@article {2462, title = {Anti-Tyrosinase, Anti-Inflammatory, and Cytotoxic Activity of Si Boo Gan Tang Rice and Rice Bran Extracts}, journal = {Pharmacognosy Journal}, volume = {17}, year = {2025}, month = {January 2025}, pages = {22-27}, type = {Original Article}, chapter = {22}, abstract = {

Si Boo Gan Tang is a widely cultivated variety of rice in the Tak Bai district of Narathiwat province, located in the southern region of Thailand. This study aimed to evaluate the biological properties of Si Boo Gan Tang rice and rice bran extracts, focusing on their anti-tyrosinase activity, anti-inflammatory activity, and cytotoxicity. The anti-tyrosinase assay revealed that the aqueous extract of rice (RW) significantly inhibited tyrosinase activity by 41.47\%. Similarly, the ethanolic extract of rice (RE) exhibited anti-tyrosinase activity at 35.34\%. The aqueous (RBW) and ethanolic (RBE) extracts of rice bran showed anti-tyrosinase activity with percentages of 19.26\% and 29.08\%, respectively. The anti-inflammatory experiment, conducted using RAW 264.7 cells, demonstrated that all extracts (RW, RBW, RE, and RBE) from rice and rice bran exhibited anti-inflammatory properties by reducing the release of nitric oxide (NO) from lipopolysaccharide (LPS)-stimulated RAW 264.7 cells. The extracts had IC50 values of over 400 μg/ml and CC50 values over 400 μg/ml. Cytotoxicity was assessed using the MTT assay on HaCaT cells. The findings indicated that the IC50 values for both aqueous and ethanolic extracts of rice and rice bran were greater than 800 μg/ml.

}, keywords = {Anti-inflammatory, Anti-tyrosinase, Cytotoxicity, HaCaT cell, Si Boo Gan Tang Rice}, doi = {10.5530/pj.2025.17.3}, author = {On-Anong Somsap and Wasinee Poonsawat and Ameena Benchamana and Anussara Kamnate and Gornganok Piboonpol and Wanita Pantong} } @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 {2246, title = {Boletus griseipurpureus Corner: Antibacterial, Antioxidant Properties and Phytochemical Compositions}, journal = {Pharmacognosy Journal}, volume = {16}, year = {2024}, month = {April 2024}, pages = {296-301}, type = {Original Article}, chapter = {296}, abstract = {

This study aims to investigate the properties of B. griseipurpureus Corner concerning its efficacy against various bacterial strains and its antioxidant capacity, along with its phytochemical composition. The antibacterial activity was evaluated using the agar well diffusion method, revealing pronounced efficacy against gram-negative bacteria, particularly noteworthy against E. coli ESBL182, known for its antibiotic resistance. The Minimum Inhibitory Concentration (MIC) and Minimum Bactericidal Concentration (MBC) of B. griseipurpureus Corner extract against E. coli ESBL182 were determined to be 75 and 300 mg/ml, respectively. The extract exhibited bacteriostatic activity by inhibiting cell growth, leading to a reduction in optical density at 600 nm. Additionally, examination of the supernatant from untreated and treated E. coli ESBL182 cells with B. griseipurpureus Corner extract indicated absorbance values of 0.088 and 0.248 at 260 nm, and 0.045 and 0.286 at 280 nm, respectively. Further investigation utilizing a scanning electron microscope revealed alterations in the morphology of treated cells, which displayed elongation and fragmentation, in contrast to untreated cells. The DPPH assay indicated that the IC50 of B. griseipurpureus Corner extract was 31.22 mg/ml. The IC50 value obtained from the ABTS assay was 47.31 mg/ml. Additionally, the FRAP assay revealed that the concentration of ascorbic acid equivalent in B. griseipurpureus Corner extract was 1.06 mg/g crude extract. Phytochemical analysis, conducted using a spectrophotometer at wavelengths of 750 nm and 510 nm, respectively, indicated phenolic and flavonoid contents of 0.22 mg gallic acid/g fresh weight and 3.23 mg quercetin/g fresh weight in the extract.

}, keywords = {Antibacterial activity, Antioxidant property, Boletus griseipurpureus Corner, Flavonoid compound, Phenolic compound, Phytochemical compositions}, doi = {10.5530/pj.2024.16.44}, author = {On-Anong Somsap and Anussara Kamnate and Amornrat Angajchariya} }