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  • Muggerud, Aslaug Aamodt (author)

Molecular diversity in ductal carcinoma in situ (DCIS) and early invasive breast cancer

  • Article/chapterEnglish2010

Publisher, publication year, extent ...

  • 2010-06-26
  • Wiley,2010
  • printrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:uu-135202
  • https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-135202URI
  • https://doi.org/10.1016/j.molonc.2010.06.007DOI

Supplementary language notes

  • Language:English
  • Summary in:English

Part of subdatabase

Classification

  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • Ductal carcinoma in situ (DCIS) is a non-invasive form of breast cancer where cells restricted to the ducts exhibit an atypical phenotype. Some DCIS lesions are believed to rapidly transit to invasive ductal carcinomas (IDCs), while others remain unchanged. Existing classification systems for DCIS fail to identify those lesions that transit to IDC. We studied gene expression patterns of 31 pure DCIS, 36 pure invasive cancers and 42 cases of mixed diagnosis (invasive cancer with an in situ component) using Agilent Whole Human Genome Oligo Microarrays 44k. Six normal breast tissue samples were also included as controls. qRT-PCR was used for validation. All DCIS and invasive samples could be classified into the "intrinsic" molecular subtypes defined for invasive breast cancer. Hierarchical clustering establishes that samples group by intrinsic subtype, and not by diagnosis. We observed heterogeneity in the transcriptomes among DOS of high histological grade and identified a distinct subgroup containing seven of the 31 DCIS samples with gene expression characteristics more similar to advanced tumours. A set of genes independent of grade, ER-status and HER2-status was identified by logistic regression that univariately classified a sample as belonging to this distinct DCIS subgroup. qRT-PCR of single markers clearly separated this DCIS subgroup from the other DCIS, and contains samples from several histopathological and intrinsic molecular subtypes. The genes that differentiate between these two types of DCIS suggest several processes related to the re-organisation of the microenvironment. This raises interesting possibilities for identification of DCIS lesions both with and without invasive characteristics, which potentially could be used in clinical assessment of a woman's risk of progression, and lead to improved management that would avoid the current over- and under-treatment of patients.

Subject headings and genre

  • DCIS
  • Molecular subtypes of breast cancer
  • Progression
  • Gene expression
  • MEDICINE
  • MEDICIN

Added entries (persons, corporate bodies, meetings, titles ...)

  • Hallett, Michael (author)
  • Johnsen, Hilde (author)
  • Kleivi, Kristine (author)
  • Zhou, WenjingUppsala universitet,Endokrinkirurgi(Swepub:uu)wenzh820 (author)
  • Tahmasebpoor, SiminUppsala universitet,Institutionen för genetik och patologi (author)
  • Amini, Rose-MarieUppsala universitet,Institutionen för immunologi, genetik och patologi(Swepub:uu)roseamin (author)
  • Botling, JohanUppsala universitet,Institutionen för genetik och patologi(Swepub:uu)johanbot (author)
  • Borresen-Dale, Anne-Lise (author)
  • Sorlie, Therese (author)
  • Wärnberg, FredrikUppsala universitet,Endokrinkirurgi(Swepub:uu)fredwarn (author)
  • Uppsala universitetEndokrinkirurgi (creator_code:org_t)

Related titles

  • In:Molecular Oncology: Wiley4:4, s. 357-3681574-78911878-0261

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