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Journal of Chinese Pharmaceutical Sciences ›› 2016, Vol. 25 ›› Issue (9): 690-694.DOI: 10.5246/jcps.2016.09.077

• Original articles • Previous Articles     Next Articles

Effect of Curcuma longa L. extract on the AP1 expression in rat cochlear fibroblasts under noise conditions

Tengku Siti Hajar Haryuna1*, Ramsi Lutan1, Faathir Agung Ainul Taufika1, Ratna Anggraeni2, Tengku Siti Harilza Zubaidah3   

  1. 1. Department of Otorhinolaryngology, Faculty of Medicine, University of North Sumatera, Medan 20155, Indonesia
    2. Department of Otorhinolaryngology, Faculty of Medicine, Padjadjaran University, Bandung 45363, Indonesia
    3. Department of Ophthalmology, Faculty of Medicine, University of North Sumatera, Medan 20155, Indonesia
  • Received:2016-03-30 Revised:2016-04-25 Online:2016-09-28 Published:2016-05-15
  • Contact: Tel.: +628126061694, +6282167578676, E-mail: tengkusitihajarharyuna@gmail.com
  • Supported by:

    Daftar Isian Pelaksanaan Anggaran (DIPA) 2014 (Grant No. 4806/UN5.1.R/KEU/2014) Universitas Sumatera Utara.

Abstract:

Noise-induced cellular stress can cause damage to fibroblasts within the cochlear supporting tissues and lateral wall. In the present study, we aimed to evaluate the role of curcumin as the safe and effective therapeutic agent in the prevention and treatment of this condition according to the expression of activator protein-1 (AP1). A total of 24 Rattus norvegicus were randomly divided into four groups (n = 6). Group 1: control; group 2: noise (+); group 3: noise (+), 50 mg/day curcumin (+); group 4: noise (+), 100 mg/day curcumin (+). All groups (except for group 1) were subjected to a sound pressure level (SPL) of 100 dB for 2 h/day during 2 weeks. Curcumin used in this study was derived from Curcuma longa L. (Turmeric), and it was orally administered for 2 weeks. All samples were immunohistochemistrically examined for the expression of AP1 in cochlear fibroblasts. The results showed that there were significant differences for the AP1 expression (P<0.05) among all groups, except for between groups 1 and 3, or between groups 1 and 4. Our data proved that curcumin was potentially effective in the prevention and treatment of damage of fibroblasts within the cochlear supporting tissues and lateral wall due to the decreased AP1 expression following noise exposure.

Key words: Noise, Curcumin, AP1, Fibroblast, Cochlea

CLC Number: 

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