Morphology of the stomach of the tropical house gecko Hemidactylus mabouia (Squamata: Gekkonidae)

Abstract

Rodrigues Sartori, S. S., Nogueira, K. O. P. C., Rocha, A. S. and Neves, C. A. 2011. Morphology of the stomach of the tropical house gecko Hemidactylus mabouia (Squamata: Gekkonidae). -Acta Zoologica (Stockholm) 92: 179-186.Hemidactylus mabouia is a common species in Brazil, which facilitates its use in research in several areas and allows display it as a benchmark for studies with reptiles. To study the morphology of the stomach of H. mabouia, we carried out anatomical, histological and histochemical analysis. The stomach of H. mabouia is 'J' shaped and can be divided into oral fundic (OF), aboral fundic (AF) and pyloric regions. The surface epithelium is composed of mucosecretory cells (MC) containing neutral mucins. In the lamina propria of the OF region, are large ramified tubulo-acinar glands, which become smaller, less ramified and more tubular towards the AF region, and are simple tubular and short in the pyloric region. The fundic glands contain differentiated neck and pit. The neck is composed of MC containing neutral mucins and the pit is made of oxyntopeptic cells (OC). The OC of the OF region contained many zymogen granules, while those of the AF region contained few zymogen granules and many mitochondria, which suggests the existence of a gradient of pepsinogen and hydrochloric acid secretion. Pyloric glands consisted of MC containing neutral mucins and both argyrophil and argentaffin endocrine cells.

Gastrointestinal Tract and Accessory Organs in the Spotted Bent-toed Gecko, Cyrtodactylus peguensis (Boulenger, 1893): A Histological and Histochemical Study

“…2D), whereas PAS-positive oxynticopeptic cells had a polymorphic shape and concentric spherical nucleus. The existence of glycoproteins in mucous neck cells was consistent with previous reports on Hemidactylus mabouia, 10 Natrix natrix, 23 and some other vertebrates. 18 The roles of mucous neck cells and oxynticopeptic cells in vertebrates are to secrete pepsinogen and hydrochloric acid (HCl), 24 although, in mammals, the chief cell secretes pepsinogen and the parietal cell secrete HCl.…”

“…This stomach structure is similar to that of Hemidactylus mabouia, which is considered to be carnivorous. 10,14 In contrast, a herbivorous animal, Iguana iguana, has a U-shaped stomach. 15 Although we could not find any literature on the Fig.…”

Gastroesophageal tube of the Iguana iguana (Iguanidae): histological description, histochemical and immunohistochemical analysis of 5-HT and SS cells

“…According to George and Castro (1998) and Elliott (2007), the esophageal mucosa of reptiles, in general, is lined by epithelium with one or two layers of columnar cells. In Squamata's, of different genus as I. iguana, Hemidactylus mabouia (Rodrigues-Sartori et al, 2011) and E. kingii (Arena et al, 1990), the esophageal epithelium is usually ciliated and pseudostratified with goblet cells, although a simple columnar epithelium has been observed in other genus such as snake Enhydris enhydris (Masyitha et al, 2020), in the chameleon Chamaeleon africanus (Hamdi et al, 2014) and in the lizards Laudakia stellio (Koca and Gürcü, 2011) and Varanus niloticus (Ahmed et al, 2009). Thus, there is no phylogenetic relationship that explains the change in the type of esophageal epithelium between different species, which may be better associated with variations in eating habits.…”

Methacarn preserves mucus integrity and improves visualization of amoebae in gills of Atlantic salmon (Salmo salar L.)

“…Its specificity for GlcNAc-carrying ligands for WGA has been investigated through fluorescence methods which were applied to study the interactions of carbohydrate-binding lectins with glycopolymers, where clustering glycopolymers were shown to induce a much enhanced binding affinity compared to the corresponding mono-and oligosaccharides (Nishimura et al, 1994). Therefore, some investigations (Coet-Zee, Kotze, & Lourens, 1995;Ferri & Liquori, 1992;Fischer et al, 1984;Madrid, Ballesta, Castells, Marin, & Pastor, 1989) hypothesized the possibility of this lectin binding to mucopolysaccharides found within the mucus and mucosal cells. They described lectin binding in goblet cells of both the small and large intestines of animals belonging to at least five different classes of vertebrates studied, that is sea bream, frog, tortoise, chicken, rat, hamster, elephant, monkey and human.…”