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Intestinal, Airway, And Cardiovascular Relaxant Activities Of Thymoquinone, Muhammad Nabeel Ghayur, Anwar Hussain Gilani, Luke Jeffrey Janssen
Intestinal, Airway, And Cardiovascular Relaxant Activities Of Thymoquinone, Muhammad Nabeel Ghayur, Anwar Hussain Gilani, Luke Jeffrey Janssen
Department of Biological & Biomedical Sciences
Thymoquinone (TQ) is a bioactive component found in many medicinal herbs. In this study, we report the smooth and cardiac muscle relaxant activities of this compound. TQ concentration dependently suppressed spontaneously contracting rabbit jejunum while also relaxed high K+-(80 mM) induced contractions in jejunum and guinea-pig ileum, indicating activity at voltage-operated Ca++ channels (VOCC). Further, TQ displaced Ca++ concentration-response curves, obtained in a Ca++-free environment, to the right, showing blockade of VOCC. Similar activity was observed with verapamil, a standard VOCC blocker. TQ also exhibited nonadrenergic relaxation of agonist-induced contractions in guinea-pig trachea. When tested in fluo-4-loaded mouse lung slices, …