Internalization of extracellular vesicles of cancer patients by peripheral blood mononuclear cells during polychemotherapy: connection with neurotoxicity

  
Yunusova N.V.1, Kaigorodova E.V.1, Panfilova P.A.2 , Popova N.O.3, Udintseva I.N.3, Kondakova I.V.3, Svarovsky D.A.1, Goldberg V.E.3

1. Cancer Research Institute, Tomsk National Research Medical Center, Russian Academy of Sciences, Tomsk, Russia; Siberian State Medical University, Tomsk, Russia
2. Siberian State Medical University, Tomsk, Russia
3. Cancer Research Institute, Tomsk National Research Medical Center, Russian Academy of Sciences, Tomsk, Russia
Section: Clinical and Diagnostic Research
DOI: 10.18097/PBMC20247004240      PubMed Id: 39239898
Year: 2024  Volume: 70  Issue: 4  Pages: 240-247
Extracellular vesicles (EVs), exhibiting their functional activity after internalization by recipient cells, are involved in the pathogenesis of drug-induced polyneuropathy (DIPN), a common complication of antitumor therapy. In this work, the internalization of EVs obtained from colorectal cancer patients undergoing polychemotherapy and its relationship with neurotoxicity were assessed using a model system of mononuclear leukocytes. Circulating EVs were isolated from 8 colorectal cancer patients who received antitumor therapy according to the FOLFOX or XELOX regimens before the start of chemotherapy (point 1) and after 3–4 courses (point 2). Mononuclear leukocytes of a healthy donor served as a cellular model system for EV internalization in vitro. EV internalization was assessed using fluorescence microscopy. It was shown that internalization of EVs obtained from colorectal cancer patients with high neurotoxicity was higher than in the group with low neurotoxicity. The ability of CD11b-positive (CD11b⁺) and CD11b-negative (CD11b⁻) mononuclear leukocytes of a healthy donor to internalize EVs obtained from patients before and after chemotherapy did not reveal significant differences. A direct relationship was found between the relative number of CD11b⁻ cells with internalized EVs and the integral index of neurotoxicity according to the NRS scale at the peak of its manifestation (point 2) (r=0.675, p<0.05). By the end of 3–4 courses of polychemotherapy using FOLFOX or XELOX regimens, a tendency towards an increase in the relative number of peripheral blood mononuclear leukocytes (the sum of CD11b⁺ and CD11b⁻ cells) with internalized EVs with increased manifestations of DIPN in patients with colorectal cancer was observed.
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Keywords: extracellular vesicles, internalization, peripheral blood mononuclear cells, colorectal cancer, polychemotherapy, drug-induced polyneuropathy
Citation:

Yunusova, N. V., Kaigorodova, E. V., Panfilova, P. A., Popova, N. O., Udintseva, I. N., Kondakova, I. V., Svarovsky, D. A., Goldberg, V. E. (2024). Internalization of extracellular vesicles of cancer patients by peripheral blood mononuclear cells during polychemotherapy: connection with neurotoxicity. Biomeditsinskaya Khimiya, 70(4), 240-247.
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