Fatty Acid Unsaturation Degree of Plasma Exosomes in Colorectal Cancer Patients: A Promising Biomarker

International Journal of Molecular Sciences

Rebeca Reigada¹  Paloma de la Torre¹  José Reyes¹  Joan Bestard-Escalas¹  Gerhard Liebisch²  Gwendolyn Barceló-Coblijn³ 

[1] Health Research Institute of the Balearic Islands (IdISBa), 07120 Palma, Spain;Institute of Clinical Chemistry and Laboratory Medicine, University Hospital Regensburg, 93042 Regensburg, Germany;Research Unit, University Hospital Son Espases, 07120 Palma, Spain;

关键词: exosomes;    lipidome;    colorectal cancer;    monounsaturated fatty acids;    polyunsaturated fatty acids;   

DOI  :  10.3390/ijms22105060

来源: DOAJ

【 摘 要 】

Even though colorectal cancer (CRC) is one of the most preventable cancers, it is currently one of the deadliest. Worryingly, incidence in people <50 years has increased unexpectedly, and for unknown causes, despite the successful implementation of screening programs in the population aged >50 years. Thus, there is a need to improve early diagnosis detection strategies by identifying more precise biomarkers. In this scenario, the analysis of exosomes is given considerable attention. Previously, we demonstrated the exosome lipidome was able to classify CRC cell lines according to their malignancy. Herein, we investigated the use of the lipidome of plasma extracellular vesicles as a potential source of non-invasive biomarkers for CRC. A plasma exosome-enriched fraction was analyzed from patients undergoing colonoscopic procedure. Patients were divided into a healthy group and four pathological groups (patients with hyperplastic polyps; adenomatous polyps; invasive neoplasia (CRC patients); or hereditary non-polyposis CRC. The results showed a shift from 34:1- to 38:4-containing species in the pathological groups. We demonstrate that the ratio Σ34:1-containing species/Σ38:4-containing species has the potential to discriminate between healthy and pathological patients. Altogether, the results reinforce the utility of plasma exosome lipid fingerprint to provide new non-invasive biomarkers in a clinical context.

【 授权许可】

Unknown