N, Weaver M, Piedade WP, Vöcking O, Famulski JK. Temporal characterization of optic fissure basement membrane composition suggests nidogen may be an initial target of remodeling. Dev Biol 2019; 452:43-54. [PMID: 31034836 DOI: 10.1016/j.ydbio.2019.04.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Revised: 04/08/2019] [Accepted: 04/23/2019] [Indexed: 01/26/2023]
Abstract
Fusion of the optic fissure is necessary to complete retinal morphogenesis and ensure proper function of the optic stalk. Failure of this event leads to congenital coloboma, one of the leading causes of pediatric blindness. Mechanistically it is widely accepted that the basement membrane (BM) surrounding the maturing retina needs to be remodeled within the fissure in order to facilitate subsequent epithelial sheet fusion. However, the mechanism driving BM remodeling has yet to be elucidated. As a first step to understanding this critical molecular event we comprehensively characterized the core composition of optic fissure BMs in the zebrafish embryos. Zebrafish optic fissure BMs were found to express laminin a1, a4, b1a, c1 and c3, nidogen 1a, 1b and 2a, collagen IV a1 and a2 as well as perlecan. Furthermore, we observed that laminin, perlecan and collagen IV expression persists in the fissure during fusion, up to 56 hpf, while nidogen expression is downregulated upon initiation of fusion, at 36 hpf. Using immunohistochemistry we also show that nidogen is removed from the BM prior to that of laminin, indicating that remodeling of the BM is an ordered event. Lastly, we characterized retinal morphogenesis in the absence of nidogen function and documented retinal malformation similar to what is observed in laminin mutants. Taken together, we propose a model of BM remodeling where nidogen acts as a linchpin during initiation of optic fissure fusion.
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Affiliation(s)
| | - Megan Weaver
- Department of Biology, University of Kentucky, USA
| | | | | | - J K Famulski
- Department of Biology, University of Kentucky, USA.
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40
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Nirwane A, Yao Y. Laminins and their receptors in the CNS. Biol Rev Camb Philos Soc 2019; 94:283-306. [PMID: 30073746 DOI: 10.1111/brv.12454] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Revised: 07/05/2018] [Accepted: 07/09/2018] [Indexed: 01/24/2023]
Abstract
Laminin, an extracellular matrix protein, is widely expressed in the central nervous system (CNS). By interacting with integrin and non-integrin receptors, laminin exerts a large variety of important functions in the CNS in both physiological and pathological conditions. Due to the existence of many laminin isoforms and their differential expression in various cell types in the CNS, the exact functions of each individual laminin molecule in CNS development and homeostasis remain largely unclear. In this review, we first briefly introduce the structure and biochemistry of laminins and their receptors. Next, the dynamic expression of laminins and their receptors in the CNS during both development and in adulthood is summarized in a cell-type-specific manner, which allows appreciation of their functional redundancy/compensation. Furthermore, we discuss the biological functions of laminins and their receptors in CNS development, blood-brain barrier (BBB) maintenance, neurodegeneration, stroke, and neuroinflammation. Last, key challenges and potential future research directions are summarized and discussed. Our goals are to provide a synthetic review to stimulate future studies and promote the formation of new ideas/hypotheses and new lines of research in this field.
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Affiliation(s)
- Abhijit Nirwane
- Department of Pharmaceutical and Biomedical Sciences, University of Georgia, 240 W Green Street, Athens, GA 30602, U.S.A
| | - Yao Yao
- Department of Pharmaceutical and Biomedical Sciences, University of Georgia, 240 W Green Street, Athens, GA 30602, U.S.A
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41
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Zhang S, Chen T, Chen N, Gao D, Shi B, Kong S, West RC, Yuan Y, Zhi M, Wei Q, Xiang J, Mu H, Yue L, Lei X, Wang X, Zhong L, Liang H, Cao S, Belmonte JCI, Wang H, Han J. Implantation initiation of self-assembled embryo-like structures generated using three types of mouse blastocyst-derived stem cells. Nat Commun 2019; 10:496. [PMID: 30700702 PMCID: PMC6353907 DOI: 10.1038/s41467-019-08378-9] [Citation(s) in RCA: 67] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Accepted: 01/04/2019] [Indexed: 11/09/2022] Open
Abstract
Spatially ordered embryo-like structures self-assembled from blastocyst-derived stem cells can be generated to mimic embryogenesis in vitro. However, the assembly system and developmental potential of such structures needs to be further studied. Here, we devise a nonadherent-suspension-shaking system to generate self-assembled embryo-like structures (ETX-embryoids) using mouse embryonic, trophoblast and extra-embryonic endoderm stem cells. When cultured together, the three cell types aggregate and sort into lineage-specific compartments. Signaling among these compartments results in molecular and morphogenic events that closely mimic those observed in wild-type embryos. These ETX-embryoids exhibit lumenogenesis, asymmetric patterns of gene expression for markers of mesoderm and primordial germ cell precursors, and formation of anterior visceral endoderm-like tissues. After transplantation into the pseudopregnant mouse uterus, ETX-embryoids efficiently initiate implantation and trigger the formation of decidual tissues. The ability of the three cell types to self-assemble into an embryo-like structure in vitro provides a powerful model system for studying embryogenesis.
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Affiliation(s)
- Shaopeng Zhang
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, 10094, China
| | - Tianzhi Chen
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, 10094, China
| | - Naixin Chen
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, 10094, China
| | - Dengfeng Gao
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, 10094, China
| | - Bingbo Shi
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, 10094, China
| | - Shuangbo Kong
- Fujian Provincial Key Laboratory of Reproductive Health Research, Medical College of Xiamen University, Xiamen, Fujian, 361102, China
| | | | - Ye Yuan
- Colorado Center for Reproductive Medicine, Lone Tree, CO, 80124, USA
| | - Minglei Zhi
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, 10094, China
| | - Qingqing Wei
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, 10094, China
| | - Jinzhu Xiang
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, 10094, China
| | - Haiyuan Mu
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, 10094, China
| | - Liang Yue
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, 10094, China
| | - Xiaohua Lei
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Xuepeng Wang
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Liang Zhong
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Hui Liang
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, 10094, China
| | - Suying Cao
- Animal Science and Technology College, Beijing University of Agriculture, Beijing, 102206, China
| | | | - Haibin Wang
- Fujian Provincial Key Laboratory of Reproductive Health Research, Medical College of Xiamen University, Xiamen, Fujian, 361102, China
| | - Jianyong Han
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, 10094, China. .,Advanced Innovation Center for Food Nutrition and Human Health, China Agricultural University, Beijing, 100083, China.
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42
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Edwards DN, Bix GJ. Roles of blood-brain barrier integrins and extracellular matrix in stroke. Am J Physiol Cell Physiol 2018; 316:C252-C263. [PMID: 30462535 DOI: 10.1152/ajpcell.00151.2018] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Ischemicstroke is a leading cause of death and disability in the United States, but recent advances in treatments [i.e., endovascular thrombectomy and tissue plasminogen activator (t-PA)] that target the stroke-causing blood clot, while improving overall stroke mortality rates, have had much less of an impact on overall stroke morbidity. This may in part be attributed to the lack of therapeutics targeting reperfusion-induced injury after the blood clot has been removed, which, if left unchecked, can expand injury from its core into the surrounding at risk tissue (penumbra). This occurs in two phases of increased permeability of the blood-brain barrier, a physical barrier that under physiologic conditions regulates brain influx and efflux of substances and consists of tight junction forming endothelial cells (and transporter proteins), astrocytes, pericytes, extracellular matrix, and their integrin cellular receptors. During, embryonic development, maturity, and following stroke reperfusion, cerebral vasculature undergoes significant changes including changes in expression of integrins and degradation of surrounding extracellular matrix. Integrins, heterodimers with α and β subunits, and their extracellular matrix ligands, a collection of proteoglycans, glycoproteins, and collagens, have been modestly studied in the context of stroke compared with other diseases (e.g., cancer). In this review, we describe the effect that various integrins and extracellular matrix components have in embryonic brain development, and how this changes in both maturity and in the poststroke environment. Particular focus will be on how these changes in integrins and the extracellular matrix affect blood-brain barrier components and their potential as diagnostic and therapeutic targets for ischemic stroke.
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Affiliation(s)
- Danielle N Edwards
- Sanders-Brown Center on Aging, University of Kentucky , Lexington, Kentucky.,Department of Neuroscience, University of Kentucky , Lexington, Kentucky
| | - Gregory J Bix
- Sanders-Brown Center on Aging, University of Kentucky , Lexington, Kentucky.,Department of Neuroscience, University of Kentucky , Lexington, Kentucky.,Department of Neurology, University of Kentucky , Lexington, Kentucky.,Department of Neurosurgery, University of Kentucky , Lexington, Kentucky
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43
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Shahbazi MN, Zernicka-Goetz M. Deconstructing and reconstructing the mouse and human early embryo. Nat Cell Biol 2018; 20:878-887. [PMID: 30038253 DOI: 10.1038/s41556-018-0144-x] [Citation(s) in RCA: 120] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Accepted: 06/15/2018] [Indexed: 02/07/2023]
Abstract
The emergence of form and function during mammalian embryogenesis is a complex process that involves multiple regulatory levels. The foundations of the body plan are laid throughout the first days of post-implantation development as embryonic stem cells undergo symmetry breaking and initiate lineage specification, in a process that coincides with a global morphological reorganization of the embryo. Here, we review experimental models and how they have shaped our current understanding of the post-implantation mammalian embryo.
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Affiliation(s)
- Marta N Shahbazi
- Department of Physiology, Development and Neuroscience, Mammalian Embryo and Stem Cell Group, University of Cambridge, Cambridge, UK.
| | - Magdalena Zernicka-Goetz
- Department of Physiology, Development and Neuroscience, Mammalian Embryo and Stem Cell Group, University of Cambridge, Cambridge, UK.
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44
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Takeuchi M, Seki M, Furukawa E, Takahashi A, Saito K, Kobayashi M, Ezoe K, Fukui E, Yoshizawa M, Matsumoto H. Improvement of implantation potential in mouse blastocysts derived from IVF by combined treatment with prolactin, epidermal growth factor and 4-hydroxyestradiol. Mol Hum Reprod 2018; 23:557-570. [PMID: 28810691 DOI: 10.1093/molehr/gax035] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2017] [Accepted: 06/07/2017] [Indexed: 12/20/2022] Open
Abstract
STUDY QUESTION Can supplementation of medium with prolactin (PRL), epidermal growth factor (EGF) and 4-hydroxyestradiol (4-OH-E2) prior to embryo transfer improve implantation potential in mouse blastocysts derived from IVF? SUMMARY ANSWER Combined treatment with PRL, EGF and 4-OH-E2 improves mouse blastocyst implantation rates, while alone, each factor is ineffective. WHAT IS KNOWN ALREADY Blastocyst dormancy during delayed implantation caused by ovariectomy is maintained by continued progesterone treatment in mice, and estrogen injection rapidly activates blastocysts to implantation-induced status in vivo. While the expression of many proteins is upregulated in implantation-induced blastocysts, selective proteolysis by proteasomes, such as estrogen receptor α (ESR1), occurs in implantation-induced blastocysts to achieve implantation-competent status. It is worth evaluating the proteins expressed during these periods to identify humoral factors that might improve the implantation potential of IVF-derived blastocysts because the poor quality of embryos obtained by IVF is one of the major causes of implantation failure. STUDY DESIGN, SIZE, DURATION Superovulated oocytes from ICR mice were fertilized with spermatozoa and then cultured in vitro in potassium simplex optimized medium (KSOM) without phenol red (KSOM-P) for 90-96 h. Blastocysts were treated with PRL (10 or 20 mIU/mL), EGF (5 or 10 ng/mL) or 4-OH-E2 (1 or 10 nM) in KSOM-P for 24 h. PARTICIPANTS/MATERIALS, SETTING, METHODS Levels of breast cancer 1 (BRCA1), EGF receptor (EGFR, also known as ERBB1), ERBB4, tubulointerstitial nephritis antigen-like 1 (TINAGL1) and ESR1 protein were examined with immunohistochemical analysis using immunofluorescence methods and confocal laser scanning microscopy. For embryo transfer, six blastocysts were suspended in HEPES-buffered KSOM-P medium and transferred into the uteri of recipient mice on the morning of Day 4 (0900-1000 h) of pseudopregnancy (Day 1 = vaginal plug). The number of implantation sites was then recorded on Day 6 using the blue dye method. MAIN RESULTS AND THE ROLE OF CHANCE PRL, EGF and 4-OH-E2 each promoted BRCA1 protein level in the trophectoderm (TE). While PRL treatment resulted in an increase in EGFR, EGF increased both EGFR and ERBB4 in the blastocyst TE. TINAGL1 in the TE was enhanced by 4-OH-E2, which also increased localization of this protein to the basement membrane. Treatment with PRL, EGF or 4-OH-E2 alone did not improve blastocyst implantation rates. Combined treatment with PRL, EGF and 4-OH-E2 resulted in increased levels of EGFR, ERBB4, TINAGL1 and BRCA1 in the TE, whereas ESR1 was not upregulated in the treated blastocysts. Furthermore, combined treatment with PRL, EGF and 4-OH-E2 improved blastocyst implantation rates versus control (P = 0.009). LARGE SCALE DATA Not applicable. LIMITATIONS, REASONS FOR CAUTION Our studies were carried out in a mouse model, and the conclusions were drawn from limited results obtained from one species. Whether the increase in EGFR, ERBB4 and TINAGL1 protein in the TE improves implantation potential of blastocysts needs to be further studied experimentally by assessing other expressed proteins. The influence of combined supplementation in vitro of PRL, EGF and 4-OH-E2 on implantation also requires further examination and optimization in human blastocysts before it can be considered for clinical use in ART. WIDER IMPLICATIONS OF THE FINDINGS Enhanced implantation potential by combined treatment with PRL, EGF and 4-OH-E2 appears to result in the upregulation of at least two distinct mechanisms, namely signaling via EGF receptors and basement membrane formation during the peri-implantation period in mice. While PRL, EGF and 4-OH-E2 each promoted BRCA1 protein level in the TE, treatment with each alone did not improve blastocyst implantation. Therefore, BRCA1 protein appears to be unnecessary for the attachment reaction in blastocysts in mice Combined supplementation of PRL, EGF and 4-OH-E2 might also be of relevance for embryo transfer of human IVF-derived blastocysts for ART. STUDY FUNDING/COMPETING INTEREST(S) This work was supported in part by the JSPS KAKENHI [Grant numbers 22580316 and 25450390 (to H.M.)] and the Joint Research Project of Japan-U.S. Cooperative Science Program (to H.M.). The authors have no conflict of interest to declare.
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Affiliation(s)
- Miki Takeuchi
- Laboratory of Animal Breeding and Reproduction, Division of Animal Science, Faculty of Agriculture, Utsunomiya University, 350 Mine-Machi, Utsunomiya, Tochigi 321-8505, Japan
| | - Misato Seki
- Laboratory of Animal Breeding and Reproduction, Division of Animal Science, Faculty of Agriculture, Utsunomiya University, 350 Mine-Machi, Utsunomiya, Tochigi 321-8505, Japan
| | - Etsuko Furukawa
- Laboratory of Animal Breeding and Reproduction, Division of Animal Science, Faculty of Agriculture, Utsunomiya University, 350 Mine-Machi, Utsunomiya, Tochigi 321-8505, Japan
| | - Akihito Takahashi
- Laboratory of Animal Breeding and Reproduction, Division of Animal Science, Faculty of Agriculture, Utsunomiya University, 350 Mine-Machi, Utsunomiya, Tochigi 321-8505, Japan
| | - Kyosuke Saito
- Laboratory of Animal Breeding and Reproduction, Division of Animal Science, Faculty of Agriculture, Utsunomiya University, 350 Mine-Machi, Utsunomiya, Tochigi 321-8505, Japan
| | - Mitsuru Kobayashi
- Laboratory of Animal Breeding and Reproduction, Division of Animal Science, Faculty of Agriculture, Utsunomiya University, 350 Mine-Machi, Utsunomiya, Tochigi 321-8505, Japan
| | - Kenji Ezoe
- Laboratory of Animal Breeding and Reproduction, Division of Animal Science, Faculty of Agriculture, Utsunomiya University, 350 Mine-Machi, Utsunomiya, Tochigi 321-8505, Japan
| | - Emiko Fukui
- Laboratory of Animal Breeding and Reproduction, Division of Animal Science, Faculty of Agriculture, Utsunomiya University, 350 Mine-Machi, Utsunomiya, Tochigi 321-8505, Japan.,Center for Bioscience Research and Education, Utsunomiya University, 350 Mine-Machi, Utsunomiya, Tochigi 321-8505, Japan
| | - Midori Yoshizawa
- Laboratory of Animal Breeding and Reproduction, Division of Animal Science, Faculty of Agriculture, Utsunomiya University, 350 Mine-Machi, Utsunomiya, Tochigi 321-8505, Japan.,Center for Bioscience Research and Education, Utsunomiya University, 350 Mine-Machi, Utsunomiya, Tochigi 321-8505, Japan
| | - Hiromichi Matsumoto
- Laboratory of Animal Breeding and Reproduction, Division of Animal Science, Faculty of Agriculture, Utsunomiya University, 350 Mine-Machi, Utsunomiya, Tochigi 321-8505, Japan.,Center for Bioscience Research and Education, Utsunomiya University, 350 Mine-Machi, Utsunomiya, Tochigi 321-8505, Japan
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Abstract
Edema is typically presented as a secondary effect from injury, illness, disease, or medication, and its impact on patient wellness is nested within the underlying etiology. Therefore, it is often thought of more as an amplifier to current preexisting conditions. Edema, however, can be an independent risk factor for patient deterioration. Improper management of edema is costly not only to the patient, but also to treatment and care facilities, as mismanagement of edema results in increased lengths of hospital stay. Direct tissue trauma, disease, or inappropriate resuscitation and/or ventilation strategies result in edema formation through physical disruption and chemical messenger-based structural modifications of the microvascular barrier. Derangements in microvascular barrier function limit tissue oxygenation, nutrient flow, and cellular waste removal. Recent studies have sought to elucidate cellular signaling and structural alterations that result in vascular hyperpermeability in a variety of critical care conditions to include hemorrhage, burn trauma, and sepsis. These studies and many others have highlighted how multiple mechanisms alter paracellular and/or transcellular pathways promoting hyperpermeability. Roles for endothelial glycocalyx, extracellular matrix and basement membrane, vesiculo-vacuolar organelles, cellular junction and cytoskeletal proteins, and vascular pericytes have been described, demonstrating the complexity of microvascular barrier regulation. Understanding these basic mechanisms inside and out of microvessels aid in developing better treatment strategies to mitigate the harmful effects of excessive edema formation.
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46
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Coble JL, Sheldon KE, Yue F, Salameh TJ, Harris LR, Deiling S, Ruggiero FM, Eshelman MA, Yochum GS, Koltun WA, Gerhard GS, Broach JR. Identification of a rare LAMB4 variant associated with familial diverticulitis through exome sequencing. Hum Mol Genet 2018; 26:3212-3220. [PMID: 28595269 DOI: 10.1093/hmg/ddx204] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2017] [Accepted: 05/23/2017] [Indexed: 12/13/2022] Open
Abstract
Diverticulitis is a chronic disease of the colon in which diverticuli, or outpouching through the colonic wall, become inflamed. Although recent observations suggest that genetic factors may play a significant role in diverticulitis, few genes have yet been implicated in disease pathogenesis and familial cases are uncommon. Here, we report results of whole exome sequencing performed on members from a single multi-generational family with early onset diverticulitis in order to identify a genetic component of the disease. We identified a rare single nucleotide variant in the laminin β 4 gene (LAMB4) that segregated with disease in a dominant pattern and causes a damaging missense substitution (D435N). Targeted sequencing of LAMB4 in 148 non-familial and unrelated sporadic diverticulitis patients identified two additional rare variants in the gene. Immunohistochemistry indicated that LAMB4 localizes to the myenteric plexus of colonic tissue and patients harboring LAMB4 variants exhibited reduced LAMB4 protein levels relative to controls. Laminins are constituents of the extracellular matrix and play a major role in regulating the development and function of the enteric nervous system. Reduced LAMB4 levels may therefore alter innervation and morphology of the enteric nervous system, which may contribute to colonic dysmotility associated with diverticulitis.
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Affiliation(s)
- Joel L Coble
- Department of Biochemistry and Molecular Biology
| | | | - Feng Yue
- Department of Biochemistry and Molecular Biology
| | | | | | - Sue Deiling
- Department of Surgery, Division of Colon and Rectal Surgery
| | - Francesca M Ruggiero
- Division of Anatomical Pathology, The Pennsylvania State University College of Medicine, Hershey, PA 17033, USA
| | | | - Gregory S Yochum
- Department of Biochemistry and Molecular Biology.,Department of Surgery, Division of Colon and Rectal Surgery
| | | | - Glenn S Gerhard
- Department of Medical Genetics and Molecular Biochemistry, Temple University College of Medicine, Philadelphia, PA 19140, USA
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47
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Wang L, Koutelou E, Hirsch C, McCarthy R, Schibler A, Lin K, Lu Y, Jeter C, Shen J, Barton MC, Dent SYR. GCN5 Regulates FGF Signaling and Activates Selective MYC Target Genes during Early Embryoid Body Differentiation. Stem Cell Reports 2017; 10:287-299. [PMID: 29249668 PMCID: PMC5768892 DOI: 10.1016/j.stemcr.2017.11.009] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Revised: 11/14/2017] [Accepted: 11/14/2017] [Indexed: 12/12/2022] Open
Abstract
Precise control of gene expression during development is orchestrated by transcription factors and co-regulators including chromatin modifiers. How particular chromatin-modifying enzymes affect specific developmental processes is not well defined. Here, we report that GCN5, a histone acetyltransferase essential for embryonic development, is required for proper expression of multiple genes encoding components of the fibroblast growth factor (FGF) signaling pathway in early embryoid bodies (EBs). Gcn5-/- EBs display deficient activation of ERK and p38, mislocalization of cytoskeletal components, and compromised capacity to differentiate toward mesodermal lineage. Genomic analyses identified seven genes as putative direct targets of GCN5 during early differentiation, four of which are cMYC targets. These findings established a link between GCN5 and the FGF signaling pathway and highlighted specific GCN5-MYC partnerships in gene regulation during early differentiation.
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Affiliation(s)
- Li Wang
- Department of Epigenetics and Molecular Carcinogenesis, The University of Texas MD Anderson Cancer Center, Smithville, TX 78957, USA; Center for Cancer Epigenetics, The University of Texas MD Anderson Cancer Center, Smithville, TX 78957, USA; Program in Epigenetics and Molecular Carcinogenesis, The Graduate School of Biomedical Sciences (GSBS) of the University of Texas Health Science Center at Houston, Houston, TX 77030, USA
| | - Evangelia Koutelou
- Department of Epigenetics and Molecular Carcinogenesis, The University of Texas MD Anderson Cancer Center, Smithville, TX 78957, USA; Center for Cancer Epigenetics, The University of Texas MD Anderson Cancer Center, Smithville, TX 78957, USA
| | - Calley Hirsch
- Department of Epigenetics and Molecular Carcinogenesis, The University of Texas MD Anderson Cancer Center, Smithville, TX 78957, USA; Center for Cancer Epigenetics, The University of Texas MD Anderson Cancer Center, Smithville, TX 78957, USA
| | - Ryan McCarthy
- Department of Epigenetics and Molecular Carcinogenesis, The University of Texas MD Anderson Cancer Center, Smithville, TX 78957, USA; Center for Cancer Epigenetics, The University of Texas MD Anderson Cancer Center, Smithville, TX 78957, USA
| | - Andria Schibler
- Department of Epigenetics and Molecular Carcinogenesis, The University of Texas MD Anderson Cancer Center, Smithville, TX 78957, USA; Center for Cancer Epigenetics, The University of Texas MD Anderson Cancer Center, Smithville, TX 78957, USA; Program in Genes and Development, The Graduate School of Biomedical Sciences (GSBS) of the University of Texas Health Science Center at Houston, Houston, TX 77030, USA
| | - Kevin Lin
- Department of Epigenetics and Molecular Carcinogenesis, The University of Texas MD Anderson Cancer Center, Smithville, TX 78957, USA; Center for Cancer Epigenetics, The University of Texas MD Anderson Cancer Center, Smithville, TX 78957, USA
| | - Yue Lu
- Department of Epigenetics and Molecular Carcinogenesis, The University of Texas MD Anderson Cancer Center, Smithville, TX 78957, USA; Center for Cancer Epigenetics, The University of Texas MD Anderson Cancer Center, Smithville, TX 78957, USA
| | - Collene Jeter
- Department of Epigenetics and Molecular Carcinogenesis, The University of Texas MD Anderson Cancer Center, Smithville, TX 78957, USA
| | - Jianjun Shen
- Department of Epigenetics and Molecular Carcinogenesis, The University of Texas MD Anderson Cancer Center, Smithville, TX 78957, USA
| | - Michelle C Barton
- Department of Epigenetics and Molecular Carcinogenesis, The University of Texas MD Anderson Cancer Center, Smithville, TX 78957, USA; Center for Cancer Epigenetics, The University of Texas MD Anderson Cancer Center, Smithville, TX 78957, USA; Program in Epigenetics and Molecular Carcinogenesis, The Graduate School of Biomedical Sciences (GSBS) of the University of Texas Health Science Center at Houston, Houston, TX 77030, USA; Program in Genes and Development, The Graduate School of Biomedical Sciences (GSBS) of the University of Texas Health Science Center at Houston, Houston, TX 77030, USA
| | - Sharon Y R Dent
- Department of Epigenetics and Molecular Carcinogenesis, The University of Texas MD Anderson Cancer Center, Smithville, TX 78957, USA; Center for Cancer Epigenetics, The University of Texas MD Anderson Cancer Center, Smithville, TX 78957, USA; Program in Epigenetics and Molecular Carcinogenesis, The Graduate School of Biomedical Sciences (GSBS) of the University of Texas Health Science Center at Houston, Houston, TX 77030, USA; Program in Genes and Development, The Graduate School of Biomedical Sciences (GSBS) of the University of Texas Health Science Center at Houston, Houston, TX 77030, USA.
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48
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Devergne O, Sun GH, Schüpbach T. Stratum, a Homolog of the Human GEF Mss4, Partnered with Rab8, Controls the Basal Restriction of Basement Membrane Proteins in Epithelial Cells. Cell Rep 2017; 18:1831-1839. [PMID: 28228250 DOI: 10.1016/j.celrep.2017.02.002] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2016] [Revised: 12/18/2016] [Accepted: 01/30/2017] [Indexed: 01/13/2023] Open
Abstract
The basement membrane (BM), a sheet of extracellular matrix lining the basal side of epithelia, is essential for epithelial cell function and integrity, yet the mechanisms that control the basal restriction of BM proteins are poorly understood. In epithelial cells, a specialized pathway is dedicated to restrict the deposition of BM proteins basally. Here, we report the identification of a factor in this pathway, a homolog of the mammalian guanine nucleotide exchange factor (GEF) Mss4, which we have named Stratum. The loss of Stratum leads to the missecretion of BM proteins at the apical side of the cells, forming aberrant layers in close contact with the plasma membrane. We found that Rab8GTPase acts downstream of Stratum in this process. Altogether, our results uncover the importance of this GEF/Rab complex in specifically coordinating the basal restriction of BM proteins, a critical process for the establishment and maintenance of epithelial cell polarity.
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Affiliation(s)
- Olivier Devergne
- Department of Molecular Biology, Princeton University, Princeton, NJ 08544, USA
| | - Gina H Sun
- Department of Molecular Biology, Princeton University, Princeton, NJ 08544, USA
| | - Trudi Schüpbach
- Department of Molecular Biology, Princeton University, Princeton, NJ 08544, USA.
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49
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Matsubayashi Y, Louani A, Dragu A, Sánchez-Sánchez BJ, Serna-Morales E, Yolland L, Gyoergy A, Vizcay G, Fleck RA, Heddleston JM, Chew TL, Siekhaus DE, Stramer BM. A Moving Source of Matrix Components Is Essential for De Novo Basement Membrane Formation. Curr Biol 2017; 27:3526-3534.e4. [PMID: 29129537 PMCID: PMC5714436 DOI: 10.1016/j.cub.2017.10.001] [Citation(s) in RCA: 72] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Revised: 08/11/2017] [Accepted: 10/02/2017] [Indexed: 12/31/2022]
Abstract
The basement membrane (BM) is a thin layer of extracellular matrix (ECM) beneath nearly all epithelial cell types that is critical for cellular and tissue function. It is composed of numerous components conserved among all bilaterians [1]; however, it is unknown how all of these components are generated and subsequently constructed to form a fully mature BM in the living animal. Although BM formation is thought to simply involve a process of self-assembly [2], this concept suffers from a number of logistical issues when considering its construction in vivo. First, incorporation of BM components appears to be hierarchical [3, 4, 5], yet it is unclear whether their production during embryogenesis must also be regulated in a temporal fashion. Second, many BM proteins are produced not only by the cells residing on the BM but also by surrounding cell types [6, 7, 8, 9], and it is unclear how large, possibly insoluble protein complexes [10] are delivered into the matrix. Here we exploit our ability to live image and genetically dissect de novo BM formation during Drosophila development. This reveals that there is a temporal hierarchy of BM protein production that is essential for proper component incorporation. Furthermore, we show that BM components require secretion by migrating macrophages (hemocytes) during their developmental dispersal, which is critical for embryogenesis. Indeed, hemocyte migration is essential to deliver a subset of ECM components evenly throughout the embryo. This reveals that de novo BM construction requires a combination of both production and distribution logistics allowing for the timely delivery of core components. Macrophages are major producers of basement membrane in the Drosophila embryo Basement membrane components require hierarchical deposition during development Macrophage migration is essential to evenly deliver a subset of matrix components Uneven macrophage dispersal leads to uneven matrix incorporation and lethality
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Affiliation(s)
- Yutaka Matsubayashi
- Randall Centre for Cell and Molecular Biophysics, King's College London, London SE1 1UL, UK.
| | - Adam Louani
- Randall Centre for Cell and Molecular Biophysics, King's College London, London SE1 1UL, UK
| | - Anca Dragu
- Randall Centre for Cell and Molecular Biophysics, King's College London, London SE1 1UL, UK
| | | | - Eduardo Serna-Morales
- Randall Centre for Cell and Molecular Biophysics, King's College London, London SE1 1UL, UK
| | - Lawrence Yolland
- Randall Centre for Cell and Molecular Biophysics, King's College London, London SE1 1UL, UK
| | - Attila Gyoergy
- Institute of Science and Technology, Am Campus 1, 3400 Klosterneuburg, Austria
| | - Gema Vizcay
- Centre for Ultrastructure Imaging, King's College London, London SE1 1UL, UK
| | - Roland A Fleck
- Centre for Ultrastructure Imaging, King's College London, London SE1 1UL, UK
| | - John M Heddleston
- Advanced Imaging Center, Howard Hughes Medical Institute, Janelia Research Campus, Ashburn, VA 20147, USA
| | - Teng-Leong Chew
- Advanced Imaging Center, Howard Hughes Medical Institute, Janelia Research Campus, Ashburn, VA 20147, USA
| | - Daria E Siekhaus
- Institute of Science and Technology, Am Campus 1, 3400 Klosterneuburg, Austria
| | - Brian M Stramer
- Randall Centre for Cell and Molecular Biophysics, King's College London, London SE1 1UL, UK.
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50
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Samuelsson AR, Belvindrah R, Wu C, Müller U, Halfter W. β1-Integrin Signaling is Essential for Lens Fiber Survival. GENE REGULATION AND SYSTEMS BIOLOGY 2017. [DOI: 10.1177/117762500700100016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Integrins have been proposed to play a major role in lens morphogenesis. To determine the role of β1-integrin and its down-stream signaling partner, integrin linked kinase (ILK), in lens morphogenesis, eyes of WT mice and mice with a nestin-linked conditional knockout of β1-integrin or ILK were analyzed for defects in lens development. Mice, lacking the genes encoding the p1-integrin subunit ( Itgb1) or ILK ( Ilk), showed a perinatal degeneration of the lens. Early signs of lens degeneration included vacuolization, random distribution of lens cell nuclei, disrupted fiber morphology and attenuation and separation of the lens capsule. The phenotype became progressively more severe during the first postnatal week eventually leading to the complete loss of the lens. A more severe phenotype was observed in ILK mutants at similar stages. Eyes from embryonic day 13 β1-integrin-mutant embryos showed no obvious signs of lens degeneration, indicating that mutant lens develops normally until peri-recombination. Our findings suggest that β1-integrins and ILK cooperate to control lens cell survival and link lens fibers to the surrounding extracellular matrix. The assembly and integrity of the lens capsule also appears to be reliant on integrin signaling within lens fibers. Extrapolation of these results indicates a novel role of integrins in lens cell-cell adhesions as well as a potential role in the pathogenesis of congenital cataracts.
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Affiliation(s)
- Andrew R. Samuelsson
- Department of Neurobiology, University of Pittsburgh, 1402 E Biological Science Tower, Pittsburgh PA 15261
| | - Richard Belvindrah
- Department of Cell Biology and Institute for Childhood and Neglected Disease, Scripps Research Institute, La Jolla, CA 92037
| | - Chuanyue Wu
- Department of Pathology, 707 Scaife Hall, University of Pittsburgh, Pittsburgh PA 15261
| | - Uli Müller
- Department of Cell Biology and Institute for Childhood and Neglected Disease, Scripps Research Institute, La Jolla, CA 92037
| | - Willi Halfter
- Department of Neurobiology, University of Pittsburgh, 1402 E Biological Science Tower, Pittsburgh PA 15261
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