Increased Penetration of Diphenhydramine in Brain Via Proton-coupled Organic Cation Antiporter in Rats with Lipopolysaccharide-induced Inflammation
Overview
Authors
Affiliations
Uptake transporters in brain microvascular endothelial cells (BMECs) are involved in the penetration of basic (cationic) drugs such as diphenhydramine (DPHM) into the brain. Lipopolysaccharide (LPS)-induced inflammation alters the expression levels and activities of uptake transporters, which change the penetration of DPHM into the brain. A brain microdialysis study showed that the unbound brain-to-plasma partition coefficient ( ) for DPHM in LPS rats was approximately two times higher than that in control rats. The transcellular transport of DPHM to BMECs was increased when BMECs were cultured with serum from LPS rats. Compared with control rats or BMECs, the brain uptake of DPHM in LPS rats was increased and the intracellular accumulation of DPHM was increased under a high intracellular pH in BMECs from LPS rats, respectively. Treatment of BMECs with transporter inhibitors or inflammatory cytokines had little impact on the intracellular accumulation of DPHM in BMECs. This study suggests that LPS-induced inflammation promotes unidentified proton-coupled organic cation (H/OC) antiporters that improve the penetration of DPHM into rat brain via the blood-brain barrier.
Ballgren F, Hammarlund-Udenaes M, Loryan I Fluids Barriers CNS. 2024; 21(1):95.
PMID: 39623471 PMC: 11613587. DOI: 10.1186/s12987-024-00598-6.
Region-independent active CNS net uptake of marketed H/OC antiporter system substrates.
Ballgren F, Hu Y, Li S, van de Beek L, Hammarlund-Udenaes M, Loryan I Front Cell Neurosci. 2024; 18:1493644.
PMID: 39534684 PMC: 11554538. DOI: 10.3389/fncel.2024.1493644.
Active CNS delivery of oxycodone in healthy and endotoxemic pigs.
Ballgren F, Bergfast T, Ginosyan A, Mahajan J, Lipcsey M, Hammarlund-Udenaes M Fluids Barriers CNS. 2024; 21(1):86.
PMID: 39443944 PMC: 11515623. DOI: 10.1186/s12987-024-00583-z.
Svane N, Pedersen A, Rodenberg A, Ozgur B, Saaby L, Bundgaard C Fluids Barriers CNS. 2024; 21(1):39.
PMID: 38711118 PMC: 11071266. DOI: 10.1186/s12987-024-00544-6.
Akanuma S, Han M, Murayama Y, Kubo Y, Hosoya K Pharm Res. 2022; 39(2):223-237.
PMID: 35112227 DOI: 10.1007/s11095-022-03179-0.