1.Effects of Modified Buyang Huanwu Tang on Mice with Cerebral Ischemia-reperfusion Injury by Regulating PINK1/Parkin Signaling Pathway-mediated Mitochondrial Autophagy
Li GUO ; Hengwen CHEN ; Cun ZHAN ; Zhenzhen YING ; Zuomin WU ; Shaoju JIN ; Shangmei CAO ; Shengming HUANG ; Jin WANG ; Xiaotao YU
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(11):34-43
ObjectiveTo investigate the effects of modified Buyang Huanwu Tang on cerebral ischemia-reperfusion injury (CI/RI) in mice via the PTEN-induced putative kinase 1/E3 ubiquitin ligase (PINK1/Parkin) signaling pathway-mediated mitophagy, and to explore the underlying mechanism by which modified Buyang Huanwu Tang improves CI/RI. MethodsSeventy-two male C57BL/6J mice were randomly divided into six groups (n = 12 per group): Sham-operated group, middle cerebral artery occlusion/reperfusion (MCAO/R) model group, low-, medium-, and high-dose modified Buyang Huanwu Tang groups (8.84, 17.68, 35.36 g·kg-1·d-1), and an aspirin group (13.00 mg·kg-1·d-1). Neurological deficit scores were assessed using the Zea-Longa method. Cerebral infarct volume ratio was measured by 2,3,5-triphenyltetrazolium chloride (TTC) staining. Histopathological changes and neuronal injury in brain tissues were observed using hematoxylin-eosin (HE) staining and Nissl staining. Apoptosis was detected by terminal deoxynucleotidyl transferase-mediated dUTP nick-end labeling (TUNEL) assay. Mitochondrial ultrastructure in brain tissue was observed by transmission electron microscopy (TEM). Serum levels of superoxide dismutase (SOD) and malondialdehyde (MDA) were determined by enzyme-linked immunosorbent assay (ELISA). The mRNA and protein expression levels of PINK1, Parkin, microtubule-associated protein 1 light chain 3B (LC3B, LC3Ⅱ/Ⅰ), and p62 in brain tissues were detected by real-time quantitative reverse transcription PCR (Real-time PCR) and Western blot, respectively. ResultsCompared with the sham-operated group, the MCAO/R model group showed significantly increased neurological deficit scores and cerebral infarct volume ratios (P<0.01). Severe cortical injury on the infarct side was observed, characterized by decreased neuronal density, cytoplasmic vacuolation, nuclear pyknosis, a marked reduction in Nissl bodies, dissolution of Nissl bodies in the cytoplasm of some pyramidal neurons, and blurred cellular boundaries. The number of TUNEL-positive cells increased significantly (P<0.01). Mitochondria exhibited cristae membrane rupture and matrix vacuolation, with rupture of the outer mitochondrial membrane and formation of autophagosomes, the number of which increased significantly. Serum SOD activity decreased significantly (P<0.01), while MDA content increased significantly (P<0.01). In infarcted brain tissues of model mice, the relative mRNA expression and protein levels of PINK1, Parkin and LC3B were significantly increased (P<0.05, P<0.01), whereas p62 mRNA and protein expression were significantly decreased (P<0.05, P<0.01), showing statistical significance. Compared with the model group, all treatment groups showed significantly decreased neurological deficit scores and cerebral infarct volume ratios (P<0.01). Neuronal density increased significantly, cytoplasmic vacuolation was alleviated, nuclear morphology tended to be more regular and clearer, Nissl body density increased significantly with reduced dissolution and improved contour clarity. The mitochondrial cristae structure was partially restored, with some mitochondria showing autophagosome encapsulation, and the degree of mitochondrial damage was alleviated. Serum SOD activity increased significantly (P<0.01), while MDA content decreased significantly. The mRNA and protein expression levels of PINK1, Parkin, and LC3Ⅱ/Ⅰ were significantly increased (P<0.05, P<0.01), while p62 mRNA and protein expression in the low- and medium-dose modified Buyang Huanwu Tang groups were significantly decreased (P<0.05, P<0.01), showing statistical significance. ConclusionModified Buyang Huanwu Tang can upregulate the protein expression levels of PINK1, Parkin, and LC3Ⅱ/Ⅰ and downregulate p62 protein expression, suggesting that it may improve CI/RI by regulating the expression of proteins related to the PINK1/Parkin signaling pathway. Regulation of the mitophagy pathway may be one of the mechanisms by which modified Buyang Huanwu Tang alleviates CI/RI in mice.
2.Exploring Biological Characteristics of Rat Model of Atrial Fibrillation with Phlegm-heat and Blood Stasis Pattern Based on Metabolomics
Ailin HOU ; Yuxuan LIU ; Wenxi YU ; Xing JI ; Chan WU ; Dazhuo SHI ; Ying ZHANG
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(5):245-255
ObjectiveTo establish an animal model of atrial fibrillation(AF) that accurately reflects the phlegm-heat and blood stasis(TRYZ) pathogenesis in traditional Chinese medicine. MethodsForty SPF-grade SD rats were randomly assigned using a random number table to the following groups:the control group, the TRYZ+AF group,the AF group and the TRYZ group, with ten rats in each group. The TRYZ+AF and TRYZ groups underwent a high-fat diet combined with intraperitoneal lipopolysaccharide(LPS) injection to simulate the pathological alterations of TRYZ syndrome. Groups TRYZ+AF and AF were induced with acetylcholine-calcium chloride(Ach-CaCl2) via caudal vein injection to induce AF. The control group received no intervention and was maintained under normal conditions. The modeling period lasted 3 weeks. Electrocardiography was used to assess AF episodes and duration, echocardiography evaluated left atrial dimensions and cardiac function, fully automated biochemical analyzer measured the levels of total cholesterol(TC), triglycerides(TG), high-density lipoprotein cholesterol(HDL-C) and low-density lipoprotein cholesterol(LDL-C), hemoreometer analyzed the whole blood viscosity, plasma viscosity, and whole blood reduced viscosity, a coagulation analyzer assessed prothrombin time(PT), activated partial thromboplastin time(APTT), thrombin time(TT), and fibrinogen(FIB), enzyme-linked immunosorbent assay(ELISA) was used to determine the levels of C-reactive protein(CRP), interleukin(IL)-1β, IL-6, IL-17, tumour necrosis factor(TNF)-α, matrix metalloproteinase-9(MMP-9), galectin-3(Gal-3), Collagen Ⅰ, and α-smooth muscle actin(α-SMA). Hematoxylin-eosin(HE) staining and Masson's trichrome staining were used to analyze pathological changes in atrial myocardium, Western blot was employed to detect MMP-9, Collagen Ⅰ and α-SMA protein expression in myocardial tissue, real-time quantitative polymerase chain reaction(Real-time PCR) evaluated fibrous factor gene expression levels. Changes in the TRYZ syndrome were assessed via body weight, tongue color[red(R), green(G), and blue(B)], and rectal temperature. Ultra-performance liquid chromatography-quadrupole-time-of-flight mass spectrometry(UPLC-Q-TOF-MS) was employed to detect differential metabolites between the control group and the TRYZ+AF group. ResultsFollowing three weeks of sustained modeling, compared with the control group, rats in the TRYZ+AF and the TRYZ groups exhibited reduced body weight, dry faeces, elevated rectal temperature, dark red tongue, decreased RGB values on the tongue surface, and markedly elevated TC and LDL-C levels(P<0.05, P<0.01). The TRYZ+AF, TRYZ, and AF groups exhibited significantly decreased TT, APTT and PT, along with markedly elevated whole blood viscosity and FIB(P<0.05, P<0.01). Rats in the TRYZ+AF and AF groups exhibited AF rhythm, markedly decreased heart rate, prolonged RR intervals, enlarged left atrium, and significantly reduced ejection fraction and shortening fraction(P<0.05, P<0.01). Serum levels of CRP, IL-1β, IL-6, IL-17, TNF-α, MMP-9, Gal-3, Collagen Ⅰ, and α-SMA were elevated in rats from the TRYZ+AF, TRYZ, and AF groups compared to the control group, with the most pronounced increase observed in the TRYZ+AF group(P<0.05, P<0.01). Histopathology revealed that the collagen fiber deposition in the atrial of rats in the TRYZ+AF, TRYZ and AF groups was higher than that in the control group(P<0.05, P<0.01). Western blot and Real-time PCR results further demonstrated that the protein and mRNA expression levels of MMP-9, Collagen Ⅰ and α-SMA in the myocardial tissue of the TRYZ+AF group were higher than those in the other three groups(P<0.05, P<0.01). Metabolomic analysis revealed 173 differentially expressed metabolites in the TRYZ+AF group and the control group, primarily enriched in pathways such as glycerophospholipid metabolism and glycolysis/gluconeogenesis. ConclusionThis study successfully establishes a rat model of AF integrated with the TRYZ syndrome, demonstrating the pathological process where the interactions of phlegm, heat and stasis jointly trigger tremor, this provides a reliable experimental tool for in-depth research into the biological basis of this disease syndrome.
3.Evaluation of CARIFS Score and Negative Antigen Conversion Rate of Qingxuan Daozhi Formula in Treatment of Influenza in Children (Heat Accumulation in Lung and Stomach Syndrome):A Multi-center Randomized Controlled Clinical Study
Jing WANG ; Liqun WU ; Tiegang LIU ; Yongning CAO ; Jing QIU ; Jing LI ; Huaqing TAN ; Ying ZHANG ; Xulei GOU ; Jia WANG ; Jing LI ; Haipeng CHEN ; Xueying QIN ; Yuanshuo TIAN ; Yang WANG ; Chen BAI ; Zhendong WANG ; Qianqian LI ; He YU ; Xueyan MA ; Fei DONG ; Lin JIANG ; Yingqi XU ; Jianping LIU ; Xiaohong GU
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(13):188-196
ObjectiveThis paper aims to observe the syndrome improvement and negative antigen conversion rate of Qingxuan Daozhi formula in the treatment of influenza in children (heat accumulation in the lung and stomach syndrome). MethodsThrough a multi-center randomized controlled methodology design,confirmed influenza cases were collected from October 2022 to April 2023 in the pediatrics department of eight hospitals,such as Dongfang Hospital of Beijing University of Chinese Medicine. A total of 180 children with influenza and heat accumulation in the lung and stomach syndrome conforming to the standard were recruited through the clinic. The sick children meeting the inclusion criteria were randomly divided into groups by a block-randomized method. The children in the experimental group were treated with Qingxuan Daozhi formula for five days,and those in the control group were treated with Oseltamivir Phosphate Granules for five days. The primary efficacy indicator was the negative conversion rate of influenza antigen detection. Secondary efficacy indicators were the Canadian acute respiratory illness and flu scale (CARIFS) and the incidence of complications,severe cases, and critical cases. Follow-up observation was conducted on the day of enrollment,48 hours after medication,72 hours after medication, and (6+1) d after medication. ResultsOne hundred and eighty participants were randomly assigned to the experimental group (90 cases) or the control group (90 cases). All participants were followed up during the study. Comparison of influenza antigen detection results in the primary efficacy indicators showed that the average time of negative influenza antigen conversion in the experimental group was (5.29±1.25) d,and that in the control group was (5.40±1.68) d,without a statistically significant difference. After five days of intervention,52 cases in the experimental group and 51 cases in the control group converted to negative,without a statistically significant difference. CARIFS score results in the secondary efficacy indicators showed that during 72 hours after intervention,there were statistically significant differences between the experimental group and the control group in three dimensions, including headache,muscle soreness, and the need for extra care (P<0.05). On the (6+1) days after the intervention,the differences in both the experimental group and the control group were statistically significant in 10 dimensions, including sore throat,bad sleep,uncomfortable feeling,poor spirit and fatigue,crying more than usual,the need for extra care,symptom,function,influence on parents,and total score (P<0.05). The comparison results within the group in the dimensional scores of symptom, function, and influence on parents,as well as the CARIFS total score showed that with the delay of follow-up time,scores of both groups decreased significantly,with a statistically significant difference (P<0.01). Inter-group comparison results showed that the mean score of the experimental group was higher than that of the control group at the time of enrollment. With the progress of intervention,the score of the experimental group was significantly decreased compared with that of the control group. At the end of follow-up,the mean score of the experimental group was lower than that of the control group,with no statistically significant difference. In terms of the incidence of complications,severe cases, and critical cases, there were no complications,severe cases, and critical cases in the two groups,without a statistically significant difference. ConclusionThe symptom improvement effect and negative antigen conversion rate of Qingxuan Daozhi formula in the treatment of influenza in children (heat accumulation in the lung and stomach syndrome) are not inferior to Oseltamivir Phosphate granules, and children's acceptance is better. It can be more widely used in clinical treatment of influenza in children (heat accumulation in the lung and stomach syndrome).
4.Multidimensional analysis of accuracy of CTU, contrast-enhanced MRI and CEUS in qualitative diagnosis of renal space-occupying lesions
Linjie WU ; Ying YU ; Xiaojie BAI ; Zihao QI ; Hang ZHENG ; Zhongqiang GUO
Journal of Modern Urology 2025;30(1):48-52
[Objective] To compare the diagnostic accuracy of three imaging modalities, inlducing CT urography (CTU), contrast-enhanced MRI (CE-MRI), and contrast-enhanced ultrasound (CEUS) in the qualitative diagnosis of renal space-occupying lesions. [Methods] A retrospective analysis was performed on 542 patients with renal lesions confirmed by surgical pathology in our hospital during Jan.2019 and May 2024.The diagnostic results of CTU, CE-MRI and CEUS were compared and analyzed based on the patients' clinical and pathological data. [Results] The diagnostic accuracy rate of CTU, CE-MRI and CEUS were 84.50%, 83.14% and 86.14%, respectively.For the 161 patients who underwent all three examinations, CEUS was significantly more accurate than CTU (84.16% vs. 77.02%, P=0.018), while there was no significant difference between CTU or CEUS and CE-MRI (79.81%) (P>0.05). Further analysis found that for lesions ≤4 cm, the accuracy of the three examinations was as follows: CEUS=CTU 79.55%, CE-MRI 76.14%, with no significant difference (P>0.05). However, for lesions >4 cm, CEUS ranked the first, followed by CE-MRI and CTU (89.73% vs. 84.25% vs. 73.97%), and CEUS and CE-MRI were better than CTU (P<0.05). Additionally, for the diagnosis of clear cell renal carcinoma and benign renal space-occupying lesions, there was no statistically significant difference among the three imaging modalities (P>0.05), while for the qualitative diagnosis of non-clear cell renal carcinoma, CEUS ranked the first, followed by CE-MRI and CTU (83.87% vs. 74.19% vs. 56.45%), and CE-MRI and CEUS were better than CTU (P<0.05). [Conclusion] All of them have important diagnostic value, and the appropriate selection should be based on patients' specifc conditions.CEUS and CE-MRI are more accurate in the qualitative diagnosis of renal space-occupying lesions than CTU, especially for large lesions and non-clear cell carcinoma.
5.Analysis of the safety of intravascular lithotripsy and rotational atherectomy in the management of coronary artery calcification
Zhang-ying WU ; Li ZHU ; Su LI ; Jia HUANG ; Yu-xiang DAI
Chinese Journal of Interventional Cardiology 2025;33(11):634-639
Objective To investigate the safety of intravascular lithotripsy(IVL)and coronary rotational atherectomy(RA)in the management of coronary artery calcification(CAC).Methods In this retrospective,matched-pair cohort study,210 patients with severe CAC treated at Zhongshan Hospital,Fudan University between December 2021 and April 2025 were enrolled.The cohort was equally divided into two interventional groups:IVL group(n=105)and RA group(n=105),based on the revascularization strategy employed.Procedure parameters,postoperative biochemical markers of myocardial injury,and incidence of in-hospital major adverse cardiovascular events(MACE)were compared between the two groups.Results Before propensity score matching(PSM),statistically significant differences were observed in terms of the proportions of the left anterior descending artery(77.1%vs.63.8%,P=0.034),the right coronary artery(14.3%vs.30.5%,P=0.005),and the percentage of target vessel stenosis[85%(80%,90%)vs.80%(80%,90%),P=0.014]between the IVL and RA groups.After PSM,these differences became insignificant(all P>0.05).There is no statistically significant differences in stent implantation rate,drug-coated balloon usage rate,stent diameter,or total stent length between the IVL and RA groups(all P>0.05).Compared to the RA group,although the IVL group had a higher utilization of tirofiban after the procedure,and a lower rate of intravenous nitrate during the procedure,these differences were not statistically significant(all P>0.05).cTnT levels increased significantly after the procedure in both the IVL and RA groups(all P<0.001).Before PSM,the preoperative cTnT levels were comparable between the IVL and RA groups(P=0.525),while a statistically significant difference emerged postoperatively(P=0.038).The incidence of in-hospital myocardial infarction showed no significant intergroup difference(8.6%vs.16.2%,P=0.094),and no events of death or target vessel revascularization occurred in either group.After PSM,despite no significant difference in preoperative cTnT levels between the IVL and RA groups(P=0.235),a significant difference was observed postoperatively(P=0.014).Furthermore,while no deaths or target vessel revascularization occurred in either group,the IVL group demonstrated a significantly lower incidence of in-hospital myocardial infarction compared to the RA group(9.9%vs.23.9%,P=0.025).Conclusions The use of intravascular lithotripsy for the pretreatment in patients with severe CAC is safe and promising.
6.Behavior,willingness and influencing factors of free influenza vaccination for older people in Deqing County,Zhejiang Province
Yu-yang XIE ; Dong-qing FENG ; Sheng-yu CHEN ; Bo WU ; Ying-feng CHEN ; Chao-wei FU
Fudan University Journal of Medical Sciences 2025;52(5):686-693
Objective To survey the free influenza vaccination status and willingness among the elderly in Deqing County,Zhejiang Province,and analyze the influencing factors.Methods Based on population data and the electronic medical system of Deqing County,the influenza vaccine coverage from 2018 to 2022 after the implementation of the free influenza vaccination policy was calculated.A proportional stratified random sampling method was used to select elderly individuals aged 60 and above from six streets/towns in Deqing County.A questionnaire survey was conducted to assess influenza vaccination behaviors from 2020 to 2022 and vaccination willingness for the 2023 influenza season.The chi-square test and logistic regression were used to analyze potential factors associated with vaccination behavior and subsequent willingness among the elderly.Results An average of influenza vaccines for the elderly per year were 56.2 thousand,with influenza vaccination coverage rate of 46.16%in average over the five years.Among 729 subjects,the vaccination rate increased from 69.3%in 2020 to 75.3%in 2022,and 81.9%of them were willing to receive influenza vaccines in the next flu season.Logistic regression analysis revealed that individuals with agricultural household registration(OR=3.05,95%CI:1.82-8.99),lower education levels(OR=2.82,95%CI:1.15-6.93),awareness of the free vaccine policy(OR=4.65,95%CI:1.82-11.91),and belief in vaccine efficacy(OR=6.61,95%CI:3.20-13.61)had higher vaccination rates.Factors associated with a more positive vaccination willingness included an annual household income of<150 thousand CNY(OR=1.65,95%CI:1.04-2.60),awareness of the free vaccine policy(OR=3.07,95%CI:1.84-5.12),perceived vaccine efficacy(OR=4.39,95%CI:2.77-6.96),and perceived vaccine safety(OR=1.57,95%CI:1.01-2.43).The main reasons for non-vaccination were concerned about the side effects of the vaccine(37.9%),thoughts that they were in good health and did not need to be vaccinated(30.3%),and influenza vaccines were ineffective(21.2%).The main reasons for vaccination were to protect themselves(89.1%),vaccination was free(65.5%)and to protect their families(60.6%).Conclusion The elderly in Deqing County had a relatively high influenza vaccination rate and follow-up vaccination willingness rate,but there still existed a gap to reach at target rate recommended by WHO.The local government should strengthen health education related to influenza vaccine knowledge,and publicize free vaccination policy to improve the vaccination rate and willingness in next season.
7.Effects of Aqueous Extract of Corn Silk Combined with Training on Exercise Function and Glycolipid Metabolism in Mice with Metabolic Syndrome
Yi-lin LIU ; Zi-ling SONG ; Ting ZHOU ; Ji-ping CHEN ; Zi-han LIN ; Yu-xuan ZHANG ; Ji-qiang ZENG ; Shan-rong ZHANG ; Zhi-peng WU ; Chen LU ; Ying ZHU
Progress in Modern Biomedicine 2025;25(15):2411-2420
Objective:To investigate the effects of combination therapy with aqueous extract of corn silk(CS)and training on exercise capacity and glycolipid metabolism in mice with metabolic syndrome(MS).Methods:In this study,db/db mice were used as the animal model of MS.The mice were administered aqueous extract of CS via gavage and subjected to different intensities of training for 12 weeks(3 months).The specific experimental design was as follows:24 db/db mice were randomly divided into four groups on average:negative control group(NC),aqueous extract of CS group(CS),aqueous extract of CS+moderate-intensity training group(CS+MT),and CS aqueous extract of CS+high-intensity training group(CS+HT).The maximum running speed,forelimb grip strength,body weight and fasting blood glucose of mice were measured before and after treatment.After the intervention,oral glucose tolerance test(OGTT)and insulin tolerance test(ITT)were conducted to assess glucose metabolism,while serum triglyceride(TG),total cholesterol(TC),high-density lipoprotein cholesterol(HDL-C),and low-density lipoprotein cholesterol(LDL-C)levels were measured to evaluate lipid metabolism.Results:After 3 months of intervention,there were significant differences in the maximum running speed and forelimb grip strength among the four groups(P<0.05).The maximum running speed and forelimb grip strength of CS group,CS+MT group and CS+HT group were higher than those of NC group(P<0.05).The CS+MT group exhibited higher forelimb grip strength,and the CS+HT group showed higher maximum running speed and forelimb grip strength compared to the CS group(P<0.05),while no significant difference was found between the CS+MT and CS+HT groups(P>0.05).Significant differences in body weight were observed among the four groups after 3 months of intervention(P<0.05).Specifically,the CS+MT and CS+HT groups exhibited significantly lower body weight compared to both the NC and CS groups(P<0.05),with the CS+MT group having the lowest body weight(P<0.05).Fasting blood glucose levels also differed significantly among the groups after 2 and 3 months of intervention(P<0.05).The CS,CS+MT,and CS+HT groups had lower fasting blood glucose levels compared to the NC group(P<0.05),with the CS+MT and CS+HT groups showing the lowest levels(P<0.05).No significant difference was found between the CS+MT and CS+HT groups(P>0.05).After 3 months of intervention,significant differences in the area under the curve(AUC)of OGTT and ITT were observed among the four groups(P<0.05).The AUC of OGTT and ITT were significantly lower in the CS,CS+MT,and CS+HT groups compared to the NC group(P<0.05).The CS+MT and CS+HT groups exhibited the lowest AUC values for both OGTT and ITT(P<0.05),with the CS+MT group showing the lowest AUC for OGTT(P<0.05).Significant differences in serum lipid levels were observed among the four groups after 3 months of intervention(P<0.05).TG,TC,and LDL-C levels were significantly lower,while HDL-C levels were higher in the CS,CS+MT,and CS+HT groups compared to the NC group(P<0.05).The CS+MT group had the lowest TG levels and the highest HDL-C levels compared to the CS+HT group(P<0.05),with no significant differences in TC and LDL-C levels between these two groups(P>0.05).Conclusion:Aqueous extract of CS combined with different intensity training can significantly improve the exercise capacity and glycolipid metabolism of MS mice and reduce body weight,especially CS combined with MT treatment is more effective in improving lipid metabolism.In addition,when combined with HT,aqueous extract of CS can also play an auxiliary role in reducing the side effects of high-intensity exercise and improving the therapeutic effect.
8.Atomic force microscopic observation of surface structure of purified protein molecules in vitro
Zhao-ying CHEN ; Xiao-feng FANG ; Dan-yan LIU ; Meng-qin CHEN ; Xi LING ; Jie-min ZHAO ; Wei WEI ; Yu-jing WU
Chinese Pharmacological Bulletin 2025;41(1):193-199
Aim To compare the observation results of atomic force microscopy(AFM)and scanning electron microscopy(SEM),and to summarize the main problems and solutions of AFM in observing biological macromolecules,using the observa-tion subjects of protein samples purified by our research group.Methods The protein samples were diluted to 15 nmol·L-1 with PBS,fixed on glass slides,silicon wafers,and mica sheets,dried,and made into solid-phase observation samples.SEM sam-ples were plated with platinum before observation.The surface structures of proteins were observed using AFM and SEM,sample heights were calculated,and differences in results were com-pared.Results Protein samples with positive charges tended to shift to the right during observation due to the repulsion of the AFM probe;mica sheets could effectively eliminate the positive charge of proteins to avoid sample movement;PBS provided a stable environment for protein samples,but the crystallization of PBS salts interfered with probe operation and imaging clarity;SEM samples needed to be plated with platinum before observa-tion and could not achieve the precision of AFM.Conclusions Both AFM and SEM can directly observe protein structures in vitro,with AFM providing higher precision results;when protein sample stability permits,ultrapure water is preferred as the sol-vent carrier,and volatile liquids such as ethanol can also serve as solvent carriers.The application of AFM offers a new approach for pharmacological studies on interactions between biological macromolecules.
9.Analysis of the predictive value of serum peroxiredoxin 4 in early pregnancy for the risk of gestational diabetes
Huan WU ; Ying ZHUANG ; Min ZHOU ; Ziping PENG ; Chan YU
Tianjin Medical Journal 2025;53(10):1057-1061
Objective To investigate changes of serum peroxiredoxin 4 level in patients with gestational diabetes mellitus(GDM)at the early stage and its diagnostic value for GDM.Methods A total of 372 early pregnant women who visited our hospital from March 2021 to May 2024 were selected as the study subjects.The diagnosis of GDM was determined based on the results of the oral glucose tolerance test(OGTT).Pregnant women were divided into the GDM group(n=89)and the control group(n=283).Clinical data,laboratory indicators and levels of peroxiredoxin 4 were compared between two groups of patients.The correlation between serum peroxiredoxin 4 levels and laboratory indicators was analyzed.Risk factors for the occurrence of GDM and its diagnostic efficacy for GDM were also analyzed.Results The proportion of family history of diabetes,insulin resistance index(HOMA-IR),fasting plasma glucose(FPG),postprandial 1 h glucose(1 hPG),postprandial 2 h glucose(2 hPG),C-peptide and serum peroxidase reductase 4 were higher in the GDM group than those in the control group(P<0.05),while the pancreatic β-cell function index(HOMA-β)was lower in the GDM group than those in the control group(P<0.05).The level of serum peroxidase reductase 4 was positively correlated with HOMA-IR,FPG,1 hPG,2 hPG and C-peptide in the GDM group,and which was negatively correlated with HOMA-β(P<0.05).Multifactorial Logistic regression analysis showed that elevated HOMA-IR,FPG,1 hPG,2 hPG,C-peptide and peroxidase reductase 4 were risk factors for the occurrence of GDM,while elevated HOMA-β was the protective factor for the occurrence of GDM(P<0.05).The area under the curve(AUC)for peroxidase reductase 4 in diagnosing GDM was 0.912(95%CI:0.871-0.953),with a sensitivity of 79.79%and specificity of 89.36%when the optimal cutoff value was 0.93 U/L.Conclusion The serum level of peroxiredoxin 4 in GDM patients is significantly elevated,showing good diagnostic efficacy for GDM.
10.Current status of reality shock among new nurses and its influencing factors
Shan ZHANG ; Ying WU ; Xinyi WANG ; Yan YU ; Pan WEI
Chinese Journal of Practical Nursing 2025;41(16):1261-1266
Objective:To survey the current status of reality shock among new nurses and to explore its influencing factors, and provide reference for promoting the workplace adaptability of new nurses.Methods:New nurses from 9 tertiary Grade A hospitals in Shaanxi Province were selected by convenience sampling method from February to May 2024. General data questionnaire, the Reality Shock Scale, the Feedback-Seeking Behaviour Scale, and the Role Clarity Scale were used to conduct a cross-sectional investigation, and multiple linear regression was used to analyze the influencing factors of new nurses′reality shock.Results:A total of 362 valid questionnaires were collected, including 68 males and 294 females. The scores of reality shock, feedback-seeking behaviour, and role clarity were (70.12 ± 20.18), (54.25 ± 10.65) and (31.94 ± 4.45) points respectively. Reality shock was negatively correlated with feedback-seeking behaviour and role clarity ( r=-0.583, -0.785, both P<0.01), feedback-seeking behaviour was positively correlated with role clarity ( r=0.652, P<0.01). Gender, only-child status, entry time, feedback-seeking behaviour and role clarity were the influencing factors of reality shock ( t values were -15.60-2.23, all P<0.05), accounted for 63.6% of the total variation. Conclusions:The reality shock of new nurses is above the medium level, and nursing managers should be aware of the problems and sense of gap that new nurses may encounter in the process of role transformation. In addition, pay more attention to the emotional needs and mental health status of new nurses who are male, only child, with short entry time, and have low feedback-seeking behavior and role clarity. Diversified training programs and targeted intervention strategies should be developed to help new nurses reduce reality shock.

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