PMID- 24140411 OWN - NLM STAT- MEDLINE DCOM- 20140902 LR - 20161128 IS - 1878-1705 (Electronic) IS - 1567-5769 (Linking) VI - 17 IP - 4 DP - 2013 Dec TI - Cucurbitacin D is a new inflammasome activator in macrophages. PG - 1044-50 LID - S1567-5769(13)00371-8 [pii] LID - 10.1016/j.intimp.2013.10.003 [doi] AB - We previously reported that cucurbitacin D isolated from Trichosanthes kirilowii has anti-tumor roles to leukemia cells. However, the effect of cucurbitacin D on immune cells is not fully understood although there is no toxic activity to normal cells. In this study, immunomodulating activities of cucurbitacin D were investigated in macrophages. Cucurbitacin D could increase LPS-induced interleukin (IL)-1beta production in culture supernatant of THP-1 cells, peritoneal exudate cells (PECs), bone marrow derived macrophages (BMDMs), and RAW264 cells. At the transcriptional level, cucurbitacin D enhanced LPS-induced IL-1beta mRNA expression through activation of ERK1/2 mitogen-activated protein kinases (MAPKs). At the posttranscriptional level, the activation of caspase-1 induced by cucurbitacin D has also been demonstrated following treatment with a caspase-1 inhibitor and siRNA. Importantly, cucurbitacin D has further been shown to induce inflammasome activation independent of ERK1/2 activation. Western blotting showed interaction of NOD-like receptor family, pyrin domain containing 3 (NALP3) and apoptosis-associated speck-like protein containing a caspase-activating and recruitment domain (ASC), suggesting activation of the inflammasome and a possible reason for activation of caspase-1. Taken together, these results suggest that cucurbitacin D could initiate immunomodulating activity in macrophages to lead to inflammasome activation as well as enhancement of LPS signaling. CI - (c) 2013. FAU - Song, Yuan AU - Song Y AD - Department of Immunology and Parasitology, School of Medicine, University of Occupational and Environmental Health, Japan, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu 807-8555, Japan. FAU - Ding, Ning AU - Ding N FAU - Kanazawa, Tamotsu AU - Kanazawa T FAU - Yamashita, Uki AU - Yamashita U FAU - Yoshida, Yasuhiro AU - Yoshida Y LA - eng PT - Journal Article DEP - 20131016 PL - Netherlands TA - Int Immunopharmacol JT - International immunopharmacology JID - 100965259 RN - 0 (Immunologic Factors) RN - 0 (Inflammasomes) RN - 0 (Interleukin-1beta) RN - 0 (Lipopolysaccharides) RN - 0 (Triterpenes) RN - 5I62H4ORC7 (cucurbitacin D) RN - EC 2.7.11.24 (Mitogen-Activated Protein Kinase 1) RN - EC 2.7.11.24 (Mitogen-Activated Protein Kinase 3) SB - IM MH - Animals MH - Bone Marrow Cells/cytology MH - Cell Line MH - Cells, Cultured MH - Immunologic Factors/*pharmacology MH - Inflammasomes/drug effects/immunology MH - Interleukin-1beta/genetics/*immunology MH - Lipopolysaccharides MH - Macrophages/*drug effects/immunology MH - Mice MH - Mice, Inbred BALB C MH - Mitogen-Activated Protein Kinase 1/immunology MH - Mitogen-Activated Protein Kinase 3/immunology MH - Triterpenes/*pharmacology OTO - NOTNLM OT - ASC OT - BMDMs OT - Cucurbitacin D OT - ERK1/2 OT - IL-1beta OT - Inflammasome OT - LDH OT - MAPKs OT - Macrophages OT - NALP3 OT - NOD-like receptor family, pyrin domain containing 3 OT - PECs OT - THMs OT - TLR OT - Toll-like receptor OT - apoptosis-associated speck-like protein containing a caspase-activating and recruitment domain OT - bone marrow derived macrophages OT - lactate dehydrogenase OT - mitogen-activated protein kinases OT - peritoneal exudate cells OT - traditional medicinal herbs EDAT- 2013/10/22 06:00 MHDA- 2014/09/03 06:00 CRDT- 2013/10/22 06:00 PHST- 2013/08/21 00:00 [received] PHST- 2013/09/30 00:00 [revised] PHST- 2013/10/03 00:00 [accepted] PHST- 2013/10/22 06:00 [entrez] PHST- 2013/10/22 06:00 [pubmed] PHST- 2014/09/03 06:00 [medline] AID - S1567-5769(13)00371-8 [pii] AID - 10.1016/j.intimp.2013.10.003 [doi] PST - ppublish SO - Int Immunopharmacol. 2013 Dec;17(4):1044-50. doi: 10.1016/j.intimp.2013.10.003. Epub 2013 Oct 16.