title: Down-regulation of adenosine A1 and A2A receptors in peripheral cells from idiopathic normal-pressure hydrocephalus patients.
abstract: Idiopathic normal-pressure hydrocephalus (iNPH) is a neurological disease that usually develops in the elderly. Natural history of iNPH is still unknown. It has been hypothesized that cerebrovascular diseases could have a role in etiology of chronic hydrocephalus and studies show an increased prevalence of cardiovascular diseases in iNPH patients. Moreover, evidences show a possible alteration of immune system in iNPH patients. Adenosine (Ado) is a metabolite produced in response to metabolic stress and injury. Adenosine and its receptors play an important role in vascular protection and in the modulation of inflammatory reactions and neuroinflammation. Our aim is to evaluate gene and protein expression of A1R and A2AR in the peripheral blood mononuclear cells (PBMCs) from iNPH patients compared to control subjects. We investigate if Ado system, that plays an important role in central nervous system, in vascular system, and also in inflammation, is involved in pathophysiology of iNPH disease. Our analysis showed that A1R mRNA levels and A1R density in PBMCs from iNPH patients were significantly lower than CT subjects (0.84 ± 0.12 and 2.42 ± 0.42, p<0.001 and 0.31 ± 0.02 and 0.42 ± 0.04, p=0.043; respectively). About A2AR, the gene expression in PBMCs was significantly lower in iNPH than CT (0.65 ± 0.09 and 1.5 ± 0.14, p<0.001) as well as there was a trend in protein expression: iNPH and CT (0.51 ± 0.05 and 0.62 ± 0.03; p=0.172). This preliminary study underlines the involvement of Ado system in iNPH disease whose pathophysiology is still unclear.
authors.affiliation: Geriatric Unit, Department of Medical Sciences and Community Health, University of Milan, Via Pace 9, 20122 Milan, Italy; PhD in Nutritional Sciences, University of Milan, Via Festa del Perdono 7, 20122 Milan, Italy. Electronic address: martina.casati@unimi.it.
authors.forename: Martina
authors.initials: M
authors.lastname: Casati
authors.affiliation: Geriatric Unit, Department of Medical Sciences and Community Health, University of Milan, Via Pace 9, 20122 Milan, Italy; Geriatric Unit, Fondazione Ca' Granda, IRCCS Ospedale Maggiore Policlinico, Via Pace 9, 20122 Milan, Italy.
authors.forename: Beatrice
authors.initials: B
authors.lastname: Arosio
authors.affiliation: Geriatric Unit, Department of Medical Sciences and Community Health, University of Milan, Via Pace 9, 20122 Milan, Italy.
authors.forename: Cristina
authors.initials: C
authors.lastname: Gussago
authors.affiliation: Geriatric Unit, Department of Medical Sciences and Community Health, University of Milan, Via Pace 9, 20122 Milan, Italy; PhD in Nutritional Sciences, University of Milan, Via Festa del Perdono 7, 20122 Milan, Italy.
authors.forename: Evelyn
authors.initials: E
authors.lastname: Ferri
authors.affiliation: Geriatric Unit, Department of Medical Sciences and Community Health, University of Milan, Via Pace 9, 20122 Milan, Italy; Geriatric Unit, Fondazione Ca' Granda, IRCCS Ospedale Maggiore Policlinico, Via Pace 9, 20122 Milan, Italy.
authors.forename: Lorenzo
authors.initials: L
authors.lastname: Magni
authors.affiliation: Geriatric Unit, Department of Medical Sciences and Community Health, University of Milan, Via Pace 9, 20122 Milan, Italy; Geriatric Unit, Fondazione Ca' Granda, IRCCS Ospedale Maggiore Policlinico, Via Pace 9, 20122 Milan, Italy.
authors.forename: Lara
authors.initials: L
authors.lastname: Assolari
authors.affiliation: Geriatric Unit, Department of Medical Sciences and Community Health, University of Milan, Via Pace 9, 20122 Milan, Italy; Geriatric Unit, Fondazione Ca' Granda, IRCCS Ospedale Maggiore Policlinico, Via Pace 9, 20122 Milan, Italy.
authors.forename: Valeria
authors.initials: V
authors.lastname: Scortichini
authors.affiliation: Geriatric Unit, Department of Medical Sciences and Community Health, University of Milan, Via Pace 9, 20122 Milan, Italy; Geriatric Unit, Fondazione Ca' Granda, IRCCS Ospedale Maggiore Policlinico, Via Pace 9, 20122 Milan, Italy.
authors.forename: Carolina
authors.initials: C
authors.lastname: Nani
authors.affiliation: Geriatric Unit, Fondazione Ca' Granda, IRCCS Ospedale Maggiore Policlinico, Via Pace 9, 20122 Milan, Italy.
authors.forename: Paolo Dionigi
authors.initials: PD
authors.lastname: Rossi
authors.affiliation: Geriatric Unit, Department of Medical Sciences and Community Health, University of Milan, Via Pace 9, 20122 Milan, Italy; Geriatric Unit, Fondazione Ca' Granda, IRCCS Ospedale Maggiore Policlinico, Via Pace 9, 20122 Milan, Italy.
authors.forename: Daniela
authors.initials: D
authors.lastname: Mari
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D015536:Down-Regulation; D005260:Female; D006801:Humans; D006850:Hydrocephalus, Normal Pressure / Q000235:genetics / Q000378:metabolism*; D007963:Leukocytes, Mononuclear / Q000378:metabolism*; D008297:Male; D043682:Receptor, Adenosine A1 / Q000235:genetics / Q000378:metabolism*; D043705:Receptor, Adenosine A2A / Q000235:genetics / Q000378:metabolism*
chemical_list: D043682:Receptor, Adenosine A1; D043705:Receptor, Adenosine A2A
keywords: Adenosine A(1) receptor; Adenosine A(2A) receptor; Idiopathic normal-pressure hydrocephalus