phosphatase ester hydrolysis

Clindamycin Phosphate is the phosphate salt form of clindamycin, a semi-synthetic, chlorinated broad-spectrum antibiotic produced by chemical modification of lincomycin. Clindamycin phosphate (Clindamycin 2-dihydrogen phosphate) is used in topical preparations.

Photosensitizer-8 (Compound 4) is a derivative of 2-anthrol and serves as a photosensitizer activated by alkaline phosphatase (ALP). In the presence of ALP, it undergoes a phosphate ester hydrolysis reaction, rapidly converting into the active photosensitizer 2-anthrol. Upon irradiation, Photosensitizer-8 exhibits cytotoxicity against cancer cells with ALP overexpression, such as HeLa, A549, and HCT116, with IC50 values of 14.3 μM, 21.6 μM, and 17.5 μM respectively, while showing no significant cytotoxicity towards normal lung fibroblasts (WI-38) with IC50 ≥ 30 μM. Photosensitizer-8 is applicable in researching photodynamic therapy for cancers associated with ALP overexpression.

Clindamycin phosphate hydrochloride (Clindamycin 2-phosphate), a broad-spectrum bacteriostatic lincosamide antibiotic, serves as a prodrug of Clindamycin. It lacks antimicrobial activity in vitro; however, through phosphatase ester hydrolysis, it is rapidly converted to the active form, Clindamycin, in vivo. This compound is utilized in the research of acne and bacterial vaginosis [1] [2] [3].