Curcumin suppresses human papillomavirus oncoproteins, restores p53, rb, and ptpn13 proteins and inhibits benzo[a]pyrene-induced upregulation of HPV E7

Diane M. Maher, Maria C. Bell, Emmylu A. O'Donnell, Brij K. Gupta, Meena Jaggi, Subhash Chauhan

Research output: Contribution to journalArticle

55 Citations (Scopus)

Abstract

Curcumin has great potential as a chemopreventive and chemotherapeutic agent; however, its effects on human papillomavirus (HPV)-associated molecular events are inadequately explored. This study examined the effects of curcumin on HPV-associated pathways involved in developing cervical cancer. We demonstrate for the first time that curcumin treatment suppresses cervical cancer cell growth in a three-dimensional raft culture system. Curcumin also inhibits tumorigenic characteristics as shown by decreases in both clonogenic potential and cell motility. Additionally, our findings show that curcumin treatment inhibits the transcription of HPV16 E6/E7 as early as 6 h posttreatment and restores the expression of tumor suppressor proteins p53, retinoblastoma protein, and PTPN13. While smoking is a recognized risk factor for cervical cancer, the molecular effects of smoke carcinogens on the expression of HPV E6/E7 oncogenes are not well known. We show for the first time that exposure to benzo[a]pyrene (BaP), a tobacco carcinogen, increases the expression of HPV E7 oncoprotein suggesting a molecular link between smoking and cervical cancer. Importantly, curcumin decreases the BaP induced increase in the expression of HPV E7 oncoprotein. The results of this study clearly demonstrate that curcumin alters HPV-associated molecular pathways in cervical cancer cells. These novel findings imply that curcumin may be an effective chemopreventive and therapeutic agent for cervical cancer prevention and treatment.

Original languageEnglish (US)
Pages (from-to)47-57
Number of pages11
JournalMolecular Carcinogenesis
Volume50
Issue number1
DOIs
StatePublished - Jan 1 2011
Externally publishedYes

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Tumor Suppressor Protein p53
Retinoblastoma Protein
Curcumin
Benzo(a)pyrene
Up-Regulation
Uterine Cervical Neoplasms
Oncogene Proteins
Carcinogens
Smoking
Oncogenes
Smoke
Tobacco
Cell Movement

All Science Journal Classification (ASJC) codes

  • Molecular Biology
  • Cancer Research

Cite this

Curcumin suppresses human papillomavirus oncoproteins, restores p53, rb, and ptpn13 proteins and inhibits benzo[a]pyrene-induced upregulation of HPV E7. / Maher, Diane M.; Bell, Maria C.; O'Donnell, Emmylu A.; Gupta, Brij K.; Jaggi, Meena; Chauhan, Subhash.

In: Molecular Carcinogenesis, Vol. 50, No. 1, 01.01.2011, p. 47-57.

Research output: Contribution to journalArticle

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