Histology and Mucin Histochemistry of The Digestive Tract of Yellow Catfish, Pelteobagrus fulvidraco

Abstract

The histology and characteristics of mucins secreted by epithelial mucous cells of the digestive tract in yellow catfish, Pelteobagrus fulvidraco were investigated using light microscope and transmission electron microscope. The digestive tract was divided into a pharynx, oesophagus, U-shaped stomach (with a cardiac, fundic and pyloric part) and intestine, composed of anterior intestine, middle intestine and posterior intestine, which consisted of a mucosa (epithelial layer), lamina propria-submucosa, muscularis and serosa. A large number of isolated longitudinal striated muscular bundles were present in the lamina propria-submucosa of pharynx. Goblet cells were observed throughout the digestive tract, except in the stomach. In the cardiac and fundic stomach, a plenty of gastric glands were observed, whereas they were absent in the pyloric part. Numerous mitochondria and endoplasmic reticulum were observed in the columnar epithelial cells of the intestine, especially of the anterior part. The epithelial mucous cells contained neutral or other two mixtures of acid and neutral mucins, the first being the most common. The neutral mucin was the only type of mucins in the stomach, anterior intestine and middle intestine. The results of this study will be helpful for understanding the digestive physiology and diagnosing some gastrointestinal diseases in yellow catfish.

Immunohistochemical study of the digestive tract ofOligosarcus hepsetus

“…In turn, acid GCs have high viscosity and are fundamental to trap particles [22] . The presence of these GCs was also reported in Anguilla anguilla [23] , D. dentex [21] , P. maculatus [14] , Cynoscion guatucupa (C. guatucupa) [24] , Pelteobagrus fulvidraco (P. fulvidraco) [25] and Hyphessobrycon anisitsi (H. anisitsi) [26] . The transition from the esophagus to the stomach is characterized by an abrupt change in the lining epithelium, which starts to present a single layer of columnar cells secreting mucus.…”

A comparative histochemical study of the distribution of mucins in the gastrointestinal tracts of three insectivorous mammals

“…Mucins have become an important element in the study of GI physiology, pathology and even taxonomy (Scillitani et al, 2007;Cao and Wang, 2009). The different types of mucins (neutral, sulfomucins and sialomucins) have also been implicated in the colonization of the biofilm in the GIT.…”

“…Mixed mucins, consisting of neutral and weakly stained sialomucins, were present in the Brunner's gland ducts of A. hottentotus and in a few irregularly positioned mucous cells in A. spinosissimus, which is comparable with the findings of Sheahan and Jervis (1976) for the mouse. Both acid and neutral mucins increase the viscosity of the mucous gel that protects the epithelial surface (Bansil and Turner, 2006) while additional acid mucins have been implicated in the protection of the mucosa against bacteria (Cao and Wang, 2009) and may play a similar role in the Brunner's gland secretions of the species studied here.…”

“…The distribution of the various types of gi mucins has been determined histochemically in several mammalian species (Sheahan and Jervis, 1976;Filipe, 1979;Kotzé and Coetzee, 1994) and fish species (Tibbetts, 1997;Cao and Wang, 2009). However, there is still a need for a better understanding of the distribution of mucins in normal tissues (Hattrup and Gendler, 2008).…”

The distribution of mucous secreting cells in the gastrointestinal tracts of three small rodents from Saudi Arabia: Acomys dimidiatus , Meriones rex and Meriones libycus

“…On the other hand, A. dimidiatus is mainly a granivore but also consumes small numbers of invertebrates (Varty, 1990). Over the years, several studies mapped the distribution of intestinal mucin-secreting cells in various mammalian (Sheahan and Jervis, 1976;Filipe, 1979;Coetzee et al, 1995;Kotzè and Coetzee, 1994;Boonzaier et al, 2013) and fish species (Tibbetts, 1997;Cao and Wang, 2009). Despite this, mucin distribution in normal tissue is still an area which needs further investigation (Hattrup and Gendler, 2008).…”