Abstract:
:Detection of a 17p13.1 deletion (loss of TP53) or 11q22.3 deletion (loss of ATM), by fluorescence in situ hybridization (FISH), in chronic lymphocytic leukaemia (CLL) patients is associated with a poorer prognosis. Because TP53 and ATM are integral to the TP53 pathway, we hypothesized that 17p13.1- (17p-) and 11q22.3- (11q-) occurring in the same cell (clonal 17p-/11q-) would confer a worse prognosis than either 17p- or 11q-. We studied 2184 CLL patients with FISH (1995-2012) for the first occurrence of 17p-, 11q-, or clonal 17p-/11q-. Twenty (1%) patients had clonal 17p-/11q-, 158 (7%) had 17p- (including 4 with 17p- and 11q- in separate clones), 247 (11%) had 11q-, and 1759 (81%) had neither 17p- nor 11q-. Eleven of 15 (73%) tested patients with clonal 17p-/11q- had dysfunctional TP53 mutations. Overall survival for clonal 17p-/11q- was significantly shorter (1·9 years) than 17p- (3·1 years, P = 0·04), 11q- (4·8 years, P ≤ 0·0001), or neither 17p- nor 11q- (9·3 years, P ≤ 0·0001). Clonal 17p-/11q- thus conferred significantly worse prognosis, suggesting that loss of at least one copy of both TP53 and ATM causes more aggressive disease. Use of an ATM/TP53 combination FISH probe set could identify these very-high risk patients.
journal_name
Br J Haematoljournal_title
British journal of haematologyauthors
Greipp PT,Smoley SA,Viswanatha DS,Frederick LS,Rabe KG,Sharma RG,Slager SL,Van Dyke DL,Shanafelt TD,Tschumper RC,Zent CSdoi
10.1111/bjh.12534subject
Has Abstractpub_date
2013-11-01 00:00:00pages
326-33issue
3eissn
0007-1048issn
1365-2141journal_volume
163pub_type
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