Tumor Biology

, Volume 37, Issue 6, pp 7565–7572 | Cite as

Plasma DNA integrity index as a potential molecular diagnostic marker for breast cancer

  • Azza M. KamelEmail author
  • Salwa TeamaEmail author
  • Amal Fawzy
  • Mervat El Deftar
Original Article


Plasma DNA integrity index is increased in various malignancies including breast cancer, the most common cancer in women worldwide; early detection is crucial for successful treatment. Current screening methods fail to detect many cases of breast cancer at an early stage. In this study, we evaluated the level of plasma DNA integrity index in 260 females (95 with breast cancer, 95 with benign breast lesions, and 70 healthy controls) to verify its potential value in discriminating malignant from benign breast lesions. The criteria of the American Joint Committee on Cancer were used for staging of breast cancer patients. DNA integrity index was measured by real-time PCR. DNA integrity index was significantly higher in breast cancer than in benign breast patients and healthy subjects (P = <0.001). DNA integrity index is correlated with TNM stage. Given 100 % specificity, the highest sensitivity achieved in detecting cancer group was 85.3 % at 0.55 DNA integrity index cutoff. In conclusion, the plasma DNA integrity index may be a promising molecular diagnostic marker of malignancy in breast lesions.


Breast cancer DNA integrity index Real time PCR 


Compliance with ethical standards

Conflict of interest


Source of funding


Supplementary material

13277_2015_4624_Fig3_ESM.jpg (85 kb)
Fig. S1

Real Time PCR amplification for 400 bp β-actin gene of breast cancer patients: Each line presents one patient, the lower the CT, the higher the plasma DNA concentration (JPG 85 kb)


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Copyright information

© International Society of Oncology and BioMarkers (ISOBM) 2015

Authors and Affiliations

  1. 1.Department of Clinical Pathology, National Cancer InstituteCairo UniversityCairoEgypt
  2. 2.Medical Research Center, Molecular Biology Unit, Faculty of MedicineAin Shams UniversityCairoEgypt
  3. 3.Department of Pathology, Tissue culture & Cytogenetic unit, National Cancer InstituteCairo UniversityCairoEgypt

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