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Titolo:
Perineuronal nets ensheath fast spiking, parvalbumin-immunoreactive neurons in the medial septum/diagonal band complex
Autore:
Morris, NP; Henderson, Z;
Indirizzi:
Univ Leeds, Sch Biomed Sci, Leeds LS2 9NQ, W Yorkshire, England Univ Leeds Leeds W Yorkshire England LS2 9NQ S2 9NQ, W Yorkshire, England
Titolo Testata:
EUROPEAN JOURNAL OF NEUROSCIENCE
fascicolo: 3, volume: 12, anno: 2000,
pagine: 828 - 838
SICI:
0953-816X(200003)12:3<828:PNEFSP>2.0.ZU;2-L
Fonte:
ISI
Lingua:
ENG
Soggetto:
RAT CEREBRAL-CORTEX; BASAL FOREBRAIN NEURONS; CAT VISUAL-CORTEX; ACID DECARBOXYLASE-IMMUNOREACTIVITY; CHONDROITIN SULFATE PROTEOGLYCAN; CONTROL INHIBITORY INTERNEURONS; TERMINAL N-ACETYLGALACTOSAMINE; BINDING PROTEIN PARVALBUMIN; CHANNEL SUBUNIT KV3.1B; GABAERGIC NEURONS;
Keywords:
adaptation; immunofluorescence; intracellular recording; lectin; rat;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
83
Recensione:
Indirizzi per estratti:
Indirizzo: Henderson, Z Univ Leeds, Sch Biomed Sci, Worsley Bldg, Leeds LS2 9NQ, W Yorkshire, England Univ Leeds Worsley Bldg Leeds W Yorkshire England LS2 9NQ and
Citazione:
N.P. Morris e Z. Henderson, "Perineuronal nets ensheath fast spiking, parvalbumin-immunoreactive neurons in the medial septum/diagonal band complex", EUR J NEURO, 12(3), 2000, pp. 828-838

Abstract

Perineuronal nets, composed of extracellular matrix material, have previously been associated with parvalbumin-immunoreactive neurons in the medial septum/diagonal band (MS/DB) complex of the rat. The aim of this study was to correlate the presence of perineuronal nets with electrophysiological properties and parvalbumin immunoreactivity in MS/DB neurons. Intracellular recordings were made from cells in a brain slice preparation maintained in vitro, and neurons were characterized into four populations: (i) slow-firing neurons, (ii) burst-firing neurons, (iii) fast spiking neurons with narrow action potentials and a small degree of spike frequency adaptation, and (iv) regular spiking neurons with broader action potentials and a high degree of spike frequency adaptation. Following electrophysiological characterization, neurons were filled with biocytin, processed for parvalbumin immunoreactivity and stained for perineuronal nets using Wisteria floribunda lectin. The three substances were viewed with triple fluorescence. Fast spiking, nonadapting neurons, shown previously to contain parvalbumin immunoreactivity, were nearly all ensheathed by perineuronal nets. There was a population of small parvalbumin-immunoreactive neurons which did not possess perineuronal nets, and which were not encountered with the intracellular electrodes. The other three neuron types in the MS/DB did not contain parvalbumin immunoreactivity or perineuronal nets. In keeping with this neurochemical profile for electrophysiologically identified neurons, burst-firing neurons had action potential parameters more similar to those of regular spiking than of fast spiking neurons. We conclude that fast spiking neurons, presumed to be GABAergic septohippocampal projection neurons, are surrounded by supportive structures to enable the high level of neuronal discharge required for producing disinhibition of hippocampal pyramidal neurons.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/04/20 alle ore 03:00:55