Benzoyl peroxide

Benzoyl peroxide is a compound with antibacterial and keratolytic properties that inhibits the growth of acne-associated bacteria and helps unclog pores; it is widely used in research on acne and related skin conditions.

ROS:13 μM, PKC:1 mM, PKM:1.7 mM

Method: Human peripheral blood polymorphonuclear leukocytes (PMNLs) were isolated and pretreated with various concentrations of Benzoyl peroxide for 10 min, followed by stimulation with phorbol myristate acetate (PMA, 1.5 μg) for 20 min. Reactive oxygen species (ROS) release was measured using the cytochrome C reduction assay.
Result: Benzoyl peroxide dose-dependently inhibited PMA-induced ROS release from PMNLs, with an IC₅₀ of approximately 13 μM (n=6) ^[1].
Method: Human peripheral blood PMNLs were isolated and treated with various concentrations of Benzoyl peroxide under incubation conditions identical to those used in the ROS release assay. Cell viability was assessed by trypan blue staining, and lactate dehydrogenase (LDH) activity released into the culture medium was measured to evaluate cytotoxicity.
Result: Benzoyl peroxide dose-dependently reduced PMNL cell viability. At concentrations of 0.3 mM and above, cell viability dropped below 10%; at 1 mM, released LDH accounted for 68.3 ± 3.7% of total LDH (n=3) ^[1].
Method: Protein kinase C (PKC) was partially purified from Wistar rat brains, and its catalytic domain PKM was prepared by limited tryptic digestion. The effects of various concentrations of Benzoyl peroxide on PKC and PKM activities were determined using histone as a substrate and γ-[³²P]ATP as a phosphate donor.
Result: Benzoyl peroxide inhibited PKC activity with an IC₅₀ of approximately 1 mM (n=5); its inhibitory potency against PKM was comparable to that against PKC (IC₅₀ ≈ 1.7 mM, n=5) ^[1].