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Published on: September 28, 2019
ADS-J1 disaggregates semen-derived amyloid fibrils
Jinqing Li1, Zichao Yang1, Han Liu1
1Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, Guangdong Province, China.
ADS-J1 effectively disassembles semen-derived amyloid fibrils (SEVI) and other amyloid structures. This compound shows potential as a dual-action microbicide and a therapeutic for amyloid diseases.
Area of Science:
- Biochemistry
- Structural Biology
- Drug Discovery
Background:
- Semen-derived amyloid fibrils (SEVI) enhance HIV-1 sexual transmission.
- ADS-J1 inhibits HIV-1 entry and seminal amyloid fibril formation.
- The effect of ADS-J1 on mature seminal fibrils was previously unknown.
Purpose of the Study:
- To investigate ADS-J1's capacity to disassemble seminal amyloid fibrils.
- To elucidate the mechanism of action for ADS-J1's fibril remodeling.
- To explore ADS-J1's potential as a microbicide and therapeutic for amyloid diseases.
Main Methods:
- Biophysical and biochemical measurements.
- Molecular dynamic (MD) simulations.
- Analysis of fibril remodeling of SEVI, SEM1, and endogenous seminal fibrils.
Main Results:
- ADS-J1 effectively remodeled SEVI, SEM186-107, and endogenous seminal fibrils.
- ADS-J1 disaggregated SEVI fibrils into monomers, independent of oxidation.
- MD simulations showed ADS-J1 binds strongly to PAP248-286, leading to disassembly and preventing re-aggregation.
Conclusions:
- ADS-J1 disassembles seminal amyloid fibrils and other amyloid structures like Aβ1-42.
- ADS-J1's mechanism involves binding to the fibril surface and core, inducing conformational changes.
- ADS-J1 holds promise as a combination microbicide and a lead compound for amyloidogenic diseases.
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