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Li J, Fu S, Tian Y, Zhang X, Meng Y, Zhao X, Liu S, Zhang Y, Sun J. A myogenic regulatory factor is required for myogenesis during limb regeneration in the Chinese mitten crab. Int J Biol Macromol 2024; 279:135024. [PMID: 39208909 DOI: 10.1016/j.ijbiomac.2024.135024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2024] [Revised: 08/14/2024] [Accepted: 08/21/2024] [Indexed: 09/04/2024]
Abstract
Myogenic regulatory factors (MRFs) are a group of transcription factors that regulate the activity of skeletal muscle cells during embryonic development and postnatal myogenesis in various vertebrate species. However, the role of MRFs in limb regeneration remains poorly understood in crustaceans. In this study, we identified a full-length cDNA encoding a myogenic regulatory factor from Eriocheir sinensis (EsMRF) and evaluated its mRNA expression profile during muscle development, growth, and regeneration. The expression of EsMRF was found to correlate with the onset of muscle formation during development and with the regeneration process following limb autotomy. To elucidate the function of MRF during limb regeneration in E. sinensis, we assessed regenerative efficiency using RNA interference (RNAi) targeting EsMRF. Our findings revealed that the blockade of MRF delayed limb regeneration by disrupting the proliferation and myogenesis of blastema cells at the basal growth stage. Furthermore, luciferase assays results demonstrated that EsMRF can transcriptionally activate target myogenic genes, either through direct binding to their promoters or by interacting with co-regulators such as EsHEB or EsMEF2. This study identifies a novel MRF in E. sinensis and elucidates its function during limb regeneration, thereby contributing to our understanding of muscle growth and regeneration mechanisms in crustaceans.
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Affiliation(s)
- Ju Li
- College of Life Science, Tianjin Normal University, Tianjin 300387, PR China; Tianjin Key Laboratory of Animal and Plant Resistance/College of Life Sciences, Tianjin Normal University, Tianjin 300387, PR China.
| | - Simiao Fu
- College of Life Science, Tianjin Normal University, Tianjin 300387, PR China
| | - Yuxin Tian
- College of Life Science, Tianjin Normal University, Tianjin 300387, PR China
| | - Xin Zhang
- College of Life Science, Tianjin Normal University, Tianjin 300387, PR China
| | - Yuxuan Meng
- College of Life Science, Tianjin Normal University, Tianjin 300387, PR China
| | - Xiumei Zhao
- College of Life Science, Tianjin Normal University, Tianjin 300387, PR China
| | - Sidi Liu
- College of Life Science, Tianjin Normal University, Tianjin 300387, PR China
| | - Yuxuan Zhang
- College of Life Science, Tianjin Normal University, Tianjin 300387, PR China
| | - Jinsheng Sun
- College of Life Science, Tianjin Normal University, Tianjin 300387, PR China; Tianjin Key Laboratory of Animal and Plant Resistance/College of Life Sciences, Tianjin Normal University, Tianjin 300387, PR China.
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2
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Cano-Martínez A, Rubio-Ruiz ME, Guarner-Lans V. Homeostasis and evolution in relation to regeneration and repair. J Physiol 2024; 602:2627-2648. [PMID: 38781025 DOI: 10.1113/jp284426] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2023] [Accepted: 05/01/2024] [Indexed: 05/25/2024] Open
Abstract
Homeostasis constitutes a key concept in physiology and refers to self-regulating processes that maintain internal stability when adjusting to changing external conditions. It diminishes internal entropy constituting a driving force behind evolution. Natural selection might act on homeostatic regulatory mechanisms and control mechanisms including homeodynamics, allostasis, hormesis and homeorhesis, where different stable stationary states are reached. Regeneration is under homeostatic control through hormesis. Damage to tissues initiates a response to restore the impaired equilibrium caused by mild stress using cell proliferation, cell differentiation and cell death to recover structure and function. Repair is a homeorhetic change leading to a new stable stationary state with decreased functionality and fibrotic scarring without reconstruction of the 3-D pattern. Mechanisms determining entrance of the tissue or organ to regeneration or repair include the balance between innate and adaptive immune cells in relation to cell plasticity and stromal stem cell responses, and redox balance. The regenerative and reparative capacities vary in different species, distinct tissues and organs, and at different stages of development including ageing. Many cell signals and pathways play crucial roles determining regeneration or repair by regulating protein synthesis, cellular growth, inflammation, proliferation, autophagy, lysosomal function, metabolism and metalloproteinase cell signalling. Attempts to favour the entrance of damaged tissues to regeneration in those with low proliferative rates have been made; however, there are evolutionary constraint mechanisms leading to poor proliferation of stem cells in unfavourable environments or tumour development. More research is required to better understand the regulatory processes of these mechanisms.
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Affiliation(s)
- Agustina Cano-Martínez
- Department of Physiology, Instituto Nacional de Cardiología Ignacio Chávez, México, México
| | | | - Verónica Guarner-Lans
- Department of Physiology, Instituto Nacional de Cardiología Ignacio Chávez, México, México
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Alibardi L. Immunolocalization of lix1 in the regenerating tail of lizard indicates that the protein is mainly present in the nervous tissue. Acta Histochem 2023; 125:152113. [PMID: 37948784 DOI: 10.1016/j.acthis.2023.152113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 11/02/2023] [Accepted: 11/03/2023] [Indexed: 11/12/2023]
Abstract
PURPOSE Lizard regeneration derives from the re-activation of a number of developmental genes after tail amputation. Among genes with the highest expression, as indicated from the transcriptome, is lix1 which functional role is not known. METHOD An antibody that cross-reacts with the lizard Podarcis muralis lix1 has been utilized to detect by immunofluorescence the sites of localization of the protein in the regenerating tail. RESULTS Lix1-protein is almost exclusively localized in the regenerating spinal cord (ependyma) and nerves growing into the blastema, in sparse blastema cells but is undetectable in other tissues. CONCLUSIONS Since the spinal cord is essential to stimulate tail regeneration it is hypothesized that the lix1 protein is part of the signaling or growing factors produced from the regenerating spinal cord that are needed for tail regeneration of the lizard tail.
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Affiliation(s)
- Lorenzo Alibardi
- Comparative Histolab Padova and Department of Biology of the University of Bologna, Italy.
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Greco N, Onisto M, Alibardi L. Protein extracts from regenerating lizard tail show an inhibitory effect on human cancer cells cultivated in-vitro. Ann Anat 2023; 250:152115. [PMID: 37315628 DOI: 10.1016/j.aanat.2023.152115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 05/21/2023] [Accepted: 05/22/2023] [Indexed: 06/16/2023]
Abstract
BACKGROUND accumulating evidence indicates that during tail regeneration in lizards the initial stage of regenerative blastema is a tumor-like proliferative outgrowth that rapidly elongates into a new tail composed of fully differentiated tissues. Both oncogenes and tumor-suppressors are expressed during regeneration, and it has been hypothesized that an efficient control of cell proliferation avoids that the blastema is turned into a tumor outgrowth. METHODS in order to determine whether functional tumor-suppressors are present in the growing blastema we have utilized protein extracts collected from early regenerating tails of 3-5 mm that have been tested for a potential anti-tumor effect on in-vitro culture by using cancer cell lines from human mammary gland (MDA-MB-231) and prostate cancer (DU145). RESULTS at specific dilutions, the extract determines a reduction of viability in cancer cells after 2-4 days of culture, as supported by statistical and morphological analyses. While control cells appear viable, treated cells result damaged and produce an intense cytoplasmic granulation and degeneration. CONCLUSIONS this negative effect on cell viability and proliferation is absent using tissues from the original tail supporting the hypothesis that only regenerating tissues synthesize tumor-suppressor molecules. The study suggests that the regenerating tail of lizard at the stages here selected contains some molecules that determine inhibition of cell viability on the cancer cells analyzed.
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Affiliation(s)
- Nicola Greco
- Department of Biomedical Science, University of Padova, Italy
| | - Maurizio Onisto
- Department of Biomedical Science, University of Padova, Italy
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Li J, Zuo J, Lv X, Ma J, Li X, Fu S, Sun J. Hedgehog signaling is essential in the regulation of limb regeneration in the Chinese mitten crab, Eriocheir sinensis. FISH & SHELLFISH IMMUNOLOGY 2023; 140:108981. [PMID: 37543149 DOI: 10.1016/j.fsi.2023.108981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 07/04/2023] [Accepted: 07/31/2023] [Indexed: 08/07/2023]
Abstract
Tissue autotomy is a unique adaptive response to environmental stress, followed by regeneration process compensating for the loss of body parts. The crustaceans present remarkable activity of appendage autotomy and regeneration, however, the molecular mechanism is still unclear. In this study, the Eriocheir sinensis Hedgehog (EsHH) and Smoothened (EsSMO) were identified in the regenerative limbs, and the function of Hedgehog signaling pathway on limb regeneration was evaluated. At the blastema growth stage of limb regeneration, the expression of EsHH and EsSMO was up-regulated in response to limb autotomy stress, and down-regulated at blastema differentiation stage. To clarify the effect of Hedgehog pathway during limb regeneration, the regenerative efficiency was evaluated with Smoothened inhibitor cyclopamine or RNAi (ds-HH) injection. We observed that the regenerative efficiency was significantly repressed with blockage of Hedgehog pathway at both the basal growth stage and the proecdysial growth stage, which was indicated by the delay of wound healing and blastema growth, as well as a decrease in the size of newly formed limbs. In addition, gene expression and BrdU incorporation assay showed that the proliferation and myogenic differentiation of blastema cells were suppressed with either cyclopamine or ds-HH injection. Thus, these results suggest that Hedgehog signaling pathway is essential for the establishment of limb regeneration in E. sinensis through promoting the proliferation and myogenic differentiation of blastema cells.
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Affiliation(s)
- Ju Li
- College of Life Science, Tianjin Normal University, Tianjin, 300387, China; Tianjin Key Laboratory of Animal and Plant Resistance, College of Life Sciences, Tianjin Normal University, Tianjin, 300387, PR China.
| | - Jinmei Zuo
- College of Life Science, Tianjin Normal University, Tianjin, 300387, China
| | - Xiaoyan Lv
- College of Life Science, Tianjin Normal University, Tianjin, 300387, China
| | - Jiahe Ma
- College of Life Science, Tianjin Normal University, Tianjin, 300387, China
| | - Xiaohong Li
- College of Life Science, Tianjin Normal University, Tianjin, 300387, China
| | - Simiao Fu
- College of Life Science, Tianjin Normal University, Tianjin, 300387, China
| | - Jinsheng Sun
- College of Life Science, Tianjin Normal University, Tianjin, 300387, China; Tianjin Key Laboratory of Animal and Plant Resistance, College of Life Sciences, Tianjin Normal University, Tianjin, 300387, PR China.
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6
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Vonk AC, Zhao X, Pan Z, Hudnall ML, Oakes CG, Lopez GA, Hasel-Kolossa SC, Kuncz AWC, Sengelmann SB, Gamble DJ, Lozito TP. Single-cell analysis of lizard blastema fibroblasts reveals phagocyte-dependent activation of Hedgehog-responsive chondrogenesis. Nat Commun 2023; 14:4489. [PMID: 37563130 PMCID: PMC10415409 DOI: 10.1038/s41467-023-40206-z] [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: 12/09/2022] [Accepted: 07/18/2023] [Indexed: 08/12/2023] Open
Abstract
Lizards cannot naturally regenerate limbs but are the closest known relatives of mammals capable of epimorphic tail regrowth. However, the mechanisms regulating lizard blastema formation and chondrogenesis remain unclear. Here, single-cell RNA sequencing analysis of regenerating lizard tails identifies fibroblast and phagocyte populations linked to cartilage formation. Pseudotime trajectory analyses suggest spp1+-activated fibroblasts as blastema cell sources, with subsets exhibiting sulf1 expression and chondrogenic potential. Tail blastema, but not limb, fibroblasts express sulf1 and form cartilage under Hedgehog signaling regulation. Depletion of phagocytes inhibits blastema formation, but treatment with pericytic phagocyte-conditioned media rescues blastema chondrogenesis and cartilage formation in amputated limbs. The results indicate a hierarchy of phagocyte-induced fibroblast gene activations during lizard blastema formation, culminating in sulf1+ pro-chondrogenic populations singularly responsive to Hedgehog signaling. These properties distinguish lizard blastema cells from homeostatic and injury-stimulated fibroblasts and indicate potential actionable targets for inducing regeneration in other species, including humans.
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Affiliation(s)
- Ariel C Vonk
- Department of Stem Cell Biology and Regenerative Medicine, Keck School of Medicine, University of Southern California, 1425 San Pablo St, Los Angeles, CA, 90033, USA
- Department of Orthopaedic Surgery, Keck School of Medicine, University of Southern California, 1540 Alcazar St, Los Angeles, CA, 90033, USA
| | - Xiaofan Zhao
- Molecular Genomics Core, USC Norris Comprehensive Cancer Center, Keck School of Medicine, University of Southern California, 1441 Eastlake Ave, Los Angeles, CA, 90033, USA
| | - Zheyu Pan
- Department of Stem Cell Biology and Regenerative Medicine, Keck School of Medicine, University of Southern California, 1425 San Pablo St, Los Angeles, CA, 90033, USA
- Department of Orthopaedic Surgery, Keck School of Medicine, University of Southern California, 1540 Alcazar St, Los Angeles, CA, 90033, USA
| | - Megan L Hudnall
- Department of Orthopaedic Surgery, Keck School of Medicine, University of Southern California, 1540 Alcazar St, Los Angeles, CA, 90033, USA
| | - Conrad G Oakes
- Department of Orthopaedic Surgery, Keck School of Medicine, University of Southern California, 1540 Alcazar St, Los Angeles, CA, 90033, USA
| | - Gabriela A Lopez
- Department of Stem Cell Biology and Regenerative Medicine, Keck School of Medicine, University of Southern California, 1425 San Pablo St, Los Angeles, CA, 90033, USA
| | - Sarah C Hasel-Kolossa
- Department of Stem Cell Biology and Regenerative Medicine, Keck School of Medicine, University of Southern California, 1425 San Pablo St, Los Angeles, CA, 90033, USA
| | - Alexander W C Kuncz
- Department of Orthopaedic Surgery, Keck School of Medicine, University of Southern California, 1540 Alcazar St, Los Angeles, CA, 90033, USA
| | - Sasha B Sengelmann
- Department of Orthopaedic Surgery, Keck School of Medicine, University of Southern California, 1540 Alcazar St, Los Angeles, CA, 90033, USA
| | - Darian J Gamble
- Department of Stem Cell Biology and Regenerative Medicine, Keck School of Medicine, University of Southern California, 1425 San Pablo St, Los Angeles, CA, 90033, USA
- Department of Orthopaedic Surgery, Keck School of Medicine, University of Southern California, 1540 Alcazar St, Los Angeles, CA, 90033, USA
| | - Thomas P Lozito
- Department of Stem Cell Biology and Regenerative Medicine, Keck School of Medicine, University of Southern California, 1425 San Pablo St, Los Angeles, CA, 90033, USA.
- Department of Orthopaedic Surgery, Keck School of Medicine, University of Southern California, 1540 Alcazar St, Los Angeles, CA, 90033, USA.
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7
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Rennolds CW, Bely AE. Integrative biology of injury in animals. Biol Rev Camb Philos Soc 2023; 98:34-62. [PMID: 36176189 PMCID: PMC10087827 DOI: 10.1111/brv.12894] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 07/29/2022] [Accepted: 08/02/2022] [Indexed: 01/12/2023]
Abstract
Mechanical injury is a prevalent challenge in the lives of animals with myriad potential consequences for organisms, including reduced fitness and death. Research on animal injury has focused on many aspects, including the frequency and severity of wounding in wild populations, the short- and long-term consequences of injury at different biological scales, and the variation in the response to injury within or among individuals, species, ontogenies, and environmental contexts. However, relevant research is scattered across diverse biological subdisciplines, and the study of the effects of injury has lacked synthesis and coherence. Furthermore, the depth of knowledge across injury biology is highly uneven in terms of scope and taxonomic coverage: much injury research is biomedical in focus, using mammalian model systems and investigating cellular and molecular processes, while research at organismal and higher scales, research that is explicitly comparative, and research on invertebrate and non-mammalian vertebrate species is less common and often less well integrated into the core body of knowledge about injury. The current state of injury research presents an opportunity to unify conceptually work focusing on a range of relevant questions, to synthesize progress to date, and to identify fruitful avenues for future research. The central aim of this review is to synthesize research concerning the broad range of effects of mechanical injury in animals. We organize reviewed work by four broad and loosely defined levels of biological organization: molecular and cellular effects, physiological and organismal effects, behavioural effects, and ecological and evolutionary effects of injury. Throughout, we highlight the diversity of injury consequences within and among taxonomic groups while emphasizing the gaps in taxonomic coverage, causal understanding, and biological endpoints considered. We additionally discuss the importance of integrating knowledge within and across biological levels, including how initial, localized responses to injury can lead to long-term consequences at the scale of the individual animal and beyond. We also suggest important avenues for future injury biology research, including distinguishing better between related yet distinct injury phenomena, expanding the subjects of injury research to include a greater variety of species, and testing how intrinsic and extrinsic conditions affect the scope and sensitivity of injury responses. It is our hope that this review will not only strengthen understanding of animal injury but will contribute to building a foundation for a more cohesive field of 'injury biology'.
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Affiliation(s)
- Corey W Rennolds
- Department of Biology, University of Maryland, College Park, MD, 20742, USA
| | - Alexandra E Bely
- Department of Biology, University of Maryland, College Park, MD, 20742, USA
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8
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Wang Y, Huang X, Zhou Q, Tian Y, Zuo J, Yuan Z, Liu Y, Li J, Sun J. Hippo Signaling Regulates Blastema Formation During Limb Regeneration in Chinese Mitten Crab (Eriocheir sinensis). MARINE BIOTECHNOLOGY (NEW YORK, N.Y.) 2023; 25:204-213. [PMID: 36586014 DOI: 10.1007/s10126-022-10194-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Accepted: 12/14/2022] [Indexed: 06/17/2023]
Abstract
Limb autotomy and regeneration are specific adaptations of crustaceans in response to external stress and attacks, which make them a suitable model to investigate the mechanism of organ regeneration in invertebrates. In this study, the Hippo gene of Eriocheir sinensis (EsHPO) was identified, and the effects of Hippo signaling on limb regeneration were evaluated. The expression of EsHPO and other key components of Hippo signaling was down-regulated during the basal growth phase in response to limb autotomy stress and then up-regulated during the proecdysial growth phase. The descending expression patterns of Hippo signal components were correlated with transcriptional activation of YKI and downstream target genes during the blastema formation stage, which suggested that Hippo signaling plays a key role during limb regeneration in E. sinensis. To further test the hypothesis, the transcription factor YKI was blocked via verteporfin injection after autotomy, which disrupted limb regeneration by repressing wound healing and preventing blastema emergence. Furthermore, our experiments revealed that the proliferation of blastema cells was blocked by verteporfin. In addition, the expression of genes related to ECM remodeling, cell cycle progression, and apoptosis resistance was down-regulated following the injection of verteporfin. Our findings therefore indicate that Hippo signaling is essential for successful wound healing and limb regeneration in E. sinensis by inducing ECM remodeling, as well as promoting the proliferation and repressing the apoptosis of blastema cells.
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Affiliation(s)
- Yiran Wang
- College of Life Science, Tianjin Normal University, Tianjin, 300387, China
| | - Xinrui Huang
- College of Life Science, Tianjin Normal University, Tianjin, 300387, China
| | - Qiao Zhou
- College of Life Science, Tianjin Normal University, Tianjin, 300387, China
| | - Yuxin Tian
- College of Life Science, Tianjin Normal University, Tianjin, 300387, China
| | - Jinmei Zuo
- College of Life Science, Tianjin Normal University, Tianjin, 300387, China
| | - Zengzhi Yuan
- College of Life Science, Tianjin Normal University, Tianjin, 300387, China
- Tianjin Key Laboratory of Animal and Plant Resistance/College of Life Sciences, Tianjin Normal University, Tianjin, 300387, People's Republic of China
| | - Yichen Liu
- College of Life Science, Tianjin Normal University, Tianjin, 300387, China
- Tianjin Key Laboratory of Animal and Plant Resistance/College of Life Sciences, Tianjin Normal University, Tianjin, 300387, People's Republic of China
| | - Ju Li
- College of Life Science, Tianjin Normal University, Tianjin, 300387, China.
- Tianjin Key Laboratory of Animal and Plant Resistance/College of Life Sciences, Tianjin Normal University, Tianjin, 300387, People's Republic of China.
| | - Jinsheng Sun
- College of Life Science, Tianjin Normal University, Tianjin, 300387, China.
- Tianjin Key Laboratory of Animal and Plant Resistance/College of Life Sciences, Tianjin Normal University, Tianjin, 300387, People's Republic of China.
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9
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Austin LE, Graham C, Vickaryous MK. Spontaneous neuronal regeneration in the forebrain of the leopard gecko (Eublepharis macularius) following neurochemical lesioning. Dev Dyn 2023; 252:186-207. [PMID: 35973979 DOI: 10.1002/dvdy.525] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Revised: 06/22/2022] [Accepted: 07/10/2022] [Indexed: 01/04/2023] Open
Abstract
BACKGROUND Neurogenesis is the ability to generate new neurons from resident stem/progenitor populations. Although often understood as a homeostatic process, several species of teleost fish, salamanders, and lacertid lizards are also capable of reactive neurogenesis, spontaneously replacing lost or damaged neurons. Here, we demonstrate that reactive neurogenesis also occurs in a distantly related lizard species, Eublepharis macularius, the leopard gecko. RESULTS To initiate reactive neurogenesis, the antimetabolite 3-acetylpyridine (3-AP) was administered. Four days following 3-AP administration there is a surge in neuronal cell death within a region of the forebrain known as the medial cortex (homolog of the mammalian hippocampal formation). Neuronal cell death is accompanied by a shift in resident microglial morphology and an increase neural stem/progenitor cell proliferation. By 30 days following 3-AP administration, the medial cortex was entirely repopulated by NeuN+ neurons. At the same time, local microglia have reverted to a resting state and cell proliferation by neural stem/progenitors has returned to levels comparable with uninjured controls. CONCLUSIONS Together, these data provide compelling evidence of reactive neurogenesis in leopard geckos, and indicate that the ability of lizards to spontaneously replace lost or damaged forebrain neurons is more taxonomically widespread and evolutionarily conserved than previously considered.
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Affiliation(s)
- Laura E Austin
- Department of Biomedical Sciences, Ontario Veterinary College, University of Guelph, Guelph, Ontario, Canada
| | - Chloe Graham
- Department of Biomedical Sciences, Ontario Veterinary College, University of Guelph, Guelph, Ontario, Canada
| | - Matthew K Vickaryous
- Department of Biomedical Sciences, Ontario Veterinary College, University of Guelph, Guelph, Ontario, Canada
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10
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González-Granero S, Font E, Desfilis E, Herranz-Pérez V, García-Verdugo JM. Adult neurogenesis in the telencephalon of the lizard Podarcis liolepis. Front Neurosci 2023; 17:1125999. [PMID: 36908795 PMCID: PMC9995892 DOI: 10.3389/fnins.2023.1125999] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Accepted: 02/07/2023] [Indexed: 02/25/2023] Open
Abstract
In adult lizards, new neurons are generated from neural stem cells in the ventricular zone of the lateral ventricles. These new neurons migrate and integrate into the main telencephalic subdivisions. In this work we have studied adult neurogenesis in the lizard Podarcis liolepis (formerly Podarcis hispanica) by administering [3H]-thymidine and bromodeoxyuridine as proliferation markers and euthanizing the animals at different survival times to determine the identity of progenitor cells and to study their lineage derivatives. After short survival times, only type B cells are labeled, suggesting that they are neural stem cells. Three days after administration, some type A cells are labeled, corresponding to recently formed neuroblasts. Type A cells migrate to their final destinations, where they differentiate into mature neurons and integrate into functional circuits. Our results after long survival periods suggest that, in addition to actively dividing type B cells, there is also a type B subpopulation with low proliferative activity. We also found that new neurons incorporated into the olfactory bulb are generated both in situ, in the walls of the anterior extension of the lateral ventricle of the olfactory bulbs, but also at more caudal levels, most likely in anterior levels of the sulcus ventralis/terminalis. These cells follow a tangential migration toward the olfactory bulbs where they integrate. We hypothesized that at least part of the newly generated neurons would undergo a specialization process over time. In support of this prediction, we found two neuronal populations in the cellular layer of the medial cortex, which we named type I and II neurons. At intermediate survival times (1 month) only type II neurons were labeled with [3H]-thymidine, while at longer survival times (3, 6, or 12 months) both type I and type II neurons were labeled. This study sheds light on the ultrastructural characteristics of the ventricular zone of P. liolepis as a neurogenic niche, and adds to our knowledge of the processes whereby newly generated neurons in the adult brain migrate and integrate into their final destinations.
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Affiliation(s)
- Susana González-Granero
- Laboratory of Comparative Neurobiology, Cavanilles Institute of Biodiversity and Evolutionary Biology, University of Valencia and CIBERNED-ISCIII, Valencia, Spain
| | - Enrique Font
- Ethology Lab, Cavanilles Institute of Biodiversity and Evolutionary Biology, University of Valencia, Valencia, Spain
| | - Ester Desfilis
- Laboratory of Evolutionary and Developmental Neurobiology, Department of Experimental Medicine, Lleida's Institute for Biomedical Research-Dr. Pifarré Foundation (IRBLleida), University of Lleida, Lleida, Spain
| | - Vicente Herranz-Pérez
- Laboratory of Comparative Neurobiology, Cavanilles Institute of Biodiversity and Evolutionary Biology, University of Valencia and CIBERNED-ISCIII, Valencia, Spain.,Department of Cell Biology, Functional Biology and Physical Anthropology, University of Valencia, Burjassot, Spain
| | - José Manuel García-Verdugo
- Laboratory of Comparative Neurobiology, Cavanilles Institute of Biodiversity and Evolutionary Biology, University of Valencia and CIBERNED-ISCIII, Valencia, Spain
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11
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Alibardi L. The regenerating tail of lizard transits through a tumour‐like stage represented by the regenerative blastema. ACTA ZOOL-STOCKHOLM 2022. [DOI: 10.1111/azo.12446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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12
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Radial Glia and Neuronal-like Ependymal Cells Are Present within the Spinal Cord of the Trunk (Body) in the Leopard Gecko (Eublepharis macularius). J Dev Biol 2022; 10:jdb10020021. [PMID: 35735912 PMCID: PMC9224675 DOI: 10.3390/jdb10020021] [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: 03/28/2022] [Revised: 05/12/2022] [Accepted: 05/20/2022] [Indexed: 11/28/2022] Open
Abstract
As is the case for many lizards, leopard geckos (Eublepharis macularius) can self-detach a portion of their tail to escape predation, and then regenerate a replacement complete with a spinal cord. Previous research has shown that endogenous populations of neural stem/progenitor cells (NSPCs) reside within the spinal cord of the original tail. In response to tail loss, these NSPCs are activated and contribute to regeneration. Here, we investigate whether similar populations of NSPCs are found within the spinal cord of the trunk (body). Using a long-duration 5-bromo-2′-deoxyuridine pulse-chase experiment, we determined that a population of cells within the ependymal layer are label-retaining following a 20-week chase. Tail loss does not significantly alter rates of ependymal cell proliferation within the trunk spinal cord. Ependymal cells of the trunk spinal cord express SOX2 and represent at least two distinct cell populations: radial glial-like (glial fibrillary acidic protein- and Vimentin-expressing) cells; and neuronal-like (HuCD-expressing) cells. Taken together, these data demonstrate that NSPCs of the trunk spinal cord closely resemble those of the tail and support the use of the tail spinal cord as a less invasive proxy for body spinal cord injury investigations.
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Avalos PN, Forsthoefel DJ. An Emerging Frontier in Intercellular Communication: Extracellular Vesicles in Regeneration. Front Cell Dev Biol 2022; 10:849905. [PMID: 35646926 PMCID: PMC9130466 DOI: 10.3389/fcell.2022.849905] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Accepted: 03/28/2022] [Indexed: 12/12/2022] Open
Abstract
Regeneration requires cellular proliferation, differentiation, and other processes that are regulated by secreted cues originating from cells in the local environment. Recent studies suggest that signaling by extracellular vesicles (EVs), another mode of paracrine communication, may also play a significant role in coordinating cellular behaviors during regeneration. EVs are nanoparticles composed of a lipid bilayer enclosing proteins, nucleic acids, lipids, and other metabolites, and are secreted by most cell types. Upon EV uptake by target cells, EV cargo can influence diverse cellular behaviors during regeneration, including cell survival, immune responses, extracellular matrix remodeling, proliferation, migration, and differentiation. In this review, we briefly introduce the history of EV research and EV biogenesis. Then, we review current understanding of how EVs regulate cellular behaviors during regeneration derived from numerous studies of stem cell-derived EVs in mammalian injury models. Finally, we discuss the potential of other established and emerging research organisms to expand our mechanistic knowledge of basic EV biology, how injury modulates EV biogenesis, cellular sources of EVs in vivo, and the roles of EVs in organisms with greater regenerative capacity.
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Affiliation(s)
- Priscilla N. Avalos
- Department of Cell Biology, College of Medicine, The University of Oklahoma Health Sciences Center, Oklahoma City, OK, United States
- Genes and Human Disease Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, United States
| | - David J. Forsthoefel
- Department of Cell Biology, College of Medicine, The University of Oklahoma Health Sciences Center, Oklahoma City, OK, United States
- Genes and Human Disease Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, United States
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Alibardi L. Immunohistochemistry Indicates That Persistent Inflammation Determines Failure of Tail, Limb and Finger Regeneration in the Lizard Podarcis muralis. Ann Anat 2022; 243:151940. [PMID: 35390473 DOI: 10.1016/j.aanat.2022.151940] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2021] [Revised: 02/04/2022] [Accepted: 03/17/2022] [Indexed: 10/18/2022]
Abstract
BACKGROUND The presence of white blood inflammatory cells in injured tissues and their effect on the process of organ regeneration in lizards has been assessed on tail, limb and digits. METHODS The present immunohistochemical survey analyzes the occurrence of CD68-labeled cells in lizard organs uncapable of regenerating tissues that exhibit strong inflammatory activity. RESULTS This marker mainly identifies macrophages and mast cells present in large number within tissues of injured limbs and digits. Also a high inflammation is associated with amputated tails that do not regenerate, derived from cauterization or infection of tissues of the tail stump. In the healing limbs and fingers at 12-20 days post-amputation, numerous CD68-labeled cells, most likely macrophages, are seen among superficial connective tissues and injured muscles and bones. These cells likely stimulate and give rise to scarring tissues and no regeneration of limb and fingers occurs. In the cauterized or in the infected tail stump a strong accumulation of CD68-positive mast cells and macrophages is observed, where they likely evoke epidermal coagulation, formation of scarring connective tissue, and loss of regeneration. CONCLUSIONS The present observations provide further cytological evidence that support the notion that a strong and lasting inflammatory condition impedes organ regeneration in specifically lizards and, more generally other vertebrates as well.
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Affiliation(s)
- Lorenzo Alibardi
- Comparative Histolab Padova, Dipartimento di Biologia, University of Bologna, via Selmi 3, 40126, BO, Italy
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15
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Alibardi L. Tail regeneration in the gecko
Sphaerodactylus argus
shows that the formation of an axial elastic skeleton is functional for the new tail. ACTA ZOOL-STOCKHOLM 2022. [DOI: 10.1111/azo.12416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Lorenzo Alibardi
- Department of Biology Comparative Histolab Padova The University of Bologna Bologna Italy
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16
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Abstract
BACKGROUND Regenerative aesthetics is an emerging branch of regenerative medicine with therapies aimed at recapturing youthful structure and function using the body's own systems. OBJECTIVE To introduce the field of regenerative aesthetics, and to explore themes and evidence surrounding current and emerging therapies in the field. MATERIALS AND METHODS A review of the literature was performed for each of the 3 pillars of regeneration; namely, stem cells, biochemical cues, and scaffolds. RESULTS Herein, we provide an overview of the field of regenerative aesthetics, a discussion surrounding the 3 pillars of regeneration, and an overview of the evidence supporting current and emerging therapeutic modalities that could play a pivotal role in the future of aesthetic treatments. CONCLUSION An enhanced understanding of this field can serve to further enhance our awareness about the regenerative effects of therapies we already offer, in addition to providing inspiration for future innovation.
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17
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Galván I, Schwartz TS, Garland T. Evolutionary physiology at 30+: Has the promise been fulfilled?: Advances in Evolutionary Physiology: Advances in Evolutionary Physiology. Bioessays 2021; 44:e2100167. [PMID: 34802161 DOI: 10.1002/bies.202100167] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2021] [Revised: 10/20/2021] [Accepted: 10/22/2021] [Indexed: 12/19/2022]
Abstract
Three decades ago, interactions between evolutionary biology and physiology gave rise to evolutionary physiology. This caused comparative physiologists to improve their research methods by incorporating evolutionary thinking. Simultaneously, evolutionary biologists began focusing more on physiological mechanisms that may help to explain constraints on and trade-offs during microevolutionary processes, as well as macroevolutionary patterns in physiological diversity. Here we argue that evolutionary physiology has yet to reach its full potential, and propose new avenues that may lead to unexpected advances. Viewing physiological adaptations in wild animals as potential solutions to human diseases offers enormous possibilities for biomedicine. New evidence of epigenetic modifications as mechanisms of phenotypic plasticity that regulate physiological traits may also arise in coming years, which may also represent an overlooked enhancer of adaptation via natural selection to explain physiological evolution. Synergistic interactions at these intersections and other areas will lead to a novel understanding of organismal biology.
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Affiliation(s)
- Ismael Galván
- Department of Evolutionary Ecology, National Museum of Natural Sciences, CSIC, Madrid, Spain
| | - Tonia S Schwartz
- Department of Biological Sciences, Auburn University, Auburn, Alabama, USA
| | - Theodore Garland
- Department of Evolution, Ecology, and Organismal Biology, University of California, Riverside, California, USA
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18
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Alibardi L. Introduction to the Study on Regeneration in Lizards as an Amniote Model of Organ Regeneration. J Dev Biol 2021; 9:51. [PMID: 34842730 PMCID: PMC8628930 DOI: 10.3390/jdb9040051] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Accepted: 11/16/2021] [Indexed: 11/17/2022] Open
Abstract
Initial observations on the regeneration of the tail in lizards were recorded in brief notes by Aristotle over 2000 years ago, as reported in his book, History of Animals (cited from [...].
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Affiliation(s)
- Lorenzo Alibardi
- Comparative Histolab Padova, 35100 Padova, Italy;
- Department of Biology, University of Bologna, Via Selmi 3, 40126 Bologna, Italy
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19
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Self-Control of Inflammation during Tail Regeneration of Lizards. J Dev Biol 2021; 9:jdb9040048. [PMID: 34842738 PMCID: PMC8629022 DOI: 10.3390/jdb9040048] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Revised: 10/29/2021] [Accepted: 10/31/2021] [Indexed: 12/22/2022] Open
Abstract
Lizards can spontaneously regenerate their lost tail without evoking excessive inflammation at the damaged site. In contrast, tissue/organ injury of its mammalian counterparts results in wound healing with a formation of a fibrotic scar due to uncontrolled activation of inflammatory responses. Unveiling the mechanism of self-limited inflammation occurring in the regeneration of a lizard tail will provide clues for a therapeutic alternative to tissue injury. The present review provides an overview of aspects of rapid wound healing and roles of antibacterial peptides, effects of leukocytes on the tail regeneration, self-blocking of the inflammatory activation in leukocytes, as well as inflammatory resistance of blastemal cells or immature somatic cells during lizard tail regeneration. These mechanistic insights of self-control of inflammation during lizard tail regeneration may lead in the future to the development of therapeutic strategies to fight injury-induced inflammation.
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20
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Alibardi L. Review. Limb regeneration in lizards under natural and experimental conditions with considerations on the induction of appendages regeneration in amniotes. Ann Anat 2021; 239:151844. [PMID: 34662737 DOI: 10.1016/j.aanat.2021.151844] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Revised: 10/04/2021] [Accepted: 10/04/2021] [Indexed: 10/20/2022]
Abstract
BACKGROUND Study on the failure of limb regeneration in lizards evidences the difficult problems met from amniotes to regenerate organs. Contrary to the tail, limb loss in terrestrial environment is generally fatal and no selection for its regeneration occurred during lizard evolution. METHODS Experimentally amputated limbs were fixed and embedded for microscopy. RESULTS After limb loss an intense inflammatory reaction occurs and immune cells are recruited underneath a wound epidermis, forming a vascularized granulation tissue. The regenerating epidermis takes 2-3 weeks to cover the limb stump since degenerating long bones must be excised first while a dense connective tissue is formed and no limb growth occurs. Cell proliferation occurs in granulation tissues and wound epidermis during the initial 2-3 weeks of wound healing but disappears later determining the arrest of growth. Transcriptome data indicates that the limb, contrary to the tail, activates numerous genes involved in inflammation, immunity and fibroplasia while down-regulates some proliferative and most myogenic genes. Attempts to stimulate limb regeneration, by implants of nervous tissues or growth factors such as FGFs only maintain proliferation for few weeks but eventually the scarring program prevails and only short outgrowths missing of autopodial elements are regenerated. CONCLUSIONS While lizard limbs show the typical scarring outcome of mammals, the comparison of genes activated in the regenerating tail has allowed identifying key genes implicated in organ regeneration in amniotes.
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Affiliation(s)
- Lorenzo Alibardi
- Comparative Histolab Padova and Department of Biology, University of Bologna, Italy.
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21
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Schwaner MJ, Hsieh ST, Braasch I, Bradley S, Campos CB, Collins CE, Donatelli CM, Fish FE, Fitch OE, Flammang BE, Jackson BE, Jusufi A, Mekdara PJ, Patel A, Swalla BJ, Vickaryous M, McGowan CP. Future Tail Tales: A Forward-Looking, Integrative Perspective on Tail Research. Integr Comp Biol 2021; 61:521-537. [PMID: 33999184 PMCID: PMC8680820 DOI: 10.1093/icb/icab082] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Synopsis Tails are a defining characteristic of chordates and show enormous diversity in function and shape. Although chordate tails share a common evolutionary and genetic-developmental origin, tails are extremely versatile in morphology and function. For example, tails can be short or long, thin or thick, and feathered or spiked, and they can be used for propulsion, communication, or balancing, and they mediate in predator-prey outcomes. Depending on the species of animal the tail is attached to, it can have extraordinarily multi-functional purposes. Despite its morphological diversity and broad functional roles, tails have not received similar scientific attention as, for example, the paired appendages such as legs or fins. This forward-looking review article is a first step toward interdisciplinary scientific synthesis in tail research. We discuss the importance of tail research in relation to five topics: (1) evolution and development, (2) regeneration, (3) functional morphology, (4) sensorimotor control, and (5) computational and physical models. Within each of these areas, we highlight areas of research and combinations of long-standing and new experimental approaches to move the field of tail research forward. To best advance a holistic understanding of tail evolution and function, it is imperative to embrace an interdisciplinary approach, re-integrating traditionally siloed fields around discussions on tail-related research.
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Affiliation(s)
- M J Schwaner
- Department of Ecology and Evolutionary Biology, University of California Irvine, Irvine, CA 92697, USA
| | - S T Hsieh
- Department of Biology, Temple University, Philadelphia, PA 19122, USA
| | - I Braasch
- Department of Integrative Biology and Program in Ecology, Evolution, and Behavior (EEB), Michigan State University, East Lansing, MI 48824, USA
| | - S Bradley
- Department of Biomedical Science, University of Guelph, Guelph N1G 2W1, Canada
| | - C B Campos
- Department of Biological Sciences, Sacramento State University, Sacramento, CA 95819, USA
| | - C E Collins
- Department of Biological Sciences, Sacramento State University, Sacramento, CA 95819, USA
| | - C M Donatelli
- Department of Biology, University of Ottawa, Ontario K1N 6N5, Canada
| | - F E Fish
- Department of Biology, West Chester University, West Chester, PA 19383, USA
| | - O E Fitch
- Department of Integrative Biology and Program in Ecology, Evolution, and Behavior (EEB), Michigan State University, East Lansing, MI 48824, USA
| | - B E Flammang
- Department of Biological Sciences, New Jersey Institute of Technology, Newark, NJ 07102, USA
| | - B E Jackson
- Department of Biological and Environmental Sciences, Longwood University, Farmville, VA 23909, USA
| | - A Jusufi
- Max Planck Institute for Intelligent Systems, Stuttgart 70569, Germany
| | - P J Mekdara
- National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD 20892, USA
| | - A Patel
- Department of Electrical Engineering, University of Cape Town, Cape Town 7701, South Africa
| | - B J Swalla
- Department of Biology, University of Washington, Seattle, WA 98195, USA
| | - M Vickaryous
- Department of Biomedical Science, University of Guelph, Guelph N1G 2W1, Canada
| | - C P McGowan
- Department of Integrative Anatomical Sciences, University of Southern California, Los Angeles, CA 90033, USA
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22
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Bradley SS, Howe E, Bailey CDC, Vickaryous MK. The dendrite arbor of Purkinje cells is altered following to tail regeneration in the leopard gecko. Integr Comp Biol 2021; 61:370-384. [PMID: 34038505 DOI: 10.1093/icb/icab098] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
Purkinje cells of the cerebellum have a complex arborized arrangement of dendrites and are amongst the most distinctive cell types of the nervous system. Although the neuromorphology of Purkinje cells has been well described for some mammals and teleost fish, for most vertebrates less is known. Here we used a modified Golgi-Cox method to investigate the neuromorphology of Purkinje cells from the lizard Eublepharis macularius, the leopard gecko. Using Sholl and Branch Structure Analyses, we sought to investigate whether the neuromorphology of gecko Purkinje cells was altered is response to tail loss and regeneration. Tail loss is an evolved mechanism commonly used by geckos to escape predation. Loss of the tail represents a significant and sudden change in body length and mass, which is only partially recovered as the tail is regenerated. We predicted that tail loss and regeneration would induce a quantifiable change in Purkinje cell dendrite arborization. Post hoc comparisons of Sholl analyses data showed that geckos with regenerated tails have significant changes in dendrite diameter and the number of dendrite intersections in regions corresponding to the position of parallel fiber synapses. We propose that the neuromorphological alterations observed in gecko Purkinje cells represent a compensatory response to tail regrowth, and perhaps a role in motor learning.
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Affiliation(s)
| | - Erika Howe
- Department of Human Health and Nutritional Sciences, University of Guelph, Canada
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23
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Arenas Gómez CM, Echeverri K. Salamanders: The molecular basis of tissue regeneration and its relevance to human disease. Curr Top Dev Biol 2021; 145:235-275. [PMID: 34074531 PMCID: PMC8186737 DOI: 10.1016/bs.ctdb.2020.11.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Salamanders are recognized for their ability to regenerate a broad range of tissues. They have also have been used for hundreds of years for classical developmental biology studies because of their large accessible embryos. The range of tissues these animals can regenerate is fascinating, from full limbs to parts of the brain or heart, a potential that is missing in humans. Many promising research efforts are working to decipher the molecular blueprints shared across the organisms that naturally have the capacity to regenerate different tissues and organs. Salamanders are an excellent example of a vertebrate that can functionally regenerate a wide range of tissue types. In this review, we outline some of the significant insights that have been made that are aiding in understanding the cellular and molecular mechanisms of tissue regeneration in salamanders and discuss why salamanders are a worthy model in which to study regenerative biology and how this may benefit research fields like regenerative medicine to develop therapies for humans in the future.
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Affiliation(s)
- Claudia Marcela Arenas Gómez
- Marine Biological Laboratory, Eugene Bell Center for Regenerative Biology and Tissue Engineering, University of Chicago, Woods Hole, MA, United States
| | - Karen Echeverri
- Marine Biological Laboratory, Eugene Bell Center for Regenerative Biology and Tissue Engineering, University of Chicago, Woods Hole, MA, United States.
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24
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Bradley SS, Howe E, Bent LR, Vickaryous MK. Cutaneous tactile sensitivity before and after tail loss and regeneration in the leopard gecko (Eublepharis macularius). J Exp Biol 2021; 224:jeb.234054. [DOI: 10.1242/jeb.234054] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Accepted: 01/20/2021] [Indexed: 12/23/2022]
Abstract
ABSTRACT
Amongst tetrapods, mechanoreceptors on the feet establish a sense of body placement and help to facilitate posture and biomechanics. Mechanoreceptors are necessary for stabilizing the body while navigating through changing terrains or responding to a sudden change in body mass and orientation. Lizards such as the leopard gecko (Eublepharis macularius) employ autotomy – a voluntary detachment of a portion of the tail – to escape predation. Tail autotomy represents a natural form of significant (and localized) mass loss. Semmes–Weinstein monofilaments were used to investigate the effect of tail autotomy (and subsequent tail regeneration) on tactile sensitivity of each appendage of the leopard gecko. Prior to autotomy, we identified site-specific differences in tactile sensitivity across the ventral surfaces of the hindlimbs, forelimbs and tail. Repeated monofilament testing of both control (tail-intact) and tail-loss geckos had a significant sensitization effect (i.e. decrease in tactile threshold, maintained over time) in all regions of interest except the palmar surfaces of the forelimbs in post-autotomy geckos, compared with baseline testing. Although the regenerated tail is not an exact replica of the original, tactile sensitivity is shown to be effectively restored at this site. Re-establishment of tactile sensitivity on the ventral surface of the regenerate tail points towards a (continued) role in predator detection.
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Affiliation(s)
- Stefanie S. Bradley
- Department of Biomedical Sciences, University of Guelph, Guelph, Ontario, N1G2W1, Canada
| | - Erika Howe
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Ontario, N1G2W1, Canada
| | - Leah R. Bent
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Ontario, N1G2W1, Canada
| | - Matthew K. Vickaryous
- Department of Biomedical Sciences, University of Guelph, Guelph, Ontario, N1G2W1, Canada
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25
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Transcriptomic and proteomic analysis of Hemidactylus frenatus during initial stages of tail regeneration. Sci Rep 2021; 11:3675. [PMID: 33574494 PMCID: PMC7878758 DOI: 10.1038/s41598-021-83283-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Accepted: 01/28/2021] [Indexed: 11/08/2022] Open
Abstract
Epimorphic regeneration of appendages is a complex and complete phenomenon found in selected animals. Hemidactylus frenatus, house gecko has the remarkable ability to regenerate the tail tissue upon autotomy involving epimorphic regeneration mechanism. This study has identified and evaluated the molecular changes at gene and protein level during the initial stages, i.e., during the wound healing and repair mechanism initiation stage of tail regeneration. Based on next generation transcriptomics and De novo analysis the transcriptome library of the gecko tail tissue was generated. A total of 254 genes and 128 proteins were found to be associated with the regeneration of gecko tail tissue upon amputation at 1, 2 and 5-day post amputation (dpa) against control, 0-dpa through differential transcriptomic and proteomic analysis. To authenticate the expression analysis, 50 genes were further validated involving RTPCR. 327 genes/proteins identified and mapped from the study showed association for Protein kinase A signaling, Telomerase BAG2 signaling, paxillin signaling, VEGF signaling network pathways based on network pathway analysis. This study empanelled list of transcriptome, proteome and the list of genes/proteins associated with the tail regeneration.
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26
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Talavera JB, Carriere A, Swierk L, Putman BJ. Tail autotomy is associated with boldness in male but not female water anoles. Behav Ecol Sociobiol 2021. [DOI: 10.1007/s00265-021-02982-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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27
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Daponte V, Tylzanowski P, Forlino A. Appendage Regeneration in Vertebrates: What Makes This Possible? Cells 2021; 10:cells10020242. [PMID: 33513779 PMCID: PMC7911911 DOI: 10.3390/cells10020242] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Revised: 01/18/2021] [Accepted: 01/22/2021] [Indexed: 12/26/2022] Open
Abstract
The ability to regenerate amputated or injured tissues and organs is a fascinating property shared by several invertebrates and, interestingly, some vertebrates. The mechanism of evolutionary loss of regeneration in mammals is not understood, yet from the biomedical and clinical point of view, it would be very beneficial to be able, at least partially, to restore that capability. The current availability of new experimental tools, facilitating the comparative study of models with high regenerative ability, provides a powerful instrument to unveil what is needed for a successful regeneration. The present review provides an updated overview of multiple aspects of appendage regeneration in three vertebrates: lizard, salamander, and zebrafish. The deep investigation of this process points to common mechanisms, including the relevance of Wnt/β-catenin and FGF signaling for the restoration of a functional appendage. We discuss the formation and cellular origin of the blastema and the identification of epigenetic and cellular changes and molecular pathways shared by vertebrates capable of regeneration. Understanding the similarities, being aware of the differences of the processes, during lizard, salamander, and zebrafish regeneration can provide a useful guide for supporting effective regenerative strategies in mammals.
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Affiliation(s)
- Valentina Daponte
- Biochemistry Unit, Department of Molecular Medicine, University of Pavia, via Taramelli 3/B, 27100 Pavia, Italy;
| | - Przemko Tylzanowski
- Skeletal Biology and Engineering Research Center, Department of Development and Regeneration, University of Leuven, 3000 Leuven, Belgium;
- Department of Biochemistry and Molecular Biology, Medical University of Lublin, 20-059 Lublin, Poland
| | - Antonella Forlino
- Biochemistry Unit, Department of Molecular Medicine, University of Pavia, via Taramelli 3/B, 27100 Pavia, Italy;
- Correspondence: ; Tel.: +39-0382-987235
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28
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Cadiz L, Jonz MG. A comparative perspective on lung and gill regeneration. ACTA ACUST UNITED AC 2020; 223:223/19/jeb226076. [PMID: 33037099 DOI: 10.1242/jeb.226076] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The ability to continuously grow and regenerate the gills throughout life is a remarkable property of fish and amphibians. Considering that gill regeneration was first described over one century ago, it is surprising that the underlying mechanisms of cell and tissue replacement in the gills remain poorly understood. By contrast, the mammalian lung is a largely quiescent organ in adults but is capable of facultative regeneration following injury. In the course of the past decade, it has been recognized that lungs contain a population of stem or progenitor cells with an extensive ability to restore tissue; however, despite recent advances in regenerative biology of the lung, the signaling pathways that underlie regeneration are poorly understood. In this Review, we discuss the common evolutionary and embryological origins shared by gills and mammalian lungs. These are evident in homologies in tissue structure, cell populations, cellular function and genetic pathways. An integration of the literature on gill and lung regeneration in vertebrates is presented using a comparative approach in order to outline the challenges that remain in these areas, and to highlight the importance of using aquatic vertebrates as model organisms. The study of gill regeneration in fish and amphibians, which have a high regenerative potential and for which genetic tools are widely available, represents a unique opportunity to uncover common signaling mechanisms that may be important for regeneration of respiratory organs in all vertebrates. This may lead to new advances in tissue repair following lung disease.
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Affiliation(s)
- Laura Cadiz
- Department of Biology, University of Ottawa, 30 Marie Curie Pvt., Ottawa, ON, Canada, K1N 6N5
| | - Michael G Jonz
- Department of Biology, University of Ottawa, 30 Marie Curie Pvt., Ottawa, ON, Canada, K1N 6N5
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29
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Beatty AE, Schwartz TS. Gene expression of the IGF hormones and IGF binding proteins across time and tissues in a model reptile. Physiol Genomics 2020; 52:423-434. [PMID: 32776803 PMCID: PMC7509249 DOI: 10.1152/physiolgenomics.00059.2020] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Revised: 07/30/2020] [Accepted: 08/03/2020] [Indexed: 12/16/2022] Open
Abstract
The insulin and insulin-like signaling (IIS) network regulates cellular processes including pre- and postnatal growth, cellular development, wound healing, reproduction, and longevity. Despite their importance in the physiology of vertebrates, the study of the specific functions of the top regulators of the IIS network, insulin-like growth factors (IGFs) and IGF binding proteins (IGFBPs), has been mostly limited to a few model organisms. To expand our understanding of this network, we performed quantitative gene expression of IGF hormones in liver and qualitative expression of IGFBPs across tissues and developmental stages in a model reptile, the brown anole lizard (Anolis sagrei). We found that lizards express IGF2 across all life stages (preoviposition embryos to adulthood) and at a higher level than IGF1, which is opposite to patterns seen in laboratory rodents but similar to those seen in humans and other vertebrate models. IGFBP expression was ubiquitous across tissues (brain, gonad, heart, liver, skeletal muscle, tail, and regenerating tail) in adults, apart from IGFBP5, which was variable. These findings provide an essential foundation for further developing the anole lizard as a physiological and biomedical reptile model, as well as expanding our understanding of the function of the IIS network across species.
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Affiliation(s)
- Abby E Beatty
- Department of Biological Sciences, Auburn University, Auburn, Alabama
| | - Tonia S Schwartz
- Department of Biological Sciences, Auburn University, Auburn, Alabama
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30
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Alibardi L. Appendage regeneration in anamniotes utilizes genes active during larval-metamorphic stages that have been lost or altered in amniotes: The case for studying lizard tail regeneration. J Morphol 2020; 281:1358-1381. [PMID: 32865265 DOI: 10.1002/jmor.21251] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2020] [Revised: 07/20/2020] [Accepted: 07/25/2020] [Indexed: 12/17/2022]
Abstract
This review elaborates the idea that organ regeneration derives from specific evolutionary histories of vertebrates. Regenerative ability depends on genomic regulation of genes specific to the life-cycles that have differentially evolved in anamniotes and amniotes. In aquatic environments, where fish and amphibians live, one or multiple metamorphic transitions occur before the adult stage is reached. Each transition involves the destruction and remodeling of larval organs that are replaced with adult organs. After organ injury or loss in adult anamniotes, regeneration uses similar genes and developmental process than those operating during larval growth and metamorphosis. Therefore, the broad presence of regenerative capability across anamniotes is possible because generating new organs is included in their life history at metamorphic stages. Soft hyaluronate-rich regenerative blastemas grow in submersed or in hydrated environments, that is, essential conditions for regeneration, like during development. In adult anamniotes, the ability to regenerate different organs decreases in comparison to larval stages and becomes limited during aging. Comparisons of genes activated during metamorphosis and regeneration in anamniotes identify key genes unique to these processes, and include thyroid, wnt and non-coding RNAs developmental pathways. In the terrestrial environment, some genes or developmental pathways for metamorphic transitions were lost during amniote evolution, determining loss of regeneration. Among amniotes, the formation of soft and hydrated blastemas only occurs in lizards, a morphogenetic process that evolved favoring their survival through tail autotomy, leading to a massive although imperfect regeneration of the tail. Deciphering genes activity during lizard tail regeneration would address future attempts to recreate in other amniotes regenerative blastemas that grow into variably completed organs.
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31
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Grinham LR, Norman DB. The relationship between body shape, body size and locomotor mode in extant lepidosaurs. J Zool (1987) 2020. [DOI: 10.1111/jzo.12771] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- L. R. Grinham
- Department of Earth Sciences University of Cambridge Cambridge UK
| | - D. B. Norman
- Department of Earth Sciences University of Cambridge Cambridge UK
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32
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Barr JI, Somaweera R, Godfrey SS, Gardner MG, Bateman PW. When one tail isn't enough: abnormal caudal regeneration in lepidosaurs and its potential ecological impacts. Biol Rev Camb Philos Soc 2020; 95:1479-1496. [PMID: 32583608 DOI: 10.1111/brv.12625] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 05/22/2020] [Accepted: 05/25/2020] [Indexed: 11/29/2022]
Abstract
Abnormal caudal regeneration, the production of additional tails through regeneration events, occurs in lepidosaurs as a result of incomplete autotomy or sufficient caudal wound. Despite being widely known to occur, documented events generally are limited to opportunistic single observations - hindering the understanding of the ecological importance of caudal regeneration. Here we compiled and reviewed a robust global database of both peer-reviewed and non-peer reviewed records of abnormal regeneration events in lepidosaurs published over the last 400 years. Using this database, we qualitatively and quantitatively assessed the occurrence and characteristics of abnormal tail regeneration among individuals, among species, and among populations. We identified 425 observations from 366 records pertaining to 175 species of lepidosaurs across 22 families from 63 different countries. At an individual level, regenerations ranged from bifurcations to hexafurcations; from normal regeneration from the original tail to multiple regenerations arising from a single point; and from growth from the distal third to the proximal third of the tail. Species showing abnormal regenerations included those with intra-vertebral, inter-vertebral or no autotomy planes, indicating that abnormal regenerations evidently occur across lepidosaurs regardless of whether the species demonstrates caudal autotomy or not. Within populations, abnormal regenerations were estimated at a mean ± SD of 2.75 ± 3.41% (range 0.1-16.7%). There is a significant lack of experimental studies to understand the potential ecological impacts of regeneration on the fitness and life history of individuals and populations. We hypothesised that abnormal regeneration may affect lepidosaurs via influencing kinematics of locomotion, restrictions in escape mechanisms, anti-predation tactics, and intra- and inter-specific signalling. Behaviourally testing these hypotheses would be an important future research direction.
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Affiliation(s)
- James I Barr
- Behavioural Ecology Laboratory, School of Molecular and Life Sciences, Curtin University, Kent Street, Bentley, WA, 6102, Australia.,CSIRO Health and Biosecurity, 147 Underwood Avenue, Floreat, WA, 6014, Australia
| | - Ruchira Somaweera
- CSIRO Health and Biosecurity, 147 Underwood Avenue, Floreat, WA, 6014, Australia
| | - Stephanie S Godfrey
- Department of Zoology, University of Otago, 340 Great King Street, North Dunedin, Dunedin, 9016, New Zealand
| | - Michael G Gardner
- College of Science and Engineering, Flinders University, Sturt Road, Bedford Park, SA, 5042, Australia.,The Evolutionary Biology Unit, South Australian Museum, North Terrace, Adelaide, SA, 5000, Australia
| | - Philip W Bateman
- Behavioural Ecology Laboratory, School of Molecular and Life Sciences, Curtin University, Kent Street, Bentley, WA, 6102, Australia
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Cigliola V, Becker CJ, Poss KD. Building bridges, not walls: spinal cord regeneration in zebrafish. Dis Model Mech 2020; 13:13/5/dmm044131. [PMID: 32461216 PMCID: PMC7272344 DOI: 10.1242/dmm.044131] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Spinal cord injury is a devastating condition in which massive cell death and disruption of neural circuitry lead to long-term chronic functional impairment and paralysis. In mammals, spinal cord tissue has minimal capacity to regenerate after injury. In stark contrast, the regeneration of a completely transected spinal cord and accompanying reversal of paralysis in adult zebrafish is arguably one of the most spectacular biological phenomena in nature. Here, we review reports from the last decade that dissect the mechanisms of spinal cord regeneration in zebrafish. We highlight recent progress as well as areas requiring emphasis in a line of study that has great potential to uncover strategies for human spinal cord repair. Summary: Unlike mammals, teleost fish are capable of efficient, spontaneous recovery after a paralyzing spinal cord injury. Here, we highlight the major events through which laboratory model zebrafish regenerate spinal cord tissue.
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Affiliation(s)
- Valentina Cigliola
- Department of Cell Biology, Duke University Medical Center, Durham, NC 27710, USA.,Regeneration Next, Duke University, Durham, NC 27710, USA
| | - Clayton J Becker
- Department of Cell Biology, Duke University Medical Center, Durham, NC 27710, USA.,Regeneration Next, Duke University, Durham, NC 27710, USA
| | - Kenneth D Poss
- Department of Cell Biology, Duke University Medical Center, Durham, NC 27710, USA .,Regeneration Next, Duke University, Durham, NC 27710, USA
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Hoekstra LA, Schwartz TS, Sparkman AM, Miller DAW, Bronikowski AM. The untapped potential of reptile biodiversity for understanding how and why animals age. Funct Ecol 2020; 34:38-54. [PMID: 32921868 PMCID: PMC7480806 DOI: 10.1111/1365-2435.13450] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Accepted: 09/03/2019] [Indexed: 12/12/2022]
Abstract
1. The field of comparative aging biology has greatly expanded in the past 20 years. Longitudinal studies of populations of reptiles with a range of maximum lifespans have accumulated and been analyzed for evidence of mortality senescence and reproductive decline. While not as well represented in studies of amniote senescence, reptiles have been the subjects of many recent demographic and mechanistic studies of the biology of aging. 2. We review recent literature on reptile demographic senescence, mechanisms of senescence, and identify unanswered questions. Given the ecophysiological and demographic diversity of reptiles, what is the expected range of reptile senescence rates? Are known mechanisms of aging in reptiles consistent with canonical hallmarks of aging in model systems? What are the knowledge gaps in our understanding of reptile aging? 3. We find ample evidence of increasing mortality with advancing age in many reptiles. Testudines stand out as slower aging than other orders, but data on crocodilians and tuatara are sparse. Sex-specific analyses are generally not available. Studies of female reproduction suggest that reptiles are less likely to have reproductive decline with advancing age than mammals. 4. Reptiles share many physiological and molecular pathways of aging with mammals, birds, and laboratory model organisms. Adaptations related to stress physiology coupled with reptilian ectothermy suggest novel comparisons and contrasts that can be made with canonical aging phenotypes in mammals. These include stem cell and regeneration biology, homeostatic mechanisms, IIS/TOR signaling, and DNA repair. 5. To overcome challenges to the study of reptile aging, we recommend extending and expanding long-term monitoring of reptile populations, developing reptile cell lines to aid cellular biology, conducting more comparative studies of reptile morphology and physiology sampled along relevant life-history axes, and sequencing more reptile genomes for comparative genomics. Given the diversity of reptile life histories and adaptations, achieving these directives will likely greatly benefit all aging biology.
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Affiliation(s)
- Luke A Hoekstra
- Department of Ecology, Evolution, and Organismal Biology, Iowa State University, Ames, Iowa, 50010, USA
| | - Tonia S Schwartz
- Department of Biological Sciences, Auburn University, Auburn, Alabama 36849, USA
| | - Amanda M Sparkman
- Department of Biology, Westmont College, Santa Barbara, California, 93108, USA
| | - David A W Miller
- Department of Ecosystem Science and Management, Pennsylvania State University, University Park, PA 16802, USA
| | - Anne M Bronikowski
- Department of Ecology, Evolution, and Organismal Biology, Iowa State University, Ames, Iowa, 50010, USA
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Xu M, Wang T, Li W, Wang Y, Xu Y, Mao Z, Wu R, Liu M, Liu Y. PGE2 facilitates tail regeneration via activation of Wnt signaling in Gekko japonicus. J Mol Histol 2019; 50:551-562. [PMID: 31535259 DOI: 10.1007/s10735-019-09847-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Accepted: 09/10/2019] [Indexed: 12/26/2022]
Abstract
Tail regeneration is a distinguishing feature of lizards; however, the mechanisms underlying tail regeneration remain elusive. Prostaglandin E2 (PGE2) is an arachidonic acid metabolite that has been extensively investigated in the inflammatory response under both physiological and pathological conditions. PGE2 also act as a regulator of hematopoietic stem cell homeostasis by interacting with Wnt signaling molecules. The present study aims to identify the effects of PGE2 on tail regeneration and the molecular mechanisms behind it. We initially found that PGE2 levels increased during the early stages of tail regeneration, accompanied by the up-regulated expression of cyclooxygenase 1 and cyclooxygenase 2. Next, we demonstrated that reduced PGE2 production leads to the retardation of tail regeneration. Subsequent experiments demonstrated that this effect is likely mediated by Wnt signaling, which proposing that the activation of the Wnt pathway is essential for the initiation of regeneration. The results showed that inhibition of PGE2 production could suppress Wnt activation and inhibit the proliferation of both epithelial and blastema cells. Furthermore, our findings indicated that forced activation of Wnt signaling could rescue the inhibitory effect of Cox antagonist on regeneration, suggesting a positive role of PGE2 on tail regeneration via a non-inflammatory mechanism.
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Affiliation(s)
- Man Xu
- Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Co-Innovation Center of Neuroregeneration, Nantong University, Nantong, 226001, Jiangsu Province, China
| | - Tiantian Wang
- Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Co-Innovation Center of Neuroregeneration, Nantong University, Nantong, 226001, Jiangsu Province, China
| | - Wenjuan Li
- Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Co-Innovation Center of Neuroregeneration, Nantong University, Nantong, 226001, Jiangsu Province, China
| | - Yin Wang
- Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Co-Innovation Center of Neuroregeneration, Nantong University, Nantong, 226001, Jiangsu Province, China
| | - Yanran Xu
- Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Co-Innovation Center of Neuroregeneration, Nantong University, Nantong, 226001, Jiangsu Province, China
| | - Zuming Mao
- Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Co-Innovation Center of Neuroregeneration, Nantong University, Nantong, 226001, Jiangsu Province, China
| | - Ronghua Wu
- Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Co-Innovation Center of Neuroregeneration, Nantong University, Nantong, 226001, Jiangsu Province, China
| | - Mei Liu
- Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Co-Innovation Center of Neuroregeneration, Nantong University, Nantong, 226001, Jiangsu Province, China
| | - Yan Liu
- Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Co-Innovation Center of Neuroregeneration, Nantong University, Nantong, 226001, Jiangsu Province, China.
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36
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Miller BM, Johnson K, Whited JL. Common themes in tetrapod appendage regeneration: a cellular perspective. EvoDevo 2019; 10:11. [PMID: 31236203 PMCID: PMC6572735 DOI: 10.1186/s13227-019-0124-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Accepted: 06/08/2019] [Indexed: 01/13/2023] Open
Abstract
Complete and perfect regeneration of appendages is a process that has fascinated and perplexed biologists for centuries. Some tetrapods possess amazing regenerative abilities, but the regenerative abilities of others are exceedingly limited. The reasons underlying these differences have largely remained mysterious. A great deal has been learned about the morphological events that accompany successful appendage regeneration, and a handful of experimental manipulations can be reliably applied to block the process. However, only in the last decade has the goal of attaining a thorough molecular and cellular biological understanding of appendage regeneration in tetrapods become within reach. Advances in molecular and genetic tools for interrogating these remarkable events are now allowing for unprecedented access to the fundamental biology at work in appendage regeneration in a variety of species. This information will be critical for integrating the large body of detailed observations from previous centuries with a modern understanding of how cells sense and respond to severe injury and loss of body parts. Understanding commonalities between regenerative modes across diverse species is likely to illuminate the most important aspects of complex tissue regeneration.
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Affiliation(s)
- Bess M. Miller
- Department of Stem Cell and Regenerative Biology, Harvard University, 7 Divinity Ave, Cambridge, MA 02138 USA
| | - Kimberly Johnson
- Department of Stem Cell and Regenerative Biology, Harvard University, 7 Divinity Ave, Cambridge, MA 02138 USA
| | - Jessica L. Whited
- Department of Stem Cell and Regenerative Biology, Harvard University, 7 Divinity Ave, Cambridge, MA 02138 USA
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37
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Luís C, Rodrigues I, Guerreiro SG, Fernandes R, Soares R. Regeneration in the Podarcis bocagei model organism: a comprehensive immune-/histochemical analysis of the tail. ZOOMORPHOLOGY 2019. [DOI: 10.1007/s00435-019-00452-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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38
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Lian BW, Wu Q, Zhang SY, Li YM, Zhao XH, Mei WJ, Wang BG. Tissue regeneration promotion effects of phenanthroimidazole derivatives through pro-inflammatory pathway activation. FISH & SHELLFISH IMMUNOLOGY 2018; 80:582-591. [PMID: 29920383 DOI: 10.1016/j.fsi.2018.06.029] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Revised: 06/10/2018] [Accepted: 06/14/2018] [Indexed: 06/08/2023]
Abstract
A chemotherapeutic drug exerts favorable antitumor activity and simultaneously exhibits expectable inhibition on wound healing process. Phenanthroimidazole derivatives possess potent anticancer activity. However, only a few studies focused on the discovery of its potential effects on promoting tissue regeneration. In this study, four novel phenanthroimidazole derivatives were synthesized and characterized, and they exhibited evident inhibition on different tumor cells; compound 3 is the most active one. Moreover, 3 can promote wound healing of zebrafish in a dose-dependent manner. Further study demonstrated that 3 promoted the recruitment of inflammatory cells, formation of angiogenesis, and generation of reactive oxygen species and also influenced the motor behavior of zebrafish. Results indicated that 3 can accelerate the occurrence of pro-inflammation, angiogenesis, oxidative stress, and innervation, which play key roles in the facilitation of wound healing. Therefore, 3 can act as a bifunctional drug in inhibiting tumor and promoting tissue regeneration.
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Affiliation(s)
- Bo-Wen Lian
- School of Public Health, Guangdong Pharmaceutical University, Guangzhou, 510310, Guangdong Province, PR China
| | - Qiong Wu
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, 510006, Guangdong Province, PR China.
| | - Shuang-Yan Zhang
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, 510006, Guangdong Province, PR China
| | - Yu-Mei Li
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, 510006, Guangdong Province, PR China
| | - Xuan-Hao Zhao
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, 510006, Guangdong Province, PR China
| | - Wen-Jie Mei
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, 510006, Guangdong Province, PR China; Guangdong Province Engineering Technology Centre for Molecular Probe and Biomedicine Imaging, Guangzhou, 510006, Guangdong Province, PR China.
| | - Bao-Guo Wang
- School of Public Health, Guangdong Pharmaceutical University, Guangzhou, 510310, Guangdong Province, PR China; Guangdong Province Engineering Technology Centre for Molecular Probe and Biomedicine Imaging, Guangzhou, 510006, Guangdong Province, PR China.
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39
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McDonald RP, Vickaryous MK. Evidence for neurogenesis in the medial cortex of the leopard gecko, Eublepharis macularius. Sci Rep 2018; 8:9648. [PMID: 29941970 PMCID: PMC6018638 DOI: 10.1038/s41598-018-27880-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2018] [Accepted: 06/12/2018] [Indexed: 12/23/2022] Open
Abstract
Although lizards are often described as having robust neurogenic abilities, only a handful of the more than 6300 species have been explored. Here, we provide the first evidence of homeostatic neurogenesis in the leopard gecko (Eublepharis macularius). We focused our study on the medial cortex, homologue of the mammalian hippocampal formation. Using immunostaining, we identified proliferating pools of neural stem/progenitor cells within the sulcus septomedialis, the pseudostratified ventricular zone adjacent to the medial cortex. Consistent with their identification as radial glia, these cells expressed SOX2, glial fibrillary acidic protein, and Vimentin, and demonstrated a radial morphology. Using a 5-bromo-2′-deoxyuridine cell tracking strategy, we determined that neuroblast migration from the ventricular zone to the medial cortex takes ~30-days, and that newly generated neuronal cells survived for at least 140-days. We also found that cell proliferation within the medial cortex was not significantly altered following rupture of the tail spinal cord (as a result of the naturally evolved process of caudal autotomy). We conclude that the sulcus septomedialis of the leopard gecko demonstrates all the hallmarks of a neurogenic niche.
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Affiliation(s)
- Rebecca P McDonald
- Department of Biomedical Sciences, Ontario Veterinary College, University of Guelph, Guelph, Ontario, Canada
| | - Matthew K Vickaryous
- Department of Biomedical Sciences, Ontario Veterinary College, University of Guelph, Guelph, Ontario, Canada.
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Vibert L, Daulny A, Jarriault S. Wound healing, cellular regeneration and plasticity: the elegans way. THE INTERNATIONAL JOURNAL OF DEVELOPMENTAL BIOLOGY 2018; 62:491-505. [PMID: 29938761 PMCID: PMC6161810 DOI: 10.1387/ijdb.180123sj] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Regeneration and wound healing are complex processes that allow organs and tissues to regain their integrity and functionality after injury. Wound healing, a key property of epithelia, involves tissue closure that in some cases leads to scar formation. Regeneration, a process rather limited in mammals, is the capacity to regrow (parts of) an organ or a tissue, after damage or amputation. What are the properties of organs and the features of tissue permitting functional regrowth and repair? What are the cellular and molecular mechanisms underlying these processes? These questions are crucial both in fundamental and applied contexts, with important medical implications. The mechanisms and cells underlying tissue repair have thus been the focus of intense investigation. The last decades have seen rapid progress in the domain and new models emerging. Here, we review the fundamental advances and the perspectives that the use of C. elegans as a model have brought to the mechanisms of wound healing and cellular plasticity, axon regeneration and transdifferentiation in vivo.
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Affiliation(s)
- Laura Vibert
- Department of Development and Stem Cells, IGBMC (Institut de Génétique et de Biologie Moléculaire et Cellulaire), CNRS UMR 7104/INSERM U1258, Université de Strasbourg, Strasbourg, France
| | - Anne Daulny
- Department of Development and Stem Cells, IGBMC (Institut de Génétique et de Biologie Moléculaire et Cellulaire), CNRS UMR 7104/INSERM U1258, Université de Strasbourg, Strasbourg, France
| | - Sophie Jarriault
- Department of Development and Stem Cells, IGBMC (Institut de Génétique et de Biologie Moléculaire et Cellulaire), CNRS UMR 7104/INSERM U1258, Université de Strasbourg, Strasbourg, France
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