Journal
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
Volume 51, Issue 5, Pages 794-799Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ijbiomac.2012.07.015
Keywords
Medicinal plant; Lythrum salicaria; Glycoconjugate; Chemical analysis; Antitussive activity; Bronchodilatory activity
Funding
- Centre of Experimental and Clinical Respirology II
- EU sources - ERDF: European Regional Development Fund
- VEGA [1/0062/11, 1/0020/11, 2/0017/11]
- APVV [0125/11]
- Wroclaw University of Technology, Wroclaw, Poland
- Research and Development Operational programme [ITMS 26240120031]
- ERDF
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A high molecular mass polysaccharide-polyphenolic conjugate has been isolated from flowering parts of Lythrum salicaria by hot alkaline extraction. Its chemical analysis revealed 74% of carbohydrates and 17% of phenolics. Compositional analysis of carbohydrate part showed a high GalA content (49%), Rha (25%), Gal (13%) and Ara (9%) residues, and indicated thus rhamnogalacturonan associated with arabinogalactan in Lythrum conjugate. Antitussive activity tests, performed in three doses of Lythrum conjugate - 25, 50 and 75 mg/kg of animal body weight, showed the reduction of the number of cough efforts even 5 h after administration. However, their antitussive effects were lower in comparison with that of codeine, the strongest narcotic antitussive agent. The tests evaluating the influence of different doses on airways smooth muscle reactivity revealed more significant effect of Lythrum conjugate in comparison with that of salbutamol, a commercial bronchodilator used in a clinical practice. Measurements of specific airway resistance pointed at both, the dose-dependent bronchodilatory activity and possible participation of bronchodilation on antitussive effect of Lythrum conjugate. This study represents the first sight into pharmacodynamic properties of Lythrum polysaccharide-polyphenolic glycoconjugate. (C) 2012 Elsevier B.V. All rights reserved.
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