AIM To investigate effects of petroleum ether fraction from Derris eriocarpa How on glucose and lipid metabolism in a mouse model of metabolic syndrome(MS).METHODS KM mice were fed a high-fat diet and administered streptozotocin intraperitoneally to establish MS models.The MS mice were then randomly assigned to the model group,the metformin hydrochloride group,the lovastatin group,the ursolic acid group,and the high-,medium-and low-dose D.eriocarpa petroleum ether fraction groups,with 10 mice in each group.Ten additional mice maitained on a normal diet served as the normal control group.After 4 weeks of intragastric administration,glucose and lipid metabolism indicators were measured.Hepatic pathological changes were assessed using HE staining and oil red O staining.Liver tissue mRNA expressions of ATF3,PEPCK,FXR,CYP7A1,HNF4ɑ,CYP8B1 and SRB1 were quantified by RT-qPCR.Hepatic protein expressions of ATF3,HNF4ɑ,PEPCK,FXR and CYP7A1 was analyzed by Western blot in MS mice.RESULTS Compared to the model group,the high-dose D.eriocarpa petroleum ether fraction group exhibited significant glucose tolerance improvement(reduced OGTT-AUC,P＜0.01);favorable serum lipid modulation in terms of increased HDL-C levels(P＜0.01)and decreased TG,TC,LDL-C(P＜0.01);reduced renal biomarkers(BUN,SCR)and hepatotoxic indicators of TBA,AST and ALT activities(P＜0.01);alleviated hepatic lipid accumulation and histopathological damage;downregulated mRNA and protein expressions of ATF3,HNF4ɑ and PEPCK,as well as CYP8B1 mRNA expression(P＜0.01);and upregulated mRNA and protein expressions of FXR and CYP7A1,along with SRB1 mRNA expression(P＜0.01).CONCLUSION D.eriocarpa petroleum ether fraction ameliorates glucose and lipid metabolism dysregulation in MS mice by modulating the ATF3/HNF4ɑ/CYP7A1 signaling pathway,consequently eliciting hypoglycemic,hypolipidemic,hepatoprotective and nephroprotective effects.

Monoamine neurotransmitters mainly include serotonin,dopamine,epinephrine,and norepinephrine.They play an indispensable regulatory role in key physiological activities such as emotion,sleep,and memory within the central nervous system.Precise detection of these neurotransmitters holds great significance in the field of neuroscience research.Detection methods for monoamine neurotransmitters encompass high-performance liquid chromatography,mass spectrometry,capillary electrophoresis,fluorescence spectroscopy,and electrochemical methods,etc.Compared with other methods,electrochemical methods offer advantages such as high sensitivity,good selectivity,low cost,strong portability,convenient operation,and capability for in vivo real-time detection.This article reviewed recent research progress in electrochemical detection of monoamine neurotransmitters,focusing on a retrospective and summary from three aspects:sensor electrode materials,detection of various monoamine neurotransmitters,and in vivo real-time analysis.Furthermore,the future development of electrochemical sensors for monoamine neurotransmitters was prospected.

In-fusion cloning technology,as a revolutionary and efficient molecular biology tool,has been applied in multiple research fields such as basic biology,biotechnology,and biomedicine.In this article,we introduce a teaching reform project suitable for undergraduate students in the course of"Molecular Bi-ology Laboratory",which utilizes in-Fusion cloning technology to construct a prokaryotic expression vector for alkaline phosphatase mutant genes.Through specific teaching cases,we systematically explored the design and implementation of experimental projects,and focused on analyzing the key and difficult points of the teaching content.Our teaching practice has found that the implementation of this educational re-form project has achieved very good results in enhancing students' core biological literacy,bioinformatics skills,research thinking,and innovation abilities.At the same time,the application of this technology can significantly improve the quality of experimental teaching,providing new ideas and practical refer-ences for promoting the reform and innovation of National First-Class Courses.

AIM To investigate effects of petroleum ether fraction from Derris eriocarpa How on glucose and lipid metabolism in a mouse model of metabolic syndrome(MS).METHODS KM mice were fed a high-fat diet and administered streptozotocin intraperitoneally to establish MS models.The MS mice were then randomly assigned to the model group,the metformin hydrochloride group,the lovastatin group,the ursolic acid group,and the high-,medium-and low-dose D.eriocarpa petroleum ether fraction groups,with 10 mice in each group.Ten additional mice maitained on a normal diet served as the normal control group.After 4 weeks of intragastric administration,glucose and lipid metabolism indicators were measured.Hepatic pathological changes were assessed using HE staining and oil red O staining.Liver tissue mRNA expressions of ATF3,PEPCK,FXR,CYP7A1,HNF4ɑ,CYP8B1 and SRB1 were quantified by RT-qPCR.Hepatic protein expressions of ATF3,HNF4ɑ,PEPCK,FXR and CYP7A1 was analyzed by Western blot in MS mice.RESULTS Compared to the model group,the high-dose D.eriocarpa petroleum ether fraction group exhibited significant glucose tolerance improvement(reduced OGTT-AUC,P＜0.01);favorable serum lipid modulation in terms of increased HDL-C levels(P＜0.01)and decreased TG,TC,LDL-C(P＜0.01);reduced renal biomarkers(BUN,SCR)and hepatotoxic indicators of TBA,AST and ALT activities(P＜0.01);alleviated hepatic lipid accumulation and histopathological damage;downregulated mRNA and protein expressions of ATF3,HNF4ɑ and PEPCK,as well as CYP8B1 mRNA expression(P＜0.01);and upregulated mRNA and protein expressions of FXR and CYP7A1,along with SRB1 mRNA expression(P＜0.01).CONCLUSION D.eriocarpa petroleum ether fraction ameliorates glucose and lipid metabolism dysregulation in MS mice by modulating the ATF3/HNF4ɑ/CYP7A1 signaling pathway,consequently eliciting hypoglycemic,hypolipidemic,hepatoprotective and nephroprotective effects.

OBJECTIVE To establish a method for simultaneous determination of 7 anti-tumor drugs(irinotecan,capecitabine,paclitaxel,docetaxel,tamoxifen,letrozole and methotrexate)in human plasma and apply it to the clinic.METHODS After precipitating with a methanol-acetonitrile mixture(1∶1,V/V)containing 0.1%formic acid,liquid chromatography-tandem mass spectrometry(LC-MS/MS)was used to determine the plasma concentration,using deuterium isotopes of each analyte as internal standards.The chromatography was performed on the Agilent Eclipse Plus C18 column with a gradient elution of water(containing 0.1%formic acid+0.04%5 mmol/L ammonium formate)as mobile phase A and acetonitrile(containing 0.1%formic acid)as mobile phase B.The flow rate was 0.6 mL/min,and the column temperature was set at 40℃.The sample size was 10 μL,and the analysis lasted for 5.5 min.Electrospray ionization was used in positive and negative ion mode,and multiple reaction monitoring mode was used.The ion pairs used for quantitative analysis were m/z 587.1→167.1(irinotecan),m/z 360.1→244.1(capecitabine),m/z 876.4→308.0(paclitaxel),m/z 830.3→304.2(docetaxel),m/z 372.1→129.1(tamoxifen),m/z 284.1→242.1(letrozole),and m/z 455.0→ 308.0(methotrexate).A total of 97 patients with malignant tumors in our hospital were selected to measure the plasma concentrations of 7 anti-tumor drugs using the above method.RESULTS The linear ranges of irinotecan,capecitabine,paclitaxel,docetaxel,tamoxifen,letrozole and methotrexate were 2-1 000 ng/mL(r=0.994 3),20-10 000 ng/mL(r=0.997 5),2-1 000 ng/mL(r=0.997 9),1-500 ng/mL(r=0.995 8),1-500 ng/mL(r=0.995 2),1-500 ng/mL(r=0.996 4),10-5 000(r=0.997 7),respectively.The quantitative lower limits were 2,20,2,1,1,1 and 10 ng/mL;RSDs of intra-assay precision were 0.08%-14.86%(n=6).RSDs of inter-batch precision were 1.51%-11.55%(n=3),and the accuracies were 89.17%-114.93%(n=6).The matrix effects ranged from 89.89%-119.74%(n=6).RSDs of the stability tests were 1.98%-14.88%(n=6).The results of clinical application showed,the average plasma concentrations of irinotecan,capecitabine,paclitaxel and docetaxel were 704.09,909.40,36.45,150.43 ng/mL,respectively.The values of the coefficient of variation were 25.24%,62.65%,122.69%,and 92.27%.CONCLUSIONS The established LC-MS/MS method is simple and rapid,and can be used for the simultaneous determination of 7 commonly used anti-tumor drugs in the plasma of patients with malignancy.

Spine fracture and dislocation are common traumatic spinal conditions that often require surgical intervention due to compromised spinal stability. Surgical approaches include anterior, posterior, and combined anterior-posterior spinal procedures. According to the specific surgical requirements, patients may be placed in the prone position or repositioned between prone and supine positions during surgery. Intraoperative repositioning has become an essential step in patient positioning. However, during repositioning, patients with spinal fracture and dislocation are at increased risk for complications such as hemodynamic instability, nerve injury, and pressure injuries to the skin and soft tissue. Notably, due to the instability of the spinal cord, even minor manipulations can further exacerbate the damage, potentially leading to severe outcomes like paraplegia. Although the current clinical guidelines provide instructive recommendations for standard position, there remains no specific protocols for intraoperative repositioning in patients with spine fracture and dislocation. With a concern for the lack of clinical studies on positioning techniques, risk prevention, and operational norms for special patients, no applicable guidelines or standards are available. A consensus was required to provide clinical reference, meet the requirements of surgical treatment, and minimize the safety risks of patients caused by improper placement of positions. Professional Committee of Operating Room Nursing of Shaanxi Nursing Association organized experts in nursing management and operating room nursing from major hospitals across China to formulate Expert consensus on intraoperative repositioning for patients with spinal fracture and dislocation ( version 2025). The consensus provides 11 recommendations covering pre-repositioning preparation, intraoperative maneuvers, and post-repositioning observation, aiming to provide references for clinical standardization of the intraoperative repositioning process and protection of patients′ safety.

BACKGROUND:Lijin manipulation can reduce fibrosis scar hyperplasia and promote skeletal muscle repair.However,improper activation of the Wnt/β-catenin signaling pathway can aggravate the fibrosis of injured skeletal muscle and adversely affect the repair process of skeletal muscle.To study the regulatory effect of Lijin manipulation on the Wnt/β-catenin signaling pathway is conducive to elucidate the related mechanisms of Lijin manipulation in reducing fibrosis scar hyperplasia and promoting skeletal muscle injury repair.OBJECTIVE:To explore the mechanism of Lijin manipulation in promoting the repair of skeletal muscle injury in rabbits.METHODS:Forty-five healthy adult Japanese white rabbits were randomly divided into blank group,model group and Lijin group with 15 rabbits in each group.Gastrocnemius muscle percussion modeling was performed in both model group and Lijin group.Lijin manipulation was performed in the Lijin group on the 3rd day after modeling,once a day,15 minutes once.Five animals in each group were selected and killed on the 7th,14th and 21st days after modeling.The general morphological structure of gastrocnemius was observed by hematoxylin-eosin staining and the content of collagen fiber was observed by Masson staining.Western blot was used to detect the protein expression of Wnt3a,β-catenin,GSK3β,p-GSK3β,TCF,type I collagen and type III collagen in gastrocnemius muscle,and RT-PCR was used to detect the mRNA expression of Wnt3a,β-catenin and TCF.The expression of β-catenin was detected by immunofluorescence,and the expression of type I collagen and type III collagen was detected by immunohistochemistry.RESULTS AND CONCLUSION:The results of hematoxylin-eosin staining and Masson staining showed that compared with the model group,inflammatory cell infiltration and collagen fiber amount decreased in the Lijin group(P<0.001),and muscle fibers gradually healed.Western blot results showed that compared with the model group,the protein expression levels of Wnt3a,β-catenin,TCF,type I collagen and type III collagen were significantly decreased in the Lijin group at all observation time points(P<0.05),while the ratio of P-GSK3β/GSK3β was significantly increased in the Lijin group at all observation time points compared with the model group(P<0.05).RT-PCR results showed that compared with the model group,the mRNA expression levels of Wnt3a,β-catenin and TCF were significantly decreased in the Lijin group at all observation time points(P<0.001).Immunofluorescence results showed that compared with the model group,the fluorescence intensity of β-catenin expression in the Lijin group was significantly decreased at each observation time point and gradually became similar to that in the blank group(P<0.001).Immunohistochemical results showed that the expression levels of type I collagen and type III collagen in the Lijin group were significantly lower than those in the model group(P<0.01).To conclude,Lijin manipulation could inhibit the abnormal activation of the Wnt/β-catenin signaling pathway,reduce fibrotic scar hyperplasia,and promote the repair of injured skeletal muscle.

BACKGROUND:Excessive apoptosis in skeletal muscle cells will destroy the dynamic balance of the number of myocytes,leading to pathological injury of skeletal muscle.Lijin manipulation is effective in treating skeletal muscle injury,but whether it can inhibit apoptosis and promote the repair of skeletal muscle injury is unknown.OBJECTIVE:To explore the mechanism by which Lijin manipulation reduces inflammation and apoptosis during the repair of skeletal muscle injury in rabbits.METHODS:Forty-five healthy adult Japanese white rabbits were randomly divided into blank group,model group and Lijin group(n=15 per group).No intervention was performed in the blank group.Gastrocnemius muscle percussion molding was performed in both the model group and Lijin group.After modeling,the model group was not treated,while the Lijin manipulation(Stroking,kneading,and rubbing)was performed in the Lijin group on the 3rd day,once a day,15 min/time.Sampling in each group was performed on the 7th,14th and 21st days after modeling.The general morphological structure of gastrocnemius was observed by hematoxylin-eosin staining.The ultrastructure of gastrocnemius muscle was observed by transmission electron microscopy.Apoptosis of gastrocnemius cells was observed by TUNEL staining.The expressions of interleukin-1β,interleukin-6 and interleukin-10 in gastrocnemius muscle were detected by ELISA.The protein expressions of BAX,BCL-2 and Caspase3 in gastrocnemius muscle were detected by western blot.The mRNA expression of BAX and BCL-2 was detected by RT-PCR.RESULTS AND CONCLUSION:(1)Hematoxylin-eosin staining results showed that compared with the model group,inflammatory cells decreased in number,myocyte amount increased,and muscle tissue gradually healed in the Lijin group at each observation point.(2)The results of transmission electron microscopy showed that compared with the model group,the arrangement of muscle fibers at each observation point in the Lijin group was gradually orderly,mitochondria were gradually complete,Z-line arrangement was gradually regular,and free ribosomes were gathered.(3)TUNEL staining results showed that compared with the model group,apoptosis rate in the Lijin group was gradually decreased at all observation points(P<0.05).(4)ELISA results showed that compared with the model group,the expression of interleukin-1β and interleukin-6 in the Lijin group continued to decrease(P<0.05),while the expression of interleukin-10 increased on the 7th day after modeling,and then showed a downward trend(P<0.05).(5)Western blot results showed that compared with the model group,the expression of BCL-2 protein/BAX protein in the Lijin group was significantly increased at each observational point(P<0.05).The protein expression of Caspase3 decreased significantly(P<0.001),and was gradually similar to that of the blank group.(6)RT-PCR results showed that compared with the model group,the mRNA expression level of BCL-2/BAX in the Lijin group was significantly higher at each observational point(P<0.05).To conclude,Lijin manipulation can inhibit inflammation,reduce apoptosis,and promote the repair of injured skeletal muscle.

Aim To investigate the effect of cordycepin(COR)on gentamicin(GEN)-induced nephrotoxicity and the molecular mechanism of inhibiting oxidative stress and ferroptosis induced by GEN.Methods The oral SD rats were divided into a control group,GEN group,and GEN+COR group.Following the success-ful setting up of the animal model,the serum creatinine(CR)and urea nitrogen(BUN)levels of rats were measured,and renal tissue injury was assessed using HE staining.In addition,the contents of malondialde-hyde and glutathione in kidney tissues of SD rats in each group were detected,and the expressions of fer-roptosis markers GPX4 and SLC7A11 were analyzed by Western blot.Results Compared with the control group,CR and BUN in GEN-stimulated group signifi-cantly increased(P＜0.01),and the level of CR and BUN was effectively reduced after 50 mg·kg-1 COR oral administration.HE results also showed that COR could alleviate the kidney tissue damage caused by GEN.COR could reverse the increase of malondialde-hyde level and the decrease of glutathione level caused by GEN in rat kidney tissue,and COR could restore the decrease of GPX4 and SLC7A11 protein levels induced by GEN.Conclusion COR can reduce GEN-induced kidney injury by inhibiting oxidative stress and ferrop-tosis.