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Ann Diagn Pathol ; 39: 53-58, 2019 Apr.
Article in English | MEDLINE | ID: mdl-30718223

ABSTRACT

The transmembrane receptor NOTCH1 is thought to be associated with the development and progression of T-acute lymphoblastic leukemia (T-ALL)/T-lymphoblastic lymphoma (T-LBL) and chronic lymphocytic leukemia (CLL)/small lymphocytic lymphoma (SLL). The current study aimed to characterize NOTCH1 expression and elucidate the variants in the functional PEST domain of the receptor in T-ALL/LBL and CLL/SLL. The nuclear expression of NOTCH1 protein was detected in 25% and 5% of cases of T-ALL/LBL and CLL/SLL, respectively, whereas cytoplasmic expression was detected in 33.3% and 15% cases, respectively. The frequency of variants in T-ALL/LBL was 33%, whereas 40% of CLL/SLL cases possessed variants. Four novel variants were identified; three of which were non-synonymous and one common variant c.7280_7280delG between T-ALL/LBL and CLL/SLL cases. The previously described variant, c.7541_7542delCT, was detected in 3 cases of CLL/SLL. These results provide support for the contribution of NOTCH1 in the etiology of these types of cancers.


Subject(s)
Genetic Variation , Leukemia, Lymphocytic, Chronic, B-Cell/genetics , Precursor T-Cell Lymphoblastic Leukemia-Lymphoma/genetics , Receptor, Notch1/genetics , Receptor, Notch1/metabolism , Cell Nucleus/metabolism , Cytoplasm/metabolism , Female , Genetic Predisposition to Disease , Humans , Jordan , Male , Protein Domains , Receptor, Notch1/chemistry
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