@article {301, title = {Gas Chromatography-Mass Spectrometric Determination of Components of Leaves of Aegle marmelos and Psidium guajava and Seeds of Nigella sativa and Correlation with In vitro Antioxidant Activity}, journal = {Pharmacognosy Research}, volume = {10}, year = {2018}, month = {April 2018}, pages = {230-235}, type = {Short Communication}, chapter = {230}, abstract = {

Objective: The aim of this study is to analyze the volatile components of the leaves of Aegle marmelos, Psidium guajava, and seeds of Nigella sativa, using gas chromatography-mass spectrometric (GC-MS) and correlate with their in vitro antioxidant activity. Materials and Methods: Plant material was analyzed for heavy metal content (HMC), pesticide residue (PR), and the presence of microbes/ fungi. Following hydrodistillation, the volatile components (AM, PG, and NS) were subjected to GC-MS analysis and in vitro antioxidant assay (2,2-diphenyl-1-picrylhydrazyl). Results: The plant material passed the test for HMC, PR, microbial, and fungal contamination. Using GC-MS, the number of compounds identified in AM, PG, and NS were 62, 46, and 58, respectively. The antioxidant activity of AM, PG, and NS was 98.538\%, 98.955\%, and 97.755\%, respectively. Conclusion: GC-MS-based methods can be successfully utilized for phytochemical profiling and standardization of plant material.

}, keywords = {Aegle marmelos, Antioxidant activity, Gas chromatography-mass spectrometric, Nigella sativa, Psidium guajava, Volatile compounds}, doi = {10.4103/pr.pr_93_17}, author = {C. V. Jayachandran Nair and Sayeed Ahamad and Washim Khan and Varisha Anjum and Rajani Mathur} } @article {542, title = {Development and Validation of High-performance Thin-layer Chromatography Method for Simultaneous Determination of Polyphenolic Compounds in Medicinal Plants}, journal = {Pharmacognosy Research}, volume = {9}, year = {2017}, month = {December 2017}, pages = {s67-s73}, type = {Original Article}, chapter = {s67}, abstract = {

Context: Quantitative standardization of plant-based products is challenging albeit essential to maintain their quality. Aims: This study aims to develop and validate high-performance thin-layer chromatography (HPTLC) method for the simultaneous determination of rutin (Ru), quercetin (Qu), and gallic acid (Ga) from Psidium guajava Linn. (PG) and Aegle marmelos (L.) Correa. (AM) and correlate with antioxidant activity. Materials and Methods: The stock solution (1 mg/mL) of standard Ru, Qu, and Ga in methanol: Water (1:1) was serially diluted and spotted (5 μL) on slica gel 60 F254thin-layer chromatography plates. Toluene: Ethyl acetate: Formic acid: Methanol (3:4:0.8:0.7, v/v/v) was selected as mobile phase for analysis at 254 nm. Hydroalcoholic (1:1) extracts of leaves of PG and AM were fractionated and similarly analyzed. Antioxidant activity was also determined using 2, 2-diphenyl-1-picrylhydrazyl assay. Results: The developed method was robust and resolved Ru, Qu, and Ga at Rf0.08 {\textpm} 0.02, 0.76 {\textpm} 0.01, and 0.63 {\textpm} 0.02, respectively. The intra-day, interday precision, and interanalyst were \<2\% relative standard deviation. The limit of detection and limit of quantification for Ru, Qu, and Ga were 4.51, 4.2, 5.27, and 13.67, 12.73, 15.98 ng/spot, respectively. Antioxidant activity (Log 50\% inhibition) of PG and AM was 4.947 {\textpm} 0.322 and 6.498 {\textpm} 0.295, respectively. Conclusion: The developed HPTLC method was rapid, accurate, precise, reproducible, and specific for the simultaneous estimation of Ru, Qu, and Ga.

}, keywords = {Aegle marmelos, Gallic acid, Guercetin, High-performance thin-layer chromatography, Psidium guajava, Rutin}, doi = {10.4103/pr.pr_122_16}, author = {CV Jayachandran Nair and Sayeed Ahamad and Washim Khan and Varisha Anjum} } @article {541, title = {Development and Validation of High-performance Thin-layer Chromatography Method for Simultaneous Determination of Polyphenolic Compounds in Medicinal Plants}, journal = {Pharmacognosy Research}, volume = {9}, year = {2017}, month = {December 2017}, pages = {s67-s73}, type = {Original Article}, chapter = {s67}, abstract = {

Context: Quantitative standardization of plant-based products is challenging albeit essential to maintain their quality. Aims: This study aims to develop and validate high-performance thin-layer chromatography (HPTLC) method for the simultaneous determination of rutin (Ru), quercetin (Qu), and gallic acid (Ga) from Psidium guajava Linn. (PG) and Aegle marmelos (L.) Correa. (AM) and correlate with antioxidant activity. Materials and Methods: The stock solution (1 mg/mL) of standard Ru, Qu, and Ga in methanol: Water (1:1) was serially diluted and spotted (5 μL) on slica gel 60 F254thin-layer chromatography plates. Toluene: Ethyl acetate: Formic acid: Methanol (3:4:0.8:0.7, v/v/v) was selected as mobile phase for analysis at 254 nm. Hydroalcoholic (1:1) extracts of leaves of PG and AM were fractionated and similarly analyzed. Antioxidant activity was also determined using 2, 2-diphenyl-1-picrylhydrazyl assay. Results: The developed method was robust and resolved Ru, Qu, and Ga at Rf0.08 {\textpm} 0.02, 0.76 {\textpm} 0.01, and 0.63 {\textpm} 0.02, respectively. The intra-day, interday precision, and interanalyst were \<2\% relative standard deviation. The limit of detection and limit of quantification for Ru, Qu, and Ga were 4.51, 4.2, 5.27, and 13.67, 12.73, 15.98 ng/spot, respectively. Antioxidant activity (Log 50\% inhibition) of PG and AM was 4.947 {\textpm} 0.322 and 6.498 {\textpm} 0.295, respectively. Conclusion: The developed HPTLC method was rapid, accurate, precise, reproducible, and specific for the simultaneous estimation of Ru, Qu, and Ga.

}, keywords = {Aegle marmelos, Gallic acid, Guercetin, High-performance thin-layer chromatography, Psidium guajava, Rutin}, doi = {10.4103/pr.pr_122_16}, author = {CV Jayachandran Nair and Sayeed Ahamad and Washim Khan and Varisha Anjum} } @article {426, title = {Psidium guajava Linn. Leaf Extract Affects Hepatic Glucose Transporter-2 to Attenuate Early Onset of Insulin Resistance Consequent to High Fructose intake: An Experimental Study}, journal = {Pharmacognosy Research}, volume = {7}, year = {2015}, month = {June 2015}, pages = {166-175}, type = {Original Article }, chapter = {166}, abstract = {

Background: Insulin resistance (IR) is amalgam of pathologies like altered glucos metabolism, dyslipidemia, impaired glucose tolerance, non-alcoholic fatty liver disease, and associated with type-II diabetes and cardiometabolic diseases. One of the reasons leading to its increased and early incidence is understood to be a high intake of processed fructose containing foods and beverages by individuals, especially, during critical developmental years. Objective: To investigate the preventive potential of aqueous extract of Psidium guajava leaves (PG) against metabolic pathologies, vis-{\`a}-vis, IR, dyslipidemia, hyperleptinemia and hypertension, due to excess fructose intake initiated during developmental years. Materials and Methods: Post-weaning (4 weeks old) male rats were provided fructose (15\%) as drinking solution, ad libitum, for 8 weeks and assessed for food and water/fructose intake, body weight, fasting blood sugar, mean arterial pressure, lipid biochemistry, endocrinal (insulin, leptin), histopathological (fatty liver) and immunohistochemical (hepatic glucose transporter [GLUT2]) parameters. Parallel treatment groups were administered PG in doses of 250 and 500 mg/kg/d, po {\texttimes} 8 weeks and assessed for same parameters. Using extensive liquid chromatography-mass spectrometry protocols, PG was analyzed for the presence of phytoconstituents like Myrecetin, Luteolin, Kaempferol and Guavanoic acid and validated to contain Quercetin up to 9.9\%w/w. Results: High fructose intake raised circulating levels of insulin and leptin and hepatic GLUT2 expression to promote IR, dyslipidemia, and hypertension that were favorably re-set with PG. Although PG is known for its beneficial role in diabetes mellitus, for the first time we report its potential in the management of lifelong pathologies arising from high fructose intake initiated during developmental years.

}, keywords = {Fructose, Glucose Ttransporter-2, Insulin resistance, Leptin, Psidium guajava, Quercetin}, doi = {10.4103/0974-8490.151459 }, author = {R. Mathur and Shagun Dutta and T. Velpandian and S.R. Mathur} } @article {918, title = {A Study of the Anti-inflammatory Effect of the Leaves of Psidium guajava Linn. on Experimental Animal Models}, journal = {Pharmacognosy Research}, volume = {2}, year = {2010}, month = {November 2010}, pages = {313-317}, type = {Original Article}, chapter = {313}, abstract = {

Introduction : The aim is to study the anti-inflammatory effect of the ethanolic extract of the leaves of Psidium guajava (PGE) on experimental animal models. Materials and Methods : Fresh leaves were collected, air-dried, powdered, and percolated in 95\% ethanol. Acute toxicity test was done according to OECD guidelines. Four groups of animals of either sex, weighing 150-200g of the species Rattus norvegicus were taken for the study (n = 6). Group A was taken as control (3\% gum acacia in 10 mL/kg body weight), Group B as test group (PGE 250 mg/kg body weight), Group C as test group (PGE 500 mg/kg body weight), and Group D as standard (Aspirin 100 mg/kg body weight). The animals were studied for acute inflammation by Carrageenan-induced rat paw edema, subacute inflammation by Granuloma pouch method, and chronic inflammation by Freund{\textquoteright}s adjuvant-induced arthritis method. Statistical analysis was done by one-way analysis of variance followed by multiple comparison tests. Results : In acute inflammation, there was significant inhibition of paw edema in Groups B, C, and D in comparison with Group A (P \< 0.05). In subacute inflammation, there was significant inhibition of exudate formation in Groups B, C, and D in comparison to Group A (P \< 0.05). In chronic inflammation, there was significant inhibition of paw edema and inhibition of weight reduction in Groups B, C, and D compared with Group A. Downregulation of arthritis index was also significant in Groups B, C, and D in comparison with Group A (P \< 0.05). Conclusion : The ethanolic extract of PGE has significant anti-inflammatory activity.

}, keywords = {Anti-inflammatory, Arthritis, Carrageenan, Granuloma, Psidium guajava}, doi = {10.4103/0974-8490.72331}, author = {Sarmistha Dutta and Swarnamoni Das} } @article {906, title = {Screening of Psidium guajava Leaf Extracts for Antistress Activity in Different Experimental Animal Models}, journal = {Pharmacognosy Research}, volume = {1}, year = {2009}, month = {January 2010 }, pages = {359-366}, type = {Original Article}, chapter = {359}, abstract = {

Ethanolic extract of leaves of Psidium guajava was investigated on anoxia stress tolerance test in Swiss mice. The animals were also subjected to acute physical stress (swimming endurance test) and acute heat induced stress to gauge the antistress potential of the extract. Further to evaluate the antistress activity of Psidium guajava in chronic stress condition, fresh Wistar rats were subjected to cold restraint stress (4{\textdegree} for 2 h) for 10 days. Stimulation of hypothalamus pituitary adrenal axis in stressful condition alters plasma glucose, triglyceride, cholesterol, BUN and corticosterone levels. There is also alteration in the blood cell counts. Pretreatment with the extract significantly (P\<0.001) ameliorated the stress-induced variations in these biochemical levels and blood cell counts in both acute and chronic stress models. The extract treated animals showed increase in swimming endurance time and increase in anoxia tolerance time in physical and anoxia stress models respectively. Treatment groups also reverted back increase in liver, adrenal gland weights and atrophy of spleen caused by cold chronic stress and swimming endurance stress models. The results indicate that ethanolic extract of Psidium guajava has significant adaptogenic activity against a variety of biochemical and physiological perturbations in different stress models.

}, keywords = {Acute heat stress, Adaptogenic, Antistress, Cold restraint stress, Psidium guajava, Swimming stress}, doi = {Nil}, author = {Lakshmi B.V.S and Sudhakar M} }