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BACKGROUND: Rheumatoid arthritis (RA) is an autoimmune inflammatory disease that primarily affects the joints. Individuals at risk for RA and people with RA develop intestinal dysbiosis. The changes in intestinal flora composition in preclinical and confirmed RA patients suggest that intestinal flora imbalance may play an important role in the induction and persistence of RA. METHODS: Based on the current research on the interaction between RA and intestinal microbiota, intestinal microbiota metabolites and intestinal barrier changes. This paper systematically summarized the changes in intestinal microbiota in RA patients, the metabolites of intestinal flora, and the influence mechanism of intestinal barrier on RA, and further discussed the influence of drugs for RA on intestinal flora and its mechanism of action. RESULTS: Compared with healthy controls, α diversity analysis of intestinal flora showed no significant difference, ß diversity analysis showed significant differences. The intestinal flora produces bioactive metabolites, such as short-chain fatty acids and aromatic amino acids, which have anti-inflammatory effects. Abnormal intestinal flora leads to impaired barrier function and mucosal immune dysfunction, promoting the development of inflammation. Traditional Chinese medicine (TCM) and chemical drugs can also alleviate RA by regulating intestinal flora, intestinal flora metabolites, and intestinal barrier. Intestinal flora is closely related to the pathogenesis of RA and may become potential biomarkers for the diagnosis and treatment of RA. CONCLUSIONS: Intestinal flora and its metabolites play an important role in the pathogenesis of autoimmune diseases such as RA, and are expected to become a new target for clinical diagnosis and treatment, providing a new idea for targeted treatment of RA.
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Artrite Reumatoide , Doenças Autoimunes , Microbioma Gastrointestinal , Humanos , Artrite Reumatoide/tratamento farmacológico , Intestinos , InflamaçãoRESUMO
A Gram-positive, acid-fast, aerobic, rapidly growing and non-motile strain was isolated from lead-zinc mine tailing sampled in Lanping, Yunnan province, Southwest China. 16S rRNA gene sequence analysis showed that the most closely related species of strain KC 300T was Mycolicibacterium litorale CGMCC 4.5724T (98.47â%). Additionally, phylogenomic and specific conserved signature indel analysis revealed that strain KC 300T should be a member of genus Mycolicibacterium, and Mycobacterium palauense CECT 8779T and Mycobacterium grossiae DSM 104744T should also members of genus Mycolicibacterium. The genome size of strain KC 300T was 6.2 Mb with an in silico DNA G+C content of 69.2 mol%. Chemotaxonomic characteristics of strain KC 300T were also consistent with the genus Mycolicibacterium. The average nucleotide identity, digital DNA-DNA hybridization and average amino acid identity values, as well as phenotypic, physiological and biochemical characteristics, support that strain KC 300T represents a new species within the genus Mycolicibacterium, for which the name Mycolicibacterium arseniciresistens sp. nov. is proposed, with the type strain KC 300T (=CGMCC 1.19494T=JCM 35915T). In addition, we reclassified Mycobacterium palauense and Mycobacterium grossiae as Mycolicibacterium palauense comb. nov. and Mycolicibacterium grossiae comb. nov., respectively.
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Mycobacterium , Zinco , RNA Ribossômico 16S/genética , Composição de Bases , China , Filogenia , Análise de Sequência de DNA , DNA Bacteriano/genética , Técnicas de Tipagem Bacteriana , Ácidos Graxos/química , Mycobacterium/genéticaRESUMO
The structural modification of curcumin has always been a hotspot in drug development. In this paper, a class of cinnamylaldehyde-derived mono-carbonyl curcumin analogs (MCAs) with 7-carbon-links were designed and synthesized and their anticancer properties were evaluated. Through screening anti-gastric cancer activity of these compounds, H1 exhibited the strongest cytotoxic activity by inhibiting cell viability and colony formation, inducing cell cycle G2/M phase arrest in vitro (SGC-7901 and AGS gastric cancer cells). Moreover, the SGC-7901 subcutaneous tumor-bearing mice studies revealed that H1 significantly inhibited the tumor growth of gastric cancer. We explored the possible potential targets of H1 through network pharmacology. Mechanistically, our results demonstrated that H1 showed potential anti-gastric cancer activity through suppression of the STAT3 and AKT signaling pathway in vitro and in vivo, which was validated by molecular docking. Overall, our results indicate the potential of H1 as a potent chemotherapeutic drug against gastric cancer.
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Antineoplásicos , Curcumina , Neoplasias Gástricas , Animais , Camundongos , Curcumina/química , Proteínas Proto-Oncogênicas c-akt , Neoplasias Gástricas/patologia , Simulação de Acoplamento Molecular , Linhagem Celular Tumoral , Proliferação de Células , Apoptose , Antineoplásicos/químicaRESUMO
The limited excitation efficiency of quantum dots in the detection of subsurface defects in optical elements by quantum dot fluorescence gives rise to insufficient accuracy. To enhance the excitation efficiency of quantum dots, we studied the modulation of the polarization direction of linearly polarized incident light on quantum dot fluorescence. We first apply density matrix evolution theory to study the quantum dots interacting with linearly polarized incident light and emitting fluorescence. The fluorescence intensity exhibits cosine oscillations versus modulated laser polarization. It reaches a maximum value at the polarization angle zero, and then decreases as the angle becomes larger until π/2. The experimental results for the quantum dot in both solutions and subsurface defect of optical elements confirmed these results. For optical elements tagged with CdSe/ZnS quantum dots, the fluorescence intensity increases by 61.7%, and the area for the detected subsurface defects increases by 142.9%. Similarly, for C and InP/ZnS quantum dots, there are also increases in both the fluorescence intensity and the area of subsurface defects. Our study suggests that the subsurface defect detection in optical elements by the linearly polarized incident light could enhance the detection accuracy of subsurface defects in optical elements, and potentially achieve super-resolution imaging of subsurface defects.
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The effect and mechanism of Huangqin Qingre Chubi Capsules(HQC) on rheumatoid arthritis(RA) were studied.Seventy male SPF rats were randomly divided into normal group, model group, low-(0. 18 g·kg~(-1)), middle-(0. 36 g·kg~(-1)), and high-(0. 72 g·kg~(-1)) dose groups of HQC, methotrexate group(MTX, 0. 75 mg·kg~(-1)), and negative control group(NC group, model +saline). Adjuvant arthritis fibroblast-like synoviocytes(AA-FLS) were divided into normal group, model group, low-, middle-, and high-dose groups of HQC, and negative control group. RT-qPCR and Western blot were used to detect the m RNA and protein expressions of METTL3, SFRP4, ß-catenin, CCND1, c-Myc, MMP3, and fibronectin. The protein expression of MMP3 and ß-catenin was detected by immunofluorescence. The gene expression level of METTL3 on AA-FLS was knocked down to further examine the expression of each gene. ELISA measured the levels of IL-1ß, IL-6, and IL-8. The results showed that compared with the normal group, rats in the model group found redness and swelling in their limbs and significantly increased joint swelling. Compared with the model group, the joint swelling degree of each treatment group significantly decreased(P<0. 05). The paw retraction threshold and body weight mass index both significantly increased(P<0. 05). METTL3 was highly expressed on AA and negatively correlated with the expression of SFRP4. After treatment, the m RNA and protein expression of METTL3, ß-catenin, CCND1, c-Myc, fibronectin, and MMP3 were significantly decreased on AA-FLS(P< 0. 05). Compared with the model group, knocking down METTL3 resulted in reduced m RNA and protein expression of ß-catenin, CCND1, c-Myc, fibronectin, and MMP3(P< 0. 05). At the same time, the m RNA and protein expressions of ß-catenin, CCND1, c-Myc, fibronectin, and MMP3 in the HQC+METTL3 knockdown group were significantly lower than those in the METTL3 knockdown group(P<0. 05). HQC could reduce the levels of IL-1ß, IL-6, and IL-8 to varying degrees(P<0. 05). The results indicate that HQC has a significant improvement effect on arthritis in AA rats. The expression of METTL3 is significantly increased in synovial tissue and AA-FLS of AA rats, which may be a potential target for the diagnosis and treatment of RA. HQC improves RA through the METTL3-SFRP4/Wnt/ß-catenin signaling pathway and has significant antiinflammatory and anti-rheumatic effects.
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Artrite Reumatoide , Cápsulas , Medicamentos de Ervas Chinesas , Via de Sinalização Wnt , beta Catenina , Animais , Artrite Reumatoide/tratamento farmacológico , Artrite Reumatoide/metabolismo , Artrite Reumatoide/genética , Medicamentos de Ervas Chinesas/administração & dosagem , Medicamentos de Ervas Chinesas/farmacologia , Ratos , Masculino , Via de Sinalização Wnt/efeitos dos fármacos , beta Catenina/metabolismo , beta Catenina/genética , Metiltransferases/genética , Metiltransferases/metabolismo , Humanos , Ratos Sprague-Dawley , Sinoviócitos/efeitos dos fármacos , Sinoviócitos/metabolismo , Proteínas Proto-OncogênicasRESUMO
BACKGROUND: Based on susceptibility-weighted imaging (SWI) visibility, deep medullary vein (DMV) scores are related to white matter damage (WMD) in patients with cerebral small vessel disease (CSVD). However, whether mechanisms are associated with DMV changes is unclear. We examined extracellular fluid (ECF) roles in white matter associations between DMV scores and white matter integrity (WMI) in patients with CSVD. METHODS: We examined magnetic resonance imaging (MRI) and clinical data from 140 patients with CSVD. DMV scores (0-18) were assigned on SWI according to DMV anatomic regions and signal continuity/visibility. WMI and ECF volumes were evaluated using free water (FW) and fractional anisotropy (FA) values by diffusion tensor imaging (DTI). RESULTS: DMV scores were independently associated with FA after adjusting for vascular risk factors, age, white matter hyperintensity (WMH) volume, and CSVD burden [ß (95% confidence interval (CI)): -0.219 (-0.375, -0.061), p = 0.006]. We also observed a significant indirect effect of DMV scores on FA in white matter (mediated by FW in white matter) after controlling for age, vascular risk factors, WMH volume, and CSVD burden. CONCLUSIONS: DMV scores were independently related to WMI and mediated by ECF in the white matter of patients with CSVD.
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Doenças de Pequenos Vasos Cerebrais , Substância Branca , Humanos , Substância Branca/diagnóstico por imagem , Substância Branca/patologia , Imagem de Tensor de Difusão , Imageamento por Ressonância Magnética/métodos , Doenças de Pequenos Vasos Cerebrais/diagnóstico por imagem , Fatores de RiscoRESUMO
The correlated spinful Haldane model exhibits rich topological phases consisting of chiral topological superfluids (TSFs) and topological spin density waves. However, most of previous studies mainly focus on the case with the fixed hopping phase or at zero temperature. In this paper, we study the attractive spinful Haldane model with arbitrary phase at finite temperature. The chiral TSFs with Chern numberC = 2 and 4 emerge driven by the phase and temperature. In particular, the temperature can drive aC = 2 topological superfluid from a trivial normal insulator phase at an appropriate interaction. The bulk topology of all TSFs is uncovered by the Wilson loop method, and confirmed by the responses of edge dislocations.
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The vigorous development of marine fisheries carbon sinks (MFCS) has become a momentous pathway to mitigate global warming and effectively cope with the climate crisis. Deservedly, based on clarifying mechanism of carbon sequestration, this paper designs a research paradigm for predicting and evaluating the potential of MFCS. Specifically, a novel nonlinear grey Bernoulli model, namely MFCSNGBM(1,1), is proposed by innovatively mining the original data law through adaptive cumulative series and introducing the compound Simpson formula to optimize background values. More precisely, we utilize a heuristic Grey Wolf Optimization algorithm to find the best power index, which enhances the adaptability. To prove usefulness and robustness of MFCSNGBM(1,1) model, yields of seven common shellfishes (oyster, clam, mussel, scallop, razor clam, bloody clam, and snail) and three main algae (kelp, pinnatifid undaria, and laver) are predicted and compared with six competing models. Based on prediction results, new model has the most accurate predictions, with all prediction errors being <10 %, and thus can achieve effective prediction of shellfish and algae production from 2022 to 2025. Further, the capacity and potential of MFCS in China are scientifically evaluated using a removable carbon sink model, considering various yield levels and biological parameters of shellfish and algae. The assessment results show that during the sample period, China's marine fisheries carbon sinks steadily increased with an annual growth rate of 57,000 tons. From 2022 to 2025, with support of policy of MFCS and improvement of disaster prevention and mitigation capacity, the potential of MFCS will be further released. The growth rate of MFCS will be increased to 94,000 tons per year, and its overall scale is expected to reach 2,198,245 tons by 2025, equivalent to fixing 8.06 million tons of CO2. The carbon sink's economic value is significantly estimated to be over 400 billion yuan.
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Sequestro de Carbono , Algas Comestíveis , Pesqueiros , Porphyra , Aquecimento Global , China , Dióxido de Carbono/análise , Carbono/análiseRESUMO
BACKGROUND: Sorafenib (Sora), a multi-target tyrosine kinase inhibitor, is widely recognized as a standard chemotherapy treatment for advanced hepatocellular carcinoma (HCC). However, drug resistance mechanisms hinder its anticancer efficacy. Derived from Withania somnifera, Withaferin A (WA) exhibits remarkable anti-tumor properties as a natural bioactive compound. This study aimed to examine the mechanisms that underlie the impacts of Sora and WA co-treatment on HCC. METHODS: Cell proliferation was evaluated through colony formation and MTT assays. Flow cytometry was employed to determine cellular apoptosis and reactive oxygen species (ROS) levels. The evaluation of apoptosis-related protein levels, DNA damage, and endoplasmic reticulum stress was conducte utilizing IHC staining and western blotting. Moreover, the caspase inhibitor Z-VAD-FMK, ATF4 siRNA, ROS scavenger N-acetyl cysteine (NAC), and TrxR1 shRNA were used to elucidate the underlying signaling pathways. To validate the antitumor effects of Sora/WA co-treatment, in vivo experiments were ultimately executed using Huh7 xenografts. RESULTS: Sora/WA co-treatment demonstrated significant synergistic antitumor impacts both in vivo and in vitro. Mechanistically, the enhanced antitumor impact of Sora by WA was achieved through the inhibition of TrxR1 activity, resulting in ROS accumulation. Moreover, ROS generation induced the activation of DNA damage and endoplasmic reticulum (ER) stress pathways, eventually triggering cellular apoptosis. Pre-treatment with the antioxidant NAC significantly inhibited ROS generation, ER stress, DNA damage, and apoptosis induced by Sora/WA co-treatment. Additionally, the inhibition of ATF4 by small interfering RNA (siRNA) attenuated Sora/WA co-treatment-induced apoptosis. In vivo, Sora/WA co-treatment significantly suppressed tumor growth in HCC xenograft models and decreased TrxR1 activity in tumor tissues. CONCLUSION: Our study suggests that WA synergistically enhances the antitumor effect of Sora, offering promising implications for evolving treatment approaches for HCC.
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Apoptose , Carcinoma Hepatocelular , Dano ao DNA , Sinergismo Farmacológico , Estresse do Retículo Endoplasmático , Neoplasias Hepáticas , Camundongos Nus , Espécies Reativas de Oxigênio , Sorafenibe , Vitanolídeos , Vitanolídeos/farmacologia , Estresse do Retículo Endoplasmático/efeitos dos fármacos , Humanos , Carcinoma Hepatocelular/tratamento farmacológico , Espécies Reativas de Oxigênio/metabolismo , Neoplasias Hepáticas/tratamento farmacológico , Animais , Dano ao DNA/efeitos dos fármacos , Sorafenibe/farmacologia , Linhagem Celular Tumoral , Apoptose/efeitos dos fármacos , Tiorredoxina Redutase 1/metabolismo , Camundongos Endogâmicos BALB C , Proliferação de Células/efeitos dos fármacos , Camundongos , Ensaios Antitumorais Modelo de Xenoenxerto , Fator 4 Ativador da Transcrição/metabolismoRESUMO
Soil salinization is a global constraint that significantly hampers agricultural production, with cotton being an important cash crop that is not immune to its detrimental effects. The rhizosphere microbiome plays a critical role in plant health and growth, which assists plants in resisting adverse abiotic stresses including soil salinization. This study explores the impact of soil salinization on cotton, including its effects on growth, yield, soil physical and chemical properties, as well as soil bacterial community structures. The results of ß-diversity analysis showed that there were significant differences in bacterial communities in saline-alkali soil at different growth stages of cotton. Besides, the more severity of soil salinization, the more abundance of Proteobacteria, Bacteroidota enriched in rhizosphere bacterial composition where the abundance of Acidobacteriota exhibited the opposite trend. And the co-occurrence network analysis showed that soil salinization affected the complexity of soil bacterial co-occurrence network. These findings provide valuable insights into the mechanisms by which soil salinization affects soil microorganisms in cotton rhizosphere soil and offer guidance for improving soil salinization using beneficial microorganisms.
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Background: Changes in intestinal flora and intestinal barrier in patients with preclinical and diagnosed rheumatoid arthritis (RA) suggest that intestinal flora and intestinal barrier play an important role in the induction and persistence of RA. Huangqin Qingre Chubi Capsule (HQC) is a clinically effective herbal formula for the treatment of RA, but its therapeutic mechanism has not been fully clarified. Materials and methods: In this study, real-time qPCR (RT-qPCR), 16SrRNA sequencing, Western blot (WB), immunofluorescence and other methods were used to investigate whether HQC inhibited RA. Results: Based on research in collages-induced arthritis (CIA) model in mice, human colon cancer cell line (Caco-2), and fibroblast-like synoviocytes (FLS) from RA patients, we found that intestinal flora was disturbed in CIA model group, intestinal barrier was damaged, and lipolyaccharide (LPS) level was increased, and HQC could regulate intestinal flora and intestinal barrier and reduce LPS translocation into blood. Antibiotic depletion weakened the anti-RA effect of HQC, and HQC fecal microbiota transplantation alleviated RA pathology. In addition, LPS increased the expression of RA pathologic factors MMP3, Fibronectin and inflammatory factors IL-6, TNF-α, IL-1ß and IL-8, indicating that elevated peripheral blood level of LPS was related to RA pathology. Conclusion: The dysregulation of intestinal flora and the disruption of intestinal barrier are significant factors in the development of RA. HQC improves RA by regulating intestinal flora, intestinal barrier and inhibiting LPS translocation into blood. The study unveiles RA's new pathogenesis and laid a scientific groundwork for advancing HQC therapy for RA.
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AIM OF THE STUDY: Research on the mechanism of Huangqin Qingre Chubi Capsules (HQC) in improving rheumatoid arthritis accompanied depression (RA-dep) model rats. METHODS: We employed real-time qPCR (RT-qPCR), western blotting (WB), confocal microscopy, bioinformatics, and other methods to investigate the anti-RA-dep effects of HQC and its underlying mechanisms. RESULTS: HQC alleviated the pathological indexes of inflammation and depression in RA-dep model rats, decreased the levels of tumor necrosis factor (TNF)-α, interleukin (IL)-1ß and IL-6, increased the levels of norepinephrine(NE) and serotonin(5-HT), and improved the injury of hippocampus. The analysis of network pharmacology suggests that HQC may target the Wnt/ß-catenin pathway in the treatment of RA-dep. Furthermore, molecular dynamics simulations revealed a strong affinity between HQC and the Wnt1 molecule. RT-qPCR and Western Blot (WB) experiments confirmed the critical role of the Wnt1/ß-catenin signaling pathway in the treatment of RA-dep model rats with HQC. In vitro, the HQC drug-containing serum (HQC-serum) activates the Wnt1/ß-catenin signaling pathway in hippocampal cells and, in conjunction with Wnt1, ameliorates RA-dep. In summary, HQC exerts its anti-inflammatory and antidepressant effects in the treatment of RA-dep by binding to Wnt1 and regulating the Wnt1/ß-catenin signaling pathway. CONCLUSIONS: HQC improved the inflammatory reaction and depression-like behavior of RA-dep model rats by activating Wnt1/ß-catenin signal pathway. This study revealed a new pathogenesis of RA-dep and contributes to the clinical promotion of HQC in the treatment of RA-dep.
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Artrite Reumatoide , Depressão , Medicamentos de Ervas Chinesas , Hipocampo , Via de Sinalização Wnt , Proteína Wnt1 , Animais , Artrite Reumatoide/tratamento farmacológico , Medicamentos de Ervas Chinesas/farmacologia , Medicamentos de Ervas Chinesas/uso terapêutico , Via de Sinalização Wnt/efeitos dos fármacos , Depressão/tratamento farmacológico , Depressão/metabolismo , Masculino , Proteína Wnt1/metabolismo , Proteína Wnt1/genética , Ratos , Hipocampo/metabolismo , Hipocampo/efeitos dos fármacos , Hipocampo/patologia , beta Catenina/metabolismo , Modelos Animais de Doenças , Ratos Sprague-Dawley , Humanos , Citocinas/metabolismo , Anti-Inflamatórios/uso terapêutico , Anti-Inflamatórios/farmacologia , Antidepressivos/farmacologia , Antidepressivos/uso terapêuticoRESUMO
Our previous study found that Cullin 4B (CUL4B) inhibited rheumatoid arthritis (RA) pathology through glycogen synthase kinase-3beta (GSK3ß)/canonical Wnt signalling pathway. In this work, pre-experiment and bioinformatics analysis suggested that circ_0011058 may lead to the up-regulation of CUL4B expression by inhibiting miR-335-5p. Therefore, we studied whether circ_0011058 can promote the expression of CUL4B through sponging the miR-335-5p and further promote the pathological development of RA. Bioinformatics prediction, real-time quantitative PCR (RT-qPCR), western blot (WB), double luciferase reporter gene and other relevant methods were used to study the inhibition of circ_0011058 on RA pathology and its molecular mechanism. Results showed that the expression of circ_0011058 was significantly increased in adjuvant arthritis (AA) rats and RA fibroblast-like synoviocytes (FLS). The knockout of circ_0011058 inhibited the proliferation of AA FLS and RA FLS, decreased the levels of interleukin-1 beta (IL-1ß), interleukin 6 (IL-6), interleukin 8 (IL-8), and inhibited the expression of matrix metalloproteinase 3 (MMP3), fibronectin, which showed that circ_0011058 had a strong role in promoting RA pathology. Furthermore, miR-335-5p expression was reduced in AA rats and RA FLS. The highly expressed circ_0011058 directly sponged the miR-335-5p, which led to the increase of CUL4B expression and promoted the activation of the GSK3ß/canonical signalling pathway. Finally, we confirmed that miR-335-5p mediated the roles of circ_0011058 in promoting RA pathological development, which showed that the circ_0011058/miR-335-5p/CUL4B signal axis was involved in RA pathology. This work was of great significance for clarifying the roles of circ_0011058 in RA pathology, and further work was needed to establish whether circ_0011058 was a potential therapeutic target or diagnostic marker for RA.
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Artrite Experimental , Artrite Reumatoide , Proteínas Culina , MicroRNAs , RNA Circular , Animais , Ratos , Artrite Reumatoide/genética , Biologia Computacional , Fibroblastos , Glicogênio Sintase Quinase 3 beta/genética , Interleucina-6 , RNA Circular/genética , RNA Circular/metabolismo , Humanos , MicroRNAs/genética , MicroRNAs/metabolismoRESUMO
BACKGROUND: Wilforine (WFR) is a monomeric compound of the anti-RA plant Tripterygium wilfordii Hook. f. (TwHF). Whether WFR has anti-RA effect, its molecular mechanism has not been elucidated. AIM OF THE STUDY: Our study aims to clarify how WFR inhibits fibroblast-like synovial cells (FLS) activation and improves RA through Wnt11 action on the Wnt11/ß-catenin signaling pathway. METHODS: The therapeutic effect of WFR on collagen-induced arthritis (CIA) rats was evaluated using methods such as rat arthritis score. The inhibitory effects and signaling pathways of WFR on the proliferation and inflammatory response of CIA FLS and RA FLS were studied using ELISA, CCK-8, RT-qPCR, Western blot, and immunofluorescence methods. RESULTS: WFR could effectively alleviate the arthritis symptoms of CIA rats; reduce the levels of IL-6, IL-1ß, and TNF-α in the peripheral blood of CIA rats; and inhibit the expression of MMP3 and fibronectin. The data showed that WFR has a significant inhibitory effect on FLS proliferation. Furthermore, WFR inhibited the activation of Wnt/ß-catenin signaling pathway and decreased the expression of Wnt11, ß-catenin, CCND1, GSK-3ß, and c-Myc, while the effects of WFR were reversed after overexpression of Wnt11. CONCLUSIONS: WFR improves RA by inhibiting the Wnt11/ß-catenin signaling pathway, and Wnt11 is the direct target of WFR. This study provides a new molecular mechanism for WFR to improve RA and contributes to the clinical promotion of WFR.