passages.id: split_8_test_2993_passage
passages.type: progene_text
passages.text: DNA was extracted from peripheral blood mononuclear cells , and polymerase chain reaction - sequence specific primers ( PCR - SSP ) analysis was performed on promoter sequences of transforming growth factor beta1 ( TGF-beta1 ) , interleukin 6 ( IL-6 ) interleukin 10 ( IL-10 ) , tumor necrosis factor alpha ( TNF-alpha ) and interferon gamma ( INF-gamma ) .