The expression of mRNA coding for m2 subtype of muscarinic cholinergic receptors was assessed in dorsal root ganglia (DRG) of 15-day post-natal rats. Northern blot analysis on total RNA using a mixture of two different oligonucleotide probes, indicated the presence of a single prominent band of approximately 6.5 kb in rat DRG; a band of the same size was observed both in brainstem and cortex taken as positive controls. Analysis by RT-PCR of the mRNA coding for a region of the third cytoplasmic loop of m2 receptor showed a single signal both in rat DRG and hippocampus. In situ hybridization was then used to identify the neuronal subpopulations expressing the mRNA for M2. The transcripts were preferentially localized in medium–small neurons of the ganglion as well as in satellite cells surrounding the neuron cell body. Large neurons were usually negative. Finally, competition binding experiments, performed in the presence of []-quinuclidinyl benzilate (QNB) and methoctramine (a selective competitor for M2 receptors), demonstrated the presence of M2 receptor protein (Ki=100 nM), as previously observed in chick DRG. The preferential localization of M2 in medium–small neurons of the ganglion suggests the involvement of this receptor subtype in the transduction of nociceptive stimuli.

Expression of muscarinic m2 receptor mRNA in dorsal root ganglia of neonatal rat / Tata, Ada Maria; M. T., Vilarò; C., Agrati; Biagioni, Stefano; G., Mengod; Tocco, Gabriella. - In: BRAIN RESEARCH. - ISSN 0006-8993. - STAMPA. - 824:(1999), pp. 63-70.

Expression of muscarinic m2 receptor mRNA in dorsal root ganglia of neonatal rat

TATA, Ada Maria;BIAGIONI, Stefano;TOCCO, Gabriella
1999

Abstract

The expression of mRNA coding for m2 subtype of muscarinic cholinergic receptors was assessed in dorsal root ganglia (DRG) of 15-day post-natal rats. Northern blot analysis on total RNA using a mixture of two different oligonucleotide probes, indicated the presence of a single prominent band of approximately 6.5 kb in rat DRG; a band of the same size was observed both in brainstem and cortex taken as positive controls. Analysis by RT-PCR of the mRNA coding for a region of the third cytoplasmic loop of m2 receptor showed a single signal both in rat DRG and hippocampus. In situ hybridization was then used to identify the neuronal subpopulations expressing the mRNA for M2. The transcripts were preferentially localized in medium–small neurons of the ganglion as well as in satellite cells surrounding the neuron cell body. Large neurons were usually negative. Finally, competition binding experiments, performed in the presence of []-quinuclidinyl benzilate (QNB) and methoctramine (a selective competitor for M2 receptors), demonstrated the presence of M2 receptor protein (Ki=100 nM), as previously observed in chick DRG. The preferential localization of M2 in medium–small neurons of the ganglion suggests the involvement of this receptor subtype in the transduction of nociceptive stimuli.
1999
01 Pubblicazione su rivista::01a Articolo in rivista
Expression of muscarinic m2 receptor mRNA in dorsal root ganglia of neonatal rat / Tata, Ada Maria; M. T., Vilarò; C., Agrati; Biagioni, Stefano; G., Mengod; Tocco, Gabriella. - In: BRAIN RESEARCH. - ISSN 0006-8993. - STAMPA. - 824:(1999), pp. 63-70.
File allegati a questo prodotto
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/242072
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? 4
  • Scopus 22
  • ???jsp.display-item.citation.isi??? 21
social impact