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Hermans F, Hasevoets S, Vankelecom H, Bronckaers A, Lambrichts I. From Pluripotent Stem Cells to Organoids and Bioprinting: Recent Advances in Dental Epithelium and Ameloblast Models to Study Tooth Biology and Regeneration. Stem Cell Rev Rep 2024:10.1007/s12015-024-10702-w. [PMID: 38498295 DOI: 10.1007/s12015-024-10702-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/20/2024] [Indexed: 03/20/2024]
Abstract
Ameloblasts are the specialized dental epithelial cell type responsible for enamel formation. Following completion of enamel development in humans, ameloblasts are lost and biological repair or regeneration of enamel is not possible. In the past, in vitro models to study dental epithelium and ameloblast biology were limited to freshly isolated primary cells or immortalized cell lines, both with limited translational potential. In recent years, large strides have been made with the development of induced pluripotent stem cell and organoid models of this essential dental lineage - both enabling modeling of human dental epithelium. Upon induction with several different signaling factors (such as transforming growth factor and bone morphogenetic proteins) these models display elevated expression of ameloblast markers and enamel matrix proteins. The advent of 3D bioprinting, and its potential combination with these advanced cellular tools, is poised to revolutionize the field - and its potential for tissue engineering, regenerative and personalized medicine. As the advancements in these technologies are rapidly evolving, we evaluate the current state-of-the-art regarding in vitro cell culture models of dental epithelium and ameloblast lineage with a particular focus toward their applicability for translational tissue engineering and regenerative/personalized medicine.
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Affiliation(s)
- Florian Hermans
- Department of Cardiology and Organ Systems (COS), Biomedical Research Institute (BIOMED), Faculty of Medicine and Life Sciences, Hasselt University, Diepenbeek, 3590, Belgium.
| | - Steffie Hasevoets
- Department of Cardiology and Organ Systems (COS), Biomedical Research Institute (BIOMED), Faculty of Medicine and Life Sciences, Hasselt University, Diepenbeek, 3590, Belgium
| | - Hugo Vankelecom
- Laboratory of Tissue Plasticity in Health and Disease, Cluster of Stem Cell and Developmental Biology, Department of Development and Regeneration, KU Leuven, Leuven, 3000, Belgium
| | - Annelies Bronckaers
- Department of Cardiology and Organ Systems (COS), Biomedical Research Institute (BIOMED), Faculty of Medicine and Life Sciences, Hasselt University, Diepenbeek, 3590, Belgium
| | - Ivo Lambrichts
- Department of Cardiology and Organ Systems (COS), Biomedical Research Institute (BIOMED), Faculty of Medicine and Life Sciences, Hasselt University, Diepenbeek, 3590, Belgium.
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Hermans F, Hemeryck L, Bueds C, Torres Pereiro M, Hasevoets S, Kobayashi H, Lambrechts D, Lambrichts I, Bronckaers A, Vankelecom H. Organoids from mouse molar and incisor as new tools to study tooth-specific biology and development. Stem Cell Reports 2023; 18:1166-1181. [PMID: 37084723 DOI: 10.1016/j.stemcr.2023.03.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 03/22/2023] [Accepted: 03/23/2023] [Indexed: 04/23/2023] Open
Abstract
Organoid models provide powerful tools to study tissue biology and development in a dish. Presently, organoids have not yet been developed from mouse tooth. Here, we established tooth organoids (TOs) from early-postnatal mouse molar and incisor, which are long-term expandable, express dental epithelium stem cell (DESC) markers, and recapitulate key properties of the dental epithelium in a tooth-type-specific manner. TOs display in vitro differentiation capacity toward ameloblast-resembling cells, even more pronounced in assembloids in which dental mesenchymal (pulp) stem cells are combined with the organoid DESCs. Single-cell transcriptomics supports this developmental potential and reveals co-differentiation into junctional epithelium- and odontoblast-/cementoblast-like cells in the assembloids. Finally, TOs survive and show ameloblast-resembling differentiation also in vivo. The developed organoid models provide new tools to study mouse tooth-type-specific biology and development and gain deeper molecular and functional insights that may eventually help to achieve future human biological tooth repair and replacement.
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Affiliation(s)
- Florian Hermans
- Department of Morphology, Biomedical Research Institute, Faculty of Medicine and Life Sciences, Hasselt University, 3590 Diepenbeek, Belgium; Laboratory of Tissue Plasticity in Health and Disease, Cluster of Stem Cell and Developmental Biology, Department of Development and Regeneration, KU Leuven (University of Leuven), 3000 Leuven, Belgium
| | - Lara Hemeryck
- Laboratory of Tissue Plasticity in Health and Disease, Cluster of Stem Cell and Developmental Biology, Department of Development and Regeneration, KU Leuven (University of Leuven), 3000 Leuven, Belgium
| | - Celine Bueds
- Laboratory of Tissue Plasticity in Health and Disease, Cluster of Stem Cell and Developmental Biology, Department of Development and Regeneration, KU Leuven (University of Leuven), 3000 Leuven, Belgium
| | - Marc Torres Pereiro
- Laboratory of Tissue Plasticity in Health and Disease, Cluster of Stem Cell and Developmental Biology, Department of Development and Regeneration, KU Leuven (University of Leuven), 3000 Leuven, Belgium
| | - Steffie Hasevoets
- Department of Morphology, Biomedical Research Institute, Faculty of Medicine and Life Sciences, Hasselt University, 3590 Diepenbeek, Belgium
| | - Hiroto Kobayashi
- Department of Anatomy and Structural Science, Yamagata University Faculty of Medicine, Yamagata, Japan
| | - Diether Lambrechts
- Center for Cancer Biology, VIB, 3000 Leuven, Belgium; Laboratory for Translational Genetics, Department of Human Genetics, KU Leuven, 3000 Leuven, Belgium
| | - Ivo Lambrichts
- Department of Morphology, Biomedical Research Institute, Faculty of Medicine and Life Sciences, Hasselt University, 3590 Diepenbeek, Belgium
| | - Annelies Bronckaers
- Department of Morphology, Biomedical Research Institute, Faculty of Medicine and Life Sciences, Hasselt University, 3590 Diepenbeek, Belgium.
| | - Hugo Vankelecom
- Laboratory of Tissue Plasticity in Health and Disease, Cluster of Stem Cell and Developmental Biology, Department of Development and Regeneration, KU Leuven (University of Leuven), 3000 Leuven, Belgium.
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Van de Perck E, Van Loo D, Hermans F, Verbraecken J, Vanderveken O. The efficacy and dosage of acetazolamide in patients with obstructive sleep apnea: preliminary results of a double-blind, placebo-controlled, randomized trial. Sleep Med 2022. [DOI: 10.1016/j.sleep.2022.05.765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Hermans F, Bueds C, Hemeryck L, Lambrichts I, Bronckaers A, Vankelecom H. Establishment of inclusive single-cell transcriptome atlases from mouse and human tooth as powerful resource for dental research. Front Cell Dev Biol 2022; 10:1021459. [PMID: 36299483 PMCID: PMC9590651 DOI: 10.3389/fcell.2022.1021459] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Accepted: 09/12/2022] [Indexed: 11/13/2022] Open
Abstract
Single-cell (sc) omics has become a powerful tool to unravel a tissue’s cell landscape across health and disease. In recent years, sc transcriptomic interrogation has been applied to a variety of tooth tissues of both human and mouse, which has considerably advanced our fundamental understanding of tooth biology. Now, an overarching and integrated bird’s-view of the human and mouse tooth sc transcriptomic landscape would be a powerful multi-faceted tool for dental research, enabling further decipherment of tooth biology and development through constantly progressing state-of-the-art bioinformatic methods as well as the exploration of novel hypothesis-driven research. To this aim, we re-assessed and integrated recently published scRNA-sequencing datasets of different dental tissue types (healthy and diseased) from human and mouse to establish inclusive tooth sc atlases, and applied the consolidated data map to explore its power. For mouse tooth, we identified novel candidate transcriptional regulators of the ameloblast lineage. Regarding human tooth, we provide support for a developmental connection, not advanced before, between specific epithelial compartments. Taken together, we established inclusive mouse and human tooth sc atlases as powerful tools to potentiate innovative research into tooth biology, development and disease. The maps are provided online in an accessible format for interactive exploration.
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Affiliation(s)
- Florian Hermans
- Laboratory of Tissue Plasticity in Health and Disease, Cluster of Stem Cell and Developmental Biology, Department of Development and Regeneration, Leuven Stem Cell Institute, KU Leuven (University of Leuven), Leuven, Belgium
- UHasselt-Hasselt University, Biomedical Research Institute (BIOMED), Department of Cardio and Organ Systems, Diepenbeek, Belgium
- *Correspondence: Florian Hermans, ; Hugo Vankelecom,
| | - Celine Bueds
- Laboratory of Tissue Plasticity in Health and Disease, Cluster of Stem Cell and Developmental Biology, Department of Development and Regeneration, Leuven Stem Cell Institute, KU Leuven (University of Leuven), Leuven, Belgium
| | - Lara Hemeryck
- Laboratory of Tissue Plasticity in Health and Disease, Cluster of Stem Cell and Developmental Biology, Department of Development and Regeneration, Leuven Stem Cell Institute, KU Leuven (University of Leuven), Leuven, Belgium
| | - Ivo Lambrichts
- UHasselt-Hasselt University, Biomedical Research Institute (BIOMED), Department of Cardio and Organ Systems, Diepenbeek, Belgium
| | - Annelies Bronckaers
- UHasselt-Hasselt University, Biomedical Research Institute (BIOMED), Department of Cardio and Organ Systems, Diepenbeek, Belgium
| | - Hugo Vankelecom
- Laboratory of Tissue Plasticity in Health and Disease, Cluster of Stem Cell and Developmental Biology, Department of Development and Regeneration, Leuven Stem Cell Institute, KU Leuven (University of Leuven), Leuven, Belgium
- *Correspondence: Florian Hermans, ; Hugo Vankelecom,
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Laporte E, Hermans F, De Vriendt S, Vennekens A, Lambrechts D, Nys C, Cox B, Vankelecom H. Decoding the activated stem cell phenotype of the neonatally maturing pituitary. eLife 2022; 11:75742. [PMID: 35699412 PMCID: PMC9333987 DOI: 10.7554/elife.75742] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Accepted: 06/13/2022] [Indexed: 12/02/2022] Open
Abstract
The pituitary represents the endocrine master regulator. In mouse, the gland undergoes active maturation immediately after birth. Here, we in detail portrayed the stem cell compartment of neonatal pituitary. Single-cell RNA-sequencing pictured an active gland, revealing proliferative stem as well as hormonal (progenitor) cell populations. The stem cell pool displayed a hybrid epithelial/mesenchymal phenotype, characteristic of development-involved tissue stem cells. Organoid culturing recapitulated the stem cells’ phenotype, interestingly also reproducing their paracrine activity. The pituitary stem cell-activating interleukin-6 advanced organoid growth, although the neonatal stem cell compartment was not visibly affected in Il6−/− mice, likely due to cytokine family redundancy. Further transcriptomic analysis exposed a pronounced WNT pathway in the neonatal gland, shown to be involved in stem cell activation and to overlap with the (fetal) human pituitary transcriptome. Following local damage, the neonatal gland efficiently regenerates, despite absence of additional stem cell proliferation, or upregulated IL-6 or WNT expression, all in line with the already high stem cell activation status, thereby exposing striking differences with adult pituitary. Together, our study decodes the stem cell compartment of neonatal pituitary, exposing an activated state in the maturing gland. Understanding stem cell activation is key to potential pituitary regenerative prospects. The pituitary gland is a pea-sized structure found just below the brain that produces hormones controlling everything from growth and stress to reproduction and immunity. To perform its role, the pituitary gland needs specialised hormone-producing cells, but it also contains stem cells. These stem cells can divide to produce more cells like themselves, or differentiate into cells of different types, including hormone-producing cells. In mice, the stem cells of the pituitary gland appear to be activated in the first few weeks after birth, and later become ‘quiescent’ (or lazy) in the adult pituitary gland. However, it remains unclear how the activated state found in the maturing gland is established and regulated. To answer this question, Laporte et al. used single-cell RNA sequencing, a technique that allows researchers to profile which genes are active in individual cells, which can provide vital information about the state and activity of a tissue. The researchers compared the cells of the maturing pituitary gland of newborn mice to the cells in the established gland of adult mice. This analysis revealed that the maturing pituitary gland is a dynamic tissue, with populations of cells that are actively dividing (including the stem cells), which the mature pituitary gland lacks. Additionally, Laporte et al. established the molecular basis for the activated state of the stem cells in the maturing pituitary gland, which relies on the activation of a cell signalling pathway called WNT. To confirm these findings, Laporte et al. used an organoid system that allowed them to recapitulate the stem cell compartment of the maturing pituitary gland in a dish. When Laporte et al. blocked WNT signalling in these organoids, the organoids failed to form or divide. Furthermore, blocking the pathway directly in newborn mice reduced the number of dividing stem cells in the pituitary gland. Both findings support the notion that WNT signalling is required to establish the activated state of the maturing pituitary gland in newborn mice. Laporte et al. also wanted to know whether the newborn pituitary gland responded to injury differently than the adult gland. It had already been established that the adult pituitary stem cells become activated upon injury, and that the gland has some regenerative capacity. However, when Laporte et al. injured the newborn pituitary gland, the gland was able to fully regenerate, despite the stem cells not becoming more activated. This is likely because these cells are already activated (or ‘primed’), and do not require further activation to divide and repair the gland with the help of other proliferating cells. With these results, Laporte et al. shed light on the activated state of the stem cells in the pituitary gland of newborn mice. This provides insight into the role of these stem cells, as well as unveiling possible routes towards regenerating pituitary tissue. This could eventually prove useful in medicine, in cases when the pituitary gland is damaged or removed.
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Affiliation(s)
- Emma Laporte
- Department of Development and Regeneration, KU Leuven, Leuven, Belgium
| | - Florian Hermans
- Department of Development and Regeneration, KU Leuven, Leuven, Belgium
| | - Silke De Vriendt
- Department of Development and Regeneration, KU Leuven, Leuven, Belgium
| | | | | | - Charlotte Nys
- Department of Development and Regeneration, KU Leuven, Leuven, Belgium
| | - Benoit Cox
- Department of Development and Regeneration, KU Leuven, Leuven, Belgium
| | - Hugo Vankelecom
- Department of Development and Regeneration, KU Leuven, Leuven, Belgium
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Hermans F, Hemeryck L, Lambrichts I, Bronckaers A, Vankelecom H. Intertwined Signaling Pathways Governing Tooth Development: A Give-and-Take Between Canonical Wnt and Shh. Front Cell Dev Biol 2021; 9:758203. [PMID: 34778267 PMCID: PMC8586510 DOI: 10.3389/fcell.2021.758203] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Accepted: 10/11/2021] [Indexed: 11/13/2022] Open
Abstract
Teeth play essential roles in life. Their development relies on reciprocal interactions between the ectoderm-derived dental epithelium and the underlying neural crest-originated mesenchyme. This odontogenic process serves as a prototype model for the development of ectodermal appendages. In the mouse, developing teeth go through distinct morphological phases that are tightly controlled by epithelial signaling centers. Crucial molecular regulators of odontogenesis include the evolutionarily conserved Wnt, BMP, FGF and sonic hedgehog (Shh) pathways. These signaling modules do not act on their own, but are closely intertwined during tooth development, thereby outlining the path to be taken by specific cell populations including the resident dental stem cells. Recently, pivotal Wnt-Shh interaction and feedback loops have been uncovered during odontogenesis, showing conservation in other developing ectodermal appendages. This review provides an integrated overview of the interplay between canonical Wnt and Shh throughout mouse tooth formation stages, extending from the initiation of dental placode to the fully formed adult tooth.
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Affiliation(s)
- Florian Hermans
- Laboratory of Tissue Plasticity in Health and Disease, Cluster of Stem Cell and Developmental Biology, Department of Development and Regeneration, Leuven Stem Cell Institute, KU Leuven (University of Leuven), Leuven, Belgium.,Biomedical Research Institute (BIOMED), Department of Cardio and Organ Systems, UHasselt-Hasselt University, Diepenbeek, Belgium
| | - Lara Hemeryck
- Laboratory of Tissue Plasticity in Health and Disease, Cluster of Stem Cell and Developmental Biology, Department of Development and Regeneration, Leuven Stem Cell Institute, KU Leuven (University of Leuven), Leuven, Belgium
| | - Ivo Lambrichts
- Biomedical Research Institute (BIOMED), Department of Cardio and Organ Systems, UHasselt-Hasselt University, Diepenbeek, Belgium
| | - Annelies Bronckaers
- Biomedical Research Institute (BIOMED), Department of Cardio and Organ Systems, UHasselt-Hasselt University, Diepenbeek, Belgium
| | - Hugo Vankelecom
- Laboratory of Tissue Plasticity in Health and Disease, Cluster of Stem Cell and Developmental Biology, Department of Development and Regeneration, Leuven Stem Cell Institute, KU Leuven (University of Leuven), Leuven, Belgium
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Vennekens A, Laporte E, Hermans F, Cox B, Modave E, Janiszewski A, Nys C, Kobayashi H, Malengier-Devlies B, Chappell J, Matthys P, Garcia MI, Pasque V, Lambrechts D, Vankelecom H. Interleukin-6 is an activator of pituitary stem cells upon local damage, a competence quenched in the aging gland. Proc Natl Acad Sci U S A 2021; 118:e2100052118. [PMID: 34161279 PMCID: PMC8237615 DOI: 10.1073/pnas.2100052118] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
Stem cells in the adult pituitary are quiescent yet show acute activation upon tissue injury. The molecular mechanisms underlying this reaction are completely unknown. We applied single-cell transcriptomics to start unraveling the acute pituitary stem cell activation process as occurring upon targeted endocrine cell-ablation damage. This stem cell reaction was contrasted with the aging (middle-aged) pituitary, known to have lost damage-repair capacity. Stem cells in the aging pituitary show regressed proliferative activation upon injury and diminished in vitro organoid formation. Single-cell RNA sequencing uncovered interleukin-6 (IL-6) as being up-regulated upon damage, however only in young but not aging pituitary. Administering IL-6 to young mice promptly triggered pituitary stem cell proliferation, while blocking IL-6 or associated signaling pathways inhibited such reaction to damage. By contrast, IL-6 did not generate a pituitary stem cell activation response in aging mice, coinciding with elevated basal IL-6 levels and raised inflammatory state in the aging gland (inflammaging). Intriguingly, in vitro stem cell activation by IL-6 was discerned in organoid culture not only from young but also from aging pituitary, indicating that the aging gland's stem cells retain intrinsic activatability in vivo, likely impeded by the prevailing inflammatory tissue milieu. Importantly, IL-6 supplementation strongly enhanced the growth capability of pituitary stem cell organoids, thereby expanding their potential as an experimental model. Our study identifies IL-6 as a pituitary stem cell activator upon local damage, a competence quenched at aging, concomitant with raised IL-6/inflammatory levels in the older gland. These insights may open the way to interfering with pituitary aging.
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Affiliation(s)
- Annelies Vennekens
- Laboratory of Tissue Plasticity in Health and Disease, Cluster of Stem Cell and Developmental Biology, Department of Development and Regeneration, Leuven Stem Cell Institute, Katholieke Universiteit Leuven, 3000 Leuven, Belgium
| | - Emma Laporte
- Laboratory of Tissue Plasticity in Health and Disease, Cluster of Stem Cell and Developmental Biology, Department of Development and Regeneration, Leuven Stem Cell Institute, Katholieke Universiteit Leuven, 3000 Leuven, Belgium
| | - Florian Hermans
- Laboratory of Tissue Plasticity in Health and Disease, Cluster of Stem Cell and Developmental Biology, Department of Development and Regeneration, Leuven Stem Cell Institute, Katholieke Universiteit Leuven, 3000 Leuven, Belgium
- Laboratory of Morphology, Biomedical Research Institute, Hasselt University, 3590 Diepenbeek, Belgium
| | - Benoit Cox
- Laboratory of Tissue Plasticity in Health and Disease, Cluster of Stem Cell and Developmental Biology, Department of Development and Regeneration, Leuven Stem Cell Institute, Katholieke Universiteit Leuven, 3000 Leuven, Belgium
| | - Elodie Modave
- Center for Cancer Biology, Vlaams Instituut voor Biotechnologie, 3000 Leuven, Belgium
- Laboratory for Intestinal Neuroimmune Interactions, Translational Research Center for Gastrointestinal Disorders, Department of Chronic Diseases, Metabolism and Ageing, Katholieke Universiteit Leuven, 3000 Leuven, Belgium
| | - Adrian Janiszewski
- Laboratory for Cellular Reprogramming and Epigenetic Regulation, Cluster of Stem Cell and Developmental Biology, Department of Development and Regeneration, Leuven Stem Cell Institute, Katholieke Universiteit Leuven, 3000 Leuven, Belgium
| | - Charlotte Nys
- Laboratory of Tissue Plasticity in Health and Disease, Cluster of Stem Cell and Developmental Biology, Department of Development and Regeneration, Leuven Stem Cell Institute, Katholieke Universiteit Leuven, 3000 Leuven, Belgium
| | - Hiroto Kobayashi
- Laboratory of Tissue Plasticity in Health and Disease, Cluster of Stem Cell and Developmental Biology, Department of Development and Regeneration, Leuven Stem Cell Institute, Katholieke Universiteit Leuven, 3000 Leuven, Belgium
- Department of Anatomy and Structural Science, Yamagata University Faculty of Medicine, Yamagata 990-9585, Japan
| | - Bert Malengier-Devlies
- Immunity and Inflammation Research Group, Department of Microbiology, Immunology and Transplantation, Katholieke Universiteit Leuven, 3000 Leuven, Belgium
| | - Joel Chappell
- Laboratory for Cellular Reprogramming and Epigenetic Regulation, Cluster of Stem Cell and Developmental Biology, Department of Development and Regeneration, Leuven Stem Cell Institute, Katholieke Universiteit Leuven, 3000 Leuven, Belgium
| | - Patrick Matthys
- Immunity and Inflammation Research Group, Department of Microbiology, Immunology and Transplantation, Katholieke Universiteit Leuven, 3000 Leuven, Belgium
| | - Marie-Isabelle Garcia
- Institut de Recherche Interdisciplinaire en Biologie Humaine et Moléculaire, Faculty of Medicine, Université Libre de Bruxelles, 1070 Bruxelles, Belgium
| | - Vincent Pasque
- Laboratory for Cellular Reprogramming and Epigenetic Regulation, Cluster of Stem Cell and Developmental Biology, Department of Development and Regeneration, Leuven Stem Cell Institute, Katholieke Universiteit Leuven, 3000 Leuven, Belgium
| | - Diether Lambrechts
- Center for Cancer Biology, Vlaams Instituut voor Biotechnologie, 3000 Leuven, Belgium
- Laboratory for Translational Genetics, Department of Human Genetics, Katholieke Universiteit Leuven, 3000 Leuven, Belgium
| | - Hugo Vankelecom
- Laboratory of Tissue Plasticity in Health and Disease, Cluster of Stem Cell and Developmental Biology, Department of Development and Regeneration, Leuven Stem Cell Institute, Katholieke Universiteit Leuven, 3000 Leuven, Belgium;
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Abstract
The pituitary gland harbors a population of stem cells. However, role and regulation of these cells remain poorly understood. We recently established organoids from mouse pituitary as a novel research tool to explore pituitary stem cell biology (Cox et al., J. Endocrinol. 2019; 240:287-308). In general, organoids represent 3D in vitro cell configurations that develop and self-organize from (single) tissue stem cells under well-defined culture conditions that typically mirror the stem cell niche and/or embryogenic processes. Organoids reliably recapitulate key aspects of the original organ, including of its stem cell compartment. Moreover, organoids are long-term expandable while retaining these properties. We demonstrated that pituitary organoids originate from the resident (SOX2+) stem cells, largely phenocopy these cells and retain the stemness phenotype during expansive culture. Interestingly, the organoids show confident in vivo translatability and, when developed from transgenically damaged gland, recapitulate the activation status of the stem cells as observed in situ following injury. Now, we found that the organoids also mirror the stem cells’ phenotype and biology in physiological conditions in which the stem cell compartment is either activated or compromised. Organoids from the neonatal maturing pituitary reproduce phenotypical and functional aspects of its activated stem cells, whereas organoids from aging gland mimic the declined functional state of the stem cells in old pituitary. Interestingly, this functional decay was found to be reverted during organoid culture, indicating that the old pituitary stem cells retain intrinsic functionality but are in vivo restrained by an obstructive microenvironment, not present in the organoid culture. Indeed, using single-cell transcriptomics and in vivo analysis, we found that the aging pituitary suffers from a prevailing inflammatory state (inflammaging) which appears to raise the threshold for stem cell activation. Interestingly, comparison of young and old pituitary led us to the discovery of pituitary stem cell activators. Finally, we found that activated parameters of organoid formation are also observed when tumorigenesis takes place in the gland, again mimicking the in situ stem cell activation that is occurring in this perturbed, pathological condition. Taken together, we identified, and applied, our new pituitary organoid model as advanced and powerful tool to gain profound insight into pituitary stem cell behavior across life and disease, which is expected to eventually translate into restorative and rejuvenative tactics when pituitary function is compromised by damage or age. In this context, our single-cell transcriptome database has strong potential to unveil appealing targets.
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Maenhoudt N, Defraye C, Boretto M, Jan Z, Heremans R, Boeckx B, Hermans F, Arijs I, Cox B, Van Nieuwenhuysen E, Vergote I, Van Rompuy AS, Lambrechts D, Timmerman D, Vankelecom H. Developing Organoids from Ovarian Cancer as Experimental and Preclinical Models. Stem Cell Reports 2020; 14:717-729. [PMID: 32243841 PMCID: PMC7160357 DOI: 10.1016/j.stemcr.2020.03.004] [Citation(s) in RCA: 90] [Impact Index Per Article: 22.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Revised: 03/03/2020] [Accepted: 03/03/2020] [Indexed: 12/13/2022] Open
Abstract
Ovarian cancer (OC) represents the most dismal gynecological cancer. Pathobiology is poorly understood, mainly due to lack of appropriate study models. Organoids, defined as self-developing three-dimensional in vitro reconstructions of tissues, provide powerful tools to model human diseases. Here, we established organoid cultures from patient-derived OC, in particular from the most prevalent high-grade serous OC (HGSOC). Testing multiple culture medium components identified neuregulin-1 (NRG1) as key factor in maximizing OC organoid development and growth, although overall derivation efficiency remained moderate (36% for HGSOC patients, 44% for all patients together). Established organoid lines showed patient tumor-dependent morphology and disease characteristics, and recapitulated the parent tumor's marker expression and mutational landscape. Moreover, the organoids displayed tumor-specific sensitivity to clinical HGSOC chemotherapeutic drugs. Patient-derived OC organoids provide powerful tools for the study of the cancer's pathobiology (such as importance of the NRG1/ERBB pathway) as well as advanced preclinical tools for (personalized) drug screening and discovery. Organoids are established from ovarian cancer (OC) Neuregulin-1 (NRG1) is identified as key component for OC organoid growth OC organoids capture disease hallmarks and recapitulate patient tumor characteristics OC organoids are amenable to drug screening and mechanistic (NRG1/ERBB) research
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Affiliation(s)
- Nina Maenhoudt
- Laboratory of Tissue Plasticity in Health and Disease, Cluster of Stem Cell and Developmental Biology, Department of Development and Regeneration, KU Leuven (University of Leuven), 3000 Leuven, Belgium
| | - Charlotte Defraye
- Laboratory of Tissue Plasticity in Health and Disease, Cluster of Stem Cell and Developmental Biology, Department of Development and Regeneration, KU Leuven (University of Leuven), 3000 Leuven, Belgium
| | - Matteo Boretto
- Laboratory of Tissue Plasticity in Health and Disease, Cluster of Stem Cell and Developmental Biology, Department of Development and Regeneration, KU Leuven (University of Leuven), 3000 Leuven, Belgium
| | - Ziga Jan
- Laboratory of Tissue Plasticity in Health and Disease, Cluster of Stem Cell and Developmental Biology, Department of Development and Regeneration, KU Leuven (University of Leuven), 3000 Leuven, Belgium; Cluster Woman and Child, Department of Development and Regeneration, KU Leuven, 3000 Leuven, Belgium; Cancer Centre Carinthia, 9020 Klagenfurt, Austria
| | - Ruben Heremans
- Laboratory of Tissue Plasticity in Health and Disease, Cluster of Stem Cell and Developmental Biology, Department of Development and Regeneration, KU Leuven (University of Leuven), 3000 Leuven, Belgium; Cluster Woman and Child, Department of Development and Regeneration, KU Leuven, 3000 Leuven, Belgium; Gynecology and Obstetrics, University Hospitals Leuven (UZ Leuven), 3000 Leuven, Belgium
| | - Bram Boeckx
- Center for Cancer Biology, VIB, 3000 Leuven, Belgium; Laboratory for Translational Genetics, Department of Human Genetics, KU Leuven, 3000 Leuven, Belgium
| | - Florian Hermans
- Laboratory of Tissue Plasticity in Health and Disease, Cluster of Stem Cell and Developmental Biology, Department of Development and Regeneration, KU Leuven (University of Leuven), 3000 Leuven, Belgium; Department of Morphology, Biomedical Research Institute, Faculty of Medicine and Life Sciences, Hasselt University, 3590 Diepenbeek, Belgium
| | - Ingrid Arijs
- Center for Cancer Biology, VIB, 3000 Leuven, Belgium; Laboratory for Translational Genetics, Department of Human Genetics, KU Leuven, 3000 Leuven, Belgium
| | - Benoit Cox
- Laboratory of Tissue Plasticity in Health and Disease, Cluster of Stem Cell and Developmental Biology, Department of Development and Regeneration, KU Leuven (University of Leuven), 3000 Leuven, Belgium
| | - Els Van Nieuwenhuysen
- Cluster Woman and Child, Department of Development and Regeneration, KU Leuven, 3000 Leuven, Belgium; Gynecology and Obstetrics, University Hospitals Leuven (UZ Leuven), 3000 Leuven, Belgium
| | - Ignace Vergote
- Cluster Woman and Child, Department of Development and Regeneration, KU Leuven, 3000 Leuven, Belgium; Gynecology and Obstetrics, University Hospitals Leuven (UZ Leuven), 3000 Leuven, Belgium
| | - Anne-Sophie Van Rompuy
- Translational Cell & Tissue Research, Department of Imaging & Pathology, KU Leuven, 3000 Leuven, Belgium
| | - Diether Lambrechts
- Center for Cancer Biology, VIB, 3000 Leuven, Belgium; Laboratory for Translational Genetics, Department of Human Genetics, KU Leuven, 3000 Leuven, Belgium
| | - Dirk Timmerman
- Cluster Woman and Child, Department of Development and Regeneration, KU Leuven, 3000 Leuven, Belgium; Gynecology and Obstetrics, University Hospitals Leuven (UZ Leuven), 3000 Leuven, Belgium
| | - Hugo Vankelecom
- Laboratory of Tissue Plasticity in Health and Disease, Cluster of Stem Cell and Developmental Biology, Department of Development and Regeneration, KU Leuven (University of Leuven), 3000 Leuven, Belgium.
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Kindinger LM, Poon LC, Cacciatore S, MacIntyre DA, Fox NS, Schuit E, Mol BW, Liem S, Lim AC, Serra V, Perales A, Hermans F, Darzi A, Bennett P, Nicolaides KH, Teoh TG. The effect of gestational age and cervical length measurements in the prediction of spontaneous preterm birth in twin pregnancies: an individual patient level meta-analysis. BJOG 2015; 123:877-84. [PMID: 26333191 DOI: 10.1111/1471-0528.13575] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/22/2015] [Indexed: 11/27/2022]
Abstract
OBJECTIVE To assess the effect of gestational age (GA) and cervical length (CL) measurements at transvaginal ultrasound (TVUS) in the prediction of preterm birth in twin pregnancy. DESIGN Individual patient data (IPD) meta-analysis. SETTING International multicentre study. POPULATION Asymptomatic twin pregnancy. METHODS MEDLINE and EMBASE searches were performed and IPD obtained from authors of relevant studies. Multinomial logistic regression analysis determined probabilities for birth at ≤28(+0) , 28(+1) to 32(+0) , 32(+1) to 36(+0) , and ≥36(+1) weeks as a function of GA at screening and CL measurements. MAIN OUTCOME MEASURES Predicted probabilities for preterm birth at ≤28(+0) , 28(+1) to 32(+0) , and 32(+1) to 36(+0) . RESULTS A total of 6188 CL measurements were performed on 4409 twin pregnancies in 12 studies. Both GA at screening and CL had a significant and non-linear effect on GA at birth. The best prediction of birth at ≤28(+0) weeks was provided by screening at ≤18(+0) weeks (P < 0.001), whereas the best prediction of birth between 28(+1) and 36(+0) weeks was provided by screening at ≥24(+0) weeks (P < 0.001). Negative prediction value of 100% for birth at ≤28(+0) weeks is achieved at CL 65 mm and 43 mm at ultrasound GA at ≤18(+0) weeks and at 22(+1) to 24(+0) weeks, respectively. CONCLUSION In twin pregnancies, prediction of preterm birth depends on both CL and the GA at screening. When CL is <30 mm, screening at ≤18(+0) weeks is most predictive for birth at ≤28(+0) weeks. Later screening at >22(+0) weeks is most predictive of delivery at 28(+1) to 36(+0) weeks. In twins, we recommend CL screening in twins to commence from ≤18(+0) weeks. TWEETABLE ABSTRACT An individual patient meta-analysis assessing gestation and CL in the prediction of preterm birth in twins.
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Affiliation(s)
- L M Kindinger
- Institute of Reproductive and Developmental Biology, Imperial College London, London, UK.,Fetal Medicine Unit, St Mary's Hospital, Imperial College Healthcare NHS Trust, London, UK
| | - L C Poon
- Fetal Medicine Unit, St Mary's Hospital, Imperial College Healthcare NHS Trust, London, UK.,Harris Birthright Research Centre for Fetal Medicine, Kings College Hospital, London, UK
| | - S Cacciatore
- Institute of Reproductive and Developmental Biology, Imperial College London, London, UK
| | - D A MacIntyre
- Institute of Reproductive and Developmental Biology, Imperial College London, London, UK
| | - N S Fox
- Maternal Fetal Medicine Associates, PLLC, New York, NY, USA
| | - E Schuit
- Stanford Prevention Research Center, Stanford University, Stanford, CA, USA
| | - B W Mol
- The Robinson Research Institute, School of Paediatrics and Reproductive Health, University of Adelaide, Adelaide, SA, Australia
| | - S Liem
- Department of Obstetrics and Gynaecology, Academic Medical Centre, University of Amsterdam, Amsterdam, the Netherlands
| | - A C Lim
- Department of Obstetrics and Gynaecology, Academic Medical Centre, University of Amsterdam, Amsterdam, the Netherlands
| | - V Serra
- Maternal-Fetal Medicine Unit, Instituto Valenciano de Infertilidad, University of Valencia, Valencia, Spain
| | - A Perales
- Department of Paediatrics, Obstetrics and Gynaecology, La FE, University and Polytechnic Hospital, University of Valencia, Valencia, Spain
| | - F Hermans
- Department of Obstetrics and Gynaecology, Academic Medical Centre, University of Amsterdam, Amsterdam, the Netherlands
| | - A Darzi
- Department of Academic Surgery, St Marys Hospital, Imperial College Healthcare NHS Trust, London, UK
| | - P Bennett
- Institute of Reproductive and Developmental Biology, Imperial College London, London, UK
| | - K H Nicolaides
- Harris Birthright Research Centre for Fetal Medicine, Kings College Hospital, London, UK
| | - T G Teoh
- Fetal Medicine Unit, St Mary's Hospital, Imperial College Healthcare NHS Trust, London, UK
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Hermans F, Mattelaer P, De Jaegere T, Augustinus J, Van Mulders J, Verhaeghe L. Congenital uterine anomaly. J Belge Radiol 1993; 76:399. [PMID: 8163442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- F Hermans
- Dienst Radiologie, Algemeen Ziekenhuis St.-Lucas, Assebroek, Belgium
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Hermans F. [The long-term prognosis of hangman's fractures]. Ned Tijdschr Geneeskd 1990; 134:2112-3. [PMID: 2234193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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van Bergen B, Hermans F, Hollands L. [Leadership of managerial personnel in nursing]. Tijdschr Ziekenverpl 1976; 29:461-9. [PMID: 1046819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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