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Digitalis: new actions for an old drug
J Andrew Wasserstrom1, Gary L Aistrup
1Dept. of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA. ja-wasserstrom@northwestern.edu
American Journal of Physiology. Heart and Circulatory Physiology
|October 13, 2005
Summary
Digitalis affects heart function through Na-K-ATPase (NKA) regulation of ions. New research reveals additional digitalis effects on cardiac cells, signaling, and long-term ion balance, impacting heart failure treatments.
Area of Science:
- Cardiology
- Molecular Biology
- Pharmacology
Background:
- Digitalis has been studied for decades for its effects on cardiac cell ion regulation via the Na-K-ATPase (NKA).
- Recent findings suggest broader digitalis actions on cardiac cell function, including intracellular signaling and ion balance.
Purpose of the Study:
- To review recent developments in digitalis research focusing on cardiac function.
- To explore new insights into digitalis's effects on intracellular ions, signaling pathways, and cardiovascular effects.
Main Methods:
- Literature review of recent studies on digitalis and cardiac function.
- Analysis of emerging data on NKA isoforms, intracellular signaling, and ionic regulation.
Main Results:
- Digitalis exhibits complex effects beyond NKA inhibition, influencing intracellular signaling and long-term ion homeostasis.
- Specific NKA isoforms and cellular locations are implicated in digitalis's diverse actions.
- New understanding of digitalis's role in both normal and diseased hearts is emerging.
Conclusions:
- Digitalis has multifaceted effects on cardiac cell function, impacting intracellular ion regulation and signaling.
- These findings have significant implications for understanding heart failure and developing new therapies.