@article {1628, title = {Azadirachta indica (Neem) Water Leaf Extract Inhibits Melanin Production and Tyrosinase Activity in B16F10 Melanoma Cells}, journal = {Pharmacognosy Journal}, volume = {13}, year = {2021}, month = {July 2021}, pages = {1030-1035}, type = {Research Article}, chapter = {1030}, abstract = {

Introduction: Abnormal melanin production can cause pigmentary disorder such as hyperpigmentation. Finding a potent medicinal plants that can prevent pigment disorder. Objective: This study was to investigate the potential of leaf extract from Azadirachta indica var siamensis valeton to inhibit melanin formation or melanogenesis. Materials and Methods: A.indica leaf extract was tested for phenolic and flavonoid content assay. Tests using 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay were administered to determine the toxicity of A.indica leaf extract in B16F10 melanoma cells. Melanin content and tyrosinase activity assays were used to determine the potential for the inhibition of melanogenesis. Data was analyzed using SPSS. Results: It was found that A.indica leaf extract per gram has a total phenolic content of 28.73 {\textpm} 0.30 mg gallic acid equivalents and flavonoid of 12.48 {\textpm} 0.00 mg rutin equivalent. In addition, we found that these herbal extracts decreased the melanin content and intracellular tyrosinase activity in B16F10 melanoma cells without any toxicity. This study suggested that the melanin content and intracellular tyrosinase activity in B16F10 melanoma cells were decreased without any cytotoxicity by the A.indica leaf water extract. Conclusion: The findings demonstrated that A.indica leaf water extract inhibits melanin production through reducing tyrosinase activity. These results could be useful as a therapeutic treatment for skin hyperpigmentation disorders as well as an effective ingredient in whitening cosmetics.

}, keywords = {Azadirachta indica, Hyperpigmentation, Melanin, Melanogenesis, Tyrosinase}, doi = {10.5530/pj.2021.13.133}, author = {Thanitsara Songtavisin and Benjamart Pratoomthai and Warachin Gangnonngiw and Jarinyaporn Naowaboot} } @article {1678, title = {Effect of Aporosa villosa Stem Ethanolic Extract on Adipogenesis in 3T3-L1 Adipocytes}, journal = {Pharmacognosy Journal}, volume = {13}, year = {2021}, month = {November 2021}, pages = {1422-1427}, type = {Research Article}, chapter = {1422}, abstract = {

Background: An excessive fat accumulation is related to development of obesity. Obesity is associated with the induction of insulin resistance and diabetes mellitus conditions. Aporosa villosa is a plant that found in the Northern and Northeastern region of Thailand. Objective: The present study used 3T3-L1 adipocytes for investigating the effect of Aporosa villosa stem ethanolic extract (AS) on adipogenesis. Materials and Methods: 3T3-L1 adipocytes were used for measuring the cytotoxicity of AS at a concentration range of 3-100 μg/mL. After adipocyte cells treated with AS (3-100 μg/mL) for 8 days, the lipid accumulation was detected by Oil Red O staining and adipogenic gene expression were determined by quantitative real-time PCR. Results: AS extracts (3-100 μg/mL) did not show cytotoxicity on cell proliferation. After 8 days of treating 3T3-L1 adipocytes with AS at doses of 3, 10, 30 and 100 μg/mL, the lipid droplets were reduced as compared to non-treated cells. Furthermore, the adipogenic genes were measured. The regulators of adipogenesis, CCAAT/enhancer-binding protein α (C/EBPα), peroxisome proliferatoractivated receptor γ (PPARγ) and sterol regulatory element binding protein 1c (SREBP1c) were found decreasing in AS extracts. The downstream target genes of these regulators cluster of differentiation (CD) 36, fatty acid synthase (FAS) and lipoprotein lipase (LPL) were also reduced by AS treatments. Conclusion: These findings indicate that AS extract has an inhibitory activity on adipogenesis in 3T3-L1 adipocytes via suppressing C/EBPα, PPARγ and SREBP1c.

}, keywords = {Aporosa villosa; Adipogenesis; Obesity}, doi = {10.5530/pj.2021.13.180}, author = {Urarat Nanna and Linda Chularojmontri and Pholawat Tingpej and Rawiwun Kaewamatawong and Sudarat Homhual and Wanwisa Suwannaloet and Thanes Fuangfoo and Jarinyaporn Naowaboot} }