Senescent RAW264.7 cells exhibit increased production of nitric oxide and release inducible nitric oxide synthase in exosomes

  • Authors:
    • Hirokazu Hattori
    • Kazuki Takaoka
    • Miho Ueta
    • Masayuki Oshitani
    • Joji Tamaoka
    • Kazuma Noguchi
    • Hiromitsu Kishimoto
  • View Affiliations

  • Published online on: July 27, 2021     https://doi.org/10.3892/mmr.2021.12320
  • Article Number: 681
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Abstract

Aging cells not only cease growing, but also secrete various proteins such as inflammatory cytokines. This secretory phenomenon is known as the senescence‑associated secretory phenotype (SASP). The aim of the present study was to elucidate the effects of senescence on the differentiation of osteoclast precursors (OCPs) and corresponding SASP. RAW264.7 cells were used as OCPs and were cultured to passage (P)5, P10 and P20. Cell proliferation assays, senescence‑associated β‑galactosidase staining and telomere length quantification were subsequently performed, and it was revealed that replicative senescence was induced at P20. In addition, the level of tartrate‑resistant acid phosphatase activity in P20 cells treated with receptor activator of nuclear factor‑κB ligand was significantly lower than that in P5 and P10 cells. The SASP factors interleukin‑6, tumour necrosis factor‑α and nitric oxide were significantly increased in P20 culture supernatants compared with those in P5 and P10 supernatants. Furthermore, the number of exosomes at P20 was increased compared with that at P5 and P10, and inducible nitric oxide synthase (iNOS) was expressed in exosomes at P20, but not in exosomes at P5. In conclusion, the present study revealed that senescent RAW264.7 cells exhibit increased expression of SASP factors and release iNOS in exosomes.
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September-2021
Volume 24 Issue 3

Print ISSN: 1791-2997
Online ISSN:1791-3004

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Spandidos Publications style
Hattori H, Takaoka K, Ueta M, Oshitani M, Tamaoka J, Noguchi K and Kishimoto H: Senescent RAW264.7 cells exhibit increased production of nitric oxide and release inducible nitric oxide synthase in exosomes. Mol Med Rep 24: 681, 2021
APA
Hattori, H., Takaoka, K., Ueta, M., Oshitani, M., Tamaoka, J., Noguchi, K., & Kishimoto, H. (2021). Senescent RAW264.7 cells exhibit increased production of nitric oxide and release inducible nitric oxide synthase in exosomes. Molecular Medicine Reports, 24, 681. https://doi.org/10.3892/mmr.2021.12320
MLA
Hattori, H., Takaoka, K., Ueta, M., Oshitani, M., Tamaoka, J., Noguchi, K., Kishimoto, H."Senescent RAW264.7 cells exhibit increased production of nitric oxide and release inducible nitric oxide synthase in exosomes". Molecular Medicine Reports 24.3 (2021): 681.
Chicago
Hattori, H., Takaoka, K., Ueta, M., Oshitani, M., Tamaoka, J., Noguchi, K., Kishimoto, H."Senescent RAW264.7 cells exhibit increased production of nitric oxide and release inducible nitric oxide synthase in exosomes". Molecular Medicine Reports 24, no. 3 (2021): 681. https://doi.org/10.3892/mmr.2021.12320