Expression of beta 2-microglobulin on hematologic tumor cell lines (Molt-4, Daji, Daudi, K562) by interferon-α, β and γ in Vitro

Abstract

Tht effect of IFNs (α, β, γ) against β₂-microglobulin (β₂-m) of hematological tumor cell lines (Molt-4, Raji, Daudi, K562) was investigated. The cell lines were cultured with IFNs in different concentrations and culture times. The amount of cells's β₂-m in Molt-4 culture increased intensely by IFN-α, γ and increased with time up to 96 hours. In the Raji cell culture, the increase rates of cells's β₂-m by IFNs were less than 100%, however the increase rates of supernatants' β₂-m by IFN-α, β were higher than that of cells' β₂-m. In Molt-4, K562 culture, when compared with the Raji culture, and opposite conditions occurred. Cells' and supernatants' β₂-m in Daudi culture were not detected by enzyme immunoassay. Maximal expression of cells' β₂-m in K562 culture with IFNs were observed for one day, that rate with IFN-γ was about 2 times higher than IFN-α, β. Thus, expression of cells' β₂-m was observed to be stronger when tumor cell was cultured adding IFN which was produced by a cell similar to the cell line. It is suggested that β₂-m is an important marker against tumor active condition and IFN effects in vitro for tumor therapy.