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Background: Curcuma longa (Zingiberaceae), Azadirachta indica (Meliaceae), Psoralea corylifolia (Fabaceae), Pongamia pinnata (Fabaceae), and Woodfordia fruticosa (Lythraceae) stand as renowned medicinal plants in India. Traditionally, different parts of these plants have been employed for healing, particularly in the context of treating psoriasis and various other ailments. This catalyzed our investigation into the potential antipsoriatic properties of these botanicals. Objectives: We set out to evaluate the preliminary phytochemical analysis and in vitro antipsoriatic capabilities of acetone, ethanol, and water extracts derived from Curcuma longa, Azadirachta indica, Psoralea corylifolia, Pongamia pinnata, and Woodfordia fruticosa. Materials and Methods: The antipsoriatic potential of these extracts was assessed through the MTT assay, using HaCaT cells. Additionally, we conducted LDH assays and utilized confocal microscopy to gain further insights. Results: Our investigations unveiled the promising antiproliferative activity of these plants on skin keratinocytes. Notably, compounds A, B, and C demonstrated a significant decrease in cell viability compared to the control group. In contrast, compounds D and E did not exhibit significant differences compared to the control. Discussion and Conclusion: These findings substantiate the traditional uses of these plants in the treatment of psoriasis and underscore their potential as valuable resources in the quest for effective antipsoriatic treatments. [ABSTRACT FROM AUTHOR]

Context: Phyllanthus simplex Retz. (Phyllanthaceae), Crotolaria juncea Linn. (Leguminosae), Leucas aspera Linn. (Lamiaceae), and Vitex glabrata R.Br. (Verbenaceae) are well-known Indian medicinal plants. Different parts of these plants are used for healing purposes traditionally in the treatment of psoriasis and various other disorders. This prompted us to assess the antipsoriatic activities of these plants., Objectives: Petroleum ether and ethanol extracts of the selected plants, i.e., P. simplex (whole plant), C. juncea (seeds), L. aspera (aerial parts), and V. glabrata (leaves) were investigated for their in vitro antipsoriatic activity., Materials and Methods: Antipsoriatic activity of the extracts was evaluated by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay, using HaCaT cells. About 200 µl of different concentrations (25, 50, 100, 200, and 400 µg/ml) of test samples were prepared in the cell culture medium and incubated for 24 h before MTT assay to determine the viable cells. The effect of these extracts on nitric oxide (NO) production and lipid peroxidation was also evaluated., Results: Our findings revealed that these plants showed promising skin keratinocyte antiproliferative activity. However, the petroleum ether extract of C. juncea (CJPE) and ethanol extract of L. aspera (LAEE) were found to exhibit significant activity (IC50 value = 45.45 and 55.36 µg/ml, respectively)., Discussion and Conclusions: The inhibitory action against NO production and lipid peroxidation in HaCaT cells suggested that the antipsoriatic activity of the extracts was mediated by an antioxidant mechanism. These findings validate the claims of the use of these plants in the treatment of psoriasis.