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Helicase-like transcription factor confers radiation resistance in cervical cancer through enhancing the DNA damage repair capacity

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Abstract

Helicase-like transcription factor (HLTF) is a member of the SWI/SNF (mating type switching/sucrose non-fermenting) family of ATPases/helicases and also has a RING-finger motif characteristic of ubiquitin ligase proteins. These features have led to suggestions that HLTF functions like yeast Rad5, which promotes replication through DNA lesions via a post-replication repair pathway. However, the function of HLTF in higher eukaryotes is still unknown. Herein, we found the overexpression of HLTF in radiation recurrent human uterine cervical carcinoma tissues when compared to disease free survived patients tissues. In this study, we used RNA interference techniques to investigate the potential function of HLTF in cervical cancer cell line HeLa and found that the cell proliferation was reduced by knockdown (KD) of HLTF. A host-cell reactivation assay showed that the capacity for repair to DNA damage induced by X-ray irradiation was reduced in HLTF KD cells. X-rays also increased apoptosis in HLTF KD cells. These results suggest that HLTF is involved in DNA repair and apoptosis in cancer cells, which might represent a target for gene therapies of human cancer.

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Acknowledgments

This research was supported by the program of Basic Atomic Energy Research Institute (BAERI), which is a part of the Nuclear R & D Programs funded by the Ministry of Science and Technology (MOST) of Korea in 2008.

Conflict of interest

We declare that we have no conflict of interest.

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Authors and Affiliations

  1. Department of Radiation Oncology, Chungbuk National University College of Medicine, Cheongju, 361-763, Republic of Korea

    SungHwan Cho, Senthilkumar Cinghu & Woo-Yoon Park

  2. Department of Environmental and Tropical Medicine, Konkuk University College of Medicine, Chungju, 380-701, Republic of Korea

    Jae-Ran Yu

Authors
  1. SungHwan Cho
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  2. Senthilkumar Cinghu
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  3. Jae-Ran Yu
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  4. Woo-Yoon Park
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Corresponding author

Correspondence to Woo-Yoon Park.

Additional information

S. Cho and S. Cinghu have contributed equally to the work.

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Cho, S., Cinghu, S., Yu, JR. et al. Helicase-like transcription factor confers radiation resistance in cervical cancer through enhancing the DNA damage repair capacity. J Cancer Res Clin Oncol 137, 629–637 (2011). https://doi.org/10.1007/s00432-010-0925-5

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  • DOI: https://doi.org/10.1007/s00432-010-0925-5

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