1
|
Gigante ED, Piekarz KM, Gurgis A, Cohen L, Razy-Krajka F, Popsuj S, Johnson CJ, Ali HS, Mohana Sundaram S, Stolfi A. Specification and survival of post-metamorphic branchiomeric neurons in a non-vertebrate chordate. Development 2024; 151:dev202719. [PMID: 38895900 PMCID: PMC11273300 DOI: 10.1242/dev.202719] [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: 01/22/2024] [Accepted: 06/10/2024] [Indexed: 06/21/2024]
Abstract
Tunicates are the sister group to the vertebrates, yet most species have a life cycle split between swimming larva and sedentary adult phases. During metamorphosis, larval neurons are replaced by adult-specific ones. The regulatory mechanisms underlying this replacement remain largely unknown. Using tissue-specific CRISPR/Cas9-mediated mutagenesis in the tunicate Ciona, we show that orthologs of conserved hindbrain and branchiomeric neuron regulatory factors Pax2/5/8 and Phox2 are required to specify the 'neck', a cellular compartment set aside in the larva to give rise to cranial motor neuron-like neurons post-metamorphosis. Using bulk and single-cell RNA-sequencing analyses, we characterize the transcriptome of the neck downstream of Pax2/5/8. We present evidence that neck-derived adult ciliomotor neurons begin to differentiate in the larva and persist through metamorphosis, contrary to the assumption that the adult nervous system is formed after settlement and the death of larval neurons during metamorphosis. Finally, we show that FGF signaling during the larval phase alters the patterning of the neck and its derivatives. Suppression of FGF converts neck cells into larval neurons that fail to survive metamorphosis, whereas prolonged FGF signaling promotes an adult neural stem cell-like fate.
Collapse
Affiliation(s)
- Eduardo D. Gigante
- School of Biological Sciences, College of Sciences, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Katarzyna M. Piekarz
- School of Biological Sciences, College of Sciences, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Alexandra Gurgis
- School of Biological Sciences, College of Sciences, Georgia Institute of Technology, Atlanta, GA 30332, USA
- Department of Biology, Case Western Reserve University, Cleveland, OH 44106, USA
| | - Leslie Cohen
- School of Biological Sciences, College of Sciences, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Florian Razy-Krajka
- School of Biological Sciences, College of Sciences, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Sydney Popsuj
- School of Biological Sciences, College of Sciences, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Christopher J. Johnson
- School of Biological Sciences, College of Sciences, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Hussan S. Ali
- School of Biological Sciences, College of Sciences, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Shruthi Mohana Sundaram
- School of Biological Sciences, College of Sciences, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Alberto Stolfi
- School of Biological Sciences, College of Sciences, Georgia Institute of Technology, Atlanta, GA 30332, USA
| |
Collapse
|
2
|
Iguchi R, Usui K, Nakayama S, Sasakura Y, Sekiguchi T, Ogasawara M. Multi-regional expression of pancreas-related digestive enzyme genes in the intestinal chamber of the ascidian Ciona intestinalis type A. Cell Tissue Res 2023; 394:423-430. [PMID: 37878073 DOI: 10.1007/s00441-023-03839-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Accepted: 10/17/2023] [Indexed: 10/26/2023]
Abstract
Bilateria share sequential steps in their digestive systems, and digestion occurs in a pre-absorption step within a chamber-like structure. Previous studies on the ascidian Ciona intestinalis type A, an evolutionary research model of vertebrate organs, revealed that Ciona homologs of pancreas-related exocrine digestive enzymes (XDEs) are exclusively expressed in the chamber-like bulging stomach. In the development of the gastrointestinal tract, genes for the pancreas-related transcription factors, namely Ptf1a, Nr5a2, and Pdx, are expressed near the stomach. Recent organ/tissue RNA-seq studies on two Ciona species reported that transcripts of the XDE homologs exist in the intestinal regions, as well as in the stomach. In the present study, we investigated the spatial gene expression of XDE homologs in the gastrointestinal region of the C. intestinalis type A. Whole-mount in situ hybridization using adult and juvenile specimens revealed apparent expression signals of XDE homologs in a small number of gastrointestinal epithelial cells. Furthermore, two pancreas-related transcription factor genes, Nr5a2 and Pdx, exhibited multi-regional expression along the Ciona juvenile intestines. These results imply that ascidians may form multiple digestive regions corresponding to the vertebrate pancreas.
Collapse
Affiliation(s)
- Rin Iguchi
- Department of Biology, Graduate School of Science, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba, 263-8522, Japan
| | - Kanae Usui
- Department of Biology, Graduate School of Science, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba, 263-8522, Japan
| | - Satoshi Nakayama
- Department of Biology, Graduate School of Science, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba, 263-8522, Japan
| | - Yasunori Sasakura
- Shimoda Marine Research Center, University of Tsukuba, 5-10-1 Shimoda, Shizuoka, 415-0025, Japan
| | - Toshio Sekiguchi
- The Noto Marine Laboratory, Division of Marine Environmental Studies, Institute of Nature and Environmental Technology, Kanazawa University, Kanazawa, Housu-gun, Ishikawa, 927-0553, Japan
| | - Michio Ogasawara
- Department of Biology, Graduate School of Science, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba, 263-8522, Japan.
| |
Collapse
|
3
|
Iguchi R, Nakayama S, Sasakura Y, Sekiguchi T, Ogasawara M. Repetitive and zonal expression profiles of absorption-related genes in the gastrointestinal tract of ascidian Ciona intestinalis type A. Cell Tissue Res 2023; 394:343-360. [PMID: 37670165 DOI: 10.1007/s00441-023-03828-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Accepted: 08/15/2023] [Indexed: 09/07/2023]
Abstract
Intestinal absorption is essential for heterotrophic bilaterians with a tubular gut. Although the fundamental features of the digestive system were shared among chordates with evolution, the gut morphologies of vertebrates diverged and adapted to different food habitats. The ascidian Ciona intestinalis type A, a genome-wide research model of basal chordates, is used to examine the functional morphology of the intestines because of its transparent juvenile body. In the present study, the characteristic gene expression patterns (GEP) of Ciona absorptive proteins, e.g., brush border membrane enzymes for terminal digestion (lactase, maltase, APA, and APN) and transporters (SGLT1, GLUT5, PEPT1, and B0AT1), were investigated in juveniles and young adults, with a special reference to the absorption of other nutrients by pinocytosis- and phagocytosis-related proteins (megalin, cubilin, amnionless, Dab2, Rab7, LAMP, cathepsins, and MRC1). Whole-mount in situ hybridization revealed that these GEP showed multi-regional and repetitive features along the Ciona gastrointestinal tract, mainly in the stomach and several regions of the intestines. In young adults, many absorption-related genes, including pinocytosis-/phagocytosis-related genes, were also expressed between the stomach and mid-intestine. In the gastrointestinal epithelium, absorption-related genes showed zonal GEP along the epithelial structure. Comparisons of GEP, including other intestinal functions, such as nutrient digestion and intestinal protection, indicated the repetitive assignment of a well-coordinated set of intestinal GEP in the Ciona gastrointestinal tract.
Collapse
Affiliation(s)
- Rin Iguchi
- Department of Biology, Graduate School of Science, Chiba University, 1-33 Yayoi-Cho, Inage-Ku, Chiba, 263-8522, Japan
| | - Satoshi Nakayama
- Department of Biology, Graduate School of Science, Chiba University, 1-33 Yayoi-Cho, Inage-Ku, Chiba, 263-8522, Japan
| | - Yasunori Sasakura
- Shimoda Marine Research Center, University of Tsukuba, 5-10-1 Shimoda, Shizuoka, 415-0025, Japan
| | - Toshio Sekiguchi
- The Noto Marine Laboratory, Division of Marine Environmental Studies, Institute of Nature and Environmental Technology, Kanazawa University, Housu-Gun, Ishikawa, 927-0553, Japan
| | - Michio Ogasawara
- Department of Biology, Graduate School of Science, Chiba University, 1-33 Yayoi-Cho, Inage-Ku, Chiba, 263-8522, Japan.
| |
Collapse
|
4
|
Schuster KJ, Christiaen L. The Chordate Origins of Heart Regeneration. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.09.19.558507. [PMID: 37781597 PMCID: PMC10541106 DOI: 10.1101/2023.09.19.558507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/03/2023]
Abstract
The human heart is infamous for not healing after infarction in adults, prompting biomedical interest in species that can regenerate damaged hearts. In such animals as zebrafish and neonatal mice, cardiac repair relies on remaining heart tissue supporting cardiomyocyte proliferation. Natural de novo cardiogenesis in post-embryonic stages thus remains elusive. Here we show that the tunicate Ciona, an ascidian among the closest living relatives to the vertebrates, can survive complete chemogenetic ablation of the heart and loss of cardiac function, and recover both cardiac tissue and contractility. As in vertebrates, Ciona heart regeneration relies on Bone Morphogenetic Protein (BMP) signaling-dependent proliferation of cardiomyocytes, providing insights into the evolutionary origins of regenerative cardiogenesis in chordates. Remarkably, prospective lineage tracing by photoconversion of the fluorescent protein Kaede suggested that new cardiomyocytes can emerge from endodermal lineages in post-metamorphic animals, providing an unprecedented case of regenerative de novo cardiogenesis. Finally, while embryos cannot compensate for early losses of the cardiogenic lineage, forming heartless juveniles, developing animals gain their regenerative ability during metamorphosis, uncovering a fundamental transition between deterministic embryogenesis and regulative post-embryonic development.
Collapse
Affiliation(s)
- Keaton J Schuster
- Center for Developmental Genetics, Department of Biology, New York University, New York, NY, USA
| | - Lionel Christiaen
- Center for Developmental Genetics, Department of Biology, New York University, New York, NY, USA
- Center for Genomics and Systems Biology, Department of Biology, New York University, New York, NY, USA
- Michael Sars Centre, University of Bergen, Bergen, Norway
| |
Collapse
|
5
|
Oonuma K, Yamamoto M, Moritsugu N, Okawa N, Mukai M, Sotani M, Tsunemi S, Sugimoto H, Nakagome E, Hasegawa Y, Shimai K, Horie T, Kusakabe TG. Evolution of Developmental Programs for the Midline Structures in Chordates: Insights From Gene Regulation in the Floor Plate and Hypochord Homologues of Ciona Embryos. Front Cell Dev Biol 2021; 9:704367. [PMID: 34235159 PMCID: PMC8256262 DOI: 10.3389/fcell.2021.704367] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2021] [Accepted: 05/25/2021] [Indexed: 11/24/2022] Open
Abstract
In vertebrate embryos, dorsal midline tissues, including the notochord, the prechordal plate, and the floor plate, play important roles in patterning of the central nervous system, somites, and endodermal tissues by producing extracellular signaling molecules, such as Sonic hedgehog (Shh). In Ciona, hedgehog.b, one of the two hedgehog genes, is expressed in the floor plate of the embryonic neural tube, while none of the hedgehog genes are expressed in the notochord. We have identified a cis-regulatory region of hedgehog.b that was sufficient to drive a reporter gene expression in the floor plate. The hedgehog.b cis-regulatory region also drove ectopic expression of the reporter gene in the endodermal strand, suggesting that the floor plate and the endodermal strand share a part of their gene regulatory programs. The endodermal strand occupies the same topographic position of the embryo as does the vertebrate hypochord, which consists of a row of single cells lined up immediately ventral to the notochord. The hypochord shares expression of several genes with the floor plate, including Shh and FoxA, and play a role in dorsal aorta development. Whole-embryo single-cell transcriptome analysis identified a number of genes specifically expressed in both the floor plate and the endodermal strand in Ciona tailbud embryos. A Ciona FoxA ortholog FoxA.a is shown to be a candidate transcriptional activator for the midline gene battery. The present findings suggest an ancient evolutionary origin of a common developmental program for the midline structures in Olfactores.
Collapse
Affiliation(s)
- Kouhei Oonuma
- Department of Biology, Faculty of Science and Engineering, Konan University, Kobe, Japan.,Institute for Integrative Neurobiology, Graduate School of Natural Science, Konan University, Kobe, Japan
| | - Maho Yamamoto
- Department of Biology, Faculty of Science and Engineering, Konan University, Kobe, Japan
| | - Naho Moritsugu
- Department of Biology, Faculty of Science and Engineering, Konan University, Kobe, Japan
| | - Nanako Okawa
- Department of Biology, Faculty of Science and Engineering, Konan University, Kobe, Japan.,Institute for Integrative Neurobiology, Graduate School of Natural Science, Konan University, Kobe, Japan
| | - Megumi Mukai
- Department of Biology, Faculty of Science and Engineering, Konan University, Kobe, Japan.,Institute for Integrative Neurobiology, Graduate School of Natural Science, Konan University, Kobe, Japan
| | - Miku Sotani
- Department of Biology, Faculty of Science and Engineering, Konan University, Kobe, Japan.,Institute for Integrative Neurobiology, Graduate School of Natural Science, Konan University, Kobe, Japan
| | - Shuto Tsunemi
- Department of Biology, Faculty of Science and Engineering, Konan University, Kobe, Japan.,Institute for Integrative Neurobiology, Graduate School of Natural Science, Konan University, Kobe, Japan
| | - Haruka Sugimoto
- Department of Biology, Faculty of Science and Engineering, Konan University, Kobe, Japan
| | - Eri Nakagome
- Department of Biology, Faculty of Science and Engineering, Konan University, Kobe, Japan
| | - Yuichi Hasegawa
- Department of Biology, Faculty of Science and Engineering, Konan University, Kobe, Japan.,Institute for Integrative Neurobiology, Graduate School of Natural Science, Konan University, Kobe, Japan
| | - Kotaro Shimai
- Department of Biology, Faculty of Science and Engineering, Konan University, Kobe, Japan.,Institute for Integrative Neurobiology, Graduate School of Natural Science, Konan University, Kobe, Japan
| | - Takeo Horie
- Shimoda Marine Research Center, University of Tsukuba, Shimoda, Japan
| | - Takehiro G Kusakabe
- Department of Biology, Faculty of Science and Engineering, Konan University, Kobe, Japan.,Institute for Integrative Neurobiology, Graduate School of Natural Science, Konan University, Kobe, Japan
| |
Collapse
|
6
|
Wakai MK, Nakamura MJ, Sawai S, Hotta K, Oka K. Two-Round Ca 2+ transient in papillae by mechanical stimulation induces metamorphosis in the ascidian Ciona intestinalis type A. Proc Biol Sci 2021; 288:20203207. [PMID: 33593191 DOI: 10.1098/rspb.2020.3207] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Marine invertebrate larvae are known to begin metamorphosis in response to environmentally derived cues. However, little is known about the relationships between the perception of such cues and internal signalling for metamorphosis. To elucidate the mechanism underlying the initiation of metamorphosis in the ascidian, Ciona intestinalis type A (Ciona robusta), we artificially induced ascidian metamorphosis and investigated Ca2+ dynamics from pre- to post-metamorphosis. Ca2+ transients were observed and consisted of two temporally distinct phases with different durations before tail regression which is the early event of metamorphosis. In the first phase, Phase I, the Ca2+ transient in the papillae (adhesive organ of the anterior trunk) was coupled with the Ca2+ transient in dorsally localized cells and endoderm cells just after mechanical stimulation. The Ca2+ transients in Phase I were also observed when applying only short stimulation. In the second phase, Phase II, the Ca2+ transient in papillae was observed again and lasted for approximately 5-11 min just after the Ca2+ transient in Phase I continued for a few minutes. The impaired papillae by Foxg-knockdown failed to induce the second Ca2+ transient in Phase II and tail regression. In Phase II, a wave-like Ca2+ propagation was also observed across the entire epidermis. Our results indicate that the papillae sense a mechanical cue and two-round Ca2+ transients in papillae transmits the internal metamorphic signals to different tissues, which subsequently induces tail regression. Our study will help elucidate the internal mechanism of metamorphosis in marine invertebrate larvae in response to environmental cues.
Collapse
Affiliation(s)
- Maiki K Wakai
- Department of Biosciences and Informatics, Faculty of Science and Technology, Keio University, Kouhoku-ku, Yokohama 223-8522, Japan
| | - Mitsuru J Nakamura
- Graduate School of Arts and Sciences, University of Tokyo, Komaba, 153-8902 Tokyo, Japan
| | - Satoshi Sawai
- Graduate School of Arts and Sciences, University of Tokyo, Komaba, 153-8902 Tokyo, Japan
| | - Kohji Hotta
- Department of Biosciences and Informatics, Faculty of Science and Technology, Keio University, Kouhoku-ku, Yokohama 223-8522, Japan
| | - Kotaro Oka
- Department of Biosciences and Informatics, Faculty of Science and Technology, Keio University, Kouhoku-ku, Yokohama 223-8522, Japan.,Waseda Research Institute for Science and Engineering, Waseda University, 2-2 Wakamatsucho, Shinjuku, Tokyo 162-8480, Japan.,Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung City 80708, Taiwan
| |
Collapse
|
7
|
Yamaji S, Hozumi A, Matsunobu S, Sasakura Y. Orchestration of the distinct morphogenetic movements in different tissues drives tail regression during ascidian metamorphosis. Dev Biol 2020; 465:66-78. [PMID: 32697971 DOI: 10.1016/j.ydbio.2020.07.009] [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] [Received: 04/24/2020] [Revised: 07/10/2020] [Accepted: 07/11/2020] [Indexed: 11/26/2022]
Abstract
Metamorphosis is the dramatic conversion of an animal body from larva to adult. In ascidians, tadpole-shaped, swimming larvae become sessile juveniles by losing their tail during metamorphosis. This study investigated the cellular and molecular mechanisms underlying this metamorphic event called tail regression, in the model ascidian Ciona. The ascidian tail consists of internal organs such as muscle, notochord, nerve cord, and the outer epidermal layer surrounding them. We found that the epidermis and internal organs show different regression strategies. Epidermal cells are shortened along the anterior-posterior axis and gather at the posterior region. The epidermal mass is then invaginated into the trunk by apical constriction. The internal tissues, by contrast, enter into the trunk by forming coils. During coiling, notches are introduced into the muscle cells, which likely reduces their rigidness to promote coiling. Actin filament is the major component necessary for the regression events in both the epidermis and internal tissues. The shortening and invagination of the epidermis depend on the phosphorylation of the myosin regulatory light chain (mrlc) regulated by rho-kinase (ROCK). The coiling of internal tissues does not require ROCK-dependent phosphorylation of mrlc, and they can complete coiling without epidermis, although epidermis can facilitate the coiling of internal tissues. We conclude that tail regression in ascidians consists of active morphogenetic movements in which each tissue's independent mechanism is orchestrated with the others to complete this event within the available time window.
Collapse
Affiliation(s)
- Sota Yamaji
- Shimoda Marine Research Center, University of Tsukuba, Shimoda, Shizuoka, 415-0025, Japan
| | - Akiko Hozumi
- Shimoda Marine Research Center, University of Tsukuba, Shimoda, Shizuoka, 415-0025, Japan
| | - Shohei Matsunobu
- Shimoda Marine Research Center, University of Tsukuba, Shimoda, Shizuoka, 415-0025, Japan
| | - Yasunori Sasakura
- Shimoda Marine Research Center, University of Tsukuba, Shimoda, Shizuoka, 415-0025, Japan.
| |
Collapse
|
8
|
Cao C, Lemaire LA, Wang W, Yoon PH, Choi YA, Parsons LR, Matese JC, Wang W, Levine M, Chen K. Comprehensive single-cell transcriptome lineages of a proto-vertebrate. Nature 2019; 571:349-354. [PMID: 31292549 PMCID: PMC6978789 DOI: 10.1038/s41586-019-1385-y] [Citation(s) in RCA: 135] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Accepted: 06/10/2019] [Indexed: 11/17/2022]
Abstract
Ascidian embryos highlight the importance of cell lineages in animal development. As simple proto-vertebrates they also provide insights into the evolutionary origins of novel cell types, such as cranial placodes and neural crest. To build upon these efforts we have determined single cell transcriptomes for more than 90,000 cells spanning the entirety of Ciona intestinalis development, from the onset of gastrulation to swimming tadpoles. This represents an average of over 12-fold coverage for every cell at every stage of development, owing to the small cell numbers of ascidian embryos. Single cell transcriptome trajectories were used to construct “virtual” cell lineage maps and provisional gene networks for nearly 40 different neuronal subtypes comprising the larval nervous system. We summarize several applications of these datasets, including annotating the synaptome of swimming tadpoles and tracing the evolutionary origin of novel cell types such as the vertebrate telencephalon.
Collapse
Affiliation(s)
- Chen Cao
- Lewis-Sigler Institute for Integrative Genomics, Princeton University, Princeton, NJ, USA
| | - Laurence A Lemaire
- Lewis-Sigler Institute for Integrative Genomics, Princeton University, Princeton, NJ, USA
| | - Wei Wang
- Stowers Institute for Medical Research, Kansas City, MO, USA
| | - Peter H Yoon
- Department of Molecular Biology, Princeton University, Princeton, NJ, USA
| | - Yoolim A Choi
- Department of Molecular Biology, Princeton University, Princeton, NJ, USA
| | - Lance R Parsons
- Lewis-Sigler Institute for Integrative Genomics, Princeton University, Princeton, NJ, USA
| | - John C Matese
- Lewis-Sigler Institute for Integrative Genomics, Princeton University, Princeton, NJ, USA
| | - Wei Wang
- Lewis-Sigler Institute for Integrative Genomics, Princeton University, Princeton, NJ, USA
| | - Michael Levine
- Lewis-Sigler Institute for Integrative Genomics, Princeton University, Princeton, NJ, USA. .,Department of Molecular Biology, Princeton University, Princeton, NJ, USA.
| | - Kai Chen
- Lewis-Sigler Institute for Integrative Genomics, Princeton University, Princeton, NJ, USA. .,The Yunnan Key Laboratory of Primate Biomedical Research, Institute of Primate Translational Medicine, Kunming University of Science and Technology, Kunming, China.
| |
Collapse
|
9
|
Razy-Krajka F, Stolfi A. Regulation and evolution of muscle development in tunicates. EvoDevo 2019; 10:13. [PMID: 31249657 PMCID: PMC6589888 DOI: 10.1186/s13227-019-0125-6] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Accepted: 06/08/2019] [Indexed: 12/16/2022] Open
Abstract
For more than a century, studies on tunicate muscle formation have revealed many principles of cell fate specification, gene regulation, morphogenesis, and evolution. Here, we review the key studies that have probed the development of all the various muscle cell types in a wide variety of tunicate species. We seize this occasion to explore the implications and questions raised by these findings in the broader context of muscle evolution in chordates.
Collapse
Affiliation(s)
- Florian Razy-Krajka
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, USA
| | - Alberto Stolfi
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, USA
| |
Collapse
|
10
|
Nakayama S, Sekiguchi T, Ogasawara M. Molecular and evolutionary aspects of the protochordate digestive system. Cell Tissue Res 2019; 377:309-320. [PMID: 31049686 DOI: 10.1007/s00441-019-03035-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Accepted: 04/12/2019] [Indexed: 02/03/2023]
Abstract
The digestive system is a functional unit consisting of an endodermal tubular structure (alimentary canal) and accessory organs that function in nutrition processing in most triploblastic animals. Various morphologies and apparatuses are formed depending on the phylogenetical relationship and food habits of the specific species. Nutrition processing and morphogenesis of the alimentary canal and accessory organs have both been investigated in vertebrates, mainly humans and mammals. When attempting to understand the evolutionary processes that led to the vertebrate digestive system, however, it is useful to examine other chordates, specifically protochordates, which share fundamental functional and morphogenetic molecules with vertebrates, which also possess non-duplicated genomes. In protochordates, basic anatomical and physiological studies have mainly described the characteristic traits of suspension feeders. Recent progress in genome sequencing has allowed researchers to comprehensively detail protochordate genes and has compared the genetic backgrounds among chordate nutrition processing and alimentary canal/accessory organ systems based on genomic information. Gene expression analyses have revealed spatiotemporal gene expression profiles in protochordate alimentary canals. Additionally, to investigate the basis of morphological diversity in the chordate alimentary canal and accessory organs, evolutionary developmental research has examined developmental transcription factors related to morphogenesis and anterior-posterior pattering of the alimentary canal and accessory organs. In this review, we summarize the current knowledge of molecules involved in nutrition processing and the development of the alimentary canal and accessory organs with innate immune and endocrine roles in protochordates and we explore the molecular basis for understanding the evolution of the chordate digestive system.
Collapse
Affiliation(s)
- Satoshi Nakayama
- The Graduate School of Science, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba, 263-8522, Japan
| | - Toshio Sekiguchi
- The Noto Marine Laboratory, Division of Marine Environmental Studies, Institute of Nature and Environmental Technology, Kanazawa University, Hosu-gun, Ishikawa, 927-0553, Japan
| | - Michio Ogasawara
- The Graduate School of Science, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba, 263-8522, Japan.
| |
Collapse
|
11
|
Sasakura Y. Cellulose production and the evolution of the sessile lifestyle in ascidians. ACTA ACUST UNITED AC 2018. [DOI: 10.4282/sosj.35.21] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
12
|
Shimai K, Kusakabe TG. The Use of cis-Regulatory DNAs as Molecular Tools. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018. [DOI: 10.1007/978-981-10-7545-2_6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
|
13
|
Sasakura Y, Hozumi A. Formation of adult organs through metamorphosis in ascidians. WILEY INTERDISCIPLINARY REVIEWS-DEVELOPMENTAL BIOLOGY 2017; 7. [PMID: 29105358 DOI: 10.1002/wdev.304] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2017] [Revised: 08/28/2017] [Accepted: 09/11/2017] [Indexed: 02/05/2023]
Abstract
The representative characteristic of ascidians is their vertebrate-like, tadpole shape at the larval stage. Ascidians lose the tadpole shape through metamorphosis to become adults with a nonmotile, sessile body and a shape generally considered distinct from that of vertebrates. Solitary ascidians including Ciona species are extensively studied to understand the developmental mechanisms of ascidians, and to compare these mechanisms with their counterparts in vertebrates. In these ascidian species, the digestive and circulatory systems are not well developed in the larval trunk and the larvae do not take food. This is in contrast with the inner conditions of vertebrate tadpoles, which have functional organs comparable to those of adults. The adult organs and tissues of these ascidians become functional during metamorphosis that is completed quickly, suggesting that the ascidian larvae of solitary species are a transient stage of development. We here discuss how the cells and tissues in the ascidian larval body are converted into those of adults. The hearts of ascidians and vertebrates use closely related cellular and molecular mechanisms that suggest their shared origin. Hox genes of ascidians are essential for forming adult endodermal structures. To fully understand the development and evolution of chordates, a complete elucidation of the mechanisms underlying the adult tissue/organ formation of ascidians will be needed. WIREs Dev Biol 2018, 7:e304. doi: 10.1002/wdev.304 This article is categorized under: Comparative Development and Evolution > Body Plan Evolution Early Embryonic Development > Development to the Basic Body Plan.
Collapse
Affiliation(s)
- Yasunori Sasakura
- Shimoda Marine Research Center, University of Tsukuba, Shimoda, Shizuoka, Japan
| | - Akiko Hozumi
- Shimoda Marine Research Center, University of Tsukuba, Shimoda, Shizuoka, Japan
| |
Collapse
|
14
|
Palmquist K, Davidson B. Establishment of lateral organ asymmetries in the invertebrate chordate, Ciona intestinalis. EvoDevo 2017; 8:12. [PMID: 28770040 PMCID: PMC5526266 DOI: 10.1186/s13227-017-0075-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Accepted: 07/17/2017] [Indexed: 11/17/2022] Open
Abstract
BACKGROUND The evolutionary emergence and diversification of the chordates appear to involve dramatic changes in organ morphogenesis along the left/right axis. However, the ancestral chordate mechanism for establishing lateral asymmetry remains ambiguous. Additionally, links between the initial establishment of lateral asymmetry and subsequent asymmetries in organ morphogenesis are poorly characterized. RESULTS To explore asymmetric organ morphogenesis during chordate evolution, we have begun to characterize left/right patterning of the heart and endodermal organs in an invertebrate chordate, Ciona intestinalis. Here, we show that Ciona has a laterally asymmetric, right-sided heart. Our data indicate that cardiac lateral asymmetry requires H+/K+ ion flux, but is independent of Nodal signaling. Our pharmacological inhibitor studies show that ion flux is required for polarization of epidermal cilia and neurula rotation and suggest that ion flux functions synergistically with chorion contact to drive cardiac laterality. Live imaging analysis revealed that larval heart progenitor cells undergo a lateral shift without displaying any migratory behaviors. Furthermore, we find that this passive shift corresponds with the emergence of lateral asymmetry in the endoderm, which is also ion flux dependent. CONCLUSIONS Our data suggest that ion flux promotes laterally asymmetric morphogenesis of the larval endoderm rudiment leading to a passive, Nodal-independent shift in the position of associated heart progenitor cells. These findings help to refine hypotheses regarding ancestral chordate left/right patterning mechanisms and how they have diverged within invertebrate and vertebrate chordate lineages.
Collapse
Affiliation(s)
- Karl Palmquist
- Department of Biology, Swarthmore College, 500 College Ave., Swarthmore, PA 19081 USA
| | - Brad Davidson
- Department of Biology, Swarthmore College, 500 College Ave., Swarthmore, PA 19081 USA
| |
Collapse
|
15
|
Germ cell regeneration-mediated, enhanced mutagenesis in the ascidian Ciona intestinalis reveals flexible germ cell formation from different somatic cells. Dev Biol 2017; 423:111-125. [DOI: 10.1016/j.ydbio.2017.01.022] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Revised: 01/12/2017] [Accepted: 01/31/2017] [Indexed: 11/22/2022]
|
16
|
Ordered expression pattern of Hox and ParaHox genes along the alimentary canal in the ascidian juvenile. Cell Tissue Res 2016; 365:65-75. [DOI: 10.1007/s00441-016-2360-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2015] [Accepted: 01/07/2016] [Indexed: 01/03/2023]
|
17
|
Kawai N, Ogura Y, Ikuta T, Saiga H, Hamada M, Sakuma T, Yamamoto T, Satoh N, Sasakura Y. Hox10-regulated endodermal cell migration is essential for development of the ascidian intestine. Dev Biol 2015; 403:43-56. [PMID: 25888074 DOI: 10.1016/j.ydbio.2015.03.018] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2015] [Accepted: 03/25/2015] [Indexed: 11/17/2022]
Abstract
Hox cluster genes play crucial roles in development of the metazoan antero-posterior axis. Functions of Hox genes in patterning the central nervous system and limb buds are well known. They are also expressed in chordate endodermal tissues, where their roles in endodermal development are still poorly understood. In the invertebrate chordate, Ciona intestinalis, endodermal tissues are in a premature state during the larval stage, and they differentiate into the digestive tract during metamorphosis. In this study, we showed that disruption of a Hox gene, Ci-Hox10, prevented intestinal formation. Ci-Hox10-knock-down larvae displayed defective migration of endodermal strand cells. Formation of a protrusion, which is important for cell migration, was disrupted in these cells. The collagen type IX gene is a downstream target of Ci-Hox10, and is negatively regulated by Ci-Hox10 and a matrix metalloproteinase ortholog, prior to endodermal cell migration. Inhibition of this regulation prevented cellular migration. These results suggest that Ci-Hox10 regulates endodermal strand cell migration by forming a protrusion and by reconstructing the extracellular matrix.
Collapse
Affiliation(s)
- Narudo Kawai
- Shimoda Marine Research Center, University of Tsukuba, Shimoda, Shizuoka 415-0025, Japan.
| | - Yosuke Ogura
- Shimoda Marine Research Center, University of Tsukuba, Shimoda, Shizuoka 415-0025, Japan
| | - Tetsuro Ikuta
- Department of Biological Sciences, Graduate School of Science and Engineering, Tokyo Metropolitan University, 1-1 Minamioosawa, Hachiohji, Tokyo 192-0397, Japan; Marine Genomics Unit, Okinawa Institute of Science and Technology Graduate University, Onna, Okinawa 904-0495, Japan
| | - Hidetoshi Saiga
- Department of Biological Sciences, Graduate School of Science and Engineering, Tokyo Metropolitan University, 1-1 Minamioosawa, Hachiohji, Tokyo 192-0397, Japan
| | - Mayuko Hamada
- Marine Genomics Unit, Okinawa Institute of Science and Technology Graduate University, Onna, Okinawa 904-0495, Japan
| | - Tetsushi Sakuma
- Department of Mathematical and Life Sciences, Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8526, Japan
| | - Takashi Yamamoto
- Department of Mathematical and Life Sciences, Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8526, Japan
| | - Nori Satoh
- Marine Genomics Unit, Okinawa Institute of Science and Technology Graduate University, Onna, Okinawa 904-0495, Japan
| | - Yasunori Sasakura
- Shimoda Marine Research Center, University of Tsukuba, Shimoda, Shizuoka 415-0025, Japan
| |
Collapse
|
18
|
Thompson JM, Di Gregorio A. Insulin-like genes in ascidians: findings in Ciona and hypotheses on the evolutionary origins of the pancreas. Genesis 2014; 53:82-104. [PMID: 25378051 DOI: 10.1002/dvg.22832] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2014] [Revised: 10/13/2014] [Accepted: 10/16/2014] [Indexed: 12/22/2022]
Abstract
Insulin plays an extensively characterized role in the control of sugar metabolism, growth and homeostasis in a wide range of organisms. In vertebrate chordates, insulin is mainly produced by the beta cells of the endocrine pancreas, while in non-chordate animals insulin-producing cells are mainly found in the nervous system and/or scattered along the digestive tract. However, recent studies have indicated the notochord, the defining feature of the chordate phylum, as an additional site of expression of insulin-like peptides. Here we show that two of the three insulin-like genes identified in Ciona intestinalis, an invertebrate chordate with a dual life cycle, are first expressed in the developing notochord during embryogenesis and transition to distinct areas of the adult digestive tract after metamorphosis. In addition, we present data suggesting that the transcription factor Ciona Brachyury is involved in the control of notochord expression of at least one of these genes, Ciona insulin-like 2. Finally, we review the information currently available on insulin-producing cells in ascidians and on pancreas-related transcription factors that might control their expression.
Collapse
Affiliation(s)
- Jordan M Thompson
- Department of Cell and Developmental Biology, Weill Medical College of Cornell University, 1300 York Avenue, New York, New York
| | | |
Collapse
|
19
|
Kishi K, Onuma TA, Nishida H. Long-distance cell migration during larval development in the appendicularian, Oikopleura dioica. Dev Biol 2014; 395:299-306. [DOI: 10.1016/j.ydbio.2014.09.006] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2014] [Revised: 08/30/2014] [Accepted: 09/07/2014] [Indexed: 02/04/2023]
|
20
|
Dishaw LJ, Cannon JP, Litman GW, Parker W. Immune-directed support of rich microbial communities in the gut has ancient roots. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2014; 47:36-51. [PMID: 24984114 PMCID: PMC4146740 DOI: 10.1016/j.dci.2014.06.011] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2014] [Revised: 05/30/2014] [Accepted: 06/21/2014] [Indexed: 05/12/2023]
Abstract
The animal gut serves as a primary location for the complex host-microbe interplay that is essential for homeostasis and may also reflect the types of ancient selective pressures that spawned the emergence of immunity in metazoans. In this review, we present a phylogenetic survey of gut host-microbe interactions and suggest that host defense systems arose not only to protect tissue directly from pathogenic attack but also to actively support growth of specific communities of mutualists. This functional dichotomy resulted in the evolution of immune systems much more tuned for harmonious existence with microbes than previously thought, existing as dynamic but primarily cooperative entities in the present day. We further present the protochordate Ciona intestinalis as a promising model for studying gut host-bacterial dialogue. The taxonomic position, gut physiology and experimental tractability of Ciona offer unique advantages in dissecting host-microbe interplay and can complement studies in other model systems.
Collapse
Affiliation(s)
- Larry J Dishaw
- Department of Pediatrics, University of South Florida Morsani College of Medicine, USF/ACH Children's Research Institute, 140 7th Avenue South, St. Petersburg, FL 33701, USA.
| | - John P Cannon
- Department of Pediatrics, University of South Florida Morsani College of Medicine, USF/ACH Children's Research Institute, 140 7th Avenue South, St. Petersburg, FL 33701, USA
| | - Gary W Litman
- Department of Pediatrics, University of South Florida Morsani College of Medicine, USF/ACH Children's Research Institute, 140 7th Avenue South, St. Petersburg, FL 33701, USA; Department of Molecular Genetics, All Children's Hospital-Johns Hopkins Medicine, 501 6th Avenue South, St. Petersburg, FL 33701, USA
| | - William Parker
- Department of Surgery, Duke University Medical Center, Box 2605, Durham, NC 27710, USA
| |
Collapse
|
21
|
Karaiskou A, Swalla BJ, Sasakura Y, Chambon JP. Metamorphosis in solitary ascidians. Genesis 2014; 53:34-47. [PMID: 25250532 DOI: 10.1002/dvg.22824] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2014] [Revised: 09/15/2014] [Accepted: 09/19/2014] [Indexed: 12/19/2022]
Abstract
Embryonic and postembryonic development in ascidians have been studied for over a century, but it is only in the last 10 years that the complex molecular network involved in coordinating postlarval development and metamorphosis has started to emerge. In most ascidians, the transition from the larval to the sessile juvenile/adult stage, or metamorphosis, requires a combination of environmental and endogenous signals and is characterized by coordinated global morphogenetic changes that are initiated by the adhesion of the larvae. Cloney was the first to describe cellular events of ascidians' metamorphosis in 1978 and only recently elements of the molecular regulation of this crucial developmental step have been revealed. This review aims to present a thorough view of this crucial developmental step by combining recent molecular data to the already established cellular events.
Collapse
Affiliation(s)
- Anthi Karaiskou
- Sorbonne Universités, UPMC Univ Paris 06, UMR7622-Biologie du Développement, Paris, France
| | | | | | | |
Collapse
|
22
|
Stolfi A, Sasakura Y, Chalopin D, Satou Y, Christiaen L, Dantec C, Endo T, Naville M, Nishida H, Swalla BJ, Volff JN, Voskoboynik A, Dauga D, Lemaire P. Guidelines for the nomenclature of genetic elements in tunicate genomes. Genesis 2014; 53:1-14. [PMID: 25220678 DOI: 10.1002/dvg.22822] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2014] [Revised: 09/08/2014] [Accepted: 09/11/2014] [Indexed: 01/23/2023]
Abstract
Tunicates are invertebrate members of the chordate phylum, and are considered to be the sister group of vertebrates. Tunicates are composed of ascidians, thaliaceans, and appendicularians. With the advent of inexpensive high-throughput sequencing, the number of sequenced tunicate genomes is expected to rise sharply within the coming years. To facilitate comparative genomics within the tunicates, and between tunicates and vertebrates, standardized rules for the nomenclature of tunicate genetic elements need to be established. Here we propose a set of nomenclature rules, consensual within the community, for predicted genes, pseudogenes, transcripts, operons, transcriptional cis-regulatory regions, transposable elements, and transgenic constructs. In addition, the document proposes guidelines for naming transgenic and mutant lines.
Collapse
Affiliation(s)
- Alberto Stolfi
- New York University, Center for Developmental Genetics, Department of Biology, 1009 Silver Center, 100 Washington Square East, New York City, New York
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
23
|
Liberti A, Melillo D, Zucchetti I, Natale L, Dishaw LJ, Litman GW, De Santis R, Pinto MR. Expression of Ciona intestinalis variable region-containing chitin-binding proteins during development of the gastrointestinal tract and their role in host-microbe interactions. PLoS One 2014; 9:e94984. [PMID: 24788831 PMCID: PMC4008424 DOI: 10.1371/journal.pone.0094984] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2014] [Accepted: 03/21/2014] [Indexed: 02/04/2023] Open
Abstract
Variable region-containing chitin-binding proteins (VCBPs) are secreted, immune-type molecules that have been described in both amphioxus, a cephalochordate, and sea squirt, Ciona intestinalis, a urochordate. In adult Ciona, VCBP-A, -B and -C are expressed in hemocytes and the cells of the gastrointestinal tract. VCBP-C binds bacteria in the stomach lumen and functions as an opsonin in vitro. In the present paper the expression of VCBPs has been characterized during development using in situ hybridization, immunohistochemical staining and quantitative polymerase chain reaction (qPCR) technologies. The expression of VCBP-A and -C is detected first in discrete areas of larva endoderm and becomes progressively localized during differentiation in the stomach and intestine, marking the development of gut tracts. In “small adults” (1–2 cm juveniles) expression of VCBP-C persists and VCBP-A gradually diminishes, ultimately replaced by expression of VCBP-B. The expression of VCBP-A and -C in stage 7–8 juveniles, at which point animals have already started feeding, is influenced significantly by challenge with either Gram-positive or -negative bacteria. A potential role for VCBPs in gut-microbiota interactions and homeostasis is indicated.
Collapse
Affiliation(s)
- Assunta Liberti
- Department of Animal Physiology and Evolution, Stazione Zoologica Anton Dohrn, Villa Comunale, Napoli, Italy
| | - Daniela Melillo
- Department of Animal Physiology and Evolution, Stazione Zoologica Anton Dohrn, Villa Comunale, Napoli, Italy
| | - Ivana Zucchetti
- Department of Animal Physiology and Evolution, Stazione Zoologica Anton Dohrn, Villa Comunale, Napoli, Italy
| | - Lenina Natale
- Department of Animal Physiology and Evolution, Stazione Zoologica Anton Dohrn, Villa Comunale, Napoli, Italy
| | - Larry J. Dishaw
- Department of Pediatrics, University of South Florida College of Medicine, St Petersburg, Florida, United States of America
| | - Gary W. Litman
- Department of Pediatrics, University of South Florida College of Medicine, St Petersburg, Florida, United States of America
| | - Rosaria De Santis
- Department of Animal Physiology and Evolution, Stazione Zoologica Anton Dohrn, Villa Comunale, Napoli, Italy
| | - Maria Rosaria Pinto
- Department of Animal Physiology and Evolution, Stazione Zoologica Anton Dohrn, Villa Comunale, Napoli, Italy
- * E-mail:
| |
Collapse
|