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Hagelaars MJ, Rijns L, Dankers PYW, Loerakker S, Bouten CVC. Engineering Strategies to Move from Understanding to Steering Renal Tubulogenesis. TISSUE ENGINEERING. PART B, REVIEWS 2023; 29:203-216. [PMID: 36173101 DOI: 10.1089/ten.teb.2022.0120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Rebuilding the kidney in the context of tissue engineering offers a major challenge as the organ is structurally complex and has a high variety of specific functions. Recreation of kidney function is inherently connected to the formation of tubules since the functional subunit of the kidney, the nephron, is based on tubular structures. In vivo, tubulogenesis culminates in a perfectly shaped, patterned, and functional renal tubule via different morphogenic processes that depend on delicately orchestrated chemical, physical, and mechanical interactions between cells and between cells and their microenvironment. This review summarizes the current understanding of the role of the microenvironment in the morphogenic processes involved in in vivo renal tubulogenesis. We highlight the current state-of-the-art of renal tubular engineering and provide a view on the design elements that can be extracted from these studies. Next, we discuss how computational modeling can aid in specifying and identifying design parameters and provide directions on how these design parameters can be incorporated in biomaterials for the purpose of engineering renal tubulogenesis. Finally, we propose that a step-by-step reciprocal interaction between understanding and engineering is necessary to effectively guide renal tubulogenesis. Impact statement Tubular tissue engineering lies at the foundation of regenerating kidney tissue function, as the functional subunit of the kidney, the nephron, is based on tubular structures. Guiding renal tubulogenesis toward functional renal tubules requires in-depth knowledge of the developmental processes that lead to the formation of native tubules as well as engineering approaches to steer these processes. In this study, we review the role of the microenvironment in the developmental processes that lead to functional renal tubules and give directions how this knowledge can be harnessed for biomaterial-based tubular engineering using computational models.
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Affiliation(s)
- Maria J Hagelaars
- Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands
- Institute for Complex Molecular Systems (ICMS), Eindhoven, The Netherlands
| | - Laura Rijns
- Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands
- Institute for Complex Molecular Systems (ICMS), Eindhoven, The Netherlands
| | - Patricia Y W Dankers
- Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands
- Institute for Complex Molecular Systems (ICMS), Eindhoven, The Netherlands
| | - Sandra Loerakker
- Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands
- Institute for Complex Molecular Systems (ICMS), Eindhoven, The Netherlands
| | - Carlijn V C Bouten
- Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands
- Institute for Complex Molecular Systems (ICMS), Eindhoven, The Netherlands
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2
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Lacueva-Aparicio A, Lindoso RS, Mihăilă SM, Giménez I. Role of extracellular matrix components and structure in new renal models in vitro. Front Physiol 2022; 13:1048738. [PMID: 36569770 PMCID: PMC9767975 DOI: 10.3389/fphys.2022.1048738] [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: 09/19/2022] [Accepted: 10/31/2022] [Indexed: 12/12/2022] Open
Abstract
The extracellular matrix (ECM), a complex set of fibrillar proteins and proteoglycans, supports the renal parenchyma and provides biomechanical and biochemical cues critical for spatial-temporal patterning of cell development and acquisition of specialized functions. As in vitro models progress towards biomimicry, more attention is paid to reproducing ECM-mediated stimuli. ECM's role in in vitro models of renal function and disease used to investigate kidney injury and regeneration is discussed. Availability, affordability, and lot-to-lot consistency are the main factors determining the selection of materials to recreate ECM in vitro. While simpler components can be synthesized in vitro, others must be isolated from animal or human tissues, either as single isolated components or as complex mixtures, such as Matrigel or decellularized formulations. Synthetic polymeric materials with dynamic and instructive capacities are also being explored for cell mechanical support to overcome the issues with natural products. ECM components can be used as simple 2D coatings or complex 3D scaffolds combining natural and synthetic materials. The goal is to recreate the biochemical signals provided by glycosaminoglycans and other signaling molecules, together with the stiffness, elasticity, segmentation, and dimensionality of the original kidney tissue, to support the specialized functions of glomerular, tubular, and vascular compartments. ECM mimicking also plays a central role in recent developments aiming to reproduce renal tissue in vitro or even in therapeutical strategies to regenerate renal function. Bioprinting of renal tubules, recellularization of kidney ECM scaffolds, and development of kidney organoids are examples. Future solutions will probably combine these technologies.
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Affiliation(s)
- Alodia Lacueva-Aparicio
- Renal and Cardiovascular Physiopathology (FISIOPREN), Aragon’s Health Sciences Institute, Zaragoza, Spain,Tissue Microenvironment Lab (TME Lab), I3A, University of Zaragoza, Zaragoza, Spain
| | - Rafael Soares Lindoso
- Carlos Chagas Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Silvia M. Mihăilă
- Division of Pharmacology, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, Netherlands
| | - Ignacio Giménez
- Renal and Cardiovascular Physiopathology (FISIOPREN), Aragon’s Health Sciences Institute, Zaragoza, Spain,Institute for Health Research Aragon (IIS Aragon), Zaragoza, Spain,School of Medicine, University of Zaragoza, Zaragoza, Spain,*Correspondence: Ignacio Giménez,
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3
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Bongolan T, Whiteley J, Castillo-Prado J, Fantin A, Larsen B, Wong CJ, Mazilescu L, Kawamura M, Urbanellis P, Jonebring A, Salter E, Collingridge G, Gladdy R, Hicks R, Gingras AC, Selzner M, Rogers IM. Decellularization of porcine kidney with submicellar concentrations of SDS results in the retention of ECM proteins required for the adhesion and maintenance of human adult renal epithelial cells. Biomater Sci 2022; 10:2972-2990. [PMID: 35521809 DOI: 10.1039/d1bm01017d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
When decellularizing kidneys, it is important to maintain the integrity of the acellular extracellular matrix (ECM), including associated adhesion proteins and growth factors that allow recellularized cells to adhere and migrate according to ECM specificity. Kidney decellularization requires the ionic detergent sodium dodecyl sulfate (SDS); however, this results in a loss of ECM proteins important for cell adherence, migration, and growth, particularly glycosaminoglycan (GAG)-associated proteins. Here, we demonstrate that using submicellar concentrations of SDS results in a greater retention of structural proteins, GAGs, growth factors, and cytokines. When porcine kidney ECM scaffolds were recellularized using human adult primary renal epithelial cells (RECs), the ECM promoted cell survival and the uniform distribution of cells throughout the ECM. Cells maintained the expression of mature renal epithelial markers but did not organize on the ECM, indicating that mature cells are unable to migrate to specific locations on ECM scaffolds.
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Affiliation(s)
- Tonya Bongolan
- Department of Physiology, University of Toronto, Toronto, ON, M5S 1A8, Canada.,Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, ON, M5G 1X5, Canada.
| | - Jennifer Whiteley
- Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, ON, M5G 1X5, Canada.
| | - Jorge Castillo-Prado
- Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, ON, M5G 1X5, Canada.
| | - Amanda Fantin
- Department of Physiology, University of Toronto, Toronto, ON, M5S 1A8, Canada.,Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, ON, M5G 1X5, Canada.
| | - Brett Larsen
- Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, ON, M5G 1X5, Canada.
| | - Cassandra J Wong
- Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, ON, M5G 1X5, Canada.
| | - Laura Mazilescu
- Toronto General Hospital Research Institute, Toronto, ON, M5G 2C4, Canada.,Soham & Shaila Ajmera Family Transplant Centre, University Health Network, Toronto, ON, M5G 2C4, Canada
| | - Masataka Kawamura
- Toronto General Hospital Research Institute, Toronto, ON, M5G 2C4, Canada.,Soham & Shaila Ajmera Family Transplant Centre, University Health Network, Toronto, ON, M5G 2C4, Canada
| | - Peter Urbanellis
- Toronto General Hospital Research Institute, Toronto, ON, M5G 2C4, Canada.,Soham & Shaila Ajmera Family Transplant Centre, University Health Network, Toronto, ON, M5G 2C4, Canada
| | - Anna Jonebring
- Discovery Biology, Discovery Sciences, R&D, AstraZeneca, Gothenburg, 431 83, Sweden
| | - Eric Salter
- Department of Physiology, University of Toronto, Toronto, ON, M5S 1A8, Canada.,Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, ON, M5G 1X5, Canada.
| | - Graham Collingridge
- Department of Physiology, University of Toronto, Toronto, ON, M5S 1A8, Canada.,Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, ON, M5G 1X5, Canada.
| | - Rebecca Gladdy
- Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, ON, M5G 1X5, Canada. .,Institute of Medical Science, University of Toronto, Toronto, ON, M5S1A8, Canada
| | - Ryan Hicks
- BioPharmaceuticals R&D Cell Therapy Department, Research and Early Development, Cardiovascular, Renal, and Metabolism (CVRM), BioPharmaceuticals R&D, AstraZeneca, Gothenburg, 431 83, Sweden
| | - Anne-Claude Gingras
- Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, ON, M5G 1X5, Canada. .,Department of Molecular Genetics, University of Toronto, Toronto, ON, M5G1E2, Canada
| | - Markus Selzner
- Toronto General Hospital Research Institute, Toronto, ON, M5G 2C4, Canada.,Soham & Shaila Ajmera Family Transplant Centre, University Health Network, Toronto, ON, M5G 2C4, Canada
| | - Ian M Rogers
- Department of Physiology, University of Toronto, Toronto, ON, M5S 1A8, Canada.,Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, ON, M5G 1X5, Canada. .,Soham & Shaila Ajmera Family Transplant Centre, University Health Network, Toronto, ON, M5G 2C4, Canada.,Department of Obstetrics and Gynecology, University of Toronto, Toronto, ON, M5G1E2, Canada
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4
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Kim JW, Nam SA, Yi J, Kim JY, Lee JY, Park S, Sen T, Choi Y, Lee JY, Kim HL, Kim HW, Park J, Cho D, Kim YK. Kidney Decellularized Extracellular Matrix Enhanced the Vascularization and Maturation of Human Kidney Organoids. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2103526. [PMID: 35322595 PMCID: PMC9130892 DOI: 10.1002/advs.202103526] [Citation(s) in RCA: 30] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Revised: 03/02/2022] [Indexed: 05/27/2023]
Abstract
Kidney organoids derived from human pluripotent stem cells (hPSCs) have extensive potential for disease modelling and regenerative medicine. However, the limited vascularization and immaturity of kidney organoids have been still remained to overcome. Extracellular matrix (ECM) can provide mechanical support and a biochemical microenvironment for cell growth and differentiation. Here in vitro methods using a kidney decellularized extracellular matrix (dECM) hydrogel to culture hPSC-derived kidney organoids, which have extensive vascular network and their own endothelial cells, are reported. Single-cell transcriptomics reveal that the vascularized kidney organoids cultured using the kidney dECM have more mature patterns of glomerular development and higher similarity to human kidney than those cultured without the kidney dECM. Differentiation of α-galactosidase A (GLA)-knock-out hPSCs generated using CRISPR/Cas9 into kidney organoids by the culture method using kidney dECM efficiently recapitulate Fabry nephropathy with vasculopathy. Transplantation of kidney organoids with kidney dECM into kidney of mouse accelerates the recruitment of endothelial cells from the host mouse kidney and maintains vascular integrity with the more organized slit diaphragm-like structures than those without kidney dECM. The kidney dECM methodology for inducing extensive vascularization and maturation of kidney organoids can be applied to studies for kidney development, disease modeling, and regenerative medicine.
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Affiliation(s)
- Jin Won Kim
- Cell Death Disease Research CenterCollege of MedicineThe Catholic University of KoreaSeoul06591Korea
| | - Sun Ah Nam
- Cell Death Disease Research CenterCollege of MedicineThe Catholic University of KoreaSeoul06591Korea
| | - Jawoon Yi
- School of Life SciencesGwangju Institute of Science and TechnologyGwangju61005Korea
| | - Jae Yun Kim
- School of Interdisciplinary Bioscience and BioengineeringPohang University of Science and TechnologyPohang790‐784Korea
| | - Jong Young Lee
- Cell Death Disease Research CenterCollege of MedicineThe Catholic University of KoreaSeoul06591Korea
| | - Seo‐Yeon Park
- Cell Death Disease Research CenterCollege of MedicineThe Catholic University of KoreaSeoul06591Korea
| | - Tugce Sen
- Department of Mechanical EngineeringPohang University of Science and Technology (POSTECH)PohangKyungbuk790‐784Korea
| | - Yoo‐mi Choi
- Department of Convergence IT EngineeringPohang University of Science and TechnologyPohang790‐784Korea
| | - Jae Yeon Lee
- Department of Companion Animal HealthDaegu Haany UniversityGyeongsan790‐784Republic of Korea
| | - Hong Lim Kim
- Integrative Research Support CenterCollege of MedicineThe Catholic University of KoreaSeoul06591Korea
| | - Hyung Wook Kim
- Department of Internal MedicineThe Catholic University of KoreaSt. Vincent's HospitalSuwon16247Korea
| | - Jiwhan Park
- School of Life SciencesGwangju Institute of Science and TechnologyGwangju61005Korea
| | - Dong‐Woo Cho
- School of Interdisciplinary Bioscience and BioengineeringPohang University of Science and TechnologyPohang790‐784Korea
- Department of Mechanical EngineeringPohang University of Science and Technology (POSTECH)PohangKyungbuk790‐784Korea
| | - Yong Kyun Kim
- Cell Death Disease Research CenterCollege of MedicineThe Catholic University of KoreaSeoul06591Korea
- Department of Internal MedicineThe Catholic University of KoreaSt. Vincent's HospitalSuwon16247Korea
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5
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Abdollahzadeh F, Khoshdel-Rad N, Moghadasali R. Kidney development and function: ECM cannot be ignored. Differentiation 2022; 124:28-42. [DOI: 10.1016/j.diff.2022.02.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2021] [Revised: 01/29/2022] [Accepted: 02/04/2022] [Indexed: 11/03/2022]
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6
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van Sprang JF, de Jong SM, Dankers PY. Biomaterial-driven kidney organoid maturation. CURRENT OPINION IN BIOMEDICAL ENGINEERING 2022. [DOI: 10.1016/j.cobme.2021.100355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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7
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Expression of collagen type IV in human kidney during prenatal development. VOJNOSANIT PREGL 2022. [DOI: 10.2298/vsp200927111p] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
Background/Aim. Type IV collagen belongs to the group of nonfibrillar collagens and is an important component of the basement membranes, where it accounts for approximately 50% of its structural elements. The aim of the study was to describe the expression and distribution of collagen type IV in the embryonic and fetal metanephric kidney and to determine the volume density of collagen type IV in kidney tissue in each trimester of development. Methods. The material consisted of 19 human embryos/fetuses, in the gestational age from 8th to 37th week. Kidney tissue specimens were routinely processed to paraffin molds, stained immunohistochemically using polyclonal anti-collagen IV antibody and counterstained with Mayer hematoxylin and eosin. Stained slides were examined using a light microscope, and images of the selected areas under different lens magnification were captured with a digital camera. Volume density of collagen type IV was determined using ImageJ 1.48v and a plugin of the software, which inserted a grid system with 336 points. For the data comparison, the One-Way Analysis of Variance (ANOVA) was used. Results. Strong collagen IV immunopositivity was seen in all specimens, with a distribution in the basement membranes of urinary bud, parietal leaf of Bowman?s capsule, glomerular basement membrane, basement membrane of interstitial blood vessels, and basement membranes of nephron tubules and collecting ducts. No statistically significant difference in the volume density of type IV collagen was found among the different trimesters of the embryonic and fetal development. Conclusion. The synthesis and secretion of collagen type IV simultaneously follow the development of nephron structures, collecting system and blood vessels. The volume density of collagen type IV remains constant throughout all the trimesters of metanephric kidney development, indicating that it plays a crucial role in the normal development of nephron and collecting system structures, as well as in maintaining the normal kidney function.
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8
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Human induced pluripotent stem cell-derived kidney organoids toward clinical implementations. CURRENT OPINION IN BIOMEDICAL ENGINEERING 2021. [DOI: 10.1016/j.cobme.2021.100346] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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9
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Sobreiro‐Almeida R, Quinteira R, Neves NM. Renal Regeneration: The Role of Extracellular Matrix and Current ECM-Based Tissue Engineered Strategies. Adv Healthc Mater 2021; 10:e2100160. [PMID: 34137210 DOI: 10.1002/adhm.202100160] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Revised: 04/29/2021] [Indexed: 12/15/2022]
Abstract
Natural extracellular matrices (ECM) are currently being studied as an alternative source for organ transplantation or as new solutions to treat kidney injuries, which can evolve to end-stage renal disease, a life devastating condition. This paper provides an overview on the current knowledge in kidney ECM and its usefulness on future investigations. The composition and structure of kidney ECM is herein associated with its intrinsic capacity of remodeling and repair after insult. Moreover, it provides a deeper insight on altered ECM components during disease. The use of decellularized kidney matrices is discussed in the second part of the review, with emphasis on how these matrices contribute to tissue-specific differentiation of embryonic, pluripotent, and other stem cells. The evolution on the field toward different uses of xenogeneic ECM as a biological scaffold material is discussed, namely the major outcomes on whole kidney recellularization and its in vivo implantation. At last, the recent literature on the use of processed kidney decellularized ECM to produce diverse biomaterial substrates, such as hydrogels, membranes, and bioinks are reviewed, with emphasis on future perspectives of its translation into the clinic.
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Affiliation(s)
- Rita Sobreiro‐Almeida
- 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, Barco Guimarães 4805‐017 Portugal
- ICVS/3B's–PT Government Associate Laboratory Braga/Guimarães Portugal
| | - Rita Quinteira
- 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, Barco Guimarães 4805‐017 Portugal
- ICVS/3B's–PT Government Associate Laboratory Braga/Guimarães Portugal
| | - Nuno M. Neves
- 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, Barco Guimarães 4805‐017 Portugal
- ICVS/3B's–PT Government Associate Laboratory Braga/Guimarães Portugal
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10
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Adelfio M, Szymkowiak S, Kaplan DL. Matrigel-Free Laminin-Entactin Matrix to Induce Human Renal Proximal Tubule Structure Formation In Vitro. ACS Biomater Sci Eng 2020; 6:6618-6625. [PMID: 33320630 DOI: 10.1021/acsbiomaterials.0c01385] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A successful in vitro tissue model must recapitulate the native tissue features while also being reproducible. Currently, Matrigel is the principal biomaterial used to induce the formation of proximal convoluted tubules (PCTs) in vitro, because of its similar composition and structure with the kidney tubular basement membrane and the presence of critical growth factors. However, Matrigel is not well-defined, and batch-to-batch variability is a significant issue. Here, we define a Matrigel-free method, using a laminin-entactin (L-E) matrix to support the formation of proximal tubular-like structures in vitro using immortalized human renal epithelial cells (RPTEC/TERT1) cocultured with murine fibroblast stromal cells (FOXD1lacZ+). The matrix supports the presence of specific components of the tubular basement membrane (laminin, entactin/nidogen, and heparan sulfate proteoglycan) in addition to fibroblast growth factor 8a (FGF-8a). The matrix also induces tubulogenesis, leading to the formation of PCTs based on several key markers, including E-cadherin, aquaporin-1, and Na+/K+ ATPase. Moreover, these PCT structures displayed cell polarity and a well-defined lumen after 18 days in culture. This laminin-entactin (L-E) matrix constitutes a defined and consistent biomaterial that can be used in kidney tissue engineering for understanding in vitro proximal tubule development and for nephrotoxicity studies.
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Affiliation(s)
- M Adelfio
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts 02155, United States
| | - S Szymkowiak
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts 02155, United States
| | - D L Kaplan
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts 02155, United States
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11
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Wang C, Jiang Y, Yu K, Liu K, Wang H. Anhuienoside C Attenuates Podocyte Injury in Diabetic Nephropathy Rats. Dose Response 2020; 18:1559325820939010. [PMID: 33013249 PMCID: PMC7513418 DOI: 10.1177/1559325820939010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2020] [Revised: 05/17/2020] [Accepted: 05/29/2020] [Indexed: 12/22/2022] Open
Abstract
Objective: The present study evaluated the nephroprotective effects of anhuienoside C
(AC) against diabetic nephropathy (DN) in rats. Material and Methods: Diabetic nephropathy was induced by administration of a high-fat diet (HFD)
for 8 weeks and intraperitoneal administration of streptozotocin (STZ; 30
mg/kg) at the end of the fourth week of this protocol. Effects of AC on
blood glucose levels, renal function markers, and mediators of inflammation
in the serum of DN rats were assessed. Results: Anhuienoside C treatment reduced the blood glucose levels and attenuated the
increased levels of renal injury markers in DN rats. Anhuienoside C also
increased podocyte counts; alleviated the changes in podocin, desmin, and
nephrin protein levels; and ameliorated the altered pathophysiology in the
kidney tissues induced by DN. Compared with the DN group, the levels of
inflammatory markers and mediators of oxidative stress were reduced in the
serum and kidney tissues of the AC-treated groups. Moreover, treatment with
AC ameliorates the altered expression of podocin, nephrin, and desmin
proteins in the renal tissue of HFD/STZ-induced kidney-injured rats. Conclusion: In conclusion, AC protected against podocyte injury by regulating nuclear
factor kappa-light-chain-enhancer of activated B cells/protein kinase B
pathway in a rat model of DN.
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Affiliation(s)
- Chengjian Wang
- Department of Endocrinology, Chongqing General Hospital, University of Chinese Academy of Sciences, Chongqing, China
| | - Yingsong Jiang
- Department of Nephrology, Chongqing General Hospital, University of Chinese Academy of Sciences, Chongqing, China
| | - Keping Yu
- Department of Endocrinology, Chongqing General Hospital, University of Chinese Academy of Sciences, Chongqing, China
| | - Ke Liu
- Department of Endocrinology, Chongqing General Hospital, University of Chinese Academy of Sciences, Chongqing, China
| | - Hao Wang
- Department of Endocrinology, Chongqing General Hospital, University of Chinese Academy of Sciences, Chongqing, China
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12
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Soloyan H, Thornton M, Villani V, Khatchadourian P, Cravedi P, Angeletti A, Grubbs B, De Filippo R, Perin L, Sedrakyan S. Glomerular endothelial cell heterogeneity in Alport syndrome. Sci Rep 2020; 10:11414. [PMID: 32651395 PMCID: PMC7351764 DOI: 10.1038/s41598-020-67588-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2020] [Accepted: 06/09/2020] [Indexed: 11/09/2022] Open
Abstract
Glomerular endothelial cells (GEC) are a crucial component of the glomerular physiology and their damage contributes to the progression of chronic kidney diseases. How GEC affect the pathology of Alport syndrome (AS) however, is unclear. We characterized GEC from wild type (WT) and col4α5 knockout AS mice, a hereditary disorder characterized by progressive renal failure. We used endothelial-specific Tek-tdTomato reporter mice to isolate GEC by FACS and performed transcriptome analysis on them from WT and AS mice, followed by in vitro functional assays and confocal and intravital imaging studies. Biopsies from patients with chronic kidney disease, including AS were compared with our findings in mice. We identified two subpopulations of GEC (dimtdT and brighttdT) based on the fluorescence intensity of the TektdT signal. In AS mice, the brighttdT cell number increased and presented differential expression of endothelial markers compared to WT. RNA-seq analysis revealed differences in the immune and metabolic signaling pathways. In AS mice, dimtdT and brighttdT cells had different expression profiles of matrix-associated genes (Svep1, Itgβ6), metabolic activity (Apom, Pgc1α) and immune modulation (Apelin, Icam1) compared to WT mice. We confirmed a new pro-inflammatory role of Apelin in AS mice and in cultured human GEC. Gene modulations were identified comparable to the biopsies from patients with AS and focal segmental glomerulosclerosis, possibly indicating that the same mechanisms apply to humans. We report the presence of two GEC subpopulations that differ between AS and healthy mice or humans. This finding paves the way to a better understanding of the pathogenic role of GEC in AS progression and could lead to novel therapeutic targets.
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Affiliation(s)
- Hasmik Soloyan
- GOFARR Laboratory for Organ Regenerative Research and Cell Therapeutics in Urology, Division of Urology, The Saban Research Institute, Children's Hospital Los Angeles, University of Southern California, 4661 Sunset Boulevard MS #35, Los Angeles, CA, 90027, USA
| | - Matthew Thornton
- Maternal Fetal Medicine Division, University of Southern California, Los Angeles, USA
| | - Valentina Villani
- GOFARR Laboratory for Organ Regenerative Research and Cell Therapeutics in Urology, Division of Urology, The Saban Research Institute, Children's Hospital Los Angeles, University of Southern California, 4661 Sunset Boulevard MS #35, Los Angeles, CA, 90027, USA
| | - Patrick Khatchadourian
- GOFARR Laboratory for Organ Regenerative Research and Cell Therapeutics in Urology, Division of Urology, The Saban Research Institute, Children's Hospital Los Angeles, University of Southern California, 4661 Sunset Boulevard MS #35, Los Angeles, CA, 90027, USA
| | - Paolo Cravedi
- Division of Nephrology, Department of Medicine, Icahn School of Medicine At Mount Sinai, New York, NY, USA
| | - Andrea Angeletti
- Nephrology Dialysis and Renal Transplantation Unit, S. Orsola University Hospital, Bologna, Italy
| | - Brendan Grubbs
- Maternal Fetal Medicine Division, University of Southern California, Los Angeles, USA
| | - Roger De Filippo
- GOFARR Laboratory for Organ Regenerative Research and Cell Therapeutics in Urology, Division of Urology, The Saban Research Institute, Children's Hospital Los Angeles, University of Southern California, 4661 Sunset Boulevard MS #35, Los Angeles, CA, 90027, USA.,Department of Urology, Keck School of Medicine, University of Southern California, Los Angeles, USA
| | - Laura Perin
- GOFARR Laboratory for Organ Regenerative Research and Cell Therapeutics in Urology, Division of Urology, The Saban Research Institute, Children's Hospital Los Angeles, University of Southern California, 4661 Sunset Boulevard MS #35, Los Angeles, CA, 90027, USA.,Department of Urology, Keck School of Medicine, University of Southern California, Los Angeles, USA
| | - Sargis Sedrakyan
- GOFARR Laboratory for Organ Regenerative Research and Cell Therapeutics in Urology, Division of Urology, The Saban Research Institute, Children's Hospital Los Angeles, University of Southern California, 4661 Sunset Boulevard MS #35, Los Angeles, CA, 90027, USA. .,Department of Urology, Keck School of Medicine, University of Southern California, Los Angeles, USA.
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13
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Loganathan R, Little CD, Rongish BJ. Extracellular matrix dynamics in tubulogenesis. Cell Signal 2020; 72:109619. [PMID: 32247774 DOI: 10.1016/j.cellsig.2020.109619] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2019] [Revised: 03/28/2020] [Accepted: 03/28/2020] [Indexed: 10/24/2022]
Abstract
Biological tubes form in a variety of shapes and sizes. Tubular topology of cells and tissues is a widely recognizable histological feature of multicellular life. Fluid secretion, storage, transport, absorption, exchange, and elimination-processes central to metazoans-hinge on the exquisite tubular architectures of cells, tissues, and organs. In general, the apparent structural and functional complexity of tubular tissues and organs parallels the architectural and biophysical properties of their constitution, i.e., cells and the extracellular matrix (ECM). Together, cellular and ECM dynamics determine the developmental trajectory, topological characteristics, and functional efficacy of biological tubes. In this review of tubulogenesis, we highlight the multifarious roles of ECM dynamics-the less recognized and poorly understood morphogenetic counterpart of cellular dynamics. The ECM is a dynamic, tripartite composite spanning the luminal, abluminal, and interstitial space within the tubulogenic realm. The critical role of ECM dynamics in the determination of shape, size, and function of tubes is evinced by developmental studies across multiple levels-from morphological through molecular-in model tubular organs.
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Affiliation(s)
| | - Charles D Little
- Department of Anatomy and Cell Biology, University of Kansas Medical Center, Kansas City, KS 66160, USA.
| | - Brenda J Rongish
- Department of Anatomy and Cell Biology, University of Kansas Medical Center, Kansas City, KS 66160, USA.
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14
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Wang X, Guo C, Chen Y, Tozzi L, Szymkowiak S, Li C, Kaplan DL. Developing a self-organized tubulogenesis model of human renal proximal tubular epithelial cells in vitro. J Biomed Mater Res A 2019; 108:795-804. [PMID: 31808276 DOI: 10.1002/jbm.a.36858] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Revised: 11/23/2019] [Accepted: 11/27/2019] [Indexed: 12/31/2022]
Abstract
Three-dimensional tissue culture models which recapitulate the phenotype and function of human renal tissue have attracted significant interest as valuable tools for studying kidney development, disease pathophysiology, and nephrotoxicity. Here, a layer-by-layered three-dimensional (3D) co-culture technique was employed to bioengineer an improved human proximal tubule tissue model through incorporating human renal proximal tubule epithelial cells (RPTECs) with two types of interstitial cells on the layered extracellular matrix-like culture matrix. The resulting cultures were characterized by their growth profile, metabolic and proliferative activity, morphological characteristics as well as their functional gene expression. Our results found that the cultures were able to enable the self-organization of RPTECs and promote the tubule-like structure formation in vitro. A well-defined lumen structure and polarized expression of some key protein markers including actin, P-gp, Na+ -K+ -ATPase, and SGLT2 were also observed in the 3D co-cultures. Moreover, compared to the 3D monocultures, the tubule-like structures formed within the 3D co-cultures displayed more significant polarity and enhanced functional gene expression. This suggested the important role played by the renal stromal cells in supporting the tubulogenesis and differentiation of RPTECs. Thus, the 3D co-culture model reported here would benefit bioengineering approaches toward more physiologically relevant proximal tubule tissue in vitro, providing more robust tool not only for better understanding kidney development and pathophysiology but also for drug screening for nephrotoxicity.
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Affiliation(s)
- Xiuli Wang
- Department of Histology & Embryology, College of Basic Medical Science, Dalian Medical University, Dalian, Liaoning, China.,Department of Biomedical Engineering, Tufts University, Medford, Massachusetts
| | - Chengchen Guo
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts
| | - Ying Chen
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts
| | - Lorenzo Tozzi
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts
| | - Sophia Szymkowiak
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts
| | - Chunmei Li
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts
| | - David L Kaplan
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts
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15
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Cruz-Acuña R, Mulero-Russe A, Clark AY, Zent R, García AJ. Identification of matrix physicochemical properties required for renal epithelial cell tubulogenesis by using synthetic hydrogels. J Cell Sci 2019; 132:jcs.226639. [PMID: 31558679 DOI: 10.1242/jcs.226639] [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: 10/17/2018] [Accepted: 09/15/2019] [Indexed: 11/20/2022] Open
Abstract
Synthetic hydrogels with controlled physicochemical matrix properties serve as powerful in vitro tools to dissect cell-extracellular matrix (ECM) interactions that regulate epithelial morphogenesis in 3D microenvironments. In addition, these fully defined matrices overcome the lot-to-lot variability of naturally derived materials and have provided insights into the formation of rudimentary epithelial organs. Therefore, we engineered a fully defined synthetic hydrogel with independent control over proteolytic degradation, mechanical properties, and adhesive ligand type and density to study the impact of ECM properties on epithelial tubulogenesis for inner medullary collecting duct (IMCD) cells. Protease sensitivity of the synthetic material for membrane-type matrix metalloproteinase-1 (MT1-MMP, also known as MMP14) was required for tubulogenesis. Additionally, a defined range of matrix elasticity and presentation of RGD adhesive peptide at a threshold level of 2 mM ligand density were required for epithelial tubulogenesis. Finally, we demonstrated that the engineered hydrogel supported organization of epithelial tubules with a lumen and secreted laminin. This synthetic hydrogel serves as a platform that supports epithelial tubular morphogenetic programs and can be tuned to identify ECM biophysical and biochemical properties required for epithelial tubulogenesis.
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Affiliation(s)
- Ricardo Cruz-Acuña
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA.,Parker H. Petit Institute for Bioengineering and Biosciences, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Adriana Mulero-Russe
- Parker H. Petit Institute for Bioengineering and Biosciences, Georgia Institute of Technology, Atlanta, GA 30332, USA.,School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Amy Y Clark
- Parker H. Petit Institute for Bioengineering and Biosciences, Georgia Institute of Technology, Atlanta, GA 30332, USA.,George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Roy Zent
- Department of Medicine, Vanderbilt University, Nashville, TN 37235, USA
| | - Andrés J García
- Parker H. Petit Institute for Bioengineering and Biosciences, Georgia Institute of Technology, Atlanta, GA 30332, USA .,George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
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16
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Sobreiro-Almeida R, Fonseca DR, Neves NM. Extracellular matrix electrospun membranes for mimicking natural renal filtration barriers. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 103:109866. [DOI: 10.1016/j.msec.2019.109866] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Revised: 06/04/2019] [Accepted: 06/04/2019] [Indexed: 01/06/2023]
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17
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Denisenko O, Mar D, Trawczynski M, Bomsztyk K. Chromatin changes trigger laminin genes dysregulation in aging kidneys. Aging (Albany NY) 2019; 10:1133-1145. [PMID: 29846172 PMCID: PMC5990391 DOI: 10.18632/aging.101453] [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: 02/07/2018] [Accepted: 05/15/2018] [Indexed: 12/13/2022]
Abstract
Dysregulation of gene expression is a hallmark of aging. We examined epigenetic mechanisms that mediate aberrant expression of laminin genes in aging rat kidneys. In old animals, no alterations were found in the levels of abundant laminin mRNAs, whereas Lama3, b3, and c2 transcripts were increased compared to young animals. Lamc2 showed the strongest changes at the mRNA and protein levels. Lamc2 upregulation was transcriptional, as indicated by the elevated RNA polymerase II density at the gene. Furthermore, aging is associated with the loss of H3K27m3 and 5mC silencing modifications at the Lamc2 gene. Western blot analysis revealed no changes in cellular levels of H3K27m3 and cognate enzyme Ezh2 in old kidneys. Thus, the decrease in H3K27m3 at Lamc2 resulted from the re-distribution of this mark among genomic sites. Studies in kidney cells in vitro showed that reducing H3K27m3 density with Ezh2 inhibitor had no effect on Lamc2 expression, suggesting that this modification plays little role in gene upregulation in aging kidney. In contrast, treatment with DNA methylation inhibitor 2'-deoxy-5-azacytidine was sufficient to upregulate Lamc2 gene. We suggest that the loss of 5mC at silenced laminin genes drives their de-repression during aging, contributing to the age-related decline in renal function.
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Affiliation(s)
- Oleg Denisenko
- Department of Medicine, University of Washington, Seattle, WA 98109, USA
| | - Daniel Mar
- Department of Medicine, University of Washington, Seattle, WA 98109, USA
| | | | - Karol Bomsztyk
- Department of Medicine, University of Washington, Seattle, WA 98109, USA
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18
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Zhang J, Li K, Kong F, Sun C, Zhang D, Yu X, Wang X, Li X, Liu T, Shao G, Guan Y, Zhao S. Induced Intermediate Mesoderm Combined with Decellularized Kidney Scaffolds for Functional Engineering Kidney. Tissue Eng Regen Med 2019; 16:501-512. [PMID: 31624705 DOI: 10.1007/s13770-019-00197-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2019] [Revised: 04/17/2019] [Accepted: 05/29/2019] [Indexed: 12/15/2022] Open
Abstract
Background Chronic kidney disease is a severe threat to human health with no ideal treatment strategy. Mature mammalian kidneys have a fixed number of nephrons, and regeneration is difficult once they are damaged. For this reason, developing an efficient approach to achieve kidney regeneration is necessary. The technology of the combination of decellularized kidney scaffolds with stem cells has emerged as a new strategy; however, in previous studies, the differentiation of stem cells in decellularized scaffolds was insufficient for functional kidney regeneration, and many problems remain. Methods We used 0.5% sodium dodecyl sulfate (SDS) to produce rat kidney decellularized scaffolds, and induce adipose-derived stem cells (ADSCs) into intermediate mesoderm by adding Wnt agonist CHIR99021 and FGF9 in vitro. The characteristics of decellularized scaffolds and intermediate mesoderm induced from adipose-derived stem cells were identified. The scaffolds were recellularized with ADSCs and intermediate mesoderm cells through the renal artery and ureter. After cocultured for 10 days, cells adhesion and differentiation was evaluated. Results Intermediate mesoderm cells were successfully induced from ADSCs and identified by immunofluorescence and Western blotting assays (OSR1 + , PAX2 +). Immunofluorescence showed that intermediate mesoderm cells differentiated into tubular-like (E-CAD + , GATA3 +) and podocyte-like (WT1 +) cells with higher differentiation efficiency than ADSCs in the decellularized scaffolds. Comparatively, this phenomenon was not observed in induced intermediate mesoderm cells cultured in vitro. Conclusion In this study, we demonstrated that intermediate mesoderm cells could be induced from ADSCs and that they could differentiate well after cocultured with decellularized scaffolds.
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Affiliation(s)
- Jianye Zhang
- 1Department of Urology, The Second Hospital, Shandong University, 247 Beiyuan Street, Jinan, 250033 Shandong People's Republic of China
| | - Kailin Li
- 2Department of Central Research Lab, The Second Hospital, Shandong University, 247 Beiyuan Street, Jinan, 250033 Shandong People's Republic of China
| | - Feng Kong
- 2Department of Central Research Lab, The Second Hospital, Shandong University, 247 Beiyuan Street, Jinan, 250033 Shandong People's Republic of China.,Key Laboratory for Kidney Regeneration of Shandong Province, 247 Beiyuan Street, Jinan, 250033 Shandong People's Republic of China.,4Shandong University- Karolinska Institutet Collaborative Laboratory for Stem Cell Research, 247 Beiyuan Street, Jinan, 250033 Shandong People's Republic of China
| | - Chao Sun
- 2Department of Central Research Lab, The Second Hospital, Shandong University, 247 Beiyuan Street, Jinan, 250033 Shandong People's Republic of China
| | - Denglu Zhang
- 5The Affiliated Hospital of Shandong University of Traditional Chinese Medicine, 16369 Jingshi Road, Jinan, 250011 Shandong People's Republic of China
| | - Xin Yu
- 1Department of Urology, The Second Hospital, Shandong University, 247 Beiyuan Street, Jinan, 250033 Shandong People's Republic of China
| | - Xuesheng Wang
- 1Department of Urology, The Second Hospital, Shandong University, 247 Beiyuan Street, Jinan, 250033 Shandong People's Republic of China
| | - Xian Li
- 6The Second Hospital of Shandong University, 247 Beiyuan Street, Jinan, 250033 Shandong People's Republic of China
| | - Tongyan Liu
- 6The Second Hospital of Shandong University, 247 Beiyuan Street, Jinan, 250033 Shandong People's Republic of China
| | - Guangfeng Shao
- 1Department of Urology, The Second Hospital, Shandong University, 247 Beiyuan Street, Jinan, 250033 Shandong People's Republic of China
| | - Yong Guan
- 1Department of Urology, The Second Hospital, Shandong University, 247 Beiyuan Street, Jinan, 250033 Shandong People's Republic of China.,7Shandong Provincial Hospital of Shandong University, 324 Jingwuweiqi Road, Jinan, 250021 Shandong People's Republic of China
| | - Shengtian Zhao
- 1Department of Urology, The Second Hospital, Shandong University, 247 Beiyuan Street, Jinan, 250033 Shandong People's Republic of China.,Key Laboratory for Kidney Regeneration of Shandong Province, 247 Beiyuan Street, Jinan, 250033 Shandong People's Republic of China.,4Shandong University- Karolinska Institutet Collaborative Laboratory for Stem Cell Research, 247 Beiyuan Street, Jinan, 250033 Shandong People's Republic of China.,7Shandong Provincial Hospital of Shandong University, 324 Jingwuweiqi Road, Jinan, 250021 Shandong People's Republic of China
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19
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Ali M, PR AK, Yoo JJ, Zahran F, Atala A, Lee SJ. A Photo-Crosslinkable Kidney ECM-Derived Bioink Accelerates Renal Tissue Formation. Adv Healthc Mater 2019; 8:e1800992. [PMID: 30725520 DOI: 10.1002/adhm.201800992] [Citation(s) in RCA: 130] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2018] [Revised: 01/20/2019] [Indexed: 11/10/2022]
Abstract
3D bioprinting strategies in tissue engineering aim to fabricate clinically applicable tissue constructs that can replace the damaged or diseased tissues and organs. One of the main prerequisites in 3D bioprinting is finding an appropriate bioink that provides a tissue-specific microenvironment supporting the cellular growth and maturation. In this respect, decellularized extracellular matrix (dECM)-derived hydrogels have been considered as bioinks for the cell-based bioprinting due to their capability to inherit the intrinsic cues from native ECM. Herein, a photo-crosslinkable kidney ECM-derived bioink (KdECMMA) is developed that could provide a kidney-specific microenvironment for renal tissue bioprinting. Porcine whole kidneys are decellularized through a perfusion method, dissolved in an acid solution, and chemically modified by methacrylation. A KdECMMA-based bioink is formulated and evaluated for rheological properties and printability for the printing process. The results show that the bioprinted human kidney cells in the KdECMMA bioink are highly viable and mature with time. Moreover, the bioprinted renal constructs exhibit the structural and functional characteristics of the native renal tissue. The potential of the tissue-specific ECM-derived bioink is demonstrated for cell-based bioprinting that could enhance the cellular maturation and eventually tissue formation.
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Affiliation(s)
- Mohamed Ali
- Wake Forest Institute for Regenerative MedicineWake Forest School of MedicineMedical Center Boulevard Winston‐Salem NC 27157 USA
- Department of ChemistryFaculty of ScienceZagazig University Zagazig Sharkia 44519 Egypt
| | - Anil Kumar PR
- Wake Forest Institute for Regenerative MedicineWake Forest School of MedicineMedical Center Boulevard Winston‐Salem NC 27157 USA
| | - James J. Yoo
- Wake Forest Institute for Regenerative MedicineWake Forest School of MedicineMedical Center Boulevard Winston‐Salem NC 27157 USA
- School of Biomedical Engineering and SciencesWake Forest University‐Virginia Tech Winston‐Salem NC 27157 USA
| | - Faten Zahran
- Department of ChemistryFaculty of ScienceZagazig University Zagazig Sharkia 44519 Egypt
| | - Anthony Atala
- Wake Forest Institute for Regenerative MedicineWake Forest School of MedicineMedical Center Boulevard Winston‐Salem NC 27157 USA
- School of Biomedical Engineering and SciencesWake Forest University‐Virginia Tech Winston‐Salem NC 27157 USA
| | - Sang Jin Lee
- Wake Forest Institute for Regenerative MedicineWake Forest School of MedicineMedical Center Boulevard Winston‐Salem NC 27157 USA
- School of Biomedical Engineering and SciencesWake Forest University‐Virginia Tech Winston‐Salem NC 27157 USA
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20
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Hiraki HL, Nagao RJ, Himmelfarb J, Zheng Y. Fabricating a Kidney Cortex Extracellular Matrix-Derived Hydrogel. J Vis Exp 2018:58314. [PMID: 30371659 PMCID: PMC6235530 DOI: 10.3791/58314] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Extracellular matrix (ECM) provides important biophysical and biochemical cues to maintain tissue homeostasis. Current synthetic hydrogels offer robust mechanical support for in vitro cell culture but lack the necessary protein and ligand composition to elicit physiological behavior from cells. This manuscript describes a fabrication method for a kidney cortex ECM-derived hydrogel with proper mechanical robustness and supportive biochemical composition. The hydrogel is fabricated by mechanically homogenizing and solubilizing decellularized human kidney cortex ECM. The matrix preserves native kidney cortex ECM protein ratios while also enabling gelation to physiological mechanical stiffnesses. The hydrogel serves as a substrate upon which kidney cortex-derived cells can be maintained under physiological conditions. Furthermore, the hydrogel composition can be manipulated to model a diseased environment which enables the future study of kidney diseases.
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Affiliation(s)
| | - Ryan J Nagao
- Department of Bioengineering, Center for Cardiovascular Biology, Institute for Stem Cell and Regenerative Medicine, University of Washington
| | - Jonathan Himmelfarb
- Department of Medicine, Kidney Research Institute, University of Washington;
| | - Ying Zheng
- Department of Bioengineering, Center for Cardiovascular Biology, Institute for Stem Cell and Regenerative Medicine, University of Washington;
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21
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Mei J, Yu Y, Li M, Xi S, Zhang S, Liu X, Jiang J, Wang Z, Zhang J, Ding Y, Lou X, Tang M. The angiogenesis in decellularized scaffold-mediated the renal regeneration. Oncotarget 2017; 7:27085-93. [PMID: 27058889 PMCID: PMC5053634 DOI: 10.18632/oncotarget.7785] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2015] [Accepted: 01/29/2016] [Indexed: 11/25/2022] Open
Abstract
There are increasing numbers of patients underwent partial nephrectomy, and recovery of disturbed renal function is imperative post partial nephrectomy. We previously have demonstrated the decellularized (DC) scaffolds could mediate the residual kidney regeneration and thus improve disturbed renal function after partial nephrectomy. However, the cellular changes including the angiogenesis in the implanted DC scaffold has not yet been elaborated. In this study, we observed that the scaffold promoted the proliferation of human umbilical vein endothelial cells (HUVEC) that adhered to the DC scaffold in vitro. We next examined the pathological changes of the implanted DC graft in vivo, and found a decreased volume of the scaffold and a dramatic angiogenesis within the scaffold. The average microvessel density (aMVD) increased at the early stage, while decreased at the later stage post transplantation. Expression level of vascular endothelial growth factor (VEGF) showed similar dynamic changes. In addition, many endothelial cells (ECs) and endothelial progenitor cells (EPCs) were distributed in the region which contained active angiogenesis in the scaffold. However, the implanted graft became fibrosis and the angiogenesis degraded at final stage roughly 8 weeks post transplantation. Our data indicate that DC scaffold can be vascularized in vivo and possible mechanisms are discussed.
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Affiliation(s)
- Jin Mei
- Anatomy Department, Wenzhou Medical University, Wenzhou, 325035, China.,Institute of Bioscaffold Transplantation and Immunology, Wenzhou Medical University, Wenzhou, 325035, China.,Institute of Neuroscience, Wenzhou Medical University, Wenzhou, 325035, China
| | - Yaling Yu
- Anatomy Department, Wenzhou Medical University, Wenzhou, 325035, China.,Institute of Bioscaffold Transplantation and Immunology, Wenzhou Medical University, Wenzhou, 325035, China
| | - Miaozhong Li
- Medical School of Ningbo University, Ningbo, 315211, China
| | - Shanshan Xi
- Anatomy Department, Wenzhou Medical University, Wenzhou, 325035, China.,Institute of Bioscaffold Transplantation and Immunology, Wenzhou Medical University, Wenzhou, 325035, China
| | - Sixiao Zhang
- Medical School of Ningbo University, Ningbo, 315211, China
| | - Xiaolin Liu
- Anatomy Department, Wenzhou Medical University, Wenzhou, 325035, China.,Institute of Bioscaffold Transplantation and Immunology, Wenzhou Medical University, Wenzhou, 325035, China
| | - Junqun Jiang
- Anatomy Department, Wenzhou Medical University, Wenzhou, 325035, China.,Institute of Bioscaffold Transplantation and Immunology, Wenzhou Medical University, Wenzhou, 325035, China
| | - Zhibin Wang
- Institute of Bioscaffold Transplantation and Immunology, Wenzhou Medical University, Wenzhou, 325035, China
| | - Jianse Zhang
- Anatomy Department, Wenzhou Medical University, Wenzhou, 325035, China.,Institute of Bioscaffold Transplantation and Immunology, Wenzhou Medical University, Wenzhou, 325035, China
| | - Yuqiang Ding
- Institute of Neuroscience, Wenzhou Medical University, Wenzhou, 325035, China
| | - Xinfa Lou
- Institute of Bioscaffold Transplantation and Immunology, Wenzhou Medical University, Wenzhou, 325035, China
| | - Maolin Tang
- Anatomy Department, Wenzhou Medical University, Wenzhou, 325035, China.,Institute of Bioscaffold Transplantation and Immunology, Wenzhou Medical University, Wenzhou, 325035, China
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22
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Magno V, Friedrichs J, Weber HM, Prewitz MC, Tsurkan MV, Werner C. Macromolecular crowding for tailoring tissue-derived fibrillated matrices. Acta Biomater 2017; 55:109-119. [PMID: 28433789 DOI: 10.1016/j.actbio.2017.04.018] [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: 01/23/2017] [Revised: 03/21/2017] [Accepted: 04/18/2017] [Indexed: 10/19/2022]
Abstract
Tissue-derived fibrillated matrices can be instrumental for the in vitro reconstitution of multiphasic extracellular microenvironments. However, despite of several advantages, the obtained scaffolds so far offer a rather narrow range of materials characteristics only. In this work, we demonstrate how macromolecular crowding (MMC) - the supplementation of matrix reconstitution media with synthetic or natural macromolecules in ways to create excluded volume effects (EVE) - can be employed for tailoring important structural and biophysical characteristics of kidney-derived fibrillated matrices. Porcine kidneys were decellularized, ground and the obtained extracellular matrix (ECM) preparations were reconstituted under varied MMC conditions. We show that MMC strongly influences the fibrillogenesis kinetics and impacts the architecture and the elastic modulus of the reconstituted matrices, with diameters and relative alignment of fibrils increasing at elevated concentrations of the crowding agent Ficoll400, a nonionic synthetic polymer of sucrose. Furthermore, we demonstrate how MMC modulates the distribution of key ECM molecules within the reconstituted matrix scaffolds. As a proof of concept, we compared different variants of kidney-derived fibrillated matrices in cell culture experiments referring to specific requirements of kidney tissue engineering approaches. The results revealed that MMC-tailored matrices support the morphogenesis of human umbilical vein endothelial cells (HUVECs) into capillary networks and of murine kidney stem cells (KSCs) into highly branched aggregates. The established methodology is concluded to provide generally applicable new options for tailoring tissue-specific multiphasic matrices in vitro. STATEMENT OF SIGNIFICANCE Tissue-derived fibrillated matrices can be instrumental for the in vitro reconstitution of multiphasic extracellular microenvironments. However, despite of several advantages, the obtained scaffolds so far offer a rather narrow range of materials characteristics only. Using the kidney matrix as a model, we herein report a new approach for tailoring tissue-derived fibrillated matrices by means of macromolecular crowding (MMC), the supplementation of reconstitution media with synthetic or natural macromolecules. MMC-modulation of matrix reconstitution is demonstrated to allow for the adjustment of fibrillation kinetics and nano-architecture, fiber diameter, alignment, and matrix elasticity. Primary human umbilical vein endothelial cells (HUVEC) and murine kidney stem cells (KSC) were cultured within different variants of fibrillated kidney matrix scaffolds. The results showed that MMC-tailored matrices were superior in supporting desired morphogenesis phenomena of both cell types.
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23
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Abstract
The Xenopus genus includes several members of aquatic frogs native to Africa but is perhaps best known for the species Xenopus laevis and Xenopus tropicalis. These species were popularized as model organisms from as early as the 1800s and have been instrumental in expanding several biological fields including cell biology, environmental toxicology, regenerative biology, and developmental biology. In fact, much of what we know about the formation and maturation of the vertebrate renal system has been acquired by examining the intricate genetic and morphological patterns that epitomize nephrogenesis in Xenopus. From these numerous reports, we have learned that the process of kidney development is as unique among organs as it is conserved among vertebrates. While development of most organs involves increases in size at a single location, development of the kidney occurs through a series of three increasingly complex nephric structures that are temporally distinct from one another and which occupy discrete spatial locales within the body. These three renal systems all serve to provide homeostatic, osmoregulatory, and excretory functions in animals. Importantly, the kidneys in amphibians, such as Xenopus, are less complex and more easily accessed than those in mammals, and thus tadpoles and frogs provide useful models for understanding our own kidney development. Several descriptive and mechanistic studies conducted with the Xenopus model system have allowed us to elucidate the cellular and molecular mediators of renal patterning and have also laid the foundation for our current understanding of kidney repair mechanisms in vertebrates. While some species-specific responses to renal injury have been observed, we still recognize the advantage of the Xenopus system due to its distinctive similarity to mammalian wound healing, reparative, and regenerative responses. In addition, the first evidence of renal regeneration in an amphibian system was recently demonstrated in Xenopus laevis. As genetic and molecular tools continue to advance, our appreciation for and utilization of this amphibian model organism can only intensify and will certainly provide ample opportunities to further our understanding of renal development and repair.
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24
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Sánchez-Romero N, Schophuizen CM, Giménez I, Masereeuw R. In vitro systems to study nephropharmacology: 2D versus 3D models. Eur J Pharmacol 2016; 790:36-45. [DOI: 10.1016/j.ejphar.2016.07.010] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2016] [Revised: 06/24/2016] [Accepted: 07/06/2016] [Indexed: 12/20/2022]
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25
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Nagao RJ, Xu J, Luo P, Xue J, Wang Y, Kotha S, Zeng W, Fu X, Himmelfarb J, Zheng Y. Decellularized Human Kidney Cortex Hydrogels Enhance Kidney Microvascular Endothelial Cell Maturation and Quiescence. Tissue Eng Part A 2016; 22:1140-1150. [PMID: 27481445 DOI: 10.1089/ten.tea.2016.0213] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
The kidney peritubular microvasculature is highly susceptible to injury from drugs and toxins, often resulting in acute kidney injury and progressive chronic kidney disease. Little is known about the process of injury and regeneration of human kidney microvasculature, resulting from the lack of appropriate kidney microvascular models that can incorporate the proper cells, extracellular matrices (ECMs), and architectures needed to understand the response and contribution of individual vascular components in these processes. In this study, we present methods to recreate the human kidney ECM (kECM) microenvironment by fabricating kECM hydrogels derived from decellularized human kidney cortex. The majority of native matrix proteins, such as collagen-IV, laminin, and heparan sulfate proteoglycan, and their isoforms were preserved in similar proportions as found in normal kidneys. Human kidney peritubular microvascular endothelial cells (HKMECs) became more quiescent when cultured on this kECM gel compared with culture on collagen-I-assessed using phenotypic, genotypic, and functional assays; whereas human umbilical vein endothelial cells became stimulated on kECM gels. We demonstrate for the first time that human kidney cortex can form a hydrogel suitable for use in flow-directed microphysiological systems. Our findings strongly suggest that selecting the proper ECM is a critical consideration in the development of vascularized organs on a chip and carries important implications for tissue engineering of all vascularized organs.
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Affiliation(s)
- Ryan J Nagao
- 1 Department of Bioengineering, University of Washington , Seattle, Washington.,2 Department of Medicine, University of Washington , Seattle, Washington
| | - Jin Xu
- 1 Department of Bioengineering, University of Washington , Seattle, Washington
| | - Ping Luo
- 1 Department of Bioengineering, University of Washington , Seattle, Washington
| | - Jun Xue
- 1 Department of Bioengineering, University of Washington , Seattle, Washington
| | - Yi Wang
- 3 Bloodworks Northwest Research Institute , Seattle, Washington
| | - Surya Kotha
- 1 Department of Bioengineering, University of Washington , Seattle, Washington
| | - Wen Zeng
- 1 Department of Bioengineering, University of Washington , Seattle, Washington.,4 Department of Anatomy, Key Lab of Biomechanics, Third Military Medical University , Chongqing, China
| | - Xiaoyun Fu
- 3 Bloodworks Northwest Research Institute , Seattle, Washington
| | - Jonathan Himmelfarb
- 2 Department of Medicine, University of Washington , Seattle, Washington.,5 Kidney Research Institute, University of Washington , Seattle, Washington
| | - Ying Zheng
- 1 Department of Bioengineering, University of Washington , Seattle, Washington.,5 Kidney Research Institute, University of Washington , Seattle, Washington.,6 Institute for Stem Cell and Regenerative Medicine, University of Washington , Seattle, Washington
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26
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Manson SR, Austin PF, Guo Q, Moore KH. BMP-7 Signaling and its Critical Roles in Kidney Development, the Responses to Renal Injury, and Chronic Kidney Disease. VITAMINS AND HORMONES 2016; 99:91-144. [PMID: 26279374 DOI: 10.1016/bs.vh.2015.05.003] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Chronic kidney disease (CKD) is a significant health problem that most commonly results from congenital abnormalities in children and chronic renal injury in adults. The therapeutic potential of BMP-7 was first recognized nearly two decades ago with studies demonstrating its requirement for kidney development and ability to inhibit the pathogenesis of renal injury in models of CKD. Since this time, our understanding of CKD has advanced considerably and treatment strategies have evolved with the identification of many additional signaling pathways, cell types, and pathologic processes that contribute to disease progression. The purpose of this review is to revisit the seminal studies that initially established the importance of BMP-7, highlight recent advances in BMP-7 research, and then integrate this knowledge with current research paradigms. We will provide an overview of the evolutionarily conserved roles of BMP proteins and the features that allow BMP signaling pathways to function as critical signaling nodes for controlling biological processes, including those related to CKD. We will discuss the multifaceted functions of BMP-7 during kidney development and the potential for alterations in BMP-7 signaling to result in congenital abnormalities and pediatric kidney disease. We will summarize the renal protective effects of recombinant BMP-7 in experimental models of CKD and then propose a model to describe the potential physiological role of endogenous BMP-7 in the innate repair mechanisms of the kidneys that respond to renal injury. Finally, we will highlight emerging clinical approaches for applying our knowledge of BMP-7 toward improving the treatment of patients with CKD.
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Affiliation(s)
- Scott R Manson
- Department of Surgery, Division of Urology, Washington University School of Medicine, St. Louis Children's Hospital, St. Louis, Missouri, USA.
| | - Paul F Austin
- Department of Surgery, Division of Urology, Washington University School of Medicine, St. Louis Children's Hospital, St. Louis, Missouri, USA
| | - Qiusha Guo
- Department of Surgery, Division of Urology, Washington University School of Medicine, St. Louis Children's Hospital, St. Louis, Missouri, USA
| | - Katelynn H Moore
- Department of Surgery, Division of Urology, Washington University School of Medicine, St. Louis Children's Hospital, St. Louis, Missouri, USA
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Current Bioengineering Methods for Whole Kidney Regeneration. Stem Cells Int 2015; 2015:724047. [PMID: 26089921 PMCID: PMC4452081 DOI: 10.1155/2015/724047] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2014] [Revised: 01/13/2015] [Accepted: 01/13/2015] [Indexed: 02/07/2023] Open
Abstract
Kidney regeneration is likely to provide an inexhaustible source of tissues and organs for immunosuppression-free transplantation. It is currently garnering considerable attention and might replace kidney dialysis as the ultimate therapeutic strategy for renal failure. However, anatomical complications make kidney regeneration difficult. Here, we review recent advances in the field of kidney regeneration, including (i) the directed differentiation of induced pluripotent stem cells/embryonic stem cells into kidney cells; (ii) blastocyst decomplementation; (iii) use of a decellularized cadaveric scaffold; (iv) embryonic organ transplantation; and (v) use of a nephrogenic niche for growing xenoembryos for de novo kidney regeneration from stem cells. All these approaches represent potentially promising therapeutic strategies for the treatment of patients with chronic kidney disease. Although many obstacles to kidney regeneration remain, we hope that innovative strategies and reliable research will ultimately allow the restoration of renal function in patients with end-stage kidney disease.
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Finesilver G, Kahana M, Mitrani E. Kidney-Specific Microscaffolds and Kidney-Derived Serum-Free Conditioned Media Support In Vitro Expansion, Differentiation, and Organization of Human Embryonic Stem Cells. Tissue Eng Part C Methods 2014; 20:1003-15. [DOI: 10.1089/ten.tec.2013.0574] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Affiliation(s)
- Gershon Finesilver
- Institute of Life Sciences, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Meygal Kahana
- Institute of Life Sciences, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Eduardo Mitrani
- Institute of Life Sciences, The Hebrew University of Jerusalem, Jerusalem, Israel
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29
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Yim HE, Yoo KH, Bae IS, Hong YS, Lee JW. Differential modification of enalapril in the kidneys of lean and 'programmed' obese male young rats. Obes Res Clin Pract 2014; 9:281-92. [PMID: 25262233 DOI: 10.1016/j.orcp.2014.09.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/08/2014] [Revised: 08/21/2014] [Accepted: 09/02/2014] [Indexed: 01/03/2023]
Abstract
OBJECTIVE We investigated whether enalapril treatment could have beneficial effects on nutritionally-programmed renal changes in postnatally overfed young rats. METHODS Three or 10 male pups per mother were assigned to either the Obese or Lean groups during the first 21 days of life. These pups were treated with enalapril (Obese enalapril, OE; Lean enalapril, LE) or vehicle (Obese control, OC; Lean control, LC) between 15 and 28 days. All pups had their kidneys examined at 29 days. RESULTS OC pups weighed more than those in the LC group between 7 and 28 days of age (P<0.05). Enalapril reduced body weights in rats from both the Obese and Lean groups between 22 and 28 days (P<0.05). Renal cell proliferation and apoptosis, glomerulosclerosis, and tubulointerstitial fibrosis were all increased by enalapril (P<0.05). Among the groups, renal cell apoptosis and serum creatinine were the highest in OE pups (P<0.05). Enalapril treatment resulted in contrasting molecular expression profiles involved in renal maturation and repair in the kidneys of the rats from the Lean and Obese groups. CONCLUSION Enalapril can differentially modulate renal molecular alterations in lean and postnatally overfed rats and may be not beneficial in obese young male rats.
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Affiliation(s)
- Hyung Eun Yim
- Department of Pediatrics, College of Medicine, Korea University, Seoul, Republic of Korea
| | - Kee Hwan Yoo
- Department of Pediatrics, College of Medicine, Korea University, Seoul, Republic of Korea.
| | - In Sun Bae
- Department of Pediatrics, College of Medicine, Korea University, Seoul, Republic of Korea
| | - Young Sook Hong
- Department of Pediatrics, College of Medicine, Korea University, Seoul, Republic of Korea
| | - Joo Won Lee
- Department of Pediatrics, College of Medicine, Korea University, Seoul, Republic of Korea
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A self-avoidance mechanism in patterning of the urinary collecting duct tree. BMC DEVELOPMENTAL BIOLOGY 2014; 14:35. [PMID: 25205115 PMCID: PMC4448276 DOI: 10.1186/s12861-014-0035-8] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/17/2014] [Accepted: 07/24/2014] [Indexed: 11/10/2022]
Abstract
Background Glandular organs require the development of a correctly patterned epithelial tree. These arise by iterative branching: early branches have a stereotyped anatomy, while subsequent branching is more flexible, branches spacing out to avoid entanglement. Previous studies have suggested different genetic programs are responsible for these two classes of branches. Results Here, working with the urinary collecting duct tree of mouse kidneys, we show that the transition from the initial, stereotyped, wide branching to narrower later branching is independent from previous branching events but depends instead on the proximity of other branch tips. A simple computer model suggests that a repelling molecule secreted by branches can in principle generate a well-spaced tree that switches automatically from wide initial branch angles to narrower subsequent ones, and that co-cultured trees would distort their normal shapes rather than colliding. We confirm this collision-avoidance experimentally using organ cultures, and identify BMP7 as the repelling molecule. Conclusions We propose that self-avoidance, an intrinsically error-correcting mechanism, may be an important patterning mechanism in collecting duct branching, operating along with already-known mesenchyme-derived paracrine factors.
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Salvatori M, Peloso A, Katari R, Orlando G. Regeneration and bioengineering of the kidney: current status and future challenges. Curr Urol Rep 2014; 15:379. [PMID: 24375058 DOI: 10.1007/s11934-013-0379-9] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The prevalence of chronic kidney disease continues to outpace the development of effective treatment strategies. For patients with advanced disease, renal replacement therapies approximate the filtration functions of the kidney at considerable cost and inconvenience, while failing to restore the resorptive and endocrine functions. Allogeneic transplantation remains the only restorative treatment, but donor shortage, surgical morbidity and the need for lifelong immunosuppression significantly limit clinical application. Emerging technologies in the fields of regenerative medicine and tissue engineering strive to address these limitations. We review recent advances in cell-based therapies, primordial allografts, bio-artificial organs and whole-organ bioengineering as they apply to renal regeneration. Collaborative efforts across these fields aim to produce a bioengineered kidney capable of restoring renal function in patients with end-stage disease.
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Burgkart R, Tron A, Prodinger P, Culmes M, Tuebel J, van Griensven M, Saldamli B, Schmitt A. Decellularized kidney matrix for perfused bone engineering. Tissue Eng Part C Methods 2014; 20:553-61. [PMID: 24164381 DOI: 10.1089/ten.tec.2013.0270] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
The vascularization of tissue-engineered constructs is yet an unsolved problem. Here, recent work on the decellularization of whole organs has opened new perspectives on tissue engineering. However, existing decellularization protocols last several days and derived biomatrices have only been reseeded with cells from the same tissue origin or stem cells differentiating into these types of tissue. Within the present work, we demonstrate a novel standardized, time-efficient, and reproducible protocol for the decellularization of solid tissues to derive a ready to use biomatrix within only 5 h. Furthermore, we prove that biomatrices are usable as potential scaffolds for tissue engineering of vascularized tissues, even beyond tissue and maybe even species barriers. To prove this, we seeded human primary osteoblasts into a rat kidney bioscaffold. Here, seeded cells spread homogeneously within the matrix and proliferate under dynamic culture conditions. The cells do not only maintain their original phenotype within the matrix, they also show a strong metabolic activity and remodel the biomatrix toward a bone-like extracellular matrix. Thus, the decellularization technique has the ability to become a platform technology for tissue engineering. It potentially offers a universally applicable and easily producible scaffold that addresses the yet unsolved problem of vascularization.
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Affiliation(s)
- Rainer Burgkart
- 1 Department of Orthopedics, "Klinikum rechts der Isar," Technical University Munich , Munich, Germany
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A human integrin-α3 mutation confers major renal developmental defects. PLoS One 2014; 9:e90879. [PMID: 24621570 PMCID: PMC3951280 DOI: 10.1371/journal.pone.0090879] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2013] [Accepted: 02/04/2014] [Indexed: 12/17/2022] Open
Abstract
The development of the mammalian kidney is a highly complex process dependent upon the interplay of various cell types, secreted morphogens, and the extra-cellular matrix (ECM). Although integrins are the most important receptors for ECM proteins and are ubiquitously expressed during kidney development, mice lacking expression of integrin α3 (Itga3) do not demonstrate a reduced number of nephrons, but mostly a disorganized GBM (glomerular basement membrane) leading to proteinuria. Thus, ITGA3 is considered mostly a passive GBM stabilizer and not an active player in nephrogenesis. Recently, mutations in the human ITGA3 were shown to cause congenital nephrotic syndrome, epidermolysis bullosa and interstitial lung disease, otherwise termed NEP syndrome (Nephrotic syndrome, Epidermolysis bullosa and Pulmonary disease). Herein, we performed histological and molecular analysis on the kidneys of a single patient from the initial cohort harboring an ITGA3 mutation, to illuminate the role of ITGA3 in human renal development. We show the patient to harbor a unique phenotype at birth, including severe unilateral renal hypodysplasia. Interrogation of global gene expression in the hypodysplastic kidney versus three controls (fetal, child and adult kidneys) revealed perturbed expression in several renal developmental pathways implicated in hypodysplasia, including the Wnt, BMP (bone morphogenetic protein) and TGF (transforming growth factor) pathways. Moreover, the affected kidney showed upregulation of early embryonic genes (e.g. OCT4 and PAX8) concomitant with downregulated kidney differentiation markers, implying a defect in proper renal differentiation. In conclusion, we show for the first time that ITGA3 is not merely a passive anchor for renal ECM proteins, as predicted by mouse models. Instead, our results may suggest it plays a central role in the interplay of cells, morphogens and ECM, required for proper nephrogenesis, thus adding ITGA3 to the list of CAKUT (congenital anomalies of the kidney and urinary tract)-causing genes.
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Du X, Shimizu A, Masuda Y, Kuwahara N, Arai T, Kataoka M, Uchiyama M, Kaneko T, Akimoto T, Iino Y, Fukuda Y. Involvement of matrix metalloproteinase-2 in the development of renal interstitial fibrosis in mouse obstructive nephropathy. J Transl Med 2012; 92:1149-60. [PMID: 22614125 DOI: 10.1038/labinvest.2012.68] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Renal fibrosis is a common finding in progressive renal diseases. Matrix metalloproteinases (MMPs) are involved in epithelial-to-mesenchymal transition (EMT). We investigated the role of MMP-2 and the effect of inhibition of MMPs on the development of renal fibrosis. Renal fibrosis was induced in MMP-2 wild-type (MMP-2⁺/⁺) mice by unilateral ureteral obstruction (UUO). Renal histopathology, EMT-associated molecules, and activity of MMP-2 and MMP-9 were examined during the development of interstitial fibrosis. UUO-renal fibrosis was also induced in MMP-2 deficient (MMP-2⁻/⁻) and MMP-2⁺/⁺ mice treated with minocycline (inhibitor of MMPs). In MMP-2⁺/⁺ mice, MMP-2 and MMP-9 were expressed in damaged tubules, and their activities increased in a time-dependent manner after UUO. Interstitial fibrosis was noted at day 14, with deposition of types III and I collagens and expression of markers of mesenchymal cells (S100A4, vimentin, α-smooth muscle actin, and heat shock protein-47) in damaged tubular epithelial cells, together with F4/80+ macrophage infiltration. Fibrotic kidneys expressed EMT-associated molecules (ILK, TGF-β1, Smad, Wnt, β-catenin, and Snail). In contrast, the kidneys of MMP-2⁻/⁻ mice and minocycline-treated MMP-2⁺/⁺ mice showed amelioration of renal fibrosis with reduced expression of markers of mesenchymal cells in tubular epithelial cells, inhibition of upregulated EMT-associated molecules, and suppression of macrophage infiltration. The results suggested that MMP-2 have a pathogenic role in renal interstitial fibrosis, possibly through the induction of EMT and macrophage infiltration. Inhibition of MMPs may be beneficial therapeutically in renal fibrosis.
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Affiliation(s)
- Xuanyi Du
- Department of Pathology-Analytic Human Pathology, Nippon Medical School, Tokyo, Japan
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Ross EA, Abrahamson DR, St John P, Clapp WL, Williams MJ, Terada N, Hamazaki T, Ellison GW, Batich CD. Mouse stem cells seeded into decellularized rat kidney scaffolds endothelialize and remodel basement membranes. Organogenesis 2012; 8:49-55. [PMID: 22692231 DOI: 10.4161/org.20209] [Citation(s) in RCA: 98] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
INTRODUCTION To address transplant organ shortage, a promising strategy is to decellularize kidneys in a manner that the scaffold retains signals for seeded pluripotent precursor cells to differentiate and recapitulate native structures: matrix-to-cell signaling followed by cell-cell and cell-matrix interactions, thereby remodeling and replacing the original matrix. This would reduce scaffold antigenicity and enable xeno-allografts. RESULTS DAPI-labeled cells in arterial vessels and glomeruli were positive for both endothelial lineage markers, BsLB4 and VEGFR2. Rat scaffold's basement membrane demonstrated immunolabeling with anti-mouse laminin β1. Labeling intensified over time with 14 day incubations. CONCLUSION We provide new evidence for matrix-to-cell signaling in acellular whole organ scaffolds that induces differentiation of pluripotent precursor cells to endothelial lineage. Production of mouse basement membrane supports remodeling of host (rat)-derived scaffolds and thereby warrants further investigation as a promising approach for xenotransplantation. METHODS We previously showed that murine embryonic stem cells arterially seeded into acellular rat whole kidney scaffolds multiply and demonstrate morphologic, immunohistochemical and gene expression evidence for differentiation. Vascular cell endothelialization was now further tested by endothelial specific BsLB4 lectin and anti-VEGFR2 (Flk1) antibodies. Remodeling of the matrix basement membranes from rat to mouse ("murinization") was assessed by a monoclonal antibody specific for mouse laminin β1 chain.
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Affiliation(s)
- Edward A Ross
- Division of Nephrology, Hypertension and Renal Transplantation; University of Florida, Gainesville, FL USA.
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Zhang X, Bush KT, Nigam SK. In vitro culture of embryonic kidney rudiments and isolated ureteric buds. Methods Mol Biol 2012; 886:13-21. [PMID: 22639247 DOI: 10.1007/978-1-61779-851-1_2] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
In vitro culture of embryonic kidney rudiments has been utilized to study a variety of cellular processes and developmental mechanisms. Here, we describe two-dimensional (2D) culture of embryonic kidney rudiments on Transwell filters and three-dimensional (3D) cultures in collagen gels in detail, and 3D culture of isolated ureteric bud (UB) in Matrigel with BSN-conditioned media.
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Affiliation(s)
- Xing Zhang
- Pediatrics Department, University of California, San Diego, CA, USA
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Amann K, Haas CS, Schüssler J, Daniel C, Hartner A, Schöcklmann HO. Beneficial effects of integrin αvβ3-blocking RGD peptides in early but not late phase of experimental glomerulonephritis. Nephrol Dial Transplant 2011; 27:1755-68. [PMID: 22049183 DOI: 10.1093/ndt/gfr603] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Integrin αvβ3 plays an important role in the regulation of cell proliferation and neoangiogenesis. We found mesangial de novo expression of integrin αvβ3 in mesangioproliferative glomerulonephritis (MesGN). The aim of the study was to clarify if blockade of αvβ3 integrin with the specific αvβ3-blocking cyclic peptide RGDdFV (cRGD) has beneficial effects on the course of this disease. METHODS Habu snake venom (Habu) GN was induced in male C57BL/6 mice 1 week after uninephrectomy (6 mg Habu toxin/kg body weight intravenously). After 24 h, nephritic animals received αvβ3-inhibitory cRGD or cRAD control peptides for 3 or 7 days, respectively. The kidneys were investigated using morphometry, immunohistochemistry and TaqMan polymerase chain reaction. RESULTS At Day 3, serum creatinine and albuminuria were lower after cRGD compared to cRAD treatment. At Day 3, glomerulosclerosis index, percentage of glomerular injury, mesangial cell (MC) number and volume density of mesangial matrix were significantly lower (P < 0.05) in cRGD-treated mice than in cRAD-treated controls. At Day 7, only a mild effect of cRGD on mesangial matrix expansion and fibronectin messenger RNA was still detectable (P < 0.05). Complementary in vitro studies in MCs revealed that inhibition of αvβ3 by cRGD-blocked adhesion, reduced proliferation and increased apoptosis of MCs. CONCLUSION Habu GN inhibition of integrin αvβ3 by cRGD partly ameliorates early injury but has no or only mild effects on late glomerular lesions.
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Affiliation(s)
- Kerstin Amann
- Department of Pathology, University of Erlangen-Nürnberg, Erlangen, Germany
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38
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From kidney development to drug delivery and tissue engineering strategies in renal regenerative medicine. J Control Release 2011; 152:177-85. [DOI: 10.1016/j.jconrel.2011.01.034] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2010] [Accepted: 01/28/2011] [Indexed: 01/05/2023]
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Ross EA, Williams MJ, Hamazaki T, Terada N, Clapp WL, Adin C, Ellison GW, Jorgensen M, Batich CD. Embryonic stem cells proliferate and differentiate when seeded into kidney scaffolds. J Am Soc Nephrol 2009; 20:2338-47. [PMID: 19729441 DOI: 10.1681/asn.2008111196] [Citation(s) in RCA: 316] [Impact Index Per Article: 21.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
The scarcity of transplant allografts for diseased organs has prompted efforts at tissue regeneration using seeded scaffolds, an approach hampered by the enormity of cell types and complex architectures. Our goal was to decellularize intact organs in a manner that retained the matrix signal for differentiating pluripotent cells. We decellularized intact rat kidneys in a manner that preserved the intricate architecture and seeded them with pluripotent murine embryonic stem cells antegrade through the artery or retrograde through the ureter. Primitive precursor cells populated and proliferated within the glomerular, vascular, and tubular structures. Cells lost their embryonic appearance and expressed immunohistochemical markers for differentiation. Cells not in contact with the basement membrane matrix became apoptotic, thereby forming lumens. These observations suggest that the extracellular matrix can direct regeneration of the kidney, and studies using seeded scaffolds may help define differentiation pathways.
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Affiliation(s)
- Edward A Ross
- Division of Nephrology, Hypertension and Transplantation, University of Florida, Gainesville, FL 32610-0224, USA.
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Arnould C, Lelièvre-Pégorier M, Ronco P, Lelongt B. MMP9 limits apoptosis and stimulates branching morphogenesis during kidney development. J Am Soc Nephrol 2009; 20:2171-80. [PMID: 19713309 DOI: 10.1681/asn.2009030312] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
Early events in kidney organogenesis involve reciprocal interactions between the ureteric bud and the metanephric mesenchyme, which lead to remodeling of the extracellular matrix. This remodeling involves matrix metalloproteases (MMPs), but the specific roles of individual MMPs in kidney development are not completely understood. Here, we analyzed MMP9-deficient mice at the first step of kidney development and found that MMP9 deficiency delayed embryonic kidney maturation and increased apoptosis ex vivo by 2.5-fold. These early defects resulted in a 30% decrease in nephron number, a 20% decrease in adult kidney weight, and altered kidney function and morphology at 12 mo. The membrane form of stem cell factor (SCF) increased, whereas the activated form of the SCF receptor, c-kit, decreased in MMP9-deficient embryonic kidneys. In organotypic culture, MMP9-deficient kidneys failed to secrete SCF, and addition of recombinant SCF partially rescued both apoptosis and the branching defect. In conclusion, these data show that MMP9 protects mesenchymal cells from apoptosis during kidney development and stimulates ureteric bud branching morphogenesis, most likely by releasing the soluble form of SCF, suggesting that normal renal development requires MMP9.
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Affiliation(s)
- Catherine Arnould
- Université Pierre et Marie Curie University of Paris 06, Paris, France
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41
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Batchelder CA, Lee CCI, Matsell DG, Yoder MC, Tarantal AF. Renal ontogeny in the rhesus monkey (Macaca mulatta) and directed differentiation of human embryonic stem cells towards kidney precursors. Differentiation 2009; 78:45-56. [PMID: 19500897 PMCID: PMC2744219 DOI: 10.1016/j.diff.2009.05.001] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2008] [Revised: 03/16/2009] [Accepted: 05/03/2009] [Indexed: 01/14/2023]
Abstract
The development of the metanephric kidney was studied immunohistochemically across gestation in monkeys to identify markers of cell specification, and to aid in developing experimental paradigms for renal precursor differentiation from human embryonic stem cells (hESC). PAX2, an important kidney developmental marker, was expressed at the tips of the ureteric bud, in the surrounding condensing mesenchyme, and in the renal vesicle. Vimentin, a mesenchymal and renal marker, was strongly expressed in the metanephric blastema then found to be limited to the glomerulus and interstitial cells of the medulla and cortex. A model of gene expression based on human and nonhuman primate renal ontogeny was developed and incorporated into studies of hESC differentiation. Spontaneous hESC differentiation revealed markers of metanephric mesenchyme (OSR1, PAX2, SIX2, WT1) that increased over time, followed by upregulation of kidney precursor markers (EYA1, LIM1, CD24). Directed hESC differentiation was also evaluated with the addition of retinoic acid, Activin-A, and BMP-4 or BMP-7, and using different culture substrate conditions. Of the culture substrates studied, gelatin most closely recapitulated the anticipated directed developmental pattern of renal gene expression. No differences were found when BMP-4 and BMP-7 were compared with baseline conditions. PAX2 and Vimentin immunoreactivity in differentiating hESC was also similar to the renal precursor patterns reported for human fetal kidneys and findings described in rhesus monkeys. The results of these studies are as follows: (1) provide additional data to support that rhesus monkey kidney development parallels that of humans, and (2) provide a useful model for hESC directed differentiation towards renal precursors.
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Affiliation(s)
- Cynthia A. Batchelder
- Center of Excellence in Translational Human Stem Cell Research, University of California, Davis, CA, USA
- California National Primate Research Center, University of California, Davis, CA, USA
| | - C. Chang I. Lee
- Center of Excellence in Translational Human Stem Cell Research, University of California, Davis, CA, USA
- California National Primate Research Center, University of California, Davis, CA, USA
| | - Douglas G. Matsell
- Center of Excellence in Translational Human Stem Cell Research, University of California, Davis, CA, USA
- Child and Family Research Institute, Department of Pediatrics, University of British Columbia, Vancouver, British Columbia, Canada
| | - Mervin C. Yoder
- Center of Excellence in Translational Human Stem Cell Research, University of California, Davis, CA, USA
- Department of Pediatrics, Indiana University School of Medicine, Indianapolis, IN
| | - Alice F. Tarantal
- Center of Excellence in Translational Human Stem Cell Research, University of California, Davis, CA, USA
- California National Primate Research Center, University of California, Davis, CA, USA
- Department of Pediatrics and Cell Biology and Human Anatomy, University of California, Davis, CA, USA
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Maeshima A. Label-retaining cells in the kidney: origin of regenerating cells after renal ischemia. Clin Exp Nephrol 2007; 11:269-274. [DOI: 10.1007/s10157-007-0500-9] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2007] [Accepted: 08/15/2007] [Indexed: 01/09/2023]
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Linton JM, Martin GR, Reichardt LF. The ECM protein nephronectin promotes kidney development via integrin alpha8beta1-mediated stimulation of Gdnf expression. Development 2007; 134:2501-9. [PMID: 17537792 PMCID: PMC2757411 DOI: 10.1242/dev.005033] [Citation(s) in RCA: 136] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Development of the metanephric kidney crucially depends on proper interactions between cells and the surrounding extracellular matrix. For example, we showed previously that in the absence of alpha8beta1 integrin, invasion by the ureteric bud into the metanephric mesenchyme is inhibited, resulting in renal agenesis. Here we present genetic evidence that the extracellular matrix protein nephronectin is an essential ligand that engages alpha8beta1 integrin during early kidney development. We show that embryos lacking a functional nephronectin gene frequently display kidney agenesis or hypoplasia, which can be traced to a delay in the invasion of the metanephric mesenchyme by the ureteric bud at an early stage of kidney development. Significantly, we detected no defects in extracellular matrix organization in the nascent kidneys of the nephronectin mutants. Instead, we found that Gdnf expression was dramatically reduced in both nephronectin- and alpha8 integrin-null mutants specifically in the metanephric mesenchyme at the time of ureteric bud invasion. We show that this reduction is sufficient to explain the agenesis and hypoplasia observed in both mutants. Interestingly, the reduction in Gdnf expression is transient, and its resumption presumably enables the nephronectin-deficient ureteric buds to invade the metanephric mesenchyme and begin branching. Our results thus place nephronectin and alpha8beta1 integrin in a pathway that regulates Gdnf expression and is essential for kidney development.
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Affiliation(s)
- James M. Linton
- Department of Physiology, 1550 Fourth Street, University of California, San Francisco, San Francisco, CA 94143, USA
| | - Gail R. Martin
- Department of Anatomy, 1550 Fourth Street, University of California, San Francisco, San Francisco, CA 94143, USA
| | - Louis F. Reichardt
- Department of Physiology, 1550 Fourth Street, University of California, San Francisco, San Francisco, CA 94143, USA
- Howard Hughes Medical Institute, 1550 Fourth Street, University of California, San Francisco, San Francisco, CA 94143, USA
- Author for correspondence (e-mail: )
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Kuschel C, Steuer H, Maurer AN, Kanzok B, Stoop R, Angres B. Cell adhesion profiling using extracellular matrix protein microarrays. Biotechniques 2006; 40:523-31. [PMID: 16629399 DOI: 10.2144/000112134] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
We have developed a microarray-based system for cell adhesion profiling of large panels of cell-adhesive proteins to increase the throughput of in vitro cell adhesion assays, which are currently primarily performed in multiwell plates. Miniaturizing cell adhesion assays to an array format required the development of protocols for the reproducible microspotting of extracellular matrix (ECM) protein solutions and for the handling of cell suspensions during the assay. We generated ECM protein microarrays with high re-producibility in microspot protein content using nitrocellulose-coated glass microslides, combined with piezoelectric microspotting of protein solutions. Protocols were developed that allowed us to use 5000 cells or fewer on an array of 4 × 4 mm consisting of 64 microspots. Using this microarray system, we identified differences of adhesive properties of three cell lines to 14 different ECM proteins. Furthermore, the sensitivity and accuracy of the assays were increased using microarrays with ranges of ECM protein amounts. This microarray system will be particularly useful for extensive comparative cell adhesion profiling studies when only low amounts of adhesive substrate and cells, such as stem cells or cells from biopsies, are available.
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Maeshima A, Sakurai H, Nigam SK. Adult kidney tubular cell population showing phenotypic plasticity, tubulogenic capacity, and integration capability into developing kidney. J Am Soc Nephrol 2005; 17:188-98. [PMID: 16338966 DOI: 10.1681/asn.2005040370] [Citation(s) in RCA: 99] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Using in vivo bromodeoxyuridine (BrdU) labeling, a tubular cell population (label-retaining tubular cells [LRTC]) was identified recently in normal adult kidneys, which contributes actively to the regeneration process of the kidney after injury. Here, these LRTC are characterized in vitro. The LRTC population was isolated from BrdU-treated rat kidney by FACS. Both LRTC and non-LRTC underwent proliferation and maintained an epithelial phenotype in the presence of tubulogenic growth factors such as EGF, TGF-alpha, IGF-I, and hepatocyte growth factor. It is interesting that LRTC also proliferated without epithelial markers expression in the presence of soluble factors derived from an embryonic kidney metanephric mesenchyme cell line. The type of extracellular matrix strongly influenced the phenotype of LRTC. Furthermore, in three-dimensional collagen gel culture, LRTC formed tubule-like or tubulocystic structures in response to growth factors (hepatocyte growth factor and fibroblast growth factor) that are known to induce kidney cell tubulogenesis in vitro and/or participate in renal regeneration in vivo. In contrast, non-LRTC did not form these structures. When transplanted into the metanephric kidney, LRTC but not non-LRTC were integrated into epithelial components of nephron, including the proximal tubular cells and the ureteric bud. They also differentiated into fibroblast-like cells. Collectively, these findings suggest that LRTC are an adult kidney tubular cell population that shows phenotypic plasticity, tubulogenic capacity, and integration capability into the developing kidney.
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Affiliation(s)
- Akito Maeshima
- Department of Pediatrics, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0693, USA
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Leimeister C, Schumacher N, Diez H, Gessler M. Cloning and expression analysis of the mouse stroma marker Snep encoding a novel nidogen domain protein. Dev Dyn 2004; 230:371-7. [PMID: 15162516 DOI: 10.1002/dvdy.20056] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The vertebrate kidney develops through a series of mesenchymal-epithelial interactions between the ureteric bud and the metanephrogenic mesenchyme to form nephrons and the collecting system, which are both embedded in the renal interstitium. The interstitial stromal cells are an essential prerequisite for regular kidney development, but their origin and function is poorly understood. They are found in the kidney periphery and the medulla and are likely derived from the kidney mesenchyme and/or from migrating neural crest cells. During late kidney development, stromal cells are lost through massive apoptosis. We have identified a novel marker of kidney stroma cells, Snep (stromal nidogen extracellular matrix protein), that is additionally expressed in mesenchymal cells of other embryonic tissues and within the nervous system. Of interest, Snep transcripts are also found at sites of embryonic apoptosis. Furthermore, comparative expression analysis of kidney stroma markers suggests that Snep is expressed in a specific subpopulation of stromal cells and may provide environmental cues to support regular development.
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Affiliation(s)
- Cornelia Leimeister
- Theodor-Boveri-Institute, Physiological Chemistry I, University of Wuerzburg, Wuerzburg, Germany
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