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New research found that evolutionary changes in the human brain could be a potential cause of the development of anxiety.Neurochemicals like dopamine and serotonin play significant roles in the emotional as well as cognitive functions of the human brain. Vesicular monoamine transporter 1 (VMAT1) is one of the many genes that are majorly responsible for regulating neuronal signalling and for transporting neurotransmitters.The research team of the Tohoku University reconstructed ancestral VMAt1 proteins for their study which further revealed the functional changes that have taken place in the neurotransmitter uptake of VMAT1 during the course of human evolution.The team of researchers including Professor Masakado Kawata and PhD candidate Daiki Sato of the Graduate School of Life Sciences at Tohoku University previously found out that VMAT1 is one of the genes that had evolved through the human lineage.VMAT 1 contains two mutations or the genome changes which are human-specific.In the study, the researchers revealed the evolutionary changes present in the uptake of neurotransmitters through the reconstruction of ancestral VMAT1 proteins.The researchers began by applying a fluorescent substrate for visualizing and quantifying the neurotransmitter uptake of every genotype.The researchers found out that the ancestral VMAT1 protein exhibited an increased uptake of neurotransmitters as compared to the derived genotype which is shown to be associated with depression and/or anxiety in contemporary human populations."This results of our study reveal that our ancestors may have been able to withstand higher levels of anxiety or depression," said the authors of the study.The researchers would next try to get a better understanding of how the variants contributed to our brain evolution."This would be the striking evidence that links the evolution of our genome and brain," said the authors of the study.( With inputs from ANI )

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Lifestyle :Evolutionary changes in human brain, potential reason of anxiety: Study

New research found that evolutionary changes in the human brain could be a potential cause of the development of anxiety. ...