NDLI: AKT inhibition in the central nervous system induces signaling defects resulting in psychiatric symptomatology

Content Provider	Springer Nature : BioMed Central
Author	Tsimberidou, Apostolia-Maria Skliris, Antonis Valentine, Alan Shaw, Jamie Hering, Ursula Vo, Henry Hiep Chan, Tung On Armen, Roger S. Cottrell, Jeffrey R. Pan, Jen Q. Tsichlis, Philip N.
Abstract	Background Changes in the expression and activity of the AKT oncogene play an important role in psychiatric disease. We present translational data assessing the role of AKT in psychiatric symptoms. Methods (1) We assessed the protein activity of an AKT3 mutant harboring a PH domain mutation (Q60H) detected in a patient with schizophrenia, the corresponding AKT1 mutant (Q61H), and wild-type AKT1 and AKT3 transduced in AKT-null mouse fibroblasts and modeled the Q61H mutation onto the crystal structure of the Akt1 PH domain. (2) We analyzed the results of earlier genome-wide association studies to determine the distribution of schizophrenia-associated single-nucleotide polymorphisms (SNPs) in the AKT3 gene. (3) We analyzed the psychiatric adverse events (AEs) of patients treated with M2698 (p70S6K/AKT1/AKT3 inhibitor) and with other PI3K/AKT/mTOR pathway inhibitors. Results (1) Proteins encoded by AKT3 (AKT3Q60H) and AKT1 (AKT1Q61H) mutants had lower kinase activity than those encoded by wild-type AKT3 and AKT1, respectively. Molecular modeling of the AKT1-Q61H mutant suggested conformational changes that may reduce the binding of D3-phosphorylated phosphoinositides to the PH domain. (2) We identified multiple SNPs in the AKT3 gene that were strongly associated with schizophrenia (p < 0.5 × 10–8). (3) Psychiatric AEs, mostly insomnia, anxiety, and depression, were noted in 29% of patients treated with M2698. In randomized studies, their incidence was higher in PI3K/AKT/mTOR inhibitor arms compared with placebo arms. All psychiatric AEs were reversible. Conclusions Our data elucidate the incidence and mechanisms of psychiatric AEs in patients treated with PI3K/AKT/mTOR inhibitors and emphasize the need for careful monitoring.
Related Links	https://cellandbioscience.biomedcentral.com/counter/pdf/10.1186/s13578-022-00793-8.pdf
Ending Page	13
Page Count	13
Starting Page	1
File Format	HTM / HTML
ISSN	20453701
DOI	10.1186/s13578-022-00793-8
Journal	Cell & Bioscience
Issue Number	1
Volume Number	12
Language	English
Publisher	BioMed Central
Publisher Date	2022-05-07
Access Restriction	Open
Subject Keyword	Cell Biology Microbiology Stem Cells Neurobiology Proteomics AKT PI3K Advanced cancer Clinical trial Central nervous system Mental illness
Content Type	Text
Resource Type	Article
Subject	Biochemistry, Genetics and Molecular Biology
Journal Impact Factor	6.1/2023
5-Year Journal Impact Factor	7/2023

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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