Association and contribution of ERK to IL-6-induced activation of signal transducer and activator of transcription in a human myeloma cell line.

Abstract:

OBJECTIVE:To investigate the regulation effect of protein kinase ERK on the activation of transcription factor STAT3 in response to IL-6 in the Sko-007 human myeloma cell line. METHODS:Electrophoretic mobility shift assay (EMSA) and immunoprecipitation (IP) were used to show the activation of STAT3 and ERK in Sko-007 cells in the presence and absence of IL-6. Antisense oligonucloetides of ERK (ERK-AS) were transfected into Sko-007 cells to specifically inhibit the expression and activity of ERK. The changes in the activation of STAT3 in the transfected cells were also exhibited by EMSA. Direct binding between STAT3 and ERK was analyzed by co-IP. RESULTS:Both STAT3 and ERK were activated in Sko-007 cells stimulated with IL-6. ERK-AS inhibited STAT3 activation by IL-6. Moreover, activated ERK could form a complex with STAT3 in Sko-007 cells. CONCLUSION:ERK can bind STAT3 directly and be required for its maximal activation in Sko-007 cells stimulated by IL-6.

journal_name

Chin Med J (Engl)

journal_title

Chinese medical journal

authors

Song L,Shen B,Li Y

keywords:

subject

Has Abstract

pub_date

2001-09-01 00:00:00

pages

954-7

issue

9

eissn

0366-6999

issn

2542-5641

journal_volume

114

pub_type

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