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Blain R, Couly G, Shotar E, Blévinal J, Toupin M, Favre A, Abjaghou A, Inoue M, Hernández-Garzón E, Clarençon F, Chalmel F, Mazaud-Guittot S, Giacobini P, Gitton Y, Chédotal A. A tridimensional atlas of the developing human head. Cell 2023; 186:5910-5924.e17. [PMID: 38070509 PMCID: PMC10783631 DOI: 10.1016/j.cell.2023.11.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Revised: 10/01/2023] [Accepted: 11/09/2023] [Indexed: 12/24/2023]
Abstract
The evolution and development of the head have long captivated researchers due to the crucial role of the head as the gateway for sensory stimuli and the intricate structural complexity of the head. Although significant progress has been made in understanding head development in various vertebrate species, our knowledge of early human head ontogeny remains limited. Here, we used advanced whole-mount immunostaining and 3D imaging techniques to generate a comprehensive 3D cellular atlas of human head embryogenesis. We present detailed developmental series of diverse head tissues and cell types, including muscles, vasculature, cartilage, peripheral nerves, and exocrine glands. These datasets, accessible through a dedicated web interface, provide insights into human embryogenesis. We offer perspectives on the branching morphogenesis of human exocrine glands and unknown features of the development of neurovascular and skeletomuscular structures. These insights into human embryology have important implications for understanding craniofacial defects and neurological disorders and advancing diagnostic and therapeutic strategies.
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Affiliation(s)
- Raphael Blain
- Sorbonne Université, INSERM, CNRS, Institut de la Vision, Paris, France
| | - Gérard Couly
- Sorbonne Université, INSERM, CNRS, Institut de la Vision, Paris, France
| | - Eimad Shotar
- Sorbonne Université, INSERM, CNRS, Institut de la Vision, Paris, France; Department of Interventional Neuroradiology, Pitié-Salpêtrière Hospital, Sorbonne Université, Paris, France
| | | | - Maryne Toupin
- INSERM, EHESP, Univ Rennes, Institut de recherche en santé, environnement et travail (Irset), UMR_S 1085, Rennes, France
| | - Anais Favre
- Sorbonne Université, INSERM, CNRS, Institut de la Vision, Paris, France
| | - Ali Abjaghou
- Sorbonne Université, INSERM, CNRS, Institut de la Vision, Paris, France
| | - Megumi Inoue
- Sorbonne Université, INSERM, CNRS, Institut de la Vision, Paris, France
| | | | - Frédéric Clarençon
- Department of Interventional Neuroradiology, Pitié-Salpêtrière Hospital, Sorbonne Université, Paris, France
| | - Frédéric Chalmel
- INSERM, EHESP, Univ Rennes, Institut de recherche en santé, environnement et travail (Irset), UMR_S 1085, Rennes, France
| | - Séverine Mazaud-Guittot
- INSERM, EHESP, Univ Rennes, Institut de recherche en santé, environnement et travail (Irset), UMR_S 1085, Rennes, France
| | - Paolo Giacobini
- University of Lille, INSERM, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, 59000 Lille, France
| | - Yorick Gitton
- Sorbonne Université, INSERM, CNRS, Institut de la Vision, Paris, France.
| | - Alain Chédotal
- Sorbonne Université, INSERM, CNRS, Institut de la Vision, Paris, France; Institut de pathologie, Groupe Hospitalier Est, Hospices Civils de Lyon, Lyon, France; University Claude Bernard Lyon 1, MeLiS, CNRS UMR 5284, INSERM U1314, 69008 Lyon, France.
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2
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Rattner A, Heng JS, Winer BL, Goff LA, Nathans J. Normal and Sjogren's syndrome models of the murine lacrimal gland studied at single-cell resolution. Proc Natl Acad Sci U S A 2023; 120:e2311983120. [PMID: 37812717 PMCID: PMC10589653 DOI: 10.1073/pnas.2311983120] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Accepted: 08/28/2023] [Indexed: 10/11/2023] Open
Abstract
The lacrimal gland is of central interest in ophthalmology both as the source of the aqueous component of tear fluid and as the site of autoimmune pathology in the context of Sjogren's syndrome (SjS). To provide a foundational description of mouse lacrimal gland cell types and their patterns of gene expression, we have analyzed single-cell transcriptomes from wild-type (Balb/c) mice and from two genetically based SjS models, MRL/lpr and NOD (nonobese diabetic).H2b, and defined the localization of multiple cell-type-specific protein and mRNA markers. This analysis has uncovered a previously undescribed cell type, Car6+ cells, which are located at the junction of the acini and the connecting ducts. More than a dozen secreted polypeptides that are likely to be components of tear fluid are expressed by acinar cells and show pronounced sex differences in expression. Additional examples of gene expression heterogeneity within a single cell type were identified, including a gradient of Claudin4 along the length of the ductal system and cell-to-cell heterogeneity in transcription factor expression within acinar and myoepithelial cells. The patterns of expression of channels, transporters, and pumps in acinar, Car6+, and ductal cells make strong predictions regarding the mechanisms of water and electrolyte secretion. In MRL/lpr and NOD.H2b lacrimal glands, distinctive changes in parenchymal gene expression and in immune cell subsets reveal widespread interferon responses, a T cell-dominated infiltrate in the MRL/lpr model, and a mixed B cell and T cell infiltrate in the NOD.H2b model.
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Affiliation(s)
- Amir Rattner
- Department of Molecular Biology and Genetics, Johns Hopkins University School of Medicine, Baltimore, MD21205
- HHMI, Johns Hopkins University School of Medicine, Baltimore, MD21205
| | - Jacob S. Heng
- Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD21205
| | - Briana L. Winer
- Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD21205
- Department of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, MD21205
| | - Loyal A. Goff
- Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD21205
- Department of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, MD21205
- Kavli Neurodiscovery Institute, Baltimore, MD21205
| | - Jeremy Nathans
- Department of Molecular Biology and Genetics, Johns Hopkins University School of Medicine, Baltimore, MD21205
- HHMI, Johns Hopkins University School of Medicine, Baltimore, MD21205
- Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD21205
- Wilmer Eye Institute, Baltimore, MD21205
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3
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Tchegnon E, Liao CP, Ghotbi E, Shipman T, Wang Y, McKay RM, Le LQ. Epithelial stem cell homeostasis in Meibomian gland development, dysfunction, and dry eye disease. JCI Insight 2021; 6:e151078. [PMID: 34499624 PMCID: PMC8564894 DOI: 10.1172/jci.insight.151078] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Accepted: 09/08/2021] [Indexed: 11/17/2022] Open
Abstract
Dry eye disease affects over 16 million adults in the US, and the majority of cases are due to Meibomian gland dysfunction. Unfortunately, the identity of the stem cells involved in Meibomian gland development and homeostasis is not well elucidated. Here, we report that loss of Krox20, a zinc finger transcription factor involved in the development of ectoderm-derived tissues, or deletion of KROX20-expressing epithelial cells disrupted Meibomian gland formation and homeostasis, leading to dry eye disease secondary to Meibomian gland dysfunction. Ablation of Krox20-lineage cells in adult mice also resulted in dry eye disease, implicating Krox20 in homeostasis of the mature Meibomian gland. Lineage-tracing and expression analyses revealed a restricted KROX20 expression pattern in the ductal areas of the Meibomian gland, although Krox20-lineage cells generate the full, mature Meibomian gland. This suggests that KROX20 marks a stem/progenitor cell population that differentiates to generate the entire Meibomian gland. Our Krox20 mouse models provide a powerful system that delineated the identity of stem cells required for Meibomian gland development and homeostasis and can be used to investigate the factors underlying these processes. They are also robust models of Meibomian gland dysfunction-related dry eye disease, with a potential for use in preclinical therapeutic screening.
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Affiliation(s)
- Edem Tchegnon
- Department of Dermatology and.,Genetics, Development and Disease Graduate Program, University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Chung-Ping Liao
- Department of Dermatology and.,Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | | | | | | | | | - Lu Q Le
- Department of Dermatology and.,Genetics, Development and Disease Graduate Program, University of Texas Southwestern Medical Center, Dallas, Texas, USA.,Hamon Center for Regenerative Science and Medicine.,Simmons Comprehensive Cancer Center, and.,O'Donnell Brain Institute, University of Texas Southwestern Medical Center, Dallas, Texas, USA
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4
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Park JW, Piknova B, Jenkins A, Hellinga D, Parver LM, Schechter AN. Potential roles of nitrate and nitrite in nitric oxide metabolism in the eye. Sci Rep 2020; 10:13166. [PMID: 32759980 PMCID: PMC7406513 DOI: 10.1038/s41598-020-69272-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Accepted: 06/29/2020] [Indexed: 02/07/2023] Open
Abstract
Nitric oxide (NO) signaling has been studied in the eye, including in the pathophysiology of some eye diseases. While NO production by nitric oxide synthase (NOS) enzymes in the eye has been characterized, the more recently described pathways of NO generation by nitrate (NO3-) and nitrite (NO2-) ions reduction has received much less attention. To elucidate the potential roles of these pathways, we analyzed nitrate and nitrite levels in components of the eye and lacrimal glands, primarily in porcine samples. Nitrate and nitrite levels were higher in cornea than in other eye parts, while lens contained the least amounts. Lacrimal glands exhibited much higher levels of both ions compared to other organs, such as liver and skeletal muscle, and even to salivary glands which are known to concentrate these ions. Western blotting showed expression of sialin, a known nitrate transporter, in the lacrimal glands and other eye components, and also xanthine oxidoreductase, a nitrate and nitrite reductase, in cornea and sclera. Cornea and sclera homogenates possessed a measurable amount of nitrate reduction activity. These results suggest that nitrate ions are concentrated in the lacrimal glands by sialin and can be secreted into eye components via tears and then reduced to nitrite and NO, thereby being an important source of NO in the eye.
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Affiliation(s)
- Ji Won Park
- Molecular Medicine Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, 10 Center Drive, 9N314, Bethesda, MD, 20892, USA
| | - Barbora Piknova
- Molecular Medicine Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, 10 Center Drive, 9N314, Bethesda, MD, 20892, USA
| | | | | | - Leonard M Parver
- Department of Ophthalmology, MedStar Georgetown University Hospital, Washington, DC, USA
| | - Alan N Schechter
- Molecular Medicine Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, 10 Center Drive, 9N314, Bethesda, MD, 20892, USA.
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Kuony A, Ikkala K, Kalha S, Magalhães AC, Pirttiniemi A, Michon F. Ectodysplasin-A signaling is a key integrator in the lacrimal gland-cornea feedback loop. Development 2019; 146:dev.176693. [PMID: 31221639 DOI: 10.1242/dev.176693] [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: 02/10/2019] [Accepted: 06/17/2019] [Indexed: 01/26/2023]
Abstract
A lack of ectodysplasin-A (Eda) signaling leads to dry eye symptoms, which have so far only been associated with altered Meibomian glands. Here, we used loss-of-function (Eda -/-) mutant mice to unravel the impact of Eda signaling on lacrimal gland formation, maturation and subsequent physiological function. Our study demonstrates that Eda activity is dispensable during lacrimal gland embryonic development. However, using a transcriptomic approach, we show that the Eda pathway is necessary for proper cell terminal differentiation in lacrimal gland epithelium and correlated with modified expression of secreted factors commonly found in the tear film. Finally, we discovered that lacrimal glands present a bilateral reduction of Eda signaling activity in response to unilateral corneal injury. This observation hints towards a role for the Eda pathway in controlling the switch from basal to reflex tears, to support corneal wound healing. Collectively, our data suggest a crucial implication of Eda signaling in the cornea-lacrimal gland feedback loop, both in physiological and pathophysiological conditions. Our findings demonstrate that Eda downstream targets could help alleviate dry eye symptoms.
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Affiliation(s)
- Alison Kuony
- Institute of Biotechnology, Helsinki Institute of Life Science, Developmental Biology Program, University of Helsinki, 00790 Helsinki, Finland.,Institut Jacques Monod, Université Denis Diderot - Paris 7, CNRS UMR 7592, Buffon building, 15 rue Hélène Brion, 75205 Paris Cedex 13, France
| | - Kaisa Ikkala
- Institute of Biotechnology, Helsinki Institute of Life Science, Developmental Biology Program, University of Helsinki, 00790 Helsinki, Finland
| | - Solja Kalha
- Institute of Biotechnology, Helsinki Institute of Life Science, Developmental Biology Program, University of Helsinki, 00790 Helsinki, Finland
| | - Ana Cathia Magalhães
- Institute of Biotechnology, Helsinki Institute of Life Science, Developmental Biology Program, University of Helsinki, 00790 Helsinki, Finland.,Institute for Neurosciences of Montpellier, INSERM UMR1051, University of Montpellier, 34295 Montpellier, France
| | - Anniina Pirttiniemi
- Institute of Biotechnology, Helsinki Institute of Life Science, Developmental Biology Program, University of Helsinki, 00790 Helsinki, Finland
| | - Frederic Michon
- Institute of Biotechnology, Helsinki Institute of Life Science, Developmental Biology Program, University of Helsinki, 00790 Helsinki, Finland .,Institute for Neurosciences of Montpellier, INSERM UMR1051, University of Montpellier, 34295 Montpellier, France
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