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Mosa MH, Nicolle O, Maschalidi S, Sepulveda FE, Bidaud-Meynard A, Menche C, Michels BE, Michaux G, de Saint Basile G, Farin HF. Dynamic Formation of Microvillus Inclusions During Enterocyte Differentiation in Munc18-2-Deficient Intestinal Organoids. Cell Mol Gastroenterol Hepatol 2018; 6:477-493.e1. [PMID: 30364784 PMCID: PMC6198061 DOI: 10.1016/j.jcmgh.2018.08.001] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/22/2017] [Accepted: 08/02/2018] [Indexed: 12/25/2022]
Abstract
BACKGROUND & AIMS Microvillus inclusion disease (MVID) is a congenital intestinal malabsorption disorder caused by defective apical vesicular transport. Existing cellular models do not fully recapitulate this heterogeneous pathology. The aim of this study was to characterize 3-dimensional intestinal organoids that continuously generate polarized absorptive cells as an accessible and relevant model to investigate MVID. METHODS Intestinal organoids from Munc18-2/Stxbp2-null mice that are deficient for apical vesicular transport were subjected to enterocyte-specific differentiation protocols. Lentiviral rescue experiments were performed using human MUNC18-2 variants. Apical trafficking and microvillus formation were characterized by confocal and transmission electron microscopy. Spinning disc time-lapse microscopy was used to document the lifecycle of microvillus inclusions. RESULTS Loss of Munc18-2/Stxbp2 recapitulated the pathologic features observed in patients with MUNC18-2 deficiency. The defects were fully restored by transgenic wild-type human MUNC18-2 protein, but not the patient variant (P477L). Importantly, we discovered that the MVID phenotype was correlated with the degree of enterocyte differentiation: secretory vesicles accumulated already in crypt progenitors, while differentiated enterocytes showed an apical tubulovesicular network and enlarged lysosomes. Upon prolonged enterocyte differentiation, cytoplasmic F-actin-positive foci were observed that further progressed into classic microvillus inclusions. Time-lapse microscopy showed their dynamic formation by intracellular maturation or invagination of the apical or basolateral plasma membrane. CONCLUSIONS We show that prolonged enterocyte-specific differentiation is required to recapitulate the entire spectrum of MVID. Primary organoids can provide a powerful model for this heterogeneous pathology. Formation of microvillus inclusions from multiple membrane sources showed an unexpected dynamic of the enterocyte brush border.
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Key Words
- 3D, 3-dimensional
- Apical Vesicular Transport
- Brush Border Formation
- DAPI, 4′,6-diamidino-2-phenylindole
- Disease Modeling
- EGFP, enhanced green fluorescent protein
- FHL5, familial hemophagocytic lymphohistiocytosis type 5
- IWP-2, inhibitor of WNT production-2
- KO, knock-out
- MVID, microvillus inclusion disease
- MVIs, microvillus inclusions
- Microvillus Atrophy
- PBS, phosphate-buffered saline
- STXBP2, syntaxin binding protein 2
- Stx3, syntaxin 3
- TEM, transmission electron microscopy
- VPA, valproic acid
- WT, wild-type
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Affiliation(s)
- Mohammed H. Mosa
- German Cancer Consortium (Deutsches Konsortium für Translationale Krebsforschung), Heidelberg, Germany,Georg-Speyer-Haus, Institute for Tumor Biology and Experimental Therapy, Frankfurt am Main, Germany,German Cancer Research Center (Deutsches Krebsforschungszentrum), Heidelberg, Germany
| | - Ophélie Nicolle
- University Rennes, Centre national de la recherche scientifique, Institut de Génétique et Développement de Rennes UMR6290, Rennes, France
| | - Sophia Maschalidi
- INSERM UMR1163, Laboratory of Normal and Pathological Homeostasis of the Immune System, Paris, France,Imagine Institute, Paris Descartes University–Sorbonne Paris Cité, Paris, France
| | - Fernando E. Sepulveda
- INSERM UMR1163, Laboratory of Normal and Pathological Homeostasis of the Immune System, Paris, France,Imagine Institute, Paris Descartes University–Sorbonne Paris Cité, Paris, France
| | - Aurelien Bidaud-Meynard
- University Rennes, Centre national de la recherche scientifique, Institut de Génétique et Développement de Rennes UMR6290, Rennes, France
| | - Constantin Menche
- Georg-Speyer-Haus, Institute for Tumor Biology and Experimental Therapy, Frankfurt am Main, Germany
| | - Birgitta E. Michels
- German Cancer Consortium (Deutsches Konsortium für Translationale Krebsforschung), Heidelberg, Germany,Georg-Speyer-Haus, Institute for Tumor Biology and Experimental Therapy, Frankfurt am Main, Germany,German Cancer Research Center (Deutsches Krebsforschungszentrum), Heidelberg, Germany,Faculty of Biological Sciences, Goethe University Frankfurt, Germany
| | - Grégoire Michaux
- University Rennes, Centre national de la recherche scientifique, Institut de Génétique et Développement de Rennes UMR6290, Rennes, France,Correspondence Address correspondence to: Grégoire Michaux, PhD, University Rennes, Institut de Génétique et Développement de Rennes, Rennes, France.
| | - Geneviève de Saint Basile
- INSERM UMR1163, Laboratory of Normal and Pathological Homeostasis of the Immune System, Paris, France,Imagine Institute, Paris Descartes University–Sorbonne Paris Cité, Paris, France,Centre d’Etudes des Déficites Immunitaires, Assistance Publique-Hôpitaux de Paris, France,Geneviève de Saint Basile, MD, PhD, INSERM, Paris, France.
| | - Henner F. Farin
- German Cancer Consortium (Deutsches Konsortium für Translationale Krebsforschung), Heidelberg, Germany,Georg-Speyer-Haus, Institute for Tumor Biology and Experimental Therapy, Frankfurt am Main, Germany,German Cancer Research Center (Deutsches Krebsforschungszentrum), Heidelberg, Germany,Henner F. Farin, PhD, Institute for Tumor Biology and Experimental Therapy, Frankfurt am Main, Germany.
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