Abstract
Exosomes are extracellular nanovesicles primarily involved in the pathogenesis of many diseases including cancer. This study was set out from recent evidence that extracellular acidity may increase the exosome release by cancer cells. However, this preliminary evidence did not provide solid information on whether the pH-dependent exosome over-release represents a common feature of all cancers. To the purpose of demonstrating that cancer acidity is a major determinant in inducing an increased exosome release by human cancer cells, we evaluated human tumor cell lines deriving from either colon, breast, prostate cancers, melanoma, or osteosarcoma. All cell lines were cultured in either the current 7.4 pH or the typical pH of cancer that is 6.5. The levels of released extracellular vesicles were measured by protein counts, nanoparticle tracking analysis (NTA), and nanoscale flow cytometry. The results showed that pH 6.5 induced a remarkable increase in exosome release, and buffering the medium significantly reduced the exosome release in all cancers. With these results, we provide, for the first time, evidence that tumor acidity and exosome levels represent common cancer phenotypes.
| Original language | English |
|---|---|
| Journal | Cancers |
| Volume | 10 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - Oct 5 2018 |
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Microenvironmental pH and Exosome Levels Interplay in Human Cancer Cell Lines of Different Histotypes. / Logozzi, Mariantonia; Mizzoni, Davide; Angelini, Daniela F; Di Raimo, Rossella; Falchi, Mario; Battistini, Luca; Fais, Stefano.
In: Cancers, Vol. 10, No. 10, 05.10.2018.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Microenvironmental pH and Exosome Levels Interplay in Human Cancer Cell Lines of Different Histotypes
AU - Logozzi, Mariantonia
AU - Mizzoni, Davide
AU - Angelini, Daniela F
AU - Di Raimo, Rossella
AU - Falchi, Mario
AU - Battistini, Luca
AU - Fais, Stefano
PY - 2018/10/5
Y1 - 2018/10/5
N2 - Exosomes are extracellular nanovesicles primarily involved in the pathogenesis of many diseases including cancer. This study was set out from recent evidence that extracellular acidity may increase the exosome release by cancer cells. However, this preliminary evidence did not provide solid information on whether the pH-dependent exosome over-release represents a common feature of all cancers. To the purpose of demonstrating that cancer acidity is a major determinant in inducing an increased exosome release by human cancer cells, we evaluated human tumor cell lines deriving from either colon, breast, prostate cancers, melanoma, or osteosarcoma. All cell lines were cultured in either the current 7.4 pH or the typical pH of cancer that is 6.5. The levels of released extracellular vesicles were measured by protein counts, nanoparticle tracking analysis (NTA), and nanoscale flow cytometry. The results showed that pH 6.5 induced a remarkable increase in exosome release, and buffering the medium significantly reduced the exosome release in all cancers. With these results, we provide, for the first time, evidence that tumor acidity and exosome levels represent common cancer phenotypes.
AB - Exosomes are extracellular nanovesicles primarily involved in the pathogenesis of many diseases including cancer. This study was set out from recent evidence that extracellular acidity may increase the exosome release by cancer cells. However, this preliminary evidence did not provide solid information on whether the pH-dependent exosome over-release represents a common feature of all cancers. To the purpose of demonstrating that cancer acidity is a major determinant in inducing an increased exosome release by human cancer cells, we evaluated human tumor cell lines deriving from either colon, breast, prostate cancers, melanoma, or osteosarcoma. All cell lines were cultured in either the current 7.4 pH or the typical pH of cancer that is 6.5. The levels of released extracellular vesicles were measured by protein counts, nanoparticle tracking analysis (NTA), and nanoscale flow cytometry. The results showed that pH 6.5 induced a remarkable increase in exosome release, and buffering the medium significantly reduced the exosome release in all cancers. With these results, we provide, for the first time, evidence that tumor acidity and exosome levels represent common cancer phenotypes.
U2 - 10.3390/cancers10100370
DO - 10.3390/cancers10100370
M3 - Article
C2 - 30301144
VL - 10
JO - Cancers
JF - Cancers
SN - 2072-6694
IS - 10
ER -