Featured
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Editorial |
The promise of organoids and embryoids
Over the last few years, there has been a shift towards the use of three-dimensional multicellular structures that more closely recapitulate native tissues and organs as tools to understand development, physiology and pathology.
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Review Article |
Rethinking organoid technology through bioengineering
This Review provides an overview of bioengineering technologies that can be harnessed to facilitate the culture, self-organization and functionality of human pluripotent stem cell-derived organoids.
- Elena Garreta
- , Roger D. Kamm
- & Nuria Montserrat
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Review Article |
Stem-cell-based embryo models for fundamental research and translation
This Review highlights the recent emergence of stem-cell-derived embryo models for the purpose of advancing our understanding of mammalian embryology as well as their potential uses in regenerative and reproductive medicine.
- Jianping Fu
- , Aryeh Warmflash
- & Matthias P. Lutolf
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Article |
Wnt-modified materials mediate asymmetric stem cell division to direct human osteogenic tissue formation for bone repair
Wnt3a protein has been immobilized on a biocompatible bandage and is now shown to induce oriented asymmetric cell division of human skeletal stem cells and can also promote bone tissue repair in vivo.
- Yoshihisa Okuchi
- , Joshua Reeves
- & Shukry J. Habib
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Article |
ILC1 drive intestinal epithelial and matrix remodelling
Type-1 innate lymphoid cells have been shown to drive intestinal epithelial proliferation and extracellular matrix remodelling through TGF-β1 secretion, which could exacerbate inflammatory bowel disease comorbidities such as cancer and fibrosis.
- Geraldine M. Jowett
- , Michael D. A. Norman
- & Eileen Gentleman
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News & Views |
CRISPR genome editing in stem cells turns to gold
Hematopoietic stem and progenitor cells have been engineered using gold nanoformulations conjugated with CRISPR capable of targeting two distinct genomic loci of therapeutic interest, with potential engraftment in humanized mouse models.
- Aravind Asokan
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News & Views |
Mastering their own fates through the matrix
With their ability to give rise to many different cell types, stem cells have long been a target of scientists who seek to achieve control over their differentiation. New evidence suggests that stem cells influence their own fates through protein deposition and physical remodelling of their microenvironment.
- Eric L. Qiao
- , Sanjay Kumar
- & David V. Schaffer
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Article |
Targeted homology-directed repair in blood stem and progenitor cells with CRISPR nanoformulations
Gold nanoparticles that passively deliver CRISPR machinery to blood repopulating cells have been developed and are shown to be capable of precise editing of multiple genetic loci of therapeutic interest without cytotoxicity or reduced fitness.
- Reza Shahbazi
- , Gabriella Sghia-Hughes
- & Jennifer E. Adair
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News & Views |
A pulpy story
Over-expression of a transcriptional factor, Alx3, has been shown to revitalize the regenerative capacity of adult progenitor cells to promote enhanced stromal vascularization and formation of parenchymal dental pulp tissue in vivo.
- Sarah E. Millar
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Article |
Parenchymal and stromal tissue regeneration of tooth organ by pivotal signals reinstated in decellularized matrix
The Alx3 transcription factor, expressed in prenatal tooth development, is shown to revitalize adult progenitor cells in decellularized scaffolds, leading to enhanced parenchymal dental pulp and vascularized stroma regeneration in vivo.
- Ling He
- , Jian Zhou
- & Jeremy Mao
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News & Views |
Accelerating maturation of kidney organoids
A two-step method has been developed for the accelerated and efficient generation of human kidney organoids using in vitro and in ovo culture in a three-dimensional environment.
- Susana M. Chuva de Sousa Lopes
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Article |
Fine tuning the extracellular environment accelerates the derivation of kidney organoids from human pluripotent stem cells
A method to accelerate the generation of kidney organoids from human pluripotent stem cells cultured in a three-dimensional environment and exposed to inductive stimuli has been developed, with the organoids capable of recapitulating kidney organogenesis.
- Elena Garreta
- , Patricia Prado
- & Nuria Montserrat
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Review Article |
Biomaterials and engineered microenvironments to control YAP/TAZ-dependent cell behaviour
Biomaterials have been utilized widely to study cellular mechanotransduction. This Review discusses how cells respond to mechanical cues elicited by a range of biomaterial characteristics via YAP/TAZ mechanosensitive transcriptional factor activity.
- Giovanna Brusatin
- , Tito Panciera
- & Stefano Piccolo
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News & Views |
Mechanics-guided developmental fate patterning
A micropatterned human pluripotent stem cell-based developmental model was utilized to demonstrate the role of biophysical cues such as cell size and cytoskeletal contractile forces in directing patterning of neuroepithelial and neural plate border cells.
- Mukul Tewary
- & Peter W. Zandstra
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Article |
Mechanics-guided embryonic patterning of neuroectoderm tissue from human pluripotent stem cells
Mechanical cues play critical roles in embryonic development. A micropatterned neuroectoderm developmental model based on human pluripotent stem cells now reveals how morophogenetic signals such as cell shape and contractility regulate neural tissue development.
- Xufeng Xue
- , Yubing Sun
- & Jianping Fu
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Letter |
Cell-geometry-dependent changes in plasma membrane order direct stem cell signalling and fate
The mechanism by which cell geometry regulates cell signalling is reported to be modulated by lipid rafts within the plasma membrane, which are now shown to be responsible for geometry-dependent mesenchymal stem cell differentiation.
- Thomas C. von Erlach
- , Sergio Bertazzo
- & Molly M. Stevens
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News & Views |
Making way for neural stemness
The influence of matrix stiffness and degradation on neural progenitor cell stemness was investigated in a three-dimensional culture system, highlighting the role of remodelling in enhancing cell-to-cell interaction and ultimately maintaining neural stemness.
- Phillip H. Kang
- , Sanjay Kumar
- & David V. Schaffer
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Commentary |
Designer biomaterials for mechanobiology
Biomaterials engineered with specific bioactive ligands, tunable mechanical properties and complex architecture have emerged as powerful tools to probe cell sensing and response to physical properties of their material surroundings, and ultimately provide designer approaches to control cell function.
- Linqing Li
- , Jeroen Eyckmans
- & Christopher S. Chen
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Article |
Maintenance of neural progenitor cell stemness in 3D hydrogels requires matrix remodelling
The physical properties of biomaterials affect cell behaviour. Here, the authors investigate how stiffness and degradation of hydrogels affect signalling pathways that modulate the maintenance of stemness of neural progenitor cells.
- Christopher M. Madl
- , Bauer L. LeSavage
- & Sarah C. Heilshorn
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Letter |
Organoid cystogenesis reveals a critical role of microenvironment in human polycystic kidney disease
Tissue mimics are of great interest in understanding diseases. Here, organoids were developed that resemble polycystic kidney disease cysts and it was demonstrated how material environment and adhesion can affect cystogenesis and disease progression.
- Nelly M. Cruz
- , Xuewen Song
- & Benjamin S. Freedman
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Letter |
Self-organized amniogenesis by human pluripotent stem cells in a biomimetic implantation-like niche
The control of biophysical cues during the culture of human pluripotent stem cells on biomaterial substrates can be used to replicate the in vivo amniogenic environment and direct in vitro generation of early human amniotic tissue.
- Yue Shao
- , Kenichiro Taniguchi
- & Jianping Fu
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Article |
N-cadherin adhesive interactions modulate matrix mechanosensing and fate commitment of mesenchymal stem cells
N-cadherin can alter how the stiffening extracellular microenvironment is interpreted by mesenchymal stem cells, leading to subsequent changes in downstream cell proliferation and differentiation.
- Brian D. Cosgrove
- , Keeley L. Mui
- & Robert L. Mauck
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News & Views |
A 3D boost
Biophysical factors in an optimized three-dimensional microenvironment enhance the reprogramming efficiency of human somatic cells into pluripotent stem cells when compared to traditional cell-culture substrates.
- Oscar J. Abilez
- & Joseph C. Wu
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Article |
Defined three-dimensional microenvironments boost induction of pluripotency
The confinement imposed by the three-dimensional microenvironment promotes the induction of pluripotency in somatic cells through an accelerated mesenchymal-to-epithelial transition and increased epigenetic remodelling.
- Massimiliano Caiazzo
- , Yuya Okawa
- & Matthias P. Lutolf
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Commentary |
Combining insoluble and soluble factors to steer stem cell fate
Materials-based control of stem cell fate is beginning to be rigorously combined with traditional soluble-factor approaches to better understand the cells' behaviour and maximize their potential for therapy.
- P. C. Dave P. Dingal
- & Dennis E. Discher
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Editorial |
Mechanobiology in harness
Understanding how cells sense and adapt to their environment, and engineering defined culture substrates, will be central to progress in tissue engineering and regenerative medicine.
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News & Views |
Auxetic nuclei
The nuclei of naive mouse embryonic stem cells that are transitioning towards differentiation expand when the cells are stretched and contract when they are compressed. What drives this auxetic phenotype is, however, unclear.
- Ning Wang
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News & Views |
Sticky mechanical memory
Physical cues from the extracellular environment influence the lineage commitment of stem cells. Now, experiments on human mesenchymal stem cells cultured on photodegradable hydrogels show that the cells' fate can also be determined by past physical environments.
- Jeroen Eyckmans
- & Christopher S. Chen
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News & Views |
Into the groove
Adult cells can be routinely reprogrammed into pluripotent stem cells by chemical and genetic means, such as the expression of a cocktail of exogenous transcription factors. It is now shown that growing cells on substrates with aligned features such as microgrooves can enhance this process.
- Yan Xu
- , Longqi Liu
- & Miguel A. Esteban
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Article |
Biophysical regulation of epigenetic state and cell reprogramming
Somatic cells can be reprogrammed into induced pluripotent stem cells biochemically through the expression of a few transcription factors. It is now shown that aligned microgrooves or nanofibres on cell-adhesive substrates can promote the reprogramming of somatic cells more efficiently through epigenetic regulation of genes related to pluripotency and the mesenchymal-to-epithelial transition. The findings suggest that the epigenetic state can be regulated by variations in cell morphology.
- Timothy L. Downing
- , Jennifer Soto
- & Song Li
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News & Views |
Differential stickiness
Technologies to isolate colonies of human pluripotent stem cells from other cell types in a high-throughput manner are lacking. A microfluidic-based approach that exploits differences in the adhesion strength between these cells and a substrate may soon fill the gap.
- Oscar J. Abilez
- & Joseph C. Wu
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Article |
Degradation-mediated cellular traction directs stem cell fate in covalently crosslinked three-dimensional hydrogels
Adhesive interactions between stem cells and the extracellular matrix are known to regulate stem cell differentiation, yet the underlying mechanisms are not well understood. It is now shown that fate decisions of stem cells encapsulated in covalently crosslinked hydrogels are regulated, independently of matrix mechanics and cell morphology, by the cellular tension generated from cell-induced degradation of the hydrogels.
- Sudhir Khetan
- , Murat Guvendiren
- & Jason A. Burdick
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News & Views |
Anchoring cell-fate cues
The spreading and differentiation of stem cells depends on the stiffness of the extracellular matrix. Now, experiments on human epidermal and mesenchymal stem cells cultured on substrates with covalently attached collagen fibres show that the cells sense and respond to the anchoring of the collagen fibres to the substrate.
- Ovijit Chaudhuri
- & David J. Mooney
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Article |
Nanoscale surfaces for the long-term maintenance of mesenchymal stem cell phenotype and multipotency
On standard tissue culture platforms, mesenchymal stem cells tend to spontaneously differentiate with the loss of multi-lineage potential. Now, a robust and reproducible nanotopographical platform has been shown to maintain stem cell phenotype and promote stem cell growth over several months whilst implicating mechanisms for the observed stem cell behaviour
- Rebecca J. McMurray
- , Nikolaj Gadegaard
- & Matthew J. Dalby
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Article |
Combinatorial development of biomaterials for clonal growth of human pluripotent stem cells
Structure–property relationships between material properties and stem cell behaviour are investigated using high-throughput methods. The data identify the optimal substrates within a range of different polymeric surfaces to support the growth and self-renewal of human embryonic stem cells from fully dissociated single cells.
- Ying Mei
- , Krishanu Saha
- & Daniel G. Anderson
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News & Views |
Stressed-out stem cells
Experiments have shown that the physical characteristics of the matrix surrounding a stem cell can affect its behaviour. This picture gets further complicated by studies of stem cells and their differentiated counterparts that show that the cells' own softness also has a clear role in how they respond to stress.
- Andrew W. Holle
- & Adam J. Engler
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