Human Insulin Modulates α-synuclein Aggregation Via DAF-2/DAF-16 Signalling Pathway by Antagonising DAF-2 Receptor in Model of Parkinson's Disease

Overview

Journal Oncotarget

Specialty Oncology

Date 2020 Feb 29

PMID 32110282

Citations 6

Authors

Rizwanul Haque

Shamsuzzama

Lalit Kumar

Tanuj Sharma

Soobiya Fatima

Pooja Jadiya

Mohammad I Siddiqi

Aamir Nazir

Affiliations

Soon will be listed here.

Abstract

Insulin-signalling is an important pathway in multiple cellular functions and organismal ageing across the taxa. A strong association of insulin-signalling with Parkinson's disease (PD) has been proposed but the exact nature of molecular events and genetic associations are yet to be understood. We employed transgenic strain harboring human α-synuclein::YFP transgene, towards studying the aggregation pattern of α-synuclein, a PD-associated endpoint, under human insulin (Huminsulin®) treatment and DAF-16/DAF-2 knockdown conditions, independently and in combination. The aggregation was increased when DAF-16 was knocked-down independently or alongwith a co-treatment of Human insulin (HumINS) and decreased when DAF-2 was knocked-down independently or alongwith a co-treatment of HumINS; whereas HumINS treatment per se, reduced the aggregation. Our results depicted that HumINS decreases α-synuclein aggregation via DAF-2/DAF-16 pathway by acting as an antagonist for DAF-2 receptor. Knockdown of reported DAF-2 agonist (INS-6) and antagonists (INS-17 and INS-18) also resulted in a similar effect on α-synuclein aggregation. Further by utilizing bioinformatics tools, we compared the differences between the binding sites of probable agonists and antagonists on DAF-2 including HumINS. Our results suggest that HumINS treatment and DAF-16 expression play a protective role against α-synuclein aggregation and its associated effects.

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