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001-es BibID:	BIBFORM029520
Első szerző:	Polgár Erika
Cím:	Selective innervation of lamina I projection neurones that possess the neurokinin 1 receptor by serotonin-containing axons in the rat spinal cord / E. Polgár, Z. Puskár, C. Watt, C. Matesz, A. J. Todd
Dátum:	2002
ISSN:	0306-4522
Megjegyzések:	Axons containing serotonin descend from brainstem to spinal cord and are thought to contribute to stimulation-produced and opioid analgesia, partly by a direct inhibitory action of serotonin on projection neurones. The density of serotoninergic innervation is highest in lamina I, which contains many nociceptive projection neurones. Two sets of anatomical criteria have been used to classify lamina I projection neurones: somatodendritic morphology and presence or absence of the neurokinin 1 receptor. To test whether the strength of serotoninergic innervation of lamina I projection neurones was related to morphology or neurokinin 1 receptor expression, we used confocal microscopy to determine the density of serotoninergic contacts on 60 cells retrogradely labelled from the caudal ventrolateral medulla. The contact density on neurones with the neurokinin 1 receptor was variable, with some cells receiving heavy input and others having few contacts. However, on average they received significantly more contacts (5.64 per 1000 mikrom2 plasma membrane±0.47, S.E.M.) than neurones which lacked the receptor (2.49±0.36). Among the neurokinin 1 neurones, serotoninergic innervation density was not related to morphology. Since the majority of serotoninergic boutons in lamina I of rat spinal cord do not appear to form synapses, we carried out electron microscopy on three heavily innervated neurokinin 1 receptor-immunoreactive projection neurones. Symmetrical synapses were found at 89% of serotoninergic contacts. These results indicate that serotoninergic innervation of lamina I projection neurones in the rat spinal cord is related to expression of neurokinin 1 receptors, but not to morphology, and that (at least on heavily innervated neurones) most serotonin-containing boutons which are in contact form synapses.
Tárgyszavak:	Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:	Neuroscience. - 109 : 4 (2002), p. 799-809. -
További szerzők:	Puskár Zita Watt, C. Matesz Klára (1949-) (anatómus, neurobiológus) Todd, Andrew J.
Internet cím:	Intézményi repozitóriumban (DEA) tárolt változat DOI
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001-es BibID:	BIBFORM029803
Első szerző:	Polgár Erika
Cím:	Immunohistochemical localization of neurokinin-l receptor in the lumbar spinal cord of young rats : morphology and distribution / Erika Polgár, Péter Szűcs, László Urbán, Klára Matesz, István Nagy
Dátum:	1999
Megjegyzések:	The type and distribution of neurokinin-1 (NK-1) receptor-expressing neurones were studied in young (14-day-old) rats' lumbar spinal cord using pre-embedding immunohistochemistry. The heaviest immunoreactivity was observed in the middle part and lateral fourth of lamina I where the great majority of immunoreactive perikarya represented fusiform and multipolar cells. In lamina II the middle and medial part showed moderate immunoreactivity, most of the cells resembled stalked cells. In lamina III the labelled perikarya were evenly distributed, while those in lamina IV accumulated mainly in the lateral part. In both laminae most of the labelled neurones represented central cells, the rest of them belonged to the antenna-type cells with long dorsally directed dendrites penetrating the superficial laminae. The immunoreactivity in laminae V-VII was uniform and relatively weak. In lamina VIII the immunopositive perikarya were encountered only rarely while in lamina IX virtually all motoneurones showed weak immunoreactivity. Lamina X contained small, multipolar and fusiform labelled perikarya. In conclusion, we found that the general appearance of the NK-1 receptor immunostaining and the major type of NK-I receptor-expressing neurones were similar to that found previously in adult spinal cord. Using the same method as Brown and colleagues the number of labelled NK- 1 receptor immunoreactive cells was similar in young and adult animals except lamina I where the number of immunoreactive neurones was twice that in adults.
Tárgyszavak:	Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban egyetemen (Magyarországon) készült közlemény
Megjelenés:	Somatosensory and Motor Research. - 16 : 4 (1999), p. 361-368. -
További szerzők:	Szűcs Péter (1974-) (kutatóorvos) Urbán László (London, UK) Matesz Klára (1949-) (anatómus, neurobiológus) Nagy István (orvos)
Internet cím:	Intézményi repozitóriumban (DEA) tárolt változat
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