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Breast Cancer Research and Treatment

, Volume 129, Issue 2, pp 331–345 | Cite as

Crosstalk between nicotine and estrogen-induced estrogen receptor activation induces α9-nicotinic acetylcholine receptor expression in human breast cancer cells

  • Chia-Hwa Lee
  • Ya-Chieh Chang
  • Ching-Shyang Chen
  • Shih-Hsin Tu
  • Ying-Jan Wang
  • Li-Ching Chen
  • Yu-Jia Chang
  • Po-Li Wei
  • Hui-Wen Chang
  • Chien-Hsi Chang
  • Ching-Shui Huang
  • Chih-Hsiung Wu
  • Yuan-Soon Ho
Preclinical study

Abstract

The primary aim of this study was to elucidate the role of the estrogen receptor (ER), a transcription factor involved in the nicotine- and 17β-estradiol (E2)-mediated up-regulation of α9-nAChR gene expression. A real-time polymerase chain reaction (PCR) assay was used to quantify the α9-nAChR mRNA expression levels of surgically isolated (n = 339) and laser-capture microdissected tissues (ER+ versus ER−, n = 6 per group). Chromatin immunoprecipitation (ChIP) and luciferase-promoter activity assays were used to investigate the ER-mediated transcriptional regulation of α9-nAChR gene expression. We observed that breast tumors with higher α9-nAChR mRNA expression levels (i.e., a mean fold ratio in the tumor/normal-paired samples of greater than tenfold) were associated with the lowest 5-year disease-specific survival rate (50%, dead/alive = 4/4, total = 8 patients, P = 0.006), in contrast to breast tumors with low levels (i.e., a mean fold ratio of less than onefold) of α9-nAChR expression (88%, dead/alive = 3/22, total = 25 patients). Furthermore, higher α9-nAChR mRNA expression levels were preferentially detected in ER+ tumor tissues in comparison to ER− tumor tissues (ER+ versus ER− patients: n = 160 vs. 72; mean fold ratios of α9-nAChR expression = 11 ± 3 vs. 6.7 ± 2.3 fold, respectively). In vitro promoter-binding assays demonstrated that the ER is a major transcription factor that mediates nicotine- and E2-induced up-regulation of α9-nAChR gene expression in MCF-7 cells. In conclusion, our data indicate that the ER plays a central role in mediating α9-nAChR gene up-regulation in response to either nicotine or E2 stimulation.

Keywords

Estrogen receptor Nicotine Estrogen Breast cancer AP1 

Abbreviations

ChIP

Chromatin immunoprecipitation

DMSO

Dimethyl sulfoxide

E2

Estrogen

ER

Estrogen receptor

GUS

β-Glucuronidase

LCM

Laser-capture microdissection

MTT

3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium

nAchR

Nicotinic receptor

NNK

4-(Methylnitrosamino)-1-(3-pyridyl)-1-butanone

PR

Progesterone receptor

Notes

Acknowledgments

This study was supported by the National Science Council [NSC 96-2628-B-038-003-MY3(1-3), NSC 98-2320-B-038-006-MY3(1-3)] and DOH99-TD-C-111-008 to Dr. Ho, and [NSC 97-2314-B-038-034-MY3(1-3)] to Dr. Wu, and by the Cathay Medical Center [96CGH-TMU-05 and 97CGH-TMU-02].

Supplementary material

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Copyright information

© Springer Science+Business Media, LLC. 2010

Authors and Affiliations

  • Chia-Hwa Lee
    • 1
  • Ya-Chieh Chang
    • 1
  • Ching-Shyang Chen
    • 2
  • Shih-Hsin Tu
    • 2
    • 3
  • Ying-Jan Wang
    • 4
  • Li-Ching Chen
    • 1
  • Yu-Jia Chang
    • 2
    • 5
    • 8
  • Po-Li Wei
    • 2
    • 8
  • Hui-Wen Chang
    • 6
  • Chien-Hsi Chang
    • 6
  • Ching-Shui Huang
    • 2
    • 3
  • Chih-Hsiung Wu
    • 7
  • Yuan-Soon Ho
    • 1
    • 6
    • 8
    • 9
  1. 1.Graduate Institute of Medical Sciences, College of MedicineTaipei Medical UniversityTaipeiTaiwan
  2. 2.Department of Surgery and Center of Quality Management and Breast Health Center, School of MedicineTaipei Medical University HospitalTaipeiTaiwan
  3. 3.Department of SurgeryCathay General HospitalTaipeiTaiwan
  4. 4.Department of Environmental and Occupational HealthNational Cheng Kung University Medical CollegeTainanTaiwan
  5. 5.Graduate Institute of Clinical MedicineCollege of Medicine, Taipei Medical UniversityTaipeiTaiwan
  6. 6.Department of Laboratory MedicineTaipei Medical University HospitalTaipeiTaiwan
  7. 7.Department of Surgery, School of MedicineTaipei Medical University-Shuang Ho HospitalJhonghe CityTaiwan
  8. 8.Center of Excellence for Cancer ResearchTaipei Medical UniversityTaipeiTaiwan
  9. 9.Graduate Institute of Biomedical TechnologyTaipei Medical UniversityTaipeiTaiwan

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