Abstract:
AIMS:Nuclear factor-kappa B (NF-kappaB) activation has been recognised as an important mechanism in the development of cancers. However, expression status of NF-kappaB-related proteins in oesophageal squamous cell carcinoma (ESCC) tissues is largely unknown. In this study, we analysed expressions of NF-kappaB members (p50/105, p52/p100 and RelA) and IKKepsilon in ESCC tissues. METHODS:We analysed the expression of p50/105, p52/p100, RelA and IKKepsilon in 58 ESCC patients' tissues by immunohistochemistry using a tissue microarray (TMA) method. RESULTS:Normal oesophageal squamous cells expressed p50/105, p52/p100 and RelA in 5%, 79% and 10% of the tissues in cytoplasm, respectively; however, only p52/p100 was expressed in the nuclei (12%). The cancer tissues expressed p50/105, p52/p100 and RelA in 93%, 95% and 95% in cytoplasm and/or nuclei, respectively. Nuclear immunostainings of NF-kappaB members p50/105, p52/p100 and RelA, which are considered activation of NF-kappaB signalling, were observed in 34%, 60% and 26% of the cancers, respectively. IKKepsilon is expressed in cytoplasm in 50% of the normal squamous tissues and 84% of the cancer tissues. However, none of the expression of p50/105, p52/p100, RelA or IKKepsilon was associated with pathological characteristics, including differentiation, depth of invasion and TNM stage. CONCLUSION:The increased nuclear expressions of p50/105, p52/p100 and RelA as well as increased cytoplasmic expression of IKKepsilon in the ESCC tissues compared to the normal squamous cells suggested that over-expression of these proteins may be related to activation of the NF-kappaB pathway and might play a role in the development of ESCC.
journal_name
Pathologyjournal_title
Pathologyauthors
Kang MR,Kim MS,Kim SS,Ahn CH,Yoo NJ,Lee SHdoi
10.3109/00313020903257756subject
Has Abstractpub_date
2009-01-01 00:00:00pages
622-5issue
7eissn
0031-3025issn
1465-3931pii
S0031-3025(16)31918-3journal_volume
41pub_type
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