PMID- 32308013 OWN - NLM STAT- MEDLINE DCOM- 20200827 LR - 20200827 IS - 1793-6853 (Electronic) IS - 0192-415X (Linking) VI - 48 IP - 3 DP - 2020 TI - Magnoliae Flos Essential Oil as an Immunosuppressant in Dendritic Cell Activation and Contact Hypersensitivity Responses. PG - 597-613 LID - 10.1142/S0192415X20500305 [doi] AB - Magnoliae Flos is a commonly used traditional medicinal material in Asia. It is used to treat sinusitis, nasal congestion, and hypersensitive skin. Because Magonlia Flos was described as an aromatic material in ancient Chinese texts, we hypothesized that its essential oil may be used to treat immune disorders. Dendritic cells (DCs), regarded as a major target of immunomodulators to control immune responses, play a critical role in the adaptive immune response. In this study, Magnoliae Flos essential oil (MFEO) decreased the production of the cytokines TNF-alpha, IL-6, and IL-12p70 in lipopolysaccharide (LPS)-stimulated DCs. It also suppressed the surface markers MHC II, CD80, and CD86 in LPS-stimulated DCs. Animal models demonstrated that the 2,4-Dinitro-1-fluorobenzene (DNFB) inducing a contact hypersensitivity response was inhibited following treatment with MFEO. In addition, MFEO inhibited the infiltration of T cells in the ears of DNFB-induced mice. To explore its bioactive compounds, the components of MFEO were analyzed using gas chromatography (GC) and GC-mass spectrometry. The results revealed that the major compounds in MFEO are camphor and 1,8-cineole. Additional DC bioassays confirmed that these compounds substantially suppressed cytokine production in LPS-induced DCs. Therefore, we demonstrated that MFEO exhibits an immunosuppressive effect both in vivo and in vitro, and camphor and 1,8-cineole may be the major components responsible for its immunosuppressive ability. The findings indicate that MFEO has the potential to be developed as a new immunosuppressant for excessive diseases. FAU - Chen, Chun-Hsien AU - Chen CH AD - Department of Chinese Pharmaceutical Sciences and Chinese Medicine Resources, College of Chinese Medicine, National Cheng Kung University, Tainan, Taiwan. AD - Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung University, Tainan, Taiwan. FAU - Chen, Hsin-Chun AU - Chen HC AD - Department of Cosmeceutics, College of Biopharmaceutical and Food Sciences, China Medical University, Taichung, Taiwan. FAU - Chang, Wen-Te AU - Chang WT AD - Department of Chinese Pharmaceutical Sciences and Chinese Medicine Resources, College of Chinese Medicine, National Cheng Kung University, Tainan, Taiwan. FAU - Lee, Meng-Shiou AU - Lee MS AD - Department of Chinese Pharmaceutical Sciences and Chinese Medicine Resources, College of Chinese Medicine, National Cheng Kung University, Tainan, Taiwan. FAU - Liu, Yi-Chen AU - Liu YC AD - Department of Chinese Pharmaceutical Sciences and Chinese Medicine Resources, College of Chinese Medicine, National Cheng Kung University, Tainan, Taiwan. AD - Institute of Medical Technology, College of Life Science, National Chung Hsing University, Taichung, Taiwan. FAU - Lin, Ming-Kuem AU - Lin MK AD - Department of Chinese Pharmaceutical Sciences and Chinese Medicine Resources, College of Chinese Medicine, National Cheng Kung University, Tainan, Taiwan. LA - eng PT - Journal Article DEP - 20200417 PL - Singapore TA - Am J Chin Med JT - The American journal of Chinese medicine JID - 7901431 RN - 0 (Cytokines) RN - 0 (Immunosuppressive Agents) RN - 0 (Oils, Volatile) RN - 76-22-2 (Camphor) RN - RV6J6604TK (Eucalyptol) SB - IM MH - Adaptive Immunity/*drug effects MH - Animals MH - Camphor/analysis/isolation & purification MH - Cells, Cultured MH - Cytokines/metabolism MH - Dendritic Cells/*immunology/metabolism MH - Dermatitis, Contact/*drug therapy/*immunology MH - Disease Models, Animal MH - Eucalyptol/analysis/isolation & purification MH - *Immunosuppressive Agents MH - Magnoliaceae/*chemistry MH - Mice MH - Oils, Volatile/chemistry/*pharmacology/*therapeutic use MH - *Phytotherapy MH - T-Lymphocytes/immunology OTO - NOTNLM OT - Contact Hypersensitivity Response OT - Dendritic Cells OT - Essential Oil OT - Magnoliae Flos EDAT- 2020/04/21 06:00 MHDA- 2020/08/28 06:00 CRDT- 2020/04/21 06:00 PHST- 2020/04/21 06:00 [pubmed] PHST- 2020/08/28 06:00 [medline] PHST- 2020/04/21 06:00 [entrez] AID - 10.1142/S0192415X20500305 [doi] PST - ppublish SO - Am J Chin Med. 2020;48(3):597-613. doi: 10.1142/S0192415X20500305. Epub 2020 Apr 17.