PMID- 37446928 OWN - NLM STAT- MEDLINE DCOM- 20230717 LR - 20230718 IS - 1420-3049 (Electronic) IS - 1420-3049 (Linking) VI - 28 IP - 13 DP - 2023 Jul 7 TI - Formononetin Inhibits Mast Cell Degranulation to Ameliorate Compound 48/80-Induced Pseudoallergic Reactions. LID - 10.3390/molecules28135271 [doi] LID - 5271 AB - Formononetin (FNT) is a plant-derived isoflavone natural product with anti-inflammatory, antioxidant, and anti-allergic properties. We showed previously that FNT inhibits immunoglobulin E (IgE)-dependent mast cell (MC) activation, but the effect of FNT on IgE-independent MC activation is yet unknown. Our aim was to investigate the effects and possible mechanisms of action of FNT on IgE-independent MC activation and pseudoallergic inflammation. We studied the effects of FNT on MC degranulation in vitro with a cell culture model using compound C48/80 to stimulate either mouse bone marrow-derived mast cells (BMMCs) or RBL-2H3 cells. We subsequently measured beta-hexosaminase and histamine release, the expression of inflammatory factors, cell morphological changes, and changes in NF-kappaB signaling. We also studied the effects of FNT in several in vivo murine models of allergic reaction: C48/80-mediated passive cutaneous anaphylaxis (PCA), active systemic anaphylaxis (ASA), and 2,4-dinitrobenzene (DNCB)-induced atopic dermatitis (AD). The results showed that FNT inhibited IgE-independent degranulation of MCs, evaluated by a decrease in the release of beta-hexosaminase and histamine and a decreased expression of inflammatory factors. Additionally, FNT reduced cytomorphological elongation and F-actin reorganization and attenuated NF-kappaB p65 phosphorylation and NF-kappaB-dependent promoter activity. Moreover, the administration of FNT alleviated pseudoallergic responses in vivo in mouse models of C48/80-stimulated PCA and ASA, and DNCB-induced AD. In conclusion, we suggest that FNT may be a novel anti-allergic drug with great potential to alleviate pseudoallergic responses via the inhibition of IgE-independent MC degranulation and NF-kappaB signaling. FAU - Zhou, Zi-Wen AU - Zhou ZW AUID- ORCID: 0000-0002-0570-079X AD - Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Shenzhen University Medical School, Shenzhen University, No. 1066 Xueyuan Road, Nanshan District, Shenzhen 518055, China. FAU - Zhu, Xue-Yan AU - Zhu XY AUID- ORCID: 0000-0003-3513-8221 AD - Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Shenzhen University Medical School, Shenzhen University, No. 1066 Xueyuan Road, Nanshan District, Shenzhen 518055, China. FAU - Li, Shu-Ying AU - Li SY AUID- ORCID: 0009-0002-6744-0222 AD - Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Shenzhen University Medical School, Shenzhen University, No. 1066 Xueyuan Road, Nanshan District, Shenzhen 518055, China. FAU - Lin, Si-En AU - Lin SE AUID- ORCID: 0009-0005-2312-8669 AD - Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Shenzhen University Medical School, Shenzhen University, No. 1066 Xueyuan Road, Nanshan District, Shenzhen 518055, China. FAU - Zhu, Yu-Han AU - Zhu YH AUID- ORCID: 0009-0000-9103-0966 AD - Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Shenzhen University Medical School, Shenzhen University, No. 1066 Xueyuan Road, Nanshan District, Shenzhen 518055, China. FAU - Ji, Kunmei AU - Ji K AUID- ORCID: 0000-0002-5754-8697 AD - Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Shenzhen University Medical School, Shenzhen University, No. 1066 Xueyuan Road, Nanshan District, Shenzhen 518055, China. FAU - Chen, Jia-Jie AU - Chen JJ AUID- ORCID: 0000-0002-1372-8450 AD - Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Shenzhen University Medical School, Shenzhen University, No. 1066 Xueyuan Road, Nanshan District, Shenzhen 518055, China. LA - eng GR - 82071806/National Natural Science Foundation of China/ GR - 2023A1515012935/Guangdong Basic and Applied Basic Research Foundation/ PT - Journal Article DEP - 20230707 PL - Switzerland TA - Molecules JT - Molecules (Basel, Switzerland) JID - 100964009 RN - 295DQC67BJ (formononetin) RN - 4091-50-3 (p-Methoxy-N-methylphenethylamine) RN - 0 (NF-kappa B) RN - 0 (Dinitrochlorobenzene) RN - 0 (Isoflavones) RN - 37341-29-0 (Immunoglobulin E) RN - 0 (Anti-Allergic Agents) SB - IM MH - Mice MH - Animals MH - Mast Cells MH - p-Methoxy-N-methylphenethylamine/pharmacology MH - NF-kappa B/metabolism MH - Cell Degranulation MH - Dinitrochlorobenzene/metabolism MH - *Anaphylaxis/drug therapy MH - *Isoflavones/metabolism MH - Immunoglobulin E/metabolism MH - *Anti-Allergic Agents/therapeutic use PMC - PMC10343653 OTO - NOTNLM OT - compound 48/80 OT - formononetin OT - mast cell OT - non-IgE OT - pseudoallergic reaction COIS- The authors declare that they have no competing interests exist. EDAT- 2023/07/14 13:07 MHDA- 2023/07/17 06:42 PMCR- 2023/07/07 CRDT- 2023/07/14 01:20 PHST- 2023/06/25 00:00 [received] PHST- 2023/07/04 00:00 [revised] PHST- 2023/07/04 00:00 [accepted] PHST- 2023/07/17 06:42 [medline] PHST- 2023/07/14 13:07 [pubmed] PHST- 2023/07/14 01:20 [entrez] PHST- 2023/07/07 00:00 [pmc-release] AID - molecules28135271 [pii] AID - molecules-28-05271 [pii] AID - 10.3390/molecules28135271 [doi] PST - epublish SO - Molecules. 2023 Jul 7;28(13):5271. doi: 10.3390/molecules28135271.