ORAI1-mediated calcium influx in lactation and in breast cancer

Damara McAndrew, Desma M. Grice, Amelia A. Peters, Felicity M. Davis, Teneale Stewart, Michelle Rice, Chanel E. Smart, Melissa A. Brown, Paraic A. Kenny, Sarah J. Roberts-Thomson, Gregory R. Monteith

Research output: Contribution to journalArticle

106 Citations (Scopus)

Abstract

The entry of calcium into the mammary epithelial cell from the maternal plasma (i.e., calcium influx mechanisms) during lactation is poorly understood. As alterations in calcium channels and pumps are a key feature of some cancers, including breast cancer, understanding these calcium influx pathways may have significance beyond mammary biology. We show that the store-operated calcium influx protein, Orai1, is increased during lactation whereas the Orai1 activator Stim1, but not Stim2, is downregulated. Stim2 siRNA reduced basal calcium levels in a lactation model. Our results suggest that calcium influx is remodeled in mammary epithelial cells during lactation, with calcium influx increased through Orai1, activated by Stim2. Breast cancer cell lines had increased levels of ORAI1. ORAI1 siRNA in breast cancer cells reduced store-operated calcium entry and remodeled the calcium influx associated with invasive stimuli. Analysis of microarray data from 295 breast cancers showed that the transcriptional breast cancer subtype with the poorest prognosis (basal) was associated with an altered relationship between the ORAI1 regulators STIM1 and STIM2, and that women with breast cancers with STIM1 high/STIM2low tumors had a significantly poorer prognosis. Our studies show that during lactation there is a remodeling in the nature of calcium influx and that alteration in the ORAI1 influx pathway may be a feature of some breast cancers, particularly those with the poorest prognosis. Our studies suggest that this pathway may be a novel therapeutic target for breast cancer treatment in these women.

Original languageEnglish (US)
Pages (from-to)448-460
Number of pages13
JournalMolecular Cancer Therapeutics
Volume10
Issue number3
DOIs
StatePublished - Mar 2011

Fingerprint

Lactation
Breast Neoplasms
Calcium
Breast
Small Interfering RNA
Epithelial Cells
Calcium Channels
Microarray Analysis
Down-Regulation
Mothers
Cell Line
Therapeutics

ASJC Scopus subject areas

  • Oncology
  • Cancer Research

Cite this

McAndrew, D., Grice, D. M., Peters, A. A., Davis, F. M., Stewart, T., Rice, M., ... Monteith, G. R. (2011). ORAI1-mediated calcium influx in lactation and in breast cancer. Molecular Cancer Therapeutics, 10(3), 448-460. https://doi.org/10.1158/1535-7163.MCT-10-0923

ORAI1-mediated calcium influx in lactation and in breast cancer. / McAndrew, Damara; Grice, Desma M.; Peters, Amelia A.; Davis, Felicity M.; Stewart, Teneale; Rice, Michelle; Smart, Chanel E.; Brown, Melissa A.; Kenny, Paraic A.; Roberts-Thomson, Sarah J.; Monteith, Gregory R.

In: Molecular Cancer Therapeutics, Vol. 10, No. 3, 03.2011, p. 448-460.

Research output: Contribution to journalArticle

McAndrew, D, Grice, DM, Peters, AA, Davis, FM, Stewart, T, Rice, M, Smart, CE, Brown, MA, Kenny, PA, Roberts-Thomson, SJ & Monteith, GR 2011, 'ORAI1-mediated calcium influx in lactation and in breast cancer', Molecular Cancer Therapeutics, vol. 10, no. 3, pp. 448-460. https://doi.org/10.1158/1535-7163.MCT-10-0923
McAndrew D, Grice DM, Peters AA, Davis FM, Stewart T, Rice M et al. ORAI1-mediated calcium influx in lactation and in breast cancer. Molecular Cancer Therapeutics. 2011 Mar;10(3):448-460. https://doi.org/10.1158/1535-7163.MCT-10-0923
McAndrew, Damara ; Grice, Desma M. ; Peters, Amelia A. ; Davis, Felicity M. ; Stewart, Teneale ; Rice, Michelle ; Smart, Chanel E. ; Brown, Melissa A. ; Kenny, Paraic A. ; Roberts-Thomson, Sarah J. ; Monteith, Gregory R. / ORAI1-mediated calcium influx in lactation and in breast cancer. In: Molecular Cancer Therapeutics. 2011 ; Vol. 10, No. 3. pp. 448-460.
@article{8dd8cbe029d041ffbdaf357fd60c5715,
title = "ORAI1-mediated calcium influx in lactation and in breast cancer",
abstract = "The entry of calcium into the mammary epithelial cell from the maternal plasma (i.e., calcium influx mechanisms) during lactation is poorly understood. As alterations in calcium channels and pumps are a key feature of some cancers, including breast cancer, understanding these calcium influx pathways may have significance beyond mammary biology. We show that the store-operated calcium influx protein, Orai1, is increased during lactation whereas the Orai1 activator Stim1, but not Stim2, is downregulated. Stim2 siRNA reduced basal calcium levels in a lactation model. Our results suggest that calcium influx is remodeled in mammary epithelial cells during lactation, with calcium influx increased through Orai1, activated by Stim2. Breast cancer cell lines had increased levels of ORAI1. ORAI1 siRNA in breast cancer cells reduced store-operated calcium entry and remodeled the calcium influx associated with invasive stimuli. Analysis of microarray data from 295 breast cancers showed that the transcriptional breast cancer subtype with the poorest prognosis (basal) was associated with an altered relationship between the ORAI1 regulators STIM1 and STIM2, and that women with breast cancers with STIM1 high/STIM2low tumors had a significantly poorer prognosis. Our studies show that during lactation there is a remodeling in the nature of calcium influx and that alteration in the ORAI1 influx pathway may be a feature of some breast cancers, particularly those with the poorest prognosis. Our studies suggest that this pathway may be a novel therapeutic target for breast cancer treatment in these women.",
author = "Damara McAndrew and Grice, {Desma M.} and Peters, {Amelia A.} and Davis, {Felicity M.} and Teneale Stewart and Michelle Rice and Smart, {Chanel E.} and Brown, {Melissa A.} and Kenny, {Paraic A.} and Roberts-Thomson, {Sarah J.} and Monteith, {Gregory R.}",
year = "2011",
month = "3",
doi = "10.1158/1535-7163.MCT-10-0923",
language = "English (US)",
volume = "10",
pages = "448--460",
journal = "Molecular Cancer Therapeutics",
issn = "1535-7163",
publisher = "American Association for Cancer Research Inc.",
number = "3",

}

TY - JOUR

T1 - ORAI1-mediated calcium influx in lactation and in breast cancer

AU - McAndrew, Damara

AU - Grice, Desma M.

AU - Peters, Amelia A.

AU - Davis, Felicity M.

AU - Stewart, Teneale

AU - Rice, Michelle

AU - Smart, Chanel E.

AU - Brown, Melissa A.

AU - Kenny, Paraic A.

AU - Roberts-Thomson, Sarah J.

AU - Monteith, Gregory R.

PY - 2011/3

Y1 - 2011/3

N2 - The entry of calcium into the mammary epithelial cell from the maternal plasma (i.e., calcium influx mechanisms) during lactation is poorly understood. As alterations in calcium channels and pumps are a key feature of some cancers, including breast cancer, understanding these calcium influx pathways may have significance beyond mammary biology. We show that the store-operated calcium influx protein, Orai1, is increased during lactation whereas the Orai1 activator Stim1, but not Stim2, is downregulated. Stim2 siRNA reduced basal calcium levels in a lactation model. Our results suggest that calcium influx is remodeled in mammary epithelial cells during lactation, with calcium influx increased through Orai1, activated by Stim2. Breast cancer cell lines had increased levels of ORAI1. ORAI1 siRNA in breast cancer cells reduced store-operated calcium entry and remodeled the calcium influx associated with invasive stimuli. Analysis of microarray data from 295 breast cancers showed that the transcriptional breast cancer subtype with the poorest prognosis (basal) was associated with an altered relationship between the ORAI1 regulators STIM1 and STIM2, and that women with breast cancers with STIM1 high/STIM2low tumors had a significantly poorer prognosis. Our studies show that during lactation there is a remodeling in the nature of calcium influx and that alteration in the ORAI1 influx pathway may be a feature of some breast cancers, particularly those with the poorest prognosis. Our studies suggest that this pathway may be a novel therapeutic target for breast cancer treatment in these women.

AB - The entry of calcium into the mammary epithelial cell from the maternal plasma (i.e., calcium influx mechanisms) during lactation is poorly understood. As alterations in calcium channels and pumps are a key feature of some cancers, including breast cancer, understanding these calcium influx pathways may have significance beyond mammary biology. We show that the store-operated calcium influx protein, Orai1, is increased during lactation whereas the Orai1 activator Stim1, but not Stim2, is downregulated. Stim2 siRNA reduced basal calcium levels in a lactation model. Our results suggest that calcium influx is remodeled in mammary epithelial cells during lactation, with calcium influx increased through Orai1, activated by Stim2. Breast cancer cell lines had increased levels of ORAI1. ORAI1 siRNA in breast cancer cells reduced store-operated calcium entry and remodeled the calcium influx associated with invasive stimuli. Analysis of microarray data from 295 breast cancers showed that the transcriptional breast cancer subtype with the poorest prognosis (basal) was associated with an altered relationship between the ORAI1 regulators STIM1 and STIM2, and that women with breast cancers with STIM1 high/STIM2low tumors had a significantly poorer prognosis. Our studies show that during lactation there is a remodeling in the nature of calcium influx and that alteration in the ORAI1 influx pathway may be a feature of some breast cancers, particularly those with the poorest prognosis. Our studies suggest that this pathway may be a novel therapeutic target for breast cancer treatment in these women.

UR - http://www.scopus.com/inward/record.url?scp=79955757949&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79955757949&partnerID=8YFLogxK

U2 - 10.1158/1535-7163.MCT-10-0923

DO - 10.1158/1535-7163.MCT-10-0923

M3 - Article

VL - 10

SP - 448

EP - 460

JO - Molecular Cancer Therapeutics

JF - Molecular Cancer Therapeutics

SN - 1535-7163

IS - 3

ER -