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Gonzalez H, Narasipura SD, Shull T, Shetty A, Teppen TL, Naqib A, Al-Harthi L. An Efficient and Cost-Effective Approach to Generate Functional Human Inducible Pluripotent Stem Cell-Derived Astrocytes. Cells 2023; 12:2357. [PMID: 37830571 PMCID: PMC10571578 DOI: 10.3390/cells12192357] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Revised: 09/11/2023] [Accepted: 09/16/2023] [Indexed: 10/14/2023] Open
Abstract
Human inducible pluripotent stem cell (hiPSC)-derived astrocytes (iAs) are critical to study astrocytes in health and disease. They provide several advantages over human fetal astrocytes in research, which include consistency, availability, disease modeling, customization, and ethical considerations. The generation of iAs is hampered by the requirement of Matrigel matrix coating for survival and proliferation. We provide a protocol demonstrating that human iAs cultured in the absence of Matrigel are viable and proliferative. Further, through a side-by-side comparison of cultures with and without Matrigel, we show significant similarities in astrocyte-specific profiling, including morphology (shape and structure), phenotype (cell-specific markers), genotype (transcriptional expression), metabolic (respiration), and functional aspects (glutamate uptake and cytokine response). In addition, we report that, unlike other CNS cell types, such as neuronal progenitor cells and neurons, iAs can withstand the absence of Matrigel coating. Our study demonstrates that Matrigel is dispensable for the culture of human iPSC-derived astrocytes, facilitating an easy, streamlined, and cost-effective method of generating these cells.
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Affiliation(s)
- Hemil Gonzalez
- Department of Internal Medicine, Division of Infectious Diseases, Rush University Medical Center, Chicago, IL 60612, USA
- Department of Microbial Pathogens and Immunity, Rush Medical College, Chicago, IL 60612, USA; (S.D.N.); (T.S.)
| | - Srinivas D. Narasipura
- Department of Microbial Pathogens and Immunity, Rush Medical College, Chicago, IL 60612, USA; (S.D.N.); (T.S.)
| | - Tanner Shull
- Department of Microbial Pathogens and Immunity, Rush Medical College, Chicago, IL 60612, USA; (S.D.N.); (T.S.)
- Division of Epidemiology and Biostatistics, School of Public Health, University of Illinois, Chicago, IL 60608, USA
| | - Amogh Shetty
- Illinois Mathematics and Science Academy, Aurora, IL 60506, USA
| | - Tara L. Teppen
- Molecular Neurobiology Division, Rush Alzheimer’s Disease Center, Rush University, Chicago, IL 60612, USA
| | - Ankur Naqib
- Genome Core Facility, Rush University, Chicago, IL 60612, USA;
| | - Lena Al-Harthi
- Department of Microbial Pathogens and Immunity, Rush Medical College, Chicago, IL 60612, USA; (S.D.N.); (T.S.)
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Wang Y, Zhang S, Lan Z, Doan V, Kim B, Liu S, Zhu M, Hull VL, Rihani S, Zhang CL, Gray JA, Guo F. SOX2 is essential for astrocyte maturation and its deletion leads to hyperactive behavior in mice. Cell Rep 2022; 41:111842. [PMID: 36543123 PMCID: PMC9875714 DOI: 10.1016/j.celrep.2022.111842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2021] [Revised: 09/23/2022] [Accepted: 11/24/2022] [Indexed: 12/24/2022] Open
Abstract
Children with SOX2 deficiency develop ocular disorders and extra-ocular CNS anomalies. Animal data show that SOX2 is essential for retinal and neural stem cell development. In the CNS parenchyma, SOX2 is primarily expressed in astroglial and oligodendroglial cells. Here, we report a crucial role of astroglial SOX2 in postnatal brain development. Astroglial Sox2-deficient mice develop hyperactivity in locomotion and increased neuronal excitability in the corticostriatal circuit. Sox2 deficiency inhibits postnatal astrocyte maturation molecularly, morphologically, and electrophysiologically without affecting astroglia proliferation. Mechanistically, SOX2 directly binds to a cohort of astrocytic signature and functional genes, the expression of which is significantly reduced in Sox2-deficient CNS and astrocytes. Consistently, Sox2 deficiency remarkably reduces glutamate transporter expression and compromised astrocyte function of glutamate uptake. Our study provides insights into the cellular mechanisms underlying brain defects in children with SOX2 mutations and suggests a link of astrocyte SOX2 with extra-ocular abnormalities in SOX2-mutant subjects.
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Affiliation(s)
- Yan Wang
- Institute for Pediatric Regenerative Medicine, Shriners Hospitals for Children Northern California, Sacramento, CA 95817, USA; Department of Neurology, School of Medicine, University of California, Davis, Davis, CA 95817, USA
| | - Sheng Zhang
- Institute for Pediatric Regenerative Medicine, Shriners Hospitals for Children Northern California, Sacramento, CA 95817, USA; Department of Neurology, School of Medicine, University of California, Davis, Davis, CA 95817, USA
| | - Zhaohui Lan
- Institute for Pediatric Regenerative Medicine, Shriners Hospitals for Children Northern California, Sacramento, CA 95817, USA; Department of Neurology, School of Medicine, University of California, Davis, Davis, CA 95817, USA
| | - Vui Doan
- Institute for Pediatric Regenerative Medicine, Shriners Hospitals for Children Northern California, Sacramento, CA 95817, USA
| | - Bokyung Kim
- Institute for Pediatric Regenerative Medicine, Shriners Hospitals for Children Northern California, Sacramento, CA 95817, USA; Department of Neurology, School of Medicine, University of California, Davis, Davis, CA 95817, USA
| | - Sihan Liu
- Institute for Pediatric Regenerative Medicine, Shriners Hospitals for Children Northern California, Sacramento, CA 95817, USA; Department of Neurology, School of Medicine, University of California, Davis, Davis, CA 95817, USA
| | - Meina Zhu
- Institute for Pediatric Regenerative Medicine, Shriners Hospitals for Children Northern California, Sacramento, CA 95817, USA; Department of Neurology, School of Medicine, University of California, Davis, Davis, CA 95817, USA
| | - Vanessa L Hull
- Institute for Pediatric Regenerative Medicine, Shriners Hospitals for Children Northern California, Sacramento, CA 95817, USA; Department of Neurology, School of Medicine, University of California, Davis, Davis, CA 95817, USA
| | - Sami Rihani
- Institute for Pediatric Regenerative Medicine, Shriners Hospitals for Children Northern California, Sacramento, CA 95817, USA; Department of Neurology, School of Medicine, University of California, Davis, Davis, CA 95817, USA
| | - Chun-Li Zhang
- Department of Molecular Biology and Hamon Center for Regenerative Science and Medicine, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - John A Gray
- Department of Neurology, School of Medicine, University of California, Davis, Davis, CA 95817, USA; Center for Neuroscience, University of California, Davis, Davis, CA 95618, USA
| | - Fuzheng Guo
- Institute for Pediatric Regenerative Medicine, Shriners Hospitals for Children Northern California, Sacramento, CA 95817, USA; Department of Neurology, School of Medicine, University of California, Davis, Davis, CA 95817, USA.
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Roboon J, Hattori T, Nguyen DT, Ishii H, Takarada-Iemata M, Kannon T, Hosomichi K, Maejima T, Saito K, Shinmyo Y, Mieda M, Tajima A, Kawasaki H, Hori O. Isolation of ferret astrocytes reveals their morphological, transcriptional, and functional differences from mouse astrocytes. Front Cell Neurosci 2022; 16:877131. [PMID: 36274991 PMCID: PMC9584309 DOI: 10.3389/fncel.2022.877131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Accepted: 09/13/2022] [Indexed: 11/13/2022] Open
Abstract
Astrocytes play key roles in supporting the central nervous system structure, regulating synaptic functions, and maintaining brain homeostasis. The number of astrocytes in the cerebrum has markedly increased through evolution. However, the manner by which astrocytes change their features during evolution remains unknown. Compared with the rodent brain, the brain of the ferret, a carnivorous animal, has a folded cerebral cortex and higher white to gray matter ratio, which are common features of the human brain. To further clarify the features of ferret astrocytes, we isolated astrocytes from ferret neonatal brains, cultured these cells, and compared their morphology, gene expression, calcium response, and proliferating ability with those of mouse astrocytes. The morphology of cultured ferret astrocytes differed from that of mouse astrocytes. Ferret astrocytes had longer and more branched processes, smaller cell bodies, and different calcium responses to glutamate, as well as had a greater ability to proliferate, compared to mouse astrocytes. RNA sequencing analysis revealed novel ferret astrocyte-specific genes, including several genes that were the same as those in humans. Astrocytes in the ferret brains had larger cell size, longer primary processes in larger numbers, and a higher proliferation rate compared to mouse astrocytes. Our study shows that cultured ferret astrocytes have different features from rodent astrocytes and similar features to human astrocytes, suggesting that they are useful in studying the roles of astrocytes in brain evolution and cognitive functions in higher animals.
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Affiliation(s)
- Jureepon Roboon
- Department of Neuroanatomy, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Japan
| | - Tsuyoshi Hattori
- Department of Neuroanatomy, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Japan
- *Correspondence: Tsuyoshi Hattori,
| | - Dinh Thi Nguyen
- Department of Neuroanatomy, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Japan
| | - Hiroshi Ishii
- Department of Neuroanatomy, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Japan
| | - Mika Takarada-Iemata
- Department of Neuroanatomy, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Japan
| | - Takayuki Kannon
- Department of Bioinformatics and Genomics, Graduate School of Advanced Preventive Medical Sciences, Kanazawa University, Kanazawa, Japan
| | - Kazuyoshi Hosomichi
- Department of Bioinformatics and Genomics, Graduate School of Advanced Preventive Medical Sciences, Kanazawa University, Kanazawa, Japan
| | - Takashi Maejima
- Department of Integrative Neurophysiology, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Japan
| | - Kengo Saito
- Department of Medical Neuroscience, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Japan
| | - Yohei Shinmyo
- Department of Medical Neuroscience, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Japan
| | - Michihiro Mieda
- Department of Integrative Neurophysiology, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Japan
| | - Atsushi Tajima
- Department of Bioinformatics and Genomics, Graduate School of Advanced Preventive Medical Sciences, Kanazawa University, Kanazawa, Japan
| | - Hiroshi Kawasaki
- Department of Medical Neuroscience, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Japan
| | - Osamu Hori
- Department of Neuroanatomy, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Japan
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Aleksandrova MA, Sukhinich KK. Astrocytes of the Brain: Retinue Plays the King. Russ J Dev Biol 2022. [DOI: 10.1134/s1062360422040026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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5
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Specification of CNS macrophage subsets occurs postnatally in defined niches. Nature 2022; 604:740-748. [PMID: 35444273 DOI: 10.1038/s41586-022-04596-2] [Citation(s) in RCA: 111] [Impact Index Per Article: 55.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Accepted: 02/28/2022] [Indexed: 02/08/2023]
Abstract
All tissue-resident macrophages of the central nervous system (CNS)-including parenchymal microglia, as well as CNS-associated macrophages (CAMs1) such as meningeal and perivascular macrophages2-7-are part of the CNS endogenous innate immune system that acts as the first line of defence during infections or trauma2,8-10. It has been suggested that microglia and all subsets of CAMs are derived from prenatal cellular sources in the yolk sac that were defined as early erythromyeloid progenitors11-15. However, the precise ontogenetic relationships, the underlying transcriptional programs and the molecular signals that drive the development of distinct CAM subsets in situ are poorly understood. Here we show, using fate-mapping systems, single-cell profiling and cell-specific mutants, that only meningeal macrophages and microglia share a common prenatal progenitor. By contrast, perivascular macrophages originate from perinatal meningeal macrophages only after birth in an integrin-dependent manner. The establishment of perivascular macrophages critically requires the presence of arterial vascular smooth muscle cells. Together, our data reveal a precisely timed process in distinct anatomical niches for the establishment of macrophage subsets in the CNS.
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Ohlig S, Clavreul S, Thorwirth M, Simon-Ebert T, Bocchi R, Ulbricht S, Kannayian N, Rossner M, Sirko S, Smialowski P, Fischer-Sternjak J, Götz M. Molecular diversity of diencephalic astrocytes reveals adult astrogenesis regulated by Smad4. EMBO J 2021; 40:e107532. [PMID: 34549820 PMCID: PMC8561644 DOI: 10.15252/embj.2020107532] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Revised: 08/09/2021] [Accepted: 08/19/2021] [Indexed: 12/16/2022] Open
Abstract
Astrocytes regulate brain‐wide functions and also show region‐specific differences, but little is known about how general and region‐specific functions are aligned at the single‐cell level. To explore this, we isolated adult mouse diencephalic astrocytes by ACSA‐2‐mediated magnetic‐activated cell sorting (MACS). Single‐cell RNA‐seq revealed 7 gene expression clusters of astrocytes, with 4 forming a supercluster. Within the supercluster, cells differed by gene expression related to ion homeostasis or metabolism, with the former sharing gene expression with other regions and the latter being restricted to specific regions. All clusters showed expression of proliferation‐related genes, and proliferation of diencephalic astrocytes was confirmed by immunostaining. Clonal analysis demonstrated low level of astrogenesis in the adult diencephalon, but not in cerebral cortex grey matter. This led to the identification of Smad4 as a key regulator of diencephalic astrocyte in vivo proliferation and in vitro neurosphere formation. Thus, astrocytes show diverse gene expression states related to distinct functions with some subsets being more widespread while others are more regionally restricted. However, all share low‐level proliferation revealing the novel concept of adult astrogenesis in the diencephalon.
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Affiliation(s)
- Stefanie Ohlig
- Biomedical Center (BMC), Division of Physiological Genomics, Faculty of Medicine, LMU Munich, Munich, Germany.,Helmholtz Zentrum Muenchen, German Research Center for Environmental Health (GmbH), Institute of Stem Cell Research, Neuherberg, Germany
| | - Solène Clavreul
- Biomedical Center (BMC), Division of Physiological Genomics, Faculty of Medicine, LMU Munich, Munich, Germany.,Helmholtz Zentrum Muenchen, German Research Center for Environmental Health (GmbH), Institute of Stem Cell Research, Neuherberg, Germany
| | - Manja Thorwirth
- Biomedical Center (BMC), Division of Physiological Genomics, Faculty of Medicine, LMU Munich, Munich, Germany.,Helmholtz Zentrum Muenchen, German Research Center for Environmental Health (GmbH), Institute of Stem Cell Research, Neuherberg, Germany
| | - Tatiana Simon-Ebert
- Biomedical Center (BMC), Division of Physiological Genomics, Faculty of Medicine, LMU Munich, Munich, Germany.,Helmholtz Zentrum Muenchen, German Research Center for Environmental Health (GmbH), Institute of Stem Cell Research, Neuherberg, Germany
| | - Riccardo Bocchi
- Biomedical Center (BMC), Division of Physiological Genomics, Faculty of Medicine, LMU Munich, Munich, Germany.,Helmholtz Zentrum Muenchen, German Research Center for Environmental Health (GmbH), Institute of Stem Cell Research, Neuherberg, Germany
| | - Sabine Ulbricht
- Biomedical Center (BMC), Division of Physiological Genomics, Faculty of Medicine, LMU Munich, Munich, Germany.,Helmholtz Zentrum Muenchen, German Research Center for Environmental Health (GmbH), Institute of Stem Cell Research, Neuherberg, Germany
| | - Nirmal Kannayian
- Molecular Neurobiology, Department of Psychiatry, LMU Munich, Munich, Germany
| | - Moritz Rossner
- Molecular Neurobiology, Department of Psychiatry, LMU Munich, Munich, Germany
| | - Swetlana Sirko
- Biomedical Center (BMC), Division of Physiological Genomics, Faculty of Medicine, LMU Munich, Munich, Germany.,Helmholtz Zentrum Muenchen, German Research Center for Environmental Health (GmbH), Institute of Stem Cell Research, Neuherberg, Germany
| | - Pawel Smialowski
- Biomedical Center (BMC), Division of Physiological Genomics, Faculty of Medicine, LMU Munich, Munich, Germany.,Helmholtz Zentrum Muenchen, German Research Center for Environmental Health (GmbH), Institute of Stem Cell Research, Neuherberg, Germany
| | - Judith Fischer-Sternjak
- Biomedical Center (BMC), Division of Physiological Genomics, Faculty of Medicine, LMU Munich, Munich, Germany.,Helmholtz Zentrum Muenchen, German Research Center for Environmental Health (GmbH), Institute of Stem Cell Research, Neuherberg, Germany
| | - Magdalena Götz
- Biomedical Center (BMC), Division of Physiological Genomics, Faculty of Medicine, LMU Munich, Munich, Germany.,Helmholtz Zentrum Muenchen, German Research Center for Environmental Health (GmbH), Institute of Stem Cell Research, Neuherberg, Germany.,SYNERGY, Excellence cluster of Systems Neurology, LMU Munich, Munich, Germany
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7
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Blank N, Mayer M, Mass E. The development and physiological and pathophysiological functions of resident macrophages and glial cells. Adv Immunol 2021; 151:1-47. [PMID: 34656287 DOI: 10.1016/bs.ai.2021.08.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
In the past, brain function and the onset and progression of neurological diseases have been studied in a neuron-centric manner. However, in recent years the focus of many neuroscientists has shifted to other cell types that promote neurodevelopment and contribute to the functionality of neuronal networks in health and disease. Particularly microglia and astrocytes have been implicated in actively contributing to and controlling neuronal development, neuroinflammation, and neurodegeneration. Here, we summarize the development of brain-resident macrophages and astrocytes and their core functions in the developing brain. We discuss their contribution and intercellular crosstalk during tissue homeostasis and pathophysiology. We argue that in-depth knowledge of non-neuronal cells in the brain could provide novel therapeutic targets to reverse or contain neurological diseases.
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Affiliation(s)
- Nelli Blank
- Developmental Biology of the Immune System, Life & Medical Sciences (LIMES) Institute, University of Bonn, Bonn, Germany.
| | - Marina Mayer
- Developmental Biology of the Immune System, Life & Medical Sciences (LIMES) Institute, University of Bonn, Bonn, Germany
| | - Elvira Mass
- Developmental Biology of the Immune System, Life & Medical Sciences (LIMES) Institute, University of Bonn, Bonn, Germany.
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ANALYSIS OF THE CORPUS CALLOSUM MYELOARCHITECTONICS OF MATURE PEOPLE. WORLD OF MEDICINE AND BIOLOGY 2021. [DOI: 10.26724/2079-8334-2021-3-77-189-193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Ren Z, Liu Y, Hong W, Pan X, Gong P, Liu Q, Zhou G, Qin S. Conditional knockout of leptin receptor in neural stem cells leads to obesity in mice and affects neuronal differentiation in the hypothalamus early after birth. Mol Brain 2020; 13:109. [PMID: 32746867 PMCID: PMC7398062 DOI: 10.1186/s13041-020-00647-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Accepted: 07/15/2020] [Indexed: 12/12/2022] Open
Abstract
Leptin, secreted by peripheral adipocytes, binds the leptin receptor (Lepr) in the hypothalamus, thereby contributing to the regulation of satiety and body weight. Lepr is expressed in the embryonic brain as early as embryonic day 12.5. However, the function of Lepr in neural precursor cells in the brain has not been resolved. To address this issue, we crossed the Leprflox/flox mice with each of Shh-Cre mice (Shh, sonic hedgehog) and Nestin (Nes)-Cre mice. We found that deletion of Lepr specifically in nestin-expressing cells led to extreme obesity, but the conditional null of Lepr in Shh-expressing cells had no obvious phenotype. Moreover, the level of leptin-activated pSTAT3 decreased in the anterior and central subregions of the arcuate hypothalamus of Shh-Cre; Leprflox/flox mice compared with the controls. By contrast, in Nes-Cre; Leprflox/flox mice, the level of leptin-activated pSTAT3 decreased in all subregions including the anterior, central, and posterior arcuate hypothalamus as well as the dorsomedial, ventromedial, and median eminence of the hypothalamus, revealing that the extensive lack of Lepr in the differentiated neurons of the hypothalamus in the conditional null mice. Notably, conditional deletion of Lepr in nestin-expressing cells enhanced the differentiation of neural precursor cells into neurons and oligodendroglia but inhibited differentiation into astrocytes early in postnatal development of hypothalamus. Our results suggest that Lepr expression in neural precursor cells is essential for maintaining normal body weight as well as the differentiation of neural precursor cells to the neural/glial fate in the hypothalamus shortly after birth.
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Affiliation(s)
- Zhonggan Ren
- Department of Anatomy, Histology and Embryology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, China
| | - Yitong Liu
- Department of Anatomy, Histology and Embryology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, China
| | - Wentong Hong
- Department of Anatomy, Histology and Embryology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, China
| | - Xinjie Pan
- Department of Anatomy, Histology and Embryology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, China
| | - Pifang Gong
- Department of Anatomy, Histology and Embryology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, China
| | - Qiong Liu
- Department of Anatomy, Histology and Embryology, School of Basic Medical Sciences, Fudan University, Shanghai, China;, Key Laboratory of Medical Imaging Computing and Computer Assisted Intervention of Shanghai, Shanghai, 200032, China
| | - Guomin Zhou
- Department of Anatomy, Histology and Embryology, School of Basic Medical Sciences, Fudan University, Shanghai, China;, Key Laboratory of Medical Imaging Computing and Computer Assisted Intervention of Shanghai, Shanghai, 200032, China
| | - Song Qin
- Department of Anatomy, Histology and Embryology, School of Basic Medical Sciences, Fudan University, Shanghai, China;, Key Laboratory of Medical Imaging Computing and Computer Assisted Intervention of Shanghai, Shanghai, 200032, China.
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