Differential extracellular vesicle concentration and biomarker expression of integrin αv/β5, EpCAM, and glypican-1 in pancreatic cancer models - research summary

Q: Why are EVs considered promising biomarkers for pancreatic cancer?

Tumor-derived EVs participate in cancer development and progression and can carry disease-associated molecules. Their profiles can potentially enable cancer-specific biomarker identification through liquid biopsy approaches.

Q: What main technical problem limits EV biomarker quantification?

EV heterogeneity in size and concentration makes accurate measurement difficult, and results depend strongly on the isolation and quantification methods used.

Q: How did the study handle variability from isolation and quantification methods?

It compared three EV isolation techniques and two quantification methods, observing concentration differences of about 1.5-fold between quantification approaches while seeing consistent EV quantities and size distributions across isolation techniques.

Sep 21, 2026

Uploaded by Maeve

Tumor-derived extracellular vesicles (EVs) are explored as biomarkers for pancreatic cancer, but their usefulness is limited by heterogeneity in size and concentration and by dependence on isolation and quantification workflows. This study compared three EV isolation methods and two quantification methods, finding about a 1.5-fold variation in EV concentration by quantification approach while preserving consistent EV quantities and size distributions across isolation techniques. Pancreatic cancer sources showed increased total EV amounts and at least 3-fold rises in several EV biomarkers.

LanguageEnglish

CategoryResearch & Report

FormatPDF

Pages8

Reading Time20 min

AccessFree to download

Background

EV heterogeneity and biomarker quantification

EV function and EV signature concept

Biomarker targets in EVs

Known EV biomarkers in cancers

Integrin and related EV surface signatures

Study design and observations

Comparison of EV isolation and quantification methods

Differences in EV concentration and total EV amounts

Implications

EV profiling for pancreatic cancer biomarker identification

[www. nature.com/scientificreports](www. nature.com/scientificreports) OPEN Differential extracellular vesicle concentration and their biomarker expression of integrin αv/β5, EpCAM, and glypican‑1 in pancreatic cancer models Reed Jacobson1,2, Sangdeuk Ha2, SakurakoTani1, Shrinwanti Ghosh2, Yagna P. R. Jarajapu 3,4, Randall E. Brand 5, Jiha Kim2,4* & Yongki Choi1,4* Tumor‑derived extracellular vesicles (EVs) show great potential as biomarkers for several diseases, including pancreatic cancer, due to their roles in cancer development and progression. However, the challenge of utilizing EVs as biomarkers lies in their inherent heterogeneity in terms of size and concentration, making accurate quantification difficult, which is highly dependent on the isolation and quantification methods used. In our study, we compared three EV isolation techniques and two EV quantification methods. We observed variations in EV concentration, with approximately 1.5‑fold differences depending on the quantification method used. Interestingly, all EV isolation techniques consistently yielded similar EV quantities, overall size distribution, and modal sizes. In contrast, we found a notable increase in total EV amounts in samples from pancreatic cancer cell lines, mouse models, and patient plasma, compared to non‑cancerous conditions. Moreover, individual tumor‑ derived EVs exhibited at least a 3‑fold increase in several EV biomarkers. Our data, obtained from EVs isolated using various techniques and quantified through different methods, as well as originating from various pancreatic cancer models, suggests that EV profiling holds promise for the identification of unique and cancer‑specific biomarkers in pancreatic cancer. Cell-released lipid-bilayer extracellular vesicles (EVs) contain diverse molecules such as lipids, proteins, and nucleic acids, including endosome-origin small EVs (< 200 nm) known as exosomes 1–6. EVs are believed to provide a means of intercellular communication and the transfer of macromolecules between cells, as well as implicated as contributing factors in the development of several diseases including cancer3. During the process of intercellular transmission, EVs either fuse with the plasma membranes of target cells or engage in interactions between surface proteins of EVs and receptors on recipient cells to deliver their contents including mRNA, miRNA, and DNA3,7,8, and initiate intercellular signaling3,9. As a result, the surface proteins of EVs and their contents have been considered critical factors in the identification of ‘disease-specific’ EV signatures. Extensive research efforts have been dedicated to uncovering unique EV biomarkers. For example, several membrane-bound proteins, such as macrophage migration inhibition factor10, 11, glypican-1 (GPC-1)12, 13, tetraspanins14, 15, and epithelial cell adhesion molecules (EpCAM)14, 16, have been found to exhibit overexpression in circulating EVs associated with various types of cancer. Furthermore, recent proteomic analyses have identified distinct integrin (ITG) expression patterns on EVs related to tumor development and tropism for metastasis17. Remarkably, EVs isolated from the serum of pancreatic and breast cancer patients have shown elevated levels ofITGαv (αvβ3, αvβ5) and ITGα6 (α6β1, α6β4), respectively17. These tumor-derived EVs serve critical roles in promoting cancer growth and facilitating metastasis by creating premetastatic niches that enhance organ-specific metastasis and redirect the distribution of metastatic cells7, 12, 18, 19. Moreover, it has been shown that EV levels in serum increase early in the pancreatic intraepithelial neoplasia stage, preceding the formation of primary tumors 1Departments of Physics, North Dakota State University, Fargo, ND 58108, USA. 2Biological Sciences, North Dakota State University, Fargo, ND 58108, USA. 3Pharmaceutical Sciences, North Dakota State University, Fargo, ND 58108, USA. 4Molecular and Cellular Biology Pr

FAQs

Why are EVs considered promising biomarkers for pancreatic cancer?

Tumor-derived EVs participate in cancer development and progression and can carry disease-associated molecules. Their profiles can potentially enable cancer-specific biomarker identification through liquid biopsy approaches.

What main technical problem limits EV biomarker quantification?

EV heterogeneity in size and concentration makes accurate measurement difficult, and results depend strongly on the isolation and quantification methods used.

How did the study handle variability from isolation and quantification methods?

It compared three EV isolation techniques and two quantification methods, observing concentration differences of about 1.5-fold between quantification approaches while seeing consistent EV quantities and size distributions across isolation techniques.

Sep 21, 2026

Uploaded by Maeve