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. 2020 Jul 8;12(7):1838. doi: 10.3390/cancers12071838

Table 1.

MicroRNAs that affect DNA damage response and homologous recombination repair downregulated after irradiation.

miRNAs Target Proteins Studied Material
and IR Dose
Predicted Consequences for Cells References
miR-155,
miR-375
RAD51 p53 Thirty-two male FVB/NJ mice, 12 weeks old/liver tissue
Dose: 28 mGy
- [116,132,133]
miR-34a c-Myc Human colorectal cancer cells HCT116 p53-/-
Doses: 2; 4; 8 Gy
MiR-34a is a critical mediator of p53 function. [134,135]
c-Myc Human non-small-cell lung carcinoma (NSCLC) H460
Doses: 1; 2; 5 Gy
Senescence-promoting effect.
miR-24,
miR-103 & miR-107,
miR-106a,
miR-155
H2AX, RAD51
ATM RAD51
Human B lymphoblastic cell line IM9
Dose:1 Gy
MiR-34a may be involved in the cell
cycle response and apoptosis pathway in association with p53.
[26,64,108,133,136]
miR-24,
miR-26b,
miR-125b,
miR-100
H2AX
ATM
p53
ATM
Normal human fibroblasts AG01522
Dose: 10 Gy
Regulation of cellular response following irradiation. [64,104,106,137,138]
miR-203 ATM Normal thyroid cells
Doses: 1; 10 Gy
MiR-203 dysregulation is associated with radiation exposure and may be unique for thyroid cells. [139,140]
miR-504 p53 Human head and
neck epithelial malignancy, nasopharyngeal carcinoma (NPC),
radio-resistant cell lines CNE2-IR and HK1-IR
Doses: 2; 4; 6 Gy
Induction of radioresistance by down-regulating the expression of NRF1 and disturbing mitochondrial respiratory function. [117,141]