Identification of the calcium channel alpha 1E (Ca(v)2.3) isoform expressed in atrial myocytes.
Biochim Biophys Acta
; 1577(1): 17-26, 2002 Aug 19.
Article
en En
| MEDLINE
| ID: mdl-12151091
Antisense oligonucleotides targeting the calcium channel alpha 1E (Ca(v)2.3) subunit significantly inhibit the insulin-like growth factor-1 (IGF-1)-stimulated increase in low voltage-activated (LVA) (T-type) calcium current in cultured rat atrial myocytes [Proc. Natl. Acad. Sci. U.S.A. 94(1997) 14936]. As part of a continuing effort to understand the regulation of LVA current expression in the heart, we have identified the specific alpha 1E isoform that is expressed in atrial tissue. Through reverse transcription-polymerase chain reaction (RT-PCR), nine overlapping partial clones spanning the entire coding region of the cardiac alpha 1E mRNA were obtained. The predominate isoform in atrial tissue was identified and found to be highly homologous to the alpha 1E isoform previously isolated from kidney and the islets of Langerhans [Eur. J. Biochem. 257(1998) 274]. The expression of alpha 1E in the heart occurs specifically in cardiac myocytes and not in smooth muscle or fibroblasts as demonstrated by RT-PCR performed on isolated atrial myocytes and by in situ hybridization.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Canales de Calcio
/
Proteínas de Transporte de Catión
/
Atrios Cardíacos
/
Miocardio
Tipo de estudio:
Diagnostic_studies
/
Prognostic_studies
Límite:
Animals
Idioma:
En
Revista:
Biochim Biophys Acta
Año:
2002
Tipo del documento:
Article
País de afiliación:
Estados Unidos
Pais de publicación:
Países Bajos