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Microscopic Characterization of the Mucous Cells and Their Mucin Secretions in the Alimentary Canal of the Blackmouth Catshark Galeus melastomus (Chondrichthyes: Elasmobranchii). FISHES 2022. [DOI: 10.3390/fishes7010008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Sharks belong to the most primitive group of jawed vertebrates and have some special structural and functional features such as a cartilaginous skeleton, a spiral intestinal valve, and a rectal gland for osmoregulation. In January 2020, ten specimens of Galeus melastomus, the Blackmouth catshark, were collected from the Gulf of Asinara (North Sardinia, Italy) and the entire alimentary canal was studied using histochemical reactions to characterize the mucous cell types. In the alimentary canal of G. melastomus, mucous cells mainly secrete a mixture of acidic and neutral mucins. Of the acidic mucins, only the carboxylated type was present in mucous cells of the stomach, while the sulfated type predominated in the esophagus and the intestines. The use of lectins revealed a distribution of sugar residues in mucins related to cellular activities of the different regions of the catshark alimentary canal. The current study is the first report to characterize the intestinal mucous cells of G. melastomus and to provide quantitative data on their different populations in the alimentary canal.
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Tano de la Hoz MF, Longo MV, Vidal ME, Flamini MA, Díaz AO. The stomach of the wild herbivorous hystricomorph rodent
Lagostomus maximus
: A comparative histomorphological and histochemical study of the cardiac and pyloric regions. ACTA ZOOL-STOCKHOLM 2020. [DOI: 10.1111/azo.12335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- María Florencia Tano de la Hoz
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET Buenos Aires Argentina
- Departamento de Biología FCEyN IIMyC – Instituto de Investigaciones Marinas y Costeras CONICET‐Universidad Nacional de Mar del Plata Buenos Aires Argentina
| | - María Victoria Longo
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET Buenos Aires Argentina
- Departamento de Biología FCEyN IIMyC – Instituto de Investigaciones Marinas y Costeras CONICET‐Universidad Nacional de Mar del Plata Buenos Aires Argentina
| | - Mariana Elena Vidal
- Facultad de Ciencias Exactas y Naturales Universidad Nacional de Mar del Plata Buenos Aires Argentina
| | - Mirta Alicia Flamini
- Laboratorio de Histología y Embriología Descriptiva Experimental y Comparada Facultad de Ciencias Veterinarias Universidad Nacional de La Plata Buenos Aires Argentina
| | - Alcira Ofelia Díaz
- Departamento de Biología FCEyN IIMyC – Instituto de Investigaciones Marinas y Costeras CONICET‐Universidad Nacional de Mar del Plata Buenos Aires Argentina
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