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Functional variation (Q63R) in the cannabinoid CB2 receptor may affect the severity of COVID-19: a human study and molecular docking

Evidence supports a role of host genetic diversity in the clinical course of coronavirus disease 2019 (COVID-19). Variation in the cannabinoid CB2 receptor gene ( CNR2 ) could affect the regulatory action of endocannabinoids on the immune system, resulting in an increased risk of various inflammator...

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Published in:Archives of virology 2021-11, Vol.166 (11), p.3117-3126
Main Authors: Rastegar, Mostafa, Samadizadeh, Saeed, Yasaghi, Mohammad, Moradi, Abdolvahab, Tabarraei, Alijan, Salimi, Vahid, Tahamtan, Alireza
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description Evidence supports a role of host genetic diversity in the clinical course of coronavirus disease 2019 (COVID-19). Variation in the cannabinoid CB2 receptor gene ( CNR2 ) could affect the regulatory action of endocannabinoids on the immune system, resulting in an increased risk of various inflammatory diseases. The present study investigated the relationship between the CNR2 -Q63R variant and COVID-19 severity. A total of 200 Iranian COVID-19 patients were enrolled in the study and genotyped using a TaqMan assay. The co-dominant, dominant, recessive, over-dominant, and additive inheritance models were analyzed using SNPStats software. In silico molecular docking was also performed to simulate the effects of the Q63R variation on CB2 binding with a ligand and with the G-protein. A significant difference in the Q63R allele and genotype distribution was found between expired and discharged COVID-19 patients in co-dominant, recessive, and additive inheritance models. The molecular docking results showed that the predicted structure of mutant CB2 (63R type) could not bind to the G-protein in the correct position. The data indicated that the Q63R variation in the CNR2 gene may affect the severity of COVID-19. Identification of genes related to susceptibility and severity of COVID-19 may lead to specific targets for drug repurposing or development. Graphic abstract
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Variation in the cannabinoid CB2 receptor gene ( CNR2 ) could affect the regulatory action of endocannabinoids on the immune system, resulting in an increased risk of various inflammatory diseases. The present study investigated the relationship between the CNR2 -Q63R variant and COVID-19 severity. A total of 200 Iranian COVID-19 patients were enrolled in the study and genotyped using a TaqMan assay. The co-dominant, dominant, recessive, over-dominant, and additive inheritance models were analyzed using SNPStats software. In silico molecular docking was also performed to simulate the effects of the Q63R variation on CB2 binding with a ligand and with the G-protein. A significant difference in the Q63R allele and genotype distribution was found between expired and discharged COVID-19 patients in co-dominant, recessive, and additive inheritance models. The molecular docking results showed that the predicted structure of mutant CB2 (63R type) could not bind to the G-protein in the correct position. The data indicated that the Q63R variation in the CNR2 gene may affect the severity of COVID-19. Identification of genes related to susceptibility and severity of COVID-19 may lead to specific targets for drug repurposing or development. 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The molecular docking results showed that the predicted structure of mutant CB2 (63R type) could not bind to the G-protein in the correct position. The data indicated that the Q63R variation in the CNR2 gene may affect the severity of COVID-19. Identification of genes related to susceptibility and severity of COVID-19 may lead to specific targets for drug repurposing or development. 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subjects Biomedical and Life Sciences
Biomedicine
Cannabinoid CB2 receptors
Case-Control Studies
Coronaviruses
COVID-19
COVID-19 - diagnosis
COVID-19 - genetics
Female
Gene Frequency
Genetic diversity
Genetic Predisposition to Disease - genetics
Genotype
Genotypes
GTP-Binding Proteins - metabolism
Heredity
Humans
Immune system
Infectious Diseases
Inflammatory diseases
Iran
Male
Medical Microbiology
Middle Aged
Models, Molecular
Molecular Docking Simulation
Molecular modelling
Original
Original Article
Patients
Polymorphism, Genetic
Protein Binding
Receptor, Cannabinoid, CB2 - chemistry
Receptor, Cannabinoid, CB2 - genetics
Receptor, Cannabinoid, CB2 - metabolism
SARS-CoV-2
Severity of Illness Index
Virology
title Functional variation (Q63R) in the cannabinoid CB2 receptor may affect the severity of COVID-19: a human study and molecular docking
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