Document Detail


On the origin and distribution of vasoactive intestinal polypeptide-, peptide HI-, and cholecystokinin-like-immunoreactive nerve fibers in the rat iris.
MedLine Citation:
PMID:  3899364     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The presence and distribution of nerve fibers expressing immunoreactivity to the neuropeptides vasoactive intestinal polypeptide, peptide HI and cholecystokinin was examined in stretch-prepared rat iris whole mounts. By use of antiserum to vasoactive intestinal polypeptide an irregular, relatively sparse network of varicose, intensely fluorescent fibers was observed innervating both the dilator plate and the sphincter area. Positive fibers were present also in the ciliary body and the choroid membrane. Surprisingly, a large variation in the amount of vasoactive intestinal polypeptide-positive nerves was seen among irides. Furthermore, an uneven distribution of fluorescent nerve fibers was observed within individual irides. Thus, some areas had a relatively dense innervation, whereas others were devoid of immunoreactive nerve fibers. A similar fiber system was detected using antiserum to peptide HI. In all probability, vasoactive intestinal polypeptide and peptide HI coexist within the same nerve population. A denser and more regular network of cholecystokinin-positive fibers was found in normal rat irides. Such fibers were also present in the sphincter area and in high density in the choroid membrane. Neither extirpation of the superior cervical nor the ciliary ganglion caused any detectable decrease in amount of either vasoactive intestinal polypeptide/peptide HI- or cholecystokinin-positive fibers. However, capsaicin, which in the iris causes permanent disappearance of substance-P fibers, had a similar effect on cholecystokinin-positive fibers, whereas no effect was noted on the vasoactive intestinal polypeptide/peptide HI fiber network.(ABSTRACT TRUNCATED AT 250 WORDS)
Authors:
H Björklund; J Fahrenkrug; A Seiger; J J Vanderhaeghen; L Olson
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Cell and tissue research     Volume:  242     ISSN:  0302-766X     ISO Abbreviation:  Cell Tissue Res.     Publication Date:  1985  
Date Detail:
Created Date:  1985-11-14     Completed Date:  1985-11-14     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0417625     Medline TA:  Cell Tissue Res     Country:  GERMANY, WEST    
Other Details:
Languages:  eng     Pagination:  1-7     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Animals
Cholecystokinin / analysis
Female
Fluorescent Antibody Technique
Iris / analysis*,  cytology
Male
Nerve Fibers / analysis*
Nerve Tissue Proteins / analysis*
Peptide PHI
Peptides / analysis
Rats
Rats, Inbred Strains
Vasoactive Intestinal Peptide / analysis
Chemical
Reg. No./Substance:
0/Nerve Tissue Proteins; 0/Peptide PHI; 0/Peptides; 37221-79-7/Vasoactive Intestinal Peptide; 9011-97-6/Cholecystokinin

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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