Chemical profile of a polysaccharide from Psidium guajava leaves and it’s in vivo antitussive activity

Decoction of Psidium guajava leaves has been used as medication for chronic coughs and breathlessness for ages. Despite demonstration of antitussive activity, the specific molecule responsible for this remains unidentified. Herein, we report chemical profile and antitussive activity of its water ext...

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Published inInternational journal of biological macromolecules Vol. 109; pp. 681 - 686
Main Authors Khawas, Sadhana, Sivová, Veronika, Anand, Namrata, Bera, Kaushik, Ray, Bimalendu, Nosáľová, Gabriela, Ray, Sayani
Format Journal Article
LanguageEnglish
Published Netherlands Elsevier B.V 01.04.2018
Subjects
Antitussive activity
Polysaccharide molecular structure
Psidium guajava
Psidium guajava
Polysaccharide molecular structure
Antitussive activity
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Abstract Decoction of Psidium guajava leaves has been used as medication for chronic coughs and breathlessness for ages. Despite demonstration of antitussive activity, the specific molecule responsible for this remains unidentified. Herein, we report chemical profile and antitussive activity of its water extract (WE) and a polysaccharide (F1) present therein. This polysaccharide (F1), purified from WE by precipitation with ethanol and then through Cu(II)acetate, contains Ara, Gal, Rha, Glc and GalA residues, and has a molecular mass of 156 kDa. It comprises of terminal-, (1,5)- and (1,3,5)-linked Araf; (1,3)-, (1,6)- and (1,3,6)-linked Galp alongside (1,2)- and (1,2,4)-linked Rhap residues. Oligosaccharides indicating polysaccharide structure have been generated by Smith degradation and characterized. The WE fraction suppressed citric acid induced cough efforts in guinea pigs in the dose of 50 mg kg−1. Assessment of antitussive activity of fractions prepared from WE namely F1 (polysaccharide) and F2 (ethanol soluble fraction) revealed that polysaccharide is the active component. Remarkably, tested samples do not alter the specific airway smooth muscle reactivity in animals significantly. The simple extraction method, prominent activity and favorable reactions profile suggest that this macromolecule could be an antitussive drug candidate.
AbstractList Decoction of Psidium guajava leaves has been used as medication for chronic coughs and breathlessness for ages. Despite demonstration of antitussive activity, the specific molecule responsible for this remains unidentified. Herein, we report chemical profile and antitussive activity of its water extract (WE) and a polysaccharide (F1) present therein. This polysaccharide (F1), purified from WE by precipitation with ethanol and then through Cu(II)acetate, contains Ara, Gal, Rha, Glc and GalA residues, and has a molecular mass of 156 kDa. It comprises of terminal-, (1,5)- and (1,3,5)-linked Araf; (1,3)-, (1,6)- and (1,3,6)-linked Galp alongside (1,2)- and (1,2,4)-linked Rhap residues. Oligosaccharides indicating polysaccharide structure have been generated by Smith degradation and characterized. The WE fraction suppressed citric acid induced cough efforts in guinea pigs in the dose of 50 mg kg . Assessment of antitussive activity of fractions prepared from WE namely F1 (polysaccharide) and F2 (ethanol soluble fraction) revealed that polysaccharide is the active component. Remarkably, tested samples do not alter the specific airway smooth muscle reactivity in animals significantly. The simple extraction method, prominent activity and favorable reactions profile suggest that this macromolecule could be an antitussive drug candidate.
Decoction of Psidium guajava leaves has been used as medication for chronic coughs and breathlessness for ages. Despite demonstration of antitussive activity, the specific molecule responsible for this remains unidentified. Herein, we report chemical profile and antitussive activity of its water extract (WE) and a polysaccharide (F1) present therein. This polysaccharide (F1), purified from WE by precipitation with ethanol and then through Cu(II)acetate, contains Ara, Gal, Rha, Glc and GalA residues, and has a molecular mass of 156 kDa. It comprises of terminal-, (1,5)- and (1,3,5)-linked Araf; (1,3)-, (1,6)- and (1,3,6)-linked Galp alongside (1,2)- and (1,2,4)-linked Rhap residues. Oligosaccharides indicating polysaccharide structure have been generated by Smith degradation and characterized. The WE fraction suppressed citric acid induced cough efforts in guinea pigs in the dose of 50 mg kg−1. Assessment of antitussive activity of fractions prepared from WE namely F1 (polysaccharide) and F2 (ethanol soluble fraction) revealed that polysaccharide is the active component. Remarkably, tested samples do not alter the specific airway smooth muscle reactivity in animals significantly. The simple extraction method, prominent activity and favorable reactions profile suggest that this macromolecule could be an antitussive drug candidate.
Decoction of Psidium guajava leaves has been used as medication for chronic coughs and breathlessness for ages. Despite demonstration of antitussive activity, the specific molecule responsible for this remains unidentified. Herein, we report chemical profile and antitussive activity of its water extract (WE) and a polysaccharide (F1) present therein. This polysaccharide (F1), purified from WE by precipitation with ethanol and then through Cu(II)acetate, contains Ara, Gal, Rha, Glc and GalA residues, and has a molecular mass of 156 kDa. It comprises of terminal-, (1,5)- and (1,3,5)-linked Araf; (1,3)-, (1,6)- and (1,3,6)-linked Galp alongside (1,2)- and (1,2,4)-linked Rhap residues. Oligosaccharides indicating polysaccharide structure have been generated by Smith degradation and characterized. The WE fraction suppressed citric acid induced cough efforts in guinea pigs in the dose of 50 mg kg-1. Assessment of antitussive activity of fractions prepared from WE namely F1 (polysaccharide) and F2 (ethanol soluble fraction) revealed that polysaccharide is the active component. Remarkably, tested samples do not alter the specific airway smooth muscle reactivity in animals significantly. The simple extraction method, prominent activity and favorable reactions profile suggest that this macromolecule could be an antitussive drug candidate.
Author Bera, Kaushik
Anand, Namrata
Ray, Sayani
Nosáľová, Gabriela
Sivová, Veronika
Khawas, Sadhana
Ray, Bimalendu
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BackLink https://www.ncbi.nlm.nih.gov/pubmed/29274417$$D View this record in MEDLINE/PubMed
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Keywords Psidium guajava
Polysaccharide molecular structure
Antitussive activity
Language English
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Snippet Decoction of Psidium guajava leaves has been used as medication for chronic coughs and breathlessness for ages. Despite demonstration of antitussive activity,...
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SubjectTerms Antitussive activity
Polysaccharide molecular structure
Psidium guajava
Title Chemical profile of a polysaccharide from Psidium guajava leaves and it’s in vivo antitussive activity
URI https://dx.doi.org/10.1016/j.ijbiomac.2017.12.098
https://www.ncbi.nlm.nih.gov/pubmed/29274417
https://search.proquest.com/docview/1979962715
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