International Journal of Oral Biology

The Korean Academy of Oral Biology (대한구강생물학회)
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The Inhibition of Oxidative Stress by Chios Gum Mastic is Associated with Autophagy

  • Lee, Bo-Young (Department of Oral Anatomy, School of Dentistry, Pusan National University) ;
  • Lee, Kee-Hyun (Department of Oral Anatomy, School of Dentistry, Pusan National University) ;
  • Kim, In-Ryoung (Department of Oral Anatomy, School of Dentistry, Pusan National University) ;
  • Kim, Yong-Ho (Department of Oral Anatomy, School of Dentistry, Pusan National University) ;
  • Park, Hae-Ryoun (Department of Oral Pathology, School of Dentistry, Pusan National University) ;
  • Park, Bong-Soo (Department of Oral Anatomy, School of Dentistry, Pusan National University)
  • Received : 2014.03.10
  • Accepted : 2014.04.07
  • Published : 2014.06.30
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Abstract

Chios Gum Mastic (CGM) is a natural resin extracted from the leaves of Pistacia lentiscus, a plant endemic to the Greek island of Chios. It has been used by traditional healers, and it has antibacterial, antifungal properties, and therapeutic benefits for the skin. The CGM reduces the formation of dental plaque and bacterial growth in oral saliva, and recent studies have demonstrated the role of antioxidant activity of CGM. Although CGM has been widely investigated, its protective effect against oxidative-damage to keratinocytes, as well as the relationship between CGM and autophagy, has not been investigated. The aim of this study was to assess the protective effect of CGM against $H_2O_2$-induced oxidative stress and to evaluate the autophagic features induced by CGM in human keratinocytes. The pretreatment with CGM significantly reduced apoptosis in $H_2O_2$-exposed HaCaT cells. It promoted the degradation of caspase-3, caspase-8, and caspase-9; and it induced the formation of the processed PARP. The treatment with CGM caused an increase in vesicle formation compared to control group. The level of p62 was reduced and the conversion of LC3-I to LC3-II was increased in CGM treated HaCaT cells. Also, the treatment with CGM increased cleavage of ATG5-ATG12 complex. In summary, CGM helps the cells to survive under stressful conditions by preventing apoptosis and enhancing autophagy. Besides, the present investigation provides evidence to support the antioxidant potential of CGM in vitro and opens up a new horizon for future experiments.

Keywords

References

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