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Toxicology and Industrial Health 2016-Apr

Antispasmodic and antidiarrheal activities of rhizomes of Polygonatum verticillatum maneuvered predominately through activation of K⁺ channels: Components identification through TLC.

Straipsnius versti gali tik registruoti vartotojai
Prisijungti Registracija
Nuoroda įrašoma į mainų sritį
Haroon Khan
Muhammad Saeed
Anwarul-Hassan Gilani
Naveed Muhammad
Najeeb Ur Rehman
Malik Hassan Mehmood
Nadeem Ashraf

Raktažodžiai

Santrauka

Polygonatum verticillatum has traditionally been used for various purposes. The present study was aimed to validate the antispasmodic and antidiarrheal properties of crude methanolic extract of rhizomes of P. verticillatum (PR). Isolated rabbit jejunum preparations were suspended in tissue baths to measure the isotonic responses using Power Lab data acquisition system for the antispasmodic activity of PR, while the antidiarrheal activity was conducted in vivo in mice. PR caused complete relaxation of the spontaneous contractions of isolated rabbit jejunum preparations in a dose-dependent mode. A complete inhibition was observed against low potassium (K(+); 25 mM)-induced contractions, while the plant extract partially inhibited the high K(+)(80 mM)-induced contractions. From a mechanistic point of view, the spasmolytic effect of PR against low K(+)was antagonized by glibenclamide similar to the effect of cromakalim, thus showing the presence of constituents in PR mediating spasmolytic activity predominantly through the activation of adenosine triphosphate-sensitive K(+)channels. When tested against castor oil-induced diarrhea in mice, oral administration of the plant extract manifested marked antidiarrheal activity at the doses of 500 and 1000 mg/kg similar to loperamide. This study provided a pharmacological basis for the medicinal use of PR in abdominal colic and diarrhea.

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