PMID- 16433672
OWN - NLM
STAT- MEDLINE
DCOM- 20060629
LR  - 20061115
IS  - 0340-2096 (Print)
IS  - 0340-2096 (Linking)
VI  - 35
IP  - 1
DP  - 2006 Feb
TI  - Histology and histochemistry of the pharyngeal cavity and oesophagus of the 
      silverside Odontesthes bonariensis (Cuvier and Valenciennes).
PG  - 42-6
AB  - The histology of the pharyngeal cavity and oesophagus of the freshwater 
      'silverside'Odontesthes bonariensis (Cuvier and Valenciennes) and the 
      characteristics of their mucous cells were investigated. The histological 
      characterization of its digestive wall revealed that the mucosa is thrown with 
      longitudinal folds. The epithelium covering the folds was stratified with 
      abundant mucous cells and gustative corpuscles, which are lacking in the 
      oesophagus. The muscularis mucosa was absent. The submucosa presented the 
      compactum stratum. The muscularis was organized in longitudinal and circular 
      layers of muscular striated fibres. The serosa with a flat epithelium was located 
      only in the oesophagus. Using histochemical procedures including methods for 
      localization and characterization of glycoproteins (GPs), no differences were 
      detected between the mucous cells contents of the pharyngeal cavity and those of 
      the oesophagus. The mucous cells showed a weak periodic acid-Schiff (PAS) 
      positive reaction in their content. The reactions for the differential analysis 
      of sialic acids from GPs are feeble for periodic acid-Schiff at low temperature 
      and low pH (PA*S) and KOH/PA*S and strong for periodic acid/borohydride/KOH/PAS 
      (PA/Bh/KOH/PAS) and KOH/PA*/Bh/PAS revealing the scarce presence of C7 or C9 
      substituted and non-substituted sialic acids and the abundance of C7, C8 
      substituted sialic acids, O-acyl sugars and neutral sugars respectively. The 
      results suggest that the pharyngeal cavity with the gustative corpuscles would 
      induce the gastric secretion whereas the oesophagus is mainly involved in the 
      transport of the food bolus to the stomach with the aid of abundant secretion of 
      mucus. GPs secreted on the surface of the mucous cells, likely related to 
      environmental conditions, would be involved in the lubrication, protection 
      against abrasion and inhibition of microorganism proliferation.
FAU - Diaz, A O
AU  - Diaz AO
AD  - Departamento de Biologia, Facultad de Ciencias Exactas y Naturales, Universidad 
      Nacional de Mar del Plata, Funes 3250 3rd piso, 7600 Mar del Plata, Argentina. 
      adiaz@mdp.edu.ar
FAU - Escalante, A H
AU  - Escalante AH
FAU - Garcia, A M
AU  - Garcia AM
FAU - Goldemberg, A L
AU  - Goldemberg AL
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - Germany
TA  - Anat Histol Embryol
JT  - Anatomia, histologia, embryologia
JID - 7704218
SB  - IM
MH  - Animals
MH  - Esophagus/*anatomy & histology/physiology
MH  - Female
MH  - Male
MH  - Mucous Membrane/cytology
MH  - Periodic Acid-Schiff Reaction/veterinary
MH  - Pharynx/*anatomy & histology/physiology
MH  - Smegmamorpha/*anatomy & histology
MH  - Staining and Labeling/veterinary
EDAT- 2006/01/26 09:00
MHDA- 2006/06/30 09:00
CRDT- 2006/01/26 09:00
PHST- 2006/01/26 09:00 [pubmed]
PHST- 2006/06/30 09:00 [medline]
PHST- 2006/01/26 09:00 [entrez]
AID - AHE654 [pii]
AID - 10.1111/j.1439-0264.2005.00654.x [doi]
PST - ppublish
SO  - Anat Histol Embryol. 2006 Feb;35(1):42-6. doi: 10.1111/j.1439-0264.2005.00654.x.