Effects of telmisartan on voltage-gated Kv1.3 and Kv1.5 potassium channels expressed in Xenopus oocytes / 中华心血管病杂志
Chinese Journal of Cardiology
;
(12): 165-168, 2009.
Article
in Chinese
| WPRIM
| ID: wpr-294755
ABSTRACT
<p><b>OBJECTIVE</b>To observe the effects of telmisartan on Kv1.3 and Kv1.5 potassium channels expressed in Xenopus oocytes.</p><p><b>METHODS</b>Kv1.3 and Kv1.5 potassium channel currents expressed in Xenopus oocytes were recorded and observed in the absence and presence of telmisartan using standard two-microelectrode voltage clamp techniques.</p><p><b>RESULTS</b>Telmisartan resulted in a concentration- and voltage-dependent inhibition effect on Kv1.3 channel current (IC(50) 2.05 micromol/L)and on Kv1.5 channel current (IC(50) 2.37 micromol/L).</p><p><b>CONCLUSIONS</b>Telmisartan blocks open-state Kv1.3 channel which could be one of the mechanisms related to its immunomodulatory and anti-atherosclerosis effect. Telmisartan also blocks open-state Kv1.5 channel which might partly account for its effect on reducing the incidence of atrial fibrillation.</p>
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Oocytes
/
Pharmacology
/
Xenopus
/
Benzimidazoles
/
Benzoates
/
In Vitro Techniques
/
Patch-Clamp Techniques
/
Metabolism
Limits:
Animals
Language:
Chinese
Journal:
Chinese Journal of Cardiology
Year:
2009
Type:
Article
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