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Finn SP, Smyth P, Cahill S, Streck C, O’Regan EM, Flavin R, Sherlock J, Howells D, Henfrey R, Cullen M, Toner M, Timon C, O’Leary JJ, Sheils OM. Expression microarray analysis of papillary thyroid carcinoma and benign thyroid tissue: emphasis on the follicular variant and potential markers of malignancy. Virchows Arch 2007; 450:249-60. [PMID: 17252232 PMCID: PMC1888716 DOI: 10.1007/s00428-006-0348-5] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2006] [Accepted: 11/02/2006] [Indexed: 02/07/2023]
Abstract
The most common sub-variant of papillary thyroid carcinoma (PTC) is the so-called follicular variant (FVPTC), which is a particularly problematic lesion and can be challenging from a diagnostic viewpoint even in resected lesions. Although fine needle aspiration cytology is very useful in the diagnosis of PTC, its accuracy and utility would be greatly facilitated by the development of specific markers for PTC and its common variants. We used the recently developed Applied Biosystems 1700 microarray system to interrogate a series of 11 benign thyroid lesions and conditions and 14 samples of PTC (six with classic morphology and eight with follicular variant morphology). TaqMan(R) reverse transcriptase-polymerase chain reaction was used to validate the expression portfolios of 50 selected transcripts. Our data corroborates potential biomarkers previously identified in the literature, such as LGALS3, S100A11, LYN, BAX, and cluster of differentiation 44 (CD44). However, we have also identified numerous transcripts never previously implicated in thyroid carcinogenesis, and many of which are not represented on other microarray platforms. Diminished expression of metallothioneins featured strongly among these and suggests a possible role for this family as tumour suppressors in PTC. Fifteen transcripts were significantly associated with FVPTC morphology. Surprisingly, these genes were associated with an extremely narrow repertoire of functions, including the major histocompatibility complex and cathepsin families.
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Affiliation(s)
- S. P. Finn
- Department of Histopathology, University of Dublin, Trinity College, Dublin, Ireland
| | - P. Smyth
- Department of Histopathology, University of Dublin, Trinity College, Dublin, Ireland
| | - S. Cahill
- Department of Histopathology, University of Dublin, Trinity College, Dublin, Ireland
| | - C. Streck
- Applied Biosystems, Foster City, CA USA
| | | | - R. Flavin
- Department of Histopathology, University of Dublin, Trinity College, Dublin, Ireland
| | | | | | | | - M. Cullen
- Department of Endocrinology, St James’s Hospital, Dublin, Ireland
| | - M. Toner
- Dublin Dental School and Hospital, Dublin, Ireland
| | - C. Timon
- Department of Otolaryngology, St. James’s Hospital, Dublin, Ireland
| | - J. J. O’Leary
- Department of Histopathology, University of Dublin, Trinity College, Dublin, Ireland
| | - O. M. Sheils
- Department of Histopathology, University of Dublin, Trinity College, Dublin, Ireland
- Department of Histopathology, Institute of Molecular Medicine, Trinity Centre for Health Sciences, St. James’s Hospital, Dublin 8, Ireland
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