PMID- 33580557 OWN - NLM STAT- MEDLINE DCOM- 20220124 LR - 20220124 IS - 1600-0897 (Electronic) IS - 1046-7408 (Linking) VI - 86 IP - 1 DP - 2021 Jul TI - Receptor-interacting protein kinase 2 contributes to host innate immune responses against Fusobacterium nucleatum in macrophages and decidual stromal cells. PG - e13403 LID - 10.1111/aji.13403 [doi] AB - PROBLEM: Chorioamnionitis is caused by a bacterial infection that ascends from the vagina and can cause adverse pregnancy outcomes (APOs). Fusobacterium nucleatum (F. nucleatum) is a periodontal pathogen associated with the occurrence of APOs. In this study, we evaluated whether receptor-interacting protein kinase 2 (Ripk2), an adaptor protein of the cytosolic receptors nucleotide-binding oligomerization domain (NOD)1 and NOD2, in macrophages and human decidual stromal cells (hDSCs) contributes to immune responses against F. nucleatum. METHOD OF STUDY: Bone marrow-derived macrophages (BMDMs) isolated from wild-type (WT) and Ripk2-deficient mice and hDSCs were cultured with F. nucleatum (MOI 1, 10, 100). BMDMs and hDSCs were assessed using enzyme-linked immunosorbent assay, Western blot analysis, real-time PCR, and nitrite assay. RESULTS: Fusobacterium nucleatum-induced production of IL-6, but not of TNF-alpha and IL-10, was lower in Ripk2-deficient BMDMs than in WT cells. Western blotting revealed a decrease in F. nucleatum-induced p65 phosphorylation in Ripk2-deficient macrophages, whereas mitogen-activated protein kinases activation was comparable between WT and Ripk2-deficient cells. The production of nitric oxide (NO) in response to F. nucleatum and the gene and protein expression of inducible NO synthase was impaired in Ripk2-deficient BMDMs. In hDSCs, F. nucleatum upregulated the gene and protein expression of NOD1, NOD2, and Ripk2 in a time-dependent manner. F. nucleatum also increased the production of IL-6, CXCL8, and CCL2, whereas this production was decreased by the Ripk2 inhibitors SB203580 and PP2. CONCLUSIONS: In conclusion, Ripk2 signaling appears to contribute to the F. nucleatum-induced immune response and can be a preventive and therapeutic target against APOs. CI - (c) 2021 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd. FAU - Park, Ji-Yeon AU - Park JY AD - Laboratory Animal Medicine, College of Veterinary Medicine, Chonnam National University, Gwangju, Republic of Korea. FAU - Lee, Tae-Sung AU - Lee TS AD - Laboratory Animal Medicine, College of Veterinary Medicine, Chonnam National University, Gwangju, Republic of Korea. FAU - Noh, Eui Jeong AU - Noh EJ AD - Department of Obstetrics and Gynecology, College of Medicine, Konyang University, Daejeon, Republic of Korea. FAU - Jang, Ah-Ra AU - Jang AR AD - Laboratory Animal Medicine, College of Veterinary Medicine, Chonnam National University, Gwangju, Republic of Korea. FAU - Ahn, Jae-Hun AU - Ahn JH AD - Laboratory Animal Medicine, College of Veterinary Medicine, Chonnam National University, Gwangju, Republic of Korea. FAU - Kim, Dong-Yeon AU - Kim DY AD - Laboratory Animal Medicine, College of Veterinary Medicine, Chonnam National University, Gwangju, Republic of Korea. FAU - Jung, Do-Hyeon AU - Jung DH AD - Laboratory Animal Medicine, College of Veterinary Medicine, Chonnam National University, Gwangju, Republic of Korea. FAU - Song, Eun-Jung AU - Song EJ AUID- ORCID: 0000-0002-1495-488X AD - Laboratory Animal Medicine, College of Veterinary Medicine, Chonnam National University, Gwangju, Republic of Korea. FAU - Lee, Yeon-Ji AU - Lee YJ AD - Laboratory Animal Medicine, College of Veterinary Medicine, Chonnam National University, Gwangju, Republic of Korea. FAU - Lee, Yun-Ji AU - Lee YJ AD - Laboratory Animal Medicine, College of Veterinary Medicine, Chonnam National University, Gwangju, Republic of Korea. FAU - Lee, Sung Ki AU - Lee SK AUID- ORCID: 0000-0002-6941-192X AD - Department of Obstetrics and Gynecology, College of Medicine, Konyang University, Daejeon, Republic of Korea. FAU - Park, Jong-Hwan AU - Park JH AD - Laboratory Animal Medicine, College of Veterinary Medicine, Chonnam National University, Gwangju, Republic of Korea. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20210324 PL - Denmark TA - Am J Reprod Immunol JT - American journal of reproductive immunology (New York, N.Y. : 1989) JID - 8912860 RN - 0 (Toll-Like Receptor 4) RN - EC 2.7.11.1 (Receptor-Interacting Protein Serine-Threonine Kinase 2) RN - EC 2.7.11.1 (Ripk2 protein, mouse) SB - IM MH - Animals MH - Cells, Cultured MH - Decidua/*pathology MH - Female MH - Fusobacterium Infections/*immunology MH - Fusobacterium nucleatum/*physiology MH - Host-Pathogen Interactions MH - Immunity, Innate MH - Macrophages/*immunology MH - Mice MH - Mice, Inbred C57BL MH - Mice, Knockout MH - Receptor-Interacting Protein Serine-Threonine Kinase 2/genetics/*metabolism MH - Stromal Cells/*immunology MH - Toll-Like Receptor 4/genetics/*metabolism OTO - NOTNLM OT - Fusobacterium nucleatum OT - Ripk2 OT - decidual stromal cells OT - macrophages EDAT- 2021/02/14 06:00 MHDA- 2022/01/27 06:00 CRDT- 2021/02/13 05:55 PHST- 2021/02/08 00:00 [revised] PHST- 2020/10/15 00:00 [received] PHST- 2021/02/09 00:00 [accepted] PHST- 2021/02/14 06:00 [pubmed] PHST- 2022/01/27 06:00 [medline] PHST- 2021/02/13 05:55 [entrez] AID - 10.1111/aji.13403 [doi] PST - ppublish SO - Am J Reprod Immunol. 2021 Jul;86(1):e13403. doi: 10.1111/aji.13403. Epub 2021 Mar 24.