Biochemistry (Moscow)

, Volume 77, Issue 8, pp 934–940 | Cite as

HDAC1/DNMT3A-containing complex is associated with suppression of Oct4 in cervical cancer cells

  • Dongbo Liu
  • Peng Zhou
  • Li Zhang
  • Wei Gong
  • Gang Huang
  • Yingru ZhengEmail author
  • Fengtian HeEmail author


Octamer-binding transcription factor 4 (Oct4), an important embryonic transcriptional factor, is highly expressed in several tumors and is considered as a hallmark of cancer stem cells. Knowledge about the expression and regulatory mechanisms of Oct4 can contribute to the treatment of cancers. As for cervical cancer, however, details remain obscure about Oct4 expression and its regulatory mechanism. In this study, we found that the level of Oct4 in human papillomavirus 16 (HPV16)-positive cervical cancer cells (CaSki cells) was higher than that in HPV-negative cervical cancer cells (C-33A cells), whereas both the level of histone deacetylase 1 (HDAC1) and DNA methyltransferase 3A (DNMT3A) were lower in CaSki cells than those in C-33A cells. Treatment with valproic acid, an HDAC inhibitor, could significantly increase the expression of Oct4 in C-33A cells, but only slightly increased Oct4 in CaSki cells. Co-immunoprecipitation assays showed that HDAC1 and DNMT3A existed in a common complex. The co-immunoprecipitated DNMT3A or HDAC1 was dose-dependently decreased with valproic acid treatment. These results indicated that HDAC1/DNMT3A-containing complex is associated with the suppression of Oct4 in cervical cancer cells, and the activity of HDAC1 is required in the repression of Oct4.

Key words

Oct4 cervical cancer HDAC1 DNMT3A HPV16 



cancer stem cells




Dulbecco’s modified Eagle’s media


DNA methyltransferase


glyceraldehyde-3-phosphate dehydrogenase


histone deacetylase


4-(2-hydroxyethyl)-1-piperazineethanesulfonic acid


human papillomavirus




Octamer-binding transcription factor 4


quantitative real time polymerase chain reaction


semiquantitative reverse transcriptional polymerase chain reaction


valproic acid


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Copyright information

© Pleiades Publishing, Ltd. 2012

Authors and Affiliations

  1. 1.Department of Biochemistry and Molecular BiologyThird Military Medical UniversityChongqingChina
  2. 2.Depeartment 1 of State Key Laboratory of Trauma, Burns, and Combined InjuryDaping Hospital and Institute of Surgery ResearchChongqingChina
  3. 3.Department of Obstetrics and GynecologyDaping Hospital and Institute of Surgery ResearchChongqingChina

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