Ferroptosis of chondrocytes is a significant contributor to osteoarthritis (OA), for which there is still a lack of safe and effective therapeutic drugs targeting ferroptosis. Here, we screen for anti-ferroptotic drugs in Food and Drug Administration (FDA)-approved drug library via a high-throughput manner in chondrocytes. We identified a group of FDA-approved anti-ferroptotic drugs, among which vitamin K showed the most powerful protective effect. Further study demonstrated that vitamin K effectively inhibited ferroptosis and alleviated the extracellular matrix (ECM) degradation in chondrocytes. Intra-articular injection of vitamin K inhibited ferroptosis and alleviated OA phenotype in destabilization of the medial meniscus (DMM) mouse model. Mechanistically, transcriptome sequencing and knockdown experiments revealed that the anti-ferroptotic effects of vitamin K depended on growth arrest-specific 6 (Gas6). Furthermore, exogenous expression of Gas6 was found to inhibit ferroptosis through the AXL receptor tyrosine kinase (AXL)/phosphatidylinositol 3-kinase (PI3K)/AKT serine/threonine kinase (AKT) axis. Together, we demonstrate that vitamin K inhibits ferroptosis and alleviates OA progression via enhancing Gas6 expression and its downstream pathway of AXL/PI3K/AKT axis, indicating vitamin K as well as Gas6 to serve as a potential therapeutic target for OA and other ferroptosis-related diseases.

Objective:To identify potential therapeutic targets of chronic sinusitis with nasal polyps (CRSwNP) through proteomics screening of and verify its effectiveness experimentally.Methods:The nasal tissue samples were collected from patients undergoing surgical treatment in the Department of Otorhinolaryngology, Head and Neck Surgery in Yuhuangding Hospital of Yantai from June 2010 to December 2021, including 69 patients with CRSwNP and 39 patients in the control group. Tissue samples were analyzed by liquid chromatography-tandem mass spectrometry (LC-MS/MS) in data-independent acquisition (DIA) mode to find differentially expressed proteins. Bioinformatics tools were employed to analyze the functions of differentially expressed proteins. The expression of hematopoietic cell kinase (HCK) in nasal tissues of patients with CRSwNP was further confirmed by qPCR and western blot. The mouse model of CRSwNP was established and treated with HCK inhibitor. The levels of inflammatory factors IgE, IL-4 and IL-5 in serum of CRSwNP mice, both treated and untreated with HCK inhibitors, were detected by enzyme-linked immunosorbent assay (ELISA) across different experimental groups. The experimental data were analyzed by Graphpad Prism 9 software.Results:DIA analysis identified 1 850 differential proteins, including 760 up-regulated proteins and 1 090 down-regulated proteins. Weighted correlation network analysis (WGCNA) correlation analysis of phenotypic data such as cell count and CT score with the results of genomics indemnified 575 proteins of MEBrown module which intersected with 35 kinases further screened from 1 850 differential proteins, yielding eight protein kinases: HCK, SYK, PDK2, FGR, PRKCB, ROR1, CAMK1 and GRK6. qPCR showed that the expression of HCK in CRSwNP was significantly higher than that in the control group ( P<0.05). Further experiments in mice confirmed that the secretion of IgE, IL-4 and IL-5 in the serum of CRSwNP group was significantly higher than the control group (all P<0.05), indicating successful model establishment. The intervention of HCK significantly decreased the secretion of IgE, IL-4 and IL-5 in serum of mice (all P<0.05). Conclusion:The HCK inhibitor can reduce the inflammatory index of mice with CRSwNP, and HCK is a potential therapeutic target of CRSwNP.

Pathological mechanism of ulcerative colitis(UC)is not fully clear,which may be the result of Th17/Treg immune imbalance and the interaction of multiple complex factors.Numerous studies have found that classical TCM prescriptions,experienced formulas and TCM active components could regulate Th17/Treg balance by intervening in cytokines,transcription factors,and signaling pathways,restore intestinal mucosal immune function,suppress intestinal mucosal inflammatory response,and repair intestinal mucosal barrier damage.Based on the research status of UC,Th17/Treg balance and TCM treatment,this article reviewed the relationship between Th17/Treg balance and UC,and explained the key role of Th17/Treg balance in the occurrence and development of UC.At the same time,the Chinese materia medica targeting to regulate the balance of Th17/Treg in the treatment of UC in recent years was summarized,in order to provide reference for the treatment of UC.

OBJECTIVE To study the impr ovement effects of Dianxianqing granule on blood-brain barrier （BBB）injury in Alzheimer’s disease （AD）model mice by regulating NLR family pyrin domain containing 3（NLRP3）inflammasome signaling pathway. METHODS Totally 125 mice were randomly divided into sham operation group （n＝25）and modeling group （n＝100） by body weight. AD model was induced by intracerebroventricular injection of β-amyloid 25-35 in model group. Sham operation group was given normal saline with same method. The 100 model mice were randomly divided into model group ，Donepezil hydrochloride tablets group （positive control 1，1.3 mg/kg，i.g.），MCC950 group [positive control 2（selective NLRP 3 inhibitor），10 mg/kg，i.p.] and Dianxianqing granule group （12.48 g/kg by crude drug ，i.g.）by body weight ，with 25 mice in each group. Second day after modeling ，administration groups were given relevant medicine ，once a day ，for consecutive 21 d. Sham operation group and model group were given intragastric administration of water and intraperitoneal injection of normal saline. At last administration，the learning and memory ability was determined by Y maze test ，and blood-brain barrier permeability was measured by Evans blue leakage assay. The expressions of NLRP 3，anti-ionized calcium-binding adapter molecule 1（IBA-1），nuclear factor kappa B （NF-κB）p65，p53 upregulated modulator of apoptosis （PUMA），occludin（ocln），zonula occluden- 1（ZO-1）and claudin-5 （cldn5） in cerebral tissue were determined. RESULTS Compared with model group ， spontaneous alternate response rate ，protein expressions of ocln ，cldn5 lnzyxyqy2003@163.com and ZO- 1 in cerebral tissue were increased significantly in administration groups （P＜0.05 or P＜0.01）；Evans blue E-mail：jiadg2003@126.com content and protein expressions of NLRP 3，IBA-1，PUMA and NF-κB p65 in cerebral tissue were decreased significantly （P＜0.05 or P＜0.01）. CONCLUSIONS Dianxianqing granule can improve BBB injury of AD model m ice by inhibiting NLRP 3 inflammasome signaling pathway.

OBJECTIVES: Excessive production of AGEs in diabetic patients will affect the normal function of osteoblasts, and this process may be related to autophagy of osteoblasts. This study aims to explore the effect of advanced glycation end products (AGEs) on autophagic activity during osteogenic differentiation in rat bone marrow mesenchymal stem cells (BMSCs). METHODS: BMSCs were isolated and cultured in vitro, treated with different concentrations (0, 50, 100, 200, and 400 mg/L) of AGEs for different time (3, 6, 12, 24, 48, and 72 h). The proliferation activity was detected by CCK-8 method. The mRNA and protein expression levels of Beclin1 and LC3 in cells were detected by real-time PCR and Western blotting, respectively.The autophagic vacuoles were observed under the transmission electron microscope. The cells were treated with autophagy promoter rapamycin or autophagy inhibitor 3MA. After 7 days of osteogenic induction, we performed alkaline phosphatase (ALP) staining and real-time PCR to detect the mRNA expression levels of osteogenesis-related genes. RESULTS: In the low-concentration groups, the proliferation activity in BMSCs was increased ( CONCLUSIONS Low concentration of AGEs can enhance the proliferative activity of BMSCs and promote osteogenic differentiation by accelerating autophagy. High concentration of AGEs can suppress the proliferation of BMSCs and inhibit osteogenic differentiation by reducing autophagy.
Animals ; Autophagy ; Bone Marrow Cells ; Cell Differentiation ; Cells, Cultured ; Glycation End Products, Advanced/pharmacology* ; Humans ; Osteoblasts ; Osteogenesis ; Rats ; Rats, Sprague-Dawley

OBJECTIVE：To study the improvement effect and possible mechanism of Leontopodium leontopodioides combined with Astragalus membranaceus on the renal function of mesangial proliferative glomerulonephritis （MsPGN） model rats. METHODS：Totally 85 rats were randomly divided into sham operation group （n＝10）and modeling group （n＝75）. Sham operation group underwent sham operation ，and MsPGN model was induced by immunological method [Freund ’s adjuvant+BSA + lipopolysaccharide（LPS）] in modeling group. After successfully modeling ，70 rats were randomly divided into model group ，L. leontopodioides+A. membranaceus high-dose，medium-dose and low-dose groups （4.05，2.03，1.02 g/kg，by total crude drug ），L. leontopodioides alone group （2.70 g/kg，by crude drug ），Tripterygium glycosides tablet group （positive control 1，0.02 g/kg）， Lotensin tablet group （positive control 2，0.02 g/kg），with 10 rats in each group. Sham operation group and model group were given constant volume of normal saline intragastrically ； administration groups were given relevant drug solution intrasgastrcially at a volume of 15 mL/kg，once a day ，for consecutive 5 weeks. At last administration ，24 h urinary lnzyxyqy2003@163.com protein，urine creatinine and serum creatinine were determined in rats. The right kidney was weighed ，and HE staining was used to observe the pathomorpholog y changes of renal tissue. Immunohistochemistry was used to detect the protein expression of NF-κB p65 in renal tissue. Western blotting assay was used to determine the protein expressions of NF-κB p65，IκBα，ERK，p-ERK and p 38 MAPK in renal tissue. RESULTS ：Compared with sham operation group ，right kidney weight ，24 h urine protein and serum creatinine levels ，protein expressions of NF-κB p65， p-ERK and p 38 MAPK in renal tissue were increased significantly in model group （P＜0.05 or P＜0.01）；the level of urine creatinine and protein expression of IκBα in renal tissue were decreased significantly（P＜0.05 or P＜0.01）；there were obvious glomerular hypertrophy ，diffuse increase of mesangial cells ，necrosis of renal tubules and other pathomorphological changes in renal tissue. Compared with model group ，right kidney weight and serum creatinine level were decreased significantly in L. leontopodioides alone group （P＜0.05），while urine creatinine level was increased significantly （P＜0.05），but there was no statistical significance in the level of 24 h urine protein （P＞0.05）；the right kidney weight ，24 h urine protein ，serum creatinine level and protein expression levels of NF-κB p65，p-ERK and p38 MAPK in renal tissue were decreased significantly in L. leontopodioides+A. membranaceus high-dose group （P＜0.05），while the urine creatinine level and protein expression level of IκBα in renal tissue were increased significantly （P＜0.05 or P＜0.01）；there was no statistical significance in above indexes in L. leontopodioides+A. membranaceus medium-dose，low-dose groups （P＞0.05）；pathological changes of renal tissue were improved to different extents in administration groups ，especially in L. leontopodioides +A. membranaceus high-dose group. CONCLUSIONS ： High dose of L. leontopodioides +A. membranaceus can improve renal function of MsPGN model rats by inhibiting MAPK/NF-κB signal pathway.

OBJECTIVES: To explore the difference in odontoblast differentiation capacity between stem cells from human exfoliated deciduous teeth (SHED) and dental pulp stem cells (DPSCs), and to examine the expression level of ephrinB1 in odontoblast differentiation of these stem cells. METHODS: The stems cells were divided into a SHED group and a DPSCs group. After odontoblast differentiation induction, the above 2 groups were also randomly divided into a 3 d group and a 7 d group, respectively.The calcium deposition was detected by alkaline phosphatase (ALP) staining and alizarin red staining.The mRNA and protein expressions of ephrinB1, dentin matrix protein-1 (DMP-1) and dentin sialophosphoprotein (DSPP) were detected by real-time PCR and Western blotting. RESULTS: ALP staining and alizarin red staining showed that there was stronger mineralization capacity in the SHED group than that in the DPSCs group. The relative mRNA and protein expressions of DMP-1, DSPP, and ephrinB1 in the SHED group were higher than those in the DPSCs group except for the protein expression of DMP-1 in the SHED 3 d group (all <0.05). CONCLUSIONS SHED has stronger odontoblast differentiation capacity than DPSCs. In addition, ephrinB1 may be involved in the processes of odontoblast differentiation in the SHED and DPSCs.
Cell Differentiation ; Cell Proliferation ; Cells, Cultured ; Dental Pulp ; Humans ; Odontoblasts ; Osteogenesis ; Stem Cells ; Tooth, Deciduous

OBJECTIVE: To explore the effect of advanced glycation end products (AGEs) on osteoclasts at different stages of differentiation. METHODS: Raw264.7 cells cultured were induced for osteoclastogenesis using RANKL, and the stages of differentiation of the osteoclasts were determined with TRAP staining. The cells were then randomly divided into control group, early-stage AGEs intervention group and late-stage AGEs intervention group. The viability of the cells after AGEs treatment was assessed using CCK-8 method. The cells were examined after the induction for osteoclastogenesis using TRAP staining, and the expression levels of RANK, NFATC-1, TRAF-6, TRAP and CTSK mRNAs were tested with RT-PCR; the expressions of CTSK and RANK proteins were detected using Western boltting. RESULTS: We defined the initial 3 days of induction as the early stage of differentiation and the time beyond 3 days as the late stage of differentiation of Raw264.7 cells. Intervention with AGEs at 100 mg/L produced no significant effects on the viability of the cells, but AGEs suppressed the cell proliferation at a concentration exceeding 100 mg/L. The number of osteolasts in the early- and late-stage intervention groups was greater than that in the control group, but the cell count differed significantly only between the early-stage intervention group and control group ( < 0.05). The gene expressions of RANK, NFATC-1, TRAF-6, TRAP and CTSK all increased after the application of AGEs in both the early and late stages of differentiation, but the changes were significant only in the early-stage intervention group ( < 0.05). The changes in CTSK and RANK protein expressions were consistent with their mRNA expressions. CONCLUSIONS AGEs can affect the differentiation of osteoclasts differently when applied at different stages, and intervention with AGEs at the early stage produces stronger effect to promote osteoclast differentiation than its application at a late stage.
Animals ; Bone Resorption ; Cell Differentiation ; Mice ; Osteoclasts ; RANK Ligand ; RAW 264.7 Cells ; Receptor Activator of Nuclear Factor-kappa B

In order to investigate the distribution of Yersinia enterocolitica in Citellus dauricus plague focuses in Inner Mongolia,three different ecological environ/ments were chosen as the sampling area.Feces,tongue roots throat swabs,and intestinal contents of rodent,livestock,and poultry were separately collected,and different Y.enterocolitica strains were isolated,and identified.PCR analysis was conducted to detect the toxicity genes of Y.enterocolitica.Statiscal analysis was performed by chisquare test.Of the 3 260 samples,65 Y.enterocolitica strains were isolated and the overall detection rate was 1.99％.To include O ∶ 3/3,O ∶ 5/1A,O ∶ 4/4 serum biological type,the pathogenic strain of serotype O ∶ 3 and biological typt 3 carryinq toxicity genes ail,ystA,VirF yadA and rfbc was isolated from pigs in Citellus dauricus plague focuses,Inner Mongolia are the major carrier of pathogenic Y.enterocolitica distributed in three different ecological environment,and distributed mainly in agricultural area.