@article {425, title = {Evaluation of Toxicological, Diuretic, and Laxative Properties of Ethanol Extract from Macrothelypteris Torresiana (Gaudich) Aerial Parts with In silico Docking Studies of Polyphenolic Compounds on Carbonic Anhydrase II: An Enzyme Target for Diuretic Acti}, journal = {Pharmacognosy Research}, volume = {10}, year = {2018}, month = {October 2018}, pages = {408-416}, type = {Original Article}, chapter = {408}, abstract = {

Background: Macrothelypteris torresiana (Gaudich) is a species of fern having a wide range of reputed medicinal properties for the treatment of inflammation, fever, renal failure, stomach problems, etc. Objective: The present investigation focused on the evaluation of toxicity profile and diuretic and laxative activities of ethanol extract from M. torresiana aerial parts (EEMTAP), with in silico docking studies of polyphenolic compounds on carbonic anhydrase (CA)-II, an enzyme target for diuretic activity. Materials and Methods: Acute and subacute toxicity was performed according to the Organization for Economic Co-operation and Development guidelines. EEMTAP at doses of 200, 400, and 600 mg/kg, p.o., employed for the assessment of diuretic and laxative activities with loperamide-induced constipation in Wistar albino rats. Furosemide (10 mg/kg, p.o.), agar-agar (300 mg/kg, p.o.), and sodium picosulfate (5 mg/kg, p.o) were used as reference standards, respectively, for activity comparison. During saluretic activity study, total urine volume, body weight before and after the experiment, and urinary levels of Na+, K+ (by flame photometry), and Cl- (by titrimetry) were estimated. Polyphenolic compounds such as caffeic acid and quercetin were successfully detected through chromatographic method of EEMTAP, and to rationalize the results obtained in diuretic activities, we carried out docking studies of the natural phenolic compounds against CA-II enzyme co-complexed with furosemide (Protein Data Bank ID: 1Z9Y CA-II in complex with furosemide as sulfonamide inhibitor). Results: In acute toxicity study, no mortality was observed at 2000 mg/kg, p.o., and in subacute toxicity study, the extract-treated group did not show any significant changes in body weight and organ weights. The hematological and biochemical parameters did not show any significant changes in the sample-treated groups when compared with the control group animals. The laxative activity of the extract was found to be in a dose-dependent increase in fecal output of rats at selected dose levels; similarly, EEMTAP significantly increased the urinary output as well as urinary electrolyte concentration in a dose-dependent manner. The molecular docking studies of phenolic compounds (caffeic acid and quercetin) into the binding site of CA II enzyme reveals that these analogues are having more favourable interaction when compared to the furosemide with better docking scores and hydrogen bonding interactions. Conclusion: The result demonstrated that the EEMTAP possesses a reasonable safety profile and shows promising diuretic and laxative activities in a dose-dependent manner.

}, keywords = {Diuretic, in silico docking studies, Laxative, Macrothelypteris torresiana, Toxicity}, doi = {10.4103/pr.pr_16_18}, author = {Sumanta Mondal and Naresh Panigrahi and Purab Sancheti and Ruchi Tirkey and Prasenjit Mondal and Sara Almas and Venu Kola} } @article {792, title = {Diuretic activity of Leaves of Plectranthus amboinicus (Lour) Spreng in Male Albino Rats}, journal = {Pharmacognosy Research}, volume = {2}, year = {2010}, month = {May 2010}, pages = {86-88}, type = {Original Article}, chapter = {86}, abstract = {

The shade-dried powder of leaves of Plectranthus amboinicus (Lour) Spreng was subjected to successive extraction using the various solvents (petroleum ether, chloroform, ethanol and water) in increasing order of polarity. The preliminary phytochemical analyses were carried out for all the extracts. The analyses of the leaves revealed the presence of alkaloids, carbohydrates, glycosides, proteins, amino acids, flavonoids, quinine, tannins, phenolic compounds and terpenoids. Since the phytoconstituents present in the ethanolic and aqueous extracts were similar, both the extracts were selected for further study. The diuretic properties of ethanolic and aqueous extracts were evaluated by determination of urine volume and electrolyte concentration in male albino rats. Furosemide (10 mg/kg) was used as standard while normal saline (0.9\%) was used as control. Both ethanolic and aqueous extracts (500 mg/kg) have shown significant increase in the volume of urine and urinary concentration of Na, K and Cl ions. Thus, from the is study it may be concluded that the leaves of P. amboinicus (Lour) Spreng possess diuretic activities.

}, keywords = {Diuretic, Electrolyte concentration, Plectranthus amboinicus}, doi = {10.4103/0974-8490.62956}, author = {Roshan Patel and Naveen K Mahobia and Ravindra Gendle and Basant Kaushik and Sudarshan K Singh} } @article {763, title = {Diuretic and Natriuretic activity of Two Mistletoe Species in Rats}, journal = {Pharmacognosy Research}, volume = {2}, year = {2010}, month = {March 2010}, pages = {50-57}, type = {Original Article}, chapter = {50}, abstract = {

In different cultural groups, the hemiparasitic plants of the families Loranthaceae and Viscaceae (mistletoes) are frequently used in the treatment of hypertension and/or as diuretic agents. However, it remains unclear as to what commonality makes them diuretic agents or a remedy for hypertension. In this article, the diuretic activity of methanol extracts of Viscum articulatum (VA) Burm. f. and Helicanthus elastica (HE) (Ders.) Dans. in rats is reported. The extracts were administered orally at doses of 100, 200 and 400 mg/kg to rats that had been fasted and deprived of water for 18 hours. Investigations were carried out for diuretic, saluretic and natriuretic effects. The polyphenolic and triterpenoid contents were determined quantitatively using chemical assays and high performance liquid chromatography (HPLC) analysis, respectively. The extracts of VA and HE demonstrated significant and dose-dependent diuretic activity in rats. It was found that while VA mimics the furosemide pattern, HE demonstrated a dose-dependent increase in diuresis, along with an increase in potassium-sparing effects. Phytochemical analysis revealed that polyphenolics and triterpenoids, such as oleanolic acid and lupeol, are the major phytochemicals involved. It was also found that in different combinations, these phytochemicals differed in the way they influenced the electrolyte excretion. A higher content of polyphenolics in association with lower triterpenoid content was found to favor potassium-sparing effects.

}, keywords = {Diuretic, Helicanthus elastic, Polyphenolics, Potassium sparing, Triterpenoids, Viscum articulatum}, doi = {10.4103/0974-8490.60576}, author = {Namita Jadhav and CR Patil and KB Chaudhari and JP Wagh and SJ Surana and RB Jadhav} }