Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: UNIPROT:Q06643 (non-Hodgkin's lymphoma)
 11,307 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

During normal B-lymphocyte development once cells pass the pro-B stage the transcription factor LEF-1, a key component of the Wnt/beta-catenin pathway, is down regulated. However studies have shown that B-cell chronic lymphocytic leukaemia (CLL) lymphocytes, which have a mature B-cell phenotype, still express abundant LEF-1. This study demonstrates that although LEF-1 mRNA is universally, highly expressed in B-CLL, expression of this gene is much lower or absent in the majority of low-grade B-cell non-Hodgkin's lymphoma (NHL). This suggests that there exist key differences in the activity of the Wnt/beta-catenin pathway between low-grade B-cell malignancies.
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PMID:Variation of LEF-1 mRNA expression in low-grade B-cell non-Hodgkin's lymphoma. 1605 89

Human herpesvirus 8 (HHV-8)-associated primary effusion lymphoma is a rare non-Hodgkin's lymphoma often associated with Epstein-Barr virus (EBV) infection. Mutations in TP53, PTEN, PIK3CA, CTNNB1/beta-catenin genes and deletion of CDKN2A-ARF (p14(ARF)-p16(NK4a I) ) locus were investigated in sixteen primary primary effusion lymphoma tumors and seven primary effusion lymphoma cell lines using PCR and sequencing. TP53 mutations were detected in one primary primary effusion lymphoma tumor (6.2%) and two primary effusion lymphoma cell lines (28.6%). BC-3 and BCP-1 cell lines showed PTEN gene mutations, associated with a loss of PTEN protein expression in both cases. No mutations were detected in PIK3CA and CTNNB1/beta-catenin hotspot sequences. Only BC-3 contained a homozygous deletion of CDKN2A-ARF locus. Although detected at a higher frequency in primary effusion lymphoma cell lines than in primary primary effusion lymphoma tumors, TP53 and/or PTEN mutations, as well as deletion of CDKN2A-ARF locus are uncommon in primary effusion lymphoma, and are found to correlate with the EBV-negative status of primary effusion lymphoma tumors.
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PMID:Mutational analysis of TP53, PTEN, PIK3CA and CTNNB1/beta-catenin genes in human herpesvirus 8-associated primary effusion lymphoma. 1960 68