1.Exploring on Processing Mechanism of Enhanced "Invigorating Spleen and Stopping Diarrhea" Effect of Soil-fried Atractylodis Macrocephalae Rhizoma Based on "Microscopic Characterization, Chemical Analysis and Pharmacodynamic Evaluation" Trinity
Guoshun SHAN ; Yuyan XIAO ; Chu YUAN ; Xiuai CHEN ; Qimiao ZHAO ; Xiang LIU ; Hao WU ; Ke ZHANG ; Siqi LIU ; Yongduo YU
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(8):182-193
ObjectiveTo analyze the processing mechanism underlying the enhanced effect of invigorating spleen and stopping diarrhea of soil-fried Atractylodis Macrocephalae Rhizoma(AMR) by analyzing the changes of microstructure, chemical composition and anti-ulcerative colitis(UC) activity before and after soil stir-frying. MethodsThe microstructure and elemental composition of AMR before and after soil stir-frying were analyzed by scanning electron microscopy-energy dispersive spectroscopy(SEM-EDS), to investigate the differences in microstructure and the underlying causes. Ultra-high performance liquid chromatography-quadrupole-time-of-flight mass spectrometry(UPLC-Q-TOF-MS) coupled with UNIFI 1.9.2 natural product analysis platform were used to analyze and identify the chemical constituents in raw and soil-fried products, and multivariate statistical methods including principal component analysis(PCA) and orthogonal partial least squares-discriminant analysis(OPLS-DA) were used to explore the differences and sources of chemical constituents between them. A dextran sulfate sodium(DSS)-induced UC mouse model was established. The method of disease activity index(DAI) was used to evaluate the severity of intestinal inflammation. Hematoxylin-eosin(HE) staining was used to observe the pathological changes of colon tissue, enzyme-linked immunosorbent assay(ELISA) was used to detect the levels of inflammatory factors, Real-time quantitative polymerase chain reaction(Real-time PCR) and Western blot were used to analyze the expressions of key genes and proteins involved in the intestinal mucosal barrier. The 16S rRNA sequencing was used to evaluate the diversity of intestinal flora, headspace gas chromatography-mass spectrometry(HS-GC-MS) was used to explore the levels of short-chain fatty acids(SCFAs) in feces. Base on the above findings, this paper investigated the effects of raw and soil-fried AMR on the biological, chemical, mechanical and immune barriers of model animals, and the differences in pharmacological effects and underlying mechanisms from the perspective of regulating the intestinal mucosal barrier in UC mice. ResultsSEM observation revealed numerous hearth soil particles on the surface of soil-fried AMR, accompanied by bubble-like bulges. At the same time, there were many cracks and folds on the surface of the hearth soil. EDS analysis revealed that the contents of Si, Al, Mg and Ca in soil-fried AMR were significantly higher than those of raw products, and these elements constituted the primary components of hearth soil. UPLC-Q-TOF-MS combined with database comparison was used to identify the chemical constituents of raw and soil-fried AMR. In positive ion mode, a total of 132 components were identified, primarily comprising three categories of terpenoids, polyphenols and amino acids. In negative ion mode, a total of 40 components were identified, primarily polyphenolic and glycoside compounds. Among them, the contents of sesquiterpenes and polyphenolic acids were changed significantly before and after processing. Soil-fried AMR could reduce the DAI score of UC mice, alleviate the shortening of colon length, reduce the levels of pro-inflammatory factors such as interleukin(IL)-17, IL-18, γ-interferon(IFN-γ) and tumor necrosis factor(TNF)-α in serum, increase the levels of anti-inflammatory factors such as secretory immunoglobulin A(sIgA), IL-10, IL-4 and transforming growth factor-β(TGF-β) in serum, increase the expressions of key genes and proteins of intestinal mucosal barrier such as tight junction protein-1(ZO-1), Occludin, Claudin-1 and mucin 2(MUC2) in colonic mucosa, and improve the disorders of intestinal flora diversity and the levels of SCFAs(P<0.05, P<0.01). The raw and stir-fried products of AMR also exhibited the aforementioned effects, but they were weaker than the soil-fried products. Additionally, the auxiliary material hearth soil also had a certain pharmacodynamic effect. ConclusionSoil-fried AMR can enhance the protective effect on intestinal mucosal barrier in UC mice. These changes or heating-induced alterations in the microscopic structure and chemical composition of AMR may be attributed to the dual effects of adsorption of hearth soil.
2.Exploring on Processing Mechanism of Enhanced "Invigorating Spleen and Stopping Diarrhea" Effect of Soil-fried Atractylodis Macrocephalae Rhizoma Based on "Microscopic Characterization, Chemical Analysis and Pharmacodynamic Evaluation" Trinity
Guoshun SHAN ; Yuyan XIAO ; Chu YUAN ; Xiuai CHEN ; Qimiao ZHAO ; Xiang LIU ; Hao WU ; Ke ZHANG ; Siqi LIU ; Yongduo YU
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(8):182-193
ObjectiveTo analyze the processing mechanism underlying the enhanced effect of invigorating spleen and stopping diarrhea of soil-fried Atractylodis Macrocephalae Rhizoma(AMR) by analyzing the changes of microstructure, chemical composition and anti-ulcerative colitis(UC) activity before and after soil stir-frying. MethodsThe microstructure and elemental composition of AMR before and after soil stir-frying were analyzed by scanning electron microscopy-energy dispersive spectroscopy(SEM-EDS), to investigate the differences in microstructure and the underlying causes. Ultra-high performance liquid chromatography-quadrupole-time-of-flight mass spectrometry(UPLC-Q-TOF-MS) coupled with UNIFI 1.9.2 natural product analysis platform were used to analyze and identify the chemical constituents in raw and soil-fried products, and multivariate statistical methods including principal component analysis(PCA) and orthogonal partial least squares-discriminant analysis(OPLS-DA) were used to explore the differences and sources of chemical constituents between them. A dextran sulfate sodium(DSS)-induced UC mouse model was established. The method of disease activity index(DAI) was used to evaluate the severity of intestinal inflammation. Hematoxylin-eosin(HE) staining was used to observe the pathological changes of colon tissue, enzyme-linked immunosorbent assay(ELISA) was used to detect the levels of inflammatory factors, Real-time quantitative polymerase chain reaction(Real-time PCR) and Western blot were used to analyze the expressions of key genes and proteins involved in the intestinal mucosal barrier. The 16S rRNA sequencing was used to evaluate the diversity of intestinal flora, headspace gas chromatography-mass spectrometry(HS-GC-MS) was used to explore the levels of short-chain fatty acids(SCFAs) in feces. Base on the above findings, this paper investigated the effects of raw and soil-fried AMR on the biological, chemical, mechanical and immune barriers of model animals, and the differences in pharmacological effects and underlying mechanisms from the perspective of regulating the intestinal mucosal barrier in UC mice. ResultsSEM observation revealed numerous hearth soil particles on the surface of soil-fried AMR, accompanied by bubble-like bulges. At the same time, there were many cracks and folds on the surface of the hearth soil. EDS analysis revealed that the contents of Si, Al, Mg and Ca in soil-fried AMR were significantly higher than those of raw products, and these elements constituted the primary components of hearth soil. UPLC-Q-TOF-MS combined with database comparison was used to identify the chemical constituents of raw and soil-fried AMR. In positive ion mode, a total of 132 components were identified, primarily comprising three categories of terpenoids, polyphenols and amino acids. In negative ion mode, a total of 40 components were identified, primarily polyphenolic and glycoside compounds. Among them, the contents of sesquiterpenes and polyphenolic acids were changed significantly before and after processing. Soil-fried AMR could reduce the DAI score of UC mice, alleviate the shortening of colon length, reduce the levels of pro-inflammatory factors such as interleukin(IL)-17, IL-18, γ-interferon(IFN-γ) and tumor necrosis factor(TNF)-α in serum, increase the levels of anti-inflammatory factors such as secretory immunoglobulin A(sIgA), IL-10, IL-4 and transforming growth factor-β(TGF-β) in serum, increase the expressions of key genes and proteins of intestinal mucosal barrier such as tight junction protein-1(ZO-1), Occludin, Claudin-1 and mucin 2(MUC2) in colonic mucosa, and improve the disorders of intestinal flora diversity and the levels of SCFAs(P<0.05, P<0.01). The raw and stir-fried products of AMR also exhibited the aforementioned effects, but they were weaker than the soil-fried products. Additionally, the auxiliary material hearth soil also had a certain pharmacodynamic effect. ConclusionSoil-fried AMR can enhance the protective effect on intestinal mucosal barrier in UC mice. These changes or heating-induced alterations in the microscopic structure and chemical composition of AMR may be attributed to the dual effects of adsorption of hearth soil.
3.Atorvastatin inhibits orthodontic tooth movement in rats by promoting periodontal bone formation
Xinyi SONG ; Siqi DING ; Yuhe CHENG ; Xiaoyu LIU ; Tingting WU
Acta Universitatis Medicinalis Anhui 2026;61(2):344-354
ObjectiveTo investigate the effects of atorvastatin (ATV) on the proliferation and differentiation of rat bone marrow mesenchymal stem cells (BMSCs), periodontal ligament stem cells (PDLSCs), and dental pulp stem cells (DPSCs) in vitro, and to validate the regulatory effect of ATV on periodontal bone formation and tooth movement using a rat orthodontic tooth movement (OTM) model. MethodsThe effects of ATV on the proliferation and osteogenic/odontogenic differentiation of rat BMSCs, PDLSCs, and DPSCs were assessed in vitro. CCK-8 assay was used to detect the proliferation of the three types of cells. Alkaline phosphatase (ALP) staining and Alizarin Red staining were employed to evaluate osteogenic differentiation capacity. Western blot was used to detect the expression of osteogenesis-related proteins [collagen type I (COL-I), Runt-related transcription factor 2 (Runx2), bone morphogenetic protein-2 (BMP-2), osteocalcin (OCN)] and the odontogenesis-related protein dentin sialophosphoprotein (DSPP) in BMSCs, PDLSCs and DPSCs. An OTM rat model was established, with rats randomly assigned to an ATV gavage group and a control group. The ATV gavage group received daily oral administration of ATV at a dose of 20 mg/kg, while the control group received an equal volume of solvent by gavage. Tooth movement distance was measured via Micro-CT on days 7, 14, and 21. Histomorphology of periodontal tissues was observed using Hematoxylin and Eosin (HE) staining and Masson staining. The gene and protein expression levels of osteogenic markers (BMP-2, Runx2, OCN) on the tension side of the first molar were detected by qRT-PCR and immunohistochemistry, respectively. ResultsATV at concentrations of 1×10⁻⁶ mol/L and 1×10⁻⁷ mol/L significantly promoted the proliferation and osteogenic/odontogenic differentiation of BMSCs, PDLSCs, and DPSCs, manifested as enhanced ALP activity, increased mineralized nodule formation, and up-regulated expression of osteogenic/odontogenic proteins COL-I, Runx2, BMP-2, OCN, and DSPP (P<0.001). In the OTM model, compared with the control group, the ATV gavage group showed a significant reduction in tooth movement distance (P<0.05), enhanced osteogenic activity in periodontal tissues, and significantly increased gene (P<0.001) and protein (P<0.05) expression of BMP-2, Runx2, and OCN on the tension side of the first molar. ConclusionATV enhances periodontal osteogenesis by promoting osteogenic/dentinogenic differentiation, thus inhibiting tooth movement.
4.Advances on glycolysis-oriented metabolic reprogramming and targeted therapeutics in pneumoconiosis
Siqi YANG ; Ting LIU ; Yiwei SHI
Journal of Environmental and Occupational Medicine 2026;43(1):126-132
Pneumoconiosis is a chronic interstitial lung disease caused by occupational exposure to mineral dust, characterized by persistent inflammation and progressive pulmonary fibrosis. Effective therapeutic options, however, remain limited. Recent multi-omics studies have revealed that glucose metabolic reprogramming, particularly the abnormal activation of glycolysis, plays a critical role in the pathogenesis of fibrotic diseases. This review summarized the key components involved in glycolytic reprogramming, including rate-limiting enzymes such as hexokinase, phosphofructokinase, pyruvate kinase, and lactate dehydrogenase, as well as regulatory factors such as hypoxia-inducible factor-1α (HIF-1α) and AMP-activated protein kinase (AMPK). Their roles in metabolic regulation and fibrogenesis were elaborated. Special emphasis was placed on alveolar macrophages and fibroblasts, in which enhanced glycolysis and lactate accumulation drive inflammatory responses and collagen deposition, contributing to disease progression. Advances on pharmacological agents such as nintedanib, 2-deoxyglucose, quercetin, metformin, and resveratrol were reviewed, highlighting their antifibrotic potential through modulation of glycolytic enzymes or related signaling pathways. Additionally, the interactions between glycolysis and fatty acid metabolism, amino acid metabolism, and oxidative phosphorylation were discussed, underscoring the significance of multi-pathway coupling in pneumoconiosis. Metabolic abnormalities in pneumoconiosis result from multi-level interactions across cells, molecules, and tissues. Consequently, future therapeutic strategies should shift from single-target interventions toward coordinated regulation of multiple pathways, integrating tissue-targeted drug delivery, metabolism-based stratified interventions, and multi-target combination therapies to achieve precision and personalized treatment.
5.Targeting ER lipid raft-associated 1 reveals a coordinated cholesterol-dependent vulnerability in hepatocellular carcinoma
Yiming ZHANG ; Yushan HOU ; Xinxin WANG ; Kaikun XU ; Pei JIANG ; Siqi WANG ; Huimin KANG ; Hu ZHANG ; Jingzhuo JIN ; Xiaofen HUANG ; Zifeng LIU ; Songpeng YANG ; Jiaqi LIU ; Lingqiang ZHANG ; Fuchu HE ; Chunyan TIAN ; Aihua SUN
Clinical and Molecular Hepatology 2026;32(2):866-883
Background/Aims:
Dysregulated cholesterol metabolism is a hallmark of hepatocellular carcinoma (HCC) that drives tumor initiation and progression. However, clinical targeting of cholesterol metabolism has yielded limited benefits due to stringent feedback in tumor cells. Identifying a central mediator capable of restoring cholesterol homeostasis within the cell’s intrinsically fine-tuned regulatory framework is urgently needed.
Methods:
We integrated a proteomic dataset from patients with cholesterol-dysregulated HCC into a global cholesterol metabolic regulatory network to identify potential therapeutic targets for disrupted cholesterol homeostasis. The prognostic significance of the candidate targets was further validated in an independent cohort through immunohistochemistry. Functional and mechanistic studies were conducted in vitro using HCC cell lines and in vivo using mouse models. The pharmacological efficacy of the candidate agent was evaluated in both subcutaneous and orthotopic HCC mouse models.
Results:
ER lipid raft-associated 1 (ERLIN1), a pivotal regulator of cholesterol metabolism reprogramming, was identified as an independent favorable prognostic indicator in HCC. ERLIN1 constrains HCC progression both in vitro and in vivo by stabilizing the INSIG1–SCAP–SREBP2 axis and maintaining the metabolic balance of intracellular cholesterol. Under hypoxia, impaired factor-inhibiting hypoxia-1-dependent hydroxylation of ASB11 at asparagine residues 90 and 92 enhances ASB11-mediated ERLIN1 degradation. Pharmacological targeting of this axis using zoledronic acid (ZoA) attenuated HCC progression by weakening the ASB11–ERLIN1 interaction and restoring cholesterol homeostasis.
Conclusions
ERLIN1 represents a druggable metabolic vulnerability in cholesterol-dysregulated HCC. Targeting the ASB11–ERLIN1 axis with the clinically approved ZoA reestablishes cholesterol homeostasis and offers a promising therapeutic strategy to overcome the current limitations of cholesterol-targeted HCC therapies.
6.The Role of Interferon Signaling Pathway in the Pathogenesis of Juvenile Dermatomyositis
Siqi DU ; Wenyue LIU ; Xinrong WU ; Lingyun MA ; Xinyi TIAN ; Yan LI
JOURNAL OF RARE DISEASES 2026;5(2):254-262
Juvenile dermatomyositis(JDM) is the most common idiopathic inflammatory myopathy in children, characterized by symmetric proximal muscle weakness and characteristic skin rashes, which may be accompanied by involvement of major organs. Aberrant upregulation of the interferon signaling pathway has been confirmed as the core pathological mechanism of JDM, and is closely associated with mitochondrial dysfunction, peripheral blood immune cell dysregulation, muscle damage and repair dysfunction, as well as cutaneous and pulmonary lesions. Interferon-related biomarkers and interferon scores can serve as evaluation indicators for disease activity. Type Ⅰ interferon inhibitors and Janus kinase inhibitors provide new therapeutic options for refractory JDM. This review systematically summarizes the role of the interferon signaling pathway in the pathogenesis of JDM and its potential therapeutic targets, aiming to provide references for the mechanistic research and precise treatment of JDM.
7.A prospective cohort study on glycolipid metabolic abnormalities and incident colorectal cancer risk
Qiaoyi XU ; Ruilin CHEN ; Yijing XIE ; Shuo WANG ; Renjia ZHAO ; Siqi TANG ; Linyao LU ; Huangbo YUAN ; Tiejun ZHANG ; Yanfeng JIANG ; Kelin XU ; Zhenqiu LIU ; Xingdong CHEN ; Chen SUO
Shanghai Journal of Preventive Medicine 2026;38(6):409-417
ObjectiveTo investigate the associations of multiple glycolipid metabolic indicators and their cumulative abnormality burden with incident colorectal cancer risk in a general population-based prospective cohort, and to examine the mediating role of glycolipid metabolic abnormalities in the relationships between smoking, alcohol consumption, physical activity, and colorectal cancer incidence. MethodsA total of 17 897 eligible participants recruited from the Taizhou Cohort between 2011 and 2014 were included. Cox proportional hazards regression models were used to assess the associations of conventional and derived glycolipid indicators, as well as a glycolipid abnormality index constructed from total cholesterol, triglycerides, high-density lipoprotein cholesterol, low-density lipoprotein cholesterol, fasting plasma glucose, and insulin, with incident colorectal cancer risk. Restricted cubic spline models were applied to evaluate dose-response relationships for major indicators. Receiver operating characteristic curves were generated to compare predictive performance across indicators. Mediation analyses were conducted to assess the mediating effects of the glycolipid abnormality index on the associations of smoking, alcohol consumption, and physical activity with colorectal cancer incidence. ResultsDuring a median follow-up of 11.2 years, 102 incident colorectal cancer cases were identified, with an incidence density of 51.2 per 100 000 person-years. After adjustment for potential confounders, Cox proportional hazards regression analyses showed that decreased high-density lipoprotein cholesterol was associated with a 1.74-fold higher risk of colorectal cancer (HR=1.74, 95%CI: 1.03‒2.95), elevated low-density lipoprotein cholesterol was associated with a 1.78-fold higher risk (HR=1.78, 95%CI: 1.05‒3.02), and abnormal fasting plasma glucose was associated with a 1.86-fold higher risk (HR=1.86, 95%CI: 1.15‒3.02). Triglycerides and fasting plasma glucose showed an approximately linear increasing association with colorectal cancer risk in multivariable restricted cubic spline models. The glycolipid abnormality index showed a clear gradient association with colorectal cancer risk; participants with three or more abnormal indicators had a 3.08-fold higher risk than those without abnormalities (HR=3.08, 95%CI: 1.60‒5.92). The area under the curve was 0.795, higher than that of individual glycolipid indicators and other combined indices, and gender-stratified analyses showed generally consistent patterns. Glycolipid metabolic abnormalities partially mediated the associations of smoking, alcohol consumption, and physical activity with colorectal cancer incidence, with mediation proportions of 8.33%, 9.45%, and 9.04%, respectively. ConclusionGlycolipid metabolic abnormalities are associated with an increased risk of incident colorectal cancer. The glycolipid abnormality index shows an increasing relationship with colorectal cancer risk and demonstrates better discrimination, and it partially mediates the associations of smoking, alcohol consumption, and physical activity with colorectal cancer incidence in the overall population.
8.Mechanisms of Tongmai Yangxin Pills and Tongxinluo Capsules in Treating Myocardial No-reflow Based on Treating Same Disease with Different Methods
Siqi LIU ; Wenqing YANG ; Ting CHEN ; Yan TANG ; Ju WANG ; Yaxuan PENG ; Haoxue QIN ; Lanyue DENG ; Jialu GONG ; Ning XU ; Shuying ZHANG ; Wei ZHANG ; Ting CHEN
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(17):125-133
ObjectiveTo investigate the mechanisms of Tongmai Yangxin pills (TMYX) and Tongxinluo capsules (TXL) in treating no-reflow (NR) after myocardial ischemia and reperfusion following the concept of treating the same disease with different methods, based on integrative pharmacology and experimental validation. MethodsEighty 8-week-old SPF-grade SD rats were randomly assigned into four groups (n=20): sham operation, NR, TMYX (4 g·kg-1), and TXL (2 mg·kg-1). A rat model of myocardial ischemia-reperfusion no-reflow was established by in-situ ligation of the left anterior descending coronary artery. Gastric gavage was first performed 4 h after the operation, and samples were collected on day 7. Thioflavin S staining was used to observe the NR area in rat myocardium. Echocardiography was performed to examine the cardiac function. Hematoxylin-eosin (HE) staining was conducted to observe the pathological changes of the myocardial tissue. An automatic biochemical analyzer was adopted to measure myocardial enzyme activity. Then, integrated pharmacology was applied for Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment analysis. Finally, Western blot was employed to quantify the protein levels of key targets in the myocardial tissue, including soluble guanylyl cyclase (sGC), cyclic guanosine monophosphate (cGMP)/dependent protein kinase (PKG), phosphorylated phosphatidylinositol 3-kinase (p-PI3K), phosphorylated protein kinase B (p-Akt), and hypoxia-inducible factor-1α (HIF-1α). ResultsCompared with the sham operation group, the NR group showed increased NR area of myocardium, decreased left ventricular ejection fraction (EF), left ventricular fractional shortening (FS), left ventricular outflow tract peak velocity (LVOT Peak), and left ventricular stroke volume (LVSV) (P<0.01), fractured and disordered myocardial fibers as well as inflammatory cell infiltration in the myocardial tissue, enhanced activities of creatine kinase (CK), creatine kinase isoenzyme (CK-MB), and lactate dehydrogenase (LDH) in the myocardial tissue (P<0.01), and downregulated protein levels of sGC, PKG, phosphorylated (p)-PI3K (Tyr458), and p-Akt (Tyr315) in the myocardial tissue (P<0.05, P<0.01). The expression level of HIF-1α protein showed a downward trend. Compared with the NR group, the TMYX group and TXL group exhibited a decreasing trend in myocardial NR area, EF, FS, and LVOT Peak significantly increased (P<0.05, P<0.01), LVSV showed an upward trend, ameliorated myocardial pathological morphology and inflammatory infiltration, reductions in CK, CK-MB, and LDH activities (P<0.05, P<0.01), and upregulated protein levels of sGC, PKG, p-PI3K (Tyr458) in myocardial tissue (P<0.05, P<0.01), the protein expressions of p-Akt (Tyr315) and HIF-1α showed an upward trend. A comparison of the therapeutic effects between the two compound prescriptions showed that TMYX tended to exert a better effect in restoring cardiac function and protecting cardiac structure in NR rats, whereas TXL was more effective in reducing myocardial NR area and lowering myocardial enzyme activities in NR rats. Integrative pharmacology analysis combined with experimental verification demonstrated that both TMYX and TXL could alleviate NR through the following mechanisms: activating the cyclic cGMP/PKG signaling pathway to regulate vascular tone, activating the PI3K/Akt signaling pathway to dilate blood vessels, and activating the HIF-1 signaling pathway to inhibit oxidative stress. However, TMYX had an advantage in activating the cGMP/PKG pathway, while TXL was superior in activating the PI3K/Akt pathway. The two compound prescriptions exerted comparable effects on the HIF-1 signaling pathway, which might serve as their common therapeutic pathway. ConclusionBoth TMYX and TXL could alleviate NR damage. TMYX exerts its protective effect against NR mainly by activating the cGMP/PKG signaling pathway, while TXL exerts its effect mainly through the PI3K/Akt pathway. The HIF-1α signaling pathway may be a common pathway for the two compound prescriptions to exert their protective effects against NR. This study reveals the similarities and differences between TMYX and TXL in the treatment effect and mechanism for NR, providing an experimental basis and a theoretical basis for better clinical application of the two compound prescriptions.
9.Hemophagocytic syndrome secondary to visceral leishmaniasis: a case report
Chinese Journal of Schistosomiasis Control 2026;38(3):330-332
This article presents the diagnosis and treatment of a case with hemophagocytic syndrome secondary to visceral leishmaniasis. The patient had been misdiagnosed for a long period of time, and was finally definitively diagnosed as hemophagocytic syndrome secondary to visceral leishmaniasis through laboratory tests, bone marrow smear microscopy, and metagenomics next-generation sequencing. Due to unsatisfactory therapeutic efficacy, the patient's family members decided to abandon treatment, and the patient subsequently died following discharge from hospital.
10.The mechanism of YB1-mediated MDR1 regulation in cisplatin-induced drug resistance of intrahepatic cholangiocarcinoma
Siqi WANG ; Miao CHEN ; Xinyu LUO ; Heng LIU
Acta Universitatis Medicinalis Anhui 2026;61(8):1383-1391
ObjectiveTo explore the mechanism by which Y-box binding protein 1 (YB1) mediates the expression of multidrug resistance gene 1 (MDR1) and regulates cisplatin-induced resistance in intrahepatic cholangiocarcinoma (ICC). MethodsAfter treating human ICC HCCC-9810 cells with different concentrations of cisplatin, Western blot and immunofluorescence techniques were used to detect the expression of YB1 and phosphorylated YB1 (pYB1) and changes in their cellular localization. In addition, qPCR and Western blot were used to analyze the expression changes of drug resistance-related proteins MDR1, multidrug resistance-associated protein 2 (MRP2), and major vault protein (MVP). Chromatin immunoprecipitation (ChIP) assay was performed to examine the binding of YB1 to the MDR1 promoter in HCCC-9810 cells with or without cisplatin treatment. Additionally, bisulfite sequencing (BS-seq) was used to determine the methylation status of cytosine-phosphate-guanine (CpG) islands within the MDR1 promoter in HCCC-9810 cells, before and after cisplatin treatment. ResultsAfter HCCC-9810 cells were treated with cisplatin, the total amount of intracellular YB1 protein did not change, but the level of pYB1 gradually increased, accompanied by the nuclear migration of YB1 and pYB1 protein. After HCCC-9810 cells were induced with cisplatin, the expression of MDR1 significantly increased, and the drug resistance of the cells also increased. If the expression of MDR1 was inhibited beforehand, the increase in drug resistance of the cells can be reversed. Similarly, after knocking down the expression of YB1 in HCCC-9810 cells, the nuclear migration of YB1 and pYB1 significantly decreased, and the expression of MDR1 significantly decreased, resulting in a significant increase in sensitivity to cisplatin chemotherapy. When HCCC-9810 cells were not stimulated by external factors, the CpG island in the promoter region of MDR1 showed a high methylation state, and multiple transcription factors, including YB1, could not bind to it. When HCCC-9810 cells were treated with cisplatin, the CpG island in the promoter region of MDR1 underwent demethylation, and the binding force between YB1 and the MDR1 promoter in the nucleus increased, activating MDR1 expression. ConclusionYB1 is highly expressed in the cytoplasm of ICC cells. Cisplatin chemotherapy induces nuclear translocation of YB1, accompanied by demethylation of the CpG island in the MDR1 promoter. Nuclear YB1 binds to the MDR1 promoter and activates transcription, ultimately leading to chemotherapy resistance.

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