Abstract |
E-721B and its aqueous extract were studied for its antiasthmatic effect in various experimental models using rats and guinea pigs. E-721B produced significant and dose-dependent inhibition of peritoneal mast-cell degranulation induced by compound 48/80 and egg- albumin in sensitised rats. The inhibition was comparable to that with disodium cromoglycate, ketotifen, and prednisolone. E-721B administered 2 h before the experiment and once daily for seven days significantly increased the preconvulsion time of acetylcholine and histamine aerosol-induced bronchospasm. It also significantly reduced mortality in guineapigs produced by egg albumin-induced anaphylactic shock and also reduced bronchoalveolar fluid eosinophil count in the same animals. E-721B significantly inhibited the acetylcholine and histamine-induced contraction of different isolated smooth muscle preparations from rats and guinea pigs. Contrary to these findings E-721B produced dose-dependent contraction of the rat anococcygeus muscle which was blocked by prazosin. Thus our observations establish the antiasthmatic potential of this herbal formulation.
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Authors | Gaurang B Shah, N S Parmar |
Journal | Phytotherapy research : PTR
(Phytother Res)
Vol. 17
Issue 9
Pg. 1092-7
(Nov 2003)
ISSN: 0951-418X [Print] England |
PMID | 14595594
(Publication Type: Journal Article)
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Copyright | Copyright 2003 John Wiley & Sons, Ltd. |
Chemical References |
- Anti-Asthmatic Agents
- E-721B
- Plant Extracts
- Histamine
- Acetylcholine
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Topics |
- Acetylcholine
- Anaphylaxis
(chemically induced, prevention & control)
- Animals
- Anti-Asthmatic Agents
(administration & dosage, pharmacology, therapeutic use)
- Bronchial Spasm
(chemically induced, prevention & control)
- Dose-Response Relationship, Drug
- Female
- Guinea Pigs
- Histamine
- Ileum
(drug effects)
- Male
- Mast Cells
(drug effects)
- Phytotherapy
- Plant Extracts
(administration & dosage, pharmacology, therapeutic use)
- Plants, Medicinal
- Rats
- Trachea
(drug effects)
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