title: Dual function of IL-33 on proliferation of NIH-3T3 cells.
abstract: The interleukin-33 (IL-33)-ST2L signaling pathway has been shown to play important roles in the field of immunology, especially as a trigger for allergic reactions such as bronchial asthma. However, coming back to the original finding that the ST2 gene is induced during initiation of the cell cycle of fibroblastic cell lines, the possible functions of the ST2 gene products and their specific ligand, IL-33, in the field of cell growth regulation are still interesting problems to be solved. In this study, we used NIH-3T3 mouse cell line and added IL-33 before and after cell proliferation assay, which revealed the dual function of IL-33. When IL-33 was added to the confluent cells before the start of cell proliferation, it suppressed the cell growth concentration-dependently. On the other hand, if IL-33 was added after the start of cell proliferation, it enhanced the cell growth. The negative effect of IL-33 on cell proliferation is a novel finding and would provide an important clue to the roles of IL-33 and ST2/ST2L in growth regulation.
authors.affiliation: Department of Biochemistry, Jichi Medical University, 3311-1 Yakushiji, Shimotsuke-shi, Tochigi 329-0498, Japan. Electronic address: shintomi@jichi.ac.jp.
authors.forename: Shin-Ichi
authors.initials: S
authors.lastname: Tominaga
authors.affiliation: Department of Biochemistry, Jichi Medical University, 3311-1 Yakushiji, Shimotsuke-shi, Tochigi 329-0498, Japan.
authors.forename: Kenji
authors.initials: K
authors.lastname: Tago
authors.affiliation: Department of Dermatology, Jichi Medical University, 3311-1 Yakushiji, Shimotsuke-shi, Tochigi 329-0498, Japan.
authors.forename: Hidetoshi
authors.initials: H
authors.lastname: Tsuda
authors.affiliation: Department of Dermatology, Jichi Medical University, 3311-1 Yakushiji, Shimotsuke-shi, Tochigi 329-0498, Japan.
authors.forename: Mayumi
authors.initials: M
authors.lastname: Komine
mesh_terms: D000818:Animals; D017209:Apoptosis / Q000187:drug effects; D049109:Cell Proliferation / Q000187:drug effects; D000067596:Interleukin-33; D007378:Interleukins / Q000494:pharmacology* / Q000502:physiology*; D008024:Ligands; D051379:Mice; D041681:NIH 3T3 Cells; D011994:Recombinant Proteins / Q000494:pharmacology
chemical_list: C506536:IL33 protein, human; C506535:Il33 protein, mouse; D000067596:Interleukin-33; D007378:Interleukins; D008024:Ligands; D011994:Recombinant Proteins
keywords: Cell growth; Fibroblast; IL-33; NIH-3T3 cells; ST2 gene