The invention discloses a novel application of oxymatrine in improving psoriasis symptoms by activating PPP2CA to inhibit ERalpha activity. The novel application comprises the following steps: animal experiments; cell experiments; determining the activity of the CCK-8 cell; carrying out Giemsa staining; the ELISA kit is used for detecting inflammatory cytokines IL-17 and IL-23; carrying out DIA proteomics; carrying out PPP2CA target verification; a PPP2CA siRNA knockout experiment is carried out; a PPP2CA overexpression plasmid experiment is carried out; evaluating the curative effect of the PPP2CA inhibitor; chemical proteomics; molecular docking; determining the enzyme activity of the PPP2CA; carrying out a thermal drift experiment (CETSA) / Western Blot experiment; phosphorylated proteomics; an estrogensignal channel key protein siRNA knock-down experiment; determining the ERalpha activity through a dual-luciferasereporter gene experiment; and statistical analysis. According to the invention, oxymatrine can be promoted to directly activate PPP2CA, so that phosphorylation in estrogensignalcascade is reduced, and the activity of an estrogenreceptor alpha (ER alpha) is reduced.
Described herein are compositions and methods for treating Duchenne muscular dystrophy (DMD) in a subject with DMD or a carrier of the DMD gene using (Z)-endoxifen. (Z)-endoxifen modulates estrogenreceptor activity and proteinkinase signaling, stabilizes calcium levels, and reduces oxidative stress, which mitigate muscle deterioration associated with DMD. A therapeutically effective amount of (Z)-endoxifen is administered, either alone or in combination with other treatments such as corticosteroids or ataluren, in various formulations including oral, topical, and inhalation forms. The (Z)-endoxifen may be formulated as sustained or delayed-release to enhance therapeutic efficacy.