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Biology and function of ADAM10 isoforms for differential diagnosis of Alzheimer's Disease by electrochemical sensors

Grant number: 21/01863-9
Support Opportunities:Research Projects - Thematic Grants
Duration: September 01, 2022 - August 31, 2027
Field of knowledge:Health Sciences - Medicine - Psychiatry
Principal Investigator:Márcia Regina Cominetti
Grantee:Márcia Regina Cominetti
Host Institution: Centro de Ciências Biológicas e da Saúde (CCBS). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil
Pesquisadores principais:
Ronaldo Censi Faria
Associated researchers: Elena Marcello ; Henrique Pott Junior ; Marcio Luiz Figueredo Balthazar ; Patricia Regina Manzine Moralles ; Ronaldo Censi Faria ; Tássia Regina de Oliveira
Associated grant(s):21/14673-3 - Multi-user equipment approved in grant 2021/01863-9: Real time PCR system QuantStudio qPCR, AP.EMU
Associated scholarship(s):24/03123-0 - Association between LDL cholesterol levels and ADAM10 in carriers and non-carriers of the APOE e4 allele, BP.IC
24/00426-2 - The many faces of dementia: humanizing the diagnosis of Alzheimer's disease, BP.JC
24/00425-6 - The many faces of dementia: humanizing the diagnosis of Alzheimer's disease, BP.JC
+ associated scholarships 23/14681-1 - Relationship between plasma levels of ADAM10 and cognitive performance in cognitively healthy elderly individuals and those with Alzheimer's disease in ACER and CERAD batteries., BP.IC
23/18350-0 - EnvelheCiência: Importance of Disseminating Research on Aging and Dementias in the Brazilian Population, BP.JC
23/17574-1 - Association between ADAM10 levels and cardiovascular risk in cognitively healthy adults, BP.IC
23/00868-2 - Structural bases of the ADAM10 isoforms proteolytic activity, BP.DR
23/08952-2 - Training and technical training for the project 'Biology and function of ADAM10 isoforms for the differential diagnosis of Alzheimer's disease through electrochemical sensors', BP.TT
23/00449-0 - Levels and activity of ADAM10, an Alzheimers disease serum biomarker, in different cellular compartments, BP.MS
22/15314-0 - Effects of single nucleotide polymorphisms (SNPs) on ADAM10 levels and activities in patients with dementia of Alzheimer's disease compared to cognitively healthy older adults, BP.PD
21/01906-0 - Expression and activity of ADAM10 and levels of insulinic route proteins in neuroblastoma cells under hyperglycemic and normoglycemic conditions, BP.MS - associated scholarships


Alzheimer's Disease (AD) is a gradual and progressive neurodegenerative disease characterized by extensive neuronal losses and deposits of neurofibrillary tangles and senile plaques. Mild neurocognitive impairment (MCI) is characterized by cognitive decline, but with preservation of functionality, being an intermediate stage between normal AD cognition, but that can be reversed. ADAM10 is the main neuronal ±-secretase and is also present in platelets, leukocytes and cerebrospinal fluid (CSF). This protein is able to act in the non-amyloidogenic pathway of cleavage of the amyloid precursor protein (APP) and, therefore, prevent the formation of the ²-amyloid peptide (A²), one of the pathological hallmarks of AD. Biomarkers that can diagnose AD in its early stages as MCI, preferably in samples that do not require highly invasive collection procedures, are the target of many recent studies and present a major clinical challenge in the area. Our group has been studying peripheral biomarkers for AD since 2010 with results that indicate that ADAM10 levels are decreased in platelets and increased in plasma of elderly people with this dementia, compared with older adults with MCI or cognitively healthy. We also identified that the ADAM10 platelet and plasma isoforms have distinct molecular weights, 60 and 50kDa, respectively, and that the plasma isoform, also present in the CSF, is inactive to cleave a specific fluorogenic substrate for ADAM10. More importantly, a recent longitudinal study showed that increased levels of plasma ADAM10 are able to predict the participants' cognitive worsening at the follow-up. The cognitive decline was more pronounced in individuals who had normal scores on the mini-mental state examination (MMSE) in the initial evaluation, when compared with those with altered scores at the beginning of the study. Thus, the assessment of ADAM10 levels in the plasma of patients with suspected cognitive decline, but who have not yet reached such a decline, may allow early interventions that could delay or even prevent AD onset. In this sense, the objectives of this study are: to evaluate the activity of ADAM10 in different cell fractions; to correlate the plasma and platelet levels of ADAM10 with the CSF levels, in the different groups of the study; to determine, by mass spectrometry, the complete sequences of the two isoforms of ADAM10 to better understand its biological functions and; finally, improve the detection of this protein in a electrochemical sensor already developed by the group, assessing ADAM10 levels in other types of dementia as well. The clinical impact of this study is related to a new approach that could be used in the diagnosis of this type of dementia, forming a panel of blood biomarkers with greater discriminative potential. In addition, this study will contribute to a better understanding of the biology of ADAM10 and the disease itself. (AU)

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
DE OLIVEIRA, TASSIA R.; MANZINE, PATRICIA R.; COMINETTI, MARCIA R.; LEITE, OLDAIR D.; FARIA, RONALDO C.. Electrochemical magneto-immunoassay for detection of ADAM10 Alzheimer's biomarker using gold nanoparticles as label. Talanta, v. 266, p. 8-pg., . (17/24053-7, 15/26084-1, 17/24839-0, 15/19890-1, 21/01863-9)
COMINETTI, MARCIA REGINA; POTT, HENRIQUE; ROMERO-ORTUNO, ROMAN; ZUNIGA, RAQUEL GUTIERREZ. Protecting cognitive function in older adults with age-related hearing loss: Insights from The Irish Longitudinal Study on Ageing (TILDA) and the role of hearing aids. ARCHIVES OF GERONTOLOGY AND GERIATRICS, v. 112, p. 8-pg., . (21/01863-9)

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