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Article

Proteomic Analysis of Circulating Extracellular Vesicles Identifies Potential Biomarkers for Lymph Node Metastasis in Oral Tongue Squamous Cell Carcinoma

1
Department of Otorhinolaryngology, Head and Neck Surgery, The Chinese University of Hong Kong, Sha Tin, Hong Kong, China
2
State Key Laboratory of Agrobiotechnology, School of Life Sciences, The Chinese University of Hong Kong, Sha Tin, Hong Kong, China
3
Department of Neuroscience, Jockey Club College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Kowloon Tong, Hong Kong, China
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Department of Biomedical Sciences, Jockey Club College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Kowloon Tong, Hong Kong, China
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Ben May Department for Cancer Research, Pritzker School of Molecular Engineering, The University of Chicago, 929 East 57th Street, Chicago, IL 60637, USA
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Department of Pathology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pok Fu Lam, Hong Kong, China
*
Author to whom correspondence should be addressed.
Academic Editors: Fabrizio Fontana, Maria Felice Brizzi and Priya Samuel
Cells 2021, 10(9), 2179; https://doi.org/10.3390/cells10092179
Received: 14 July 2021 / Revised: 10 August 2021 / Accepted: 20 August 2021 / Published: 24 August 2021
Lymph node metastasis is the most reliable indicator of a poor prognosis for patients with oral tongue cancers. Currently, there are no biomarkers to predict whether a cancer will spread in the future if it has not already spread at the time of diagnosis. The aim of this study was to quantitatively profile the proteomes of extracellular vesicles (EVs) isolated from blood samples taken from patients with oral tongue squamous cell carcinoma with and without lymph node involvement and non-cancer controls. EVs were enriched using size exclusion chromatography (SEC) from pooled plasma samples of patients with non-nodal and nodal oral tongue squamous cell carcinoma (OTSCC) and non-cancer controls. Protein cargo was quantitatively profiled using isobaric labelling (iTRAQ) and two-dimensional high-performance liquid chromatography followed by tandem mass spectrometry. We identified 208 EV associated proteins and, after filtering, generated a short list of 136 proteins. Over 85% of the EV-associated proteins were associated with the GO cellular compartment term “extracellular exosome”. Comparisons between non-cancer controls and oral tongue squamous cell carcinoma with and without lymph node involvement revealed 43 unique candidate EV-associated proteins with deregulated expression patterns. The shortlisted EV associated proteins described here may be useful discriminatory biomarkers for differentiating OTSCC with and without nodal disease or non-cancer controls. View Full-Text
Keywords: extracellular vesicles; oral tongue squamous cell carcinoma; lymph node metastases; proteomics; biomarkers extracellular vesicles; oral tongue squamous cell carcinoma; lymph node metastases; proteomics; biomarkers
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MDPI and ACS Style

Qu, X.; Leung, T.C.N.; Ngai, S.-M.; Tsai, S.-N.; Thakur, A.; Li, W.-K.; Lee, Y.; Leung, L.; Ng, T.-H.; Yam, J.; Lan, L.; Lau, E.H.L.; Wong, E.W.Y.; Chan, J.Y.K.; Meehan, K. Proteomic Analysis of Circulating Extracellular Vesicles Identifies Potential Biomarkers for Lymph Node Metastasis in Oral Tongue Squamous Cell Carcinoma. Cells 2021, 10, 2179. https://doi.org/10.3390/cells10092179

AMA Style

Qu X, Leung TCN, Ngai S-M, Tsai S-N, Thakur A, Li W-K, Lee Y, Leung L, Ng T-H, Yam J, Lan L, Lau EHL, Wong EWY, Chan JYK, Meehan K. Proteomic Analysis of Circulating Extracellular Vesicles Identifies Potential Biomarkers for Lymph Node Metastasis in Oral Tongue Squamous Cell Carcinoma. Cells. 2021; 10(9):2179. https://doi.org/10.3390/cells10092179

Chicago/Turabian Style

Qu, Xinyu, Thomas C.N. Leung, Sai-Ming Ngai, Sau-Na Tsai, Abhimanyu Thakur, Wing-Kar Li, Youngjin Lee, Leanne Leung, Tung-Him Ng, Judy Yam, Linlin Lan, Eric H.L. Lau, Eddy W.Y. Wong, Jason Y.K. Chan, and Katie Meehan. 2021. "Proteomic Analysis of Circulating Extracellular Vesicles Identifies Potential Biomarkers for Lymph Node Metastasis in Oral Tongue Squamous Cell Carcinoma" Cells 10, no. 9: 2179. https://doi.org/10.3390/cells10092179

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