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Article

Altered mitochondrial DNA copy number in cervical exfoliated cells among high‑risk HPV‑positive and HPV‑negative women

  • Authors:
    • Rana Al‑Awadhi
    • Moody Alroomy
    • Salah Al‑Waheeb
    • Materah Salem Alwehaidah
  • View Affiliations / Copyright

    Affiliations: Department of Medical Laboratory Sciences, Faculty of Allied Health Sciences, Kuwait University, Jabriyah 90805, Kuwait, Cytology Laboratory, Maternity Hospital and Mubarak Al‑Kabeer Hospital, Ministry of Health, Kuwait University, Jabriyah 90805, Kuwait
  • Article Number: 521
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    Published online on: September 21, 2023
       https://doi.org/10.3892/etm.2023.12220
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Abstract

The majority of cervical cancer cases are due to human papillomavirus (HPV) infection. However, certain cases of cervical cancer are not caused by HPV. Recent studies have shown a link between altered mitochondrial DNA (mtDNA) copy number, an indicative measure of mitochondrial dysfunction, and cervical cancer in women who test positive for HPV. However, the role of the mtDNA copy number in HPV‑negative cervical cancer has remained elusive. In the present study, the mtDNA copy number was determined using quantitative PCR as the ratio between mtDNA and nuclear DNA in 287 ThinPrep cervical samples, including 143 cases with cervical abnormalities and 144 control subjects with high‑risk (hr)‑HPV positive or HPV‑negative status. In an overall analysis of cases categorized based on the cytology diagnosis into squamous cervical carcinoma/high‑grade squamous intraepithelial lesions (SCC/HSIL), low‑grade squamous intraepithelial lesions (LSIL) and normal controls, the mtDNA copy number was significantly higher in all cases compared to the controls and a higher mtDNA copy number was observed in SCC/HSIL compared to LSIL cases. In the stratification analyses based on hr‑HPV positive and HPV‑negative status, an increased mtDNA copy number was observed in the cases compared with the controls regardless of their HPV status (P<0.05). When cases with cervical abnormalities were categorized based on histological diagnosis into cervical intraepithelial neoplasia (CIN)2/CIN3 and CIN1, an overall analysis indicated an increased mtDNA copy number in CIN2/CIN3 compared to CIN1 (P=0.01). Stratification analyses of these cases based on HPV status revealed a higher mtDNA copy number in CIN2/CIN3 compared to CIN1 regardless of HPV infection (P<0.05). These results showed that an elevated mtDNA copy number in subjects with cervical abnormalities was not influenced by the HPV status and suggested the possibility of its role in the progression of cervical cancer. The increased mtDNA copy number may be an adaptive response mechanism to compensate for mtDNA oxidative stress and energy deficiency, possibly induced by HPV infection and other environmental exposures.
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Copy and paste a formatted citation
Spandidos Publications style
Al‑Awadhi R, Alroomy M, Al‑Waheeb S and Alwehaidah M: Altered mitochondrial DNA copy number in cervical exfoliated cells among high‑risk HPV‑positive and HPV‑negative women. Exp Ther Med 26: 521, 2023.
APA
Al‑Awadhi, R., Alroomy, M., Al‑Waheeb, S., & Alwehaidah, M. (2023). Altered mitochondrial DNA copy number in cervical exfoliated cells among high‑risk HPV‑positive and HPV‑negative women. Experimental and Therapeutic Medicine, 26, 521. https://doi.org/10.3892/etm.2023.12220
MLA
Al‑Awadhi, R., Alroomy, M., Al‑Waheeb, S., Alwehaidah, M."Altered mitochondrial DNA copy number in cervical exfoliated cells among high‑risk HPV‑positive and HPV‑negative women". Experimental and Therapeutic Medicine 26.5 (2023): 521.
Chicago
Al‑Awadhi, R., Alroomy, M., Al‑Waheeb, S., Alwehaidah, M."Altered mitochondrial DNA copy number in cervical exfoliated cells among high‑risk HPV‑positive and HPV‑negative women". Experimental and Therapeutic Medicine 26, no. 5 (2023): 521. https://doi.org/10.3892/etm.2023.12220
Copy and paste a formatted citation
x
Spandidos Publications style
Al‑Awadhi R, Alroomy M, Al‑Waheeb S and Alwehaidah M: Altered mitochondrial DNA copy number in cervical exfoliated cells among high‑risk HPV‑positive and HPV‑negative women. Exp Ther Med 26: 521, 2023.
APA
Al‑Awadhi, R., Alroomy, M., Al‑Waheeb, S., & Alwehaidah, M. (2023). Altered mitochondrial DNA copy number in cervical exfoliated cells among high‑risk HPV‑positive and HPV‑negative women. Experimental and Therapeutic Medicine, 26, 521. https://doi.org/10.3892/etm.2023.12220
MLA
Al‑Awadhi, R., Alroomy, M., Al‑Waheeb, S., Alwehaidah, M."Altered mitochondrial DNA copy number in cervical exfoliated cells among high‑risk HPV‑positive and HPV‑negative women". Experimental and Therapeutic Medicine 26.5 (2023): 521.
Chicago
Al‑Awadhi, R., Alroomy, M., Al‑Waheeb, S., Alwehaidah, M."Altered mitochondrial DNA copy number in cervical exfoliated cells among high‑risk HPV‑positive and HPV‑negative women". Experimental and Therapeutic Medicine 26, no. 5 (2023): 521. https://doi.org/10.3892/etm.2023.12220
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