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Tang M, Mei J, Sun M, Ma K, Zhao A, Fu X. An optimized method to visualize the goblet cell-associated antigen passages and identify goblet cells in the intestine, conjunctiva, and airway. Immunobiology 2022; 227:152260. [DOI: 10.1016/j.imbio.2022.152260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Revised: 07/29/2022] [Accepted: 08/15/2022] [Indexed: 11/05/2022]
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Alix M, Gasset E, Bardon-Albaret A, Noel J, Pirot N, Perez V, Coves D, Saulnier D, Lignot JH, Cucchi PN. Description of the unusual digestive tract of Platax orbicularis and the potential impact of Tenacibaculum maritimum infection. PeerJ 2020; 8:e9966. [PMID: 33024633 PMCID: PMC7520087 DOI: 10.7717/peerj.9966] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Accepted: 08/26/2020] [Indexed: 12/11/2022] Open
Abstract
Background Ephippidae fish are characterized by a discoid shape with a very small visceral cavity. Among them Platax orbicularis has a high economic potential due to its flesh quality and flesh to carcass ratio. Nonetheless, the development of its aquaculture is limited by high mortality rates, especially due to Tenacibaculum maritimum infection, occurring one to three weeks after the transfer of fishes from bio-secure land-based aquaculture system to the lagoon cages for growth. Among the lines of defense against this microbial infection, the gastrointestinal tract (GIT) is less studied. The knowledge about the morphofunctional anatomy of this organ in P. orbicularis is still scarce. Therefore, the aims of this study are to characterize the GIT in non-infected P. orbicularis juveniles to then investigate the impact of T. maritimum on this multifunctional organ. Methods In the first place, the morpho-anatomy of the GIT in non-infected individuals was characterized using various histological techniques. Then, infected individuals, experimentally challenged by T. maritimum were analysed and compared to the previously established GIT reference. Results The overlapped shape of the GIT of P. orbicularis is probably due to its constrained compaction in a narrow visceral cavity. Firstly, the GIT was divided into 10 sections, from the esophagus to the rectum. For each section, the structure of the walls was characterized, with a focus on mucus secretions and the presence of the Na+/K+ ATPase pump. An identification key allowing the characterization of the GIT sections using in toto histology is given. Secondly, individuals challenged with T. maritimum exhibited differences in mucus type and proportion and, modifications in the mucosal and muscle layers. These changes could induce an imbalance in the trade-off between the GIT functions which may be in favour of protection and immunity to the disadvantage of nutrition capacities.
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Affiliation(s)
- Maud Alix
- MARBEC, Univ Montpellier, CNRS, Ifremer, IRD, Montpellier, France.,Institute of Marine Research, Bergen, Norway
| | - Eric Gasset
- MARBEC, Univ Montpellier, CNRS, Ifremer, IRD, Montpellier, France
| | - Agnes Bardon-Albaret
- Ifremer, UMR Ecosystèmes Insulaires Océaniens, UPF, ILM, IRD, Tahiti, French Polynesia
| | - Jean Noel
- BCM, Université de Montpellier, CNRS, INSERM, Montpellier, France.,IRCM, Université de Montpellier, ICM, INSERM, Montpellier, France
| | - Nelly Pirot
- BCM, Université de Montpellier, CNRS, INSERM, Montpellier, France.,IRCM, Université de Montpellier, ICM, INSERM, Montpellier, France
| | - Valérie Perez
- MARBEC, Univ Montpellier, CNRS, Ifremer, IRD, Montpellier, France
| | - Denis Coves
- MARBEC, Univ Montpellier, CNRS, Ifremer, IRD, Montpellier, France
| | - Denis Saulnier
- Ifremer, UMR Ecosystèmes Insulaires Océaniens, UPF, ILM, IRD, Tahiti, French Polynesia
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