title: SCF/C-KIT signaling modulates tryptase expression in acute myeloid leukemia cells.
abstract: Tryptase is a serine protease with a variety of biological functions. Recently, elevated serum tryptase has been detected in certain patients with acute myeloid leukemia (AML). However, the underlying mechanism for the regulation of tryptase expression remains elusive. In this study, we aimed to investigate the role of stem cell factor (SCF)/C-KIT signaling in regulating the expression of tryptase in AML cells. We found a significant positive correlation between tryptase and C-KIT expression levels in AML patients. Furthermore, real-time PCR, Western blot and ELISA analysis showed that SCF upregulated tryptase mRNA and protein expression in U937 cells, and that this effect was abolished by pretreatment with PD98059 and SB230580. In addition, levels of phosphorylated ERK1/2 and p38MAPK correlated with tryptase levels. Taken together, these data suggest that the expression of tryptase is regulated by SCF/C-KIT signaling via the ERK1/2 and p38MAPK pathways.
authors.affiliation: Department of Hematology, The First Affiliated Hospital of China Medical University, No. 155, Nanjing North Street, Shenyang, 110001, China.
authors.forename: Jingchun
authors.initials: J
authors.lastname: Jin
authors.forename: Yan
authors.initials: Y
authors.lastname: Li
authors.forename: Yue
authors.initials: Y
authors.lastname: Wang
authors.forename: Pingping
authors.initials: P
authors.lastname: Wang
authors.forename: Yazhu
authors.initials: Y
authors.lastname: Wang
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000627:therapeutic use; D016022:Case-Control Studies; D045744:Cell Line, Tumor; D002869:Chromosome Aberrations; D004252:DNA Mutational Analysis; D005260:Female; D015973:Gene Expression Regulation, Leukemic / Q000187:drug effects; D006801:Humans; D015470:Leukemia, Myeloid, Acute / Q000175:diagnosis / Q000188:drug therapy / Q000235:genetics* / Q000378:metabolism*; D020935:MAP Kinase Signaling System / Q000187:drug effects; D008297:Male; D008875:Middle Aged; D009154:Mutation; D019009:Proto-Oncogene Proteins c-kit / Q000378:metabolism*; D012333:RNA, Messenger / Q000235:genetics; D015398:Signal Transduction; D019089:Stem Cell Factor / Q000378:metabolism* / Q000494:pharmacology; D053802:Tryptases / Q000235:genetics*; D020298:U937 Cells; D055815:Young Adult
chemical_list: D012333:RNA, Messenger; D019089:Stem Cell Factor; D019009:Proto-Oncogene Proteins c-kit; D053802:Tryptases