Chronic stimulation of acetylcholine receptors: Differential effects on Na,K-ATPase isoforms in a myogenic cell line
✍ Scribed by Renee Kragenbrink; Sandra C. Higham; Steven C. Sansom; Thomas A. Pressley
- Publisher
- John Wiley and Sons
- Year
- 1996
- Tongue
- English
- Weight
- 809 KB
- Volume
- 23
- Category
- Article
- ISSN
- 0887-4476
No coin nor oath required. For personal study only.
✦ Synopsis
The myogenic cell line, C2CI2, expresses two isoforms of the Na,K-ATPase catalytic subunit (a1 and a21 following differentiation. Hyperpolarization in myotubes following long-term exposure to carbachol (Henning et al. (1993) Br. J. Pharmacol., 111:459-464) suggests that the activity of one or both of the isoforms is increased after chronic stimulation of the acetylcholine receptor. We have examined explicitly the abundance of the two isoforms following such a n exposure. Immunoblotting with specific antibodies did not detect any changes in the abundance of the a1 isoform after a 3-day exposure to carbachol(l0 pM). In contrast, there was a 50% increase in the abundance of a2. These results suggest that chronic stimulation of the acetylcholine receptor produced a differential effect on the abundance of the a isoforms. Na,K-pump, a Isoforms, CZCl2 Cells, Acetylcholine receptor