DENSITY OF PEPTIDE HISTIDINE-ISOLEUCINE-IMMUNOREACTIVE AND VASOACTIVE INTESTINAL PEPTIDE-IMMUNOREACTIVE NERVE-FIBERS IN THE SHEEP PINEAL-GLAND IS NOT AFFECTED BY SUPERIOR CERVICAL GANGLIONECTOMY

被引:29
作者
COZZI, B
MIKKELSEN, JD
RAVAULT, JP
LOCATELLI, A
FAHRENKRUG, J
ZHANG, ET
MOLLER, M
机构
[1] UNIV COPENHAGEN,DEPT MED ANAT,DK-2200 COPENHAGEN,DENMARK
[2] INRA,PHYSIOL REPROD STN,F-37380 NOUZILLY,FRANCE
[3] BISPEBJERG HOSP,DEPT CLIN CHEM,DK-2100 COPENHAGEN,DENMARK
关键词
NEUROPEPTIDES; SYMPATHETIC INNERVATION; PARASYMPATHETIC INNERVATION; CENTRAL INNERVATION; IMMUNOHISTOCHEMISTRY;
D O I
10.1002/cne.903430106
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
Peptide histidine-isoleucine (PHI) is a regulatory peptide, synthesized as part of the same propeptide that includes also vasoactive intestinal peptide (VIP). The present study describes the distribution of PHI-immunoreactive nerve fibers in the sheep pineal organ and compares their location with the distribution of VIP-immunoreactive fibers in both normal and superior cervical ganglionectomized sheep in order to elucidate the origin of the PHI/VIP immunoreactive nerve fibers. Several PHI-immunoreactive nerve fibers were present in the meninges and in the pineal capsule. Numerous positive nerve fibers entered the pineal gland and travelled within connective tissue spaces. Individual PHI-positive nerve fibers were either smooth, without specialization, or varicose. Generally VIP- and PHI-immunoreactive fibers were located close to connective septa and blood vessels. However, many PHIergic and VIPergic fibers possessing varicosities of variable sizes were also dispersed between pinealocytes. The distribution, density, and morphology of PHI- and VIP-immunoreactive fibers in the sheep pineal gland were similar. In superior cervical ganglionectomized animals, intrapineal VIP- and PHI-immunoreactive nerve fibers were present with the same density as in control animals. In agreement, the concentration of immunoreactive VIP and PHI did not change after ganglionectomy. No VIP- and PHI-immunoreactive cell bodies were observed in the superior cervical ganglia. Thus this study shows that the intrapineal VIP- and PHI-immunoreactive nerve fibers do not originate from the sympathetic superior cervical ganglion. (C) 1994 Wiley-Liss, Inc.
引用
收藏
页码:72 / 82
页数:11
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