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Long Q, Ma T, Wang Y, Chen S, Tang S, Wang T, Zhou Y, Xu K, Wan P, Cao Y. Orientin alleviates the inflammatory response in psoriasis like dermatitis in BALB/c mice by inhibiting the MAPK signaling pathway. Int Immunopharmacol 2024; 134:112261. [PMID: 38761783 DOI: 10.1016/j.intimp.2024.112261] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2024] [Revised: 05/09/2024] [Accepted: 05/11/2024] [Indexed: 05/20/2024]
Abstract
BACKGROUND Psoriasis, a chronic inflammatory condition of the skin, is characterized by an atypical proliferation of epidermal keratinocytes and immune cell infiltration. Orientin is a flavonoid monomer with potent anti-inflammatory activities. However, the therapeutic effects of orientin on psoriasis and the underlying mechanisms have not been elucidated. OBJECTIVE To investigate the therapeutic effect of orientin on psoriasis and the underlying mechanisms using network pharmacology and experimental studies. METHODS A psoriasis-like mouse model was established using imiquimod (IMQ). Lipopolysaccharide (LPS) was used to stimulate the RAW264.7 and HaCaT cells in vitro. The therapeutic effects of orientin and the underlying mechanism were analyzed using histopathological, immunohistochemical, quantitative real-time polymerase chain reaction, enzyme-linked immunosorbent assay, flow cytometry, and western blotting analyses. RESULTS Orientin ameliorated skin lesions and suppressed keratinocyte proliferation and immune cell infiltration in the IMQ-induced psoriasis-like mouse model. Additionally, orientin inhibited the secretion of the pro-inflammatory factors interleukin (IL)-1β, tumor necrosis factor (TNF)-α, IL-6, IL-8, IL-17, and IL-23 in the psoriasis-like mouse model and LPS-induced RAW264.7 and HaCaT cells. Furthermore, orientin mitigated the LPS-induced upregulation of reactive oxygen species and downregulation of IL-10 and glutathione levels. Orientin alleviated inflammation by downregulating the MAPK signaling pathway. CONCLUSION Orientin alleviated psoriasis-like dermatitis by suppressing the MAPK signaling pathway, suggesting that orientin is a potential therapeutic for psoriasis.
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Affiliation(s)
- Qiu Long
- School of Clinical Medicine, Guizhou Medical University, Guiyang, Guizhou 550000, China; Molecular Biology Laboratory, Guizhou Medical University, Guiyang, Guizhou 550000, China
| | - Ting Ma
- Department of Dermatology, Guizhou Provincial People's Hospital, Guiyang, Guizhou 550000, China
| | - Ye Wang
- School of Clinical Medicine, Guizhou Medical University, Guiyang, Guizhou 550000, China
| | - Shaojie Chen
- School of Clinical Medicine, Guizhou Medical University, Guiyang, Guizhou 550000, China; Department of Hepatobiliary Surgery, Guizhou Medical University Hospital, Guiyang, Guizhou 550000, China
| | - Shanshan Tang
- School of Clinical Medicine, Guizhou Medical University, Guiyang, Guizhou 550000, China
| | - Tao Wang
- School of Clinical Medicine, Guizhou Medical University, Guiyang, Guizhou 550000, China
| | - Yi Zhou
- School of Clinical Medicine, Guizhou Medical University, Guiyang, Guizhou 550000, China
| | - Kexin Xu
- School of Clinical Medicine, Guizhou Medical University, Guiyang, Guizhou 550000, China
| | - Pengjie Wan
- Department of Dermatology, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China; Department of Dermatology, Guizhou Branch of Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, Guiyang, Guizhou 550000, China.
| | - Yu Cao
- Department of Dermatology, Guizhou Medical University Hospital, Guiyang, Guizhou 550000, China.
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Skočková V, Raptová P, Pospíchalová K, Sovadinová I, Sychrová E, Smutná M, Hilscherová K, Babica P, Šindlerová L. Cyanobacterial harmful bloom lipopolysaccharides: pro-inflammatory effects on epithelial and immune cells in vitro. Arch Toxicol 2024; 98:481-491. [PMID: 38063875 PMCID: PMC10794361 DOI: 10.1007/s00204-023-03644-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Accepted: 11/16/2023] [Indexed: 01/18/2024]
Abstract
Cyanobacterial harmful blooms (CyanoHABs) pose a global ecological problem, and their lipopolysaccharides (LPS) are among the bioactive compounds they release. Previous studies on CyanoHAB-LPS from single cyanobacterial species have shown varying bioactivities in different in vitro cell models. In this study, we isolated LPS from 19 CyanoHAB samples collected at 18 water bodies in the Czech Republic over two consecutive seasons. The proportions of cyanobacteria, Gram-negative bacteria (G-), and other bacteria in the biomass were determined by qPCR, while the cyanobacterial genera were identified using light microscopy. In vitro models of keratinocytes (HaCaT), the intestinal epithelium (co-culture of differentiated Caco-2 cells and peripheral blood mononuclear cells - PBMC), and PBMC alone were treated with isolated LPS at concentrations of 50, 100, and 1 µg/ml, respectively. The endotoxin activities of these concentrations were within the range measured in the aquatic environment. Approximately 85-90% of the samples displayed biological activity. However, the potency of individual LPS effects and response patterns varied across the different in vitro models. Furthermore, the observed activities did not exhibit a clear correlation with the taxonomic composition of the phytoplankton community, the relative share of microbial groups in the biomass, endotoxin activity of the LPS, or LPS migration and staining pattern in SDS-PAGE. These findings suggest that the effects of CyanoHAB-LPS depend on the specific composition and abundance of various LPS structures within the complex environmental sample and their interactions with cellular receptors.
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Affiliation(s)
- V Skočková
- Department of Biophysics of Immune System, Institute of Biophysics of the Czech Academy of Sciences, Brno, 61200, Czech Republic
- Department of Experimental Biology, Faculty of Science, Masaryk University, Brno, 62500, Czech Republic
| | - P Raptová
- Department of Biophysics of Immune System, Institute of Biophysics of the Czech Academy of Sciences, Brno, 61200, Czech Republic
- Department of Experimental Biology, Faculty of Science, Masaryk University, Brno, 62500, Czech Republic
| | - K Pospíchalová
- Department of Biophysics of Immune System, Institute of Biophysics of the Czech Academy of Sciences, Brno, 61200, Czech Republic
| | - I Sovadinová
- RECETOX, Faculty of Science, Masaryk University, Brno, 62500, Czech Republic
| | - E Sychrová
- RECETOX, Faculty of Science, Masaryk University, Brno, 62500, Czech Republic
| | - M Smutná
- RECETOX, Faculty of Science, Masaryk University, Brno, 62500, Czech Republic
| | - K Hilscherová
- RECETOX, Faculty of Science, Masaryk University, Brno, 62500, Czech Republic
| | - P Babica
- RECETOX, Faculty of Science, Masaryk University, Brno, 62500, Czech Republic
- Department of Experimental Phycology and Ecotoxicology, Institute of Botany of the Czech Academy of Sciences, Brno, 60200, Czech Republic
| | - L Šindlerová
- Department of Biophysics of Immune System, Institute of Biophysics of the Czech Academy of Sciences, Brno, 61200, Czech Republic.
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Raptová P, Skočková V, Babica P, Sovadinová I, Sychrová E, Vídeňská P, Šplíchalová P, Vašíček O, Šindlerová L. Cyanobacterial bloom-associated lipopolysaccharides induce pro-inflammatory processes in keratinocytes in vitro. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2024; 105:104342. [PMID: 38092246 DOI: 10.1016/j.etap.2023.104342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Revised: 10/23/2023] [Accepted: 12/08/2023] [Indexed: 12/24/2023]
Abstract
Our previous studies have shown that CyanoHAB LPS (lipopolysaccharides) and LPS from cyanobacterial cultures induce pro-inflammatory effects on intestinal epithelial and immune cells in vitro. To expand our understanding, we investigated their impact on human keratinocytes, which are targeted during water recreational activities. LPS samples were isolated from CyanoHAB biomasses dominated by Microcystis, Aphanizomenon, Planktothrix, and Dolichospermum, or from axenic cultures of these genera. We identified two CyanoHAB biomasses containing a high proportion of Gram-negative bacteria, including potentially pathogenic genera. These biomasses showed the highest induction of interleukin (IL) 8, IL-6, C-C motif chemokine ligand (CCL) 2 (also known as MCP-1), and CCL20 production by HaCaT cells. Interestingly, all CyanoHAB-derived LPS and LPS from axenic cultures (except for Microcystis) accelerated cell proliferation and migration. Our findings highlight the role of G- bacteria composition and LPS structural disparities in influencing these effects, with implications for skin health during recreational activities.
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Affiliation(s)
- P Raptová
- Department of Biophysics of Immune System, Institute of Biophysics of the Czech Academy of Sciences, Brno 61200, Czech Republic; Department of Experimental Biology, Faculty of Science, Masaryk University, Brno 62500, Czech Republic.
| | - V Skočková
- Department of Biophysics of Immune System, Institute of Biophysics of the Czech Academy of Sciences, Brno 61200, Czech Republic; Department of Experimental Biology, Faculty of Science, Masaryk University, Brno 62500, Czech Republic.
| | - P Babica
- RECETOX, Faculty of Science, Masaryk University, Brno 62500, Czech Republic; Department of Experimental Phycology and Ecotoxicology, Institute of Botany of the Czech Academy of Sciences, Brno 60200, Czech Republic.
| | - I Sovadinová
- RECETOX, Faculty of Science, Masaryk University, Brno 62500, Czech Republic.
| | - E Sychrová
- RECETOX, Faculty of Science, Masaryk University, Brno 62500, Czech Republic.
| | - P Vídeňská
- RECETOX, Faculty of Science, Masaryk University, Brno 62500, Czech Republic.
| | - P Šplíchalová
- RECETOX, Faculty of Science, Masaryk University, Brno 62500, Czech Republic.
| | - O Vašíček
- Department of Biophysics of Immune System, Institute of Biophysics of the Czech Academy of Sciences, Brno 61200, Czech Republic.
| | - L Šindlerová
- Department of Biophysics of Immune System, Institute of Biophysics of the Czech Academy of Sciences, Brno 61200, Czech Republic.
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