1
|
Sedas Perez S, McQueen C, Stainton H, Pickering J, Chinnaiya K, Saiz-Lopez P, Placzek M, Ros MA, Towers M. Fgf signalling triggers an intrinsic mesodermal timer that determines the duration of limb patterning. Nat Commun 2023; 14:5841. [PMID: 37730682 PMCID: PMC10511490 DOI: 10.1038/s41467-023-41457-6] [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: 02/22/2023] [Accepted: 09/05/2023] [Indexed: 09/22/2023] Open
Abstract
Complex signalling between the apical ectodermal ridge (AER - a thickening of the distal epithelium) and the mesoderm controls limb patterning along the proximo-distal axis (humerus to digits). However, the essential in vivo requirement for AER-Fgf signalling makes it difficult to understand the exact roles that it fulfils. To overcome this barrier, we developed an amenable ex vivo chick wing tissue explant system that faithfully replicates in vivo parameters. Using inhibition experiments and RNA-sequencing, we identify a transient role for Fgfs in triggering the distal patterning phase. Fgfs are then dispensable for the maintenance of an intrinsic mesodermal transcriptome, which controls proliferation/differentiation timing and the duration of patterning. We also uncover additional roles for Fgf signalling in maintaining AER-related gene expression and in suppressing myogenesis. We describe a simple logic for limb patterning duration, which is potentially applicable to other systems, including the main body axis.
Collapse
Affiliation(s)
- Sofia Sedas Perez
- School of Biosciences, University of Sheffield, Western Bank, Sheffield, S10 2TN, UK
| | - Caitlin McQueen
- School of Biosciences, University of Sheffield, Western Bank, Sheffield, S10 2TN, UK
- Chester Medical School, Chester, CH2 1BR, UK
| | - Holly Stainton
- School of Biosciences, University of Sheffield, Western Bank, Sheffield, S10 2TN, UK
| | - Joseph Pickering
- School of Biosciences, University of Sheffield, Western Bank, Sheffield, S10 2TN, UK
| | - Kavitha Chinnaiya
- School of Biosciences, University of Sheffield, Western Bank, Sheffield, S10 2TN, UK
| | - Patricia Saiz-Lopez
- Instituto de Biomedicina y Biotecnología de Cantabria, IBBTEC (CSIC-Universidad de Cantabria), 39011, Santander, Spain
- Departamento de Anatomía y Biología Celular Facultad de Medicina, Universidad de Cantabria, 39011, Santander, Spain
| | - Marysia Placzek
- School of Biosciences, University of Sheffield, Western Bank, Sheffield, S10 2TN, UK
| | - Maria A Ros
- Instituto de Biomedicina y Biotecnología de Cantabria, IBBTEC (CSIC-Universidad de Cantabria), 39011, Santander, Spain
- Departamento de Anatomía y Biología Celular Facultad de Medicina, Universidad de Cantabria, 39011, Santander, Spain
| | - Matthew Towers
- School of Biosciences, University of Sheffield, Western Bank, Sheffield, S10 2TN, UK.
| |
Collapse
|
2
|
Solini GE, Pownall ME, Hillenbrand MJ, Tocheny CE, Paudel S, Halleran AD, Bianchi CH, Huyck RW, Saha MS. Xenopus embryos show a compensatory response following perturbation of the Notch signaling pathway. Dev Biol 2020; 460:99-107. [PMID: 31899211 PMCID: PMC7263880 DOI: 10.1016/j.ydbio.2019.12.016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Revised: 12/03/2019] [Accepted: 12/24/2019] [Indexed: 11/09/2022]
Abstract
As an essential feature of development, robustness ensures that embryos attain a consistent phenotype despite genetic and environmental variation. The growing number of examples demonstrating that embryos can mount a compensatory response to germline mutations in key developmental genes has heightened interest in the phenomenon of embryonic robustness. While considerable progress has been made in elucidating genetic compensation in response to germline mutations, the diversity, mechanisms, and limitations of embryonic robustness remain unclear. In this work, we have examined whether Xenopus laevis embryos are able to compensate for perturbations of the Notch signaling pathway induced by RNA injection constructs that either upregulate or inhibit this signaling pathway. Consistent with earlier studies, we found that at neurula stages, hyperactivation of the Notch pathway inhibited neural differentiation while inhibition of Notch signaling increases premature differentiation as assayed by neural beta tubulin expression. However, surprisingly, by hatching stages, embryos begin to compensate for these perturbations, and by swimming tadpole stages most embryos exhibited normal neuronal gene expression. Using cell proliferation and TUNEL assays, we show that the compensatory response is, in part, mediated by modulating levels of cell proliferation and apoptosis. This work provides an additional model for addressing the mechanisms of embryonic robustness and of genetic compensation.
Collapse
Affiliation(s)
- Grace E Solini
- Department of Biology, College of William and Mary, Williamsburg, VA, 23185, USA
| | - Mark E Pownall
- Department of Biology, College of William and Mary, Williamsburg, VA, 23185, USA
| | - Molly J Hillenbrand
- Department of Biology, College of William and Mary, Williamsburg, VA, 23185, USA
| | - Claire E Tocheny
- Department of Biology, College of William and Mary, Williamsburg, VA, 23185, USA
| | - Sudip Paudel
- Department of Biology, College of William and Mary, Williamsburg, VA, 23185, USA
| | - Andrew D Halleran
- Department of Biology, College of William and Mary, Williamsburg, VA, 23185, USA
| | - Catherine H Bianchi
- Department of Biology, College of William and Mary, Williamsburg, VA, 23185, USA
| | - Ryan W Huyck
- Department of Biology, College of William and Mary, Williamsburg, VA, 23185, USA
| | - Margaret S Saha
- Department of Biology, College of William and Mary, Williamsburg, VA, 23185, USA.
| |
Collapse
|
3
|
Siddique AI, Mani V, Renganathan S, Ayyanar R, Nagappan A, Namasivayam N. Asiatic acid abridges pre-neoplastic lesions, inflammation, cell proliferation and induces apoptosis in a rat model of colon carcinogenesis. Chem Biol Interact 2017; 278:197-211. [PMID: 29108773 DOI: 10.1016/j.cbi.2017.10.024] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Revised: 10/11/2017] [Accepted: 10/30/2017] [Indexed: 01/06/2023]
Abstract
The utmost aim of this present study was to investigate the anti-inflammatory, antiproliferative and proapoptotic potential of Asiatic acid (AA) on 1,2-dimethylhydrazine (DMH)-induced colon carcinogenesis in experimental rats. Rats were divided into six groups and received modified pellet diet for 32 weeks. Group 1 served as control rats. Group 2 received AA (4 mg/kg b.w. p.o.). Group 3-6 rats received 15 DMH (20 mg/kg b.w., s.c.) injections once a week starting from the 4th week. Besides DMH, rats received AA (4 mg/kg b.w. p.o.) in group 4 starting 2 weeks before carcinogen treatment till the end of the last DMH; group 5 starting 2 days after last DMH till the end of the experiment; and group 6 throughout the experiment. Pre-neoplastic lesions, xenobiotic metabolizing enzymes, inflammation, cell proliferation and apoptotic markers were analysed in our study. Our results ascertained AA supplementation to DMH-exposed rats significantly decreased the incidence of aberrant crypt foci (ACF) and phase I xenobiotic enzymes; and increased the phase II xenobiotic enzymes and mucin content as compared to DMH-alone-exposed rats. Moreover the increased expressions of mast cells, argyrophilic nucleolar organizer regions (AgNORs), proliferating cell nuclear antigen (PCNA) and cyclin D1 observed in the DMH-alone-exposed rats were reverted and were comparable with those of the control rats, when treated with AA. Concordantly AA also induced apoptosis by downregulating the expression of Bcl-2 and upregulating Bax, cytochrome c, caspase-3 and -9 in the DMH-alone-exposed rats. Thus AA was able to inhibit DMH-induced colon carcinogenesis by detoxifying the carcinogen, decreasing the preneoplastic lesions by virtue of its anti-inflammatory, antiproliferative and proapoptotic effects. Therefore our findings suggest that AA could be used as an effective chemopreventive agent against DMH induced colon carcinogenesis.
Collapse
Affiliation(s)
- Aktarul Islam Siddique
- Department of Biochemistry and Biotechnology, Faculty of Science, Annamalai University, Annamalainagar, 608002, Tamil Nadu, India
| | - Vijay Mani
- Department of Biochemistry and Biotechnology, Faculty of Science, Annamalai University, Annamalainagar, 608002, Tamil Nadu, India
| | - Senbagarani Renganathan
- Department of Biochemistry and Biotechnology, Faculty of Science, Annamalai University, Annamalainagar, 608002, Tamil Nadu, India
| | - Rajagopal Ayyanar
- Department of Biochemistry and Biotechnology, Faculty of Science, Annamalai University, Annamalainagar, 608002, Tamil Nadu, India
| | - Ananthi Nagappan
- Department of Biochemistry and Biotechnology, Faculty of Science, Annamalai University, Annamalainagar, 608002, Tamil Nadu, India
| | - Nalini Namasivayam
- Department of Biochemistry and Biotechnology, Faculty of Science, Annamalai University, Annamalainagar, 608002, Tamil Nadu, India.
| |
Collapse
|
4
|
Hossain MI, Horie M, Takebayashi H. Reduced Proliferation of Oligodendrocyte Progenitor Cells in the Postnatal Brain of Dystonia Musculorum Mice. Neurochem Res 2017; 43:101-109. [PMID: 28664402 DOI: 10.1007/s11064-017-2342-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2017] [Revised: 06/14/2017] [Accepted: 06/23/2017] [Indexed: 01/08/2023]
Abstract
Dystonia musculorum (dt) mice show sensory neurodegeneration and movement disorder, such as dystonia and cerebellar ataxia. The causative gene Dystonin (Dst) encodes a cytoskeleton linker protein. Although sensory neurodegeneration has been well studied, glial cell responses in the central nervous system (CNS) are poorly understood. Here, we investigated cell proliferation in the CNS of Dst Gt homozygous mice using newly generated in situ hybridization (ISH) probes-Ki-67 and proliferating cell nuclear antigen (PCNA) probes-both of which effectively detect proliferating cells. We found that Ki-67-positive cells were significantly decreased in the corpus callosum and thalamus of dt brain at postnatal day 21 (P21). There is a similar but not significant tendency at postnatal day 14 (P14) in the dt brain. We also confirmed the reduced proliferation by PCNA ISH and Ki-67 immunohistochemistry. Double staining with cell-type-specific markers revealed that proliferating cells are oligodendrocyte progenitor cells (OPCs) in both wild-type and dt brain. We also observed a reduced number of Olig2-positive cells in the corpus callosum of Dst Gt homozygous mice at P21, indicating that reduced proliferation resulted in a reduced number of OPCs. Our data indicate that OPCs proliferation is reduced in the dt mouse brain at the postnatal stage and that it subsequently results in the reduced number of OPCs.
Collapse
Affiliation(s)
- M Ibrahim Hossain
- Division of Neurobiology and Anatomy, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, 951-8510, Japan
- Department of Biochemistry and Molecular Biology, Jahangirnagar University, Savar, Dhaka, 1342, Bangladesh
| | - Masao Horie
- Division of Neurobiology and Anatomy, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, 951-8510, Japan
- Department of Morphological Sciences, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, 890-8544, Japan
| | - Hirohide Takebayashi
- Division of Neurobiology and Anatomy, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, 951-8510, Japan.
| |
Collapse
|
5
|
Bachy M, Sherifi I, Zadegan F, Petite H, Vialle R, Hannouche D. Allograft integration in a rabbit transgenic model for anterior cruciate ligament reconstruction. Orthop Traumatol Surg Res 2016; 102:189-95. [PMID: 26775085 DOI: 10.1016/j.otsr.2015.12.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/25/2015] [Revised: 12/05/2015] [Accepted: 12/15/2015] [Indexed: 02/02/2023]
Abstract
BACKGROUND Tissue engineering strategies include both cell-based and cell homing therapies. Ligamentous tissues are highly specialized and constitute vital components of the musculoskeletal system. Their damage causes significant morbidity and loss in function. HYPOTHESIS The aim of this study is to analyze tendinous graft integration, cell repopulation and ligamentization by using GFP+/- allografts in GFP+/- transgenic New Zealand white (NZW) rabbits. MATERIAL AND METHODS Graft implantation was designed to closely mimic anterior cruciate ligament (ACL) repair surgery. Allografts were implanted in 8 NZW rabbits and assessed at 5 days, 3 weeks and 6 weeks through: (1) arthroCT imaging, (2) morphological analysis of the transplanted allograft, (3) histological analysis, (4) collagen type I immunochemistry, and (5) GFP cell tracking. Collagen remodeling was appreciated at 3 and 6 weeks. RESULTS Graft repopulation with host cells, chondrocyte-like cells at the tendon-bone interface and graft corticalization in the bone tunnels were noticed at 3 weeks. By contrast we noticed a central necrosis aspect in the allografts intra-articularly at 6 weeks with a cell migration towards the graft edge near the synovium. DISCUSSION Our study has served to gain a better understanding of tendinous allograft bone integration, ligamentization and allograft repopulation. We believe that both cell-based therapies and cell homing therapies are beneficial in ligament tissue engineering. Future studies may elucidate whether cell repopulation occurs with pre-differentiated or progenitor cells. We believe that both cell-based therapies and cell homing therapies are beneficial in ligament tissue engineering. LEVEL OF EVIDENCE Level V (animal study).
Collapse
Affiliation(s)
- M Bachy
- Laboratoire de bioingénierie et bioimagerie ostéo-articulaire (B2OA), CNRS UMR 7052, université Denis-Diderot Paris VII, Paris, France; Université Pierre et Marie Curie Paris 6, Department of Pediatric Orthopaedics, Armand-Trousseau Hospital, 26, avenue du Dr-Arnold-Netter, 75571 Paris cedex 12, France; The MAMUTH Hospital-University Department for Innovative Therapies in Musculoskeletal Diseases, Armand-Trousseau Hospital, 26, avenue du Docteur-Arnold-Netter, 75571 Paris cedex 12, France
| | - I Sherifi
- Laboratoire de bioingénierie et bioimagerie ostéo-articulaire (B2OA), CNRS UMR 7052, université Denis-Diderot Paris VII, Paris, France; The Mount Sinai Hospital One Gustave L.-Levy Place, New York, USA
| | - F Zadegan
- Laboratoire de bioingénierie et bioimagerie ostéo-articulaire (B2OA), CNRS UMR 7052, université Denis-Diderot Paris VII, Paris, France; Service de chirurgie orthopédique et réparatrice, hôpital Lariboisière, AP-HP, université Denis-Diderot Paris VII, Paris, France
| | - H Petite
- Laboratoire de bioingénierie et bioimagerie ostéo-articulaire (B2OA), CNRS UMR 7052, université Denis-Diderot Paris VII, Paris, France
| | - R Vialle
- Université Pierre et Marie Curie Paris 6, Department of Pediatric Orthopaedics, Armand-Trousseau Hospital, 26, avenue du Dr-Arnold-Netter, 75571 Paris cedex 12, France; The MAMUTH Hospital-University Department for Innovative Therapies in Musculoskeletal Diseases, Armand-Trousseau Hospital, 26, avenue du Docteur-Arnold-Netter, 75571 Paris cedex 12, France.
| | - D Hannouche
- Laboratoire de bioingénierie et bioimagerie ostéo-articulaire (B2OA), CNRS UMR 7052, université Denis-Diderot Paris VII, Paris, France; Service de chirurgie orthopédique et réparatrice, hôpital Lariboisière, AP-HP, université Denis-Diderot Paris VII, Paris, France
| |
Collapse
|
6
|
Ray A, Singh PNP, Sohaskey ML, Harland RM, Bandyopadhyay A. Precise spatial restriction of BMP signaling is essential for articular cartilage differentiation. Development 2015; 142:1169-79. [PMID: 25758226 DOI: 10.1242/dev.110940] [Citation(s) in RCA: 73] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The articular cartilage, which lines the joints of the limb skeleton, is distinct from the adjoining transient cartilage, and yet, it differentiates as a unique population within a contiguous cartilage element. Current literature suggests that articular cartilage and transient cartilage originate from different cell populations. Using a combination of lineage tracing and pulse-chase of actively proliferating chondrocytes, we here demonstrate that, similar to transient cartilage, embryonic articular cartilage cells also originate from the proliferating chondrocytes situated near the distal ends of skeletal anlagen. We show that nascent cartilage cells are capable of differentiating as articular or transient cartilage, depending on exposure to Wnt or BMP signaling, respectively. The spatial organization of the articular cartilage results from a band of Nog-expressing cells, which insulates these proliferating chondrocytes from BMP signaling and allows them to differentiate as articular cartilage under the influence of Wnt signaling emanating from the interzone. Through experiments conducted in both chick and mouse embryos we have developed a model explaining simultaneous growth and differentiation of transient and articular cartilage in juxtaposed domains.
Collapse
Affiliation(s)
- Ayan Ray
- Department of Biological Sciences and Bioengineering, Indian Institute of Technology, Kanpur, U.P. 208016, India
| | - Pratik Narendra Pratap Singh
- Department of Biological Sciences and Bioengineering, Indian Institute of Technology, Kanpur, U.P. 208016, India
| | - Michael L Sohaskey
- Department of Molecular and Cell Biology, University of California, Berkeley, CA 94720, USA
| | - Richard M Harland
- Department of Molecular and Cell Biology, University of California, Berkeley, CA 94720, USA
| | - Amitabha Bandyopadhyay
- Department of Biological Sciences and Bioengineering, Indian Institute of Technology, Kanpur, U.P. 208016, India
| |
Collapse
|
7
|
Mroczek-Sosnowska N, Sawosz E, Vadalasetty KP, Łukasiewicz M, Niemiec J, Wierzbicki M, Kutwin M, Jaworski S, Chwalibog A. Nanoparticles of copper stimulate angiogenesis at systemic and molecular level. Int J Mol Sci 2015; 16:4838-49. [PMID: 25741768 PMCID: PMC4394452 DOI: 10.3390/ijms16034838] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2015] [Revised: 02/12/2015] [Accepted: 02/15/2015] [Indexed: 01/01/2023] Open
Abstract
Copper is a key element affecting blood vessel growth and muscle development. However, the ions released from Cu salts are toxic. Given their specific physicochemical properties, nanoparticles of Cu (NanoCu) may have different bioactivity and affect the development of blood vessel and muscles in a different manner than Cu salts. The objective of the study was to evaluate the influence of NanoCu on embryo development and angiogenesis at the systemic and molecular level, in experiments using a chick embryo model. Fertilized chicken eggs were divided into a control group, and groups injected with a placebo, CuSO4 or NanoCu. Embryo development at the whole body level and molecular indices using an embryo chorioallantoic membrane model were measured during embryogenesis. The present study indicated for the first time that NanoCu have pro-angiogenic properties at the systemic level, to a greater degree than CuSO4 salt. The properties of NanoCu were confirmed at the molecular level, demonstrating significant effects on mRNA concentration and on mRNA gene expression of all pro-angiogenic and pro-proliferative genes measured herein.
Collapse
Affiliation(s)
- Natalia Mroczek-Sosnowska
- Division of Poultry Breeding, Warsaw University of Life Sciences, Ciszewskiego 8, 02-786 Warsaw, Poland.
| | - Ewa Sawosz
- Division of Nanobiotechnology, Warsaw University of Life Sciences, Ciszewskiego 8, 02-786 Warsaw, Poland.
| | - Krishna Prasad Vadalasetty
- Department of Veterinary Clinical and Animal Sciences, University of Copenhagen, Groennegaardsvej 3, 1870 Frederiksberg, Denmark.
| | - Monika Łukasiewicz
- Division of Poultry Breeding, Warsaw University of Life Sciences, Ciszewskiego 8, 02-786 Warsaw, Poland.
| | - Jan Niemiec
- Division of Poultry Breeding, Warsaw University of Life Sciences, Ciszewskiego 8, 02-786 Warsaw, Poland.
| | - Mateusz Wierzbicki
- Division of Nanobiotechnology, Warsaw University of Life Sciences, Ciszewskiego 8, 02-786 Warsaw, Poland.
| | - Marta Kutwin
- Division of Nanobiotechnology, Warsaw University of Life Sciences, Ciszewskiego 8, 02-786 Warsaw, Poland.
| | - Sławomir Jaworski
- Division of Nanobiotechnology, Warsaw University of Life Sciences, Ciszewskiego 8, 02-786 Warsaw, Poland.
| | - André Chwalibog
- Department of Veterinary Clinical and Animal Sciences, University of Copenhagen, Groennegaardsvej 3, 1870 Frederiksberg, Denmark.
| |
Collapse
|
8
|
Verreet T, Quintens R, Van Dam D, Verslegers M, Tanori M, Casciati A, Neefs M, Leysen L, Michaux A, Janssen A, D'Agostino E, Vande Velde G, Baatout S, Moons L, Pazzaglia S, Saran A, Himmelreich U, De Deyn PP, Benotmane MA. A multidisciplinary approach unravels early and persistent effects of X-ray exposure at the onset of prenatal neurogenesis. J Neurodev Disord 2015; 7:3. [PMID: 26029273 PMCID: PMC4448911 DOI: 10.1186/1866-1955-7-3] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/22/2014] [Accepted: 12/22/2014] [Indexed: 01/05/2023] Open
Abstract
Background In humans, in utero exposure to ionising radiation results in an increased prevalence of neurological aberrations, such as small head size, mental retardation and decreased IQ levels. Yet, the association between early damaging events and long-term neuronal anomalies remains largely elusive. Methods Mice were exposed to different X-ray doses, ranging between 0.0 and 1.0 Gy, at embryonic days (E) 10, 11 or 12 and subjected to behavioural tests at 12 weeks of age. Underlying mechanisms of irradiation at E11 were further unravelled using magnetic resonance imaging (MRI) and spectroscopy, diffusion tensor imaging, gene expression profiling, histology and immunohistochemistry. Results Irradiation at the onset of neurogenesis elicited behavioural changes in young adult mice, dependent on the timing of exposure. As locomotor behaviour and hippocampal-dependent spatial learning and memory were most particularly affected after irradiation at E11 with 1.0 Gy, this condition was used for further mechanistic analyses, focusing on the cerebral cortex and hippocampus. A classical p53-mediated apoptotic response was found shortly after exposure. Strikingly, in the neocortex, the majority of apoptotic and microglial cells were residing in the outer layer at 24 h after irradiation, suggesting cell death occurrence in differentiating neurons rather than proliferating cells. Furthermore, total brain volume, cortical thickness and ventricle size were decreased in the irradiated embryos. At 40 weeks of age, MRI showed that the ventricles were enlarged whereas N-acetyl aspartate concentrations and functional anisotropy were reduced in the cortex of the irradiated animals, indicating a decrease in neuronal cell number and persistent neuroinflammation. Finally, in the hippocampus, we revealed a reduction in general neurogenic proliferation and in the amount of Sox2-positive precursors after radiation exposure, although only at a juvenile age. Conclusions Our findings provide evidence for a radiation-induced disruption of mouse brain development, resulting in behavioural differences. We propose that alterations in cortical morphology and juvenile hippocampal neurogenesis might both contribute to the observed aberrant behaviour. Furthermore, our results challenge the generally assumed view of a higher radiosensitivity in dividing cells. Overall, this study offers new insights into irradiation-dependent effects in the embryonic brain, of relevance for the neurodevelopmental and radiobiological field. Electronic supplementary material The online version of this article (doi:10.1186/1866-1955-7-3) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Tine Verreet
- Radiobiology Unit, Laboratory of Molecular and Cellular Biology, Institute for Environment, Health and Safety, Belgian Nuclear Research Centre, SCK•CEN, 2400 Mol, Belgium ; Laboratory of Neural Circuit Development and Regeneration, Department of Biology, Faculty of Science, University of Leuven, 3000 Leuven, Belgium
| | - Roel Quintens
- Radiobiology Unit, Laboratory of Molecular and Cellular Biology, Institute for Environment, Health and Safety, Belgian Nuclear Research Centre, SCK•CEN, 2400 Mol, Belgium
| | - Debby Van Dam
- Laboratory of Neurochemistry and Behaviour, Institute Born-Bunge, Department of Biomedical Sciences, University of Antwerp, 2610 Wilrijk, Belgium
| | - Mieke Verslegers
- Radiobiology Unit, Laboratory of Molecular and Cellular Biology, Institute for Environment, Health and Safety, Belgian Nuclear Research Centre, SCK•CEN, 2400 Mol, Belgium
| | - Mirella Tanori
- Laboratory of Radiation Biology and Biomedicine, Agenzia Nazionale per le Nuove Tecnologie, Casaccia Research Centre, l'Energia e lo Sviluppo Economico Sostenibile (ENEA), 00123 Rome, Italy
| | - Arianna Casciati
- Laboratory of Radiation Biology and Biomedicine, Agenzia Nazionale per le Nuove Tecnologie, Casaccia Research Centre, l'Energia e lo Sviluppo Economico Sostenibile (ENEA), 00123 Rome, Italy
| | - Mieke Neefs
- Radiobiology Unit, Laboratory of Molecular and Cellular Biology, Institute for Environment, Health and Safety, Belgian Nuclear Research Centre, SCK•CEN, 2400 Mol, Belgium
| | - Liselotte Leysen
- Radiobiology Unit, Laboratory of Molecular and Cellular Biology, Institute for Environment, Health and Safety, Belgian Nuclear Research Centre, SCK•CEN, 2400 Mol, Belgium
| | - Arlette Michaux
- Radiobiology Unit, Laboratory of Molecular and Cellular Biology, Institute for Environment, Health and Safety, Belgian Nuclear Research Centre, SCK•CEN, 2400 Mol, Belgium
| | - Ann Janssen
- Radiobiology Unit, Laboratory of Molecular and Cellular Biology, Institute for Environment, Health and Safety, Belgian Nuclear Research Centre, SCK•CEN, 2400 Mol, Belgium
| | - Emiliano D'Agostino
- SB Dosimetry and Calibration, Institute for Environment, Health and Safety, Belgian Nuclear Research Centre, SCK•CEN, 2400 Mol, Belgium
| | - Greetje Vande Velde
- Biomedical NMR Unit, Department of Imaging and Pathology, Faculty of Medicine, University of Leuven, 3000 Leuven, Belgium ; Molecular Small Animal Imaging Center (MoSAIC), Faculty of Medicine, University of Leuven, 3000 Leuven, Belgium
| | - Sarah Baatout
- Radiobiology Unit, Laboratory of Molecular and Cellular Biology, Institute for Environment, Health and Safety, Belgian Nuclear Research Centre, SCK•CEN, 2400 Mol, Belgium
| | - Lieve Moons
- Laboratory of Neural Circuit Development and Regeneration, Department of Biology, Faculty of Science, University of Leuven, 3000 Leuven, Belgium
| | - Simonetta Pazzaglia
- Laboratory of Radiation Biology and Biomedicine, Agenzia Nazionale per le Nuove Tecnologie, Casaccia Research Centre, l'Energia e lo Sviluppo Economico Sostenibile (ENEA), 00123 Rome, Italy
| | - Anna Saran
- Laboratory of Radiation Biology and Biomedicine, Agenzia Nazionale per le Nuove Tecnologie, Casaccia Research Centre, l'Energia e lo Sviluppo Economico Sostenibile (ENEA), 00123 Rome, Italy
| | - Uwe Himmelreich
- Biomedical NMR Unit, Department of Imaging and Pathology, Faculty of Medicine, University of Leuven, 3000 Leuven, Belgium ; Molecular Small Animal Imaging Center (MoSAIC), Faculty of Medicine, University of Leuven, 3000 Leuven, Belgium
| | - Peter Paul De Deyn
- Laboratory of Neurochemistry and Behaviour, Institute Born-Bunge, Department of Biomedical Sciences, University of Antwerp, 2610 Wilrijk, Belgium ; Department of Neurology and Alzheimer Research Center, University of Groningen, University Medical Center Groningen, 9713 GZ Groningen, The Netherlands
| | - Mohammed Abderrafi Benotmane
- Radiobiology Unit, Laboratory of Molecular and Cellular Biology, Institute for Environment, Health and Safety, Belgian Nuclear Research Centre, SCK•CEN, 2400 Mol, Belgium
| |
Collapse
|
9
|
Vindas MA, Sørensen C, Johansen IB, Folkedal O, Höglund E, Khan UW, Stien LH, Kristiansen TS, Braastad BO, Øverli Ø. Coping with unpredictability: dopaminergic and neurotrophic responses to omission of expected reward in Atlantic salmon (Salmo salar L.). PLoS One 2014; 9:e85543. [PMID: 24465595 PMCID: PMC3894970 DOI: 10.1371/journal.pone.0085543] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2013] [Accepted: 12/04/2013] [Indexed: 01/13/2023] Open
Abstract
Comparative studies are imperative for understanding the evolution of adaptive neurobiological processes such as neural plasticity, cognition, and emotion. Previously we have reported that prolonged omission of expected rewards (OER, or 'frustrative nonreward') causes increased aggression in Atlantic salmon (Salmo salar). Here we report changes in brain monoaminergic activity and relative abundance of brain derived neurotrophic factor (BDNF) and dopamine receptor mRNA transcripts in the same paradigm. Groups of fish were initially conditioned to associate a flashing light with feeding. Subsequently, the expected food reward was delayed for 30 minutes during two out of three meals per day in the OER treatment, while the previously established routine was maintained in control groups. After 8 days there was no effect of OER on baseline brain stem serotonin (5-HT) or dopamine (DA) activity. Subsequent exposure to acute confinement stress led to increased plasma cortisol and elevated turnover of brain stem DA and 5-HT in all animals. The DA response was potentiated and DA receptor 1 (D1) mRNA abundance was reduced in the OER-exposed fish, indicating a sensitization of the DA system. In addition OER suppressed abundance of BDNF in the telencephalon of non-stressed fish. Regardless of OER treatment, a strong positive correlation between BDNF and D1 mRNA abundance was seen in non-stressed fish. This correlation was disrupted by acute stress, and replaced by a negative correlation between BDNF abundance and plasma cortisol concentration. These observations indicate a conserved link between DA, neurotrophin regulation, and corticosteroid-signaling pathways. The results also emphasize how fish models can be important tools in the study of neural plasticity and responsiveness to environmental unpredictability.
Collapse
MESH Headings
- Adaptation, Psychological
- Analysis of Variance
- Animals
- Behavior, Animal
- Biogenic Monoamines/metabolism
- Brain/metabolism
- Brain-Derived Neurotrophic Factor/genetics
- Brain-Derived Neurotrophic Factor/metabolism
- Conditioning, Psychological
- Dopaminergic Neurons/metabolism
- Gene Expression Regulation
- Hydrocortisone/blood
- Nerve Growth Factors/metabolism
- Proliferating Cell Nuclear Antigen/genetics
- Proliferating Cell Nuclear Antigen/metabolism
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- Receptors, Dopamine D1/genetics
- Receptors, Dopamine D1/metabolism
- Receptors, Dopamine D2/genetics
- Receptors, Dopamine D2/metabolism
- Reward
- Salmo salar/blood
- Salmo salar/genetics
- Salmo salar/growth & development
- Salmo salar/metabolism
- Stress, Physiological/genetics
Collapse
Affiliation(s)
- Marco A. Vindas
- Department of Animal and Aquacultural Sciences, Norwegian University of Life Sciences, Ås, Norway
- * E-mail:
| | | | | | - Ole Folkedal
- Department of Animal Welfare, Institute of Marine Research, Matredal, Norway
| | - Erik Höglund
- Department of Marine Ecology and Aquaculture, Danish Institute for Fisheries Research, Hirtshals, Denmark
| | - Uniza W. Khan
- Department of Animal and Aquacultural Sciences, Norwegian University of Life Sciences, Ås, Norway
| | - Lars H. Stien
- Department of Animal Welfare, Institute of Marine Research, Matredal, Norway
| | - Tore S. Kristiansen
- Department of Animal Welfare, Institute of Marine Research, Matredal, Norway
| | - Bjarne O. Braastad
- Department of Animal and Aquacultural Sciences, Norwegian University of Life Sciences, Ås, Norway
| | - Øyvind Øverli
- Department of Animal and Aquacultural Sciences, Norwegian University of Life Sciences, Ås, Norway
| |
Collapse
|
10
|
Shi X, He C, Zuo Z, Li R, Chen D, Chen R, Wang C. Pyrene exposure influences the craniofacial cartilage development of Sebastiscus marmoratus embryos. MARINE ENVIRONMENTAL RESEARCH 2012; 77:30-34. [PMID: 22336231 DOI: 10.1016/j.marenvres.2012.01.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2011] [Revised: 12/24/2011] [Accepted: 01/16/2012] [Indexed: 05/31/2023]
Abstract
Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous environmental contaminants, which are known carcinogens and teratogens. However, the toxicity of PAHs during skeletal development and the mechanism involved are not completely clear. In the present study, rockfish (Sebastiscus marmoratus) embryos were exposed to pyrene (Pyr) for 7 days at 0.5, 5 and 50 nM which resulted in craniofacial skeleton deformities. Pyr exposure for 6 days reduced the expression of PCNA, Col2a1 and Sox9 in the craniofacial skeleton revealed using in situ hybridization. These results suggest that Pyr exposure impairs skeleton development via disrupting the proliferation of the chondrocytes. At the same time, Pyr exposure reduced the expression of lox1 and inhibited the activity of lysyl oxidase, which is the key enzyme controlling the collagen cross-linking, and which might therefore have been one of the reasons for the deformative Meckel's cartilage (lower jaw).
Collapse
Affiliation(s)
- Xiao Shi
- Key Laboratory of Ministry of Education for Subtropical Wetland Ecosystem Research, School of Life Sciences, Xiamen University, Xiamen, China
| | | | | | | | | | | | | |
Collapse
|
11
|
Zhang J, Zuo Z, Sun P, Wang H, Yu A, Wang C. Tributyltin exposure results in craniofacial cartilage defects in rockfish (Sebastiscus marmoratus) embryos. MARINE ENVIRONMENTAL RESEARCH 2012; 77:6-11. [PMID: 22261028 DOI: 10.1016/j.marenvres.2011.12.008] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2011] [Revised: 11/18/2011] [Accepted: 12/30/2011] [Indexed: 05/31/2023]
Abstract
Tributyltin (TBT) is a ubiquitous marine environmental contaminant, which has been known to cause axial skeletal deformities in fish embryos. However, the effects of TBT on the craniofacial cartilage development of fishes remain unclear. The present study was designed to investigate the effects of waterborne TBT at environmental levels (0, 0.1, 1, and 10 ng L(-1) as Sn) on craniofacial cartilage development in embryos of the rockfish (Sebastiscus marmoratus). Our study showed that TBT exposure induced craniofacial skeletal deformities, such as reduction of the craniofacial skeleton elements and a shorter lower jaw. The expressions of retinoic acid receptor α, sonic hedgehog, and proliferating cell nuclear antigen were depressed and the expressions of vitamin D receptor were increased in the rockfish embryos after TBT exposure. In addition, the activities of Ca(2+)-ATPase were inhibited after TBT exposure. These results suggested that TBT might perturb the proliferation and differentiation of chondrocytes, and disturb calcium homeostasis, thus disorganizing craniofacial skeletal development.
Collapse
Affiliation(s)
- Jiliang Zhang
- College of Animal Science and Technology, Henan University of Science and Technology, Luoyang, PR China
| | | | | | | | | | | |
Collapse
|
12
|
Defining structural homology between the mammalian and avian hippocampus through conserved gene expression patterns observed in the chick embryo. Dev Biol 2012; 366:125-41. [DOI: 10.1016/j.ydbio.2012.03.027] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2011] [Revised: 03/26/2012] [Accepted: 03/27/2012] [Indexed: 11/21/2022]
|
13
|
Neural plasticity is affected by stress and heritable variation in stress coping style. COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY D-GENOMICS & PROTEOMICS 2012; 7:161-71. [PMID: 22285148 DOI: 10.1016/j.cbd.2012.01.002] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2011] [Revised: 01/03/2012] [Accepted: 01/04/2012] [Indexed: 02/07/2023]
Abstract
Here we use a comparative model to investigate how behavioral and physiological traits correlate with neural plasticity. Selection for divergent post-stress cortisol levels in rainbow trout (Oncorhynchus mykiss) has yielded low- (LR) and high responsive (HR) lines. Recent reports show low behavioral flexibility in LR compared to HR fish and we hypothesize that this divergence is caused by differences in neural plasticity. Genes involved in neural plasticity and neurogenesis were investigated by quantitative PCR in brains of LR and HR fish at baseline conditions and in response to two different stress paradigms: short-term confinement (STC) and long-term social (LTS) stress. Expression of proliferating cell nuclear antigen (PCNA), neurogenic differentiation factor (NeuroD) and doublecortin (DCX) was generally higher in HR compared to LR fish. STC stress led to increased expression of PCNA and brain-derived neurotrophic factor (BDNF) in both lines, whereas LTS stress generally suppressed PCNA and NeuroD expression while leaving BDNF expression unaltered. These results indicate that the transcription of neuroplasticity-related genes is associated with variation in coping style, while also being affected by STC - and LTS stress in a biphasic manner. A higher degree of neural plasticity in HR fish may provide the substrate for enhanced behavioral flexibility.
Collapse
|
14
|
Itzkovitz S, Lyubimova A, Blat IC, Maynard M, van Es J, Lees J, Jacks T, Clevers H, van Oudenaarden A. Single-molecule transcript counting of stem-cell markers in the mouse intestine. Nat Cell Biol 2011; 14:106-14. [PMID: 22119784 DOI: 10.1038/ncb2384] [Citation(s) in RCA: 268] [Impact Index Per Article: 20.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2011] [Accepted: 10/21/2011] [Indexed: 12/15/2022]
Abstract
Determining the molecular identities of adult stem cells requires technologies for sensitive transcript detection in tissues. In mouse intestinal crypts, lineage-tracing studies indicated that different genes uniquely mark spatially distinct stem-cell populations, residing either at crypt bases or at position +4, but a detailed analysis of their spatial co-expression has not been feasible. Here we apply three-colour single-molecule fluorescent in situ hybridization to study a comprehensive panel of intestinal stem-cell markers during homeostasis, ageing and regeneration. We find that the expression of all markers overlaps at crypt-base cells. This co-expression includes Lgr5, Bmi1 and mTert, genes previously suggested to mark distinct stem cells. Strikingly, Dcamkl1 tuft cells, distributed throughout the crypt axis, co-express Lgr5 and other stem-cell markers that are otherwise confined to crypt bases. We also detect significant changes in the expression of some of the markers following irradiation, indicating their potential role in the regeneration process. Our approach can enable the sensitive detection of putative stem cells in other tissues and in tumours, guiding complementary functional studies to evaluate their stem-cell properties.
Collapse
Affiliation(s)
- Shalev Itzkovitz
- Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | | | | | | | | | | | | | | | | |
Collapse
|
15
|
Nagarajan G, Tsai YJ, Chen CY, Chang CF. Developmental expression of genes involved in neural estrogen biosynthesis and signaling in the brain of the orange-spotted grouper Epinephelus coioides during gonadal sex differentiation. J Steroid Biochem Mol Biol 2011; 127:155-66. [PMID: 21513797 DOI: 10.1016/j.jsbmb.2011.03.021] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/19/2010] [Revised: 03/22/2011] [Accepted: 03/25/2011] [Indexed: 12/11/2022]
Abstract
In the brain, the synthesis of neurosteroids and receptor activation during gonadal sex differentiation in teleosts are poorly understood. In the present study, the protogynous orange-spotted grouper (Epinephelus coioides) was selected as a model fish, and we hypothesized that de novo synthesis of neural estrogen may play a role in the female grouper brain during gonadal sex differentiation. We investigated the temporal expression of the genes StAR, cyp19a1b and pcna and the sex steroid nuclear receptors for estrogen (ERα, ERβ1 and ERβ2), androgen (AR) and the plasma membrane-associated estrogen receptor (GPR30) in the brain during early developmental ages from 90 days after hatching (dah) to 180dah after gonadal sex differentiation. Our results revealed that mRNA for ERs and GPR30 but not AR was significantly increased at 110dah (a time close to gonadal sex differentiation) in the forebrain and midbrain and for cyp19a1b at 110dah in the forebrain. Brain aromatase activity and estradiol (E2) levels, but not testosterone (T), were increased in the forebrain at 110 and 120dah, respectively. Furthermore, exogenous E2 stimulated cyp19a1b transcripts in the forebrain and hypothalamus and immunoreactive (ir)Cyp19a1b (aromatase enzyme) in the forebrain. irCyp19a1b localized in the glial cells of the forebrain regions. Therefore, we identified a peak of functional aromatase activity and estrogen signaling in the early grouper brain during gonadal sex differentiation. Moreover, pcna transcripts (a marker for cell proliferation activity) were higher in the early brain at 110-150dah. Thus, a peak time of development in the brain is suggested to occur during gonadal sex differentiation in the grouper.
Collapse
Affiliation(s)
- Ganesan Nagarajan
- Department of Aquaculture, National Taiwan Ocean University, Keelung 20224, Taiwan
| | | | | | | |
Collapse
|
16
|
Johansen IB, Lunde IG, Røsjø H, Christensen G, Nilsson GE, Bakken M, Overli O. Cortisol response to stress is associated with myocardial remodeling in salmonid fishes. ACTA ACUST UNITED AC 2011; 214:1313-21. [PMID: 21430209 DOI: 10.1242/jeb.053058] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Cardiac disease is frequently reported in farmed animals, and stress has been implicated as a factor for myocardial dysfunction in commercial fish rearing. Cortisol is a major stress hormone in teleosts, and this hormone has adverse effects on the myocardium. Strains of rainbow trout (Oncorhynchus mykiss) selected for divergent post-stress cortisol levels [high responsive (HR) and low responsive (LR)] have been established as a comparative model to examine how fish with contrasting stress-coping styles differ in their physiological and behavioral profiles. We show that the mean cardiosomatic index (CSI) of adult HR fish was 34% higher than in LR fish, mainly because of hypertrophy of the compact myocardium. To characterize the hypertrophy as physiological or pathological, we investigated specific cardiac markers at the transcriptional level. HR hearts had higher mRNA levels of cortisol receptors (MR, GR1 and GR2), increased RCAN1 levels [suggesting enhanced pro-hypertrophic nuclear factor of activated T-cell (NFAT) signaling] and increased VEGF gene expression (reflecting increased angiogenesis). Elevated collagen (Col1a2) expression and deposition in HR hearts supported enhanced fibrosis, whereas the heart failure markers ANP and BNP were not upregulated in HR hearts. To confirm our results outside the selection model, we investigated the effect of acute confinement stress in wild-type European brown trout, Salmo trutta. A positive correlation between post-stress cortisol levels and CSI was observed, supporting an association between enhanced cortisol response and myocardial remodeling. In conclusion, post-stress cortisol production correlates with myocardial remodeling, and coincides with several indicators of heart pathology, well-known from mammalian cardiology.
Collapse
Affiliation(s)
- Ida B Johansen
- Department of Animal and Aquacultural Sciences, Norwegian University of Life Sciences (UMB), 0476 Ås, Norway.
| | | | | | | | | | | | | |
Collapse
|
17
|
Al-Musawi SL, Lock F, Simbi BH, Bayol SAM, Stickland NC. Muscle specific differences in the regulation of myogenic differentiation in chickens genetically selected for divergent growth rates. Differentiation 2011; 82:127-35. [PMID: 21723031 PMCID: PMC3181402 DOI: 10.1016/j.diff.2011.05.012] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2011] [Revised: 05/03/2011] [Accepted: 05/27/2011] [Indexed: 12/15/2022]
Abstract
With the human population predicted to reach 9 billion by 2050, increasing food supplies while maintaining adequate standards of animal welfare has become a global priority. In the poultry industry, broilers are genetically selected for greater pectoral but not leg muscularity yield leading to leg disorders and thereby welfare issues. It is known that the pectoralis major of broilers contains more muscle fibres of larger diameters than egg-layers but little is known about the leg gastrocnemius muscle cellular characteristics. As muscle fibre numbers are set by hatch, the molecular regulation of myogenesis was investigated in pectoral (selected) and gastrocnemius (unselected) muscles of chick embryos to help explain diverging post-hatch phenotypes. Results showed that broilers were more active from embryonic day (ED) 8 and heavier from ED12 to 18 than layers. The pectoral muscle of broilers exhibited increased myoblast proliferation on ED15 (raised myonuclei, MyoD and PCNA) followed by increased differentiation from ED16 (raised myogenin, IGF-I) leading to increased muscle fibre hyperplasia and mass by ED18 compared to layers. In the gastrocnemius muscle of broilers, cell proliferation was also raised up to ED15 accompanied by increased PCNA, MyoD and IGF-I mRNAs. However, from ED16, myogenin and IGF-I mRNAs were similar to that of layers and PCNA was reduced leading to similar fibre area, nuclei numbers and muscle mass at ED18. We conclude that genetic selection for enhanced post-hatch pectoral muscle growth has altered the temporal expression of IGF-I and thereby myogenin transcription affecting cellular characteristics and mass by hatch in a muscle specific manner. These observations should help develop intervention strategies aimed at improving leg muscle strength and thereby animal welfare to meet growing consumer demand.
Collapse
Affiliation(s)
- Sara L Al-Musawi
- Department of Veterinary Basic Sciences, the Royal Veterinary College, London, United Kingdom.
| | | | | | | | | |
Collapse
|
18
|
Welten M, Pavlovska G, Chen Y, Teruoka Y, Fisher M, Bangs F, Towers M, Tickle C. 3D expression patterns of cell cycle genes in the developing chick wing and comparison with expression patterns of genes implicated in digit specification. Dev Dyn 2011; 240:1278-88. [DOI: 10.1002/dvdy.22633] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
|
19
|
He C, Zuo Z, Shi X, Li R, Chen D, Huang X, Chen Y, Wang C. Effects of benzo(a)pyrene on the skeletal development of Sebastiscus marmoratus embryos and the molecular mechanism involved. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2011; 101:335-41. [PMID: 21216343 DOI: 10.1016/j.aquatox.2010.11.008] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2010] [Revised: 10/19/2010] [Accepted: 11/13/2010] [Indexed: 05/26/2023]
Abstract
Polycyclic aromatic hydrocarbons (PAHs) are widespread environmental contaminants, which have been known to be carcinogenic and teratogenic. However, the skeletal development toxicity of PAHs and the mechanism involved remain unclear. In fishes, the neurocranial and craniofacial skeleton develop as cartilage. The signaling molecules of hedgehog (Hh) family play crucial roles in regulating skeletal development. In the present study, rockfish (Sebastiscus marmoratus) embryos were exposed to benzo(a)pyrene (BaP) for 7 days at environmental levels (0.05, 0.5 and 5nmol/L) which resulted in craniofacial skeleton deformities. BaP exposure reduced the cell proliferation activity in the craniofacial skeleton as detected by quantitative PCR and in situ hybridization. The expression of Sonic hedgehog (Shh), rather than Indian hedgehog (Ihh), was down-regulated in the craniofacial skeleton in the 0.5 and 5nmol/L groups. Consistent with the Shh results, the expression of Ptch1 and Gli2 was decreased by BaP exposure and BMP4 was presented on changes in the 0.5 and 5nmol/L groups. These results suggested that BaP could impair the expression and function of Shh signaling pathway, perturbing the proliferation of chondrocytes and so disturbing craniofacial skeletal development.
Collapse
Affiliation(s)
- Chengyong He
- Key Laboratory of Ministry of Education for Subtropical Wetland Ecosystem Research, School of Life Sciences, Xiamen University, Xiamen, China
| | | | | | | | | | | | | | | |
Collapse
|
20
|
Identification, mRNA expression and characterization of proliferating cell nuclear antigen gene from Chinese mitten crab Eriocheir japonica sinensis. Comp Biochem Physiol A Mol Integr Physiol 2010; 157:170-6. [PMID: 20542131 DOI: 10.1016/j.cbpa.2010.06.163] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2010] [Revised: 06/05/2010] [Accepted: 06/07/2010] [Indexed: 11/22/2022]
Abstract
The sliding clamp proliferating cell nuclear antigen (PCNA) plays important roles in nucleic acid metabolism. In this work, we isolated a PCNA gene (designated as EjsPCNA, accession: FJ483830) by rapid amplification of cDNA ends approach from the Chinese mitten crab Eriocheir japonica sinensis. The full-length cDNA of EjsPCNA consists of 1123 nucleotides with an open-reading frame of 780bp encoding 259 amino acids (28.62kDa) and containing an interdomain connecting loop, C-terminal tail, and center loop. Sequence alignment, phylogenetic analyses, and structure comparison revealed that EjsPCNA is a member of the PCNA family. Real-time RT-PCR results indicate that EjsPCNA is expressed throughout three developmental stages. EjsPCNA mRNA expression levels at the first crab stage are significantly higher than that of the other two stages. Present data showed that the expression levels of EjsPCNA in E. j. sinensis are likely related to proliferation activity of tissues, and suggested that EjsPCNA gene is probably involved in the crabs' early developmental regulation.
Collapse
|
21
|
Oral supplementation of silibinin prevents colon carcinogenesis in a long term preclinical model. Eur J Pharmacol 2010; 643:93-100. [PMID: 20537993 DOI: 10.1016/j.ejphar.2010.05.060] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2009] [Revised: 05/10/2010] [Accepted: 05/31/2010] [Indexed: 01/31/2023]
Abstract
Chemoprevention through dietary intervention is an emerging option to reduce colon cancer mortality. beta-catenin plays an important role in the Wnt signaling cascade that is most commonly dysregulated in colorectal cancer. Our aim was to explore the modulatory effect of silibinin on beta-catenin expression employing 1,2-dimethylhydrazine (DMH) induced colon cancer in male Wistar rats as an experimental model during the different stages of carcinogenesis. Colon tissues were analyzed for the expression of beta-catenin, proliferating cell nuclear antigen (PCNA) and argyrophilic nucleolar organizer regions by using immunohistochemistry and silver staining. Immunoblotting was employed to study cyclin D1 expression. Glutathione (GSH) and glutathione related enzymes were assayed by spectrophotometric analysis. Silibinin inhibited DMH-induced colon cancer by decreasing tumor incidence and multiplicity. Silibinin supplementation to DMH-treated rats restored the levels of GSH-dependent enzymes and decreased the levels of beta-catenin, PCNA, argyrophilic nucleolar organizer regions and cyclin D1. Mechanistically silibinin inhibits DMH-induced colon carcinogenesis by modulating the Wnt/beta-catenin pathway and glutathione redox system. Since colon cancer is highly sensitive to dietary intervention adults who may have preneoplastic lesions in their colon may be benefited by silibinin.
Collapse
|
22
|
Autocrine and paracrine Shh signaling are necessary for tooth morphogenesis, but not tooth replacement in snakes and lizards (Squamata). Dev Biol 2009; 337:171-86. [PMID: 19850027 DOI: 10.1016/j.ydbio.2009.10.020] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2009] [Revised: 10/12/2009] [Accepted: 10/12/2009] [Indexed: 11/23/2022]
Abstract
Here we study the role of Shh signaling in tooth morphogenesis and successional tooth initiation in snakes and lizards (Squamata). By characterizing the expression of Shh pathway receptor Ptc1 in the developing dentitions of three species (Eublepharis macularius, Python regius, and Pogona vitticeps) and by performing gain- and loss-of-function experiments, we demonstrate that Shh signaling is active in the squamate tooth bud and is required for its normal morphogenesis. Shh apparently mediates tooth morphogenesis by separate paracrine- and autocrine-mediated functions. According to this model, paracrine Shh signaling induces cell proliferation in the cervical loop, outer enamel epithelium, and dental papilla. Autocrine signaling within the stellate reticulum instead appears to regulate cell survival. By treating squamate dental explants with Hh antagonist cyclopamine, we induced tooth phenotypes that closely resemble the morphological and differentiation defects of vestigial, first-generation teeth in the bearded dragon P. vitticeps. Our finding that these vestigial teeth are deficient in epithelial Shh signaling further corroborates that Shh is needed for the normal development of teeth in snakes and lizards. Finally, in this study, we definitively refute a role for Shh signaling in successional dental lamina formation and conclude that other pathways regulate tooth replacement in squamates.
Collapse
|
23
|
Caterino M, Ruoppolo M, Fulcoli G, Huynth T, Orrù S, Baldini A, Salvatore F. Transcription factor TBX1 overexpression induces downregulation of proteins involved in retinoic acid metabolism: a comparative proteomic analysis. J Proteome Res 2009; 8:1515-26. [PMID: 19178302 DOI: 10.1021/pr800870d] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
TBX1 haploinsufficiency is considered a major contributor to the del22q11.2/DiGeorge syndrome (DGS) phenotype. We have used proteomic tools to look at all the major proteins involved in the TBX1-mediated pathways in an attempt to better understand the molecular interactions instrumental to its cellular functions. We found more than 90 proteins that could be targeted by TBX1 through different mechanisms. The most interesting observation is that overexpression of TBX1 results in down-regulation of two proteins involved in retinoic acid metabolism.
Collapse
Affiliation(s)
- Marianna Caterino
- CEINGE Biotecnologie Avanzate scarl, Napoli, Italy, Dipartimento di Biochimica e Biotecnologie Mediche, Universita di Napoli Federico II, Napoli, Italy
| | | | | | | | | | | | | |
Collapse
|
24
|
ten Berge D, Brugmann SA, Helms JA, Nusse R. Wnt and FGF signals interact to coordinate growth with cell fate specification during limb development. Development 2009; 135:3247-57. [PMID: 18776145 DOI: 10.1242/dev.023176] [Citation(s) in RCA: 217] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
A fundamental question in developmental biology is how does an undifferentiated field of cells acquire spatial pattern and undergo coordinated differentiation? The development of the vertebrate limb is an important paradigm for understanding these processes. The skeletal and connective tissues of the developing limb all derive from a population of multipotent progenitor cells located in its distal tip. During limb outgrowth, these progenitors segregate into a chondrogenic lineage, located in the center of the limb bud, and soft connective tissue lineages located in its periphery. We report that the interplay of two families of signaling proteins, fibroblast growth factors (FGFs) and Wnts, coordinate the growth of the multipotent progenitor cells with their simultaneous segregation into these lineages. FGF and Wnt signals act together to synergistically promote proliferation while maintaining the cells in an undifferentiated, multipotent state, but act separately to determine cell lineage specification. Withdrawal of both signals results in cell cycle withdrawal and chondrogenic differentiation. Continued exposure to Wnt, however, maintains proliferation and re-specifies the cells towards the soft connective tissue lineages. We have identified target genes that are synergistically regulated by Wnts and FGFs, and show how these factors actively suppress differentiation and promote growth. Finally, we show how the spatial restriction of Wnt and FGF signals to the limb ectoderm, and to a specialized region of it, the apical ectodermal ridge, controls the distribution of cell behaviors within the growing limb, and guides the proper spatial organization of the differentiating tissues.
Collapse
Affiliation(s)
- Derk ten Berge
- Howard Hughes Medical Institute, Department of Developmental Biology, Division of Plastic and Reconstructive Surgery, Stanford University School of Medicine, Stanford, CA 94305, USA.
| | | | | | | |
Collapse
|
25
|
Molecular cloning and characterization of proliferating cell nuclear antigen (PCNA) from Chinese shrimp Fenneropenaeus chinensis. Comp Biochem Physiol B Biochem Mol Biol 2008; 151:225-9. [PMID: 18678269 DOI: 10.1016/j.cbpb.2008.07.006] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2008] [Revised: 07/09/2008] [Accepted: 07/11/2008] [Indexed: 12/11/2022]
Abstract
The proliferating cell nuclear antigen gene was cloned from Fenneropenaeus chinensis (FcPCNA). The full-length cDNA sequence of FcPCNA encodes 260 amino acids showing high identity with PCNAs reported in other species. FcPCNA expressed especially high in proliferating tissues of shrimp such as haematopoietic tissue (HPT) and ovary. In order to understand the response of HPT to bacteria and virus challenge, mRNA level of FcPCNA in HPT was analyzed after shrimp were challenged by Vibrio anguillarum and white spot syndrome virus (WSSV). FcPCNA expression in HPT of shrimp was responsive to WSSV and Vibrio challenge, but different expression profiles were obtained after challenge by these two pathogens. The data provide additional information to understand the defense mechanisms of shrimp against virus and bacteria.
Collapse
|
26
|
Pan D, Yang J, Lu F, Xu D, Zhou L, Shi A, Cao K. Platelet-derived growth factor BB modulates PCNA protein synthesis partially through the transforming growth factor beta signalling pathway in vascular smooth muscle cells. Biochem Cell Biol 2007; 85:606-15. [PMID: 17901902 DOI: 10.1139/o07-064] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
PDGF-BB (Platelet-derived growth factor BB) and TGF-β1(transforming growth factor β1) are important growth factors in the modulation of vascular smooth muscle cell (VSMC) proliferation and PCNA (proliferating cell nuclear antigen) expression in VSMCs. PCNA expresses at a high level in proliferating cells. The present study aims to assess the effects of PDGF-BB-induced overexpression of TGF-β1 on PCNA in VSMCs. The downstream proteins of the TGF-β signalling system in VSMCs, including TGF-β type I receptor (ALK-5 in VSMCs), Smurf2, Smad2, pSmad2/3, Smad4, and Smad7, were also investigated. Our results revealed that PDGF-BB significantly increased the expressions of TGF-β1 and PCNA, and the increase in PCNA can be partially inhibited by neutralizing anti-TGF-β1 antibody. Furthermore, PDGF-BB increased the expression of ALK-5, Smurf2, pSmad2/3, and Smad4, but lowered the levels of Smad2 and Smad7; these alterations were partially restored by neutralizing anti-TGF-β1 antibody. These findings suggest that PDGF-BB promotes PCNA expression in VSMCs partially through TGF-β1 overexpression, and that the TGF-β signalling system involves the molecular mechanism of PDGF-BB in VSMCs.
Collapse
Affiliation(s)
- Dabin Pan
- Department of Cardiology, First Affiliated Hospital of Nanjing Medical University, No. 300 Guangzhou Road, Nanjing 210029, PR, China
| | | | | | | | | | | | | |
Collapse
|
27
|
Chen JB, Yu Y, Yang JL, Morgan DAF, Walsh WR. BMP-7 and CBFA1 in allograft bone in vivo bone formation and the influence of gamma-irradiation. J Biomed Mater Res A 2007; 80:435-43. [PMID: 17013857 DOI: 10.1002/jbm.a.30913] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
An initial study showed that morselized human bone grafts were osteoconductive and osteoinductive when implanted in nude rat tibial window defects, and 25 kGy of gamma-irradiation significantly reduced those properties. The mechanism of the osteoinductivity and the influence of gamma-irradiation required further investigation. In this study we assessed the paraffin sections of seven morselized human bone grafts implanted into rat tibial defects for 3 weeks after being treated with 0, 15, or 25 kGy gamma-radiation respectively. Osteoclast-like cell counting and protein expressions of bone morphogenetic protein-7 (BMP-7), core binding factor alpha1 (CBFA1), and proliferating cell nuclear antigen (PCNA) were investigated and the positive signals were quantitatively analyzed. More new bone formation was observed in the 0 and 15 kGy groups compared with 25 kGy groups. The newly formed bones were found mainly from the intact cortex into the defects bridged by the implanted grafts. A dense staining of BMP-7 and CBFA1 was noted in the osteoblast-like cells in those areas. The BMP-7 and CBFA1 staining was also seen in the cells surrounding the implanted grafts in the centre areas of the defects in distance from the intact cortex. Quantitative analysis of immunohistochemical staining of the centre areas of the defects showed that gamma-irradiation (15 and 25 kGy) significantly reduced the expression of CBFA1 and BMP-7. In conclusion, morselized human bone grafts may contain some factors, which induced osteoblast lineage differentiation and bone formation and gamma-irradiation damages those bone inducing factors.
Collapse
Affiliation(s)
- J B Chen
- Surgical and Orthopaedic Research Laboratories, Prince of Wales Clinical School, University of New South Wales, Sydney, New South Wales 2031, Australia
| | | | | | | | | |
Collapse
|
28
|
Heckmann L, Schlenker HJ, Fiedler J, Brenner R, Dauner M, Bergenthal G, Mattes T, Claes L, Ignatius A. Human mesenchymal progenitor cell responses to a novel textured poly(L-lactide) scaffold for ligament tissue engineering. J Biomed Mater Res B Appl Biomater 2007; 81:82-90. [PMID: 16924614 DOI: 10.1002/jbm.b.30640] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Biocompatibility and cell seeding capability of a new cell scaffold made of textured polylactic acid (PLA) fibers was investigated as a new material for tissue engineering of anterior cruciate ligaments (ACL). Adhesion and proliferation of human mesenchymal progenitor cells (MPC) was investigated after 15 days by scanning electron microscopy and standard histology. Expression of collagen type I and III, fibronectin, tenascin C, decorin, smooth muscle actin, and the matrix metalloproteinases MMP-1 and MMP-2, as well as their tissue inhibitors TIMP-1 and TIMP-2 was analyzed using real-time PCR. Protein expression of collagen I and III, tenascin C, and proliferating nuclear antigen (PCNA) was determined by immunohistology. Apoptosis was analyzed by detection of p53 expression and TUNEL staining. MPC seeded the scaffold homogeneously and showed good cell growth and no increased rate of apoptosis. After 15 days, the matrix forming genes collagen type I, tenascin C, and decorin were upregulated, indicating the formation of a ligament-like matrix. MMP-1 and TIMP-1 were also significantly increased, suggesting initial matrix remodeling. It was concluded that the new porous PLA scaffold allowed homogeneous cell seeding, a fibroblastic phenotype and the production of a ligament-like matrix and, therefore, might be a suitable cell carrier for ACL tissue engineering.
Collapse
Affiliation(s)
- Leslie Heckmann
- Department of Orthopaedics, Division for Biochemistry of Joint and Connective Tissue Diseases, University of Ulm, Oberer Eselsberg 45, 89081 Ulm, Germany
| | | | | | | | | | | | | | | | | |
Collapse
|
29
|
Taatjes DJ, Zuber C, Roth J. The histochemistry and cell biology vade mecum: a review of 2005–2006. Histochem Cell Biol 2006; 126:743-88. [PMID: 17149649 DOI: 10.1007/s00418-006-0253-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/03/2006] [Indexed: 02/07/2023]
Abstract
The procurement of new knowledge and understanding in the ever expanding discipline of cell biology continues to advance at a breakneck pace. The progress in discerning the physiology of cells and tissues in health and disease has been driven to a large extent by the continued development of new probes and imaging techniques. The recent introduction of semi-conductor quantum dots as stable, specific markers for both fluorescence light microscopy and electron microscopy, as well as a virtual treasure-trove of new fluorescent proteins, has in conjunction with newly introduced spectral imaging systems, opened vistas into the seemingly unlimited possibilities for experimental design. Although it oftentimes proves difficult to predict what the future will hold with respect to advances in disciplines such as cell biology and histochemistry, it is facile to look back on what has already occurred. In this spirit, this review will highlight some advancements made in these areas in the past 2 years.
Collapse
Affiliation(s)
- Douglas J Taatjes
- Department of Pathology, Microscopy Imaging Center, College of Medicine, University of Vermont, Burlington, VT 05405, USA.
| | | | | |
Collapse
|
30
|
Bonafede A, Köhler T, Rodriguez-Niedenführ M, Brand-Saberi B. BMPs restrict the position of premuscle masses in the limb buds by influencing Tcf4 expression. Dev Biol 2006; 299:330-44. [PMID: 17005177 DOI: 10.1016/j.ydbio.2006.02.054] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2005] [Revised: 12/22/2005] [Accepted: 02/06/2006] [Indexed: 11/16/2022]
Abstract
Previous studies have shown the distally retreating source of Scatter factor/Hepatocyte growth factor (SF/HGF) can account for the distal migration of myogenic precursor cells in the limb bud mesenchyme. However, the normal expression pattern of Sf/Hgf alone does not explain the distribution of muscle precursor cells. Hence, the position of the dorsal and ventral premuscle masses suggests the presence of additional patterning factors. We present evidence that BMP2 and 4 can act as such factors by inhibiting the expression of Tcf4, a downstream element of the canonical Wnt pathway. The normal position of muscle cells depends on the correct distribution of BMP and SF/HGF throughout the limb bud mesenchyme. Removal or inhibition of the BMP signals within the limb margins leads to a shift in position resulting in the fusion of the dorsal and ventral premuscle masses towards the manipulated areas. In the absence of BMPs, mispositioning requires the presence of SF/HGF. Consequently, ectopic application of exogenous SF/HGF in the presence of BMP signals does not change muscle positioning. We conclude that correct positioning of the premuscle masses in the limb buds is controlled by the combined influence of SF/HGF signals--guiding cells mainly in the proximo-distal axis--and BMP signals that restrict the positioning to the dorsal and ventral central portions of the limb buds.
Collapse
Affiliation(s)
- Alexander Bonafede
- Institute of Anatomy and Cell Biology II, University of Freiburg, PO Box 111, D-79001 Freiburg, Germany
| | | | | | | |
Collapse
|
31
|
Zhang X, Dai F, Weise C, Yusuf F, Bonafede A, Morosan-Puopolo G, Rehimi R, Wang J, Brand-Saberi B. Expression of the avian gene cNOC2 encoding nucleolar complex associated protein 2 during embryonic development. ANATOMY AND EMBRYOLOGY 2006; 211:649-57. [PMID: 17013620 DOI: 10.1007/s00429-006-0115-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 08/11/2006] [Indexed: 11/28/2022]
Abstract
Genetic information that directs a cell during different phases of embryogenesis is locked up in the genome. Therein is contained the road map for growth, proliferation, differentiation and morphogenesis. The cellular transportation machinery plays a major role to ensure that all the components for transcription and translation are available at the right place at the right time. Nucleolar complex associated protein2 (NOC2) has a highly conserved UPF0120 domain, and is an element involved in ribosome transportation from the nucleoplasm to the cytoplasm. However, its gene expression pattern is still unknown. We chose the developing chick embryo to investigate the possible involvement of avian NOC2 (cNOC2) in developmental processes, particularly neurogenesis and myogenesis. For this purpose, we constructed a fragment of chicken cNOC2, which contains the UPF0120 domain coding sequence, into pDrive vector, and performed in situ hybridization on chicken embryos of different stages with this gene probe. A dynamic expression pattern of cNOC2 transcripts can be seen beginning as early as from stage HH7 until stage HH32. Using in situ hybridization we could detect that cNOC2 transcripts were expressed ubiquitously, but prominent expression could be found in the neural tissue, the somites and in the developing limbs. Comparison of cNOC2 gene expression with the proliferation marker gene cPCNA, muscle specific marker genes cMyf5 and cMyoD in single or double in situ hybridisation show that cNOC2 is expressed in the myotome, similar to cMyf5 and cMyoD, but not like cPCNA, which is hardly detectable in the myotome. Our results suggest that cNOC2 is involved in the development of neural tissue, somites and limbs.
Collapse
Affiliation(s)
- Xiaobing Zhang
- School of Life Science, Lanzhou University, 730000 Lanzhou, China
| | | | | | | | | | | | | | | | | |
Collapse
|
32
|
Yusuf F, Brand-Saberi B. The eventful somite: patterning, fate determination and cell division in the somite. ACTA ACUST UNITED AC 2006; 211 Suppl 1:21-30. [PMID: 17024302 DOI: 10.1007/s00429-006-0119-8] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2006] [Accepted: 08/18/2006] [Indexed: 11/29/2022]
Abstract
The segmental somites not only determine the vertebrate body plan, but also represent turntables of cell fates. The somite is initially naive in terms of its fate restriction as shown by grafting and rotation experiments whereby ectopically grafted or rotated tissue of newly formed somites yielded the same pattern of normal derivatives. Somitic derivatives are determined by local signalling between adjacent embryonic tissues, in particular the neural tube, notochord, surface ectoderm and the somitic compartments themselves. The correct spatio-temporal specification of the deriving tissues, skeletal muscle, cartilage, endothelia and connective tissue is achieved by a sequence of morphogenetic changes of the paraxial mesoderm, eventually leading to the three transitory somitic compartments: dermomyotome, myotome and sclerotome. These structures are specified along a double gradient from dorsal to ventral and from medial to lateral. The establishment and controlled disruption of the epithelial state of the somitic compartments are crucial for development. In this article, we give a synopsis of some of the most important signalling events involved in somite patterning and cell fate decisions. Particular emphasis has been laid on the issue of epithelio-mesenchymal transition and different types of cell division in the somite.
Collapse
Affiliation(s)
- Faisal Yusuf
- Institute of Anatomy and Cell Biology, Department of Molecular Embryology, University of Freiburg, Albertstrasse 17, 79104, Freiburg, Germany.
| | | |
Collapse
|
33
|
Fernández-Terán MA, Hinchliffe JR, Ros MA. Birth and death of cells in limb development: A mapping study. Dev Dyn 2006; 235:2521-37. [PMID: 16881063 DOI: 10.1002/dvdy.20916] [Citation(s) in RCA: 97] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
Cell death and cell proliferation are basic cellular processes that need to be precisely controlled during embryonic development. The developing vertebrate limb illustrates particularly well how correct morphogenesis depends on the appropriate spatial and temporal balance between cell death and cell proliferation. Precise knowledge of the patterns of cell proliferation and cell death during limb development is required to understand how their modifications may contribute to the generation of the great diversity of limb phenotypes that result from spontaneous mutations or induced genetic manipulations. We have performed a comprehensive analysis of the patterns of cell death, assayed by terminal deoxynucleotidyl transferase-mediated deoxyuridinetriphosphate nick end-labeling (TUNEL), and cell proliferation, assayed by anti-phosphorylated histone H3 immunohistochemistry, in consecutive sections of forelimbs and hindlimbs covering an extensive period of chick and mouse limb development. Our results confirm and expand previous reports and show common and specific areas of cell death for each species. Mitotic cells were found scattered in a uniform distribution across the early limb bud, with the exception of the areas of cell death in which mitotic cells were scarce. At later stages, mitotic cells were seen more abundantly in the digital tips. The aim of the present study was to satisfy the need for organized data sets describing these processes, which will allow the side-by-side comparison between the two major model organisms of limb development, i.e., the mouse and the chick.
Collapse
Affiliation(s)
- M A Fernández-Terán
- Departamento de Anatomía y Biología Celular, Facultad de Medicina, Universidad de Cantabria, Santander, Spain
| | | | | |
Collapse
|
34
|
Taatjes DJ, Roth J. Recent progress in histochemistry and cell biology: the state of the art 2005. Histochem Cell Biol 2005; 124:547-74. [PMID: 16283358 DOI: 10.1007/s00418-005-0110-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/26/2005] [Indexed: 10/25/2022]
Abstract
Advances in the field of histochemistry, a multidisciplinary area including the detection, localization and functional characterization of molecules in single cells and complex tissues, often drives the attainment of new knowledge in the broadly defined discipline of cell biology. These two disciplines, histochemistry and cell biology, have been joined in this journal to facilitate the flow of information with celerity from technical advancement in histochemical procedures, to their utilization in experimental models. This review summarizes advancements in these fields during the past year.
Collapse
Affiliation(s)
- Douglas J Taatjes
- Microscopy Imaging Center, Department of Pathology, College of Medicine, University of Vermont, Burlington, VT 05405, USA.
| | | |
Collapse
|