TY - JOUR
T1 - CDKN1B/p27 expression in peripheral T cell lymphoma not otherwise specified
AU - Gazzola, Anna
AU - Sista, Maria Teresa
AU - Agostinelli, Claudio
AU - Righi, Simona
AU - Sapienza, Maria Rosaria
AU - Mannu, Claudia
AU - Rossi, Maura
AU - Bacci, Francesco
AU - Sabattini, Elena
AU - Went, Philip
AU - Zinzani, Pier Luigi
AU - Pileri, Stefano A.
AU - Piccaluga, Pier Paolo
PY - 2011/1
Y1 - 2011/1
N2 - Aims: Peripheral T cell lymphoma not otherwise specified (PTCL/NOS) is the commonest PTCL subtype. Recently, proliferation pathways have been found to be commonly altered in PTCL/NOS. CDKN1B/p27, a critical regulator of cell cycle and proliferation, has been suggested to be involved in T cell lymphomagenesis. This study aimed to evaluate the possible occurrence of CDKN1B/p27 aberrations in PTCL/NOS. Methods: CDKN1B/p27 expression at RNA and protein level by DNA and tissue microarrays, in 28 and 98 cases, respectively, was studied. Additionally, direct sequencing of CDKN1B in 81 PTCL/NOS was performed. Results: CDKN1B mRNA was similarly expressed in PTCL/NOS and normal T lymphocytes. In addition, structural abnormalities were not found; these included mutations and deletions in any exons, exon-intron junctions or regulatory regions. Furthermore, physiological expression of p27 in neoplastic cells was demonstrated by immunohistochemistry; this was mutually exclusive with Ki-67, as expected when the system is intact. Consistently, the expression of other molecules that are functionally related to CDKN1B/p27 in controlling cell cycle (including CCNE1) did not appear to be affected at either the mRNA or protein level. Finally, it was found that p27 expression was not significantly related with overall survival. Conclusion: CDKN1B/p27 aberrations seem to be uncommon in PTCL/NOS pathogenesis.
AB - Aims: Peripheral T cell lymphoma not otherwise specified (PTCL/NOS) is the commonest PTCL subtype. Recently, proliferation pathways have been found to be commonly altered in PTCL/NOS. CDKN1B/p27, a critical regulator of cell cycle and proliferation, has been suggested to be involved in T cell lymphomagenesis. This study aimed to evaluate the possible occurrence of CDKN1B/p27 aberrations in PTCL/NOS. Methods: CDKN1B/p27 expression at RNA and protein level by DNA and tissue microarrays, in 28 and 98 cases, respectively, was studied. Additionally, direct sequencing of CDKN1B in 81 PTCL/NOS was performed. Results: CDKN1B mRNA was similarly expressed in PTCL/NOS and normal T lymphocytes. In addition, structural abnormalities were not found; these included mutations and deletions in any exons, exon-intron junctions or regulatory regions. Furthermore, physiological expression of p27 in neoplastic cells was demonstrated by immunohistochemistry; this was mutually exclusive with Ki-67, as expected when the system is intact. Consistently, the expression of other molecules that are functionally related to CDKN1B/p27 in controlling cell cycle (including CCNE1) did not appear to be affected at either the mRNA or protein level. Finally, it was found that p27 expression was not significantly related with overall survival. Conclusion: CDKN1B/p27 aberrations seem to be uncommon in PTCL/NOS pathogenesis.
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U2 - 10.1136/jcp.2010.083832
DO - 10.1136/jcp.2010.083832
M3 - Article
C2 - 21045237
AN - SCOPUS:78650825060
VL - 64
SP - 83
EP - 87
JO - Journal of Clinical Pathology - Clinical Molecular Pathology
JF - Journal of Clinical Pathology - Clinical Molecular Pathology
SN - 0021-9746
IS - 1
ER -