Repository logo
 

The association of circulating amylin with β-amyloid in familial Alzheimer's disease.

Published version
Peer-reviewed

Type

Article

Change log

Authors

Ly, Han 
Verma, Nirmal 
Sharma, Savita 
Kotiya, Deepak 
Despa, Sanda 

Abstract

INTRODUCTION: This study assessed the hypothesis that circulating human amylin (amyloid-forming) cross-seeds with amyloid beta (Aβ) in early Alzheimer's disease (AD). METHODS: Evidence of amylin-AD pathology interaction was tested in brains of 31 familial AD mutation carriers and 20 cognitively unaffected individuals, in cerebrospinal fluid (CSF) (98 diseased and 117 control samples) and in genetic databases. For functional testing, we genetically manipulated amylin secretion in APP/PS1 and non-APP/PS1 rats. RESULTS: Amylin-Aβ cross-seeding was identified in AD brains. High CSF amylin levels were associated with decreased CSF Aβ42 concentrations. AD risk and amylin gene are not correlated. Suppressed amylin secretion protected APP/PS1 rats against AD-associated effects. In contrast, hypersecretion or intravenous injection of human amylin in APP/PS1 rats exacerbated AD-like pathology through disruption of CSF-brain Aβ exchange and amylin-Aβ cross-seeding. DISCUSSION: These findings strengthened the hypothesis of circulating amylin-AD interaction and suggest that modulation of blood amylin levels may alter Aβ-related pathology/symptoms.

Description

Keywords

amylin, amyloid, familial Alzheimer's disease, islet amyloid polypeptide, sporadic Alzheimer's disease

Journal Title

Alzheimers Dement (N Y)

Conference Name

Journal ISSN

2352-8737
2352-8737

Volume Title

7

Publisher

Wiley
Sponsorship
Medical Research Council (MR/N026004/1)