Rel-A/PACER/miR 7 Axis May Play a Role in  Radiotherapy Treatment in Breast Cancer Patients

shokri, fazlollah; Mozdarani, Hossein; Omrani, Mir Davood

doi:10.61186/ibj.3901

Volume 27, Issue 4 (7-2023) IBJ 2023, 27(4): 173-182 | Back to browse issues page

‎ 10.61186/ibj.3901

‎ 20.1001.1.1028852.2023.27.4.3.7

PMID: 37507347

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shokri F, Mozdarani H, Omrani M D. Rel-A/PACER/miR 7 Axis May Play a Role in Radiotherapy Treatment in Breast Cancer Patients. IBJ 2023; 27 (4) :173-182
URL: http://ibj.pasteur.ac.ir/article-1-3901-en.html

Rel-A/PACER/miR 7 Axis May Play a Role in Radiotherapy Treatment in Breast Cancer Patients

Fazlollah Shokri

, Hossein Mozdarani ^*

, Mir Davood Omrani

Abstract:

Background: Radiotherapy has become the standard form of treatment for breast cancer (BC). Radioresistance is an issue that limits the effectiveness of radiotherapy (RT). Therefore, predictive biomarkers are needed to choose the appropriate RT for the patient. Activation of the proinflammatory transcription factor, nuclear factor-kappa B (NF-κB), is a frequently noted pathway in BC. Investigating the relationship between RT and alterations in gene expression involved in the immune pathway can help better control the disease. This research investigated the impact of RT on the expression levels of Rel-A, PACER, and miR-7 within the NF-κB signaling pathway.
Methods: Blood samples (n = 15) were obtained from BC patients during four different time intervals: 72 hours prior to initiating RT, as well as one, two, and four weeks following RT completion. Samples were also collected from 20 healthy women who had no immune or cancer-related diseases. Blood RNA was extracted, and complementary DNA was synthesized. Gene expression level was determined using R real-time polymerase chain reaction (RT-PCR).
Results: There was a significant difference in the expression level of Rel-A between patients and normal individual blood samples (p < 0.05). After four weeks of RT, qRT-PCR revealed a significant downregulation of miR-7 and upregulation of Rel-A and PACER in BC patients. Also, there was a significant association between Rel-A expression and monocyte numbers during RT
(p < 0.001).
Conclusion: The expression level of PACER, miR-7 and Rel-A, changed after RT; therefore, these genes could be used as diagnostic and therapeutic RT markers in BC.

Keywords: Biomarkers, Breast cancer, Radiotherapy

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Type of Study: Full Length/Original Article | Subject: Molecular Genetics & Genomics

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