ObjectiveTo investigate the mechanism by which Feixin decoction treats hypoxic pulmonary hypertension （HPH） by regulating the peroxisome proliferator-activated receptor gamma （PPARγ）/nuclear factor-kappa B （NF-κB）/NOD-like receptor pyrin domain containing 3 （NLRP3） signaling pathway. MethodsForty-eight male SD rats were randomly allocated into normal， hypoxia， and low-， medium- and high-dose （5.85， 11.7， 23.4 g·kg^-1， respectively） Feixin decoction groups， with 8 rats in each group. Except the normal group， the remaining five groups were placed in a hypoxia chamber with an oxygen concentration of （10.0±0.5）% for 8 h per day， 28 days， and administrated with corresponding drugs during the modeling process. After 4 weeks of treatment， echocardiographic parameters ［pulmonary artery acceleration time （PAT）， pulmonary artery ejection time （PET）， right ventricular anterior wall thickness （RVAWd）， and tricuspid annular plane systolic excursion （TAPSE）］ were measured for each group. The right ventricular systolic pressure （RVSP） was measured by the right heart catheterization method， and the right ventricular hypertrophy index （RVHI） was calculated by weighing the heart. The pathological changes in pulmonary arterioles were observed by hematoxylin-eosin staining. The co-localization of α-smooth muscle actin （α-SMA） with NLRP3， N-terminal gasdermin D （N-GSDMD）， and cysteinyl aspartate-specific proteinase-1 （Caspase-1） in pulmonary arteries was detected by immunofluorescence. The protein levels of PPARγ， NF-κB， NLRP3， apoptosis-associated speck-like protein containing a CARD （ASC）， N-GSDMD， interleukin-1β （IL-1β）， interleukin-18（IL-18）， and cleaved Caspase-1 in the lung tissue was determined by Western blot. The ultrastructural changes in pulmonary artery smooth muscle cells （PASMCs） were observed by transmission electron microscopy. ResultsCompared with the normal group， the hypoxia group showed increased RVSP and RVHI （P<0.01）， decreased right heart function （P<0.01）， increased pulmonary vascular remodeling （P<0.01）， increased co-localization of α-SMA with NLRP3， N-GSDMD， and Caspase-1 in pulmonary arterioles （P<0.01）， up-regulated protein levels of NF-κB， NLRP3， ASC， N-GSDMD， IL-1β， IL-18， and cleaved Caspase-1 in the lung tissue （P<0.05， P<0.01）， a down-regulated protein level of PPARγ （P<0.05， P<0.01）， and pyroptosis in PASMCs. Compared with the hypoxia group， Feixin decoction reduced RVSP and RVHI， improved the right heart function and ameliorated pulmonary vascular remodeling （P<0.05， P<0.01）， decreased the co-localization of α-SMA with NLRP3， N-GSDMD， and Caspase-1 （P<0.05， P<0.01）， down-regulated the protein levels of NF-κB， NLRP3， ASC， N-GSDMD， IL-1β， IL-18， and cleaved Caspase-1 in the lung tissue （P<0.05， P<0.01）， up-regulated the protein level of PPARγ （P<0.05， P<0.01）， and alleviated pyroptosis in PASMCs. ConclusionFeixin decoction can ameliorate pulmonary vascular remodeling and right heart dysfunction in chronically induced HPH rats by regulating pyroptosis in PASMCs through the PPARγ/NF-κB/NLRP3 pathway.

Acute ischemic stroke (AIS) is a cerebrovascular disease characterized by high morbidity, disability, and mortality, posing a significant threat to human health. Endovascular treatment has now been established as a key method for AIS management, in which stent retrievers that can mechanically remove blood clots play a key role in this technique. In recent years, stent retrievers have evolved in complexity and functionality to improve the ability of clot removing and surgical safety. However, the present instruments still have limitations on treatment efficiency, vascular adaptability, and operational precision, posing an urgent need for innovation in the design of stent retrievers. This paper systematically reviewed the structural features and working principles of AIS stent retrievers from the perspective of efficacy evaluation metrics, historical development, recent advancements in stent retrieval technology, and future prospects.
Humans ; Ischemic Stroke/surgery* ; Stents ; Endovascular Procedures/methods* ; Thrombectomy/methods* ; Device Removal/methods*

Objective:To discuss the effect of fluid resuscitation on the occurrence of ferroptosis in vascular tissue and the structure of vascular cells in the rats with blast injury complicated with hemorrhagic shock,and to clarify its mechanism.Methods:A total of 54 healthy adult SD rats were randomly divided into normal group,blast injury complicated with hemorrhagic shock(model)group,and the fluid resuscitation(treatment)group,and there were 18 rats in each group.Among them,10 rats were randomly selected to observe the surival status and another 8 rats were selected to detect the other indexes.The average survival time(ST),24 h and 72 h survival rates of the rats in various groups were observed;the blood pressure(BP),heart rate(HR),and respiratory rate(RR)of the rats in various groups were observed;the levels of serum creatinine(Scr),blood urea nitrogen(BUN),lactate(LAC),glucose(GLU),iron ions,glutathione(GSH),and malondialdehyde(MDA)and the activities of aspartate aminotransferase(AST),alanine aminotransferase(ALT)and lactate dehydrogenase(LDH)in serum of the rats in various groups were detected;Western blotting method was used to detect the expression levels of ferroptosis marker proteins glutathione peroxidase 4(GPX4),solute carrier family 7 member 11(SLC7A11),and heme oxygenase 1(HO-1)proteins in superior mesenteric artery tissue of the rats in various groups;the pathomorphology of the superior mesenteric artery of the rats in various groups was observed.Results:All the rats in normal group survived for 72 h,while the longest ST of the rats in model group did not exceed 9 h.Compared with model group,the ST and 24 h survival rate(SR)of the rats in treatment group were significantly increased(P＜0.05).Compared with normal group,the BP,HR,and RR of the rats in model group were significantly decreased(P＜0.01).Compared with model group,the BP,HR,and RR of the rats in treatment group were significantly increased after fluid resuscitation(P＜0.05).Compared with normal group,the activities of AST and ALT,and the levels of Scr and BUN in serum of the rats in model group were significantly increased(P＜0.01).Compared with model group,the serum levels of LAC and GLU of the rats in treatment group were significantly decreased(P＜0.01).Compared with normal group,the concentration of iron ion,GSH level,MDA level,LDH activity in serum of the rats in model group were significantly increased(P＜0.05);compared with model group,the concentration of iron ion and LDH activity in serum of the rats in treatment group was significantly decreased(P＜0.01).Compared with normal group,the expression levels of GPX4 and SLC7A11 in superior mesenteric artery tissue of the rats in model group were significantly decreased(P＜0.05);compared with model group,the expression levels of GPX4 and SLC7A11 in superior mesenteric artery tissue of the rats in treatment group were significantly increased(P＜0.05).Compared with normal group,the expression level of HO-1 protein in superior mesenteric artery tissue of the rats in model group was increased(P＜0.01);compared with model group,the expression level of HO-1 protein in superior mesenteric artery tissue of the rats in treatment group was increased(P＜0.01).The microscopic pathology results showed that the cell arrangement in the layers of the superior mesenteric artery tissue of the rats in model group was disordered,the swelling was significant and the thickness was increased;the pathological changes in superior mesenteric artery tissue of the rats in treatment group was alleviated.The ultramicroscopic pathology results showed that the endothelial cell structure of blood vessels of the rats in normal group was intact,and there was no swelling in the subendothelial matrix;the vascular endothelial cell membrane of the rats in model group was damaged,there were cytoplasmic dissolution and fragmentation,and the swelling of the subendothelial matrix was significant;the swelling of the vascular endothelial cells in treatment group was alleviated.Conclusion:Ferroptosis occurs in vascular tissue of the rats with blast injury complicated with hemorrhagic shock,and fluid resuscitation can alleviate the structural damage of the vascular cells by inhibiting the vascular tissue ferroptosis.

Objective To assess the efficacy of pirfenidone combined with PD-L1 inhibitor for treatment of bladder cancer in a mouse model and its effect on tumor immune microenvironment modulation.Methods Forty C57BL/6 mouse models bearing ectopic human bladder cancer xenografts were randomized into control group,PD-L1 inhibitor group,pirfenidone group and combined treatment group(n=10).After successful modeling,PD-L1 inhibitor treatment was administered via intraperitoneal injection at 12.5 mg/kg every 3 days,and oral pirfenidone(500 mg/kg)was given on a daily basis.The survival rate of the mice and tumor growth rate were compared among the 4 groups.The expressions of CD3,CD8,CD45,E-cadherin and N-cadherin in the tumor tissues were detected with immunohistochemistry after the 21-day treatment,and bone marrow-derived suppressor cells(MDSCs)were observed with immunofluorescence staining;serum levels of alanine aminotransferase(ALT),aspartate aminotransferase(AST),urea nitrogen(BUN),creatinine(CRE)and lactate dehydrogenase(LDH-L)were analyzed using an automated biochemical analyzer.Results Treatment with PD-L1 inhibitor and pirfenidone alone both significantly decreased tumor growth rate and tumor volume at 21 days(P<0.05),but the combined treatment produced an obviously stronger inhibitory effect(P<0.05).PD-L1 inhibitor and pirfenidone alone significantly increased E-cadherin expression and decreased N-cadherin expression in the tumor tissue(P<0.05).The two treatments both significantly increased the percentage of CD3+,CD8 and CD45+ T cells and decreased the percentage of Ly-6G+CD11b+MDSCs in the tumor tissue,and these changes were more obvious in the combined treatment group(P<0.05).No significant differences were found in serum ALT,AST,BUN,CRE or LDH-L levels among the 4 groups(P>0.05).Conclusion Combined treatment with pirfenidone and PD-L1 inhibitor significantly inhibits the progression of bladder cancer in mice possibly by regulating tumor immune microenvironment and inhibiting epithelial-mesenchymal transition of the tumor cells.

Objective To assess the efficacy of pirfenidone combined with PD-L1 inhibitor for treatment of bladder cancer in a mouse model and its effect on tumor immune microenvironment modulation.Methods Forty C57BL/6 mouse models bearing ectopic human bladder cancer xenografts were randomized into control group,PD-L1 inhibitor group,pirfenidone group and combined treatment group(n=10).After successful modeling,PD-L1 inhibitor treatment was administered via intraperitoneal injection at 12.5 mg/kg every 3 days,and oral pirfenidone(500 mg/kg)was given on a daily basis.The survival rate of the mice and tumor growth rate were compared among the 4 groups.The expressions of CD3,CD8,CD45,E-cadherin and N-cadherin in the tumor tissues were detected with immunohistochemistry after the 21-day treatment,and bone marrow-derived suppressor cells(MDSCs)were observed with immunofluorescence staining;serum levels of alanine aminotransferase(ALT),aspartate aminotransferase(AST),urea nitrogen(BUN),creatinine(CRE)and lactate dehydrogenase(LDH-L)were analyzed using an automated biochemical analyzer.Results Treatment with PD-L1 inhibitor and pirfenidone alone both significantly decreased tumor growth rate and tumor volume at 21 days(P<0.05),but the combined treatment produced an obviously stronger inhibitory effect(P<0.05).PD-L1 inhibitor and pirfenidone alone significantly increased E-cadherin expression and decreased N-cadherin expression in the tumor tissue(P<0.05).The two treatments both significantly increased the percentage of CD3+,CD8 and CD45+ T cells and decreased the percentage of Ly-6G+CD11b+MDSCs in the tumor tissue,and these changes were more obvious in the combined treatment group(P<0.05).No significant differences were found in serum ALT,AST,BUN,CRE or LDH-L levels among the 4 groups(P>0.05).Conclusion Combined treatment with pirfenidone and PD-L1 inhibitor significantly inhibits the progression of bladder cancer in mice possibly by regulating tumor immune microenvironment and inhibiting epithelial-mesenchymal transition of the tumor cells.

OBJECTIVE To provide a reference for the adjustment of antibacterial drug regimens， identification of adverse reactions， and personalized pharmaceutical care for patients with bullous pemphigoid and pulmonary aspergillosis combined with disseminated Nocardia farcinica infection. METHODS Clinical pharmacists participated in the entire treatment process of a patient with bullous pemphigoid and pulmonary aspergillosis combined with disseminated N. farcinica infection. Evidence-based medicine was used to assist in the selection of an initial combined drug regimen against nocardiosis， and timely communication with the microbiology laboratory to provide early antimicrobial susceptibility data. When the patient exhibited epilepsy， the suspected drugs were identified， and it was reminded that imipenem-cilastatin sodium could affect the efficacy of valproic acid. It was suggested to replace valproic acid with levetiracetam for anti-epileptic treatment and to discontinue imipenem-cilastatin sodium. During treatment， it was recommended to monitor the blood concentrations of voriconazole and linezolid， and assist in adjusting the dosage promptly based on the monitoring results. RESULTS The physicians accepted the recommendations of the clinical pharmacists. The patient’s condition improved， and they were discharged with medication. CONCLUSIONS Based on evidence-based medical evidence， antimicrobial susceptibility test results， and blood concentration monitoring data， clinical pharmacists assist clinicians in selecting a sensitive anti-infective regimen for the patient， identifying adverse reactions， adjusting the treatment regimen and providing full-course medication monitoring to ensure the safety and efficacy of clinical drug therapy.

AIM: To investigate the relationship between vascular smooth muscle cell (VSMC) injury, organelle stress response and autophagic cell death (autophagy) and ferroptosis induced by the chemical hypoxia inducer cobalt chloride (CoCl2) through the bioinformatics analysis and in vitro cell experimentation. METHODS: The dataset GSE119226 of VSMC treated with cobalt chloride was acquired from the gene expression database (GEO). The R language was used to investigate the relationship between CoCl2 treatment and organelle stress response (Golgi stress, endoplasmic reticulum stress) and two forms of cell death (ferroptosis and autophagic cell death). With primary cultured rat VSMC (rVSMC) and CoCl2-induced anoxia model, the changes in cell viability were detected by CCK-8 method, and reactive oxygen species (ROS) levels were measured using DCFH-DA method. The expression levels of HIF-1α (a key molecule in hypoxia), Golgi stress markers GM130 and p115, endoplasmic reticulum stress markers GRP78 and CHOP, autophagy markers LC3-II / LC3-I and Beclin1, and ferroptosis markers GPx4 and xCT were detected by Western blot. The effect of inducing or inhibiting organelle stress and cell death on the CoCl2-induced cell damage was also observed. RESULTS: Differentially expressed genes analysis of GSE119226 dataset showed that CoCl2 treatment of VSMCs had significant effects on organelle function and stress response, autophagy and ferroptosis-related genes, in which endoplasmic reticulum stress, protein processing in endoplasmic reticulum, regulation of Golgi to plasma membrane protein transport, autophagy / autophagic cell death, and ferroptosis pathways were remarkably enriched. The results of in vitro experiment showed that compared with normal rVSMC, cell viability was significantly decreased after CoCl2 treatment, as well as HIF-1α protein expression and ROS levels in rVSMCs were increased. In rVSMC treated with Co-Cl2, the expression levels of Golgi structural proteins GM130 and p115 (reflecting the occurrence of Golgi stress) were decreased, while the markers GRP78 and CHOP (reflecting the occurrence of endoplasmic reticulum stress) were increased. At the same time, CoCl2 treatment also reduced the expression of autophagy markers LC3-II/LC3-I and Beclin1 (indicating the decrease levels of autophagy), while the expression of ferroptosis markers GPx4 and xCT were decreased (indicating the occurrence of ferroptosis). Compared with CoCl2 treatment group, induced Golgi stress, endoplasmic reticulum stress, or ferroptosis could further reduce cell viability, while inhibition of these processes could improve cell viability. On the other hand, increasing the level of autophagy can improve the cell viability. CONCLUSION: Hypoxia induced by cobalt chloride can lead to VSMC injury. Golgi stress, endoplasmic reticulum stress, ferroptosis, and the reduction of autophagy level play an important role in it. Inhibition of organelle stress response and ferroptosis, or increase of autophagy level can improve VSMC injury caused by cobalt chloride.

AIM:To observe the effect of icariin-astragaloside Ⅳ-puerarin mixture(Yin-Huang-Ge mixture,YHG)on cognitive function and ferroptosis amino acid metabolism pathway in hepcidin(HAMP)knockout APPswe/PS1dE9(APP/PS1 HAMP-/-)mice.METHODS:The mice were divided into 7 groups:negative control(C57BL/6 mice)group,APP/PS1 group,APP/PS1 HAMP-/-group,APP/PS1+YHG group,APP/PS1 HAMP-/-+YHG group,APP/PS1+de-ferasirox(DFX)group,and APP/PS1 HAMP-/-+DFX group,with 6 mice in each group.The YHG and DFX were adminis-tered intragastrically,while the mice in C57 group,APP/PS1 group and APP/PS1 HAMP-/-group were given intragastric administration of distilled water,once a day for 2 months.The iron content in mouse brain tissues was detected by tissue iron kit.The morphological changes of the mitochondria in hippocampal neurons were observed by transmission electron microscopy.Morris water maze was used to detect the learning and memory ability of the mice.The content of neuronal nu-clear antigen(NeuN)in mouse brain tissues was detected by immunofluorescence staining.The expression of glutathione(GSH)in mouse brain tissues was detected by biochemical kit.The expression levels of glutamate-cysteine ligase catalytic subunit(GCLC)and glutamatase 2(GLS2)in mouse brain tissues were detected by Western blot.RESULTS:Compared with C57BL/6 mice,the brain iron content of APP/PS1 mice was significantly increased(P＜0.01),the mitochondria were seriously damaged,the learning and memory ability was significantly decreased(P＜0.05),the brain neurons were seri-ously damaged(P＜0.01),and the expression levels of GSH,GCLC and GLS2 were significantly decreased(P＜0.01).Compared with APP/PS1 mice,the brain iron content of APP/PS1 HAMP-/-mice was significantly increased(P＜0.01),the mitochondria were seriously damaged,the learning and memory ability was significantly decreased(P＜0.05),the brain neurons were seriously damaged(P＜0.01),and the expression levels of GSH,GCLC and GLS2 were significantly decreased(P＜0.05).After treatment with YHG and DFX,the brain iron content was significantly decreased(P＜0.01),the mitochondrial damage was alleviated,the learning and memory ability was significantly increased(P＜0.05),the brain neuron damage was alleviated(P＜0.01),and the expression levels of GSH,GCLC and GLS2 were significantly increased(P＜0.05).CONCLUSION:The YHG can improve the cognitive function of APP/PS1 HAMP-/-mice,and its mechanism may be related to the regulation of ferroptosis amino acid metabolism and the enhancement of antioxidant capacity.

Objective To explore the clinical effect and safety of remimazolam combined with alfentanil in painless gastroenteroscopy in elderly patients.Methods 188 elderly patients who were scheduled to undergo painless gastroenteroscopy from October 2021 to February 2023 were selected and divided into group A,group B,group C,and group D by random number table method,with 47 cases in each group.The group A,group B and group C were used remimazolam 0.2,0.3 and 0.4 mg/kg,and alfentanil 3 μg/kg respectively,and the remimazolam 2.5 mg/time was added during the operation.The group D was used propofol 1.5 mg/kg and alfentanil 3 μg/kg,and a single dose of propofol 0.5 mg/kg was added during the operation.The hemodynamics at different time points[3 min before anesthesia administration(T0),immediately after endoscopy(T1),3 min after endoscopy(T2),at the end of examination(T3),at the time of awakening(T4)],anesthesia onset time,sedation success rate,gastrointestinal endoscopy time,awakening time,time to leave the observation room and intraoperative/postoperative complications were compared,and the test results of neurobehavioral cognitive state examination(NCSE)were compared at different times.Results The percutaneous arterial oxygen saturation(SpO2)at T1 and T2 time point were higher than group C and group D,and the differences were statistically significant(P<0.05).There was no statistically significant difference in the heart rate(HR)and mean arterial pressure(MAP)among group A,group B,group C and group D at each time point(P>0.05).There was no statistically significant difference in SpO2 between group A and group B at each time point(P>0.05).There was no statistically significant difference in the success rate of sedation,gastrointestinal endoscopy examination time and time of leaving the observation room among the four groups(P>0.05),but the onset time of anesthesia in group A was longer than that in group B,group C and group D,and the awakening time in group A and group B was shorter than that in group C and group D,and the differences were statistically significant(P<0.05).There was no statistically significant difference in awakening time between group A and group B(P>0.05).The incidence rate of bradycardia in group A and group B was lower than in group D,and the incidence rates of hypoxemia,respiratory depression,hypotension,and dizziness in group A were lower than those in group D,and the incidence rate of injection pain in group A,group B and group C was lower than that in group D,and the differences were statistically significant(P<0.05).After 10 minutes of complete wakefulness,there was no statistically significant difference in the passing rates of calculation ability and the memory tests between group A and group B(P>0.05),but the passing rates of calculation ability and memory test in group A were higher than those in group C and group D,and the differences were statistically significant(P<0.05).Conclusion During painless gastroenteroscopy in elderly patients,the sedative effect of using 0.3 mg/kg remimazolam combined with alfentanil is good,and it has stable hemodynamics,and the occurrence rate of complications such as bradycardia and espiratory depression is low,and the early postoperative cognitive function is recovered well.