@article {2247, title = {Assessment of Anti-tyrosinase, Antioxidant and Cytotoxic Activities of Trigonostemon reidioides Extracts on Mouse Fibroblast (L929) Cells}, journal = {Pharmacognosy Journal}, volume = {16}, year = {2024}, month = {April 2024}, pages = {302-306}, type = {Original Article}, chapter = {302}, abstract = {

Background: Trigonostemon reidioides (Kurz) Craib is a plant traditionally used for its whitening properties, although previous studies have reported some adverse effects associated with its use. Objectives: The objective of this study were to investigate the antityrosinase activity, antioxidant activity, and toxicity on Mouse Fibroblast (L929) Cells of the T. reidioides extracts. The antityrosinase activity was determined using the dopachrome method, while the antioxidant activity was evaluated using the DPPH method. The cytotoxicity was assessed using the MTT assay. Results: The results revealed that the ethanol extract exhibited strong antityrosinase activity, with an IC50 value of 5.38 μg/ml. Furthermore, Fraction 3 and Fraction 4, which were further separated from the ethanol extract, demonstrated high antioxidant activity, with IC50 values ranging from 1.65 to 2.10 μg/ml. The hexane extract, as well as Fraction 4 and Fraction 5, exhibited low toxicity, with IC50 values ranging from 11.82 to 40.12 μg/ml. Conclusions: These findings indicate that Fraction 4 and Fraction 5 of T. reidioides possess potent antityrosinase and antioxidant activities, while displaying low cytotoxicity against the mouse fibroblast (L929) cell line. Therefore, Fraction 4 and Fraction 5 hold considerable potential for further development as skin whitening agents derived from T. reidioides extracts.

}, keywords = {antioxidant activity, Antityrosinase activity, Cytotoxicity activity, Trigonostemon reidioides (Kurz) Craib}, doi = {10.5530/pj.2024.16.45}, author = {Issara Chummalee and Methin Phadungkit and Pornpun Laovachirasuwan} } @article {2127, title = {Total Phenolic and Flavonoid Contents, Anti-tyrosinase and Antioxidant Activities of Pachyrhizus erosus Extracts}, journal = {Pharmacognosy Journal}, volume = {15}, year = {2023}, month = {October 2023}, pages = {839-842}, type = {Research Article}, chapter = {839}, abstract = {

Background: The storage roots of Pachyrhizus erosus (PE) have been traditionally used as a skin whitening agent in Indonesia and are also consumed fresh in many Southeast Asian countries, including Thailand. However, research on the biological activities of PE is limited. Objective: This study aimed to measure the total phenolic and flavonoid contents and to test the anti-tyrosinase and antioxidant activities of PE extracts. The Folin-Ciocalteu colorimetric, the Aluminium chloride colorimetric, the DPPH scavenging, and the Dopachrome assays were used for the experiments. Results: The dichloromethane extract had the highest anti-tyrosinase activity (IC50= 2.08 {\textpm} 0.40 mg/mL), total flavonoid content (9.93 {\textpm} 0.02 mg QE/g extract), and antioxidant activity (IC50= 40 {\textpm} 0.02 μg/mL). The largest total phenolic concentration was found in the 80\% ethanol extract, albeit (11.97 {\textpm} 0.55 mg GAE/g extract). Conclusion: Based on its remarkable activities, the dichloromethane extract is recommended for future development in skinlightening products. The study{\textquoteright}s findings conclude that PE extracts may be used as an alternate source of antioxidants and anti-tyrosinase agents

}, keywords = {Anti-tyrosinase, Free radical scavenging., Pachyrhizus erosus, total flavonoid content, total phenolic content}, doi = {10.5530/pj.2023.15.160}, author = {Pornpun Laovachirasuwan and Methin Phadungkit} } @article {1192, title = {The Development of Phyllanthus emblica Extract in Ethosomes for Hair Loss Prevention}, journal = {Pharmacognosy Journal}, volume = {12}, year = {2020}, month = {June 2020}, pages = {905-910}, type = {Research Article}, chapter = {905}, abstract = {

Background: Hair loss is not a serious health problem but leads to decreased self- confidence, personality, and psychological problems. According to Thai traditional medical wisdom, Phyllanthus emblica has the property to prevent hair loss. Ethosomes are a drug delivery system, which can increase drug delivery to deep skin layers and enhance the effectiveness of the active ingredient. Objective: This research aims to develop ethosomes of Phyllanthus emblica extract with beneficial properties. Materials and Methods: Phyllanthus emblica was extracted by a maceration method with 95\% ethanol as a solvent. The total phenolic content of the extracts was determined using the Folin-Ciocalteu method. The antioxidation activity was evaluated by DPPH assay. Ethosomes were formulated by a cold method and their properties were observed. Results: The results showed that the total phenolic content of Phyllanthus emblica extract was 406.37{\textpm}2.39 mg GAE/g extract. The IC50 of antioxidant activity was 7.05{\textpm}0.17 μg/ml. Ethosomes with 0.03\% of Phyllanthus emblica extract, 2\% of soya phosphatidylcholine, and 20\% of ethanol had the highest percentage of entrapment efficiency (65.26\%{\textpm}1.80\%). The ethosomes of Phyllanthus emblica extract was the spherical shape and white colloid. The particle size, polydispersity index, zeta potential, and pH of ethosomes were 0.43{\textpm}0.00 μm, 0.44{\textpm}0.03, -10.40{\textpm}0.28 mV, and 4.06{\textpm}0.03, respectively. Conclusion: The ethosomes of Phyllanthus emblica extract had good properties and area possible alternative product for hair loss prevention.

}, keywords = {Entrapment efficiency, Ethosomes, Phyllanthus emblica}, doi = {10.5530/pj.2020.12.128}, author = {Pornpun Laovachirasuwan and Wutthichart Fuangbangluang and Atchariyaporn Phanichanaphan and Issarapong Nasomroop and Methin Phadungkit} }