Filter trapping protocol to detect aggregated proteins in human cell lines.
STAR Protoc 2022;
3:101571. [PMID:
35880124 PMCID:
PMC9307672 DOI:
10.1016/j.xpro.2022.101571]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
The loss of protein homeostasis results in cytotoxic protein aggregates, a common hallmark of aging and neurological diseases. Here, we present an adjusted filter-trapping assay protocol to detect global aggregated proteins in human cell lines, via a high-sensitive protein staining method. This protocol also details an alternative approach to monitor specific protein aggregates trapped in the filter membrane, by subsequent immunoblotting of ectopically expressed and endogenous proteins.
For complete details on the use and execution of this protocol, please refer to Chhipi-Shrestha et al. (2022).
Trapping SDS-resistant protein aggregates on a cellulose acetate membrane
Total protein staining on the filter membrane with high sensitivity
Immunoprobing specific aggregated proteins on the filter membrane
Publisher’s note: Undertaking any experimental protocol requires adherence to local institutional guidelines for laboratory safety and ethics.
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