Comparison of redox parameters in ovarian endometrioma and its malignant transformation

Fujimoto,Yoshikatsu; Imanaka,Shogo; Yamada,Yuki; Ogawa,Kenji; Ito,Fuminori; Kawahara,Naoki; Yoshimoto,Chiharu; Kobayashi,Hiroshi

doi:10.3892/ol.2018.9242

Comparison of redox parameters in ovarian endometrioma and its malignant transformation

Authors:
- Yoshikatsu Fujimoto
- Shogo Imanaka
- Yuki Yamada
- Kenji Ogawa
- Fuminori Ito
- Naoki Kawahara
- Chiharu Yoshimoto
- Hiroshi Kobayashi
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Affiliations: Department of Obstetrics and Gynecology, Japan Community Health Care Organization Yamato Koriyama, Yamato Koriyama, Nara 634‑1013, Japan, Department of Obstetrics and Gynecology, Nara Medical University, Kashihara, Nara 634‑8522, Japan, Department of Obstetrics and Gynecology, Nara Prefecture General Medical Center, Nara 631‑0846, Japan
Published online on: July 31, 2018 https://doi.org/10.3892/ol.2018.9242
Pages: 5257-5264

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Abstract

The present study aimed to evaluate the levels of oxidative stress and antioxidant markers in benign endometrioma (OE) and its malignant transformation [endometriosis‑associated ovarian cancer (EAOC)] by measuring 8‑hydroxy‑2‑deoxyguanosine (8‑OHdG), heme oxygenase‑1 (HO‑1) and total antioxidant capacity (TAC/Heme‑iron) alterations associated with disease progression. Cyst fluid samples from 44 patients with OE and 14 patients with EAOC were studied using an enzyme‑linked immunosorbent assay. A χ2 test, t‑test and Pearson correlation test were performed using SPSS version 22.0. The cut‑off point, sensitivity and specificity of each marker for EAOC diagnosis were evaluated by receiver operating characteristic curve analysis. Cyst fluid 8‑OHdG and HO‑1 levels in the EAOC group were significantly decreased compared with the OE subjects (P=0.013 and P<0.001, respectively). The levels of TAC/Heme‑iron in patients with EAOC were significantly higher compared with those in the OE subjects (P<0.001). The present study demonstrated a positive correlation between 8‑OHdG and HO‑1 levels (P=0.012). HO‑1 exhibited the highest discriminant value for EAOC (Area Under the Curve=0.901). The optimal cut‑off point of HO‑1 for the diagnosis of EAOC was 2.314 ng/ml, with a sensitivity and specifity of 95.2 and 85.7%, respectively. The present study revealed a clear separation between the overall redox state in OE and EAOC. It was concluded that characteristic alterations in important factors in redox may be helpful for understanding the pathogenesis of the malignant transformation of endometriosis.

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