Abstract:
:The intrinsic innervation of the developing gut has long been a subject of investigation, but little is known regarding that of the embryonic cloaca. The cloaca, like the rest of the gastrointestinal tract, is intrinsically innervated by the enteric nervous system. Nitrergic neurons and fibres make up a large part of this system, thus, their distribution provides us with a useful insight into its development. Cloacal and colorectal tissue specimens were removed from chick embryos at embryonic days 11 (E11), E15 and E19. NADPH-diaphorase (NADPH-d) histochemistry was carried out using whole mount tissue preparations. Ganglia density, the number of NADPH-d-positive cells per ganglia in the myenteric plexus and cell size were calculated and statistical analysis was performed to compare both regions of the gut (P<0.001). There were significant differences in the ganglia density in the cloaca compared to the colorectum at E11 (P<0.05) and E15 (P<0.01), with the colorectum having a much denser network. In both the cloaca and the colorectum, ganglia density significantly decreased with age (P<0.001), while significant differences were observed in the number of NADPH-d-positive cells per ganglia in both regions through development. Total cell size was similar in both the cloaca and colorectum at each stage and increased in both regions through development, predominantly due to an increase in the cytoplasm. Results reveal striking differences in innervation between the chick embryo cloaca and colorectum. The sparse network of innervation evident within the cloaca in contrast to the dense network within the colorectum emphasizes the individuality of both regions. These results highlight the need for a further in-depth analysis of the enteric nervous system's development within the embryonic cloaca.
journal_name
Pediatr Surg Intjournal_title
Pediatric surgery internationalauthors
O'Donnell AM,Bannigan J,Puri Pdoi
10.1007/s00383-005-1590-7subject
Has Abstractpub_date
2006-01-01 00:00:00pages
90-4issue
1eissn
0179-0358issn
1437-9813journal_volume
22pub_type
杂志文章abstract:OBJECTIVE:Several procedures have been described for repair of distal hypospadias. However, these are not without any complications. Corpus spongiosum advancement is a new technique employed in our patients for distal hypospadias repair with excellent clinical outcome and no post-operative complications. PATIENTS AND ...
journal_title:Pediatric surgery international
pub_type: 杂志文章
doi:10.1007/s00383-013-3292-x
更新日期:2013-06-01 00:00:00
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journal_title:Pediatric surgery international
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journal_title:Pediatric surgery international
pub_type: 杂志文章
doi:10.1007/s003830050332
更新日期:1998-07-01 00:00:00
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journal_title:Pediatric surgery international
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doi:10.1007/s00383-002-0718-2
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doi:10.1007/s00383-013-3449-7
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journal_title:Pediatric surgery international
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pub_type: 杂志文章
doi:10.1007/s00383-011-2905-5
更新日期:2011-09-01 00:00:00
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journal_title:Pediatric surgery international
pub_type: 杂志文章
doi:10.1007/s003839900290
更新日期:2000-01-01 00:00:00
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journal_title:Pediatric surgery international
pub_type: 杂志文章,评审
doi:10.1007/s00383-007-2000-0
更新日期:2008-03-01 00:00:00
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journal_title:Pediatric surgery international
pub_type: 杂志文章
doi:10.1007/BF01258715
更新日期:1997-09-01 00:00:00
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journal_title:Pediatric surgery international
pub_type: 杂志文章
doi:10.1007/s003830050428
更新日期:1998-11-01 00:00:00
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pub_type: 杂志文章,评审
doi:10.1007/s00383-008-2318-2
更新日期:2009-03-01 00:00:00
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journal_title:Pediatric surgery international
pub_type: 杂志文章
doi:10.1007/s00383-012-3202-7
更新日期:2013-01-01 00:00:00
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journal_title:Pediatric surgery international
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doi:10.1007/s00383-008-2187-8
更新日期:2008-08-01 00:00:00
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journal_title:Pediatric surgery international
pub_type: 杂志文章
doi:10.1007/s003830050438
更新日期:1998-11-01 00:00:00
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pub_type: 杂志文章,评审
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更新日期:2008-10-01 00:00:00
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pub_type: 杂志文章,评审
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更新日期:2019-06-01 00:00:00
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更新日期:2004-08-01 00:00:00
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journal_title:Pediatric surgery international
pub_type: 杂志文章
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更新日期:2011-11-01 00:00:00