Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: EC:1.11.1.7 (peroxidase)
 65,474 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

The distribution of calcitonin gene-related peptide (CGRP), immunoreactive structures in the central nervous system of the frog, Rana esculenta, was studied using the peroxidase immunohistochemical method. Immunoreactive perikarya were found in all major parts of the brain. In the forebrain, neurons of the septohippocampal formation, the amygdala, the ventromedial and posterocentral thalamic nuclei, and the cerebrospinal fluid contacting neurons in the diencephalic periventricular organ showed immunoreactivity. The pear-shaped neurons of the optic tectum, and perikarya of the oculomotor nucleus in the midbrain were also immunoreactive. In the hindbrain, neurons of the cranial nerve motor nuclei, neurons of the superior vestibular nucleus, giant cells of the reticular formation, and preganglionic parasympathetic neurons of the superior salivatory nucleus were stained. Motoneurons presented immunostaining also in the spinal cord. Immunoreactive fibers were shown to occur in the olfactory tract, the striatum, the tegmentum and the basis mesencephali, the descending tract of the trigeminal nerve, the solitary tract, Lissauer's tract, and the dorsal horn of spinal cord. A comparison of the distribution of CGRP immunoreactivity in the mammalian and amphibian central nervous system revealed that, in relation to the size of the brain, CGRP is more extensively distributed in the amphibian than in the mammalian limbic system.
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PMID:Distribution of calcitonin gene-related peptide immunoreactivity in the central nervous system of the frog, Rana esculenta. 142 13

Afferent pathways from the uterus of the cat were labeled by injections of horseradish peroxidase (HRP), wheat germ agglutinin-HRP, or fluorescent dyes into the uterine cervix and uterine horns. Afferent input to the uterus arises from small to medium size neurons (average size 31 x 28 microns) in dorsal root ganglia at many levels of the spinal cord (T12-S3). The segmental origin correlates with the location of the afferent terminal field in the uterus. Eighty-seven percent of the dorsal root ganglion cells (average, 822 on one side) innervating the cervix are located in sacral ganglia, whereas 97% of the cells innervating the uterine horn (average 479 on one side) are located in lumbar ganglia. Double dye labeling experiments indicate that a small percentage (average 15%) of lumbar neurons innervating the uterine cervix also innervate the uterine horn. The majority (70-80%) of afferent input to the uterine cervix passes through the pelvic nerve and the remainder through the pudendal nerve, whereas afferent input to the uterine horn must travel in sympathetic nerves. Ovariectomy (10-14 days) did not change significantly the number, sizes, or segmental distribution of uterine afferent neurons. In some cats (25%) injections of WGA-HRP into the uterine cervix labeled neurons (90-125 per animal) in lamina VII in the S2 spinal segment in the region of the sacral parasympathetic nucleus. Central projections of uterine horn afferent neurons were not labeled; however, afferent projections from the cervix were detected in the sacral spinal cord. The most prominent labeling was present in Lissauer's tract and in lamina I and outer lamina II on the lateral edge of the dorsal horn. From this region some labeled axons extended through lamina V into the dorsal gray commissure. Very few afferents were labeled on the medial side of the dorsal horn. These results are discussed in regard to the physiological function of uterine afferents and the possible transmitter role of vasoactive intestinal polypeptide, which is present in a large percentage (70%) of cervical afferent neurons.
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PMID:Central distribution of afferent pathways from the uterus of the cat. 170 67

We studied the spinal projections of the medial and posterior articular nerves (MAN and PAN) of the knee joint in the cat with the aid of the transganglionic transport of horseradish peroxidase. The afferent fibers of the MAN entered the spinal cord via the lumbar dorsal roots L5 and L6 and those of the PAN entered via the dorsal roots L6 and L7. Within the dorsal root ganglia, most labeled neurons had small to medium diameters. A relatively higher number of medium-size cell bodies were labeled from the PAN than from the MAN. In the spinal cord labeled MAN afferent fibers and terminations were most dense in the L5 and L6 segments, and those of the PAN were most dense in L6 and L7, that is, in the respective segments of entry. Labeled afferent fibers from both nerves projected rostrally at least as far as L1 and caudally as far as S2. Labeled fibers were found in Lissauer's tract as well as in the dorsal column immediately adjacent to the dorsal horn. In the spinal gray matter, both nerves had two main projection fields, one in the cap of the dorsal horn in lamina I, the other in the deep dorsal horn in laminae V-VI and the dorsal part of lamina VII. Both nerves, but particularly the PAN, projected to the medial portion of Clarke's column. No projection was found to laminae II, III, and IV of the dorsal horn or to the ventral horn. Since these findings parallel observations on hindlimb muscle afferent fibers, the present data support the existence of a common pattern for the central distribution of deep somatic afferent fibers.
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PMID:The projection of the medial and posterior articular nerves of the cat's knee to the spinal cord. 246 29

Application of horseradish peroxidase to the pudendal nerve in the female cat labelled lumbosacral afferent and efferent neurons and their processes. Afferent axons entered the spinal cord primarily at the S1 and S2 segments and traveled rostrocaudally in Lissauer's tract and the dorsal columns. A distinctive component of the dorsal column projection was located at the lamina I-dorsal column border as a densely labelled, compact bundle that distributed fibers to the dorsal horn at spinal levels near the segments of entry of the afferent axons. Afferent terminal labelling was located in the marginal zone, the intermediate gray matter, and the dorsal gray commissure in the lumbosacral and coccygeal spinal cord. A well-defined terminal field restricted to the S1 and rostral S2 segments was present in the medial third of the nucleus proprius and substantia gelatinosa. Labelled motoneurons in Onuf's nucleus (S1 and S2) exhibited longitudinal dendrites that extended rostrocaudally within the nucleus and three groups of transverse dendrites that emanated periodically from the nucleus and passed to the ventrolateral funiculus, the intermediate gray, and the dorsal gray commissure. Components of the pudendal nerve that innervate the anal and urethral sphincters were also labelled by injecting HRP into the respective sphincter muscles. Motoneurons innervating the anal and urethral sphincters were located in the dorsomedial and ventrolateral divisions, respectively, of Onuf's nucleus. Afferent projections from the two sphincters were similar; the most prominent terminations were present in the marginal zone, intermediate gray, and dorsal gray commissure. These results are discussed with respect to the physiological function of the pudendal nerve and its relationship with sacral autonomic pathways.
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PMID:Organization of afferent and efferent pathways in the pudendal nerve of the female cat. 247 17

Ulex europaeus agglutinin I (UEA-I) is a plant lectin with an affinity for L-fucosyl residues in the chains of lactoseries oligosaccharides associated with medium- and smaller-diameter dorsal root ganglion neurons and their axonal processes. These enter Lissauer's tract and terminate within the superficial laminae of the spinal cord overlapping projections known to have a nociceptive function. This implies that the surface coatings of neuronal membranes may have a relationship with functional modalities. The present investigation further examined this concept by studying a neuronal projection with a nociceptive function to determine whether fucosyl-lactoseries residues were incorporated in its primary afferent terminals. Transganglionic transport of horseradish peroxidase (HRP) following injection into tooth pulp chambers was employed to demonstrate dental pulp terminals in the trigeminal spinal complex, while peroxidase and fluorescent tags were used concomitantly to stain for UEA-I. Double immunolabeling for substance P (SP) and gamma-aminobutyric acid (GABA) using peroxidase and colloidal gold allowed a comparison of the distribution of a known excitatory nociceptive transmitter with that of UEA-I binding in specific subnuclei. Synaptic interrelationships between UEA-I positive dental pulp primary afferent inputs and specific inhibitory terminals were also examined. SP immunoreactivity occurred in laminae I and outer lamina II (IIo) of subnucleus caudalis (Vc) and in the ventrolateral and lateral marginal region of the caudal half of subnucleus interpolaris (Vi), including the periobex area in which Vi is slightly overlapped on its lateral aspect by cellular elements of Vc. The adjacent interstitial nucleus (IN) also showed an intense immunoreactivity for this peptide antibody. UEA-I binding displayed a similar distribution pattern in both Vc and Vi, but extended into lamina IIi and the superficial part of Lamina III in Vc. Dental pulp terminals were found to have a comparable distribution; however, many extended into the dorsal portion of the caudal half of Vi and the ventromedial quadrant of rostral Vi. Electron-microscopic analysis showed that transganglionically labeled dental pulp terminals contained ovoid, complex membrane-bound vacuoles laden with transported HRP. The preterminal axon and synaptic membranes of those dental pulp terminals located in zones of Vc and Vi displaying an affinity for UEA-I were usually characterized by a patchy, electron-dense coating of the peroxidase tag. SP was demonstrated ultrastructurally with Protein-A colloidal gold (3-nm particles), whereas GABA immunoreactivity was revealed by the avidin-biotin-peroxidase method.(ABSTRACT TRUNCATED AT 400 WORDS)
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PMID:Ulex europaeus agglutinin-I binding to dental primary afferent projections in the spinal trigeminal complex combined with double immunolabeling of substance P and GABA elements using peroxidase and colloidal gold. 247 97

The cells of origin of spinal neurons projecting to the thalamus, the midbrain, the reticular formation, and the cerebellum in the pigeon were studied with the method of retrograde transport of horseradish peroxidase (HRP). Only few spinal cells project up to the thalamus and to the tectum and their location is at the base of the dorsal horn (lamina V) and in the intermediate or ventral spinal grey matter (most contralateral). However, many cells in the dorsal column nuclei (including external cuneate nucleus) project up to these brain areas. Many spinal neurons project to the caudal brainstem and reticular formation. With medioventral injections of HRP labeled cells were found in lateral lamina I (bilateral) and laminae V-VIII (most contralateral) with a concentration in lateral lamina V/VI and lamina VIII. With dorsolateral brainstem injections there was a predominance of lamina I neurons, located bilaterally at the dorsolateral corner of the dorsal horn near Lissauer's tract. These results show that spinal cells, which in mammalian species project up to the thalamus, predominantly end in the caudal brainstem. Injections into the cerebellum disclosed that not only cells of Clarke's column but also sofar not known "spinal border cells", located dorsal to and in part intermingled with the motoneurons, are cells of origin of spinocerebellar tracts and that both groups of cells occur at the cervical and at the lumbar enlargement.
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PMID:Cells of origin of spinothalamic, spinotectal, spinoreticular and spinocerebellar pathways in the pigeon as studied by the retrograde transport of horseradish peroxidase. 272 10

The distribution of vasoactive intestinal polypeptide (VIP) was mapped by peroxidase immunocytochemistry in the spinal cords of seven Macaca fascicularis monkeys and two cats. The animals were perfusion fixed with different chemicals. Those that were perfused with either a Zamboni fixative or 5% acrolein had significantly greater immunoreactivity outside the sacral cords; those fixed with 4% paraformaldehyde had little in nonsacral regions. VIP-like immunoreactive (VIP) axons and terminals were found in the superficial dorsal horn, reticular nucleus of lamina V, intermediomedial nucleus, and lamina X at all levels from C2 to S4; a few axons and terminals were also seen in the ventral horn. Axons were found in Lissauer's tract at all levels, and axons appeared in the dorsolateral and ventrolateral white matter at midthoracic levels; in the lumbosacral cord the number and extent of axons in the lateral and ventral white matter increased progressively in a caudal direction. VIP neurons were identified in thoracic intermediate gray lateral to the central canal and in the intercalatus (IC) and intermediolateral (IML) nuclei. Electron microscopy of the VIP terminals in laminae I and II of the cervical cord revealed they contain small round vesicles and many large granular vesicles; some are glomerular terminals and most form asymmetrical synaptic contacts onto dendrites. These results indicate VIP is much more widely distributed in the spinal cord than previously thought; VIP may be associated with both visceral thoracic and lumbosacral afferents, and with other afferents in the cervical cord; VIP neurons are present in the thoracic intermediate gray; and VIP axons in the ventral and lateral white matter indicate that the spinal cord is supplied in part by VIP sources other than primary afferents.
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PMID:VIP terminals, axons, and neurons: distribution throughout the length of monkey and cat spinal cord. 352 16

Horseradish peroxidase (HRP) applied to one hypogastric nerve labelled sensory neurons in T11-L3 dorsal root ganglia (DRG) bilaterally and preganglionic neurons (PGN) in the spinal cord segments T13-L3. An average of 130 small DRG neurons were labelled per animal (male or female). These were concentrated in the L1 + L2 DRGs (92%). About 75% were located ipsilateral to the site of HRP application. Central projections from DRG neurons were noted throughout Lissauer's tract and in the marginal zones (medial and lateral) near the borders of Lissauer's tract. A short projection was also seen extending to the dorsolateral funiculus. More than 90% of the preganglionic neurons were located in segments L1 + L2. Most of these were found in the dorsal commissural nucleus (75%) and most of the remainder were located bilaterally in the intermediolateral columns. Somewhat more intermediolateral neurons were labelled on the ipsilateral side than on the contralateral side. There were a few intercalating neurons and a very few funicular cells. An average of 415 PGNs were labelled in the male animals and 110 in the females, demonstrating a strong sexual dimorphism. No dimorphism was found in the sensory components.
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PMID:Sexual dimorphism in sympathetic preganglionic neurons of the rat hypogastric nerve. 355 84

Following ventral root injury-filling with horseradish peroxidase at sacral spinal levels S1, S2, and S3, small fascicles of axons can be observed to enter the ventral portion of lamina I and arborize primarily in the dorsolateral region just medial to the tract of Lissauer (TL). Some axons enter the TL and turn in a rostrocaudal direction. Labeled axons studied by electron microscopy are both myelinated and unmyelinated, and terminals in lamina I contain round clear, and dense cored vesicles and contact smaller diameter dendrites and vesicle-containing elements. The concentration of these putative ventral root afferents appears to be largest in the S2 segment, with smaller numbers found within S1 and S3.
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PMID:Distribution and ultrastructure of ventral root afferents to lamina I of the cat sacral spinal cord. 358 40

The central projections of primary afferent fibers of the greater splanchnic nerve of the rat were investigated using the transganglionic horseradish peroxidase transport technique. In addition, the corresponding spinal ganglion cells and the preganglionic sympathetic neurons were demonstrated. For comparing visceral and somatic afferents, intercostal nerve afferents were labelled by the same technique. Splanchnic afferent dorsal root ganglion cells were found at segments T3 to T13 ipsilaterally, with the greatest density at T8 to T12. Labelled cells represented about 10%-15% of all neurons in the ganglia at maximal projection levels. They were randomly distributed within individual ganglia. The great majority were medium to small sized and round to slightly oval in shape. In the spinal cord, labelled visceral afferent axons were found maximally at T8 to T11, but could be detected in decreasing density up to T1 and down to L1. They were distributed over Lissauer's tract and the dorsal funiculus to a medial and lateral collateral pathway (MCP and LCP, respectively). The MCP, somewhat more prominent than the LCP, was destined primarily to clustered presumptive terminal fields in medial lamina I and outermost lamina IIa. Only a few axons continued further to laminae V and X. Splanchnic afferent axons, most likely derived from the MCP, formed a longitudinal bundle ventral to the central canal. The LCP consisted of more or less well-defined axon bundles emanating from the lateral Lissauer's tract and curving round the lateral edge of the dorsal horn and through the dorsolateral funiculus. Presumptive terminal sites of LCP axons are the lateral laminae I and IIa, the nucleus of the dorsolateral funiculus and the dorsal part of lamina V. A few LCP axons were seen in the vicinity of lateral dendrites of preganglionic sympathetic axons. Visceroafferent terminals were absent from laminae IIb-IV and VII. The possible consequences of the MCP/LCP duality for the central connections of splanchnic afferents are discussed. Some splanchnic afferents ascended to the gracile and cuneate nuclei, and rarely to the spinal trigeminal nucleus. These results fit into the general concept of visceroafferent terminal organization that has emerged during the last few years. Differences to other reports in the detailed arrangement of fibers and terminals are discussed. Somatoafferent cell bodies represented the vast majority of neurons in the respective spinal ganglia. Cell sizes encompassed the whole range from very small to very large without a clear predominance of one particular size class.(ABSTRACT TRUNCATED AT 400 WORDS)
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PMID:The central projections of primary afferent neurons of greater splanchnic and intercostal nerves in the rat. A horseradish peroxidase study. 370 72


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