Sherry L. Stuesse
Northeast Ohio Medical University
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Brain Research | 1982
Sherry L. Stuesse
The origin of cardiac preganglionic neurons in the rat was investigated using the retrograde transport of horseradish peroxidase (HRP). A single injection of HRP was made into the right myocardium in either a sinoatrial or mid-ventricular location. Labeled cells were found in the mid- and lower medulla primarily in and around the nucleus ambiguous (NA) 600-1800 micrometers above the obex. The dorsal motor nucleus of X (DMN) was sparsely labeled and a few cells were found in an intermediate zone near the level of the obex. Labeling was bilateral with slightly heavier labeling found ipsilateral to the injection site than contralateral to it. Following a unilateral vagotomy, labeled cells were only found ipsilateral to the intact vagus. Atrial and midventricular injections yielded similar results. Occasionally only 1-2 cells in the NA were labeled per section. Inspection of serial sections revealed that in these sparsely labeled rats, the HRP was often in the same location within the NA forming a column of cells within the nucleus. The columns sometimes extended at least 240 micrometers in the rostral-caudal direction. The columnar organization was most apparent in rats with few labeled cells presumably because it was obscured in nuclei that were heavily labeled. In a second group of rats, the right vagus was cut at the cervical level and dipped in HRP to determine the extent of the NA and DMN in rats. In these animals, heavier labeling was found in the DMN than in the NA. Cells in the DMN were filled from the upper spinal cord to its most rostral extent 1200 micrometers above the obex. Thus, although the DMN and NA send projections in the vagus nerve, those axons terminating in the myocardium primarily originate in the NA.
Neuroscience Letters | 2000
Sherry L. Stuesse; William L.R. Cruce; John A. Lovell; Denise McBurney; Terriann Crisp
Nerve injury may lead to chronic neuropathic pain syndromes. We determined whether the extent of central nervous system microglial activation that accompanies nerve injury is age dependent and correlated with behavioral manifestations of pain. We used the Bennett and Xie sciatic nerve chronic constriction injury model (Bennett, G.J., Xie, Y.-K., A peripheral mononeuropathy in rat that produces disorders of pain sensation like those seen in man, Pain, 33 (1998) 87-107) to induce neuropathic pain in three age cohorts of Fischer 344 FBNF1 hybrid rats (4-6, 14-16, and 24-26 months). Rats were assessed for thermal sensitivity (hyperalgesia) of their hind paws pre-injury (day 0) and up to 35 days post injury. On various days post injury, the L4-L5 levels of their spinal cords were reacted for localization of an antibody to OX-42, a marker for microlgia. OX-42 immunoreactivity (ir) was quantified by use of a Bioquant density analysis system. OX-42 ir was heavy in areas of sciatic nerve primary afferent terminations and in the motor columns of its neurons. Aging increases OX-42 ir in the absence of injury. After injury, OX-42 ir increased further, but the increases over control levels decreased with age. Ligation-induced analgesia and hyperalgesia were both correlated with the increases in OX-42 ir, regardless of age.
Neuroscience Letters | 1984
E.P. Seiders; Sherry L. Stuesse
The brainstem location of afferent and efferent components in rat carotid sinus nerve (CSN) was determined by transecting the CSN and applying horseradish peroxidase. Afferent label was heaviest in the ipsilateral medial solitary nucleus ( mNTS ). Afferents were also found in the ipsilateral ventrolateral solitary nucleus, area postrema, and bilaterally in the commissural nucleus of the solitary complex. Efferent labeled cells were found in the ipsilateral rostral nucleus ambiguus and the inferior salivatory nucleus. The CSN afferents in the mNTS terminated rostral to neurons which project to the nucleus ambiguus thus implicating the existence of interneurons in the baroreceptor reflex pathway.
Pharmacology, Biochemistry and Behavior | 2001
Jill M. Tall; Sherry L. Stuesse; William L.R. Cruce; Terriann Crisp
A model of peripheral nerve injury was used to study gender differences in the development and progression of chronic constriction injury (CCI)-induced hyperalgesia and allodynia in male and female Fischer 344 FBNF1 hybrid rats. Rats were randomly assigned to one of the following treatment groups: (1) gonadally intact unligated males (male); (2) gonadally intact ligated males (male (CCI)); (3) castrated ligated males (male (CAS/CCI)); (4) gonadally intact unligated females (female); (5) gonadally intact ligated females (female (CCI)); and (6) ovariectomized ligated females (female (OVX/CCI)). A plantar analgesia meter and calibrated von Frey pressure filaments were used as the analgesiometric assays. In the absence of nerve injury, gonadally intact males responded significantly faster than females to a thermal nociceptive stimulus. The onset of the behavioral manifestations of unilateral ligation of the sciatic nerve did not differ as a function of sex or hormonal status (e.g., gonadally intact and gonadectomized male and female rats developed thermal hyperalgesia within 14 days post-CCI). Paw withdrawal latency (PWL) values of gonadally intact males returned to baseline control values after postligation day 14, whereas gonadally intact females, ovariectomized females and castrated males continued to elicit robust thermal hyperalgesic symptoms throughout the 35-day duration of the experiment. Allodynic responses to peripheral nerve injury were less variable across genders. These data suggest that the mechanisms underlying chronic nociceptive processing differ as a function of gender and gonadal hormone status.
Brain Behavior and Evolution | 1992
Sherry L. Stuesse; William L.R. Cruce
The central nervous system location of neurochemicals that are widely distributed among extant animals may give us clues to changes that occurred in the brains of these animals during evolution. We have been studying the brains of cartilaginous fishes, a heterogeneous group whose central nervous system varies considerably. Squalus acanthias, the spiny dogfish shark, was chosen to represent the squalomorphs, a group of living sharks known to possess many primitive characters. The distribution of tyrosine hydroxylase (TH+), serotonin (5-HT+), and leu-enkephalin (LENK+) positive cells within the brainstem of Squalus was determined by use of antibodies to these substances. All the major raphe groups described for mammals were found in Squalus. The 5-HT+ cells in raphe nuclei were more uniformly distributed in Squalus than in Heterodontus, the horn shark. Other nuclei that were 5-HT+ and LENK+, and that have been identified in mammals, included reticularis paragigantocellularis lateralis, a B9 cell group, and reticularis magnocellularis. The postcommissural nucleus and pretectal area contained 5-HT+ and LENK+ cells. These cells have been described in a holocephalian, in teleosts, and in reptiles but not in other elasmobranchs or in mammals. Cells that were TH+ were located in prominent A1/A2, A6 (locus coeruleus), A9 (substantia nigra), and A10 (ventral tegmental area) cell groups, and in a very small A5 group. We conclude that the variation in chondrichthian brainstems exceeds that in mammals, and we suggest that this variation is related to life-style and the long evolutionary history of these fishes.
Brain Research | 1991
Deyan Zeng; Sherry L. Stuesse
We compared the connections of two areas within rat cingulate cortex, the Cg1/Cg2 area vs the Cg3 area, by iontophoresing small quantities of wheatgerm agglutinin-horseradish peroxidase (WGA-HRP) into either of these two divisions and identifying afferent and efferent connections. Cortical projections were more widespread for the cingulate cortex (Cg3) area than for the Cg1/Cg2 area and included the dysgranular and agranular insular cortex, and perirhinal cortex. The Cg3 area received input from the CA1 layer of the hippocampus while the Cg1/Cg2 area was interconnected primarily with retrosplenial cortex. In the brainstem, both received input from Barringtons nucleus however, many of the subcortical connections of the two areas differed and supported the hypothesis that the Cg3 area is part of the limbic and visceral motor system while the Cg1/Cg2 area is more closely allied with somatic motor control. The Cg3 area received input from the basolateral nucleus of the amygdala, the supramammillary hypothalamic nucleus, the laterodorsal tegmental nucleus, and the lateral parabrachial nucleus. The Cg1/Cg2 area received input from the substantia nigra and targeted deep layers of the superior colliculus. Thus, rat cingulate cortex is a heterogeneous area that can be further subdivided into separate limbic/autonomic (Cg3) and somatic motor areas (Cg1/Cg2).
Neuroscience Letters | 2003
Terriann Crisp; Jennifer Giles; William L.R. Cruce; Denise McBurney; Sherry L. Stuesse
The effects of aging on the behavioral manifestations of neuropathic and inflammatory pain were investigated using two models of peripheral nerve injury. The left sciatic nerve of young and aged Fischer 344 FBNF1 hybrid rats (4-6 and 24-26 months old, respectively) was ligated using either the chronic constriction injury (CCI) model of Bennett and Xie or the partial sciatic nerve ligation (PSNL) model of Seltzer et al. A plantar analgesic meter was used to assess age-related differences in CCI- or PSNL-induced thermal hyperalgesia, and nerve injury-induced tactile-evoked allodynia was assessed with von Frey filaments. Aged animals subjected to the PSNL procedure developed a more vigorous and longer lasting thermal hyperalgesic response than did aged rats post-CCI. The CCI model incorporates a more prominent peripheral inflammatory component than the PSNL model. These data support the notion that the peripheral inflammatory response is diminished in aged rats.
The Journal of Comparative Neurology | 1999
Durriyyah Sharifah Hasan Adli; Sherry L. Stuesse; William L.R. Cruce
Over 30 nuclei have been identified in the reticular formation of rats, but only a small number of distinct reticular nuclei have been recognized in frogs. We used immunohistochemistry, retrograde tracing, and cell morphology to identify nuclei within the brainstem of Rana pipiens. FluoroGold was injected into the spinal cord, and, in the same frogs, antibodies to enkephalin, substance P, somatostatin, and serotonin were localized in adjacent sections. We identified many previously unrecognized reticular nuclei. The rhombencephalic reticular formation contained reticularis (r.) dorsalis; r. ventralis, pars alpha and pars beta; r. magnocellularis; r. parvocellularis; r. gigantocellularis; r. paragigantocellularis lateralis and dorsalis; r. pontis caudalis, pars alpha and pars beta; nucleus visceralis secundarius; r. pontis oralis, pars medialis and pars lateralis; raphe obscurus; raphe pallidus; raphe magnus; and raphe pontis. The mesencephalic reticular formation contained locus coeruleus‐subcoeruleus, r. cuneiformis, r. subcuneiformis, raphe dorsalis‐raphe centralis superior, and raphe linearis. Thus, the reticular formation of frog, which is an anamniote, is organized complexly and is similar to the reticular formation in amniotes. Because many of these nuclei may be homologous to reticular nuclei in mammals, we used mammalian terminology for frog reticular nuclei. J. Comp. Neurol. 404:387–407, 1999.
Somatosensory and Motor Research | 2001
William L.R. Cruce; John A. Lovell; Terriann Crisp; Sherry L. Stuesse
Substance P (SP) levels in the spinal cords of very old rats are less than the levels in younger rats (Bergman et al., 1996). After injury to a peripheral nerve in young rats, immunoreactivity (ir) to the SP receptor, NK-1 (neurokinin-1), increases in the spinal cord ipsilateral to the injury and the increases are correlated with the development of thermal hyperalgesia (Goff et al., 1998). Thus we postulated that aged rats might display an increased sensitivity to thermal stimulation before peripheral nerve injury and that they might respond differently to injury than do younger rats. To test this hypothesis, we used the Bennett and Xie model (1988) of chronic constriction injury (CCI) to the sciatic nerve to induce a neuropathic pain condition. We investigated the effect of age on changes in NK-1 ir in superficial layers of the dorsal horn and on numbers of NK ir cells in deeper laminae at the L4-L5 levels of the spinal cord after CCI. NK-1 receptors were tagged immunohistochemically and their distribution quantified by use of computer-assisted image analysis. NK-1 ir changes were related to alterations in thermal and tactile sensitivity that developed after CCI in young, mature and aged (4-6, 14-16, and 24-26 months) Fischer F344 BNF1 hybrid rats. No differences in thermal or tactile sensitivity of young and aged rats were seen in the absence of nerve injury. After injury, aged rats developed thermal hyperalgesia and tactile allodynia more slowly than did the younger rats. NK-1 receptor ir and numbers of NK-1 ir cells in the dorsal horn increased with time post-injury in all three groups. NK-1 ir increases were correlated with the development of thermal hyperalgesia in those rats that displayed hyperalgesia. However, some rats developed an increased threshold to thermal stimuli (analgesia) and that also was correlated with increases in NK-1 ir. Thus NK-1 ir extent, while correlated with thermal sensitivity in the absence of injury, is not a specific marker for disturbances in one particular sensory modality; rather it increases with peripheral nerve injury per se.Substance P (SP) levels in the spinal cords of very old rats are less than the levels in younger rats (Bergman et al., 1996). After injury to a peripheral nerve in young rats, immunoreactivity (ir) to the SP receptor, NK–1 (neurokinin-1), increases in the spinal cord ipsilateral to the injury and the increases are correlated with the development of thermal hyperalgesia (Goff et al., 1998). Thus we postulated that aged rats might display an increased sensitivity to thermal stimulation before peripheral nerve injury and that they might respond differently to injury than do younger rats. To test this hypothesis, we used the Bennett and Xie model (1988) of chronic constriction injury (CCI) to the sciatic nerve to induce a neuropathic pain condition. We investigated the effect of age on changes in NK-1 ir in superficial layers of the dorsal horn and on numbers of NK ir cells in deeper laminae at the L4-L5 levels of the spinal cord after CCI. NK-1 receptors were tagged immunohistochemically and their distribution quantified by use of computer-assisted image analysis. NK-1 ir changes were related to alterations in thermal and tactile sensitivity that developed after CCI in young, mature and aged (4-6, 14-16, and 24-26 months) Fischer F344 BNF1 hybrid rats. No differences in thermal or tactile sensitivity of young and aged rats were seen in the absence of nerve injury. After injury, aged rats developed thermal hyperalgesia and tactile allodynia more slowly than did the younger rats. NK-1 receptor ir and numbers of NK-1 ir cells in the dorsal horn increased with time post-injury in all three groups. NK-1 ir increases were correlated with the development of thermal hyperalgesia in those rats that displayed hyperalgesia. However, some rats developed an increased threshold to thermal stimuli (analgesia) and that also was correlated with increases in NK-1 ir. Thus NK-1 ir extent, while correlated with thermal sensitivity in the absence of injury, is not a specific marker for disturbances in one particular sensory modality; rather it increases with peripheral nerve injury per se.
Brain Behavior and Evolution | 1991
Sherry L. Stuesse; William L.R. Cruce; R. Glenn Northcutt
The distribution of cells which were immunohistochemically positive for leu-enkephalin (LENK+) or serotonin (5-HT+), two substances widely distributed in the reticular formation, was determined in two species of skates (Raja binoculata and Raja rhina) and a bat ray (Myliobatis californica). The Rajoids are closely related to the Rhinobatoids which contains Platyrhinoidis, an elasmobranch that does not have a nucleus raphe dorsalis. Myliobatis was chosen for an outgroup comparison. Most of the nuclei that were 5-HT+ were also LENK+. The greatest number of labeled cells was in the hypothalamus bordering the third ventricle and in the neurointermediate lobe of the pituitary. The mesencephalon was rich in cells in the ventral tegmental area bordering the red nucleus. In both genera, there were numerous 5-HT+ and LENK+ fusiform cells paralleling the ventral surface of the metencephalon and myelencephalon. These cells were located in several reticular nuclei but were especially prominent in nucleus reticularis (n.r.) pontis oralis, n.r. magnocellularis, and n.r. paragigantocellularis lateralis. The latter nucleus contained fewer LENK+ than 5-HT+ cells. In both genera, 5-HT+ and LENK+ cells were located in raphe pallidus, raphe obscurus, raphe magnus, raphe centralis superior, and raphe linearis. Minor differences in distribution of the remaining 5-HT+ and LENK+ cell groups were found, but these representative elasmobranchs lack a dorsal raphe nucleus which, in mammals, is the largest serotoninergic group.