Resumo

LOPEZ-FACIO, Karina Liliana et al. Expression of BART-5, BART-16 and BART-22, and NF-κB factor in classic Hodgkin's lymphoma in pediatric patients. Bol. Med. Hosp. Infant. Mex. [online]. 2013, vol.70, n.2, pp.98-106. ISSN 1665-1146.

Background. Classic Hodgkin's lymphoma (CHL) is a neoplasm in which the presence of, or infection by, the Epstein-Barr virus (EBV) is associated with disease development. Two aspects of this condition are currently unknown: first, whether molecular regulators such as the microRNAs of EBV are expressed and second, if there is an association with inflammation-promoting, neoplastic factors in pediatric CHL. The aim of the present study was to use RT-PCR to analyze the expression of the specific microRNAs of EBV called BARTs, specifically BARTs-5, -16 and -22 and that of factor NF-κB, also using RT-PCR. Methods. A total of 24 cases were selected after meeting the inclusion criteria, which involved different varieties of CHL including the nodular sclerosis (NS) and mixed cellularity (MC) types. These resulted in being the most common ones, each with a frequency of 41.6%. Results. BART-5 was the one most frequently expressed in CHL, at 83.3%. BART-22 was the second most frequent, at 33.3%, compared to 0% in controls (reactive lymph nodes, RLN). In all cases, the differences compared to RLN were significant (p <0.05). Expression of NF-κB was found in 62.5% of CHL cases and was present in 83.3% of RLN (p <0.05). The MC type expressed it in 90% of cases, compared to only 20% for the NS variety (p <0.05). Conclusions. BART-5 was the one most frequently expressed in CHL cases. NF-κB factor is an important indicator of inflammation most often expressed in RLN.

Palavras-chave : Epstein-Barr virus; Hodgkin's lymphoma; microRNAs; BARTs; NF-κB.

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