2. Academic Validation
  3. Exogenous nitric oxide stimulates the odontogenic differentiation of rat dental pulp stem cells

Exogenous nitric oxide stimulates the odontogenic differentiation of rat dental pulp stem cells

  • Sci Rep. 2018 Feb 21;8(1):3419. doi: 10.1038/s41598-018-21183-6.
Soichiro Sonoda 1 2 3,  Yu-Feng Mei 1 4 5,  Ikiru Atsuta 6,  Atsushi Danjo 7,  Haruyoshi Yamaza 8,  Shion Hama 1 9,  Kento Nishida 1 9,  Ronghao Tang 1 9,  Yukari Kyumoto-Nakamura 1,  Norihisa Uehara 1,  Toshio Kukita 1,  Fusanori Nishimura 2,  Takayoshi Yamaza 10
Affiliations

Affiliations

  • 1 Department of Molecular Cell Biology and Oral Anatomy, Division of Oral Sciences, Kyushu University Graduate School of Dental Science, Fukuoka, Japan.
  • 2 Section of Periodontology, Division of Oral Rehabilitation, Faculty of Dental Science, Kyushu University, Fukuoka, Japan.
  • 3 Research Fellow of Japan Society for the Promotion of Science, Tokyo, Japan.
  • 4 Key Laboratory of Oral Diseases of Jiangsu Province and Stomatological School of Nanjing Medical University, Nanjing, Jiangsu, China.
  • 5 Department of Pediatric and Preventive Dentistry, The Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing, Jiangsu, China.
  • 6 Section of Implant and Rehabilitative Dentistry, Division of Oral Rehabilitation, Faculty of Dental Science, Kyushu University, Fukuoka, Japan.
  • 7 Department of Oral and Maxillofacial Surgery, Faculty of Medicine, Saga University, Saga, Japan.
  • 8 Department of Pediatric Dentistry, Division of Oral Health, Growth & Development, Kyushu University Graduate School of Dental Science, Fukuoka, Japan.
  • 9 Kyushu University School of Dentistry, Fukuoka, Japan.
  • 10 Department of Molecular Cell Biology and Oral Anatomy, Division of Oral Sciences, Kyushu University Graduate School of Dental Science, Fukuoka, Japan. [email protected].
PMID: 29467418 DOI: 10.1038/s41598-018-21183-6
Abstract

Nitric oxide (NO) is thought to play a pivotal regulatory role in dental pulp tissues under both physiological and pathological conditions. However, little is known about the NO functions in dental pulp stem cells (DPSCs). We examined the direct actions of a spontaneous NO gas-releasing donor, NOC-18, on the odontogenic capacity of rat DPSCs (rDPSCs). In the presence of NOC-18, rDPSCs were transformed into odontoblast-like cells with long cytoplasmic processes and a polarized nucleus. NOC-18 treatment increased Alkaline Phosphatase activity and enhanced dentin-like mineralized tissue formation and the expression levels of several odontoblast-specific genes, such as runt related factor 2, dentin Matrix Protein 1 and dentin sialophosphoprotein, in rDPSCs. In contrast, carboxy-PTIO, a NO scavenger, completely suppressed the odontogenic capacity of rDPSCs. This NO-promoted odontogenic differentiation was activated by tumor necrosis factor-NF-κB axis in rDPSCs. Further in vivo study demonstrated that NOC-18-application in a tooth cavity accelerated tertiary dentin formation, which was associated with early nitrotyrosine expression in the dental pulp tissues beneath the cavity. Taken together, the present findings indicate that exogenous NO directly induces the odontogenic capacity of rDPSCs, suggesting that NO donors might offer a novel host DPSC-targeting alternative to current pulp capping agents in endodontics.

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