Brain glucose induces fungicidal tolerance during fungal meningitis

Brain glucose induces fungicidal tolerance during fungal meningitis

January 15th, 2024 | Lei Chen, Xiuyun Tian, Lanyue Zhang, Wenzhao Wang, Pengjie Hu, Zhongyi Ma, Yeqi Li, Shibin Li, Zhenghao Shen, Xin Fan, Leixin Ye, Guanghou Shui, Meng Xiao, Guang-Jun He, Ying Yang, Fan Bai, Guojian Liao, Min Chen, Xiaorong Lin, Chong Li, Linqi Wang
The study investigates the induction of fungicidal tolerance in *Cryptococcus neoformans* during fungal meningitis by brain glucose. The research reveals that glucose, a key energy source for the brain, induces fungal tolerance to amphotericin B (AmB) through the activation of the fungal glucose repression activator Mig1. Mig1-mediated tolerance limits the efficacy of AmB in treating cryptococcal meningitis in mice by inhibiting ergosterol synthesis and promoting the production of inositolphosphorylceramide (IPC), which competes with AmB for ergosterol. The combination of AmB with aureobasidin A (AbA), an inhibitor of IPC synthesis, shows improved efficacy against cryptococcal meningitis in mice. These findings highlight the importance of host-derived metabolites in inducing fungicidal tolerance and suggest potential therapeutic strategies to enhance the treatment of fungal meningitis.The study investigates the induction of fungicidal tolerance in *Cryptococcus neoformans* during fungal meningitis by brain glucose. The research reveals that glucose, a key energy source for the brain, induces fungal tolerance to amphotericin B (AmB) through the activation of the fungal glucose repression activator Mig1. Mig1-mediated tolerance limits the efficacy of AmB in treating cryptococcal meningitis in mice by inhibiting ergosterol synthesis and promoting the production of inositolphosphorylceramide (IPC), which competes with AmB for ergosterol. The combination of AmB with aureobasidin A (AbA), an inhibitor of IPC synthesis, shows improved efficacy against cryptococcal meningitis in mice. These findings highlight the importance of host-derived metabolites in inducing fungicidal tolerance and suggest potential therapeutic strategies to enhance the treatment of fungal meningitis.
Reach us at info@study.space
[slides] Brain glucose induces tolerance of Cryptococcus neoformans to amphotericin B during meningitis. | StudySpace