Protective effects of the antioxidant extract collected from Styela clava tunics on UV radiation‑induced skin aging in hairless mice

  • Authors:
    • Eun Kyoung Koh
    • Ji Eun Kim
    • Jun Go
    • Sung Hwa Song
    • Ji Eun Sung
    • Hong Joo Son
    • Young Jin Jung
    • Bae Hwan Kim
    • Young Suk Jung
    • Dae Youn Hwang
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  • Published online on: September 19, 2016     https://doi.org/10.3892/ijmm.2016.2740
  • Pages: 1565-1577
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Abstract

Ultraviolet (UV) radiation is considered a primary cause of skin damage, which is characterized by deep wrinkles, roughness, laxity and pigmentation through oxidative stress and oxidative photodamage. To examine the therapeutic effects of ethanol extract of Styela clava tunics (EtSCT) on UV radiation-induced skin aging in hairless mice, alterations in skin phenotype, histological structures, inflammation, endoplasmic reticulum (ER) stress, oxidative conditions and toxicity were investigated during 13 weeks of UV irradiation and topical application of EtSCT. EtSCT showed high reducing power (3.1%), 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity (92.7%) and NO scavenging activity (15.6%) due to its high total flavonoids (15.3 mg/ml) and total phenolics (36.8 mg/ml). The topical application of EtSCT suppressed photoaging of the skin of UV-irradiated mice, and this was demonstrated by the inhibition of wrinkle formation, the suppression of the erythema index as well as the prevention of transepidermal water loss. Additionally, the epidermal thickness and adipocytes number were recovered to a similar level as that in the no radiation group in the UV + EtSCT‑treated groups compared with the UV + vehicle‑treated group, and the expression of collagen I increased. The attenuation of mitogen‑activated protein kinase and ER stress signaling pathways activated by reactive oxygen species was also detected in the UV + EtSCT‑treated group. Inflammatory responses including the infiltration of mast cells, CD31 expression and interleukin-6 secretion were significantly lower in the UV + EtSCT-treated groups. Moreover, the concentration of malondialdehyde was reduced and the activity of superoxide dismutase was effectively recovered in the UV + EtSCT-treated groups compared with that in the vehicle-treated groups. Liver and kidney toxicity factors were maintained at a constant level. These results suggest that EtSCT has the potential for use as therapeutic drug which protects against skin aging by regulating the skin morphology, histopathological structures, ER stress, inflammation and oxidative conditions.
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November-2016
Volume 38 Issue 5

Print ISSN: 1107-3756
Online ISSN:1791-244X

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Spandidos Publications style
Koh EK, Kim JE, Go J, Song SH, Sung JE, Son HJ, Jung YJ, Kim BH, Jung YS, Hwang DY, Hwang DY, et al: Protective effects of the antioxidant extract collected from Styela clava tunics on UV radiation‑induced skin aging in hairless mice. Int J Mol Med 38: 1565-1577, 2016
APA
Koh, E.K., Kim, J.E., Go, J., Song, S.H., Sung, J.E., Son, H.J. ... Hwang, D.Y. (2016). Protective effects of the antioxidant extract collected from Styela clava tunics on UV radiation‑induced skin aging in hairless mice. International Journal of Molecular Medicine, 38, 1565-1577. https://doi.org/10.3892/ijmm.2016.2740
MLA
Koh, E. K., Kim, J. E., Go, J., Song, S. H., Sung, J. E., Son, H. J., Jung, Y. J., Kim, B. H., Jung, Y. S., Hwang, D. Y."Protective effects of the antioxidant extract collected from Styela clava tunics on UV radiation‑induced skin aging in hairless mice". International Journal of Molecular Medicine 38.5 (2016): 1565-1577.
Chicago
Koh, E. K., Kim, J. E., Go, J., Song, S. H., Sung, J. E., Son, H. J., Jung, Y. J., Kim, B. H., Jung, Y. S., Hwang, D. Y."Protective effects of the antioxidant extract collected from Styela clava tunics on UV radiation‑induced skin aging in hairless mice". International Journal of Molecular Medicine 38, no. 5 (2016): 1565-1577. https://doi.org/10.3892/ijmm.2016.2740