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Cocaine- and amphetamine-regulated transcript (CART) peptide in the nerve fibres of the porcine gallbladder wall under physiological conditions and after Salmonella Enteritidis lipopolysaccharides administration
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Abstract
Background: Cocaine- and amphetamine-regulated transcript (CART) peptide is the substance distributed in various parts of the nervous system. The majority of previous studies described this substance in the brain, where it takes part in regulatory processes connected with the food intake. CART is also present in the peripheral nervous system, especially in the enteric neurons and nerves located in the wall of the stomach and intestine, but many aspects of distribution and functions of this peptide in the digestive organs remain unknown. The aim of the present study was to investigate the changes of CART-positive nerves in the porcine gallbladder after administration of low-dose Salmonella Enteritidis lipopolysaccharide (LPS) using the single immunofluorescence technique. Materials and methods: Seven days after the injection of 5 μg/kg b.w. LPS S. Enteritidis the gallbladders were collected. CART-positive nerves were studied with standard single immunofluorescence method and counted per observation field (0.1 m2). Results: In control animals the average number of CART-positive nerves per observation field (0.1 mm2) amounted to 5.38 ± 0.32, 11.11 ± 1.56 and 2.97 ± ± 0.24 in gallbladder neck, body and fundus, respectively. LPS administration caused the increase in the number of CART-positive fibres in all parts of gallbladder, and these values amounted to 12.74 ± 0.51, 19.75 ± 0.19 and 5.1 ± 0.05 in the gallbladder neck, body and fundus, respectively. Conclusions: The obtained results suggest that CART is involved in the neuronal regulatory processes in the porcine gallbladder under physiological conditions, but also during pathological processes, but exact functions of this peptide in this organ remain unexplained and require the further investigation.
Abstract
Background: Cocaine- and amphetamine-regulated transcript (CART) peptide is the substance distributed in various parts of the nervous system. The majority of previous studies described this substance in the brain, where it takes part in regulatory processes connected with the food intake. CART is also present in the peripheral nervous system, especially in the enteric neurons and nerves located in the wall of the stomach and intestine, but many aspects of distribution and functions of this peptide in the digestive organs remain unknown. The aim of the present study was to investigate the changes of CART-positive nerves in the porcine gallbladder after administration of low-dose Salmonella Enteritidis lipopolysaccharide (LPS) using the single immunofluorescence technique. Materials and methods: Seven days after the injection of 5 μg/kg b.w. LPS S. Enteritidis the gallbladders were collected. CART-positive nerves were studied with standard single immunofluorescence method and counted per observation field (0.1 m2). Results: In control animals the average number of CART-positive nerves per observation field (0.1 mm2) amounted to 5.38 ± 0.32, 11.11 ± 1.56 and 2.97 ± ± 0.24 in gallbladder neck, body and fundus, respectively. LPS administration caused the increase in the number of CART-positive fibres in all parts of gallbladder, and these values amounted to 12.74 ± 0.51, 19.75 ± 0.19 and 5.1 ± 0.05 in the gallbladder neck, body and fundus, respectively. Conclusions: The obtained results suggest that CART is involved in the neuronal regulatory processes in the porcine gallbladder under physiological conditions, but also during pathological processes, but exact functions of this peptide in this organ remain unexplained and require the further investigation.
Keywords
lipopolysaccharide (LPS), Salmonella Enteritidis, immunofluorescence, nerves, cocaine- and amphetamine-regulated transcript (CART)
About this articleTitle
Cocaine- and amphetamine-regulated transcript (CART) peptide in the nerve fibres of the porcine gallbladder wall under physiological conditions and after Salmonella Enteritidis lipopolysaccharides administration
Journal
Issue
Article type
Original article
Pages
596-602
Published online
2017-04-10
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1683
Article views/downloads
1404
DOI
Pubmed
Bibliographic record
Folia Morphol 2017;76(4):596-602.
Keywords
lipopolysaccharide (LPS)
Salmonella Enteritidis
immunofluorescence
nerves
cocaine- and amphetamine-regulated transcript (CART)
Authors
A. Mikołajczyk
K. Makowska
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