کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9365388 | 1271504 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Differential expression of cyclin D3 in ALK+ and ALKâ anaplastic large cell lymphoma
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موضوعات مرتبط
علوم پزشکی و سلامت
پزشکی و دندانپزشکی
آسیبشناسی و فناوری پزشکی
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چکیده انگلیسی
As defined in the World Health Organization classification, anaplastic large cell lymphoma (ALCL) is a distinct type of non-Hodgkin lymphoma of T/null cell lineage, a subset of which is associated with translocations involving 2p23 resulting in expression of anaplastic lymphoma kinase (ALK). The most common translocation, the t(2;5)(p23;q35), results in expression of nucleophosmin (NPM)-ALK. NPM-ALK has been shown to activate signal transducer and activator of transcription (STAT) 3, a transcriptional regulator of cyclin D3. In this study, we assessed cyclin D3 expression in 2 ALK+ ALCL cell lines (Karpas 299 and SU-DHL1) and 1 ALKâ ALCL cell line (Mac2A) by Western blot analysis. We also assessed cyclin D3 expression in 52 ALCL tumors (32 ALK+, 20 ALKâ) by immunohistochemistry using tissue microarrays. These results were compared with phosphorylated (activated) STAT3 (pSTAT3) expression. Both ALK+ ALCL cell lines, but not the ALKâ ALCL cell line, expressed cyclin D3 and pSTAT3. Cyclin D3 was expressed in 25 (78%) of 32 ALK+ ALCL tumors and in 4 (20%) of 20 ALKâ ALCL tumors (P < .001, Fisher exact test ). In ALK+ ALCL tumors, the mean percentage of cyclin D3-positive tumor cells was 40.6% compared with 5.1% in ALKâ ALCL tumors (P < .001, Mann-Whitney U test). The percentages of cyclin D3-positive and pSTAT3-positive tumor cells were positively correlated (Spearman R = 0.35, P = .036). We conclude that cyclin D3 is differentially expressed in ALK+ and ALKâ ALCL and that high expression levels of cyclin D3 in ALK+ ALCL may be attributable to STAT3 activation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Human Pathology - Volume 36, Issue 7, July 2005, Pages 806-811
Journal: Human Pathology - Volume 36, Issue 7, July 2005, Pages 806-811
نویسندگان
Rory R. MD, George Z. MD, PhD, Coralyn BS, Sarah Wang, Mauricio P. MD, L. Jeffrey MD,