(c) Fotolia
The study coordinated by Portuguese researchers from Instituto de Medicina Molecular (iMM Lisboa) and collaborators from Inserm in Lille, France, along with teams from Germany and United States, showed that the abnormalexpression of a particular receptor – the adenosine A2A, target for caffeine – in the brain of rats induces an aging-like profile namely memory impairments linked to the loss of stress controlling mechanisms.
“This is part of a larger study initiated 4 years ago in which we identified the role of this receptor in stress, but we did not know whether its activation would be sufficient to trigger all the changes. We now found that by altering the amount of this receptor alone in neurons from hippocampus and cortex – memory related areas – is sufficient to induce a profile that we designate as ‘early-aging’ combining the memory loss and an increase in stress hormones in plasma (cortisol)” – explains Luisa Lopes, Group Leader at iMM Lisboa and the coordinator of the study.
When the same animals were treated with a caffeine analogue, which blocks the action of adenosine A2A receptors, both memory and stress related deficits were normalized.
David Blum, from Inserm research director, adds:
This is important not only to understand the fundamental changes that occur upon aging, but it also identifies the dysfunctions of the adenosine A2A receptor as a key player in triggering these changes. And a very appealing therapeutic target” – concludes Luisa Lopes.
About Luísa Lopes
Luísa V. Lopes is a Group leader@iMM Lisboa, Portugal since 2013. Luisa graduated in Lisbon in 1998 in Biochemistry and then pursued a PhD in Neurosciences being trained in the University of Cambridge, UK and at the Karolinska Institute, Sweden. Her current work focuses on understanding the mechanisms inducing the “early-aging” of the cognitive function. The team has provided evidence for an important contribution of adenosine receptors in pathophysiological context, and their impact in noxious brain conditions such as stress, aging and neurodegeneration. Her team provided crucial evidence of a possible glucocorticoid-adenosine link in Alzheimer’s disease (with D. Blum) following previous groundwork suggesting circadian disorders as a trigger for accelerated cognitive loss.
About David Blum
David Blum is Inserm Research Director at UMR-S 1172 Inserm/Université Lille2/CHRU Lille in the laboratory “Alzheimer & Tauopathies” headed by Dr. Luc Buée. David graduated in Strasbourg University and got his PhD at Inserm in Grenoble. Current work of David Blum focus on the understanding of the role of caffeine and adenosine receptors in cognitive disorders, particularly Alzheimer’s Disease. In this field, the laboratory has recently provided evidence, with the group of Luisa Lopes, that A2A receptors are important for the development of AD-like Tau pathology. Our current work is interested on the instrumental role of sub-population of A2A receptors in the brain on the occurence of cognitive disorders in neurological disorders.
About iMM Lisboa
Instituto de Medicina Molecular (iMM Lisboa) is a reference biomedical research centre in Portugal, having acquired the special status of Associate Laboratory of the Portuguese Ministry of Science and Technology. iMM’s mission is to promote basic, translational and clinical biomedical research, with the aim of understanding the mechanisms of disease and developing new therapeutic approaches.
For more information please visit the iMM Lisboa’s website: www.imm.medicina.ulisboa.pt
“Alzheimer & Tauopahies” laboratory at UMR-S 1172 Inserm/Université Lille 2/CHRU-Lille is a world class research laboratory interested in the molecular, cellular, and physiological aspects of Alzheimer’s Disease and dementia. The lab is part of the LabEx DISTALZ (national consortium on AD) and of the LICEND excellence centre for neurodegenerative diseases.
Neurosciences, cognitives sciences, neurology and psychiatry Voir tout
France : David Blum Directeur de recherche Inserm Equipe "Alzheimer & Tauopathies" (UMR 1172 Inserm / Université de Lille /CHRU) Lille +33 6 50 82 04 80 david.blum@inserm.fr Portugal : Luísa V. Lopes Instituto de Medicina Molecular, Lisbonne lvlopes@medicina.ulisboa.pt
Communication iMM Lisboa | Clara Artur | imm-communication@medicina.ulisboa.pt Communication Inserm Paris | Juliette Hardy | presse@inserm.fr
The caffeine-binding adenosine A2A receptor induces age-like HPA-axis dysfunction by targeting glucocorticoid receptor function Vânia L. Batalha1,11, Diana G. Ferreira1,2,3, Joana E. Coelho1, Jorge S.Valadas1,#, Rui Gomes1,4, Mariana Temido-Ferreira1, Tatiana Shmidt7, Younis Baqi9,10, Luc Buée6, Christa E. Müller9, Malika Hamdane6, Tiago F.Outeiro2,14,15, Michael Bader7,8,13,Sebastiaan H. Meijsing11, Ghazaleh Sadri-Vakili12, David Blum6,* and Luísa V. Lopes1,* 1Instituto de Medicina Molecular, Faculdade de Medicina de Lisboa, Universidade de Lisboa, Portugal 2Department of Neurodegeneration and Restorative Research, University Medical Center Göttingen, 3Instituto de Farmacologia e Terapêutica, Faculdade de Medicina do Porto, Universidade do Porto, Portugal 4Faculdade de Ciências de Lisboa, Universidade de Lisboa, Portugal 5Laboratory of Neurophysiology, ULB Neuroscience Institute, Université Libre de Bruxelles (ULB), Brussels, Belgium 6 Inserm, UMR-S 1172, Alzheimer & Tauopathies, Centre de Recherche Jean-Pierre Aubert, Lille, Univ. Lille, Faculté de Médecine, Lille F-59045, France. 7Max-Delbrück-Center for Molecular Medicine (MDC), Berlin, Germany 8Charité-University Medicine Berlin, Germany 9PharmaCenter Bonn, Pharmazeutische Chemie I, Pharmazeutisches Institut, University of Bonn, Bonn, Germany 10 Department of Chemistry, Faculty of Science, Sultan Qaboos University, Muscat, Oman 11Max Planck Institute for Molecular Genetics, Berlin,Germany 12MassGeneral Institute for Neurodegenerative Disease, Massachusetts General Hospital, Boston, MA, United States of America. 13Institute of Biology, University of Lübeck, Germany 14Max Plank Institute for Experimental Medicine, Goettingen, Germany 15CEDOC, Centro de Estudos de Doenças Crónicas, Lisbon, Portugal Scientific Reports (Springer Nature), 11 aout 2016 www.dx.doi.org/10.1038/srep31493
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22.03.2020
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09.07.2019
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