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Souza BR, Codo BC, Romano-Silva MA, Tropepe V. Darpp-32 is regulated by dopamine and is required for the formation of GABAergic neurons in the developing telencephalon. Prog Neuropsychopharmacol Biol Psychiatry 2024; 134:111060. [PMID: 38906412 DOI: 10.1016/j.pnpbp.2024.111060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/14/2024] [Revised: 04/22/2024] [Accepted: 06/17/2024] [Indexed: 06/23/2024]
Abstract
DARPP-32 (dopamine and cAMP-regulated phosphoprotein Mr. 32 kDa) is a phosphoprotein that is modulated by multiple receptors integrating intracellular pathways and playing roles in various physiological functions. It is regulated by dopaminergic receptors through the cAMP/protein kinase A (PKA) pathway, which modulates the phosphorylation of threonine 34 (Thr34). When phosphorylated at Thr34, DARPP-32 becomes a potent protein phosphatase-1 (PP1) inhibitor. Since dopamine is involved in the development of GABAergic neurons and DARPP-32 is expressed in the developing brain, it is possible that DARPP-32 has a role in GABAergic neuronal development. We cloned the zebrafish darpp-32 gene (ppp1r1b) gene and observed that it is evolutionarily conserved in its inhibitory domain (Thr34 and surrounding residues) and the docking motif (residues 7-11 (KKIQF)). We also characterized darpp-32 protein expression throughout the 5 days post-fertilization (dpf) zebrafish larval brain by immunofluorescence and demonstrated that darpp-32 is mainly expressed in regions that receive dopaminergic projections (pallium, subpallium, preoptic region, and hypothalamus). We demonstrated that dopamine acutely suppressed darpp-32 activity by reducing the levels of p-darpp-32 in the 5dpf zebrafish larval brain. In addition, the knockdown of darpp-32 resulted in a decrease in the number of GABAergic neurons in the subpallium of the 5dpf larval brain, with a concomitant increase in the number of DAergic neurons. Finally, we demonstrated that darpp-32 downregulation during development reduced the motor behavior of 5dpf zebrafish larvae. Thus, our observations suggest that darpp-32 is an evolutionarily conserved regulator of dopamine receptor signaling and is required for the formation of GABAergic neurons in the developing telencephalon.
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Affiliation(s)
- Bruno Rezende Souza
- Laboratório NeuroDEv, Department of Physiology and Biophysics, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil 31270-901; Laboratório de Neurociências Molecular e Comportamental (LANEC) - Universidade Federal de Minas Gerais, Belo Horizonte, MG 31270-901, Brazil.
| | - Beatriz Campos Codo
- Laboratório NeuroDEv, Department of Physiology and Biophysics, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil 31270-901; Laboratório de Neurociências Molecular e Comportamental (LANEC) - Universidade Federal de Minas Gerais, Belo Horizonte, MG 31270-901, Brazil
| | - Marco Aurélio Romano-Silva
- Laboratório de Neurociências and INCT de Medicina Molecular, Department of Mental Health, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil 30130-100
| | - Vincent Tropepe
- Department of Cell & Systems Biology, University of Toronto, Toronto, ON, Canada M5S 3G5.
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2
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Piñera-Moreno R, Reyes-López FE, Goldstein M, Santillán-Araneda MJ, Robles-Planells B, Arancibia-Carvallo C, Vallejos-Vidal E, Cuesta A, Esteban MÁ, Tort L. Transcriptional Evaluation of Neuropeptides, Hormones, and Tissue Repair Modulators in the Skin of Gilthead Sea Bream ( Sparus aurata L.) Subjected to Mechanical Damage. Animals (Basel) 2024; 14:1815. [PMID: 38929434 PMCID: PMC11200434 DOI: 10.3390/ani14121815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2024] [Revised: 06/05/2024] [Accepted: 06/14/2024] [Indexed: 06/28/2024] Open
Abstract
The skin of bony fish is the first physical barrier and is responsible for maintaining the integrity of the fish. Lesions make the skin vulnerable to potential infection by pathogens present in the aquatic environment. In this way, wound repair has barely been studied in gilthead sea bream. Thus, this study investigated the modulation of peripheral neuro-endocrine and tissue repair markers at the transcriptional level in the skin of teleost fish subjected to mechanical damage above or below the lateral line (dorsal and ventral lesions, respectively). Samples were evaluated using RT-qPCR at 2-, 4-, and 20-days post-injury. Fish with a ventral lesion presented a trend of progressive increase in the expressions of corticotropin-releasing hormone (crh), pro-opiomelanocortin-A (pomca), proenkephalin-B (penkb), cholecystokinin (cck), oxytocin (oxt), angiotensinogen (agt), and (less pronounced) somatostatin-1B (sst1b). By contrast, fish with a dorsal lesion registered no significant increase or biological trend for the genes evaluated at the different sampling times. Collectively, the results show a rapid and more robust response of neuro-endocrine and tissue repair markers in the injuries below than above the lateral line, which could be attributable to their proximity to vital organs.
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Affiliation(s)
- Rocío Piñera-Moreno
- Department of Cell Biology, Physiology and Immunology, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain;
| | - Felipe E. Reyes-López
- Fish Health and Integrative Physiogenomics Research Team, Centro de Biotecnología Acuícola, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago 9170002, Chile; (F.E.R.-L.); (B.R.-P.); (C.A.-C.); (E.V.-V.)
| | - Merari Goldstein
- Fish Health and Integrative Physiogenomics Research Team, Centro de Biotecnología Acuícola, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago 9170002, Chile; (F.E.R.-L.); (B.R.-P.); (C.A.-C.); (E.V.-V.)
| | - María Jesús Santillán-Araneda
- Fish Health and Integrative Physiogenomics Research Team, Centro de Biotecnología Acuícola, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago 9170002, Chile; (F.E.R.-L.); (B.R.-P.); (C.A.-C.); (E.V.-V.)
| | - Bárbara Robles-Planells
- Fish Health and Integrative Physiogenomics Research Team, Centro de Biotecnología Acuícola, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago 9170002, Chile; (F.E.R.-L.); (B.R.-P.); (C.A.-C.); (E.V.-V.)
| | - Camila Arancibia-Carvallo
- Fish Health and Integrative Physiogenomics Research Team, Centro de Biotecnología Acuícola, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago 9170002, Chile; (F.E.R.-L.); (B.R.-P.); (C.A.-C.); (E.V.-V.)
| | - Eva Vallejos-Vidal
- Fish Health and Integrative Physiogenomics Research Team, Centro de Biotecnología Acuícola, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago 9170002, Chile; (F.E.R.-L.); (B.R.-P.); (C.A.-C.); (E.V.-V.)
- Centro de Nanociencia y Nanotecnología CEDENNA, Universidad de Santiago de Chile, Santiago 9170002, Chile
- Núcleo de Investigación Aplicada en Ciencias Veterinarias y Agronómicas, Facultad de Medicina Veterinaria y Agronomía, Universidad de Las Américas, La Florida 8250122, Chile
| | - Alberto Cuesta
- Department of Cell Biology and Histology, Faculty of Biology, Campus Regional de Excelencia Internacional “Campus Mare Nostrum”, University of Murcia, 30100 Murcia, Spain;
| | - María Ángeles Esteban
- Department of Cell Biology and Histology, Faculty of Biology, Campus Regional de Excelencia Internacional “Campus Mare Nostrum”, University of Murcia, 30100 Murcia, Spain;
| | - Lluis Tort
- Department of Cell Biology, Physiology and Immunology, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain;
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3
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Nagpal J, Eachus H, Lityagina O, Ryu S. Optogenetic induction of chronic glucocorticoid exposure in early-life leads to blunted stress-response in larval zebrafish. Eur J Neurosci 2024; 59:3134-3146. [PMID: 38602078 DOI: 10.1111/ejn.16301] [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: 04/01/2023] [Revised: 11/29/2023] [Accepted: 02/19/2024] [Indexed: 04/12/2024]
Abstract
Early life stress (ELS) exposure alters stress susceptibility in later life and affects vulnerability to stress-related disorders, but how ELS changes the long-lasting responsiveness of the stress system is not well understood. Zebrafish provides an opportunity to study conserved mechanisms underlying the development and function of the stress response that is regulated largely by the neuroendocrine hypothalamus-pituitary-adrenal/interrenal (HPA/I) axis, with glucocorticoids (GC) as the final effector. In this study, we established a method to chronically elevate endogenous GC levels during early life in larval zebrafish. To this end, we employed an optogenetic actuator, beggiatoa photoactivated adenylyl cyclase, specifically expressed in the interrenal cells of zebrafish and demonstrate that its chronic activation leads to hypercortisolaemia and dampens the acute-stress evoked cortisol levels, across a variety of stressor modalities during early life. This blunting of stress-response was conserved in ontogeny at a later developmental stage. Furthermore, we observe a strong reduction of proopiomelanocortin (pomc)-expression in the pituitary as well as upregulation of fkbp5 gene expression. Going forward, we propose that this model can be leveraged to tease apart the mechanisms underlying developmental programming of the HPA/I axis by early-life GC exposure and its implications for vulnerability and resilience to stress in adulthood.
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Affiliation(s)
- Jatin Nagpal
- University Medical Center, Johannes Gutenberg University Mainz, Mainz, Germany
- APC Microbiome Ireland and School of Pharmacy and Department of Pharmacology and Therapeutics, University College Cork, Cork, Ireland
| | - Helen Eachus
- Living Systems Institute & Department of Clinical and Biomedical Sciences, University of Exeter, Exeter, UK
| | - Olga Lityagina
- University Medical Center, Johannes Gutenberg University Mainz, Mainz, Germany
- Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Soojin Ryu
- University Medical Center, Johannes Gutenberg University Mainz, Mainz, Germany
- Living Systems Institute & Department of Clinical and Biomedical Sciences, University of Exeter, Exeter, UK
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Raggio M, Giaquinto D, Attanasio C, Palladino A, Esposito V, Radaelli G, De Felice E, de Girolamo P, D'Angelo L. Fasting duration impacts ribosome protein 6 phosphorylation in zebrafish brain: New insights in aquatic organisms' welfare. Ann Anat 2024; 254:152266. [PMID: 38642855 DOI: 10.1016/j.aanat.2024.152266] [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: 12/29/2023] [Revised: 04/03/2024] [Accepted: 04/11/2024] [Indexed: 04/22/2024]
Abstract
BACKGROUND Short- or mid-term fasting, full or partial, triggers metabolic response known to have in turn health effects in an organism. At central level, the metabolic stimulus triggered by fasting is known to be perceived firstly by hypothalamic neurons. In the field of neuroscience, ribosomal protein S6 (S6) phosphorylation is commonly used as a readout of the mammalian target of rapamycin complex 1 signalling activation or as a marker for neuronal activity. The aim of this study is addressed to evaluate whether the phosphorylation of S6 occurs in the central neurons of zebrafish exposed to four (short-term) and seven (mid-term) days of complete fasting. METHODS Group-housed adult zebrafish were exposed to four and seven days of complete food withdrawal. At the end of the experimental period, Western blotting analyses were carried out to measure the expression levels of the phosphorylated S6 (pS6) by comparing the two experimental conditions versus the control group. The same antibody was then used to identify the distribution pattern of pS6 immunoreactive neurons in the whole brain and in the taste buds. RESULTS We did not observe increased pS6 levels expression in the brain of animals exposed to short-term fasting compared to the control, whereas the expression increased in brain homogenates of animals exposed to mid-term fasting. pS6 immunoreactivity was reported in some hypothalamic neurons, as well as in the dorsal area of telencephalon and preoptic area, a neurosecretory region homolog to the mammalian paraventricular nucleus. Remarkably, we observed pS6 immunostaining in the sensory cells of taste buds lining the oral epithelium. CONCLUSIONS Taken together, our data show that in zebrafish, differently from other fish species, seven days of fasting triggers neuronal activity. Furthermore, the immunostaining on sensory cells of taste buds suggests that metabolic changes may modulate also peripheral sensory cells. This event may have valuable implications when using zebrafish to design metabolic studies involving fasting as well as practical consequences on the animal welfare, in particularly stressful conditions, such as transportation.
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Affiliation(s)
- Maria Raggio
- Department of Veterinary Medicine and Animal Production, University of Naples Federico II, Via F. Delpino, Naples 1 I-80137, Italy
| | - Daniela Giaquinto
- Department of Veterinary Medicine and Animal Production, University of Naples Federico II, Via F. Delpino, Naples 1 I-80137, Italy
| | - Chiara Attanasio
- Department of Veterinary Medicine and Animal Production, University of Naples Federico II, Via F. Delpino, Naples 1 I-80137, Italy
| | - Antonio Palladino
- Department of Agricultural Science, University of Naples Federico II, Viale dell'Università, Portici, Napoli I-80055, Italy
| | - Vincenzo Esposito
- Department of Veterinary Medicine and Animal Production, University of Naples Federico II, Via F. Delpino, Naples 1 I-80137, Italy
| | - Giuseppe Radaelli
- Department of Comparative Biomedicine and Food Science (BCA), University of Padova, Viale dell'Università 16, Legnaro, Padova I-35020, Italy
| | - Elena De Felice
- School of Biosciences and Veterinary Medicine, University of Camerino, Camerino I-62032, Italy
| | - Paolo de Girolamo
- Department of Veterinary Medicine and Animal Production, University of Naples Federico II, Via F. Delpino, Naples 1 I-80137, Italy
| | - Livia D'Angelo
- Department of Veterinary Medicine and Animal Production, University of Naples Federico II, Via F. Delpino, Naples 1 I-80137, Italy.
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5
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Hiraki-Kajiyama T, Miyasaka N, Ando R, Wakisaka N, Itoga H, Onami S, Yoshihara Y. An atlas and database of neuropeptide gene expression in the adult zebrafish forebrain. J Comp Neurol 2024; 532:e25619. [PMID: 38831653 DOI: 10.1002/cne.25619] [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: 03/29/2023] [Revised: 03/21/2024] [Accepted: 04/16/2024] [Indexed: 06/05/2024]
Abstract
Zebrafish is a useful model organism in neuroscience; however, its gene expression atlas in the adult brain is not well developed. In the present study, we examined the expression of 38 neuropeptides, comparing with GABAergic and glutamatergic neuron marker genes in the adult zebrafish brain by comprehensive in situ hybridization. The results are summarized as an expression atlas in 19 coronal planes of the forebrain. Furthermore, the scanned data of all brain sections were made publicly available in the Adult Zebrafish Brain Gene Expression Database (https://ssbd.riken.jp/azebex/). Based on these data, we performed detailed comparative neuroanatomical analyses of the hypothalamus and found that several regions previously described as one nucleus in the reference zebrafish brain atlas contain two or more subregions with significantly different neuropeptide/neurotransmitter expression profiles. Subsequently, we compared the expression data in zebrafish telencephalon and hypothalamus obtained in this study with those in mice, by performing a cluster analysis. As a result, several nuclei in zebrafish and mice were clustered in close vicinity. The present expression atlas, database, and anatomical findings will contribute to future neuroscience research using zebrafish.
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Affiliation(s)
- Towako Hiraki-Kajiyama
- Laboratory for Systems Molecular Ethology, RIKEN Center for Brain Science, Wako, Saitama, Japan
- Laboratory of Molecular Ethology, Graduate School of Life Science, Tohoku University, Sendai, Miyagi, Japan
| | - Nobuhiko Miyasaka
- Laboratory for Systems Molecular Ethology, RIKEN Center for Brain Science, Wako, Saitama, Japan
| | - Reiko Ando
- Support Unit for Bio-Material Analysis, Research Resources Division, RIKEN Center for Brain Science, Wako, Saitama, Japan
| | - Noriko Wakisaka
- Laboratory for Systems Molecular Ethology, RIKEN Center for Brain Science, Wako, Saitama, Japan
| | - Hiroya Itoga
- Laboratory for Developmental Dynamics, RIKEN Center for Biosystems Dynamics Research, Kobe, Hyogo, Japan
| | - Shuichi Onami
- Laboratory for Developmental Dynamics, RIKEN Center for Biosystems Dynamics Research, Kobe, Hyogo, Japan
- Life Science Data Sharing Unit, RIKEN Information R&D and Strategy Headquarters, Kobe, Hyogo, Japan
| | - Yoshihiro Yoshihara
- Laboratory for Systems Molecular Ethology, RIKEN Center for Brain Science, Wako, Saitama, Japan
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6
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Folgueira M, Clarke JDW. Telencephalic eversion in embryos and early larvae of four teleost species. Evol Dev 2024; 26:e12474. [PMID: 38425004 DOI: 10.1111/ede.12474] [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: 11/28/2023] [Revised: 02/13/2024] [Accepted: 02/15/2024] [Indexed: 03/02/2024]
Abstract
The telencephalon of ray-finned fishes undergoes eversion, which is very different to the evagination that occurs in most other vertebrates. Ventricle morphogenesis is key to build an everted telencephalon. Thus, here we use the apical marker zona occludens 1 to understand ventricle morphology, extension of the tela choroidea and the eversion process during early telencephalon development of four teleost species: giant danio (Devario aequipinnatus), blind cavefish (Astyanax mexicanus), medaka (Oryzias latipes), and paradise fish (Macroposus opercularis). In addition, by using immunohistochemistry against tubulin and calcium-binding proteins, we analyze the general morphology of the telencephalon, showing changes in the location and extension of the olfactory bulb and other telencephalic regions from 2 to 5 days of development. We also analyze the impact of abnormal eye and telencephalon morphogenesis on eversion, showing that cyclops mutants do undergo eversion despite very dramatic abnormal eye morphology. We discuss how the formation of the telencephalic ventricle in teleost fish, with its characteristic shape, is a crucial event during eversion.
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Affiliation(s)
- Mónica Folgueira
- Departamento de Bioloxía, Facultade de Ciencias, Centro Interdisciplinar de Química e Bioloxía (CICA), Universidade da Coruña, A Coruña, Spain
| | - Jonathan D W Clarke
- Centre for Developmental Neurobiology, Institute of Psychiatry, Psychology, and Neuroscience, King's College London, London, UK
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7
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Wullimann MF, Mokayes N, Shainer I, Kuehn E, Baier H. Genoarchitectonics of the larval zebrafish diencephalon. J Comp Neurol 2024; 532:e25549. [PMID: 37983970 DOI: 10.1002/cne.25549] [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: 02/10/2023] [Revised: 07/15/2023] [Accepted: 10/03/2023] [Indexed: 11/22/2023]
Abstract
The brain is spatially organized into subdivisions, nuclei and areas, which often correspond to functional and developmental units. A segmentation of brain regions in the form of a consensus atlas facilitates mechanistic studies and is a prerequisite for sharing information among neuroanatomists. Gene expression patterns objectively delineate boundaries between brain regions and provide information about their developmental and evolutionary histories. To generate a detailed molecular map of the larval zebrafish diencephalon, we took advantage of the Max Planck Zebrafish Brain (mapzebrain) atlas, which aligns hundreds of transcript and transgene expression patterns in a shared coordinate system. Inspection and co-visualization of close to 50 marker genes have allowed us to resolve the tripartite prosomeric scaffold of the diencephalon at unprecedented resolution. This approach clarified the genoarchitectonic partitioning of the alar diencephalon into pretectum (alar part of prosomere P1), thalamus (alar part of prosomere P2, with habenula and pineal complex), and prethalamus (alar part of prosomere P3). We further identified the region of the nucleus of the medial longitudinal fasciculus, as well as the posterior and anterior parts of the posterior tuberculum, as molecularly distinct basal parts of prosomeres 1, 2, and 3, respectively. Some of the markers examined allowed us to locate glutamatergic, GABAergic, dopaminergic, serotoninergic, and various neuropeptidergic domains in the larval zebrafish diencephalon. Our molecular neuroanatomical approach has thus (1) yielded an objective and internally consistent interpretation of the prosomere boundaries within the zebrafish forebrain; has (2) produced a list of markers, which in sparse combinations label the subdivisions of the diencephalon; and is (3) setting the stage for further functional and developmental studies in this vertebrate brain.
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Affiliation(s)
- Mario F Wullimann
- Genes - Circuits - Behavior Max-Planck-Institute for Biological Intelligence, Martinsried, Germany
- Department Biology II, Division of Neurobiology, Ludwig-Maximilians-University (LMU Munich), Martinsried, Germany
| | - Nouwar Mokayes
- Genes - Circuits - Behavior Max-Planck-Institute for Biological Intelligence, Martinsried, Germany
| | - Inbal Shainer
- Genes - Circuits - Behavior Max-Planck-Institute for Biological Intelligence, Martinsried, Germany
| | - Enrico Kuehn
- Genes - Circuits - Behavior Max-Planck-Institute for Biological Intelligence, Martinsried, Germany
| | - Herwig Baier
- Genes - Circuits - Behavior Max-Planck-Institute for Biological Intelligence, Martinsried, Germany
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8
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Anneser L, Satou C, Hotz HR, Friedrich RW. Molecular organization of neuronal cell types and neuromodulatory systems in the zebrafish telencephalon. Curr Biol 2024; 34:298-312.e4. [PMID: 38157860 PMCID: PMC10808507 DOI: 10.1016/j.cub.2023.12.003] [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: 10/03/2023] [Revised: 11/30/2023] [Accepted: 12/04/2023] [Indexed: 01/03/2024]
Abstract
The function of neuronal networks is determined not only by synaptic connectivity but also by neuromodulatory systems that broadcast information via distributed connections and volume transmission. To understand the molecular constraints that organize neuromodulatory signaling in the telencephalon of adult zebrafish, we used transcriptomics and additional approaches to delineate cell types, to determine their phylogenetic conservation, and to map the expression of marker genes at high granularity. The combinatorial expression of GPCRs and cell-type markers indicates that all neuronal cell types are subject to modulation by multiple monoaminergic systems and distinct combinations of neuropeptides. Individual cell types were associated with multiple (typically >30) neuromodulatory signaling networks but expressed only a few diagnostic GPCRs at high levels, suggesting that different neuromodulatory systems act in combination, albeit with unequal weights. These results provide a detailed map of cell types and brain areas in the zebrafish telencephalon, identify core components of neuromodulatory networks, highlight the cell-type specificity of neuropeptides and GPCRs, and begin to decipher the logic of combinatorial neuromodulation.
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Affiliation(s)
- Lukas Anneser
- Friedrich Miescher Institute for Biomedical Research, Maulbeerstrasse 66, 4058 Basel, Switzerland
| | - Chie Satou
- Friedrich Miescher Institute for Biomedical Research, Maulbeerstrasse 66, 4058 Basel, Switzerland
| | - Hans-Rudolf Hotz
- Friedrich Miescher Institute for Biomedical Research, Maulbeerstrasse 66, 4058 Basel, Switzerland
| | - Rainer W Friedrich
- Friedrich Miescher Institute for Biomedical Research, Maulbeerstrasse 66, 4058 Basel, Switzerland; University of Basel, 4003 Basel, Switzerland.
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9
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Godino-Gimeno A, Leal E, Chivite M, Tormos E, Rotllant J, Vallone D, Foulkes NS, Míguez JM, Cerdá-Reverter JM. Role of melanocortin system in the locomotor activity rhythms and melatonin secretion as revealed by agouti-signalling protein (asip1) overexpression in zebrafish. J Pineal Res 2024; 76:e12939. [PMID: 38241679 DOI: 10.1111/jpi.12939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 01/04/2024] [Accepted: 01/05/2024] [Indexed: 01/21/2024]
Abstract
Temporal signals such as light and temperature cycles profoundly modulate animal physiology and behaviour. Via endogenous timing mechanisms which are regulated by these signals, organisms can anticipate cyclic environmental changes and thereby enhance their fitness. The pineal gland in fish, through the secretion of melatonin, appears to play a critical role in the circadian system, most likely acting as an element of the circadian clock system. An important output of this circadian clock is the locomotor activity circadian rhythm which is adapted to the photoperiod and thus determines whether animals are diurnal or nocturnal. By using a genetically modified zebrafish strain known as Tg (Xla.Eef1a1:Cau.asip1)iim04, which expresses a higher level of the agouti signalling protein 1 (Asip1), an endogenous antagonist of the melanocortin system, we observed a complete disruption of locomotor activity patterns, which correlates with the ablation of the melatonin daily rhythm. Consistent with this, in vitro experiments also demonstrated that Asip1 inhibits melatonin secretion from the zebrafish pineal gland, most likely through the melanocortin receptors expressed in this gland. Asip1 overexpression also disrupted the expression of core clock genes, including per1a and clock1a, thus blunting circadian oscillation. Collectively, these results implicate the melanocortin system as playing an important role in modulating pineal physiology and, therefore, circadian organisation in zebrafish.
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Affiliation(s)
- Alejandra Godino-Gimeno
- Department of Fish Physiology and Biotechnology, Instituto de Acuicultura de Torre de la Sal, IATS-CSIC, Fish Neurobehaviour Lab, Castellon, Spain
| | - Esther Leal
- Department of Fish Physiology and Biotechnology, Instituto de Acuicultura de Torre de la Sal, IATS-CSIC, Fish Neurobehaviour Lab, Castellon, Spain
| | - Mauro Chivite
- Laboratorio de Fisioloxía Animal, Departamento de Bioloxía Funcional e Ciencias da Saúde, Facultade de Bioloxía and Centro de Investigación Mariña, Universidade de Vigo, Vigo, Spain
| | - Elisabeth Tormos
- Department of Fish Physiology and Biotechnology, Instituto de Acuicultura de Torre de la Sal, IATS-CSIC, Fish Neurobehaviour Lab, Castellon, Spain
| | - Josep Rotllant
- Department of Biotechnology and Aquaculture, Instituto de Investigaciones Marinas, IIM-CSIC, Vigo, Spain
| | - Daniela Vallone
- Institute of Biological and Chemical Systems-Biological Information Processing (IBCS-BIP), Department of Physiological Information Processing, Karlsruhe Institute of Technology (KIT), Eggenstein-Leopoldshafen, Germany
| | - Nicholas S Foulkes
- Institute of Biological and Chemical Systems-Biological Information Processing (IBCS-BIP), Department of Physiological Information Processing, Karlsruhe Institute of Technology (KIT), Eggenstein-Leopoldshafen, Germany
| | - Jesús M Míguez
- Laboratorio de Fisioloxía Animal, Departamento de Bioloxía Funcional e Ciencias da Saúde, Facultade de Bioloxía and Centro de Investigación Mariña, Universidade de Vigo, Vigo, Spain
| | - Jose Miguel Cerdá-Reverter
- Department of Fish Physiology and Biotechnology, Instituto de Acuicultura de Torre de la Sal, IATS-CSIC, Fish Neurobehaviour Lab, Castellon, Spain
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10
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Yáñez J, Eguiguren MH, Anadón R. Neural connections of the torus semicircularis in the adult Zebrafish. J Comp Neurol 2024; 532:e25586. [PMID: 38289191 DOI: 10.1002/cne.25586] [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: 07/27/2023] [Revised: 12/18/2023] [Accepted: 01/09/2024] [Indexed: 02/01/2024]
Abstract
The torus semicircularis (TS) of teleosts is a key midbrain center of the lateral line and acoustic sensory systems. To characterize the TS in adult zebrafish, we studied their connections using the carbocyanine tracers applied to the TS and to other related nuclei and tracts. Two main TS nuclei, central and ventrolateral, were differentiable by their afferent connections. From central TS, (TSc) numerous toropetal cells were labeled bilaterally in several primary octaval nuclei (anterior, magnocellular, descending, and posterior octaval nuclei), in the secondary octaval nucleus, in the caudal octavolateralis nucleus, and in the perilemniscular region. In the midbrain, numerous toropetal cells were labeled in the contralateral TSc. In the diencephalon, toropetal cells labeled from the TSc were observed ipsilaterally in the medial prethalamic nucleus and the periventricular posterior tubercle nucleus. TSc toropetal neurons were also labeled bilaterally in the hypothalamic anterior tuberal nucleus (ATN) and ipsilaterally in the parvicellular preoptic nucleus but not in the telencephalon. Tracer application to the medial octavolateralis nucleus revealed contralateral projections to the ventrolateral TS (TSvl), whereas tracer application to the secondary octaval nucleus labeled fibers bilaterally in TSc and neurons in rostral TSc. The TSc sends ascending fibers to the ipsilateral lateral preglomerular region that, in turn, projects to the pallium. Application of DiI to the optic tectum labeled cells and fibers in the TSvl, whereas application of DiI to the ATN labeled cells and fibers in the TSc. These results reveal that the TSvl and TSc are mainly related with the mechanosensory lateral line and acoustic centers, respectively, and that they show different higher order connections.
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Affiliation(s)
- Julián Yáñez
- Department of Biology, Faculty of Sciences, University of A Coruña, Coruña, Spain
- Interdisciplinary Center for Chemistry and Biology (CICA), University of A Coruña, Coruña, Spain
| | | | - Ramón Anadón
- Department of Functional Biology, Faculty of Biology, University of Santiago de Compostela, Santiago de Compostela, Spain
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11
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Shaw K, Lu C, Liu X, Trudeau VL. Arginine vasopressin injection rescues delayed oviposition in cyp19a1b-/- mutant female zebrafish. Front Endocrinol (Lausanne) 2023; 14:1308675. [PMID: 38144569 PMCID: PMC10739748 DOI: 10.3389/fendo.2023.1308675] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Accepted: 11/23/2023] [Indexed: 12/26/2023] Open
Abstract
In zebrafish, estrogens produced in the ovaries via Cyp19a1a activity are required for both sexual differentiation of the ovary during early development as well as maintenance of the ovarian state during adulthood. The importance of Cyp19a1b that is highly expressed in the brain for female reproduction is still under study. We previously reported that female cyp19a1b -/- mutant zebrafish have significantly lower brain estradiol levels and impaired spawning behavior characterized by an increased latency to oviposition during dyadic sexual behavior encounters. In the current study, we provide evidence that the delayed oviposition in female cyp19a1b -/- mutants is linked to impaired arginine vasopressin (Avp) signaling. Droplet digital PCR experiments revealed that levels of the estrogen receptors, avp, and oxytocin (oxt) are lower in the hypothalamus of mutant females compared to wildtype fish. We then used acute intraperitoneal injections of Avp and Oxt, along with mixtures of their respective receptor antagonists, to determine that Avp can uniquely rescue the delayed oviposition in female cyp19a1b -/- mutants. Using immunohistochemistry, we demonstrated that Cyp19a1b-expressing radial glial cell (RGC) fibers surround and are in contact with Avp-immunopositive neurons in the preoptic areas of the brain. This could provide the neuroanatomical proximity for RGC-derived estrogens to diffuse to and activate estrogen receptors and regulate avp expression levels. Together these findings identify a positive link between Cyp19a1b and Avp for female zebrafish sexual behavior. They also suggest that the female cyp19a1b -/- mutant behavioral phenotype is likely a consequence of impaired processing of Avp-dependent social cues important for mate identification and assessment.
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Affiliation(s)
- Katherine Shaw
- Department of Biology, University of Ottawa, Ottawa, ON, Canada
| | - Chunyu Lu
- Department of Biology, University of Ottawa, Ottawa, ON, Canada
| | - Xiaochun Liu
- State Key Laboratory of Biocontrol, Institute of Aquatic Economic Animals and Guangdong Province Key Laboratory for Aquatic Economic Animals, School of Life Sciences, Sun Yat-Sen University, Guangzhou, China
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12
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Herget U, Ryu S, De Marco RJ. Altered glucocorticoid reactivity and behavioral phenotype in rx3-/- larval zebrafish. Front Endocrinol (Lausanne) 2023; 14:1187327. [PMID: 37484970 PMCID: PMC10358986 DOI: 10.3389/fendo.2023.1187327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Accepted: 06/21/2023] [Indexed: 07/25/2023] Open
Abstract
Introduction The transcription factor rx3 is important for the formation of the pituitary and parts of the hypothalamus. Mutant animals lacking rx3 function have been well characterized in developmental studies, but relatively little is known about their behavioral phenotypes. Methods We used cell type staining to reveal differences in stress axis architecture, and performed cortisol measurements and behavior analysis to study both hormonal and behavioral stress responses in rx3 mutants. Results and Discussion Consistent with the role of rx3 in hypothalamus and pituitary development, we show a distinct loss of corticotrope cells involved in stress regulation, severe reduction of pituitary innervation by hypothalamic cells, and lack of stress-induced cortisol release in rx3 mutants. Interestingly, despite these deficits, we report that rx3-/- larval zebrafish can still display nominal behavioral responses to both stressful and non-stressful stimuli. However, unlike wildtypes, mutants lacking proper pituitary-interrenal function do not show enhanced behavioral performance under moderate stress level, supporting the view that corticotroph cells are not required for behavioral responses to some types of stressful stimuli but modulate subtle behavioral adjustments under moderate stress.
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Affiliation(s)
- Ulrich Herget
- Research Group Developmental Genetics of the Nervous System, Max Planck Institute for Medical Research, Heidelberg, Germany
- Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA, United States
| | - Soojin Ryu
- Research Group Developmental Genetics of the Nervous System, Max Planck Institute for Medical Research, Heidelberg, Germany
- Living Systems Institute, College of Medicine and Health, University of Exeter, Exeter, United Kingdom
| | - Rodrigo J. De Marco
- Research Group Developmental Genetics of the Nervous System, Max Planck Institute for Medical Research, Heidelberg, Germany
- School of Biological and Environmental Sciences, Faculty of Science, Liverpool John Moores University, Liverpool, United Kingdom
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13
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Sobrido‐Cameán D, González‐Llera L, Anadón R, Barreiro‐Iglesias A. Organization of the corticotropin-releasing hormone and corticotropin-releasing hormone-binding protein systems in the central nervous system of the sea lamprey Petromyzon marinus. J Comp Neurol 2023; 531:58-88. [PMID: 36150899 PMCID: PMC9826344 DOI: 10.1002/cne.25412] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 08/27/2022] [Accepted: 08/30/2022] [Indexed: 01/11/2023]
Abstract
The expression of the corticotropin-releasing hormone (PmCRH) and the CRH-binding protein (PmCRHBP) mRNAs was studied by in situ hybridization in the brain of prolarvae, larvae, and adults of the sea lamprey Petromyzon marinus. We also generated an antibody against the PmCRH mature peptide to study the distribution of PmCRH-immunoreactive cells and fibers. PmCRH immunohistochemistry was combined with antityrosine hydroxylase immunohistochemistry, PmCRHBP in situ hybridization, or neurobiotin transport from the spinal cord. The most numerous PmCRH-expressing cells were observed in the magnocellular preoptic nucleus-paraventricular nucleus and in the superior and medial rhombencephalic reticular formation. PmCRH expression was more extended in adults than in larvae, and some cell populations were mainly (olfactory bulb) or only (striatum, ventral hypothalamus, prethalamus) observed in adults. The preopto-paraventricular fibers form conspicuous tracts coursing toward the neurohypophysis, but many immunoreactive fibers were also observed coursing in many other brain regions. Brain descending fibers in the spinal cord mainly come from cells located in the isthmus and in the medial rhombencephalic reticular nucleus. The distribution of PmCRHBP-expressing neurons was different from that of PmCRH cells, with cells mainly present in the septum, striatum, preoptic region, tuberal hypothalamus, pretectum, pineal complex, isthmus, reticular formation, and spinal cord. Again, expression in adults was more extended than in larvae. PmCRH- and PmCRHBP-expressing cells are different, excluding colocalization of these substances in the same neuron. Present findings reveal a complex CRH/CRHBP system in the brain of the oldest extant vertebrate group, the agnathans, which shows similarities but important divergences with that of mammals.
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Affiliation(s)
- Daniel Sobrido‐Cameán
- Department of Functional Biology, CIBUS, Faculty of BiologyUniversidade de Santiago de CompostelaSantiago de CompostelaSpain,Department of ZoologyUniversity of CambridgeCambridgeUK
| | - Laura González‐Llera
- Department of Functional Biology, CIBUS, Faculty of BiologyUniversidade de Santiago de CompostelaSantiago de CompostelaSpain
| | - Ramón Anadón
- Department of Functional Biology, CIBUS, Faculty of BiologyUniversidade de Santiago de CompostelaSantiago de CompostelaSpain
| | - Antón Barreiro‐Iglesias
- Department of Functional Biology, CIBUS, Faculty of BiologyUniversidade de Santiago de CompostelaSantiago de CompostelaSpain
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14
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Ma M, Brunal AA, Clark KC, Studtmann C, Stebbins K, Higashijima SI, Pan YA. Deficiency in the cell-adhesion molecule dscaml1 impairs hypothalamic CRH neuron development and perturbs normal neuroendocrine stress axis function. Front Cell Dev Biol 2023; 11:1113675. [PMID: 36875755 PMCID: PMC9978177 DOI: 10.3389/fcell.2023.1113675] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Accepted: 01/30/2023] [Indexed: 02/18/2023] Open
Abstract
The corticotropin-releasing hormone (CRH)-expressing neurons in the hypothalamus are critical regulators of the neuroendocrine stress response pathway, known as the hypothalamic-pituitary-adrenal (HPA) axis. As developmental vulnerabilities of CRH neurons contribute to stress-associated neurological and behavioral dysfunctions, it is critical to identify the mechanisms underlying normal and abnormal CRH neuron development. Using zebrafish, we identified Down syndrome cell adhesion molecule like-1 (dscaml1) as an integral mediator of CRH neuron development and necessary for establishing normal stress axis function. In dscaml1 mutant animals, hypothalamic CRH neurons had higher crhb (the CRH homolog in zebrafish) expression, increased cell number, and reduced cell death compared to wild-type controls. Physiologically, dscaml1 mutant animals had higher baseline stress hormone (cortisol) levels and attenuated responses to acute stressors. Together, these findings identify dscaml1 as an essential factor for stress axis development and suggest that HPA axis dysregulation may contribute to the etiology of human DSCAML1-linked neuropsychiatric disorders.
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Affiliation(s)
- Manxiu Ma
- Fralin Biomedical Research Institute at Virginia Tech Carilion, Virginia Tech, Roanoke, VA, United States
| | - Alyssa A Brunal
- Fralin Biomedical Research Institute at Virginia Tech Carilion, Virginia Tech, Roanoke, VA, United States.,Translational Biology Medicine and Health Graduate Program, Virginia Tech, Blacksburg, VA, United States
| | - Kareem C Clark
- Fralin Biomedical Research Institute at Virginia Tech Carilion, Virginia Tech, Roanoke, VA, United States
| | - Carleigh Studtmann
- Fralin Biomedical Research Institute at Virginia Tech Carilion, Virginia Tech, Roanoke, VA, United States.,Translational Biology Medicine and Health Graduate Program, Virginia Tech, Blacksburg, VA, United States
| | - Katelyn Stebbins
- Fralin Biomedical Research Institute at Virginia Tech Carilion, Virginia Tech, Roanoke, VA, United States.,Translational Biology Medicine and Health Graduate Program, Virginia Tech, Blacksburg, VA, United States.,Virginia Tech Carilion School of Medicine, Roanoke, VA, United States
| | - Shin-Ichi Higashijima
- National Institutes of Natural Sciences, Exploratory Research Center on Life and Living Systems, National Institute for Basic Biology, Okazaki, Aichi, Japan
| | - Y Albert Pan
- Fralin Biomedical Research Institute at Virginia Tech Carilion, Virginia Tech, Roanoke, VA, United States.,Department of Biomedical Sciences and Pathobiology, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA, United States.,Department of Psychiatry and Behavioral Medicine, Virginia Tech Carilion School of Medicine, Roanoke, VA, United States
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15
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Norland S, Eilertsen M, Rønnestad I, Helvik JV, Gomes AS. Mapping key neuropeptides involved in the melanocortin system in Atlantic salmon (Salmo salar) brain. J Comp Neurol 2023; 531:89-115. [PMID: 36217593 PMCID: PMC9828751 DOI: 10.1002/cne.25415] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Revised: 08/29/2022] [Accepted: 09/01/2022] [Indexed: 01/12/2023]
Abstract
The melanocortin system is a key regulator of appetite and food intake in vertebrates. This system includes the neuropeptides neuropeptide y (NPY), agouti-related peptide (AGRP), cocaine- and amphetamine-regulated transcript (CART), and pro-opiomelanocortin (POMC). An important center for appetite control in mammals is the hypothalamic arcuate nucleus, with neurons that coexpress either the orexigenic NPY/AGRP or the anorexigenic CART/POMC neuropeptides. In ray-finned fishes, such a center is less characterized. The Atlantic salmon (Salmo salar) has multiple genes of these neuropeptides due to whole-genome duplication events. To better understand the potential involvement of the melanocortin system in appetite and food intake control, we have mapped the mRNA expression of npy, agrp, cart, and pomc in the brain of Atlantic salmon parr using in situ hybridization. After identifying hypothalamic mRNA expression, we investigated the possible intracellular coexpression of npy/agrp and cart/pomc in the tuberal hypothalamus by fluorescent in situ hybridization. The results showed that the neuropeptides were widely distributed, especially in sensory and neuroendocrine brain regions. In the hypothalamic lateral tuberal nucleus, the putative homolog to the mammalian arcuate nucleus, npya, agrp1, cart2b, and pomca were predominantly localized in distinct neurons; however, some neurons coexpressed cart2b/pomca. This is the first demonstration of coexpression of cart2b/pomca in the tuberal hypothalamus of a teleost. Collectively, our data suggest that the lateral tuberal nucleus is the center for appetite control in salmon, similar to that of mammals. Extrahypothalamic brain regions might also be involved in regulating food intake, including the olfactory bulb, telencephalon, midbrain, and hindbrain.
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Affiliation(s)
- Sissel Norland
- Department of Biological SciencesUniversity of BergenBergenNorway
| | | | - Ivar Rønnestad
- Department of Biological SciencesUniversity of BergenBergenNorway
| | - Jon Vidar Helvik
- Department of Biological SciencesUniversity of BergenBergenNorway
| | - Ana S. Gomes
- Department of Biological SciencesUniversity of BergenBergenNorway
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16
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Wullimann MF. The Neuromeric/Prosomeric Model in Teleost Fish Neurobiology. BRAIN, BEHAVIOR AND EVOLUTION 2022; 97:336-360. [PMID: 35728561 PMCID: PMC9808694 DOI: 10.1159/000525607] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Accepted: 06/08/2022] [Indexed: 01/07/2023]
Abstract
The neuromeric/prosomeric model has been rejuvenated by Puelles and Rubenstein [Trends Neurosci. 1993;16(11):472-9]. Here, its application to the (teleostean) fish brain is detailed, beginning with a historical account. The second part addresses three main issues with particular interest for fish neuroanatomy and looks at the impact of the neuromeric model on their understanding. The first one is the occurrence of four early migrating forebrain areas (M1 through M4) in teleosts and their comparative interpretation. The second issue addresses the complex development and neuroanatomy of the teleostean alar and basal hypothalamus. The third topic is the vertebrate dopaminergic system, with the focus on some teleostean peculiarities. Most of the information will be coming from zebrafish studies, although the general ductus is a comparative one. Throughout the manuscript, comparative developmental and organizational aspects of the teleostean amygdala are discussed. One particular focus is cellular migration streams into the medial amygdala.
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Affiliation(s)
- Mario F. Wullimann
- Division of Neurobiology, Department Biologie II, Ludwig-Maximilians-Universität München (LMU Munich), Martinsried, Germany,Department Genes-Circuits-Behavior, Max-Planck-Institute for Biological Intelligence (i.F.), Martinsried, Germany,*Mario F. Wullimann,
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17
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Eachus H, Ryu S, Placzek M, Wood J. Zebrafish as a model to investigate the CRH axis and interactions with DISC1. CURRENT OPINION IN ENDOCRINE AND METABOLIC RESEARCH 2022; 26:100383. [PMID: 36632608 PMCID: PMC9823094 DOI: 10.1016/j.coemr.2022.100383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Release of corticotropin-releasing hormone (CRH) from CRH neurons activates the hypothalamo-pituitary-adrenal (HPA) axis, one of the main physiological stress response systems. Complex feedback loops operate in the HPA axis and understanding the neurobiological mechanisms regulating CRH neurons is of great importance in the context of stress disorders. In this article, we review how in vivo studies in zebrafish have advanced knowledge of the neurobiology of CRH neurons. Disrupted-in-schizophrenia 1 (DISC1) mutant zebrafish have blunted stress responses and can be used to model human stress disorders. We propose that DISC1 influences the development and functioning of CRH neurons as a mechanism linking DISC1 to psychiatric disorders.
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Affiliation(s)
- Helen Eachus
- Living Systems Institute and College of Medicine and Health, University of Exeter, Exeter, United Kingdom
| | - Soojin Ryu
- Living Systems Institute and College of Medicine and Health, University of Exeter, Exeter, United Kingdom
- Institute of Human Genetics, University Medical Center, Johannes Gutenberg University Mainz, Mainz, Germany
| | - Marysia Placzek
- School of Biosciences and Bateson Centre, University of Sheffield, Sheffield, United Kingdom
| | - Jonathan Wood
- Sheffield Institute for Translational Neuroscience and Department of Neuroscience, University of Sheffield, Sheffield, United Kingdom
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18
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Wagle M, Zarei M, Lovett-Barron M, Poston KT, Xu J, Ramey V, Pollard KS, Prober DA, Schulkin J, Deisseroth K, Guo S. Brain-wide perception of the emotional valence of light is regulated by distinct hypothalamic neurons. Mol Psychiatry 2022; 27:3777-3793. [PMID: 35484242 PMCID: PMC9613822 DOI: 10.1038/s41380-022-01567-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 02/25/2022] [Accepted: 04/06/2022] [Indexed: 02/08/2023]
Abstract
Salient sensory stimuli are perceived by the brain, which guides both the timing and outcome of behaviors in a context-dependent manner. Light is such a stimulus, which is used in treating mood disorders often associated with a dysregulated hypothalamic-pituitary-adrenal stress axis. Relationships between the emotional valence of light and the hypothalamus, and how they interact to exert brain-wide impacts remain unclear. Employing larval zebrafish with analogous hypothalamic systems to mammals, we show in free-swimming animals that hypothalamic corticotropin releasing factor (CRFHy) neurons promote dark avoidance, and such role is not shared by other hypothalamic peptidergic neurons. Single-neuron projection analyses uncover processes extended by individual CRFHy neurons to multiple targets including sensorimotor and decision-making areas. In vivo calcium imaging uncovers a complex and heterogeneous response of individual CRFHy neurons to the light or dark stimulus, with a reduced overall sum of CRF neuronal activity in the presence of light. Brain-wide calcium imaging under alternating light/dark stimuli further identifies distinct and distributed photic response neuronal types. CRFHy neuronal ablation increases an overall representation of light in the brain and broadly enhances the functional connectivity associated with an exploratory brain state. These findings delineate brain-wide photic perception, uncover a previously unknown role of CRFHy neurons in regulating the perception and emotional valence of light, and suggest that light therapy may alleviate mood disorders through reducing an overall sum of CRF neuronal activity.
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Affiliation(s)
- Mahendra Wagle
- Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, CA, 94143-2811, USA
| | - Mahdi Zarei
- Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, CA, 94143-2811, USA
| | - Matthew Lovett-Barron
- Department of Bioengineering, Howard Hughes Medical Institute, Stanford University, Stanford, CA, USA
- Neurobiology Section, Division of Biological Sciences, University of California, San Diego, La Jolla, CA, USA
| | - Kristina Tyler Poston
- Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, CA, 94143-2811, USA
| | - Jin Xu
- Tianqiao and Chrissy Chen Institute for Neuroscience, Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA, 91125, USA
| | - Vince Ramey
- Biophysics Graduate Group, University of California, Berkeley, CA, USA
- Invitae Inc., San Francisco, CA, USA
| | - Katherine S Pollard
- Gladstone Institute of Data Science & Biotechnology, San Francisco, CA, USA
- Department of Epidemiology & Biostatistics, University of California, San Francisco, CA, USA
- Chan Zuckerberg Biohub, San Francisco, CA, USA
| | - David A Prober
- Tianqiao and Chrissy Chen Institute for Neuroscience, Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA, 91125, USA
| | - Jay Schulkin
- Department of Obstetrics & Gynecology, School of Medicine, University of Washington, Seattle, WA, USA
| | - Karl Deisseroth
- Department of Bioengineering, Howard Hughes Medical Institute, Stanford University, Stanford, CA, USA
| | - Su Guo
- Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, CA, 94143-2811, USA.
- Programs in Human Genetics and Biological Sciences, Kavli Institute of Fundamental Neuroscience, The Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, Bakar Aging Research Institute, University of California, San Francisco, CA, 94143-2811, USA.
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19
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Santos-Durán GN, Ferreiro-Galve S, Mazan S, Anadón R, Rodríguez-Moldes I, Candal E. Developmental genoarchitectonics as a key tool to interpret the mature anatomy of the chondrichthyan hypothalamus according to the prosomeric model. Front Neuroanat 2022; 16:901451. [PMID: 35991967 PMCID: PMC9385951 DOI: 10.3389/fnana.2022.901451] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Accepted: 06/30/2022] [Indexed: 11/29/2022] Open
Abstract
The hypothalamus is a key vertebrate brain region involved in survival and physiological functions. Understanding hypothalamic organization and evolution is important to deciphering many aspects of vertebrate biology. Recent comparative studies based on gene expression patterns have proposed the existence of hypothalamic histogenetic domains (paraventricular, TPa/PPa; subparaventricular, TSPa/PSPa; tuberal, Tu/RTu; perimamillary, PM/PRM; and mamillary, MM/RM), revealing conserved evolutionary trends. To shed light on the functional relevance of these histogenetic domains, this work aims to interpret the location of developed cell groups according to the prosomeric model in the hypothalamus of the catshark Scyliorhinus canicula, a representative of Chondrichthyans (the sister group of Osteichthyes, at the base of the gnathostome lineage). To this end, we review in detail the expression patterns of ScOtp, ScDlx2, and ScPitx2, as well as Pax6-immunoreactivity in embryos at stage 32, when the morphology of the adult catshark hypothalamus is already organized. We also propose homologies with mammals when possible. This study provides a comprehensive tool to better understand previous and novel data on hypothalamic development and evolution.
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Affiliation(s)
- Gabriel N. Santos-Durán
- Grupo NEURODEVO, Departamento de Bioloxía Funcional, Universidade de Santiago de Compostela, Santiago, Spain
| | - Susana Ferreiro-Galve
- Grupo NEURODEVO, Departamento de Bioloxía Funcional, Universidade de Santiago de Compostela, Santiago, Spain
| | - Sylvie Mazan
- CNRS-UMR 7232, Sorbonne Universités, UPMC Univ Paris 06, Observatoire Océanologique, Paris, France
| | - Ramón Anadón
- Grupo NEURODEVO, Departamento de Bioloxía Funcional, Universidade de Santiago de Compostela, Santiago, Spain
| | - Isabel Rodríguez-Moldes
- Grupo NEURODEVO, Departamento de Bioloxía Funcional, Universidade de Santiago de Compostela, Santiago, Spain
| | - Eva Candal
- Grupo NEURODEVO, Departamento de Bioloxía Funcional, Universidade de Santiago de Compostela, Santiago, Spain
- *Correspondence: Eva Candal,
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Aquatic Freshwater Vertebrate Models of Epilepsy Pathology: Past Discoveries and Future Directions for Therapeutic Discovery. Int J Mol Sci 2022; 23:ijms23158608. [PMID: 35955745 PMCID: PMC9368815 DOI: 10.3390/ijms23158608] [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: 05/06/2022] [Revised: 07/29/2022] [Accepted: 07/30/2022] [Indexed: 12/04/2022] Open
Abstract
Epilepsy is an international public health concern that greatly affects patients’ health and lifestyle. About 30% of patients do not respond to available therapies, making new research models important for further drug discovery. Aquatic vertebrates present a promising avenue for improved seizure drug screening and discovery. Zebrafish (Danio rerio) and African clawed frogs (Xenopus laevis and tropicalis) are increasing in popularity for seizure research due to their cost-effective housing and rearing, similar genome to humans, ease of genetic manipulation, and simplicity of drug dosing. These organisms have demonstrated utility in a variety of seizure-induction models including chemical and genetic methods. Past studies with these methods have produced promising data and generated questions for further applications of these models to promote discovery of drug-resistant seizure pathology and lead to effective treatments for these patients.
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21
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Visual recognition of social signals by a tectothalamic neural circuit. Nature 2022; 608:146-152. [PMID: 35831500 PMCID: PMC9352588 DOI: 10.1038/s41586-022-04925-5] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Accepted: 06/02/2022] [Indexed: 12/23/2022]
Abstract
Social affiliation emerges from individual-level behavioural rules that are driven by conspecific signals1-5. Long-distance attraction and short-distance repulsion, for example, are rules that jointly set a preferred interanimal distance in swarms6-8. However, little is known about their perceptual mechanisms and executive neural circuits3. Here we trace the neuronal response to self-like biological motion9,10, a visual trigger for affiliation in developing zebrafish2,11. Unbiased activity mapping and targeted volumetric two-photon calcium imaging revealed 21 activity hotspots distributed throughout the brain as well as clustered biological-motion-tuned neurons in a multimodal, socially activated nucleus of the dorsal thalamus. Individual dorsal thalamus neurons encode local acceleration of visual stimuli mimicking typical fish kinetics but are insensitive to global or continuous motion. Electron microscopic reconstruction of dorsal thalamus neurons revealed synaptic input from the optic tectum and projections into hypothalamic areas with conserved social function12-14. Ablation of the optic tectum or dorsal thalamus selectively disrupted social attraction without affecting short-distance repulsion. This tectothalamic pathway thus serves visual recognition of conspecifics, and dissociates neuronal control of attraction from repulsion during social affiliation, revealing a circuit underpinning collective behaviour.
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22
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Eugenin von Bernhardi J, Biechl D, Miek L, Herget U, Ryu S, Wullimann MF. A versatile transcription factor: Multiple roles of orthopedia a (otpa) beyond its restricted localization in dopaminergic systems of developing and adult zebrafish (Danio rerio) brains. J Comp Neurol 2022; 530:2537-2561. [PMID: 35708548 DOI: 10.1002/cne.25351] [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: 12/01/2021] [Revised: 05/09/2022] [Accepted: 05/11/2022] [Indexed: 11/06/2022]
Abstract
Many transcription factors boost neural development and differentiation in specific directions and serve for identifying similar or homologous structures across species. The expression of Orthopedia (Otp) is critical for the development of certain cell groups along the vertebrate neuraxis, for example, the medial amygdala or hypothalamic neurosecretory neurons. Therefore, the primary focus of the present study is the distribution of Orthopedia a (Otpa) in the larval and adult zebrafish (Danio rerio) brain. Since Otpa is also critical for the development of zebrafish basal diencephalic dopaminergic cells, colocalization of Otpa with the catecholamine synthesizing enzyme tyrosine hydroxylase (TH) is studied. Cellular colocalization of Otpa and dopamine is only seen in magnocellular neurons of the periventricular posterior tubercular nucleus and in the posterior tuberal nucleus. Otpa-positive cells occur in many additional structures along the zebrafish neuraxis, from the secondary prosencephalon down to the hindbrain. Furthermore, Otpa expression is studied in shh-GFP and islet1-GFP transgenic zebrafish. Otpa-positive cells only express shh in dopaminergic magnocellular periventricular posterior tubercular cells, and only colocalize with islet1-GFP in the ventral zone and prerecess caudal periventricular hypothalamic zone and the perilemniscal nucleus. The scarcity of cellular colocalization of Otpa in islet1-GFP cells indicates that the Shh-islet1 neurogenetic pathway is not active in most Otpa-expressing domains. Our analysis reveals detailed correspondences between mouse and zebrafish forebrain territories including the zebrafish intermediate nucleus of the ventral telencephalon and the mouse medial amygdala. The zebrafish preoptic Otpa-positive domain represents the neuropeptidergic supraopto-paraventricular region of all tetrapods. Otpa domains in the zebrafish basal plate hypothalamus suggest that the ventral periventricular hypothalamic zone corresponds to the otp-expressing basal hypothalamic tuberal field in the mouse. Furthermore, the mouse otp domain in the mammillary hypothalamus compares partly to our Otpa-positive domain in the prerecess caudal periventricular hypothalamic zone (Hc-a).
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Affiliation(s)
- Jaime Eugenin von Bernhardi
- Faculty of Biology, Division of Neurobiology, Ludwig-Maximilians-Universität Munich, München, Bavaria, Germany.,The Solomon Snyder Department of Neuroscience, Johns Hopkins Univeristy, Baltimore, Maryland, USA
| | - Daniela Biechl
- Faculty of Biology, Division of Neurobiology, Ludwig-Maximilians-Universität Munich, München, Bavaria, Germany
| | - Laura Miek
- Faculty of Biology, Division of Neurobiology, Ludwig-Maximilians-Universität Munich, München, Bavaria, Germany
| | - Ulrich Herget
- Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, California, USA
| | - Soojin Ryu
- Living Systems Institute University of Exeter, Exeter, Devon, UK.,College of Medicine and Health, University of Exeter, Exeter, Devon, UK
| | - Mario F Wullimann
- Faculty of Biology, Division of Neurobiology, Ludwig-Maximilians-Universität Munich, München, Bavaria, Germany.,Max-Planck-Institute of Neurobiology, Planegg-Martinsried, Germany
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23
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Turner KJ, Hawkins TA, Henriques PM, Valdivia LE, Bianco IH, Wilson SW, Folgueira M. A Structural Atlas of the Developing Zebrafish Telencephalon Based on Spatially-Restricted Transgene Expression. Front Neuroanat 2022; 16:840924. [PMID: 35721460 PMCID: PMC9198225 DOI: 10.3389/fnana.2022.840924] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Accepted: 04/22/2022] [Indexed: 11/28/2022] Open
Abstract
Zebrafish telencephalon acquires an everted morphology by a two-step process that occurs from 1 to 5 days post-fertilization (dpf). Little is known about how this process affects the positioning of discrete telencephalic cell populations, hindering our understanding of how eversion impacts telencephalic structural organization. In this study, we characterize the neurochemistry, cycle state and morphology of an EGFP positive (+) cell population in the telencephalon of Et(gata2:EGFP)bi105 transgenic fish during eversion and up to 20dpf. We map the transgene insertion to the early-growth-response-gene-3 (egr3) locus and show that EGFP expression recapitulates endogenous egr3 expression throughout much of the pallial telencephalon. Using the gata2:EGFPbi105 transgene, in combination with other well-characterized transgenes and structural markers, we track the development of various cell populations in the zebrafish telencephalon as it undergoes the morphological changes underlying eversion. These datasets were registered to reference brains to form an atlas of telencephalic development at key stages of the eversion process (1dpf, 2dpf, and 5dpf) and compared to expression in adulthood. Finally, we registered gata2:EGFPbi105 expression to the Zebrafish Brain Browser 6dpf reference brain (ZBB, see Marquart et al., 2015, 2017; Tabor et al., 2019), to allow comparison of this expression pattern with anatomical data already in ZBB.
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Affiliation(s)
- Katherine J. Turner
- Department of Cell and Developmental Biology, University College London, London, United Kingdom
| | - Thomas A. Hawkins
- Department of Cell and Developmental Biology, University College London, London, United Kingdom
| | - Pedro M. Henriques
- Department of Neuroscience, Physiology and Pharmacology, University College London, London, United Kingdom
| | - Leonardo E. Valdivia
- Center for Integrative Biology, Facultad de Ciencias, Universidad Mayor, Santiago, Chile
- Escuela de Biotecnología, Facultad de Ciencias, Universidad Mayor, Santiago, Chile
| | - Isaac H. Bianco
- Department of Neuroscience, Physiology and Pharmacology, University College London, London, United Kingdom
| | - Stephen W. Wilson
- Department of Cell and Developmental Biology, University College London, London, United Kingdom
- *Correspondence: Stephen W. Wilson,
| | - Mónica Folgueira
- Department of Cell and Developmental Biology, University College London, London, United Kingdom
- Neurover Group, Centro de Investigacións Científicas Avanzadas (CICA), Facultade de Ciencias, Department of Biology, University of A Coruña, A Coruña, Spain
- Mónica Folgueira,
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24
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Metwalli AH, Abellán A, Freixes J, Pross A, Desfilis E, Medina L. Distinct Subdivisions in the Transition Between Telencephalon and Hypothalamus Produce Otp and Sim1 Cells for the Extended Amygdala in Sauropsids. Front Neuroanat 2022; 16:883537. [PMID: 35645737 PMCID: PMC9133795 DOI: 10.3389/fnana.2022.883537] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Accepted: 03/29/2022] [Indexed: 12/14/2022] Open
Abstract
Based on the coexpression of the transcription factors Foxg1 and Otp, we recently identified in the mouse a new radial embryonic division named the telencephalon-opto-hypothalamic (TOH) domain that produces the vast majority of glutamatergic neurons found in the medial extended amygdala. To know whether a similar division exists in other amniotes, we carried out double labeling of Foxg1 and Otp in embryonic brain sections of two species of sauropsids, the domestic chicken (Gallus gallus domesticus), and the long-tailed lacertid lizard (Psammodromus algirus). Since in mice Otp overlaps with the transcription factor Sim1, we also analyzed the coexpression of Foxg1 and Sim1 and compared it to the glutamatergic cell marker VGLUT2. Our results showed that the TOH domain is also present in sauropsids and produces subpopulations of Otp/Foxg1 and Sim1/Foxg1 cells for the medial extended amygdala. In addition, we found Sim1/Foxg1 cells that invade the central extended amygdala, and other Otp and Sim1 cells not coexpressing Foxg1 that invade the extended and the pallial amygdala. These different Otp and Sim1 cell subpopulations, with or without Foxg1, are likely glutamatergic. Our results highlight the complex divisional organization of telencephalon-hypothalamic transition, which contributes to the heterogeneity of amygdalar cells. In addition, our results open new venues to study further the amygdalar cells derived from different divisions around this transition zone and their relationship to other cells derived from the pallium or the subpallium.
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Affiliation(s)
- Alek H. Metwalli
- Department of Experimental Medicine, University of Lleida, Lleida, Spain
- Lleida Biomedical Research Institute’s Dr. Pifarré Foundation (IRBLleida), Lleida, Spain
| | - Antonio Abellán
- Department of Experimental Medicine, University of Lleida, Lleida, Spain
- Lleida Biomedical Research Institute’s Dr. Pifarré Foundation (IRBLleida), Lleida, Spain
| | - Júlia Freixes
- Department of Experimental Medicine, University of Lleida, Lleida, Spain
| | - Alessandra Pross
- Department of Experimental Medicine, University of Lleida, Lleida, Spain
- Lleida Biomedical Research Institute’s Dr. Pifarré Foundation (IRBLleida), Lleida, Spain
| | - Ester Desfilis
- Department of Experimental Medicine, University of Lleida, Lleida, Spain
- Lleida Biomedical Research Institute’s Dr. Pifarré Foundation (IRBLleida), Lleida, Spain
| | - Loreta Medina
- Department of Experimental Medicine, University of Lleida, Lleida, Spain
- Lleida Biomedical Research Institute’s Dr. Pifarré Foundation (IRBLleida), Lleida, Spain
- *Correspondence: Loreta Medina,
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25
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Wee CL, Song E, Nikitchenko M, Herrera KJ, Wong S, Engert F, Kunes S. Social isolation modulates appetite and avoidance behavior via a common oxytocinergic circuit in larval zebrafish. Nat Commun 2022; 13:2573. [PMID: 35545618 PMCID: PMC9095721 DOI: 10.1038/s41467-022-29765-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Accepted: 03/28/2022] [Indexed: 12/13/2022] Open
Abstract
Animal brains have evolved to encode social stimuli and transform these representations into advantageous behavioral responses. The commonalities and differences of these representations across species are not well-understood. Here, we show that social isolation activates an oxytocinergic (OXT), nociceptive circuit in the larval zebrafish hypothalamus and that chemical cues released from conspecific animals are potent modulators of this circuit's activity. We delineate an olfactory to subpallial pathway that transmits chemical social cues to OXT circuitry, where they are transformed into diverse outputs simultaneously regulating avoidance and feeding behaviors. Our data allow us to propose a model through which social stimuli are integrated within a fundamental neural circuit to mediate diverse adaptive behaviours.
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Affiliation(s)
- Caroline L Wee
- Department of Molecular and Cellular Biology and Center for Brain Science, Harvard University, Cambridge, Massachusetts, USA
- Program in Neuroscience, Department of Neurobiology, Harvard Medical School, Boston, Massachusetts, USA
- Institute of Molecular and Cell Biology, A*STAR, Singapore
| | - Erin Song
- Department of Molecular and Cellular Biology and Center for Brain Science, Harvard University, Cambridge, Massachusetts, USA
| | - Maxim Nikitchenko
- Department of Molecular and Cellular Biology and Center for Brain Science, Harvard University, Cambridge, Massachusetts, USA
- Duke University, Durham, North Carolina, USA
| | - Kristian J Herrera
- Department of Molecular and Cellular Biology and Center for Brain Science, Harvard University, Cambridge, Massachusetts, USA
| | - Sandy Wong
- Department of Molecular and Cellular Biology and Center for Brain Science, Harvard University, Cambridge, Massachusetts, USA
| | - Florian Engert
- Department of Molecular and Cellular Biology and Center for Brain Science, Harvard University, Cambridge, Massachusetts, USA.
| | - Samuel Kunes
- Department of Molecular and Cellular Biology and Center for Brain Science, Harvard University, Cambridge, Massachusetts, USA.
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26
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Yi W, Mueller T, Rücklin M, Richardson MK. Developmental neuroanatomy of the rosy bitterling Rhodeus ocellatus (Teleostei: Cypriniformes)-A microCT study. J Comp Neurol 2022; 530:2132-2153. [PMID: 35470436 PMCID: PMC9245027 DOI: 10.1002/cne.25324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Revised: 02/09/2022] [Accepted: 03/17/2022] [Indexed: 11/11/2022]
Abstract
Bitterlings are carp-like teleost fish (Cypriniformes: Acheilanathidae) known for their specialized brood parasitic lifestyle. Bitterling embryos, in fact, develop inside the gill chamber of their freshwater mussel hosts. However, little is known about how their parasitic lifestyle affects brain development in comparison to nonparasitic species. Here, we document the development of the brain of the rosy bitterling, Rhodeus ocellatus, at four embryonic stages of 165, 185, 210, 235 hours postfertilization (hpf) using micro-computed tomography (microCT). Focusing on developmental regionalization and brain ventricular organization, we relate the development of the brain divisions to those described for zebrafish using the prosomeric model as a reference paradigm. Segmentation and three-dimensional visualization of the ventricular system allowed us to identify changes in the longitudinal brain axis as a result of cephalic flexure during development. The results show that during early embryonic and larval development, histological differentiation, tissue boundaries, periventricular proliferation zones, and ventricular spaces are all detectable by microCT. The results of this study visualized with differential CT profiles are broadly consistent with comparable histological studies, and with the genoarchitecture of teleosts like the zebrafish. Compared to the zebrafish, our study identifies distinct developmental heterochronies in the rosy bitterling, such as a precocious development of the inferior lobe.
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Affiliation(s)
- Wenjing Yi
- Institute of Biology, University of Leiden, Sylvius Laboratory, Leiden, the Netherlands.,Vertebrate Evolution, Development and Ecology, Naturalis Biodiversity Center, Leiden, the Netherlands
| | - Thomas Mueller
- Vertebrate Evolution, Development and Ecology, Naturalis Biodiversity Center, Leiden, the Netherlands.,Division of Biology, Kansas State University, Manhattan, Kansas, USA
| | - Martin Rücklin
- Institute of Biology, University of Leiden, Sylvius Laboratory, Leiden, the Netherlands.,Vertebrate Evolution, Development and Ecology, Naturalis Biodiversity Center, Leiden, the Netherlands
| | - Michael K Richardson
- Institute of Biology, University of Leiden, Sylvius Laboratory, Leiden, the Netherlands.,Vertebrate Evolution, Development and Ecology, Naturalis Biodiversity Center, Leiden, the Netherlands
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27
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The neuropeptide Pth2 modulates social behavior and anxiety in zebrafish. iScience 2022; 25:103868. [PMID: 35243231 PMCID: PMC8861652 DOI: 10.1016/j.isci.2022.103868] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Revised: 12/16/2021] [Accepted: 02/01/2022] [Indexed: 01/09/2023] Open
Abstract
Behavior is context-dependent and often modulated by an animal’s internal state. In particular, different social contexts can alter anxiety levels and modulate social behavior. The vertebrate-specific neuropeptide parathyroid hormone 2 (pth2) is regulated by the presence of conspecifics in zebrafish. As its cognate receptor, the parathyroid hormone 2 receptor (pth2r), is widely expressed across the brain, we tested fish lacking the functional Pth2 peptide in several anxiety-related and social behavior paradigms. Here, we show that the propensity to react to sudden stimuli with an escape response was increased in pth2−/− zebrafish, consistent with an elevated anxiety level. While overall social preference for conspecifics was maintained in pth2−/− fish until the early juvenile stage, we found that both social preference and shoaling were altered later in development. The data presented suggest that the neuropeptide Pth2 modulates several conserved behaviors and may thus enable the animal to react appropriately in different social contexts. Lack of the neuropeptide pth2 increases startle responsiveness in zebrafish Social preference is decreased at the late juvenile stage in pth2 mutants Pth2 mutant fish form less cohesive shoals
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28
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López JM, Jiménez S, Morona R, Lozano D, Moreno N. Analysis of Islet-1, Nkx2.1, Pax6, and Orthopedia in the forebrain of the sturgeon Acipenser ruthenus identifies conserved prosomeric characteristics. J Comp Neurol 2021; 530:834-855. [PMID: 34547112 DOI: 10.1002/cne.25249] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 09/07/2021] [Accepted: 09/09/2021] [Indexed: 12/19/2022]
Abstract
The distribution patterns of a set of conserved brain developmental regulatory transcription factors were analyzed in the forebrain of the basal actinopterygian fish Acipenser ruthenus, consistent with the prosomeric model. In the telencephalon, the pallium was characterized by ventricular expression of Pax6. In the subpallium, the combined expression of Nkx2.1/Islet-1 (Isl1) allowed to propose ventral and dorsal areas, as the septo-pallidal (Nkx2.1/Isl1+) and striatal derivatives (Isl1+), respectively, and a dorsal portion of the striatal derivatives, ventricularly rich in Pax6 and devoid of Isl1 expression. Dispersed Orthopedia (Otp) cells were found in the supracommissural and posterior nuclei of the ventral telencephalon, related to the medial portion of the amygdaloid complex. The preoptic area was identified by the Nkx2.1/Isl1 expression. In the alar hypothalamus, an Otp-expressing territory, lacking Nkx2.1/Isl1, was identified as the paraventricular domain. The adjacent subparaventricular domain (Spa) was subdivided in a rostral territory expressing Nkx2.1 and an Isl1+ caudal one. In the basal hypothalamus, the tuberal region was defined by the Nkx2.1/Isl1 expression and a rostral Otp-expressing domain was identified. Moreover, the Otp/Nkx2.1 combination showed an additional zone lacking Isl1, tentatively identified as the mamillary area. In the diencephalon, both Pax6 and Isl1 defined the prethalamic domain, and within the basal prosomere 3, scattered Pax6- and Isl1-expressing cells were observed in the posterior tubercle. Finally, a small group of Pax6 cells was observed in the pretectal area. These results improve the understanding of the forebrain evolution and demonstrate that its basic bauplan is present very early in the vertebrate lineage.
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Affiliation(s)
- Jesús M López
- Department of Cell Biology, Faculty of Biology, Complutense University, Madrid, Spain
| | - Sara Jiménez
- Department of Cell Biology, Faculty of Biology, Complutense University, Madrid, Spain
| | - Ruth Morona
- Department of Cell Biology, Faculty of Biology, Complutense University, Madrid, Spain
| | - Daniel Lozano
- Department of Cell Biology, Faculty of Biology, Complutense University, Madrid, Spain
| | - Nerea Moreno
- Department of Cell Biology, Faculty of Biology, Complutense University, Madrid, Spain
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29
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Könemann S, Meyer S, Betz A, Županič A, Vom Berg C. Sub-Lethal Peak Exposure to Insecticides Triggers Olfaction-Mediated Avoidance in Zebrafish Larvae. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:11835-11847. [PMID: 34398619 DOI: 10.1021/acs.est.1c01792] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
In agricultural areas, insecticides inevitably reach water bodies via leaching or run-off. While designed to be neurotoxic to insects, insecticides have adverse effects on a multitude of organisms due to the high conservation of the nervous system among phyla. To estimate the ecological effects of insecticides, it is important to investigate their impact on non-target organisms such as fish. Using zebrafish as the model, we investigated how different classes of insecticides influence fish behavior and uncovered neuronal underpinnings of the associated behavioral changes, providing an unprecedented insight into the perception of these chemicals by fish. We observed that zebrafish larvae avoid diazinon and imidacloprid while showing no response to other insecticides with the same mode of action. Moreover, ablation of olfaction abolished the aversive responses, indicating that fish smelled the insecticides. Assessment of neuronal activity in 289 brain regions showed that hypothalamic areas involved in stress response were among the regions with the largest changes, indicating that the observed behavioral response resembles reactions to stimuli that threaten homeostasis, such as changes in water chemistry. Our results contribute to the understanding of the environmental impact of insecticide exposure and can help refine acute toxicity assessment.
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Affiliation(s)
- Sarah Könemann
- Department of Environmental Toxicology, Eawag, Überlandstrasse 133, 8600 Dübendorf, Switzerland
- École Polytechnique Fédérale de Lausanne, EPFL, Route Cantonale, 1015 Lausanne, Switzerland
| | - Stéphanie Meyer
- École Polytechnique Fédérale de Lausanne, EPFL, Route Cantonale, 1015 Lausanne, Switzerland
| | - Alexander Betz
- Department of Environmental Toxicology, Eawag, Überlandstrasse 133, 8600 Dübendorf, Switzerland
| | - Anže Županič
- Department of Environmental Toxicology, Eawag, Überlandstrasse 133, 8600 Dübendorf, Switzerland
| | - Colette Vom Berg
- Department of Environmental Toxicology, Eawag, Überlandstrasse 133, 8600 Dübendorf, Switzerland
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30
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Eachus H, Choi MK, Ryu S. The Effects of Early Life Stress on the Brain and Behaviour: Insights From Zebrafish Models. Front Cell Dev Biol 2021; 9:657591. [PMID: 34368117 PMCID: PMC8335398 DOI: 10.3389/fcell.2021.657591] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2021] [Accepted: 04/20/2021] [Indexed: 01/27/2023] Open
Abstract
The early life period represents a window of increased vulnerability to stress, during which exposure can lead to long-lasting effects on brain structure and function. This stress-induced developmental programming may contribute to the behavioural changes observed in mental illness. In recent decades, rodent studies have significantly advanced our understanding of how early life stress (ELS) affects brain development and behaviour. These studies reveal that ELS has long-term consequences on the brain such as impairment of adult hippocampal neurogenesis, altering learning and memory. Despite such advances, several key questions remain inadequately answered, including a comprehensive overview of brain regions and molecular pathways that are altered by ELS and how ELS-induced molecular changes ultimately lead to behavioural changes in adulthood. The zebrafish represents a novel ELS model, with the potential to contribute to answering some of these questions. The zebrafish offers some important advantages such as the ability to non-invasively modulate stress hormone levels in a whole animal and to visualise whole brain activity in freely behaving animals. This review discusses the current status of the zebrafish ELS field and its potential as a new ELS model.
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Affiliation(s)
- Helen Eachus
- Living Systems Institute and College of Medicine and Health, University of Exeter, Exeter, United Kingdom
| | - Min-Kyeung Choi
- Living Systems Institute and College of Medicine and Health, University of Exeter, Exeter, United Kingdom
| | - Soojin Ryu
- Living Systems Institute and College of Medicine and Health, University of Exeter, Exeter, United Kingdom.,Institute of Human Genetics, University Medical Center, Johannes Gutenberg University Mainz, Mainz, Germany
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31
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Jékely G. The chemical brain hypothesis for the origin of nervous systems. Philos Trans R Soc Lond B Biol Sci 2021; 376:20190761. [PMID: 33550946 PMCID: PMC7935135 DOI: 10.1098/rstb.2019.0761] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/25/2020] [Indexed: 12/13/2022] Open
Abstract
In nervous systems, there are two main modes of transmission for the propagation of activity between cells. Synaptic transmission relies on close contact at chemical or electrical synapses while volume transmission is mediated by diffusible chemical signals and does not require direct contact. It is possible to wire complex neuronal networks by both chemical and synaptic transmission. Both types of networks are ubiquitous in nervous systems, leading to the question which of the two appeared first in evolution. This paper explores a scenario where chemically organized cellular networks appeared before synapses in evolution, a possibility supported by the presence of complex peptidergic signalling in all animals except sponges. Small peptides are ideally suited to link up cells into chemical networks. They have unlimited diversity, high diffusivity and high copy numbers derived from repetitive precursors. But chemical signalling is diffusion limited and becomes inefficient in larger bodies. To overcome this, peptidergic cells may have developed projections and formed synaptically connected networks tiling body surfaces and displaying synchronized activity with pulsatile peptide release. The advent of circulatory systems and neurohemal organs further reduced the constraint imposed on chemical signalling by diffusion. This could have contributed to the explosive radiation of peptidergic signalling systems in stem bilaterians. Neurosecretory centres in extant nervous systems are still predominantly chemically wired and coexist with the synaptic brain. This article is part of the theme issue 'Basal cognition: multicellularity, neurons and the cognitive lens'.
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Affiliation(s)
- Gáspár Jékely
- Living Systems Institute, University of Exeter, Stocker Road, Exeter EX4 4QD, UK
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32
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Nishiike Y, Miyazoe D, Togawa R, Yokoyama K, Nakasone K, Miyata M, Kikuchi Y, Kamei Y, Todo T, Ishikawa-Fujiwara T, Ohno K, Usami T, Nagahama Y, Okubo K. Estrogen receptor 2b is the major determinant of sex-typical mating behavior and sexual preference in medaka. Curr Biol 2021; 31:1699-1710.e6. [PMID: 33639108 DOI: 10.1016/j.cub.2021.01.089] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Revised: 12/07/2020] [Accepted: 01/25/2021] [Indexed: 01/02/2023]
Abstract
Male and female animals typically display innate sex-specific mating behaviors, which, in vertebrates, are highly dependent on sex steroid signaling. While estradiol-17β (E2) signaling through estrogen receptor 2 (ESR2) serves to defeminize male mating behavior in rodents, the available evidence suggests that E2 signaling is not required in teleosts for either male or female mating behavior. Here, we report that female medaka deficient for Esr2b, a teleost ortholog of ESR2, are not receptive to males but rather court females, despite retaining normal ovarian function with an unaltered sex steroid milieu. Thus, contrary to both prevailing views in rodents and teleosts, E2/Esr2b signaling in the brain plays a decisive role in feminization and demasculinization of female mating behavior and sexual preference in medaka. Further behavioral testing showed that mutual antagonism between E2/Esr2b signaling and androgen receptor-mediated androgen signaling in adulthood induces and actively maintains sex-typical mating behaviors and preference. Our results also revealed that the female-biased sexual dimorphism in esr2b expression in the telencephalic and preoptic nuclei implicated in mating behavior can be reversed between males and females by altering the sex steroid milieu in adulthood, likely via mechanisms involving direct E2-induced transcriptional activation. In addition, Npba, a neuropeptide mediating female sexual receptivity, was found to act downstream of E2/Esr2b signaling in these brain nuclei. Collectively, these functional and regulatory mechanisms of E2/Esr2b signaling presumably underpin the neural mechanism for induction, maintenance, and reversal of sex-typical mating behaviors and sexual preference in teleosts, at least in medaka.
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Affiliation(s)
- Yuji Nishiike
- Department of Aquatic Bioscience, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo, Tokyo 113-8657, Japan
| | - Daichi Miyazoe
- Department of Aquatic Bioscience, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo, Tokyo 113-8657, Japan
| | - Rie Togawa
- Department of Aquatic Bioscience, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo, Tokyo 113-8657, Japan
| | - Keiko Yokoyama
- Department of Aquatic Bioscience, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo, Tokyo 113-8657, Japan
| | - Kiyoshi Nakasone
- Department of Aquatic Bioscience, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo, Tokyo 113-8657, Japan
| | - Masayoshi Miyata
- Department of Aquatic Bioscience, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo, Tokyo 113-8657, Japan
| | - Yukiko Kikuchi
- Department of Aquatic Bioscience, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo, Tokyo 113-8657, Japan
| | - Yasuhiro Kamei
- Spectrography and Bioimaging Facility, National Institute for Basic Biology, Okazaki, Aichi 444-8585, Japan
| | - Takeshi Todo
- Department of Genome Biology, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Tomoko Ishikawa-Fujiwara
- Department of Genome Biology, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Kaoru Ohno
- Division of Reproductive Biology, National Institute for Basic Biology, Okazaki, Aichi 444-8585, Japan
| | - Takeshi Usami
- Division of Reproductive Biology, National Institute for Basic Biology, Okazaki, Aichi 444-8585, Japan
| | - Yoshitaka Nagahama
- Division of Reproductive Biology, National Institute for Basic Biology, Okazaki, Aichi 444-8585, Japan
| | - Kataaki Okubo
- Department of Aquatic Bioscience, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo, Tokyo 113-8657, Japan.
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Venincasa MJ, Randlett O, Sumathipala SH, Bindernagel R, Stark MJ, Yan Q, Sloan SA, Buglo E, Meng QC, Engert F, Züchner S, Kelz MB, Syed S, Dallman JE. Elevated preoptic brain activity in zebrafish glial glycine transporter mutants is linked to lethargy-like behaviors and delayed emergence from anesthesia. Sci Rep 2021; 11:3148. [PMID: 33542258 PMCID: PMC7862283 DOI: 10.1038/s41598-021-82342-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Accepted: 01/19/2021] [Indexed: 11/17/2022] Open
Abstract
Delayed emergence from anesthesia was previously reported in a case study of a child with Glycine Encephalopathy. To investigate the neural basis of this delayed emergence, we developed a zebrafish glial glycine transporter (glyt1 - / -) mutant model. We compared locomotor behaviors; dose-response curves for tricaine, ketamine, and 2,6-diisopropylphenol (propofol); time to emergence from these anesthetics; and time to emergence from propofol after craniotomy in glyt1-/- mutants and their siblings. To identify differentially active brain regions in glyt1-/- mutants, we used pERK immunohistochemistry as a proxy for brain-wide neuronal activity. We show that glyt1-/- mutants initiated normal bouts of movement less frequently indicating lethargy-like behaviors. Despite similar anesthesia dose-response curves, glyt1-/- mutants took over twice as long as their siblings to emerge from ketamine or propofol, mimicking findings from the human case study. Reducing glycine levels rescued timely emergence in glyt1-/- mutants, pointing to a causal role for elevated glycine. Brain-wide pERK staining showed elevated activity in hypnotic brain regions in glyt1-/- mutants under baseline conditions and a delay in sensorimotor integration during emergence from anesthesia. Our study links elevated activity in preoptic brain regions and reduced sensorimotor integration to lethargy-like behaviors and delayed emergence from propofol in glyt1-/- mutants.
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Affiliation(s)
- Michael J Venincasa
- Department of Biology, University of Miami, 1301 Memorial Drive, Coral Gables, FL, 33146, USA
| | - Owen Randlett
- Department of Molecular and Cellular Biology, Harvard University, Cambridge, MA, 02138, USA
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS UMR 5310, INSERM U 1217, Institut NeuroMyoGène, 69008, Lyon, France
| | - Sureni H Sumathipala
- Department of Biology, University of Miami, 1301 Memorial Drive, Coral Gables, FL, 33146, USA
| | - Richard Bindernagel
- Department of Biology, University of Miami, 1301 Memorial Drive, Coral Gables, FL, 33146, USA
| | - Matthew J Stark
- Department of Biology, University of Miami, 1301 Memorial Drive, Coral Gables, FL, 33146, USA
| | - Qing Yan
- Department of Biology, University of Miami, 1301 Memorial Drive, Coral Gables, FL, 33146, USA
| | - Steven A Sloan
- Department of Biology, University of Miami, 1301 Memorial Drive, Coral Gables, FL, 33146, USA
- Department of Human Genetics, Emory University School of Medicine, Atlanta, GA, 30322, USA
| | - Elena Buglo
- Department of Biology, University of Miami, 1301 Memorial Drive, Coral Gables, FL, 33146, USA
- John P. Hussman Institute for Human Genomics, University of Miami, Miami, FL, 33101, USA
- Dr. John T. MacDonald Foundation Department of Human Genetics, University of Miami, Miami, FL, 33136, USA
| | - Qing Cheng Meng
- Departments of Anesthesiology and Critical Care, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, 19104, USA
| | - Florian Engert
- Department of Molecular and Cellular Biology, Harvard University, Cambridge, MA, 02138, USA
| | - Stephan Züchner
- John P. Hussman Institute for Human Genomics, University of Miami, Miami, FL, 33101, USA
- Dr. John T. MacDonald Foundation Department of Human Genetics, University of Miami, Miami, FL, 33136, USA
| | - Max B Kelz
- Departments of Anesthesiology and Critical Care, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, 19104, USA
- Pharmacology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, 19104, USA
- Neuroscience, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, 19104, USA
- Institute for Translational Medicine and Therapeutics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, 19104, USA
| | - Sheyum Syed
- Department of Physics, University of Miami, Coral Gables, FL, 33146, USA
| | - Julia E Dallman
- Department of Biology, University of Miami, 1301 Memorial Drive, Coral Gables, FL, 33146, USA.
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Gerlach G, Wullimann MF. Neural pathways of olfactory kin imprinting and kin recognition in zebrafish. Cell Tissue Res 2021; 383:273-287. [PMID: 33515290 PMCID: PMC7873017 DOI: 10.1007/s00441-020-03378-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Accepted: 12/03/2020] [Indexed: 12/14/2022]
Abstract
Teleost fish exhibit extraordinary cognitive skills that are comparable to those of mammals and birds. Kin recognition based on olfactory and visual imprinting requires neuronal circuits that were assumed to be necessarily dependent on the interaction of mammalian amygdala, hippocampus, and isocortex, the latter being a structure that teleost fish are lacking. We show that teleosts—beyond having a hippocampus and pallial amygdala homolog—also have subpallial amygdalar structures. In particular, we identify the medial amygdala and neural olfactory central circuits related to kin imprinting and kin recognition corresponding to an accessory olfactory system despite the absence of a separate vomeronasal organ.
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Affiliation(s)
- Gabriele Gerlach
- Institute of Biology and Environmental Sciences, Carl-von-Ossietzky University, 26129, Oldenburg, Germany.,Helmholtz Institute for Functional Marine Biodiversity Oldenburg (HIFMB), 26129, Oldenburg, Germany.,Centre of Excellence for Coral Reef Studies and School of Marine and Tropical Biology, James Cook University, QLD, 4811, Townsville, Australia
| | - Mario F Wullimann
- Graduate School of Systemic Neurosciences & Department Biology II, Ludwig-Maximilians-Universität Munich, 82152, Planegg-Martinsried, Germany. .,Max-Planck-Institute for Neurobiology, 82152, Planegg-Martinsried, Germany.
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35
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Morales L, Castro-Robles B, Abellán A, Desfilis E, Medina L. A novel telencephalon-opto-hypothalamic morphogenetic domain coexpressing Foxg1 and Otp produces most of the glutamatergic neurons of the medial extended amygdala. J Comp Neurol 2021; 529:2418-2449. [PMID: 33386618 DOI: 10.1002/cne.25103] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Revised: 12/28/2020] [Accepted: 12/29/2020] [Indexed: 12/14/2022]
Abstract
Deficits in social cognition and behavior are a hallmark of many psychiatric disorders. The medial extended amygdala, including the medial amygdala and the medial bed nucleus of the stria terminalis, is a key component of functional networks involved in sociality. However, this nuclear complex is highly heterogeneous and contains numerous GABAergic and glutamatergic neuron subpopulations. Deciphering the connections of different neurons is essential in order to understand how this structure regulates different aspects of sociality, and it is necessary to evaluate their differential implication in distinct mental disorders. Developmental studies in different vertebrates are offering new venues to understand neuronal diversity of the medial extended amygdala and are helping to establish a relation between the embryonic origin and molecular signature of distinct neurons with the functional subcircuits in which they are engaged. These studies have provided many details on the distinct GABAergic neurons of the medial extended amygdala, but information on the glutamatergic neurons is still scarce. Using an Otp-eGFP transgenic mouse and multiple fluorescent labeling, we show that most glutamatergic neurons of the medial extended amygdala originate in a distinct telencephalon-opto-hypothalamic embryonic domain (TOH), located at the transition between telencephalon and hypothalamus, which produces Otp-lineage neurons expressing the telencephalic marker Foxg1 but not Nkx2.1 during development. These glutamatergic cells include a subpopulation of projection neurons of the medial amygdala, which activation has been previously shown to promote autistic-like behavior. Our data open new venues for studying the implication of this neuron subtype in neurodevelopmental disorders producing social deficits.
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Affiliation(s)
- Lorena Morales
- Laboratory of Evolutionary and Developmental Neurobiology, Lleida's Institute for Biomedical Research-Dr. Pifarré Foundation (IRBLleida), Catalonia, Spain
| | - Beatriz Castro-Robles
- Laboratory of Cerebrovascular, Neurodegenerative and Neuro-oncology Diseases, Research Unit, Complejo Hospitalario Universitario de Albacete, Castilla-La Mancha, Spain
| | - Antonio Abellán
- Laboratory of Evolutionary and Developmental Neurobiology, Lleida's Institute for Biomedical Research-Dr. Pifarré Foundation (IRBLleida), Catalonia, Spain
| | - Ester Desfilis
- Laboratory of Evolutionary and Developmental Neurobiology, Lleida's Institute for Biomedical Research-Dr. Pifarré Foundation (IRBLleida), Catalonia, Spain
| | - Loreta Medina
- Laboratory of Evolutionary and Developmental Neurobiology, Lleida's Institute for Biomedical Research-Dr. Pifarré Foundation (IRBLleida), Catalonia, Spain
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36
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The stress - Reproductive axis in fish: The involvement of functional neuroanatomical systems in the brain. J Chem Neuroanat 2020; 112:101904. [PMID: 33278567 DOI: 10.1016/j.jchemneu.2020.101904] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2020] [Revised: 10/23/2020] [Accepted: 11/30/2020] [Indexed: 01/26/2023]
Abstract
The neuroendocrine-stress axis of nonmammalian species is evolutionarily conserved, which makes them useful to serve as important model systems for elucidating the function of the vertebrate stress response. The involvement of hypothalamo-pituitary-adrenal (HPA) axis hormones in regulation of stress and reproduction is well described in different vertebrates. However, the stress response is a complex process, which appears to be controlled by a number of neurochemicals in association with hypothalamo-pituitary-interrenal (HPI) axis or independent of HPI axis in fish. In recent years, the participation of neurohormones other than HPI axis in regulation of stress and reproduction is gaining more attention. This review mainly focuses on the involvement of functional neuroanatomical systems such as the catecholaminergic neurotransmitter dopamine (DA) and opioid peptides in regulation of the stress-reproductive axis in fish. Occurrences of DA and opioid peptides like β-endorphin, enkephalins, dynorphin, and endomorphins have been demonstrated in fish brain, and diverse roles such as pain modulation, social behaviour and reproduction are implicated for these hormones. Neuroanatomical studies using retrograde tracing, immunohistochemical staining and lesion methods have demonstrated that the neurons originating in the preoptic region and the nucleus lateralis tuberis directly innervate the pituitary gland and, therefore, the hypophysiotrophic role of these hormones. In addition, heightened synthetic and secretory activity of the opioidergic and the dopaminergic neurons in hypothalamic areas of the brain during stress exposure suggest potentially intricate relationship with the stress-reproductive axis in fish. Current evidence in early vertebrates like fish provides a novel insight into the underlying neuroendocrine mechanisms as additional pathways along the stress-reproductive axis that seem to be conserved during the course of evolution.
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Anneser L, Alcantara IC, Gemmer A, Mirkes K, Ryu S, Schuman EM. The neuropeptide Pth2 dynamically senses others via mechanosensation. Nature 2020; 588:653-657. [PMID: 33268890 DOI: 10.1038/s41586-020-2988-z] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Accepted: 09/15/2020] [Indexed: 12/12/2022]
Abstract
Species that depend on membership in social groups for survival exhibit changes in neuronal gene expression and behaviour when they face restricted social interactions or isolation1-3. Here we show that, across the lifespan of zebrafish (Danio rerio), social isolation specifically decreased the level of transcription of pth2, the gene that encodes the vertebrate-specific neuropeptide Pth2. However, 30 minutes of exposure to conspecifics was sufficient to initiate a significant rescue of pth2 transcript levels in previously isolated zebrafish. Transcription of pth2 exhibited bidirectional dynamics; following the acute isolation of socially reared fish, a rapid reduction in the levels of pth2 was observed. The expression of pth2 tracked not only the presence of other fish but also the density of the group. The sensory modality that controls the expression of pth2 was neither visual nor chemosensory in origin but instead was mechanical, induced by the movements of neighbouring fish. Chemical ablation of the mechanosensitive neuromast cells within the lateral line of fish prevented the rescue of pth2 levels that was induced by the social environment. In addition, mechanical perturbation of the water at frequencies similar to the movements of the zebrafish tail was sufficient to rescue the levels of pth2 in previously isolated fish. These data indicate a previously underappreciated role for the relatively unexplored neuropeptide Pth2 in both tracking and responding to the population density of the social environment of an animal.
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Affiliation(s)
- Lukas Anneser
- Max Planck Institute for Brain Research, Frankfurt, Germany
| | - Ivan C Alcantara
- Max Planck Institute for Brain Research, Frankfurt, Germany.,Brown University, Providence, RI, USA
| | - Anja Gemmer
- Max Planck Institute for Brain Research, Frankfurt, Germany
| | | | - Soojin Ryu
- Johannes Gutenberg University Medical Center, Mainz, Germany.,Living Systems Institute, College of Medicine and Health, University of Exeter, Exeter, UK
| | - Erin M Schuman
- Max Planck Institute for Brain Research, Frankfurt, Germany.
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38
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Beriotto AC, Di Yorio MP, Pérez Sirkin DI, Toledo-Solis FJ, Peña-Marín ES, Álvarez-González CA, Tsutsui K, Vissio PG. Gonadotropin-inhibitory hormone (GnIH) distribution in the brain of the ancient fish Atractosteus tropicus (Holostei, Lepisosteiformes). Gen Comp Endocrinol 2020; 299:113623. [PMID: 32976836 DOI: 10.1016/j.ygcen.2020.113623] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 08/14/2020] [Accepted: 09/04/2020] [Indexed: 12/31/2022]
Abstract
The Holostei group occupies a critical phylogenetic position as the sister group of the Teleostei. However, little is known about holostean pituitary anatomy or brain distribution of important reproductive neuropeptides, such as the gonadotropin-inhibitory hormone (GnIH). Thus, the present study set out to characterize the structure of the pituitary and to localize GnIH-immunoreactive cells in the brain of Atractosteus tropicus from the viewpoint of comparative neuroanatomy. Juveniles of both sexes were processed for general histology and immunohistochemistry. Based on the differences in cell organization, morphology, and staining properties, the neurohypophysis and three regions in the adenohypophysis were identified: the rostral and proximal pars distalis (PPD) and the pars intermedia. This last region was found to be innervated by the neurohypophysis. This organization, together with the presence of a saccus vasculosus, resembles the general teleost pituitary organization. A vast number of blood vessels were also recognized between the infundibulum floor of the hypothalamus and the PPD, evidencing the characteristic presence of a median eminence and a portal system. However, this well-developed pituitary portal system resembles that of tetrapods. As regards the immunohistochemical localization of GnIH, we found four GnIH-immunoreactive (GnIH-ir) populations in three hypothalamic nuclei (suprachiasmatic, retrotuberal, and tuberal nuclei) and one in the diencephalon (prethalamic nucleus), as well as a few scattered neurons throughout the olfactory bulbs, the telencephalon, and the intersection between them. GnIH-ir fibers showed a widespread distribution over almost all brain regions, suggesting that GnIH function is not restricted to reproduction only. In conclusion, the present study describes, for the first time, the pituitary of A. tropicus and the neuroanatomical localization of GnIH in a holostean fish that exhibits a similar distribution pattern to that of teleosts and other vertebrates, suggesting a high degree of phylogenetic conservation of this system.
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Affiliation(s)
- Agustina C Beriotto
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Biodiversidad y Biología Experimental. Buenos Aires, Argentina; CONICET - Universidad de Buenos Aires. Instituto de Biodiversidad y Biología Experimental y Aplicada (IBBEA) - CONICET. Buenos Aires, Argentina
| | - María P Di Yorio
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Biodiversidad y Biología Experimental. Buenos Aires, Argentina; CONICET - Universidad de Buenos Aires. Instituto de Biodiversidad y Biología Experimental y Aplicada (IBBEA) - CONICET. Buenos Aires, Argentina
| | - Daniela I Pérez Sirkin
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Biodiversidad y Biología Experimental. Buenos Aires, Argentina; CONICET - Universidad de Buenos Aires. Instituto de Biodiversidad y Biología Experimental y Aplicada (IBBEA) - CONICET. Buenos Aires, Argentina
| | - Francisco J Toledo-Solis
- Laboratorio de Acuicultura Tropical, División Académica de Ciencias Biológicas, Universidad Juárez Autónoma de Tabasco. Villahermosa, Mexico
| | - Emyr S Peña-Marín
- Laboratorio de Acuicultura Tropical, División Académica de Ciencias Biológicas, Universidad Juárez Autónoma de Tabasco. Villahermosa, Mexico
| | - Carlos A Álvarez-González
- Laboratorio de Acuicultura Tropical, División Académica de Ciencias Biológicas, Universidad Juárez Autónoma de Tabasco. Villahermosa, Mexico
| | - Kazuyoshi Tsutsui
- Department of Biology and Center for Medical Life Science, Waseda University. Tokyo, Japan
| | - Paula G Vissio
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Biodiversidad y Biología Experimental. Buenos Aires, Argentina; CONICET - Universidad de Buenos Aires. Instituto de Biodiversidad y Biología Experimental y Aplicada (IBBEA) - CONICET. Buenos Aires, Argentina.
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39
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Messina A, Boiti A, Vallortigara G. Asymmetric distribution of pallial‐expressed genes in zebrafish (
Danio rerio
). Eur J Neurosci 2020; 53:362-375. [DOI: 10.1111/ejn.14914] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Revised: 07/10/2020] [Accepted: 07/11/2020] [Indexed: 12/15/2022]
Affiliation(s)
- Andrea Messina
- Center for Mind/Brain Sciences University of Trento Rovereto Italy
| | - Alessandra Boiti
- Center for Mind/Brain Sciences University of Trento Rovereto Italy
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40
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Godino-Gimeno A, Sánchez E, Guillot R, Rocha A, Angotzi AR, Leal E, Rotllant J, Cerdá-Reverter JM. Growth Performance After Agouti-Signaling Protein 1 ( Asip1) Overexpression in Transgenic Zebrafish. Zebrafish 2020; 17:373-381. [PMID: 33112719 DOI: 10.1089/zeb.2020.1932] [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] [Indexed: 01/16/2023] Open
Abstract
The melanocortin system is a key structure in the regulation of energy balance. Overexpression of inverse agonists, agouti-signaling protein (ASIP), and agouti-related protein (AGRP) results in increased food intake, linear growth, and body weight. ASIP regulates dorsal-ventral pigment polarity through melanocortin 1 receptor (MC1R) and overexpression induces obesity in mice by binding to central MC4R. Asip1 overexpression in transgenic zebrafish (asip1-Tg) enhances growth, yet experiments show fish overexpressing Asip1 do not develop obesity even under severe feeding regimes. Asip1-Tg fish do not need to eat more to grow larger and faster; thus, increased food efficiency can be observed. In addition, asip1-Tg fish reared at high density are able to grow far more than wild-type (WT) fish reared at low density, although asip1-Tg fish seem to be more sensitive to crowding stress than WT fish, thus making the melanocortin system a target for sustainable aquaculture, especially as the U.S. Food and Drug Association has recently approved transgenic fish trading.
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Affiliation(s)
- Alejandra Godino-Gimeno
- Department of Fish Physiology and Biotechnology, Instituto de Acuicultura de Torre de la Sal, Consejo Superior de Investigaciones Científicas (IATS-CSIC), Castellon, Spain
| | - Elisa Sánchez
- Department of Fish Physiology and Biotechnology, Instituto de Acuicultura de Torre de la Sal, Consejo Superior de Investigaciones Científicas (IATS-CSIC), Castellon, Spain
| | - Raúl Guillot
- Department of Fish Physiology and Biotechnology, Instituto de Acuicultura de Torre de la Sal, Consejo Superior de Investigaciones Científicas (IATS-CSIC), Castellon, Spain
| | - Ana Rocha
- Centro Interdisciplinar de Investigação Marinha e Ambiental (CIIMAR), Matosinhos, Portugal.,MARE - Marine and Environmental Sciences Centre, ESTM, Instituto Politécnico de Leiria, Peniche, Portugal
| | - Anna Rita Angotzi
- Department of Fish Physiology and Biotechnology, Instituto de Acuicultura de Torre de la Sal, Consejo Superior de Investigaciones Científicas (IATS-CSIC), Castellon, Spain
| | - Esther Leal
- Department of Fish Physiology and Biotechnology, Instituto de Acuicultura de Torre de la Sal, Consejo Superior de Investigaciones Científicas (IATS-CSIC), Castellon, Spain
| | - Josep Rotllant
- Department of Biotechnology and Aquaculture, Instituto de Investigaciones Marinas, IIM-CSIC, Vigo, Spain
| | - José Miguel Cerdá-Reverter
- Department of Fish Physiology and Biotechnology, Instituto de Acuicultura de Torre de la Sal, Consejo Superior de Investigaciones Científicas (IATS-CSIC), Castellon, Spain
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41
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Lovett-Barron M, Chen R, Bradbury S, Andalman AS, Wagle M, Guo S, Deisseroth K. Multiple convergent hypothalamus-brainstem circuits drive defensive behavior. Nat Neurosci 2020; 23:959-967. [PMID: 32572237 PMCID: PMC7687349 DOI: 10.1038/s41593-020-0655-1] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Accepted: 05/13/2020] [Indexed: 12/17/2022]
Abstract
The hypothalamus is composed of many neuropeptidergic cell populations and directs multiple survival behaviors, including defensive responses to threats. However, the relationship between the peptidergic identity of neurons and their roles in behavior remains unclear. Here, we address this issue by studying the function of multiple neuronal populations in the zebrafish hypothalamus during defensive responses to a variety of homeostatic threats. Cellular registration of large-scale neural activity imaging to multiplexed in situ gene expression revealed that neuronal populations encoding behavioral features encompass multiple overlapping sets of neuropeptidergic cell classes. Manipulations of different cell populations showed that multiple sets of peptidergic neurons play similar behavioral roles in this fast-timescale behavior through glutamate co-release and convergent output to spinal-projecting premotor neurons in the brainstem. Our findings demonstrate that homeostatic threats recruit neurons across multiple hypothalamic cell populations, which cooperatively drive robust defensive behaviors.
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Affiliation(s)
| | - Ritchie Chen
- Department of Bioengineering, Stanford University, Stanford, CA, USA
| | - Susanna Bradbury
- Department of Bioengineering, Stanford University, Stanford, CA, USA
| | - Aaron S Andalman
- Department of Bioengineering, Stanford University, Stanford, CA, USA
| | - Mahendra Wagle
- Department of Bioengineering and Therapeutic Sciences, Programs in Human Genetics and Biological Sciences, University of California, San Francisco, San Francisco, CA, USA
| | - Su Guo
- Department of Bioengineering and Therapeutic Sciences, Programs in Human Genetics and Biological Sciences, University of California, San Francisco, San Francisco, CA, USA
| | - Karl Deisseroth
- Department of Bioengineering, Stanford University, Stanford, CA, USA.
- Department of Psychiatry & Behavioral Sciences, Stanford University, Stanford, CA, USA.
- Howard Hughes Medical Institute, Stanford University, Stanford, CA, USA.
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42
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Gusso D, Reolon GK, Gonzalez JB, Altenhofen S, Kist LW, Bogo MR, Bonan CD. Pyriproxyfen Exposure Impairs Cognitive Parameters and Alters Cortisol Levels in Zebrafish. Front Behav Neurosci 2020; 14:103. [PMID: 32625070 PMCID: PMC7313640 DOI: 10.3389/fnbeh.2020.00103] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Accepted: 05/25/2020] [Indexed: 12/27/2022] Open
Abstract
Pyriproxyfen is one of the most used larvicides and insecticides; it acts as an analog of juvenile insect hormone (a growth regulator). It is highly toxic during all stages of mosquito development, suppresses metamorphosis, and interferes in insect reproduction and proliferation. Pyriproxyfen and its main metabolite have been shown to affect brain development in rodents. This compound is employed mainly to eliminate outbreaks of the genus Aedes, even in potable water. Despite the increasing number of toxicological studies about larvicides and insecticides-with an indication of continuous use-there have been few studies about the effects of pyriproxyfen in non-target species such as fish. This study evaluated the effects of pyriproxyfen on behavioral, cognitive, and endocrine parameters in zebrafish. We exposed adult zebrafish to different pyriproxyfen (Pestanal®) concentrations (0.125, 0.675, and 1.75 mg/l) for 96 h. We analyzed behavioral parameters, memory, cortisol levels, and gene expression of glucocorticoid receptor (gr) and corticotrophin-releasing factor (crf) after pyriproxyfen exposure. This exposure did not alter locomotion (distance or mean speed), anxiety-like behavior (latency to enter to the top zone of the tank or time in the top zone of the tank), and social or aggressive behavior. However, there was impaired inhibitory avoidance memory at all tested pyriproxyfen concentrations. Cortisol levels were reduced in exposed groups when compared to control or vehicle. However, gr and crf gene expression in pyriproxyfen-treated animals were unaltered when compared to control or vehicle groups. Taken together, these findings indicate that pyriproxyfen may induce cognitive impairment and altered cortisol levels in zebrafish, a non-target species.
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Affiliation(s)
- Darlan Gusso
- Programa de Pos-Graduacao em Biologia Celular e Molecular, Escola de Ciencias da Saude e da Vida, Pontificia Universidade Catolica do Rio Grande do Sul, Porto Alegre, Brazil
| | - Gustavo Kellermann Reolon
- Programa de Pos-Graduacao em Biologia Celular e Molecular, Escola de Ciencias da Saude e da Vida, Pontificia Universidade Catolica do Rio Grande do Sul, Porto Alegre, Brazil
| | - Jonas Brum Gonzalez
- Programa de Pos-Graduacao em Biologia Celular e Molecular, Escola de Ciencias da Saude e da Vida, Pontificia Universidade Catolica do Rio Grande do Sul, Porto Alegre, Brazil
| | - Stefani Altenhofen
- Programa de Pos-Graduacao em Medicina e Ciencias da Saude, Escola de Medicina, Pontificia Universidade Catolica do Rio Grande do Sul, Porto Alegre, Brazil
| | - Luiza Wilges Kist
- Programa de Pos-Graduacao em Biologia Celular e Molecular, Escola de Ciencias da Saude e da Vida, Pontificia Universidade Catolica do Rio Grande do Sul, Porto Alegre, Brazil
| | - Mauricio Reis Bogo
- Programa de Pos-Graduacao em Biologia Celular e Molecular, Escola de Ciencias da Saude e da Vida, Pontificia Universidade Catolica do Rio Grande do Sul, Porto Alegre, Brazil
- Programa de Pos-Graduacao em Medicina e Ciencias da Saude, Escola de Medicina, Pontificia Universidade Catolica do Rio Grande do Sul, Porto Alegre, Brazil
| | - Carla Denise Bonan
- Programa de Pos-Graduacao em Biologia Celular e Molecular, Escola de Ciencias da Saude e da Vida, Pontificia Universidade Catolica do Rio Grande do Sul, Porto Alegre, Brazil
- Programa de Pos-Graduacao em Medicina e Ciencias da Saude, Escola de Medicina, Pontificia Universidade Catolica do Rio Grande do Sul, Porto Alegre, Brazil
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Schredelseker T, Veit F, Dorsky RI, Driever W. Bsx Is Essential for Differentiation of Multiple Neuromodulatory Cell Populations in the Secondary Prosencephalon. Front Neurosci 2020; 14:525. [PMID: 32581684 PMCID: PMC7290237 DOI: 10.3389/fnins.2020.00525] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Accepted: 04/28/2020] [Indexed: 01/17/2023] Open
Abstract
The hypothalamus is characterized by great neuronal diversity, with many neuropeptides and other neuromodulators being expressed within its multiple anatomical domains. The regulatory networks directing hypothalamic development have been studied in detail, but, for many neuron types, control of differentiation is still not understood. The highly conserved Brain-specific homeobox (Bsx) transcription factor has previously been described in regulating Agrp and Npy expression in the hypothalamic arcuate nucleus (ARC) in mice. While Bsx is expressed in many more subregions of both tuberal and mamillary hypothalamus, the functions therein are not known. Using genetic analyses in zebrafish, we show that most bsx expression domains are dependent on Nkx2.1 and Nkx2.4 homeodomain transcription factors, while a subset depends on Otp. We show that the anatomical pattern of the ventral forebrain appears normal in bsx mutants, but that Bsx is necessary for the expression of many neuropeptide encoding genes, including agrp, penka, vip, trh, npb, and nts, in distinct hypothalamic anatomical domains. We also found Bsx to be critical for normal expression of two Crh family members, crhb and uts1, as well as crhbp, in the hypothalamus and the telencephalic septal region. Furthermore, we demonstrate a crucial role for Bsx in serotonergic, histaminergic and nitrergic neuron development in the hypothalamus. We conclude that Bsx is critical for the terminal differentiation of multiple neuromodulatory cell types in the forebrain.
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Affiliation(s)
- Theresa Schredelseker
- Developmental Biology, Institute Biology 1, Faculty of Biology, Albert Ludwig University of Freiburg, Freiburg im Breisgau, Germany.,BIOSS Centre for Biological Signalling Studies, University of Freiburg, Freiburg im Breisgau, Germany.,CIBSS - Centre for Integrative Biological Signalling Studies, University of Freiburg, Freiburg im Breisgau, Germany
| | - Florian Veit
- Developmental Biology, Institute Biology 1, Faculty of Biology, Albert Ludwig University of Freiburg, Freiburg im Breisgau, Germany
| | - Richard I Dorsky
- Department of Neurobiology & Anatomy, University of Utah, Salt Lake City, UT, United States
| | - Wolfgang Driever
- Developmental Biology, Institute Biology 1, Faculty of Biology, Albert Ludwig University of Freiburg, Freiburg im Breisgau, Germany.,BIOSS Centre for Biological Signalling Studies, University of Freiburg, Freiburg im Breisgau, Germany.,CIBSS - Centre for Integrative Biological Signalling Studies, University of Freiburg, Freiburg im Breisgau, Germany
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Assad N, Luz WL, Santos-Silva M, Carvalho T, Moraes S, Picanço-Diniz DLW, Bahia CP, Oliveira Batista EDJ, da Conceição Passos A, Oliveira KRHM, Herculano AM. Acute Restraint Stress Evokes Anxiety-Like Behavior Mediated by Telencephalic Inactivation and GabAergic Dysfunction in Zebrafish Brains. Sci Rep 2020; 10:5551. [PMID: 32218457 PMCID: PMC7099036 DOI: 10.1038/s41598-020-62077-w] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Accepted: 02/25/2020] [Indexed: 12/21/2022] Open
Abstract
Acute stress is an important factor in the development of anxiety disorders. Zebrafish are an organism model widely used by studies that aim to describe the events in the brain that control stress-elicited anxiety. The goal of the current study was to evaluate the pattern of cell activation in the telencephalon of adult zebrafish and the role of the GABAergic system on the modulation of anxiety-like behavior evoked by acute restraint stress. Zebrafish that underwent acute restraint stress presented decreased expression of the c-fos protein in their telencephalon as well as a significant decrease in GABA release. The data also supports that decreased GABA levels in zebrafish brains have diminished the activation of GABAA receptors eliciting anxiety-like behavior. Taken together these findings have helped clarify a neurochemical pathway controlling anxiety-like behavior evoked by acute stress in zebrafish while also opening the possibility of new perspective opportunities to use zebrafish as an animal model to test anxyolitic drugs that target the GABAergic system.
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Affiliation(s)
- Nadyme Assad
- Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, Pará, Brazil
| | - Waldo Lucas Luz
- Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, Pará, Brazil
| | - Mateus Santos-Silva
- Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, Pará, Brazil
| | - Tayana Carvalho
- Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, Pará, Brazil
| | - Suellen Moraes
- Instituto de Ciências da Saúde, Universidade Federal do Pará, Belém, Pará, Brazil
| | | | | | - Evander de Jesus Oliveira Batista
- Núcleo de Medicina Tropical, Universidade Federal do Pará, Belém, Pará, Brazil.,Lab. Neurofarmacologia Experimental, Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, Pará, Brazil
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Tripp JA, Salas-Allende I, Makowski A, Bass AH. Mating Behavioral Function of Preoptic Galanin Neurons Is Shared between Fish with Alternative Male Reproductive Tactics and Tetrapods. J Neurosci 2020; 40:1549-1559. [PMID: 31911461 PMCID: PMC7044739 DOI: 10.1523/jneurosci.1276-19.2019] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Revised: 12/16/2019] [Accepted: 12/18/2019] [Indexed: 11/21/2022] Open
Abstract
Understanding the contribution of neuropeptide-containing neurons to variation in social behavior remains critically important. Galanin has gained increased attention because of the demonstration that galanin neurons in the preoptic area (POA) promote mating and parental care in mammals. How widespread these mechanisms are among vertebrates essentially remains unexplored, especially among teleost fishes, which comprise nearly one-half of living vertebrate species. Teleosts with alternative reproductive tactics exhibit stereotyped patterns of social behavior that diverge widely between individuals within a sex. This includes midshipman that have two male morphs. Type I males mate using either acoustic courtship to attract females to enter a nest they guard or cuckoldry during which they steal fertilizations from a nest-holding male using a sneak or satellite spawning tactic, whereas type II males only cuckold. Using the neural activity marker phospho-S6, we show increased galanin neuron activation in courting type I males during mating that is not explained by their courtship vocalizations, parental care of eggs, or nest defense against cuckolders. This increase is not observed during mating in cuckolders of either morph or females (none of which show parental care). Together with their role in mating in male mammals, the results demonstrate an unexpectedly specific and deep-rooted, phylogenetically shared behavioral function for POA galanin neurons. The results also point to galanin-dependent circuitry as a potential substrate for the evolution of divergent phenotypes within one sex and provide new functional insights into how POA populations in teleosts compare to the POA and anterior hypothalamus of tetrapods.SIGNIFICANCE STATEMENT Studies of neuropeptide regulation of vertebrate social behavior have mainly focused on the vasopressin-oxytocin family. Recently, galanin has received attention as a regulator of social behavior largely because of studies demonstrating that galanin neurons in the preoptic area (POA) promote mating and parental care in mammals. Species with alternative reproductive tactics (ARTs) exhibit robust, consistent differences in behavioral phenotypes between individuals within a sex. Taking advantage of this trait, we show POA galanin neurons are specifically active during mating in one of two male reproductive tactics, but not other mating-related behaviors in a fish with ARTs. The results demonstrate a deep, phylogenetically shared role for POA galanin neurons in reproductive-related social behaviors with implications for the evolution of ARTs.
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Affiliation(s)
- Joel A Tripp
- Department of Neurobiology and Behavior, Cornell University, Ithaca, New York 14853
| | | | - Andrea Makowski
- Department of Neurobiology and Behavior, Cornell University, Ithaca, New York 14853
| | - Andrew H Bass
- Department of Neurobiology and Behavior, Cornell University, Ithaca, New York 14853
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Schredelseker T, Driever W. Conserved Genoarchitecture of the Basal Hypothalamus in Zebrafish Embryos. Front Neuroanat 2020; 14:3. [PMID: 32116574 PMCID: PMC7016197 DOI: 10.3389/fnana.2020.00003] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2019] [Accepted: 01/20/2020] [Indexed: 12/15/2022] Open
Abstract
Analyses of genoarchitecture recently stimulated substantial revisions of anatomical models for the developing hypothalamus in mammalian and other vertebrate systems. The prosomeric model proposes the hypothalamus to be derived from the secondary prosencephalon, and to consist of alar and basal regions. The basal hypothalamus can further be subdivided into tuberal and mamillary regions, each with distinct subregions. Albeit being a widely used model system for neurodevelopmental studies, no detailed genoarchitectural maps exist for the zebrafish (Danio rerio) hypothalamus. Here, we compare expression domains of zebrafish genes, including arxa, shha, otpa, isl1, lhx5, nkx2.1, nkx2.2a, pax6, and dlx5a, the orthologs of which delimit specific subregions within the murine basal hypothalamus. We develop the highly conserved brain-specific homeobox (bsx) gene as a novel marker for genoarchitectural analysis of hypothalamic regions. Our comparison of gene expression patterns reveals that the genoarchitecture of the basal hypothalamus in zebrafish embryos 48 hours post fertilization is highly similar to mouse embryos at E13.5. We found the tuberal hypothalamus in zebrafish embryos to be relatively large and to comprise previously ill-defined regions around the posterior hypothalamic recess. The mamillary hypothalamus is smaller and concentrates to rather medial areas in proximity to the anterior end of the neural tube floor plate. Within the basal hypothalamus we identified longitudinal and transverse tuberal and mamillary subregions topologically equivalent to those previously described in other vertebrates. However, the hypothalamic diencephalic boundary region and the posterior tuberculum still provide a challenge. We applied the updated prosomeric model to the developing zebrafish hypothalamus to facilitate cross-species comparisons. Accordingly, we applied the mammalian nomenclature of hypothalamic organization to zebrafish and propose it to replace some controversial previous nomenclature.
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Affiliation(s)
- Theresa Schredelseker
- Developmental Biology, Institute Biology I, Faculty of Biology, University of Freiburg, Freiburg, Germany.,CIBSS and BIOSS - Centres for Biological Signalling Studies, University of Freiburg, Freiburg, Germany
| | - Wolfgang Driever
- Developmental Biology, Institute Biology I, Faculty of Biology, University of Freiburg, Freiburg, Germany.,CIBSS and BIOSS - Centres for Biological Signalling Studies, University of Freiburg, Freiburg, Germany
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Ye C, Xu S, Hu Q, Hu M, Zhou L, Qin X, Jia J, Hu G. Structure and function analysis of various brain subregions and pituitary in grass carp (Ctenopharyngodon idellus). COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY D-GENOMICS & PROTEOMICS 2020; 33:100653. [PMID: 31923798 DOI: 10.1016/j.cbd.2019.100653] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Revised: 12/23/2019] [Accepted: 12/24/2019] [Indexed: 11/25/2022]
Abstract
It has been generally acknowledged that environment could alter the morphology and functional differentiation of vertebrate brain. However, as the largest group of all vertebrates, studies about the structures and functions of various brain subregions in teleost are still scarce. In this study, using grass carp as a model, histology method and RNA-sequencing were recruited to examine the microstructure and transcript levels among different brain subregions and pituitary. Histological results showed that the grass carp brain was composed of six parts, including olfactory bulb, telencephalon, hypothalamus, optic tectum, cerebellum, and medulla oblongata. In addition, compared to elasmobranchs and non-teleost bony ray-finned fishes, grass carp lost the hypothalamo-hypophyseal portal system, instead the hypophysiotropic neurons were directly terminated in the pituitary cells. At the transcriptomic level, our results suggested that the olfactory bulb might be related to reproduction and immune function. The telencephalon was deemed to be involved in the regulation of appetite and reproduction. The optic tectum might play important roles in the vision system and feeding. The hypothalamus could regulate feeding, and reproduction process. The medulla oblongata was related with the auditory system. The pituitary seemed to play pivotal roles in energy metabolism, organ development and reproduction. Finally, the correlation analysis suggested that the hypothalamus and the telencephalon were highly related, and close anatomical connection and overlapping functions suggested that the telencephalon and hypothalamus might be the regulation center of feeding and reproduction among teleost brain. This study provided a global view of the microstructures and specific functions of various brain subregions and pituitary in teleost. These results will be very helpful for further study in the neuroendocrinology regulation of growth and reproduction in teleost brain-pituitary axis.
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Affiliation(s)
- Cheng Ye
- College of Fisheries, Hubei Provincial Engineering Laboratory for Pond Aquaculture, Huazhong Agricultural University, Wuhan 430070, China
| | - Shaohua Xu
- College of Fisheries, Hubei Provincial Engineering Laboratory for Pond Aquaculture, Huazhong Agricultural University, Wuhan 430070, China
| | - Qiongyao Hu
- College of Fisheries, Hubei Provincial Engineering Laboratory for Pond Aquaculture, Huazhong Agricultural University, Wuhan 430070, China
| | - Minqiang Hu
- College of Fisheries, Hubei Provincial Engineering Laboratory for Pond Aquaculture, Huazhong Agricultural University, Wuhan 430070, China
| | - Lingling Zhou
- College of Fisheries, Hubei Provincial Engineering Laboratory for Pond Aquaculture, Huazhong Agricultural University, Wuhan 430070, China
| | - Xiangfeng Qin
- College of Fisheries, Hubei Provincial Engineering Laboratory for Pond Aquaculture, Huazhong Agricultural University, Wuhan 430070, China
| | - Jingyi Jia
- College of Fisheries, Hubei Provincial Engineering Laboratory for Pond Aquaculture, Huazhong Agricultural University, Wuhan 430070, China
| | - Guangfu Hu
- College of Fisheries, Hubei Provincial Engineering Laboratory for Pond Aquaculture, Huazhong Agricultural University, Wuhan 430070, China.
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Wullimann MF, Umeasalugo KE. Sonic hedgehog expression in zebrafish forebrain identifies the teleostean pallidal signaling center and shows preglomerular complex and posterior tubercular dopamine cells to arise from shh cells. J Comp Neurol 2019; 528:1321-1348. [PMID: 31760659 DOI: 10.1002/cne.24825] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Revised: 11/15/2019] [Accepted: 11/16/2019] [Indexed: 12/16/2022]
Abstract
Ventralization, a major patterning process in the developing vertebrate neural tube (central nervous system, CNS), depends on Sonic hedgehog (SHH) as a main signaling morphogen. We studied the CNS of late larval and young adult zebrafish in a transgenic shh-GFP line revealing increased neuroanatomical detail due to the progressed differentiation state compared to earlier stages. Some major findings emerge from the present study. (a) shh -GFP is still expressed along the adult zebrafish CNS neuraxis in most locations seen in larvae. (b) We newly identify a ventroposterior shh pallidal domain representing the basal telencephalic signaling center important for basal ganglia development known in other vertebrates (i.e., the anterior entopeduncular area-basal medial ganglionic eminence of mammals). (c) We further show late-emerging shh-GFP positive radial glia cells in the medial zone of the dorsal telencephalon (i.e., the teleostan pallial amygdala). (d) Immunostains for tyrosine hydroxylase demonstrate that there is selective colocalization in adult dopamine cells with shh-GFP in the posterior tuberculum, including in projection cells to striatum, which represents a striking parallel to amniote mesodiencephalic dopamine cell origin from shh expressing floor plate cells. (e) There is no colocalization of shh and islet1 as shown by respective shh-GFP and islet1-GFP lines. (f) The only radially far migrated shh-GFP cells are located in the preglomerular area. (g) There are no adult cerebellar and tectal shh-GFP cells confirming their exclusive role during early development as previously reported by our laboratory.
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Affiliation(s)
- Mario F Wullimann
- Department Biology II, Division of Neurobiology, Ludwig-Maximilians-Universität München (LMU Munich), Munich, Germany
| | - Kosisochukwu E Umeasalugo
- Department Biology II, Division of Neurobiology, Ludwig-Maximilians-Universität München (LMU Munich), Munich, Germany
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Diet-Induced Growth Is Regulated via Acquired Leptin Resistance and Engages a Pomc-Somatostatin-Growth Hormone Circuit. Cell Rep 2019; 23:1728-1741. [PMID: 29742429 PMCID: PMC6015746 DOI: 10.1016/j.celrep.2018.04.018] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2017] [Revised: 03/13/2018] [Accepted: 04/02/2018] [Indexed: 02/02/2023] Open
Abstract
Anorexigenic pro-opiomelanocortin (Pomc)/alpha-melanocyte stimulating hormone (αMSH) neurons of the hypothalamic melanocortin system function as key regulators of energy homeostasis, also controlling somatic growth across different species. However, the mechanisms of melanocortin-dependent growth control still remain ill-defined. Here, we reveal a thus-far-unrecognized structural and functional connection between Pomc neurons and the somatotropic hypothalamo-pituitary axis. Excessive feeding of larval zebrafish causes leptin resistance and reduced levels of the hypothalamic satiety mediator pomca. In turn, this leads to reduced activation of hypophysiotropic somatostatin (Sst)-neurons that express the melanocortin receptor Mc4r, elevated growth hormone (GH) expression in the pituitary, and enhanced somatic growth. Mc4r expression and αMSH responsiveness are conserved in Sst-expressing hypothalamic neurons of mice. Thus, acquired leptin resistance and attenuation of pomca transcription in response to excessive caloric intake may represent an ancient mechanism to promote somatic growth when food resources are plentiful.
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50
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Lozano D, Morona R, González A, López JM. Comparative Analysis of the Organization of the Catecholaminergic Systems in the Brain of Holostean Fishes (Actinopterygii/Neopterygii). BRAIN, BEHAVIOR AND EVOLUTION 2019; 93:206-235. [PMID: 31711060 DOI: 10.1159/000503769] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Accepted: 09/29/2019] [Indexed: 11/19/2022]
Abstract
Living holosteans, comprising 8 species of bowfins and gars, form a small monophyletic group of actinopterygian fishes, which are currently considered as the sister group to the enormously numerous teleosts and have largely been neglected in neuroanatomical studies. We have studied the catecholaminergic (CAergic) systems by means of antibodies against tyrosine hydroxylase (TH) and dopamine (DA) in the brain of representative species of the 3 genera included in the 2 orders of holostean fishes: Amia calva (Amiiformes) and Lepisosteus platyrhincus, Lepisosteus oculatus, and Atractosteus spatula (Lepisosteiformes). Different groups of TH/DA-immunoreactive (ir) cells were observed in the olfactory bulb, subpallium, and preoptic area of the telencephalon. Hypothalamic groups were labeled in the suprachiasmatic nucleus, tuberal (only in A. calva), retrotuberal, and retromamillary areas; specifically, the paraventricular organ showed only DA immunoreactivity. In the diencephalon, TH/DA-ir groups were detected in the prethalamus, posterior tubercle, and pretectum. In the caudal hindbrain, the solitary tract nucleus and area postrema presented TH/DA-ir cell groups, and also the spinal cord and the retina. Only in A. calva, particular CAergic cell groups were observed in the habenula, the mesencephalic tegmentum, and in the locus coeruleus. Following a neuromeric analysis, the comparison of these results with those obtained in other classes of fishes and tetrapods shows many common traits of CAergic systems shared by most vertebrates and in addition highlights unique features of actinopterygian fishes.
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Affiliation(s)
- Daniel Lozano
- Department of Cell Biology, Faculty of Biology, University Complutense, Madrid, Spain
| | - Ruth Morona
- Department of Cell Biology, Faculty of Biology, University Complutense, Madrid, Spain
| | - Agustín González
- Department of Cell Biology, Faculty of Biology, University Complutense, Madrid, Spain
| | - Jesús M López
- Department of Cell Biology, Faculty of Biology, University Complutense, Madrid, Spain,
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