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oai:repisalud.isciii.es:20.500.12105/229422024-11-28T20:03:33Zcom_20.500.12105_15322com_20.500.12105_2051col_20.500.12105_16967

00925njm 22002777a 4500 dc Ramis, Margarita R author Sarubbo, Fiorella author Tejada Gavela, Silvia author Jiménez, Manuel author Esteban, Susana author Miralles, Antonio author Moranta, David author 2020-02 Polyphenolic compounds from green tea have great interest due to its large CONSUMPTION and therapeutic potential on the age-associated brain decline. The current work compares a similar dose regimen of a whole-green-tea extract and catechin in old rats over the course of 36 days. Results showed a significant improvement in visuo-spatial working memory and episodic memory of old rats after polyphenolic compounds administration assessed by behavioral tests. No effects were observed on the age-associated motor coordination decline. Statistically, results were correlated with significant improvements, mainly in hippocampal and striatal noradrenergic and serotonergic systems, but also with the striatal dopaminergic system. Both polyphenolic treatments also reverted the age-associated reduction of the neuroinflammation by modulating protein sirtuin 1 (SIRT1) expression in hippocampus, but no effects were observed in the usual reduction of the histone-binding protein RBAP46/48 protein linked to aging. These results are in line with previous ones obtained with other polyphenolic compounds, suggesting a general protective effect of all these compounds on the age-associated brain decline, pointing to a reduction of the oxidative stress and neuroinflammatory status reduction as the leading mechanisms. Results also reinforce the relevance of SIRT1-mediated mechanism on the neuroprotective effect and rule out the participation of RBAP46/48 protein. Ramis Margarita R, Sarubbo F, Tejada S, Jimenez M, Esteban S, Miralles A, et al. Chronic Polyphenon-60 or Catechin Treatments Increase Brain Monoamines Syntheses and Hippocampal SIRT1 LEVELS Improving Cognition in Aged Rats. Nutrients. 2020 Feb;12(2):326. http://hdl.handle.net/20.500.13003/11898 https://hdl.handle.net/20.500.12105/22942 31991916 10.3390/nu12020326 2072-6643 Nutrients 2-s2.0-85078687612 522458700053 L2003679845 Brain aging Memory Green tea Catechin Brain monoamine synthesis SIRT1 RBAP46/48 NF-kappa B Chronic Polyphenon-60 or Catechin Treatments Increase Brain Monoamines Syntheses and Hippocampal SIRT1 LEVELS Improving Cognition in Aged Rats