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Antioxidant Responses are Crucial for Defense against Misfolded Human Z-Type α-Antitrypsin. | LitMetric

Antioxidant Responses are Crucial for Defense against Misfolded Human Z-Type α-Antitrypsin.

Protein Pept Lett

Department of Integrative Bioscience and Biotechnology, Sejong University, Seoul, Republic of Korea.

Published: August 2022

AI Article Synopsis

Article Abstract

Background: The Z-type variant of human α-antitrypsin is involved in liver cirrhosis and pulmonary emphysema. Due to its slow folding characteristics, this variant accumulates folding intermediates and forms protein aggregates within hepatocytes. Misfolded proteins may induce oxidative stress and subsequent cell death.

Objective: The potential application of antioxidant response signaling pathway and antioxidants to cope with Z-type α-antitrypsin-induced oxidative stress was evaluated.

Methods: Overexpression of Z-type α-antitrypsin in Saccharomyces cerevisiae provoked oxidative stress and increased susceptibility to oxidative challenges such as hydrogen peroxide treatment. Deletion of antioxidant-response genes, including yap1, skn7, sod2, tsa1, and pst2, exacerbated the slow growth phenotype of Z-type α-antitrypsin-expressing cells. Antioxidant treatment alleviated oxidative stress and cytotoxicity induced by Z-type α-antitrypsin.

Results: Our results show that cellular antioxidant capacity is crucial to protection against misfolded Z-type α-antitrypsin.

Conclusion: The information obtained here may be used to prevent oxidative stress caused by misfolded proteins, which are associated with several degenerative diseases, including amyotrophic lateral sclerosis and Parkinson's disease.

Download full-text PDF

Source
http://dx.doi.org/10.2174/0929866529666220321151913DOI Listing

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