1.Guizhi Shaoyao Zhimutang and Active Components of Its Single Herbs in Treatment of Rheumatoid Arthritis: A Review
Jian LIU ; SHIPEIRU ; Shuang LI ; Jinzhao ZHAO ; Naijun CAO ; Mingxiu JIN ; Jing YU
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(10):346-354
Rheumatoid arthritis (RA) is a common autoimmune disease characterised clinically by symmetrical joint pain, swelling, and stiffness. Long-term chronic synovial inflammation can lead to severe joint damage and even disability, thereby affecting quality of life for patients. Current clinical treatment of RA emphasises an integrated approach combining traditional Chinese and Western medicine, with traditional Chinese medicine offering certain advantages in reducing disease activity of RA, preventing relapses, and other aspects. Modern clinical evidence confirms that Guizhi Shaoyao Zhimutang (GSZT) is effective in improving symptoms such as immune metabolism, joint stiffness, and joint pain in RA patients. Pharmacological studies have revealed that GSZT primarily contains components such as cinnamaldehyde, total glucosides of paeony, total alkaloids of Aconiti Lateralis Radix Praeparata, glycyrrhetinic acid, zingiberone, isoimperatorin, ephedra polysaccharides, and cedrol. It improves RA symptoms via multiple mechanisms and targets, including enhancing immune responses, exerting anti-inflammatory and analgesic effects, regulating relevant signalling pathways, inhibiting cell apoptosis, and suppressing bone destruction. This paper reviewed the syndrome patterns and pharmacological basis of GSZT in the treatment of RA, as well as its clinical applications and related mechanisms, thereby providing a theoretical basis and reference for the further development and utilisation of GSZT in the treatment of RA.
2.Guizhi Shaoyao Zhimutang and Active Components of Its Single Herbs in Treatment of Rheumatoid Arthritis: A Review
Jian LIU ; SHIPEIRU ; Shuang LI ; Jinzhao ZHAO ; Naijun CAO ; Mingxiu JIN ; Jing YU
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(10):346-354
Rheumatoid arthritis (RA) is a common autoimmune disease characterised clinically by symmetrical joint pain, swelling, and stiffness. Long-term chronic synovial inflammation can lead to severe joint damage and even disability, thereby affecting quality of life for patients. Current clinical treatment of RA emphasises an integrated approach combining traditional Chinese and Western medicine, with traditional Chinese medicine offering certain advantages in reducing disease activity of RA, preventing relapses, and other aspects. Modern clinical evidence confirms that Guizhi Shaoyao Zhimutang (GSZT) is effective in improving symptoms such as immune metabolism, joint stiffness, and joint pain in RA patients. Pharmacological studies have revealed that GSZT primarily contains components such as cinnamaldehyde, total glucosides of paeony, total alkaloids of Aconiti Lateralis Radix Praeparata, glycyrrhetinic acid, zingiberone, isoimperatorin, ephedra polysaccharides, and cedrol. It improves RA symptoms via multiple mechanisms and targets, including enhancing immune responses, exerting anti-inflammatory and analgesic effects, regulating relevant signalling pathways, inhibiting cell apoptosis, and suppressing bone destruction. This paper reviewed the syndrome patterns and pharmacological basis of GSZT in the treatment of RA, as well as its clinical applications and related mechanisms, thereby providing a theoretical basis and reference for the further development and utilisation of GSZT in the treatment of RA.
3.Influence of Antigen Type on the Establishment of an Induced Sjögren Syndrome Mouse Model
Wenshuang RONG ; Yuanfei NIU ; Meiting LIU ; Mengyuan YANG ; Shuang CUI ; Lina MA ; Yao FU ; Lianmei WANG ; Junling CAO
Laboratory Animal and Comparative Medicine 2026;46(2):178-190
ObjectiveThis study aims to compare the modeling effects of submaxillary gland antigen and salivary gland antigen in the establishment of Sjögren syndrome (SS) mouse models, and to characterize the phenotypic and immunological features of these models in comparison with spontaneous SS-prone non-obese diabetic (NOD)/LtJ mice. MethodsAdult C57BL/6J mice (equal numbers of males and females) were immunized with submaxillary gland antigen or salivary gland antigen, respectively, combined with Freund's adjuvant to induce SS models. Mice immunized with phosphate-buffered saline (PBS) combined with Freund's adjuvant served as the control group. Immunization was induced via multiple subcutaneous injections in the back with antigen combined with Freund's complete adjuvant (FCA) on Days 1 and 7. A booster immunization was administered via multiple subcutaneous injections in the back with antigen combined with Freund's incomplete adjuvant (FIA) on Day 14. Female NOD/LtJ mice were used as the spontaneous SS model group, with ICR mice as the corresponding control strain for comparative analysis. Body weight, water intake, and salivary flow rate of mice were dynamically monitored for 4 weeks. At the end of the experiment, tissue and serum samples were collected, the weights of submaxillary glands, thymus, and spleen were measured, and organ indices (organ-to-body weight ratios) were calculated. Pathological morphological analysis of the submaxillary gland and spleen was performed with hematoxylin and eosin (HE) staining. Serum interleukin-17 (IL-17) level was detected using enzyme-linked immunosorbent assay (ELISA). Real-time quantitative polymerase chain reaction was used to detect the mRNA expression levels of SS type A (SSA) and SS type B (SSB) in submaxillary gland tissues. ResultsFemale mice in the submaxillary gland antigen group exhibited significantly increased water intake (P<0.05) and reduced salivary flow rate (P<0.05) compared with the female control group. No statistically significant differences were observed in the submaxillary gland index, thymus index and spleen index (P>0.05). Focal lymphocytic infiltration was observed in the submaxillary glands, and the splenic marginal zone was enlarged. Serum IL-17 levels were significantly increased (P<0.05). There was no significant difference in submaxillary gland SSA/SSB expression levels (P>0.05). Compared with the female control group, female mice in the salivary gland antigen group showed no statistically significant differences in water intake, salivary flow rate, submaxillary gland index, and spleen index (P>0.05), whereas the thymus index was significantly reduced (P<0.01). Mild inflammatory cell infiltration and glandular atrophy were observed in the submaxillary glands, and the splenic white pulp and marginal zone were slightly enlarged. Serum IL-17 levels and submaxillary gland SSB mRNA expression levels were significantly increased (P<0.01), whereas no significant change was observed in submaxillary gland SSA expression levels (P>0.05). Compared with the male control group, mild submaxillary gland atrophy was observed in male mice in the submaxillary gland antigen group, whereas no obvious changes were found in other modeling-related indicators (P>0.05). Compared with the ICR control group, NOD/LtJ model mice exhibited elevated water intake (P<0.05), significantly reduced salivary flow rate (P<0.01), no significant differences in the submaxillary gland index or spleen index (P>0.05), but a significantly increased thymus index (P<0.05). Marked focal infiltration was observed in the submaxillary glands, the splenic marginal zone was obviously enlarged, and serum IL-17 concentrations as well as submaxillary gland SSA/SSB expression levels were significantly increased (P<0.05). ConclusionSubmaxillary gland antigen and salivary gland antigen can induce SS-related features in female C57BL/6J mice. The SS-related phenotype is more pronounced in the submaxillary gland antigen group than in the salivary gland antigen group, but weaker than that in spontaneously SS-prone female NOD/LtJ mice. Immunization of male C57BL/6J mice with submaxillary or salivary gland antigens fails to induce an obvious SS phenotype.
4.Forty Cases of Mid-Stage Diabetes Kidney Disease Patients of Blood Stasis Syndrome Treated with Huayu Tongluo Formula (化瘀通络方) as an Adjunct Therapy: A Multi-Center, Randomized, Double-Blind, Placebo-Controlled Trial
Yun MA ; Kaishuang WANG ; Shuang CAO ; Bingwu ZHAO ; Lu BAI ; Su WU ; Yuwei GAO ; Xinghua WANG ; Dong BIAN ; Zhiqiang CHEN
Journal of Traditional Chinese Medicine 2025;66(6):588-595
ObjectiveTo evaluate the clinical efficacy of Huayu Tongluo Formula (化瘀通络方, HTF) in patients with mid-stage diabetic kidney disease of blood stasis syndrome and explore its potential mechanisms. MethodsA multi-center, randomized, double-blind, placebo-controlled clinical trial was conducted. Ninety patients of mid-stage diabetic kidney disease of blood stasis syndrome were divided into a control group of 46 cases and a treatment group of 44 cases. Both groups received conventional western medicine treatment, the treatment group additionally taking HTF, while the control group taking a placebo of the formula. The treatment was administered once daily for 24 weeks. The primary outcomes included 24-hour urine total protein (24 h-UTP), serum albumin (Alb), glycated hemoglobin (HbA1c), and serum creatinine (Scr).The secondary outcomes included changes in levels of endothelin-1 (ET-1), nitric oxide (NO), vascular endothelial growth factor (VEGF), and traditional Chinese medicine (TCM) syndrome scores before and after treatment. Clinical efficacy was evaluated based on TCM syndrome scores and overall disease outcomes. Adverse reactions and endpoint events were recorded. ResultsIn the treatment group after treatment, 24 h-UTP, ET-1, and VEGF levels significantly decreased (P<0.05), Alb and NO levels significantly increased (P<0.05); while the TCM syndrome scores for edema, lumbar pain, numbness of limbs, dark purple lips, dark purple tongue or purpura, and thin, rough pulse all significantly decreased (P<0.05). In the control group, no significant changes were observed in any of the indicators after treatment (P>0.05).Compared with the control group, the treatment group showed significant reductions in 24 h-UTP, ET-1, and VEGF levels, and increases in Alb and NO levels (P<0.05). The TCM syndrome scores for edema, lumbar pain, dark purple tongue or purpura, and thin, rough pulse were all lower in the treatment group than in the control group (P<0.05). The total effective rate of TCM syndrome in the treatment group was 59.09% (26/44), and the overall clinical effective rate was 45.45% (20/44). In the control group, these rates were 15.22% (7/46) and 8.7% (4/46), respectively, with the treatment group showing significantly better outcomes (P<0.05). A total of 7 adverse events occurred across both groups, with no significant difference (P>0.05). No endpoint events occurred during the study. ConclusionOn the basis of conventional treatment of Western medicine, HTF can further reduce urinary protein levels and improve clinical symptoms in patients with mid-stage diabetic kidney disease of blood stasis syndrome. The mechanism may be related to its effects on endothelial function.
5.Efficacy and safety of repetitive transcranial magnetic stimulation in the treatment of postpartum depression: a Meta-analysis
Shuang ZHENG ; Luping YANG ; Binyang HUANG ; Miao CAO ; Mengxiao LI ; Wenjun YANG ; Chunliang GUO ; Rongmei ZHENG ; Yuyang ZHANG ; Hua LI
Sichuan Mental Health 2025;38(6):568-576
BackgroundPostpartum depression (PPD) is a prevalent postpartum complications that significantly compromises women's psychological and physical well-being. Repetitive transcranial magnetic stimulation (rTMS), a conventional neuromodulation technique, has been increasingly used in the treatment of PPD. However, high-quality evidence regarding its efficacy and safety remains limited. ObjectiveTo evaluate the efficacy and safety of rTMS in the treatment of PPD, thereby providing references for clinical treatment. MethodsDatabases including Cochrane Library, PubMed, Embase, CNKI, Wanfang, VIP and China Biology Medicine disc (CBM) were electronically searched for randomized controlled trials (RCTs) on rTMS for PPD, with the search spanning from database inception to February 8, 2025. Study quality was assessed using the Cochrane Handbook for Systematic Reviews of Interventions 5.0.1, and the certainty of evidence was graded according to the Grading of Recommendations Assessment, Development and Evaluation (GRADE) approach. Meta-analysis was conducted using RevMan 5.3 and Stata 12.0. The outcomes of the Meta-analysis included the total effective rate, Edinburgh Postnatal Depression Scale (EPDS) score, Hamilton Depression Rating Scale (HAMD) score, and adverse reactions (dizziness, headache, nausea, diarrhea, and the overall incidence of adverse reactions). ResultsA total of 11 studies involving 729 patients with PPD were included. Meta-analysis results showed that the total effective rate in the study group was significantly higher than that in the control group (OR=5.54, 95% CI: 3.07–10.01, P<0.01). Both EPDS score (SMD=-2.38, 95% CI: -3.39–-1.37, P<0.01) and HAMD score (SMD=2.53, 95% CI: 1.21–3.85, P<0.01) in the study group were significantly lower than those in the control group, with statistically significant differences. Comparisons between the study group and control group reveal no significant differences in the incidence of dizziness and headache (RR=1.47, 95% CI: 0.63–3.43, P>0.05), nausea (RR=1.46, 95% CI: 0.55–3.86, P>0.05), diarrhea (RR=0.71, 95% CI: 0.23–2.20, P>0.05), and overall adverse reactions (RR=1.30, 95% CI: 0.79–2.15, P>0.05). GRADE assessment rated the four indicators of dizziness and headache, diarrhea, overall incidence of adverse reactions, and EPDS score as "moderate-certainty evidence", and rated the total effective rate, nausea, and the HAMD score as "low-certainty evidence". ConclusionrTMS demonstrates certain therapeutic efficacy for PPD, with a safety profile comparable to conventional treatment. [Funded by Sichuan Psychological Society Research Planning Project (number, SCSXLXH202403099); Guiding Science and Technology Plan Project of Guangyuan (number, 23ZDYF0095)]
6.CT angiography radiomics for evaluating risk of basilar tip aneurysm rupture
Song LIU ; Chao TIAN ; Tao REN ; Chen CAO ; Song JIN ; Shuang XIA
Chinese Journal of Medical Imaging Technology 2025;41(1):20-24
Objective To observe the value of CT angiography(CTA)radiomics for evaluating the risk of basilar tip aneurysm(BTA)rupture.Methods Totally 133 BTA patients were retrospectively enrolled and divided into ruptured group(n=39)and unruptured group(n=94)based on BT A ruptured or not,also divided into training set(n=93)and test set(n=40)at the ratio of 7∶3.CTA radiomics features of BTA were extracted,the best radiomics features were screened,and the radiomics score(Radscore)was calculated.Then machine learning(ML)models were established with logistic regression(LR),random forest(RF),decision tree(DT)and K-nearest neighbor(KNN)algorithms,respectively.Radscore model was also established,and finally a combined model was constructed based on clinical data,routine imaging findings and Radscore.The efficacy of the above models for evaluating the risk of BTA rupture were comparatively analyzed.Results Finally 4 radiomics features of BTA were obtained.The area under the curve(AUC)of LR,RF,DT and KNN radiomics models for differentiating ruptured and unruptured BTA in training set was 0.770,0.816,0.817 and 0.795,respectively,while that in test set was 0.795,0.793,0.786 and 0.824,respectively,both being not significant different(both P>0.05).Patient's gender,alcohol consumption history,BTA morphology and Radscore were all independent impact factors of BT A rupture(all P<0.05),which were used to establish a clinical-routine imaging model.For all 133 cases,AUC of the combination model for differentiating ruptured and unruptured BTA was 0.877,of Radscore model was 0.775,while that of clinical-routine imaging model was 0.677,of the former was significantly higher than of the last two(both P<0.05).Conclusion CTA radiomics was helpful for evaluating the risk of BTA rupture.Combining with clinical data and routine imaging findings could further improve the value of CTA radiomics.
7.Exploring the clinical efficacy of Yangyin Shugan Formula in treating 307 patients with ovarian dysfunction at different stages based on the"preventive treatment of disease"theory:a real world study
Xuchun HUANG ; Feifei WANG ; Na LIANG ; Shuang HUANG ; Piaoying CHEN ; Jiarui HOU ; Fangping CHENG ; Xiaojing CAO ; Xiaoyun WANG
Journal of Beijing University of Traditional Chinese Medicine 2025;48(7):943-953
Objective Based on the"preventive treatment of disease"theory and real-world data,this study aimed to evaluate the clinical efficacy of Yangyin Shugan Formula in patients with ovarian dysfunction characterized by the syndrome of kidney deficiency and liver depression at different stages and to provide evidence for optimizing the timing of traditional Chinese medicine(TCM)in premature ovarian insufficiency(POI)management.Methods Ovarian dysfunction patients under 40 years old characterized by syndrome of kidney deficiency and liver depression,registered in the outpatient electronic medical records of the Second Affiliated Hospital of Guangzhou University of Chinese Medicine from January 2020 to December 2023,were stratified into three groups:subclinical POI,POI,and premature ovarian failure(POF)groups.The therapeutic outcomes of the three groups of patients were compared,including TCM syndrome total response rates,menstrual total response rates/normalization(cured)rates,base follicle-stimulating hormone(FSH)total response rate/normalization rates and anti-Müllerian hormone(AMH)levels.Results A total of 307 patients meeting the research criteria were included(97 cases in subclinical POI group,112 cases in POI group,and 98 cases in POF group).The TCM syndrome total response rates ranked as subclinical POI group(98.97%,96/97)>POI group(95.54%,107/112)>POF group(83.67%,82/98),with the POF group was lower than that of the subclinical POI and POI groups(P<0.017);while the difference of the subclinical POI group with the POI group was not significant.Menstrual total response rates ranked as subclinical POI group(97.22%,70/72)>POI group(72.32%,81/112)>POF group(51.02%,50/98),the differences among the three groups and in the post-hoc comparisons were significant(P<0.01,P<0.017);normalization rates ranked as subclinical POI group(90.28%,65/72)>POI group(54.46%,61/112)>POF group(26.53%,26/98),the differences among the three groups and in the post-hoc comparisons were significant(P<0.01,P<0.017).FSH total response rates ranked as subclinical POI group(89.69%,87/97)>POI group(81.25%,91/112)>POF group(60.20%,59/98),while POF group was lower than that of the other two groups(P<0.017),and the difference of the subclinical POI group with the POI group was not significant.Normalization FSH rates ranked as subclinical POI group(71.13%,69/97)>POI group(53.57%,60/112)>POF group(16.33%,16/98),the differences among the three groups and in the post-hoc comparisons were significant(P<0.01,P<0.017).Compared with before treatment,the FSH levels in all three groups decreased after treatment(P<0.01).The reduction of FSH in the POF and POI groups were better than that in the subclinical P OI group(P<0.017).No significant difference was observed in the reduction of FSH between the POI and POF groups.Post-treatment AMH elevation observed in the subclinical POI and POI groups(P<0.01).Conclusion Yangyin Shugan Formula improves the menstrual conditions and TCM syndromes across all the stages.It also improves elevated FSH levels across all the stages and has a specific effect on normalizing FSH and menstruation.Yangyin Shugan Formula increases the AMH levels of patients with subclinical POI and POI,highlighting the applicability of TCM in staged preventive management.
8.Effect of vitamin E succinate on autophagy in human gastric cancer cells via mitochondria-associated endoplasmic reticulum membranes
Miaomiao CAO ; Fangyu CHEN ; Zhiyang WEI ; Mengmeng LÜ ; Ziqing XING ; Jinze WANG ; Shuang LI ; Liying HOU
Chinese Journal of Pathophysiology 2025;41(11):2157-2165
AIM:This study aims to investigate whether vitamin E succinate(VES)induces autophagy in hu-man gastric cancer cells through the promotion of mitochondria-associated endoplasmic reticulum membranes(MAMs).METHODS:Human gastric cancer cell lines MKN28 and MKN45 were cultured in vitro.Cell viability was assessed us-ing the CCK8 assay,and two cell growth curves were plotted to determine the treatment concentration of VES.Control groups,VES dose groups(MKN28:5,10,20,and 40 mg/L;MKN45:10,20,40,and 80 mg/L),an autophagy-posi-tive control group(rapamycin,RAPA,100 nmol/L),and a MAMs-positive control group(oligomycin A,10 mg/L)were set up.Cells were harvested after 24 h of treatment for subsequent experiments.The formation of autophagosomes and MAMs was observed using transmission electron microscopy.The expression levels of autophagy-related proteins,includ-ing beclin-1,LC3-II/LC3-I,and p62,were detected by Western blot.MAMs labeled with split green fluorescent protein(GFP)were visualized by fluorescence microscopy.The expression of mitofusin 2(MFN2),a key molecule of MAMs,was also detected by Western blot.To inhibit MFN2 specifically,the cells were treated with mitochondrial fusion inhibitor 8(MFI8)and simultaneously transfected with an MFN2 plasmid to achieve MFN2 overexpression(OE-MFN2).The cells were divided into control group,MFI8(20 μmol/L)group,VES groups(20 mg/L for MKN28 cells and 40 mg/L for MKN45 cells),VES+MFI8 group,OE-MFN2+MFI8 group and OE-MFN2+VES+MFI8 group.The MAMs were visualized by fluorescence microscopy,and the expression changes of MFN2,beclin-1 and LC3-II/I were detected by Western blot.RESULTS:The results of the CCK8 assay showed that VES significantly inhibited the viability of both human gastric can-cer cell lines(P<0.05).After VES treatment,the formation of typical autophagosomes and MAMs was observed in both cell lines by transmission electron microscopy.Fluorescence microscopy showed a significant increase in GFP signals of MAMs.Western blot analysis showed that with increasing doses of VES,the expression levels of MFN2,beclin-1,and LC3-II/I were significantly up-regulated,while that of p62 was significantly down-regulated(P<0.05).Compared with VES group,the cells pretreated with MFI8 followed by VES exposure showed markedly reduced GFP signals of MAMs and much lower protein levels of MFN2,beclin-1 and LC3-II/LC3-I(P<0.05).Transfection with an MFN2 overexpression plasmid rescued MFN2 expression.Compared with VES+MFI8 group,the cells in OE-MFN2+VES+MFI8 group had much higher protein expression levels of MFN2,beclin-1 and LC3-II/LC3-I(P<0.05).CONCLUSION:The VES may partici-pates in the regulation of autophagy in human gastric cancer cells by promoting the formation of MAMs.
9.Effect and Safety of Fuzheng Huazhuo Decoction against Prolonged SARS-CoV-2 Clearance: A Retrospective Cohort Study.
Wen ZHANG ; Hong-Ze WU ; Xiang-Ru XU ; Yu-Ting PU ; Cai-Yu CHEN ; Rou DENG ; Min CAO ; Ding SUN ; Hui YI ; Shuang ZHOU ; Bang-Jiang FANG
Chinese journal of integrative medicine 2025;31(5):387-393
OBJECTIVE:
To evaluate the effect and safety of Chinese medicine (CM) Fuzheng Huazhuo Decoction (FHD) in treating patients with coronavirus disease 2019 (COVID-19) who persistently tested positive for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2).
METHODS:
This retrospective cohort study was conducted at Shanghai New International Expo Center shelter hospital in China between April 1 and May 30, 2022. Patients diagnosed as COVID-19 with persistently positive SARS-CoV-2 reverse transcription-polymerase chain reaction (RT-PCR) test results for ⩾8 days after diagnosis were enrolled. Patients in the control group received conventional Western medicine (WM) treatment, while those in the FHD group received conventional WM plus FHD for at least 3 days. The primary outcome was viral clearance time. Secondary outcomes included negative conversion rate within 14 days, length of hospital stay, cycle threshold (Ct) values of the open reading frame 1ab (ORF1ab) and nucleocapsid protein (N) genes, and incidence of new-onset symptoms during hospitalization. Adverse events (AEs) that occurred during the study period were recorded.
RESULTS:
A total of 1,765 eligible patients were enrolled in this study (546 in the FHD group and 1,219 in the control group). Compared with the control group, patients receiving FHD treatment showed shorter viral clearance time for nucleic acids [hazard ratio (HR): 1.500, 95% confidence interval (CI): 1.353-1.664, P<0.001] and hospital stays (HR: 1.371, 95% CI: 1.238-1.519, P<0.001), and a higher negative conversion rate within 14 days (96.2% vs. 82.6%, P<0.001). The incidence of new-onset symptoms was 59.5% in the FHD group, similar to 57.8% in the control group (P>0.05). The Ct values of ORF1ab and N genes increased more rapidly over time in the FHD group than those in the control group post-randomization (ORF1ab gene: β =0.436±0.053, P<0.001; N gene: β =0.415 ±0.053, P<0.001). The incidence of AEs in the FHD group was lower than that in the control group (24.2% vs. 35.4%, P<0.001). No serious AEs were observed.
CONCLUSION
FHD was effective and safe for patients with persistently positive SARS-CoV-2 PCR tests. (Registration No. ChiCTR2200063956).
Humans
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Drugs, Chinese Herbal/adverse effects*
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Retrospective Studies
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Male
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Female
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Middle Aged
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COVID-19 Drug Treatment
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SARS-CoV-2/drug effects*
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COVID-19/virology*
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Adult
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Aged
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Treatment Outcome
10.USP51/GRP78/ABCB1 axis confers chemoresistance through decreasing doxorubicin accumulation in triple-negative breast cancer cells.
Yang OU ; Kun ZHANG ; Qiuying SHUAI ; Chenyang WANG ; Huayu HU ; Lixia CAO ; Chunchun QI ; Min GUO ; Zhaoxian LI ; Jie SHI ; Yuxin LIU ; Siyu ZUO ; Xiao CHEN ; Yanjing WANG ; Mengdan FENG ; Hang WANG ; Peiqing SUN ; Yi SHI ; Guang YANG ; Shuang YANG
Acta Pharmaceutica Sinica B 2025;15(5):2593-2611
Recent studies have indicated that the expression of ubiquitin-specific protease 51 (USP51), a novel deubiquitinating enzyme (DUB) that mediates protein degradation as part of the ubiquitin‒proteasome system (UPS), is associated with tumor progression and therapeutic resistance in multiple malignancies. However, the underlying mechanisms and signaling networks involved in USP51-mediated regulation of malignant phenotypes remain largely unknown. The present study provides evidence of USP51's functions as the prominent DUB in chemoresistant triple-negative breast cancer (TNBC) cells. At the molecular level, ectopic expression of USP51 stabilized the 78 kDa Glucose-Regulated Protein (GRP78) protein through deubiquitination, thereby increasing its expression and localization on the cell surface. Furthermore, the upregulation of cell surface GRP78 increased the activity of ATP binding cassette subfamily B member 1 (ABCB1), the main efflux pump of doxorubicin (DOX), ultimately decreasing its accumulation in TNBC cells and promoting the development of drug resistance both in vitro and in vivo. Clinically, we found significant correlations among USP51, GRP78, and ABCB1 expression in TNBC patients with chemoresistance. Elevated USP51, GRP78, and ABCB1 levels were also strongly associated with a poor patient prognosis. Importantly, we revealed an alternative intervention for specific pharmacological targeting of USP51 for TNBC cell chemosensitization. In conclusion, these findings collectively indicate that the USP51/GRP78/ABCB1 network is a key contributor to the malignant progression and chemotherapeutic resistance of TNBC cells, underscoring the pivotal role of USP51 as a novel therapeutic target for cancer management.

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