Clomipramine inhibits dynamin GTPase activity by L-α-phosphatidyl-L-serine stimulation.

Hiroshi Miyoshi, Masahiro Otomo, Kiyofumi Takahashi

Journal of biochemistry 2023 Jul 31

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Three dynamin isoforms play critical roles in clathrin-dependent endocytosis. Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) enters host cells via clathrin-dependent endocytosis. We previously reported that 3-(3-chloro-10,11-dihydro-5H-dibenzo[b,f]azepin-5-yl)-N,N-dimethylpropan-1-amine (clomipramine) inhibits the GTPase activity of dynamin 1, which is in mainly neuron. Therefore, we investigated whether clomipramine inhibits the activity of other dynamin isoforms in this study. We found that, similar to its inhibitory effect on dynamin 1, clomipramine inhibited the l-α-phosphatidyl-l-serine-stimulated GTPase activity of dynamin 2, which is expressed ubiquitously, and dynamin 3, which is expressed in the lung. Inhibition of GTPase activity raises the possibility that clomipramine can suppress SARS-CoV-2 entry into host cells. © The Author(s) 2023. Published by Oxford University Press on behalf of the Japanese Biochemical Society. All rights reserved.

Citation

Hiroshi Miyoshi, Masahiro Otomo, Kiyofumi Takahashi. Clomipramine inhibits dynamin GTPase activity by L-α-phosphatidyl-L-serine stimulation. Journal of biochemistry. 2023 Jul 31;174(3):267-272