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Hibberd TJ, Yew WP, Dodds KN, Xie Z, Travis L, Brookes SJ, Costa M, Hu H, Spencer NJ. Quantification of CGRP-immunoreactive myenteric neurons in mouse colon. J Comp Neurol 2022; 530:3209-3225. [PMID: 36043843 DOI: 10.1002/cne.25403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2022] [Revised: 08/08/2022] [Accepted: 08/17/2022] [Indexed: 11/07/2022]
Abstract
Quantitative data of biological systems provide valuable baseline information for understanding pathology, experimental perturbations, and computational modeling. In mouse colon, calcitonin gene-related peptide (CGRP) is expressed by myenteric neurons with multiaxonal (Dogiel type II) morphology, characteristic of intrinsic primary afferent neurons (IPANs). Analogous neurons in other species and gut regions represent 5-35% of myenteric neurons. We aimed to quantify proportions of CGRP-immunopositive (CGRP+) myenteric neurons. Colchicine-treated wholemount preparations of proximal, mid, and distal colon were labeled for HuC/D, CGRP, nitric oxide synthase (NOS), and peripherin (Per). The pan-neuronal markers (Hu+/Per+) co-labeled 94% of neurons. Hu+/Per- neurons comprised ∼6%, but Hu-/Per+ cells were rare. Thus, quantification was based on Hu+ myenteric neurons (8576 total; 1225 ± 239 per animal, n = 7). CGRP+ cell bodies were significantly larger than the average of all Hu+ neurons (329 ± 13 vs. 261 ± 12 μm2 , p < .0001). CGRP+ neurons comprised 19% ± 3% of myenteric neurons without significant regional variation. NOS+ neurons comprised 42% ± 2% of myenteric neurons overall, representing a lower proportion in proximal colon, compared to mid and distal colon (38% ± 2%, 44% ± 2%, and 44% ± 3%, respectively). Peripherin immunolabeling revealed cell body and axonal morphology in some myenteric neurons. Whether all CGRP+ neurons were multiaxonal could not be addressed using peripherin immunolabeling. However, of 118 putatively multiaxonal neurons first identified based on peripherin immunoreactivity, all were CGRP+ (n = 4). In conclusion, CGRP+ myenteric neurons in mouse colon were comprehensively quantified, occurring within a range expected of a putative IPAN marker. All Per+ multiaxonal neurons, characteristic of Dogiel type II/IPAN morphology, were CGRP+.
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Affiliation(s)
- Timothy J Hibberd
- College of Medicine and Public Health, Flinders Health and Medical Research Institute, Flinders University, Adelaide, South Australia, Australia
| | - Wai Ping Yew
- College of Medicine and Public Health, Flinders Health and Medical Research Institute, Flinders University, Adelaide, South Australia, Australia
| | - Kelsi N Dodds
- College of Medicine and Public Health, Flinders Health and Medical Research Institute, Flinders University, Adelaide, South Australia, Australia
| | - Zili Xie
- Department of Anesthesiology, The Center for the Study of Itch & Sensory Disorders, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Lee Travis
- College of Medicine and Public Health, Flinders Health and Medical Research Institute, Flinders University, Adelaide, South Australia, Australia
| | - Simon J Brookes
- College of Medicine and Public Health, Flinders Health and Medical Research Institute, Flinders University, Adelaide, South Australia, Australia
| | - Marcello Costa
- College of Medicine and Public Health, Flinders Health and Medical Research Institute, Flinders University, Adelaide, South Australia, Australia
| | - Hongzhen Hu
- Department of Anesthesiology, The Center for the Study of Itch & Sensory Disorders, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Nick J Spencer
- College of Medicine and Public Health, Flinders Health and Medical Research Institute, Flinders University, Adelaide, South Australia, Australia
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Ceccotti C, Giaroni C, Bistoletti M, Viola M, Crema F, Terova G. Neurochemical characterization of myenteric neurons in the juvenile gilthead sea bream (Sparus aurata) intestine. PLoS One 2018; 13:e0201760. [PMID: 30075006 PMCID: PMC6075763 DOI: 10.1371/journal.pone.0201760] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Accepted: 07/20/2018] [Indexed: 12/12/2022] Open
Abstract
We evaluated the chemical coding of the myenteric plexus in the proximal and distal intestine of gilthead sea bream (Sparus aurata), which represents one of the most farmed fish in the Mediterranean area. The presence of nitric oxide (NO), acetylcholine (ACh), serotonin (5-HT), calcitonin-gene-related peptide (CGRP), substance P (SP) and vasoactive intestinal peptide (VIP) containing neurons, was investigated in intestinal whole mount preparations of the longitudinal muscle with attached the myenteric plexus (LMMP) by means of immunohistochemical fluorescence staining. The main excitatory and inhibitory neurochemicals identified in intestinal smooth muscle were ACh, SP, 5HT, and NO, VIP, CGRP. Some neurons displayed morphological features of ascending and descending interneurons and of putative sensory neurons. The expression of these pathways in the two intestinal regions is largely superimposable, although some differences emerged, which may be relevant to the morphological properties of each region. The most important variances are the higher neuronal density and soma size in the proximal intestine, which may depend on the volume of the target tissue. Since in the fish gut the submucosal plexus is less developed, myenteric neurons substantially innervate also the submucosal and epithelial layers, which display a major thickness and surface in the proximal intestine. In addition, myenteric neurons containing ACh and SP, which mainly represent excitatory motor neurons and interneurons innervating the smooth muscle were more numerous in the distal intestine, possibly to sustain motility in the thicker smooth muscle coat. Overall, this study expands our knowledge of the intrinsic innervation that regulates intestinal secretion, absorption and motility in gilthead sea bream and provides useful background information for rational design of functional feeds aimed at improving fish gut health.
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Affiliation(s)
- Chiara Ceccotti
- Department of Biotechnology and Life Sciences, University of Insubria, Varese, Italy
| | - Cristina Giaroni
- Department of Medicine and Surgery, University of Insubria, Varese, Italy
| | - Michela Bistoletti
- Department of Medicine and Surgery, University of Insubria, Varese, Italy
| | - Manuela Viola
- Department of Medicine and Surgery, University of Insubria, Varese, Italy
| | - Francesca Crema
- Department of Internal Medicine and Therapeutics, Section of Pharmacology, University of Pavia, Pavia, Italy
| | - Genciana Terova
- Department of Biotechnology and Life Sciences, University of Insubria, Varese, Italy
- Inter-University Centre for Research in Protein Biotechnologies "The Protein Factory"- Polytechnic University of Milan and University of Insubria, Varese, Italy
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Brijs J, Hennig GW, Kellermann AM, Axelsson M, Olsson C. The presence and role of interstitial cells of Cajal in the proximal intestine of shorthorn sculpin (Myoxocephalus scorpius). ACTA ACUST UNITED AC 2016; 220:347-357. [PMID: 27875260 DOI: 10.1242/jeb.141523] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2016] [Accepted: 11/03/2016] [Indexed: 12/27/2022]
Abstract
Rhythmic contractions of the mammalian gastrointestinal tract can occur in the absence of neuronal or hormonal stimulation owing to the generation of spontaneous electrical activity by interstitial cells of Cajal (ICC) that are electrically coupled to smooth muscle cells. The myogenically driven component of gastrointestinal motility patterns in fish probably also involves ICC; however, little is known of their presence, distribution and function in any fish species. In the present study, we combined immunohistochemistry and in vivo recordings of intestinal motility to investigate the involvement of ICC in the motility of the proximal intestine in adult shorthorn sculpin (Myoxocephalus scorpius). Antibodies against anoctamin 1 (Ano1, a Ca2+-activated Cl- channel), revealed a dense network of multipolar, repeatedly branching cells in the myenteric region of the proximal intestine, similar in many regards to the mammalian ICC-MY network. The addition of benzbromarone, a potent blocker of Ano1, altered the motility patterns seen in vivo after neural blockade with TTX. The results indicate that ICC are integral for the generation and propagation of the majority of rhythmic contractile patterns in fish, although their frequency and amplitude can be modulated via neural activity.
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Affiliation(s)
- Jeroen Brijs
- Department of Biological and Environmental Sciences, University of Gothenburg, SE-405 30 Göteborg, Sweden
| | - Grant W Hennig
- Department of Physiology and Cell Biology, University of Reno, Nevada, NV 89557, USA
| | - Anna-Maria Kellermann
- Department of Nature and Engineering, Bremen University of Applied Sciences, Bremen 28199, Germany
| | - Michael Axelsson
- Department of Biological and Environmental Sciences, University of Gothenburg, SE-405 30 Göteborg, Sweden
| | - Catharina Olsson
- Department of Biological and Environmental Sciences, University of Gothenburg, SE-405 30 Göteborg, Sweden
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Okamoto T, Barton MJ, Hennig GW, Birch GC, Grainger N, Corrigan RD, Koh SD, Sanders KM, Smith TK. Extensive projections of myenteric serotonergic neurons suggest they comprise the central processing unit in the colon. Neurogastroenterol Motil 2014; 26:556-70. [PMID: 24460867 DOI: 10.1111/nmo.12302] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/06/2013] [Accepted: 12/12/2013] [Indexed: 01/02/2023]
Abstract
BACKGROUND 5-Hydroxytryptamine (5-HT, serotonin) is an important regulator of colonic motility and secretion; yet the role of serotonergic neurons in the colon is controversial. METHODS We used immunohistochemical techniques to examine their projections throughout the enteric nervous system and interstitial cells of Cajal (ICC) networks in the murine proximal to mid colon. KEY RESULTS Serotonergic neurons, which were mainly calbindin positive, occurred only in myenteric ganglia (1 per 3 ganglia). They were larger than nNOS neurons but similar in size to Dogiel Type II (AH) neurons. 5-HT neurons, appeared to make numerous varicose contacts with each other, most nNOS neurons, Dogiel Type II/AH neurons and glial cells. 5-HT, calbindin and nNOS nerve fibers also formed a thin perimuscular nerve plexus that was associated with ganglia, which contained both nNOS positive and negative neurons, which lay directly upon the submucosal pacemaker ICC network. Neurons in perimuscular ganglia were surrounded by 5-HT varicosities. Submucous ganglia contained nNOS positive and negative neurons, and calbindin positive neurons, which also appeared richly supplied by serotonergic nerve varicosities. Serotonergic nerve fibers ran along submucosal arterioles, but not veins. Varicosities of serotonergic nerve fibers were closely associated with pacemaker ICC networks and with intramuscular ICC (ICC-IM). 5-HT2B receptors were found on a subpopulation of non-5-HT containing myenteric neurons and their varicosities, pacemaker ICC-MY and ICC-IM. CONCLUSIONS & INFERENCES Myenteric serotonergic neurons, whose axons exhibit considerable divergence, regulate the entire enteric nervous system and are important in coordinating motility with secretion. They are not just interneurons, as regularly assumed, but possibly also motor neurons to ICC and blood vessels, and some may even be sensory neurons.
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Affiliation(s)
- T Okamoto
- Department of Physiology and Cell Biology, University of Nevada School of Medicine, Reno, NV, USA
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Mandrioli L, Sirri R, Gustinelli A, Quaglio F, Sarli G, Chiocchetti R. Ocular glioneuroma with medulloepitheliomatous differentiation in a goldfish (Carassius auratus). J Vet Diagn Invest 2014; 26:167-72. [DOI: 10.1177/1040638713515218] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
An intraocular mass in the left eye causing chronic severe exophthalmia in an adult female goldfish ( Carassius auratus) is described. The fish shared an aquarium with another goldfish found dead with gross and microscopic lesions consistent with mycobacteriosis. Histological examination of the left eye, histochemical (periodic acid–Schiff [PAS], Alcian blue, Ziehl–Neelsen) and immunohistochemical tests (glial fibrillary acidic protein, human neuronal protein, vimentin, and cytokeratin AE1/AE3) were carried out on the intraocular mass. Neoplastic cells forming an unencapsulated highly cellular proliferation partially covered by an intact corneal epithelium were stained with Alcian blue, which demonstrated an abundant hyaluronic acid–rich extracellular matrix. Multifocally, there were cyst-like dilatations bordered by neuroepithelial cells, which were PAS-positive. The complex neoplastic proliferation was composed of glial-like cells, neuronal-like cells (immunoreactive to glial fibrillary acidic protein and human neuronal protein, respectively) and neuroepithelium, which suggested a retinal origin.
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Affiliation(s)
- Luciana Mandrioli
- Department of Veterinary Medical Sciences, Alma Mater Studiorum University of Bologna, Bologna, Italy (Mandrioli, Sirri, Gustinelli, Sarli, Chiocchetti)
- Department of Comparative Biomedicine and Food Science, University of Padua, Agripolis, Viale dell’Università 16, Legnaro, Padua, Italy (Quaglio)
| | - Rubina Sirri
- Department of Veterinary Medical Sciences, Alma Mater Studiorum University of Bologna, Bologna, Italy (Mandrioli, Sirri, Gustinelli, Sarli, Chiocchetti)
- Department of Comparative Biomedicine and Food Science, University of Padua, Agripolis, Viale dell’Università 16, Legnaro, Padua, Italy (Quaglio)
| | - Andrea Gustinelli
- Department of Veterinary Medical Sciences, Alma Mater Studiorum University of Bologna, Bologna, Italy (Mandrioli, Sirri, Gustinelli, Sarli, Chiocchetti)
- Department of Comparative Biomedicine and Food Science, University of Padua, Agripolis, Viale dell’Università 16, Legnaro, Padua, Italy (Quaglio)
| | - Francesco Quaglio
- Department of Veterinary Medical Sciences, Alma Mater Studiorum University of Bologna, Bologna, Italy (Mandrioli, Sirri, Gustinelli, Sarli, Chiocchetti)
- Department of Comparative Biomedicine and Food Science, University of Padua, Agripolis, Viale dell’Università 16, Legnaro, Padua, Italy (Quaglio)
| | - Giuseppe Sarli
- Department of Veterinary Medical Sciences, Alma Mater Studiorum University of Bologna, Bologna, Italy (Mandrioli, Sirri, Gustinelli, Sarli, Chiocchetti)
- Department of Comparative Biomedicine and Food Science, University of Padua, Agripolis, Viale dell’Università 16, Legnaro, Padua, Italy (Quaglio)
| | - Roberto Chiocchetti
- Department of Veterinary Medical Sciences, Alma Mater Studiorum University of Bologna, Bologna, Italy (Mandrioli, Sirri, Gustinelli, Sarli, Chiocchetti)
- Department of Comparative Biomedicine and Food Science, University of Padua, Agripolis, Viale dell’Università 16, Legnaro, Padua, Italy (Quaglio)
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Zaccone G, Lauriano ER, Silvestri G, Kenaley C, Icardo JM, Pergolizzi S, Alesci A, Sengar M, Kuciel M, Gopesh A. Comparative neurochemical features of the innervation patterns of the gut of the basal actinopterygian,Lepisosteus oculatus, and the euteleost,Clarias batrachus. ACTA ZOOL-STOCKHOLM 2013. [DOI: 10.1111/azo.12059] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Giacomo Zaccone
- Dipartimento di Scienze dell'Ambiente, della Sicurezza, del Territorio, degli Alimenti e della Salute (S.A.S.T.A.S.); University of Messina; Viale Stagno d'Alcontres 31 Messina I-98166 Italy
| | - Eugenia Rita Lauriano
- Dipartimento di Scienze dell'Ambiente, della Sicurezza, del Territorio, degli Alimenti e della Salute (S.A.S.T.A.S.); University of Messina; Viale Stagno d'Alcontres 31 Messina I-98166 Italy
| | - Giuseppa Silvestri
- Dipartimento di Scienze dell'Ambiente, della Sicurezza, del Territorio, degli Alimenti e della Salute (S.A.S.T.A.S.); University of Messina; Viale Stagno d'Alcontres 31 Messina I-98166 Italy
| | | | - José M. Icardo
- Department of Anatomy and Cell Biology; University of Cantabria; 39011 Santander Spain
| | - Simona Pergolizzi
- Dipartimento di Scienze dell'Ambiente, della Sicurezza, del Territorio, degli Alimenti e della Salute (S.A.S.T.A.S.); University of Messina; Viale Stagno d'Alcontres 31 Messina I-98166 Italy
| | - Alessio Alesci
- Dipartimento di Scienze dell'Ambiente, della Sicurezza, del Territorio, degli Alimenti e della Salute (S.A.S.T.A.S.); University of Messina; Viale Stagno d'Alcontres 31 Messina I-98166 Italy
| | - Manvendra Sengar
- Department of Zoology; Institute of Basic Sciences; Bundelkhand University; Jhansi 284128 India
| | - Michal Kuciel
- Department of Comparative Anatomy; Jagiellonian University; Krakow 30-387 Poland
| | - Anita Gopesh
- Department of Zoology; University of Allahabad; Allahabad 211002 India
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Sorteni C, Clavenzani P, De Giorgio R, Portnoy O, Sirri R, Mordenti O, Di Biase A, Parmeggiani A, Menconi V, Chiocchetti R. Enteric neuroplasticity in seawater-adapted European eel (Anguilla anguilla). J Anat 2013; 224:180-91. [PMID: 24433383 DOI: 10.1111/joa.12131] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/26/2013] [Indexed: 12/01/2022] Open
Abstract
European eels live most of their lives in freshwater until spawning migration to the Sargasso Sea. During seawater adaptation, eels modify their physiology, and their digestive system adapts to the new environment, drinking salt water to compensate for the continuous water loss. In that period, eels stop feeding until spawning. Thus, the eel represents a unique model to understand the adaptive changes of the enteric nervous system (ENS) to modified salinity and starvation. To this purpose, we assessed and compared the enteric neuronal density in the cranial portion of the intestine of freshwater eels (control), lagoon eels captured in brackish water before their migration to the Sargasso Sea (T0), and starved seawater eels hormonally induced to sexual maturity (T18; 18 weeks of starvation and treatment with standardized carp pituitary extract). Furthermore, we analyzed the modification of intestinal neuronal density of hormonally untreated eels during prolonged starvation (10 weeks) in seawater and freshwater. The density of myenteric (MP) and submucosal plexus (SMP) HuC/D-immunoreactive (Hu-IR) neurons was assessed in wholemount preparations and cryosections. The number of MP and SMP HuC/D-IR neurons progressively increased from the freshwater to the salty water habitat (control > T0 > T18; P < 0.05). Compared with freshwater eels, the number of MP and SMP HuC/D-IR neurons significantly increased (P < 0.05) in the intestine of starved untreated salt water eels. In conclusion, high salinity evokes enteric neuroplasticity as indicated by the increasing number of HuC/D-IR MP and SMP neurons, a mechanism likely contributing to maintaining the body homeostasis of this fish in extreme conditions.
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Affiliation(s)
- C Sorteni
- Department of Veterinary Medical Science (UNI EN ISO 9001:2008), University of Bologna, Bologna, Italy; Centro interdipartimentale di ricerca sull'alimentazione umana, University of Bologna, Bologna, Italy
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Graña P, Huesa G, Anadón R, Yáñez J. Immunohistochemical study of the distribution of calcium binding proteins in the brain of a chondrostean (Acipenser baeri). J Comp Neurol 2012; 520:2086-122. [DOI: 10.1002/cne.23030] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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Calbindin-D28k immunoreactivity in sympathetic ganglionic neurons during development. Auton Neurosci 2012; 167:27-33. [DOI: 10.1016/j.autneu.2011.11.005] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2011] [Revised: 10/30/2011] [Accepted: 11/28/2011] [Indexed: 11/18/2022]
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Olsson C. Calbindin immunoreactivity in the enteric nervous system of larval and adult zebrafish (Danio rerio). Cell Tissue Res 2011; 344:31-40. [DOI: 10.1007/s00441-011-1135-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2010] [Accepted: 01/13/2011] [Indexed: 12/31/2022]
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