Novel cell culture technique for primary ductal carcinoma in situ: role of Notch and epidermal growth factor receptor signaling pathways.

2.50
Hdl Handle:
http://hdl.handle.net/10541/70033
Title:
Novel cell culture technique for primary ductal carcinoma in situ: role of Notch and epidermal growth factor receptor signaling pathways.
Authors:
Farnie, Gillian; Clarke, Robert B; Spence, Katherine; Pinnock, Natasha; Brennan, Keith; Anderson, Neil G; Bundred, Nigel J
Abstract:
BACKGROUND: The epidermal growth factor receptor (EGFR) and Notch signaling pathways have been implicated in self-renewal of normal breast stem cells. We investigated the involvement of these signaling pathways in ductal carcinoma in situ (DCIS) of the breast. METHODS: Samples of normal breast tissue (n = 15), pure DCIS tissue of varying grades (n = 35), and DCIS tissue surrounding an invasive cancer (n = 7) were used for nonadherent (i.e., mammosphere) culture. Mammosphere cultures were treated at day 0 with gefitinib (an EGFR inhibitor), DAPT (N-[N-(3,5-difluorophenacetyl-L-alanyl)]-S-phenylglycine t-butyl ester) (a gamma-secretase inhibitor), or Notch 4-neutralizing antibody. Mammosphere-forming efficiency (MFE) was calculated by dividing the number of mammospheres of 60 microm or more formed by the number of single cells seeded and is expressed as a percentage. The Notch 1 intracellular domain (NICD) was detected immunohistochemically in paraffin-embedded DCIS tissue from 50 patients with at least 60 months of follow-up. All statistical tests were two-sided. RESULTS: DCIS had a greater MFE than normal breast tissue (1.5% versus 0.5%, difference = 1%, 95% confidence interval [CI] = 0.62% to 1.25%, P<.001). High-grade DCIS had a greater MFE than low-grade DCIS (1.6% versus 1.09%, difference = 0.51%, 95% CI = 0.07% to 0.94%, P = .01). The MFE of high-grade DCIS treated with gefitinib in the absence of exogenous EGF was lower than that of high-grade DCIS treated with mammosphere medium lacking gefitinib and exogenous EGF (0.56% versus 1.36%, difference 0.8%, 95% CI = 0.33% to 1.4%, P = .004). Increased Notch signaling as detected by NICD staining was associated with recurrence at 5 years (P = .012). DCIS MFE was reduced when Notch signaling was inhibited using either DAPT (0.89% versus 0.51%, difference = 0.38%, 95% CI = 0.2% to 0.6%, P<.001) or a Notch 4-neutralizing antibody (0.97% versus 0.2%, difference = 0.77%, 95% CI = 0.52% to 1.0%, P<.001). CONCLUSION: We describe a novel primary culture technique for DCIS. Inhibition of the EGFR or Notch signaling pathways reduced DCIS MFE.
Affiliation:
Department of Surgery and Breast Biology Group, Division of Cancer Studies, Faculty of Medicine and Human Sciences, University of Manchester, Christie Hospital NHS Trust, Wilmslow Road, M20 9BX, Manchester, UK.
Citation:
Novel cell culture technique for primary ductal carcinoma in situ: role of Notch and epidermal growth factor receptor signaling pathways. 2007, 99 (8):616-27 J. Natl. Cancer Inst.
Journal:
Journal of the National Cancer Institute
Issue Date:
18-Apr-2007
URI:
http://hdl.handle.net/10541/70033
DOI:
10.1093/jnci/djk133
PubMed ID:
17440163
Type:
Article
Language:
en
ISSN:
1460-2105
Appears in Collections:
All Christie Publications ; All Paterson Institute for Cancer Research

Full metadata record

DC FieldValue Language
dc.contributor.authorFarnie, Gillian-
dc.contributor.authorClarke, Robert B-
dc.contributor.authorSpence, Katherine-
dc.contributor.authorPinnock, Natasha-
dc.contributor.authorBrennan, Keith-
dc.contributor.authorAnderson, Neil G-
dc.contributor.authorBundred, Nigel J-
dc.date.accessioned2009-06-09T16:18:55Z-
dc.date.available2009-06-09T16:18:55Z-
dc.date.issued2007-04-18-
dc.identifier.citationNovel cell culture technique for primary ductal carcinoma in situ: role of Notch and epidermal growth factor receptor signaling pathways. 2007, 99 (8):616-27 J. Natl. Cancer Inst.en
dc.identifier.issn1460-2105-
dc.identifier.pmid17440163-
dc.identifier.doi10.1093/jnci/djk133-
dc.identifier.urihttp://hdl.handle.net/10541/70033-
dc.description.abstractBACKGROUND: The epidermal growth factor receptor (EGFR) and Notch signaling pathways have been implicated in self-renewal of normal breast stem cells. We investigated the involvement of these signaling pathways in ductal carcinoma in situ (DCIS) of the breast. METHODS: Samples of normal breast tissue (n = 15), pure DCIS tissue of varying grades (n = 35), and DCIS tissue surrounding an invasive cancer (n = 7) were used for nonadherent (i.e., mammosphere) culture. Mammosphere cultures were treated at day 0 with gefitinib (an EGFR inhibitor), DAPT (N-[N-(3,5-difluorophenacetyl-L-alanyl)]-S-phenylglycine t-butyl ester) (a gamma-secretase inhibitor), or Notch 4-neutralizing antibody. Mammosphere-forming efficiency (MFE) was calculated by dividing the number of mammospheres of 60 microm or more formed by the number of single cells seeded and is expressed as a percentage. The Notch 1 intracellular domain (NICD) was detected immunohistochemically in paraffin-embedded DCIS tissue from 50 patients with at least 60 months of follow-up. All statistical tests were two-sided. RESULTS: DCIS had a greater MFE than normal breast tissue (1.5% versus 0.5%, difference = 1%, 95% confidence interval [CI] = 0.62% to 1.25%, P<.001). High-grade DCIS had a greater MFE than low-grade DCIS (1.6% versus 1.09%, difference = 0.51%, 95% CI = 0.07% to 0.94%, P = .01). The MFE of high-grade DCIS treated with gefitinib in the absence of exogenous EGF was lower than that of high-grade DCIS treated with mammosphere medium lacking gefitinib and exogenous EGF (0.56% versus 1.36%, difference 0.8%, 95% CI = 0.33% to 1.4%, P = .004). Increased Notch signaling as detected by NICD staining was associated with recurrence at 5 years (P = .012). DCIS MFE was reduced when Notch signaling was inhibited using either DAPT (0.89% versus 0.51%, difference = 0.38%, 95% CI = 0.2% to 0.6%, P<.001) or a Notch 4-neutralizing antibody (0.97% versus 0.2%, difference = 0.77%, 95% CI = 0.52% to 1.0%, P<.001). CONCLUSION: We describe a novel primary culture technique for DCIS. Inhibition of the EGFR or Notch signaling pathways reduced DCIS MFE.en
dc.language.isoenen
dc.subjectBreast Canceren
dc.subject.meshBreast-
dc.subject.meshBreast Neoplasms-
dc.subject.meshCarcinoma in Situ-
dc.subject.meshCarcinoma, Intraductal, Noninfiltrating-
dc.subject.meshCell Adhesion-
dc.subject.meshCell Culture Techniques-
dc.subject.meshFemale-
dc.subject.meshHumans-
dc.subject.meshNeoplasm Invasiveness-
dc.subject.meshReceptor, Epidermal Growth Factor-
dc.subject.meshReceptors, Notch-
dc.subject.meshRecurrence-
dc.subject.meshTumor Cells, Cultured-
dc.titleNovel cell culture technique for primary ductal carcinoma in situ: role of Notch and epidermal growth factor receptor signaling pathways.en
dc.typeArticleen
dc.contributor.departmentDepartment of Surgery and Breast Biology Group, Division of Cancer Studies, Faculty of Medicine and Human Sciences, University of Manchester, Christie Hospital NHS Trust, Wilmslow Road, M20 9BX, Manchester, UK.en
dc.identifier.journalJournal of the National Cancer Instituteen
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