1.Development of a Diagnostic Scale for Qi-Yin Deficiency with Blood Stasis Syndrome in Diabetic Macrovascular Disease
Qingzhi LIANG ; Ting LUO ; Yi SU ; Xiaoqin LIU ; Hong GAO ; Hongyan XIE ; Chunguang XIE
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(11):225-234
ObjectiveTo construct a standardized diagnostic scale for Qi-Yin deficiency with blood stasis syndrome in diabetic macrovascular disease. MethodsLiterature related to Qi-Yin deficiency with blood stasis syndrome in diabetic macrovascular disease was retrieved from CNKI, VIP, and Wanfang databases. Diagnostic information from four diagnostic methods was extracted and standardized, with items having a frequency of ≥15 included in the item pool. A three-round Delphi expert consultation was conducted, screening items using support degree, mean score, rank sum, and coefficient of variation. Item weights were determined using analytic hierarchy process (AHP), gactor analysis (FA), and combined weighting method (CWM). The optimal weighting method was selected by comparing the area under the receiver operating characteristic (ROC) curve (AUC). The Youden index was calculated to establish the diagnostic cutoff value, which was proportionally scaled. ResultsA total of 102 studies were included. Thirty-five items were incorporated into the item pool. The authority coefficients for the three Delphi rounds were 0.82, 0.85, and 0.86, with coordination coefficients of 0.648, 0.538, and 0.506, respectively. Fifteen items were retained after screening. ROC curve analysis showed the AUC ranking as FA > CWM > AHP. The maximum Youden index was 0.814, corresponding to a diagnostic cutoff of 8.361 (scaled to 40 points). The final scale adopted a structured diagnostic framework: the symptom dimension requires at least 2 items, and the tongue or pulse dimension requires at least 1 category. ConclusionThis study developed a standardized diagnostic scale for Qi-Yin deficiency with blood stasis syndrome in diabetic macrovascular disease. Core items were screened via the Delphi method, with factor analysis identified as the optimal weighting method through AUC comparison. The diagnostic threshold (40 points) and structured diagnostic framework provide a quantitatively clear, clinically practical tool.
2.Establishment and Evaluation of Diabetic Macrovascular Atherosclerosis Model with Qi and Yin Deficiency Syndrome
Ting LUO ; Qingzhi LIANG ; Xi PENG ; Yi SU ; Hongyan XIE ; Chunguang XIE
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(13):86-98
ObjectiveTo explore the establishment of a rat model of diabetic macrovascular atherosclerosis (DMA) with Qi and Yin deficiency syndrome induced by high-fat diet, streptozotocin (STZ), and Yin-depleting herbs, and to evaluate its biological characteristics. MethodsForty SD rats were randomly divided into a blank group (n=10) and a modeling group (n=30). Except for the blank group, rats in the model group were fed a high-fat diet for 4 weeks, followed by intraperitoneal injection of STZ (30 mg·kg-1) to establish a diabetic model. Twenty-four successfully modeled diabetic rats were randomly divided into a model group (n=7), a Qi and Yin deficiency syndrome group (n=8), and a counter-syndrome group (n=9). Except for the model group, rats received intragastric administration of Yin-depleting herbs (1.2 g·kg-1) for 8 weeks. The counter-syndrome group was further treated with Shenqi compound formula (1.69 g·kg-1) for an additional 8 weeks. General condition and body weight were recorded, and syndrome-related indicators were assessed, including precordial temperature, skin moisture content, grip strength, open-field test performance, and tongue appearance. Serum levels of vascular endothelial growth factor (VEGF), endothelin-1 (ET-1), vascular cell adhesion molecule-1 (VCAM-1), insulin-like growth factor-1 (IGF-1), and monocyte chemotactic protein-1 (MCP-1) were measured by enzyme-linked immunosorbent assay (ELISA). Fasting blood glucose, blood lipids, hemorheological parameters, and coagulation function were analyzed using an automatic biochemical analyzer. Vascular ultrasound and hematoxylin-eosin (HE) staining were used to evaluate vascular lesions. ResultsIn terms of syndrome manifestations, compared with the blank group, body weight increased rapidly during the first 5 weeks in the model, Qi and Yin deficiency, and counter-syndrome groups. After STZ injection combined with Yin-depleting herbal administration at week 5, body weight decreased significantly (P<0.01) and continued to decline until the end of the experiment. Rats exhibited decreased activity, irritability, coarse and yellowish fur with obvious shedding, polydipsia, polyphagia, frequent urination, and dry stools, which were most pronounced in the Qi and Yin deficiency group. Grip strength decreased, peak activity time occurred earlier, total distance in the open-field test was reduced, and residence time was prolonged. Precordial temperature decreased (P<0.01), while paw temperature increased (P<0.05), and skin moisture and oil content were reduced (P<0.05, P<0.01). In terms of disease-related indicators, compared with the blank group, fasting blood glucose was significantly increased (>16.7 mmol·L-1) in the model and Qi and Yin deficiency groups, and blood lipid levels were significantly elevated (P<0.05). Vascular-related factors ET-1, MCP-1, VCAM-1, and VEGF were significantly increased (P<0.05,P<0.01), while IGF-1 was significantly decreased (P<0.01). Pathological examination of the aortic valve showed valvular thickening and structural disorganization. Carotid artery examination revealed discontinuity of the intima, foam cell accumulation beneath the intima, disordered smooth muscle arrangement, and widened intercellular spaces. Compared with the model group, ET-1, MCP-1, and VEGF levels were significantly decreased in both the Qi and Yin deficiency group and the counter-syndrome group. The reductions in ET-1 and MCP-1 were more pronounced in the Qi and Yin deficiency group (P<0.01), while the decrease in VCAM-1 was more significant in the counter-syndrome group (P<0.05). Compared with the blank group, the Qi and Yin deficiency group showed significantly prolonged activated partial thromboplastin time (APTT), thrombin time (TT), and prothrombin time (PT) (P<0.01). The erythrocyte deformability index (TK), erythrocyte sedimentation rate, erythrocyte electrophoresis index, and whole blood low-shear viscosity all showed increasing trends. Vascular ultrasound revealed reduced arterial blood flow velocity, increased vascular resistance, and intimal thickening without plaque formation. The aortic intima showed no obvious overall thickening, with only occasional localized thickening and foam cell presence, and carotid artery injury was observed. ConclusionA rat model of DMA with Qi and Yin deficiency syndrome was successfully established using high-fat diet feeding combined with STZ injection and Yin-depleting herbal administration. Shenqi compound formula effectively alleviated Qi and Yin deficiency syndrome, regulated glucose and lipid metabolism, improved hemorheological and coagulation function, reduced vascular lesion severity, and demonstrated potential for early prevention and treatment of DMA.
3.Expert consensus on the management of emergency medicines in medical institutions of Sichuan Province
Hua YANG ; Ting LUO ; Ruiyu WANG ; Xia SHI ; Jinqi LI ; Xiuxia LI
China Pharmacy 2026;37(19):2485-2490
OBJECTIVE To establish a standardized management system for emergency medicines in medical institutions of Sichuan Province, so as to improve the timeliness, safety and accessibility of emergency medicine use.METHODS A multidisciplinary expert team consisting of specialists in emergency medicine, pharmacy and nursing was set up. In accordance with evidence-based principles, relevant domestic and international policies, guidelines and literature were systematically sorted out. Combined with the results of investigations on the current situation of medical institutions at all levels within the province, multiple rounds of thematic seminars of the steering expert group were organized. The Delphi method was applied to carry out two rounds of expert questionnaire consultation. After item-by-item revision and final expert review, the Expert Consensus on the Management of Emergency Medicines in Medical Institutions of Sichuan Province (hereinafter referred to as the Consensus ) was finally developed.RESULTS&CONCLUSIONS This Consensus constructs a three-tier catalog allocation model of “basic standard configuration + specialty adaptation + emergency reserve”. A set of standardized management specifications were formulated covering the selection, stock reserve, storage and maintenance, clinical application, supply and allocation, quality control and training, and informatization management of emergency medicines. The Consensus can provide a practical basis for the standardized, homogeneous and refined management of emergency medicines in medical institutions of Sichuan Province, and help enhance the capacity of medication guarantee and the level of medical safety management for the treatment of critical and severe patients across the province.
4.Changes in Astronaut Brain Function and Behavior Associated With Habitation on Low-Earth-orbit Space Stations
Hong-Ting JIANG ; You-Fu LUO ; Zheng-Jiang YANG ; Yuan YAO ; De-Zhong YAO ; Ke CHEN
Progress in Biochemistry and Biophysics 2026;53(10):2786-2796
During habitation on low-Earth-orbit (LEO) space stations, astronauts are exposed to a combination of orbital microgravity, space radiation, an enclosed and artificially controlled cabin environment, altered sleep-wake rhythms, and sustained operational and psychosocial demands. These factors can modify sensorimotor inputs, body-fluid distribution, arousal state, and task-related neural processing, thereby affecting brain function and behavior. Because evidence from real spaceflight remains limited by small samples, heterogeneous mission durations, and different measurement time points, this review integrates findings from real human spaceflight with relevant ground-based analog studies while treating real orbital studies as the primary source of evidence. We focus on electroencephalography (EEG) and event-related potentials (ERPs), structural and functional neuroimaging, and sensorimotor and cognitive outcomes, with particular attention to the direction, anatomical distribution, temporal course, and possible physiological significance of the reported changes. EEG studies indicate that long-duration spaceflight is associated with increased resting-state beta activity, particularly in sensorimotor and frontotemporal regions, together with state-dependent alterations in beta-band functional connectivity. In contrast, alpha source power and functional connectivity associated with the default mode network are reduced during long-duration missions, and some of these effects may persist into the early postflight period. Task-related electrophysiological findings further suggest that sustained mental workload can weaken frontocentral theta-temporoparietal gamma phase-amplitude coupling, whereas in-flight decision-making is accompanied by reduced P300 amplitude and reorganization of feedback-related potentials. Short-duration missions, however, have shown relative preservation of posterior dominant rhythms and some ERP measures, indicating that mission duration, recording state, and task demands substantially influence the observed electrophysiological phenotype. Neuroimaging provides complementary evidence at structural and network levels. Long-duration spaceflight has been associated with upward brain displacement, ventricular and cerebrospinal fluid expansion, regional gray- and white-matter remodeling, and alterations in white-matter structural connectivity. Functional magnetic resonance imaging (fMRI) studies further indicate reorganization of vestibular-sensorimotor, visual, and default mode networks. Some network changes recover after return to Earth, whereas others may remain detectable for months. Importantly, most MRI measurements are obtained after landing rather than in orbit; therefore, postflight findings may reflect a mixture of in-flight adaptation, the rapid transition back to 1 g, and subsequent readaptation rather than a single spaceflight effect. Behavioral evidence is most consistent for sensorimotor function. Early after return, astronauts frequently show impaired postural control, gait, spatial orientation, and coordination, consistent with reweighting among vestibular, visual, and proprioceptive information. By comparison, simple cognition and some critical operational tasks are often preserved. More subtle or high-load processes-including sustained attention, feedback evaluation, temporal processing, error monitoring, and metacognitive calibration may be more sensitive than global cognitive performance. This dissociation between neural change and preserved behavior suggests that altered brain activity should not automatically be interpreted as functional deterioration. Integrating the available modalities, we propose that LEO space-station habitation is better characterized by system-specific and stage-dependent neural adaptation than by a generalized increase or decline in brain function. The most coherent cross-modal pattern involves sensorimotor reorganization: reduced gravitational reference and weight-bearing feedback under microgravity may drive reweighting of vestibular, visual, and proprioceptive inputs, accompanied by changes in beta activity and vestibular-sensorimotor networks and followed by transient postflight sensorimotor deficits. A second major process involves fluid-related structural remodeling, in which cephalad fluid shifts and altered hydrostatic gradients may contribute to changes in cerebrospinal fluid spaces, ventricular volume, and brain tissue configuration. Resting-state and cognitive electrophysiological changes likely represent additional adjustments in network regulation and resource allocation, but their functional interpretation remains more dependent on sleep, workload, recording conditions, and individual differences. Future studies should move beyond isolated pre-post comparisons and group averages toward standardized longitudinal designs spanning preflight, multiple in-flight time points, and postflight recovery. Synchronized assessment of brain function, behavior, sleep, and key environmental parameters should be used to characterize individual adaptation trajectories and determine which neural changes reflect successful compensation, which predict delayed recovery, and which have genuine value for brain-health risk prediction and individualized countermeasures.
5.Optimization of purification process and component analysis of alkaloids from Zanthoxylum bungeanum Maxim
Heying YANG ; Caiping LUO ; Ting PENG ; Wenyi LIANG ; Songzhang SHEN ; Juan SU
Journal of Pharmaceutical Practice and Service 2025;43(2):75-81
Objective To optimize the process conditions and analyze the components of alkaloids from Zanthoxylum bungeanum Maxim(Z. bungeanum)using macroporous resin. Methods Combining single factor tests and orthogonal tests, the content of hydroxy-α-sanshool(HAS)and hydroxy-β-sanshool(HBS)were considered as indexes to determine the best process parameters. Ultra-performance liquid chromatography-quadrupole tandem time-of-flight mass spectrometry(UPLC-Q-TOF-MSE)was used to identify the structures of alkaloids. Results The optimal conditions were Mitsubishi HP-20 macroporous resin, the loading solution concentration was 0.2 g crude drug/ml, the ratio of crude drug to resin volume was 1 g∶2.5 ml, the diameter/height ratio of resin column was 1∶7, the dynamic adsorption flow rate was 4 times of bed volume(BV)per hour, and the adsorption time was 1 h. Impurities were removed by using 2 BV of 20% ethanol, 5 BV of 80% ethanol was used to elution, and the content of HAS and HBS was 4.71% and 1.02%, respectively. A total of 20 alkaloids were identified from Z. bungeanum. Conclusion This method was stable and feasible, obtaining high purity and various kinds of alkaloids, which could be used for the enrichment and purification of alkaloids from Z. bungeanum.
6.Advances in the application of digital technology in orthodontic monitoring
WANG Qi ; LUO Ting ; LU Wei ; ZHAO Tingting ; HE Hong ; HUA Fang
Journal of Prevention and Treatment for Stomatological Diseases 2025;33(1):75-81
During orthodontic treatment, clinical monitoring of patients is a crucial factor in determining treatment success. It aids in timely problem detection and resolution, ensuring adherence to the intended treatment plan. In recent years, digital technology has increasingly permeated orthodontic clinical diagnosis and treatment, facilitating clinical decision-making, treatment planning, and follow-up monitoring. This review summarizes recent advancements in digital technology for monitoring orthodontic tooth movement, related complications, and appliance-wearing compliance. It aims to provide insights for researchers and clinicians to enhance the application of digital technology in orthodontics, improve treatment outcomes, and optimize patient experience. The digitization of diagnostic data and the visualization of dental models make chair-side follow-up monitoring more convenient, accurate, and efficient. At the same time, the emergence of remote monitoring technology allows orthodontists to promptly identify oral health issues in patients and take corresponding measures. Furthermore, the multimodal data fusion method offers valuable insights into the monitoring of the root-alveolar relationship. Artificial intelligence technology has made initial strides in automating the identification of orthodontic tooth movement, associated complications, and patient compliance evaluation. Sensors are effective tools for monitoring patient adherence and providing data-driven support for clinical decision-making. The application of digital technology in orthodontic monitoring holds great promise. However, challenges like technical bottlenecks, ethical considerations, and patient acceptance remain.
7.Role of SWI/SNF Chromatin Remodeling Complex in Tumor Drug Resistance
Gui-Zhen ZHU ; Qiao YE ; Yuan LUO ; Jie PENG ; Lu WANG ; Zhao-Ting YANG ; Feng-Sen DUAN ; Bing-Qian GUO ; Zhu-Song MEI ; Guang-Yun WANG
Progress in Biochemistry and Biophysics 2025;52(1):20-31
Tumor drug resistance is an important problem in the failure of chemotherapy and targeted drug therapy, which is a complex process involving chromatin remodeling. SWI/SNF is one of the most studied ATP-dependent chromatin remodeling complexes in tumorigenesis, which plays an important role in the coordination of chromatin structural stability, gene expression, and post-translation modification. However, its mechanism in tumor drug resistance has not been systematically combed. SWI/SNF can be divided into 3 types according to its subunit composition: BAF, PBAF, and ncBAF. These 3 subtypes all contain two mutually exclusive ATPase catalytic subunits (SMARCA2 or SMARCA4), core subunits (SMARCC1 and SMARCD1), and regulatory subunits (ARID1A, PBRM1, and ACTB, etc.), which can control gene expression by regulating chromatin structure. The change of SWI/SNF complex subunits is one of the important factors of tumor drug resistance and progress. SMARCA4 and ARID1A are the most widely studied subunits in tumor drug resistance. Low expression of SMARCA4 can lead to the deletion of the transcription inhibitor of the BCL2L1 gene in mantle cell lymphoma, which will result in transcription up-regulation and significant resistance to the combination therapy of ibrutinib and venetoclax. Low expression of SMARCA4 and high expression of SMARCA2 can activate the FGFR1-pERK1/2 signaling pathway in ovarian high-grade serous carcinoma cells, which induces the overexpression of anti-apoptosis gene BCL2 and results in carboplatin resistance. SMARCA4 deletion can up-regulate epithelial-mesenchymal transition (EMT) by activating YAP1 gene expression in triple-negative breast cancer. It can also reduce the expression of Ca2+ channel IP3R3 in ovarian and lung cancer, resulting in the transfer of Ca2+ needed to induce apoptosis from endoplasmic reticulum to mitochondria damage. Thus, these two tumors are resistant to cisplatin. It has been found that verteporfin can overcome the drug resistance induced by SMARCA4 deletion. However, this inhibitor has not been applied in clinical practice. Therefore, it is a promising research direction to develop SWI/SNF ATPase targeted drugs with high oral bioavailability to treat patients with tumor resistance induced by low expression or deletion of SMARCA4. ARID1A deletion can activate the expression of ANXA1 protein in HER2+ breast cancer cells or down-regulate the expression of progesterone receptor B protein in endometrial cancer cells. The drug resistance of these two tumor cells to trastuzumab or progesterone is induced by activating AKT pathway. ARID1A deletion in ovarian cancer can increase the expression of MRP2 protein and make it resistant to carboplatin and paclitaxel. ARID1A deletion also can up-regulate the phosphorylation levels of EGFR, ErbB2, and RAF1 oncogene proteins.The ErbB and VEGF pathway are activated and EMT is increased. As a result, lung adenocarcinoma is resistant to epidermal growth factor receptor tyrosine kinase inhibitors (EGFR-TKIs). Although great progress has been made in the research on the mechanism of SWI/SNF complex inducing tumor drug resistance, most of the research is still at the protein level. It is necessary to comprehensively and deeply explore the detailed mechanism of drug resistance from gene, transcription, protein, and metabolite levels by using multi-omics techniques, which can provide sufficient theoretical basis for the diagnosis and treatment of poor tumor prognosis caused by mutation or abnormal expression of SWI/SNF subunits in clinical practice.
8.Mechanism of total ginsenosides in alleviating myocardial injury in septic rat models by regulating SLC7A11/GPX4-mediated ferroptosis
Kefeng ZHANG ; Yicheng LIU ; Lin LUO ; Ting ZHANG
Journal of Clinical Medicine in Practice 2025;29(11):42-48
Objective To investigate the mechanism of total ginsenosides(TG)in alleviating myocardial injury in septic rat models by regulating solute carrier family 7 member 11/glutathione per-oxidase 4(SLC7 A1 1/GPX4)-mediated ferroptosis.Methods Ninety SPF-grade male rats were ran-domly divided into five groups:Sham group(sham operation),septic cardiomyopathy(SCM)group,TG40 group(SCM model rats gavaged with 40 mg/kg TG),TG160 group(SCM model rats gavaged with 160 mg/kg TG),and TG160+RSL3 group(SCM model rats gavaged with 160 mg/kg TG and intraperitoneally injected with 10 mg/kg ferroptosis inducer RSL3).The SCM model was established using the cecal ligation and puncture method.Cardiac function was assessed in each group.Hematox-ylin-eosin(HE)staining was performed to observe pathological changes in myocardial tissue.Levels of tumor necrosis factor(TNF)-α,interleukin(IL)-1 β,IL-6,creatine kinase-MB(CK-MB),myo-globin(Mb),and cardiac troponin I(cTnI)were measured by enzyme-linked immunosorbent assay.Protein expression levels of NADPH oxidase(NOX)1,NOX2,NOX4,SLC7A11,and GPX4 were detected by western blotting.Levels of Fe2+and total iron in myocardial tissue were also determined.Results Compared with the Sham group,the SCM group exhibited decreased left ventricular ejec-tion fraction(LVEF),left ventricular fractional shortening(LVFS),and protein expression of SLC7A11 and GPX4,along with increased levels of CK-MB,Mb,cTnI,TNF-α,IL-1β,IL-6,Fe2+,total iron,and protein expression of NOX1,NOX2,and NOX4(P<0.05).Compared with the SCM group,the TG40 and TG160 groups showed dose-dependent increases in LVEF,LVFS,and SLC7A11/GPX4 expression,as well as reductions in CK-MB,Mb,cTnI,TNF-α,IL-1 β,IL-6,Fe,total iron,and NOX1/NOX2/NOX4 expression(P<0.05).In contrast,the TG160+RSL3 group displayed lower LVEF,LVFS,and SLC7A11/GPX4 expression,and higher levels of the aforementioned biomarkers compared with the TG160 group(P<0.05).Conclusion TG sig-nificantly suppresses sepsis-induced myocardial inflammation and oxidative stress,improves cardiac function,and mitigates myocardial injury,likely by inhibiting ferroptosis via activation of the SLC7A11/GPX4 signaling pathway.
9.Analysis of the efficacy of transcutaneous acupoint electrical stimulation in the treatment of sequelae of inflammatory pelvic diseases in women
Mengyao Wang ; Ting Luo ; Ying Wang ; Zhaolian Wei
Acta Universitatis Medicinalis Anhui 2025;60(8):1535-1540
Objective:
To evaluate the clinical effectiveness of transcutaneous electrical acupoint stimulation (TEAS) in the treatment of sequelae of inflammatory pelvic diseases in women.
Methods:
A total of 100 patients diagnosed with sequelae of inflammatory pelvic diseases were selected . They were randomly divided into three groups : transcutaneous electrical acupoint stimulation (TEAS) treatment group (40 cases) , drug treatment group (30 cases) and combined treatment group (30 cases) . The three groups received treatment for four weeks : the medication group received Kangfu xiaoyan shuan ; the combination treatment group received TEAS combined with Kangfu xiaoyan shuan ; and the TEAS treatment group received the highest level of electrical stimulation that the human body could withstand via medium_low frequency pulsed electrotherapy instrument on the Guanyuan acupoints or the uterine acupoints . Prior to and following treatment , the three patient groups ’local sign score , symptom and sign score (McCormack score) , visual analogue scale ( VAS) score for lower abdomen pain , and SF_36 scale score were observed . Additionally , the three groups ’incidence of adverse events was noted .
Results:
Following the intervention , all three groups ’local sign score , McCormack score , and VAS score for lower abdomen pain were considerably lower than they were before the intervention (P < 0. 05) . These three scores showed significant differences (P < 0. 05) between the combination treatment group and the TEAS treatment and drug treatment groups . The combined treatment group ’s scores were lower. The three groups ’total somatic health score and total mental health score before and after the intervention differed significantly (P < 0. 05) after the period of therapy. Additionally , the combined treatment group ’s total somatic health score and total mental health score were higher than those of the medication group . In all three groups , there were no notable negative reactions .
Conclusion
TEAS treatment is effective in relieving the symptoms of chronic pelvic pain due to the sequelae of inflammatory pelvic disease , and the combination of medication is better than monotherapy in improving pain symptoms and quality of life . Key words sequelae of inflammatory pelvic diseases ; chronic pelvic pain ; transcutaneous electrical acupoint stimulation ; randomized controlled trial;clinical efficacy
10.Ursodeoxycholic acid inhibits the uptake of cystine through SLC7A11 and impairs de novo synthesis of glutathione
Fu'an XIE ; Yujia NIU ; Xiaobing CHEN ; Xu KONG ; Guangting YAN ; Aobo ZHUANG ; Xi LI ; Lanlan LIAN ; Dongmei QIN ; Quan ZHANG ; Ruyi ZHANG ; Kunrong YANG ; Xiaogang XIA ; Kun CHEN ; Mengmeng XIAO ; Chunkang YANG ; Ting WU ; Ye SHEN ; Chundong YU ; Chenghua LUO ; Shu-Hai LIN ; Wengang LI
Journal of Pharmaceutical Analysis 2025;15(1):189-207
Ursodeoxycholic acid(UDCA)is a naturally occurring,low-toxicity,and hydrophilic bile acid(BA)in the human body that is converted by intestinal flora using primary BA.Solute carrier family 7 member 11(SLC7A11)functions to uptake extracellular cystine in exchange for glutamate,and is highly expressed in a variety of human cancers.Retroperitoneal liposarcoma(RLPS)refers to liposarcoma originating from the retroperitoneal area.Lipidomics analysis revealed that UDCA was one of the most significantly down-regulated metabolites in sera of RIPS patients compared with healthy subjects.The augmentation of UDCA concentration(≥25 μg/mL)demonstrated a suppressive effect on the proliferation of liposarcoma cells.[15N2]-cystine and[13Cs]-glutamine isotope tracing revealed that UDCA impairs cystine uptake and glutathione(GSH)synthesis.Mechanistically,UDCA binds to the cystine transporter SLC7A11 to inhibit cystine uptake and impair GSH de novo synthesis,leading to reactive oxygen species(ROS)accumulation and mitochondrial oxidative damage.Furthermore,UDCA can promote the anti-cancer effects of ferroptosis inducers(Erastin,RSL3),the murine double minute 2(MDM2)inhibitors(Nutlin 3a,RG7112),cyclin dependent kinase 4(CDK4)inhibitor(Abemaciclib),and glutaminase inhibitor(CB839).Together,UDCA functions as a cystine exchange factor that binds to SLC7A11 for antitumor activity,and SLC7A11 is not only a new transporter for BA but also a clinically applicable target for UDCA.More importantly,in combination with other antitumor chemotherapy or physiotherapy treatments,UDCA may provide effective and promising treatment strategies for RLPS or other types of tumors in a ROS-dependent manner.


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