@article {2511, title = {Antimicrobial and Antioxidant Activities of Phanera aureifolia (K.Larsen \& S.S.Larsen) Bandyop., P.P.Ghoshal \& M.K.Pathak Leaf Ethanolic Extracts}, journal = {Pharmacognosy Journal}, volume = {17}, year = {2025}, month = {June 2025}, pages = {365-369}, type = {Research Article}, chapter = {365}, abstract = {

Introduction: Natural antioxidants and antimicrobial agents are abundantly found in medicinal plants. Objective: This study evaluated the antimicrobial and antioxidant activities of two colors from Phanera aureifolia (K.Larsen \& S.S.Larsen) Bandyop., P.P.Ghoshal \& M.K.Pathak leaf ethanolic extracts including gold and green leaves. Method: To assess antimicrobial efficacy, the agar well diffusion technique was analyzed. Scanning electron microscopy (SEM) was utilized to investigate the ultrastructural alterations in MRSA caused by leaf extracts. DPPH assay was used to assess antioxidant activity. The total amounts of phenolic compounds and flavonoids were evaluated through the Folin-Ciocalteu and aluminum chloride colorimetric techniques, respectively. The statistical analysis using an independent t-test. Results: Both extracts demonstrated activity against Pseudomonas aeruginosa TISTR146, Micrococcus luteus TISTR884, Staphylococcus aureus TISTR517 and Methicillin-resistant S. aureus 142 (MRSA142). Their activity against M. luteus TISTR884 was the highest observed. The MIC of both extracts against MRSA were 10 mg/ml. SEM analysis revealed that the cells exhibited noticeable enlargement and swelling compared to untreated MRSA cells. Extract from the green leaves of Gold leaf Bauhinia showed greater radical scavenging activity, higher total phenolic and flavonoid contents, compared to those from the golden leaves. Conclusions: The findings show that the extract from the green leaves of Gold leaf Bauhinia possess higher antioxidant potential compared to those from the golden leaves. In addition, both extracts exhibited antimicrobial activity, especially against MRSA.

}, keywords = {Antimicrobial activity, Antioxidant, Flavonoid compound, P.P.Ghoshal \& M.K.Pathak, Phanera aureifolia (K.Larsen \& S.S.Larsen) Bandyop., Phenolic compound}, doi = {10.5530/pj.2025.17.45}, author = {Gornganok Piboonpol and On-Anong Somsap and Wanita Panthong and Penporn Sujiwattanarat and Anussara Kamnate} } @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} }