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핵의학
- 2019년 02월호
[Biomaterials.] 인터루킨-15가 면역치료효과 증진시킴Enhancement of antitumor potency of extracellular vesicles derived from natural killer cells by IL-15 priming.경북의대 / Liya Zhu, 안병철*
- 출처
- Biomaterials.
- 등재일
- 2019 Jan
- 저널이슈번호
- 190-191:38-50. doi: 10.1016/j.biomaterials.2018.10.034. Epub 2018 Oct 29.
- 내용
Abstract
PURPOSE:
Natural killer (NK) cells are the key subset of innate-immunity lymphocytes; they possess antitumor activities and are used for cancer immunotherapy. In a previous study, extracellular vehicles (EVs) from NK-92MI cells were isolated and exploited for their ability to kill human cancer cells in vitro and in vivo (multiple injection methods). Here, the potential of NK-cell-derived EVs (NK-EVs) for immunotherapy was improved by priming with interleukin (IL)-15.METHODS:
NK-EVs were isolated from the culture medium without or with IL-15 (NK-EVsIL-15) by ultracentrifugation and were purified via density gradient ultracentrifugation. In addition, NK-EVs and NK-EVsIL-15 were characterized by transmission electron microscopy, nanoparticle-tracking analysis, and western blotting. Flow cytometry, bioluminescence imaging, and a 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay were performed for apoptosis, protein expression, cell proliferation, and cytotoxicity analyses. Furthermore, xenograft tumor-bearing mice were injected with PBS, NK-EVs, or NK-EVsIL-15 intravenously five times. Tumor growth was monitored using calipers and bioluminescence imaging. Toxicity of the nanoparticles was evaluated by measuring the body weight of the mice.RESULTS:
NK-EVsIL-15 showed significantly higher cytolytic activity toward human cancer cell lines (glioblastoma, breast cancer, and thyroid cancer) and simultaneously increased the expression of molecules associated with NK-cell cytotoxicity. When compared with NK-EVs, NK-EVsIL-15 significantly inhibited the growth of glioblastoma xenograft cells in mice. In addition, both NK-EVs and NK-EVsIL-15 were not significantly toxic to either normal cells or mice.CONCLUSION:
IL-15 may improve the immunotherapeutic effects of NK-EVs, thus improving the applications of NK-EVs in the future.
Author informationZhu L1, Kalimuthu S1, Oh JM1, Gangadaran P1, Baek SH1, Jeong SY1, Lee SW1, Lee J1, Ahn BC2.
1
Department of Nuclear Medicine, School of Medicine, Kyungpook National University, Kyungpook National University Hospital, Daegu 41944, South Korea.
2
Department of Nuclear Medicine, School of Medicine, Kyungpook National University, Kyungpook National University Hospital, Daegu 41944, South Korea. Electronic address: abc2000@knu.ac.kr.
- 키워드
- Extracellular vesicles; Glioblastoma; IL-15; Immunotherapy; NK cells; Tumor targeting
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편집위원
최근의 트렌드인 면역치료와 관련된 연구가 흥미롭고 더 활성화 되면 좋을 것 같습니다.
덧글달기닫기2019-02-22 17:20:41
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