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Infrared biomarkers of impaired cystic fibrosis transmembrane regulator protein biogenesis

DOI: 10.1002/jbio.201900174 DOI Help

Authors: Giuseppe Bellisola (Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali di Frascati) , Sara Caldrer (IRCSS Sacro Cuore - Don Calabria, Centro Malattie Tropicali) , Mariangela Cestelli-Guidi (Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali di Frascati) , Gianfelice Cinque (Diamond Light Source)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Journal Of Biophotonics

State: Published (Approved)
Published: October 2019
Diamond Proposal Number(s): 9056 , 8474

Abstract: The mid‐infrared (IR) spectra of human cystic fibrosis (CF) cells acquired by Fourier transform infrared microspectroscopy (microFTIR) were compared to those of non‐CF cells. Within the 1700‐1480cm‐1 spectral domain of amides, unsupervised explorative principal component analysis identified a few variables reflecting quantitative and qualitative vibrations arising from protein secondary structures and amino acid side chains. Their pattern reflected α‐helix to β‐sheet transitions in bronchial epithelial cells and in immortalized peripheral blood mononuclear cells from patients with R1162X missense or in‐frame F508del mutations in the cystic fibrosis transmembrane regulator gene (Cftr). Similar transitions have been described in IR spectra of cells, tissues and body fluids of patients affected with some neurodegenerative diseases characterized by the accumulation of misfolded protein aggregates. The variables pattern was able to distinguish CF cells from non‐CF cells and was modified by molecular compounds used to rescue the unbalanced folding process of mutated cystic fibrosis transmembrane regulator (CFTR) anion channel. To our knowledge, this is the first experimental evidence of spectroscopic biomarkers of the impaired biogenesis of CFTR by IR microanalysis in the spectra of human CF bronchial epithelial and lymphoblasotid cells.

Journal Keywords: cystic fibrosis ‐ CF; cystic fibrosis transmembrane regulator ‐ CFTR; F508del mutation; Fourier transform infrared microspectroscopy ‐ microFTIR; infrared ‐ IR; principal component analysis ‐ PCA; protein folding; synchrotron radiation

Diamond Keywords: Cystic Fibrosis

Subject Areas: Biology and Bio-materials


Instruments: B22-Multimode InfraRed imaging And Microspectroscopy

Added On: 28/10/2019 10:22

Discipline Tags:

Life Sciences & Biotech Biophysics Health & Wellbeing Non-Communicable Diseases

Technical Tags:

Spectroscopy Infrared Spectroscopy Synchtron-based Fourier Transform Infrared Spectroscopy (SR-FTIR)