1.Development and evaluation of classification system for drug-related problems in China
Shuang ZOU ; Tingting LU ; Lei BAO ; Yun LIAO ; Ling LI ; Ping ZHANG
China Pharmacy 2026;37(3):371-376
OBJECTIVE To establish a Chinese drug-related problem (DRP) classification system applicable to pharmacist-led pharmaceutical care in China, providing pharmacists with an effective and practical tool for pharmaceutical care. METHODS A multi-stage process was employed to construct the DRP classification system, including literature review and analysis, comparison of existing classification systems, refinement of classification items and framework development, two rounds of standard case validation, expert discussion, and system revision. The Fleiss′ kappa test was used to calculate the consistency coefficient κ, assessing the reliability of pharmacists participating in evaluating the classification system. An electronic questionnaire comprising six items was employed to evaluate the system’s applicability. RESULTS The constructed Chinese DRP classification system comprised six sections [problem(including potential problems), DRP evaluation, cause (including possible causes of potential problems), intervention, acceptance of intervention and DRP status], with 24 primary codes and 96 secondary codes. In the first round of case validation, κ values exceeded 0.4 for all sections except “intervention” and “DRP status”. In the second round, κ values exceeded 0.4 for all sections. In the applicability evaluation of the classification system, positive ratings (“strongly agree” or “agree”) exceeded 85% for all items. Specifically, positive ratings for“the classification system can provide appropriate category selection”,“ the classification system is comprehensive”,“ the classification system is convenient to use” and “the classification system is highly satisfactory” exceeded 92%. CONCLUSIONS The Chinese DRP classification system developed demonstrates both high reliability and applicability, providing an effective and practical classification tool for pharmacists in China to conduct pharmaceutical care.
2.Study on the effect and mechanism of modified Yanghe decoction on bone destruction in rats with breast cancer bone metastasis
Shun LU ; Ang CAI ; Tingting FAN ; Weihua HE
China Pharmacy 2026;37(4):431-437
OBJECTIVE To explore the improvement effect and potential mechanism of modified Yanghe decoction on bone destruction in rats with breast cancer bone metastasis based on the receptor-interacting serine/threonine-protein kinase 1 (RIPK1)/RIPK3 pathway. METHODS The rat model of breast cancer bone metastasis was established by injecting a suspension of breast cancer cells into the bone marrow cavity. The rats with successful modeling were randomly divided into a model group (intragastric administration of equal volume of normal saline), modified Yanghe decoction low-, medium-, and high-dose groups (intragastric administration of corresponding decoction at 1.30, 2.60 and 5.20 g/kg, calculated by the dosage of crude drug), high-dose modified Yanghe decoction+si-RIPK1 group (intragastric administration of corresponding decoction at 5.20 g/kg, calculated by the dosage of crude drug; simultaneous injection of small interfering RNA for RIPK1 via the tail vein), and high-dose modified Yanghe decoction+si-NC group (intragastric administration of corresponding decoction at 5.20 g/kg, calculated by the dosage of crude drug; simultaneous injection of small interfering RNA for negative control via the tail vein), with 12 rats in each group. Another 12 healthy rats were selected as the control group and were given the same volume of normal saline intragastrically, once a day, for 14 consecutive days. Body weight was measured before administration and at the end of the last administration. The mechanical pain threshold and thermal pain threshold were measured, and the bone destruction, pathological changes and osteoclast formation of the tibia were observed. The positive expression of receptor activator of nuclear factor-κB (RANK) and receptor activator of nuclear factor-κB ligand (RANKL) in the tibial tissue, as well as the phosphorylation levels of RIPK1, RIPK3 and mixed lineage kinase domain-like protein (MLKL) were detected. RESULTS Compared with the control group, the tumor cells of tibia tissues in rats of the model group showed significant proliferation and diffuse infiltration into the bone marrow cavity. Extensive areas of tumor necrosis of cells, severe bone destruction, thinning of the bone cortex, and damage to the bone trabeculae were observed. The body weight (before administration and at the end of the last administration), mechanical pain threshold, thermal pain threshold, and the phosphorylation levels of RIPK1, RIPK3 and MLKL were decreased significantly; the tumor volume, the proportion of bone destruction area, the number of osteoclasts, and the positive expressions of RANK and RANKL were increased/up-regulated significantly (P<0.05). Compared with the model group, the above pathological changes in the tibial tissues of rats in modified Yanghe decoction low-, medium- and high-dose groups were all alleviated, and all quantitative indicators showed dose-dependent improvement (P<0.05). After silencing RIPK1, the aforementioned beneficial effects of high-dose modified Yanghe decoction were significantly weakened (P<0.05).CONCLUSIONSModified Yanghe decoction can alleviate bone destruction in rats with breast cancer bone metastasis. The above effect is related to the activation of the RIPK1/RIPK3 pathway.
3.Advances in the JAK2/STAT3 signaling pathway and its inhibitors in diffuse large B cell lymphoma
Chuanyang LU ; Qiuni CHEN ; Yuye SHI ; Yuan DENG ; Tingting JI ; Zhengyuan LIU ; Chunling WANG ; Liang YU
China Pharmacy 2026;37(5):682-688
Abnormal activation of the Janus kinase/signal transducer and activator of transcription (JAK/STAT) signaling pathway is involved in the pathogenesis of diffuse large B-cell lymphoma (DLBCL). In recent years, inhibitors targeting JAK2 and STAT3 have emerged as promising therapeutic candidates in DLBCL. This review summarizes the efficacy and safety profiles of JAK2 inhibitors (e.g., ruxolitinib) and STAT3 inhibitors (direct small-molecule inhibitors, the antisense oligonucleotide, and proteolysis targeting chimeras, etc.) in preclinical models and clinical trials. Accumulating evidence indicates that JAK2 and STAT3 inhibitors exhibit antitumor activity and are generally well tolerated in a subset of DLBCL patients. Meanwhile, the development of novel drug delivery systems has significantly enhanced the stability, bioavailability, and targeting ability of the compounds. Furthermore, JAK2 and STAT3 inhibitors may exhibit synergistic effects when combined with other therapy strategies (such as combinations with B-cell receptor signaling pathway inhibitors, immunomodulators, or other targeted drugs). However, current clinical applications are still in their early stages. Future research should concentrate on precision treatment strategies based on the genetic subtyping of DLBCL, and further refine the delivery systems for inhibitors as well as combination drug regimens to improve clinical outcomes.
4.Mechanism of Wendan Ningxin Granules in Modulating Diastolic Calcium Leakage-related Proteins to Improve Inflammation-associated Atrial Fibrillation Susceptibility
Biyue SHANG ; Tingting ZHU ; Shunxin LYU ; Zhiwei ZHANG ; Yufei WANG ; Xiangning CUI ; Yingdong LU
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(11):133-143
ObjectiveTo investigate the protective effect and mechanism of Wendan Ningxin granules (WNG) on susceptibility to atrial fibrillation (AF) in mice with inflammatory injury. Methods100 C57BL/6 mice were divided into a blank control group, a model group, a low-dose WNG group (2.34 g·kg-1·d-1), a high-dose WNG group (4.68 g·kg-1·d-1), and an amiodarone positive control group (0.091 g·kg-1·d-1), with 20 mice in each group. Except for the blank control group, mice in other groups received intraperitoneal injections of lipopolysaccharide (LPS) to establish an inflammatory injury model. Treatment groups received continuous intragastric administration of their respective interventions for four weeks. During the fourth week, the treatment groups received LPS injections concurrently with their treatments. The blank control and model groups received distilled water (10 mL·kg-1·d-1) by gavage, with a gavage volume of 10 mL·kg-1 for all groups, once daily. Hematoxylin-eosin (HE) staining and Sirius red staining were used to observe atrial tissue morphology and fibrosis degree. Immunohistochemistry was used to assess the expression of α-smooth muscle actin (α-SMA) in mouse atrial tissue. Electrophysiological detection was performed using a multi-channel electrophysiology mapping system to measure AF inducibility, AF duration, and atrial effective refractory period (AERP). High-resolution optical mapping was used to measure action potential duration (APD) dispersion, conduction heterogeneity index, and calcium transient (CaT) dispersion. Real-time quantitative polymerase chain reaction (Real-time PCR) was used to detect mRNA expression of proteins related to diastolic calcium leakage in mouse atria: Ca2+/calmodulin-dependent protein kinase Ⅱ(CaMKⅡ), ryanodine receptor 2(RyR2), sarco/endoplasmic reticulum Ca²⁺-ATPase (SERCA), and sodium-calcium exchanger (NCX). Western blot analysis was performed to detect the expression of CaMKII, RyR2, SERCA, and NCX proteins in myocardial tissue from each group. Enzyme-linked immunosorbent assay (ELISA) was used to measure serum levels of inflammatory factors interleukin-1β (IL-1β) and tumor necrosis factor-α (TNF-α). ResultsPathological staining results showed that compared with the blank control group, the model group exhibited disrupted atrial tissue structure, inflammatory cell infiltration, atrial fibrosis, and diffuse infiltration of numerous brown α-SMA positive cells in the atrial interstitium (P<0.01). AF could be induced by electrical stimulation with a longer duration. AERP was shortened, while APD dispersion, conduction heterogeneity index, and CaT dispersion were increased (P<0.01). The expression of proteins associated with diastolic calcium leakage, including CaMKⅡ, RyR2, and NCX1, showed elevated mRNA and protein levels, whereas SERCA2a mRNA and protein expression decreased (P<0.05). Serum levels of inflammatory factors IL-1β and TNF-α were elevated (P<0.01). Compared with the model group, intervention with WNG alleviated cardiac structural damage, reduced inflammatory cell infiltration, improved atrial fibrosis, and reduced the diffuse infiltration of α-SMA positive cells (P<0.01). AF inducibility and AF duration upon electrical stimulation were significantly reduced (P<0.05), AERP was prolonged (P<0.05), mRNA and protein expression of CaMKⅡ, RyR2, and NCX1-proteins associated with diastolic calcium leakage-were reduced, whilst mRNA and protein expression of SERCA2a increased (P<0.05), and serum levels of IL-1β and TNF-α were decreased (P<0.01). ConclusionBoth low‑ and high‑dose WNG can effectively reduce susceptibility to inflammation-related AF. The mechanism by which WNG reduce AF susceptibility may be related to regulating proteins involved in sarcoplasmic reticulum diastolic calcium leak, thereby improving cardiac electrical remodeling, and alleviating inflammation-induced myocardial fibrosis, thus improving cardiac structural remodeling.
5.Epidemiological characteristics of category C intestinal infectious diseases among children and adolescents in Shenzhen from 2012 to 2024 and the association with meteorological factors
Chinese Journal of School Health 2026;47(4):553-557
Objective:
To analyze the epidemiological characteristics of category C intestinal infectious diseases among children and adolescents in Shenzhen from 2012 to 2024 and the association with meteorological factors, so as to provide a scientific basis for the targeted prevention and control of infectious diseases for children and adolescents.
Methods:
Using data from the "Infectious Disease Reporting Information Management System" of the "China Disease Prevention and Control Information System" covering the period from January 1, 2012 to December 31, 2024, the study analyzed clinical and confirmed cases of hand, foot, and mouth disease, other infectious diarrhea, and acute hemorrhagic conjunctivitis among individuals aged 6-19 years old to describe demographic and temporal characteristics. It used Joinpoint regression to calculate the average annual percent change (AAPC) and annual percent change (APC) to analyze incidence trends, and Spearman s correlation was combined to generalize linear models so as to assess the association between category C intestinal infectious diseases and meteorological factors.
Results:
From 2012 to 2024, a cumulative total of 61 019 cases of hand, foot, and mouth disease among children and adolescents, 58 498 cases of other infectious diarrhea, and 6 377 cases of acute hemorrhagic conjunctivitis were reported. The AAPC in the incidence rates of these three diseases was 19.19%, 31.03% and 31.48 %, respectively(all P <0.05). Notably, the incidence of hand, foot, and mouth disease increased significantly after 2022 (APC= 133.66 %, P <0.01). The temporal distribution showed that hand,foot,and mouth disease was most prevalent in May,June and July (seasonal index of 2.39,3.64,1.97), other infectious diarrhea was most prevalent in February,March and December (seasonal index of 1.22,1.25,1.47), and acute hemorrhagic conjunctivitis peaked in September and October (seasonal index of 4.22,2.16). Monthly average temperature could increase the risk of hand,foot,and mouth disease( β = 0.18 ,95% CI =0.11-0.25); as monthly average wind speed increased, the incidence of other infectious diarrhea ( β =-0.86, 95% CI = -1.50 to -0.22) and acute hemorrhagic conjunctivitis ( β =-1.32, 95% CI =-2.60 to -0.05) both decreased (all P < 0.05 ).
Conclusions
Among children and adolescents in Shenzhen, category C intestinal infectious diseases remain prevalent throughout the year;the number of reported hand, foot, and mouth disease cases has shown an upward trend in recent years.Temperature and wind speed significantly affect the number of reported cases of three types with category C intestinal infectious diseases.
6.Impact of optimized varicella vaccination strategy on varicella incidence among nursery children in Shenzhen
Chinese Journal of School Health 2026;47(5):728-731
Objective:
To analyze the epidemiological characteristics of varicella among nursery children in Shenzhen from 2015 to 2024, and to evaluate the impact of optimizing varicella vaccine (VarV) immunization strategies on varicella incidence.
Methods:
Varicella incidence data for nursery children in Shenzhen from 2015 to 2024 were obtained from the China Disease Prevention and Control Information System. The study period was divided into three phases:one dose self pay VarV (January 2015 to October 2017), two dose self pay VarV (November 2017 to October 2019), and two dose free VarV (November 2019 to December 2024). Interrupted time series (ITS) analysis was conducted to assess changes in the level and trend of varicella incidence associated with each phase of policy implementation.
Results:
A total of 27 517 varicella cases was reported among nursery children from 2015 to 2024, with an average annual incidence of 514.01/100 000. During the same period, 136 clustered outbreaks were reported in nursery institutions, involving a cumulative total of 1 091 cases. ITS analysis showed that during the self pay 1 dose stage, the varicella incidence among nursery children showed an upward trend, with an average monthly increase of 2.58/100 000 (95% CI =2.21/ 100 000 -2.95/100 000, P <0.01). After the implementation of the self pay 2 dose strategy, the incidence decreased, with a change in incidence of -26.12/100 000 (95% CI =-37.30/100 000 to -14.94/100 000) and a change in slope of -2.65/100 000 (95% CI = -3.38/100 000 to -1.93/100 000)(all P <0.01). After the implementation of the free 2 dose strategy, the incidence decreased further, with a change in incidence of -40.03/100 000 (95% CI =-50.39/100 000 to -29.66/100 000, P <0.01) and a change in slope of -0.56/100 000 (95% CI =-1.20/100 000-0.08/100 000, P =0.09).
Conclusion
The gradual optimization of the VarV vaccination strategy in Shenzhen from self pay 1 dose to free 2 dose has significantly reduced the varicella incidence among nursery children, demonstrating good short term control and long term intervention effectiveness.
7.Effect of Modified Baoyuantang Combined with Linggui Zhugantang on Myocardial Mitochondrial Damage and NLRP3/GSDMD-mediated Pyroptosis in Rat Model of Post-myocardial Infarction Heart Failure
Tingting ZHU ; Lifei LYU ; Biyue SHANG ; Zhiwei ZHANG ; Shunxin LYU ; Yufei WANG ; Xiangning CUI ; Yingdong LU
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(17):1-12
ObjectiveTo investigate the therapeutic effects of modified Baoyuantang combined with Linggui Zhugantang on post-myocardial infarction heart failure in rats and its influence on NOD-like receptor pyrin domain-containing protein 3 (NLRP3)/gasdermin D (GSDMD)-mediated pyroptosis. MethodsSixty male SD rats were randomized into sham, model, low-, medium-, and high-dose (2.52, 5.04, 10.08 g·kg-1, respectively) modified Baoyuantang combined with Linggui Zhugantang, and sacubitril/valsartan sodium (0.021 g·kg-1) groups, with 10 rats in each group. Except the sham group, the other groups underwent left anterior descending coronary artery ligation for the modeling of myocardial infarction. The treatment groups were administrated with corresponding drugs by gavage, and the sham and model groups received an equal volume of normal saline. Administration began on the first day after successful modeling, once daily, for 4 weeks. Echocardiography was used to measure left ventricular ejection fraction (LVEF), left ventricular fractional shortening (LVFS), left ventricular end-diastolic and end-systolic diameters (LVIDd and LVIDs), left ventricular posterior wall thicknesses at end-diastole and end-systole (LVPWd, LVPWs), and left ventricular volumes at end-diastole and end-systole (LV Vold and LV Vols). Cardiac mass index and heart weight-to-tibia length ratio were calculated. Hematoxylin-eosin (HE) staining and Sirius Red staining were performed to observe myocardial morphology and collagen deposition. Immunohistochemistry was employed to detect the expression of type I collagen (Collagen Ⅰ), NLRP3, GSDMD, and interleukin-1β (IL-1β). Transmission electron microscopy was used to observe the mitochondrial ultrastructure. Tetramethylrhodamine methyl ester (TMRM) staining was conducted to assess mitochondrial membrane potential (MMP) in cardiomyocytes. Real-time PCR was used to quantify the mRNA levels of NLRP3, cysteinyl aspartate-specific proteinase-1 (Caspase-1), IL-1β, GSDMD, and interleukin-18 (IL-18) in the myocardial tissue. Western blotting was employed to determine the protein levels of NLRP3, Caspase-1, GSDMD, IL-1β, IL-18, nuclear factor kappa-B (NF-κB) p50, and NF-κB p65 in the myocardial tissue. Enzyme-linked immunosorbent assay (ELISA) was adopted to measure the serum levels of tumor necrosis factor-α (TNF-α), IL-1β, and IL-6. ResultsCompared with the sham group, the model group showed increased LVIDd, LVIDs, LV Vold, LV Vols, cardiac mass index, and heart weight-to-tibia length ratio (P<0.05), decreased LVPWs, LVEF, LVFS, and MMP (P<0.05), evident myocardial inflammation, fibrosis, and mitochondrial damage, upregulated expression of NLRP3, Caspase-1, GSDMD, IL-1β, IL-18, NF-κB p50, and NF-κB p65, and elevated serum levels of TNF-α, IL-1β, and IL-6 (P<0.05). Compared with the model group, modified Baoyuantang combined with Linggui Zhugantang reduced the LVIDd, LVIDs, LV Vols, cardiac mass index, and heart weight-to-tibia length ratio (P<0.05), increased the LVPWs, LVEF, LVFS, and MMP (P<0.05), alleviated myocardial inflammation and fibrosis, improved the mitochondrial structure and function, downregulated the expression of NLRP3, Caspase-1, GSDMD, IL-1β, IL-18, NF-κB p50, and NF-κB p65 (P<0.05), and reduced the serum levels of TNF-α, IL-1β, and IL-6 (P<0.05). ConclusionModified Baoyuantang combined with Linggui Zhugantang can ameliorate post-myocardial infarction ventricular remodeling and improve the cardiac function by reducing mitochondrial damage and inhibiting NLRP3/GSDMD-mediated pyroptosis.
8.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.
9.Effects of long non-coding RNA KIAA0125 on proliferation and apoptosis of acute myeloid leukemia U937 cells
Huali HU ; Fahua DENG ; Yuancheng LIU ; Siqi WANG ; Jingxin ZHANG ; Tingting LU ; Hai HUANG ; Sixi WEI
Chinese Journal of Tissue Engineering Research 2025;29(19):3983-3991
BACKGROUND:U937 cells can be used as a cell model for studying the biological characteristics,signaling pathways,and therapeutic targets of acute myeloid leukemia.Although it has been reported that long non-coding RNA KIAA0125 is highly expressed in acute myeloid leukemia,its biological function in U937 cells remains unclear,and its mechanism of action in the occurrence and development of acute myeloid leukemia needs to be further clarified. OBJECTIVE:To investigate the expression level of long non-coding RNA KIAA0125 in peripheral blood of patients with acute myeloid leukemia and its effect on the proliferation and apoptosis of U937 cells. METHODS:RNA-sequencing was used to analyze the bone marrow monocyte samples from acute myeloid leukemia patients,and the differentially expressed gene long non-coding RNA KIAA0125 was screened.The expression of long non-coding RNA KIAA0125 in peripheral blood of patients with acute myeloid leukemia was detected by qRT-PCR.The relationship between long non-coding RNA KIAA0125 mRNA expression and prognosis in bone marrow cells of 173 acute myeloid leukemia patients and 70 healthy people was statistically analyzed by GEPIA database.Subsequently,recombinant lentivirus technology and CRISPR/Cas9-SAM technology were used to construct U937 cell lines with knockdown/overexpression of long non-coding RNA KIAA0125.qRT-PCR was used to detect the knockdown/overexpression efficiency of long non-coding RNA KIAA0125.Next,CCK-8 assay,flow cytometry,and western blot assay were used to detect the effects of knockdown/overexpression of long non-coding RNA KIAA0125 on the proliferation and apoptosis of U937 cells.Finally,western blot assay was used to detect the effect of knockdown/overexpressed long non-coding RNA KIAA0125 on Wnt/β-catenin signaling pathway-related proteins. RESULTS AND CONCLUSION:(1)The results of qRT-PCR showed that long non-coding RNA KIAA0125 was highly expressed in peripheral blood of acute myeloid leukemia patients.The results of GEPIA database showed that long non-coding RNA KIAA0125 was highly expressed in bone marrow cells of acute myeloid leukemia patients,and the high expression group had worse overall survival.(2)The knockdown efficiency of long non-coding RNA KIAA0125 in knockdown group was 70%,and the U937 cells that stably down-regulated long non-coding RNA KIAA0125 expression were successfully constructed.The expression of long non-coding RNA KIAA0125 in overexpression group was four times that of vector group,and stable U937 cells were successfully constructed.(3)Knockdown of long non-coding RNA KIAA0125 inhibited the proliferation of U937 cells and promoted their apoptosis.Overexpression of long non-coding RNA KIAA0125 promoted the proliferation of U937 cells but had no significant effect on the apoptosis of U937 cells.(4)Knockdown of long non-coding RNA KIAA0125 inhibited the activity of Wnt/β-catenin signaling pathway,while overexpression of long non-coding RNA KIAA0125 activated Wnt/β-catenin signaling pathway.These results confirm that long non-coding RNA KIAA0125 is highly expressed in acute myeloid leukemia peripheral blood.Long non-coding RNA KIAA0125 may affect the proliferation and apoptosis of U937 cells by regulating the Wnt/β-catenin signaling pathway,and may be a potential prognostic marker for acute myeloid leukemia.
10.Baicalein mitigates ferroptosis of neurons after subarachnoid hemorrhage
Ting ZHU ; Tingting YUE ; Yue CUI ; Yue LU ; Wei LI ; Chunhua HANG
Chinese Journal of Tissue Engineering Research 2025;29(1):52-57
BACKGROUND:Ferroptosis is a mode of programmed cell death distinct from apoptosis,necrosis,and other novel cellular deaths,which occurs mainly due to accumulated lipid peroxidation.Ferroptosis has been shown to be involved in the pathological process following subarachnoid hemorrhage.Baicalein,serving as an adept sequestered of iron,evinces its prowess by quelling lipid peroxidative cascades.Nonetheless,the enigma lingers as to whether baicalein possesses the capacity to ameliorate neuronal ferroptosis,elicited in the wake of early brain injury after subarachnoid hemorrhage. OBJECTIVE:To investigate the effect and mechanism of baicalein on neuronal ferroptosis after subarachnoid hemorrhage. METHODS:Primary neuronal cells were extracted from C57BL/6L fetal mice at 16-17 days of gestation.Hemoglobin was used to stimulate primary neuronal cells to simulate an in vitro subarachnoid hemorrhage model.The viability of primary neuronal cells treated with baicalein at concentrations of 5,15,25,50,and 100 μmol/L for 24 hours was detected by CCK-8 assay to determine the optimal concentration of baicalein.Primary neuronal cells were divided into control group,hemoglobin group,and hemoglobin+baicalein group.The levels of reactive oxygen species and malondialdehyde in cells were detected by kits.The mRNA expressions of ferroptosis-related markers PTGS2,SLC7A11,and glutathione peroxidase 4 were detected by RT-PCR.The primary neuronal cells were further divided into control group,SLC7A11 inhibitor Erastin group,hemoglobin group,hemoglobin+baicalein group,and hemoglobin+baicalein+Erastin group.The expression of the ferroptosis related markers SLC7A11 and glutathione peroxidase 4 was detected by western blot assay. RESULTS AND CONCLUSION:(1)Baicalein(25 μmol/L)was selected as the following experimental concentration.(2)Compared with the hemoglobin group,the level of malondialdehyde and the level of reactive oxygen species were significantly decreased(P<0.05)in the hemoglobin+baicalein group.(3)Compared with the hemoglobin group,the mRNA expression of PTGS2 significantly decreased,and the mRNA expression of SLC7A11 and glutathione peroxidase 4 significantly increased(P<0.000 1)in the hemoglobin+baicalein group.(4)SLC7A11 inhibitor Erastin could reverse the baicalin-improved ferroptosis effect to a certain extent(P<0.05).(5)The results showed that baicalein could alleviate the ferroptosis of neuronal cells after subarachnoid hemorrhage through the SLC7A11/GPX4 pathway.


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