@article {2495, title = {Phytochemical Screening, Antioxidant Potential, and α-Glucosidase Inhibition of Causonis trifolia Leaf Extracts: A Solvent-Based Comparative Study}, journal = {Pharmacognosy Journal}, volume = {17}, year = {2025}, month = {April 2025}, pages = {164-170}, type = {Original Article}, chapter = {164}, abstract = {

Introduction: Medicinal plants are used in diabetes mellitus due to their proven minimal adverse effects in humans. Causonis trifolia leaves have been used as traditional medicine for various treatments. Objective: The aim of this research was to investigate the phytochemicals, the total flavonoid and phenolic content, and in-vitro antioxidant and antidiabetic activities of the extracts of C. trifolia leaves. Method: The leaves of C. trifolia were sequentially extracted with maceration in hexane, ethyl acetate, ethanol, and 50\% ethanol. Then, the C. trifolia leaf extracts were assessed for antioxidant activity by the DPPH and ABTS radical scavenging and FRAP assay. Total phenolic and flavonoid contents were determined by the Folin- Ciocalteu and aluminum chloride colorimetric methods, respectively. Antidiabetic activity was evaluated by determination of α-glucosidase inhibitory effect. Results: Preliminary phytochemical analysis of ethanol and 50\% ethanol extracts of C. trifolia leaves showed positive results for alkaloids, coumarin, tannins, saponins, cardiac glycosides, terpenoids, and steroids. The 50\% ethanol extract had the best antioxidant activities of the three antioxidant assays (p \< 0.05). The results revealed higher phenolic and flavonoid contents in 50\% ethanol extract than in the other extracts (p \< 0.05). Moreover, the 50\% ethanol extract exhibited the best potential as α-glucosidase inhibitors of all the extracts and acarbose (p \< 0.05). Conclusions: The results conclude that the C. trifolia leaves with 50\% ethanol as the solvent possessed the potential to extract the highest levels of phytochemical content and have potential antioxidant and α-glucosidase inhibitory activities for diabetic therapy.

}, keywords = {Antidiabetic, Antioxidant, Causonis trifolia, α-glucosidase}, doi = {10.5530/pj.2025.17.20}, author = {Patcharin Singdam and Anussara Kamnate and On-Anong Somsap and Ruhainee Tohkayomatee} } @article {1904, title = {In Silico Analysis and ADMET Prediction of Flavonoid Compounds from Syzigium cumini var. album on α-Glucosidase Receptor for Searching Anti-Diabetic Drug Candidates}, journal = {Pharmacognosy Journal}, volume = {14}, year = {2022}, month = {December 2022}, pages = {736-743}, type = {Original Article}, chapter = {736}, abstract = {

Background: One of the causes of death is diabetes. Anti-diabetic drugs currently available do not work optimally because some have been reported to have side effect and resistance. Objective: This study aimed to flavonoid compounds from Syzygium cumini var. album with the greatest anti-diabetic activity and lower toxicity than acarbose. Materials and Methods: This research is an in silico study of nine flavonoid compounds from Syzygium cumini var. album, starting with PASS online was used to predict the activity spectrum of substances, drug-likeness prediction using DruLiTo, ADMET prediction (absorption, distribution, metabolism, excretion, and toxicity) using pkCSM online. Molecular docking was carried out by the AutoDock 4.2.6 program on α-glucosidase targeting. Visualization is done with the Discovery Studio Visualizer software. Results: From the data obtained, D-(+)-Catechin has a high affinity for α-glucosidase with a free energy of binding (ΔG) -5.94 kcal/mol and an inhibition constant (Ki) of 44270 nm. Conclusion: Based on the results of the study, it can be concluded that the flavonoid compounds from Syzygium cumini var. album has the potential as a promising anti-diabetic drug candidate, where the best candidate is D- (+)-Catechin. However, further studies of flavonoid compounds from Syzygium cumini var. album are needed.

}, keywords = {Flavonoid., Molecular docking, PASS, Pharmacokinetics, α-glucosidase}, doi = {10.5530/pj.2022.14.161}, author = {Yanu Andhiarto and Suciati and Ersanda Nurma Praditapuspa and Sukardiman} } @article {1609, title = {Phytochemical Constituents and In vitro Antidiabetic and Antioxidant Properties of Various Extracts of Kenikir (Cosmos caudatus) Leaves}, journal = {Pharmacognosy Journal}, volume = {13}, year = {2021}, month = {July 2021}, pages = {890-895}, type = {Original Article}, chapter = {890}, abstract = {

Type 2 diabetes mellitus (T2DM) is one of the most common degenerative disorders. For therapeutic use, herbs are commonly used in Indonesia for T2DM treatment, one of them is (Cosmos caudatus) kenikir{\textquoteright}s leaves. In previous studies, kenikir{\textquoteright}s leaves have high antidiabetic and antioxidant activity. However, a comparison of antidiabetic activity from many extracts of kenikir{\textquoteright}s leave is remain unclear. This study will compare the antidiabetic and antioxidant properties of various kenikir{\textquoteright}s leave extract. Kenikir{\textquoteright}s leaves are extracted by maceration methods for three days using three different solvents: boiling water, 50\% ethanol, dan ethanol 100\%. Then, phenolic and flavonoid content will be measured, as well as antioxidant properties by DPPH radical scavenging activity assay, and antidiabetic properties by α-glucosidase inhibition assay, also LCMS/MS will be used to predict the compound from each extract. The result shows that 50\% ethanol extract has highest phenolic and flavonoid content than others. It also has significantly higher antioxidant (p\<0.05) and antidiabetic (p\<0.05) properties than others. Meanwhile, LCMS/MS result of 50\% ethanol extract predicts 6 chemical component, that quercetin is the most dominant compound. 50\% ethanol extract of kenikir{\textquoteright}s leaves is superior from other extracts on phenolic and flavonoid content, antioxidant properties, and antidiabetic properties.

}, keywords = {α-glucosidase}, doi = {10.5530/pj.2021.13.114}, author = {Muhamad Dea Firdaus and Nina Artanti and Muhammad Hanafi and Rosmalena} } @article {1102, title = {Antidiabetic Constituents from Helminthostachys zeylanica (L) Hook (Ophioglossaceae)}, journal = {Pharmacognosy Journal}, volume = {12}, year = {2020}, month = {March 2020}, pages = {223-226}, type = {Original Article}, chapter = {223}, abstract = {

Background: The roots of tunjuk langit (Helminthostacshys zeylanica) have been used traditionally in some villages in Indonesia, particularly in Riau Province. Objective: In this study we reported two flavonoids and their antidiabetic activity. Material and methods: Isolation of the metabolites was based on polarity fractionation method. Purification processes were conducted by vacuum liquid chromatography (VLC). Chemical structures were elucidated based on spectroscopy characteristics, including FTIR and 1D/2D NMR. Results: The isolated compounds were identified as ugonin J and K. The antidiabetic activity was measured by α-glucosidase inhibitor assay. The antidiabetic activity of ugonin J was found at IC50 273,13{\textpm}0,402 ppm and Ugonin K was found at IC50 138,21{\textpm}0,263 ppm (moderately active). Conclusion: Therefore this plant can be used traditionally as antidiabetic medicine.

}, keywords = {Antidiabetic, Helminthostacys zeylanica, Ophioglossaceae, α-glucosidase}, doi = {10.5530/pj.2020.12.33}, author = {Fania El Ridhasya and Novia Rahim and Muhammad Almurdani and Rudi Hendra and Hilwan Yuda Teruna} } @article {849, title = {ELISA Test on Cordia myxa L. Leaf Extract for alpha-Glucosidase Inhibitor}, journal = {Pharmacognosy Journal}, volume = {11}, year = {2019}, month = {February 2019}, pages = {358-361}, type = {Original Article}, chapter = {358}, abstract = {

Aimed: Determine the potential of Cordia myxa L. leaf on inhibited α-glucosidase. Material: ELISA Kit, Ethanol 96\%, Colomn Chromatography, n-hexane, ethyl acetate, Glocobay{\textregistered}.\  Method: Sample from Cordia myxa L. leaf extracted by ethanol 96\% then evaporated to get the sticky extract. The sticky extract of Cordia myxa L. leaf fractionated by column chromatography with n-hexane, n-hexane: ethyl acetate (90:10; 80:20; 75:25; 70:30; 65:35; 60:40; 55:45; 50:50) Assay: The fractions assayed by ELISA (Enzyme-Linked Immunosorbent Assay) with acarbose (Glucobay {\textregistered}) as the comparator. Result: The results showed that the n-hexane fraction is the highest potency on inhibited α-glucosidase with the noncompetitive mechanism. The IC50 of n-hexane fraction is 0.53 ppm been while the acarbose is 6.85 ppm. Conclusion: The n-hexane fraction of Cordia myxa L. leaf has the highest potency to use for possible decrease blood glucose level.

}, keywords = {Acarbose, Cordia myxa L., ELISA, IC50, α-glucosidase}, doi = {10.5530/pj.2019.11.54}, author = {Ahmad Najib and Aktsar Roskiana Ahmad and Virsa Handayani} } @article {1006, title = {In vitro Antioxidant Properties and α-Glucosidase Inhibition of Combined Leaf Infusions from Psidium guajava L., Syzygium polyanthum L., and Annona muricata L.}, journal = {Pharmacognosy Journal}, volume = {11}, year = {2019}, month = {October 2019}, pages = {1269-1277}, type = {Original Article}, chapter = {1269}, abstract = {

Introduction: Guava (P. guajava), bay (S. polyanthum), and soursop (A. muricata) known as natural medicine. Limited report is available on their antioxidant and α-glucosidase inhibitory activities of leaf infusion. The aims of this research were to compare the antioxidant and α-glucosidase inhibitory activities of leaf infusion from guava, bay, and either as individual or combined infusions, and to analyze the chemical composition of the leaf infusion. Methods: Air dried leaf powder of guava, bay and soursop were infused separately with boiled aquadest. The infusions were analyzed for their antioxidant activity against DPPH. The α-glucosidase inhibitory assay was conducted against α-glucosidase from Saccharomyces cerevisiae. Then the infusions scanned with UV-Vis spectroscopy and analyzed with LC-MS. The synergism activities of the combined infusion were measured. Results: Antioxidant activities of leaf infusions of guava and bay showed a comparable result IC50 12.53 {\textpm} 0.55 and 10.76 {\textpm} 0.20 μg GAE/mL, but the infusion of soursop showed lower (IC50 19.77 {\textpm} 0.35 μg GAE/mL) than BHT as positive control (11.6 {\textpm} 0.31 μg GAE/mL). If soursop infusion was not added, then the mixture of the guava and bay infusion showed an antioxidative synergistic effect. The α-glucosidase inhibitory activities of the guava, bay and soursop infusion (0.083 {\textpm} 0.01; 0.025 {\textpm} 0.007; 0.533 {\textpm} 0.039 μg GAE/mL, respectively) were stronger than acarbose (1285 {\textpm} 148 μg/mL). The α-glucosidase inhibitory activities of the combined infusions showed a synergistic effect. The main constituents of the guava infusion were identified tentatively as chrysin and caffeoylquinic acid, for the bay infusion it was caffeoylquinic, and for the soursop infusion it was luteolin. Conclusions: There is a significant synergism of antioxidant activity of Guava and Bay mixture. The combined infusion of Bay and Soursop or Guava and Soursop showed antagonistic effect.

}, keywords = {Anonna muricata, Leaf infusion, Psidium guajava, Synergism, Syzygium polyanthum, α-glucosidase}, doi = {10.5530/pj.2019.11.197}, author = {Ika Rahayu and Pamela Hendra Heng and Kris H Timotius} } @article {540, title = {Antioxidative Properties of Blighia sapida K.D. Koenig Stem Bark Extract and Inhibitory Effects on Carbohydrate Hydrolyzing Enzymes Associated with Non-Insulin Dependent Diabetes Mellitus}, journal = {Pharmacognosy Journal}, volume = {10}, year = {2018}, month = {January 2018}, pages = {376-383}, type = {Original Article}, chapter = {376}, abstract = {

Background and Aim: In Africa, the fruit, seed, leaf, and stem of Blighia sapida K.D. Koenig are used as remedy for a range of diseases. This study characterized the phytochemicals, assessed the antioxidant and inhibitory properties of the stem bark of Blighia sapida. Materials and Methods: Samples were consecutively extracted using ethanol solvent and investigated for phenol content, DPPH radical scavenging abilities, iron chelation, reducing power, \α-amylase and \α-glucosidase activities as markers of in vitro anti-diabetic activities. Phytochemicals were analyzed using gas chromatography-mass spectrometry (GC-MS) analysis. Results: The extract had radical scavenging capabilities, iron chelation and reducing power. Furthermore, the results reveal the extract had considerably high \α-glucosidase and \α- amylase inhibitory activities as the concentration increases with IC50 values of 4.17 \± 0.24 mg/mL and 5.30 \± 1.25 mg/mL, respectively. Enzyme kinetic studies indicated that the extract displayed uncompetitive inhibitor for \α-glucosidase and was a competitive inhibitor of \α-amylase. The ethanolic extract is rich in several aromatic phenolic compounds and long chain aliphatic acids. Conclusion: These results reveal the bark possessed antioxidant as well as \α -glucosidase and \α -amylase inhibitory activities.

}, keywords = {Antidiabetic, antioxidant activity, Blighia sapida K D Koenig, α-amylase, α-glucosidase}, doi = {10.5530/pj.2018.2.63}, url = {http://fulltxt.org/article/494}, author = {Oluwafemi Adeleke Ojo and Basiru Olaitan Ajiboye and Oluwatosin Debbie Imiere and Oluwatosin Adeyonu and Israel Olayide and Adewale Fadaka} } @article {772, title = {Inhibitory Actions of Lagerstroemia speciosa (L.) Pers. Aqueous and Ethanolic Leaf Extracts against Carbohydrate-digesting Enzymes}, journal = {Pharmacognosy Journal}, volume = {10}, year = {2018}, month = {November 2018}, pages = {s113-s118}, type = {Original Article}, chapter = {s113}, abstract = {

Context: The leaves of Lagerstroemia speciosa (L.) Pers. (banaba) have been consumed traditionally in several Southeast Asian countries for the treatment of diabetes mellitus. The plasma glucose lowering actions of this medicinal plant were proposed to be linked with several mechanisms of action. However, its inhibitory actions against \α-amylase and \α-glucosidase, which play a major role in the regulation of postprandial plasma glucose, have not been clearly established. Aims: This study thus aimed to investigate the effects of Lagerstroemia speciosa (L.) Pers. aqueous and ethanolic leaf extracts (LSA and LSE extracts, respectively) on in vitro carbohydrate-digesting enzyme activities and enzyme kinetics. Settings and Design: In vitro carbohydrate-digesting enzyme activity assay. Materials and Methods: The activities of \α-amylase and \α-glucosidase were indicated by the amounts of maltose and p-nitrophenol generated in the reactions, respectively. Statistical analysis used: The data were analysed by using one-way ANOVA, followed by Bonferroni post-hoc test. Results: The LSA extract significantly inhibited both \α-amylase and \α-glucosidase enzymes with the IC50s of 1.21\±0.16 and 49.71\±0.86 \μg/mL, respectively. Meanwhile, the LSE extract selectively inhibited \α-amylase activity (IC50 = 22.21\±4.00 \μg/mL) with no apparent inhibition against \α-glucosidase activity. Both LSA and LSE extracts inhibited \α-amylase enzyme in a mixed inhibition manner whilst the LSA extract also acted as a mixed inhibitor against \α-glucosidase enzyme. The extracts possessed higher binding affinities toward the enzymes, indicated by the lower Ki values, when compared to acarbose (positive control). Conclusion: These results suggest the potential use of the extracts for a control of postprandial plasma glucose.

}, keywords = {Diabetes mellitus, Lagerstroemia speciosa (L.) Pers., α-amylase, α-glucosidase}, doi = {10.5530/pj.2018.6s.22}, author = {Wanwisa Khunawattanakul and Passakorn Boonma and Ronnarit Kampetch and Achida Jaruchotikamol and Benjamart Cushnie and Sakulrat Rattanakiat and Pawitra Pulbutr} } @article {328, title = {Alpha-Glucosidase Inhibitory Activity and Fractionation of Bioactive Compounds from bark Extracts of Sibucao (Caesalpinia sappan L.) In the Philippines}, journal = {Pharmacognosy Journal}, volume = {9}, year = {2017}, month = {April 2017 }, pages = {356-360}, type = {Original Article}, chapter = {356}, abstract = {

Diabetes is a chronic disease that affects millions of people around the world. Although conventional medicine is available, it is usually accompanied by serious side effects such as gastrointestinal problem. Thus, the search for alternative medicine from natural sources is of primary importance. Context: The study is concerned with Caesalpinia sappan L. found in the vicinity of Baybay City, Leyte Philippines. Furthermore, it deals with ethanolic and aqueous extracts of the bark only. It was conducted to determine the alpha-glucosidase inhibitory activity of C. sappan to provide evidence to support its efficacy as a folkloric medicinal plant. Aims: This work aimed to evaluate the alpha-glucosidase inhibitory activity of aqueous and ethanolic bark extracts of Sibucao (Caesalpinia sappan L.) and to partially fractionate its bioactive compounds. Settings and Design: Extracts were prepared in increasing concentration to get IC50 values. Samples were analysed in triplicate both for extracts and fractions collected from chromatography. Methods and Material: Caesalpinia sappan L. bark samples were collected from the vicinity of Visayas State University. Plant materials were dried, weighed and stored. Aqueous and ethanolic bark extracts were prepared using water and 20\% ethanol. The total phenolic content of the extracts were determined and the \α-glucosidase inhibitory activity of crude bark and aqueous extracts were measured using the method of Kim et al., 2011. Partial fractionation of bioactive compounds was done successively using gradient elution. The \α-glucosidase inhibitory activity of fractions were then determined and Rf values of active compounds were measured using thin layer chromatography (TLC). Results: Results revealed that aqueous extract (2000 ppm) and ethanolic extract (2000 ppm) show high \α-glucosidase inhibitory activity of 100\% and 59\% respectively. IC50 values of aqueous and ethanolic extract were found to be 300.52 \± 1.467 ppm and 1560.81 \± 2.582 ppm, respectively. TLC of fractions show 7 peaks for aqueous extract and 6 peaks for ethanolic extract in which compound with Rf value 0.70 had the highest inhibitory activity of 65\%. Conclusions: Taken together, the high \α-glucosidase inhibitory activity of aqueous extracts support the effectiveness of C. sappan L. bark decoctions. In addition, results from bioassay-guided fractionation can be used as an effective tool for further isolation and characterization of \α-glucosidase inhibitors from Caesalpinia sappan L. in the Philippines.

}, keywords = {Caesalpinia sappan, Flavonoids, Fractionation, Type II diabetes, α-glucosidase}, doi = {10.5530/pj.2017.3.60}, url = {/files/PJ-9-3/10.5530pj.2017.3.60}, author = {Ea Kristine Clarisse B. Tulin and Ma Theresa P. Loreto and Edgardo E. Tulin} } @article {348, title = {Fractionation and α-glucosidase Inhibitory Activity of Fractions from Garcinia hombroniana Pierre Leaves Extracts}, journal = {Pharmacognosy Journal}, volume = {9}, year = {2017}, month = {May 2017}, pages = {488-492}, type = {Original Article}, chapter = {488}, abstract = {

Background: Diabetes mellitus become one of the biggest global health problems of the 21st century. Type 2 diabetes play role for the majority of cases of diabetes worldwide which is characterized by the increase of postprandial blood glucose level. Maintaining postprandial glucose level through inhibition of \α-glucosidase is one of the essential strategies in the treatment of diabetes. Inhibitory effect of \α-glucosidase was commonly used to identify active compounds potentially to treat diabetes. Natural resources have potency as antidiabetic that can be used in diabetes treatment. Objective: The objective of the study is to separate active fraction in the crude extract of Garcinia hombroniana leaves to facilitate obtaining a pure biologically active compound as the \α-glucosidase inhibitor. Methods: Fractionation to separate active fraction was performed using column and thin layer chromatography methods while \α-glucosidase inhibitory activity assay was performed in vitro using spectrophotometric methods at \λ 400 nm. Results: Ethyl acetate and methanol extract of G. hombroniana yielded 14 and 12 fractions, respectively. Two fractions with the higher percent inhibition compared to other factions are fraction 8 from ethyl acetate extract (FEA8) and fraction 3 from methanol extract (FM3). The IC50 values of FEA8, FM3 and acarbose are 16.370 \μg/mL, 59.042 \μg/mL, and 39.534 \μg/mL respectively. Conclusion: Fraction 8 from ethyl acetate extract of G. hombroniana leaves (FEA8) was separated and known in this study as the most bioactive \α-glucosidase inhibitor agent compared with another extract, fractions, and acarbose.

}, keywords = {Column chromatography, Diabetes mellitus, Fractionation, Thin layer Chromatography, α-glucosidase}, doi = {10.5530/pj.2017.4.79}, url = {/files/PJ-9-4/10.5530pj.2017.4.79}, author = {Nita Triadisti and Rani Sauriasari and Berna Elya} }