Article ; Online: Huang-Lian-Jie-Du decoction alleviates depressive-like behaviors in dextran sulfate sodium-induced colitis mice via Trem2/Dap12 pathway.
2023 Volume 315, Page(s) 116658
Abstract: Ethnopharmacological relevance: Huang-Lian-Jie-Du decoction (HLJD), a traditional Chinese medicine ...
Abstract | Ethnopharmacological relevance: Huang-Lian-Jie-Du decoction (HLJD), a traditional Chinese medicine prescription, has been implicated as effective in treating colitis, depression and inflammation-related diseases. Whether HLJD decoction could ameliorate colitis-induced depression was still unknown and the underlying mechanism was needed to be clarified. Aim of the study: Our study aimed to explore the effect and the underlying mechanism of HLJD treatment on colitis-induced depression and the involvement of the inflammatory factors and microglial-activated related genes. Materials and methods: The chronic colitis model was established by treating male mice with 1% dextran sulfate sodium (DSS) for 8 weeks. One week after DSS-treated, HLJD decoction was administered orally with 2 and 4 g/kg daily for 7 weeks. Behavior tests (Open field/Elevated plus maze/Novel object recognition) and TUNEL staining were then assessed. The expression of inflammatory-related genes and microglial dysregulation were measured by RT-PCR and the expression of Trem2, Danp12 and Iba1 were assessed by immunofluorescence methods. Results: Depressive-like behaviors were observed in mice treated with DSS, which suffered colitis. Compared to normal control (NC-V) mice, the density of TUNEL + cells in the habenula (Hb), hippocampus (HIP), and cortex were significantly higher in colitis (DSS-V) mice, especially in Hb. Compared to NC-V and several brain regions, the expression levels of the Il-1β, Il-10 and Dap12 mRNA were significantly increased in the lateral habenula (LHb) of colitis mice. Moreover, the expression of Trem2, Dap12 and Iba1 were increased in LHb of DSS-V mice. HLJD treatment could alleviate depressive-like behaviors, reduce the density of TUNEL + cells in Hb and the expression of Il-6, Il-10 and Dap12 mRNA in LHb of DSS-V mice. The overexpression of Trem2, Dap12 and Iba1 in LHb of DSS-V mice were reversed after HLJD treatment. Conclusion: These results reveal LHb is an important brain region during the process of colitis-induced depression. HLJD treatment could alleviates depressive-like behaviors in colitis mice via inhibiting the Trem2/Dap12 pathway in microglia of LHb, which would contribute to the precise treatment. It provides a potential mechanistic explanation for the effectiveness of HLJD treatment in colitis patients with depression. |
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MeSH term(s) | Male ; Animals ; Mice ; Interleukin-10/metabolism ; Dextran Sulfate ; Colitis/chemically induced ; Colitis/drug therapy ; Colitis/metabolism ; Drugs, Chinese Herbal/adverse effects ; Mice, Inbred C57BL ; Disease Models, Animal ; Colitis, Ulcerative/drug therapy ; Colon ; Membrane Glycoproteins/metabolism ; Receptors, Immunologic/metabolism |
Chemical Substances | oren gedoku to ; Interleukin-10 (130068-27-8) ; Dextran Sulfate (9042-14-2) ; Drugs, Chinese Herbal ; Trem2 protein, mouse ; Membrane Glycoproteins ; Receptors, Immunologic |
Language | English |
Publishing date | 2023-05-30 |
Publishing country | Ireland |
Document type | Journal Article |
ZDB-ID | 134511-4 |
ISSN | 1872-7573 ; 0378-8741 |
ISSN (online) | 1872-7573 |
ISSN | 0378-8741 |
DOI | 10.1016/j.jep.2023.116658 |
Database | MEDical Literature Analysis and Retrieval System OnLINE |
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