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Updated: Jun 3, 2026

Use of Two Dimensional Semi-denaturing Detergent Agarose Gel Electrophoresis to Confirm Size Heterogeneity of Amyloid or Amyloid-like Fibers
Published on: April 26, 2018
Amyloid-like fibrils are not detected in non-small cell lung cancer tissue samples
Luiz Henrique de Lima Araújo1, Luciana W Pinto, Luciene F Schluckebier
1Clinical Research Coordination, Brazilian National Cancer Institute (INCA)-CPQ, Rua André Cavalcanti, 37, 5 Andar, Rio de Janeiro 20231-050, Brazil.
Abstract:
Some proteins, canonically not associated with amyloid diseases, can aggregate into amyloid-like fibrils under special conditions. Our group hypothesized that stressful cancer microenvironment might induce the formation of insoluble deposits of p53 mutant protein. A cohort of 28 non-small cell lung cancer (NSCLC) patients was used to test the aforementioned hypothesis. Tumor specimens were assessed for TP53 mutations using DNA sequencing and for amyloid formation by Congo red staining. TP53 mutations were present in 57% of patients, whereas no amyloid deposits were detected in tissue sections under polarized light microscopy. Mutant p53 proteins are not associated with the appearance of amyloid-like fibrils in NSCLC samples, and DNA sequencing remains the standard method to detect such abnormality.
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