The original version of this article (Yang et al., 2023) unfortunately contained a mistake. In Acknowledgments, the funding information for the Zhejiang Provincial Natural Science Foundation of China (No. LBY21H160001) was wrong. The correct funding should be the Zhejiang Health Science and Technology Project (No. 2022KY682), China.

Objective: To investigate the scientific research capacity building of administrative offices of Centers for Disease Control and Prevention (CDCs) across 31 provinces (autonomous regions, municipalities), the Xinjiang Production and Construction Corps, and 5 separately listed cities in China, so as to provide the reference for improving the positioning of office functions and promoting the enhancement of scientific research capabilities. Methods: A self-administered questionnaire survey was conducted among heads and staff members of administrative offices in 37 CDCs. Data on office setup, general information, staffing, scientific research incentive measures and outputs were collected and analyzed. Results: The 37 administrative offices of the CDCs had an average authorized staffing size of 12 personnel. There were 17 of them setting independently allocated budgets. A total of 511 staff members were surveyed, comprising 238 males and 273 females, resulting in a male-to-female ratio of 0.87∶1. In terms of educational attainment, the majority held bachelor's degrees (225 individuals, 44.03%) or master's degrees and above (157 individuals, 30.72%). Professional technical personnel constituted the main occupational category, 302 individuals accounting for 59.10%. Intermediate professional titles were most common, 138 individuals accounting for 27.00%. From 2021 to 2023, a total of 68 research incentive measures have been implemented, and 579 personnel have received further training. These offices cumulatively led or participated in 80 scientific research projects and published 253 papers. Sixteen offices reported 10 and above scientific research outputs. These offices generally exhibited higher proportions of independently allocated budgets, greater numbers of senior professional titles, more staff with master's degrees or above, more implemented research incentive measures, and higher frequencies of staff further trainings. Conclusions The staff in the administrative offices of CDCs generally have a high level of educational attainment and include a significant number of professional technical personnel. However, their scientific research capacity remains relatively underdeveloped. It is recommended to conduct targeted professional training and research-focused lectures to enhance research literacy, leverage the strengths of multidisciplinary backgrounds, and promote cross-departmental and cross-institutional scientific research activities.

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.

Ocular diseases pose a significant challenge to global health. The field of metabolomics, which involves the systematic identification and quantification of metabolites within a biological system, has emerged as a promising research approach for unraveling disease mechanisms and discovering novel biomarkers. Through its application, metabolomics has yielded valuable knowledge pertaining to the initiation and advancement of various ocular diseases. This review presents an overview of metabolomics and examines recent research progess in four ocular diseases, specifically diabetic retinopathy, age-related macular degeneration, glaucoma, and dry eye, summarizing potential biomarkers and metabolic pathways associated with these diseases. Additionally, this review offers insights into the future prospects of utilizing metabolomics for the management and treatment of ocular diseases.

Objective To observe the reliability of regional 4D flow and whole heart 4D flow cardiac MRI(CMRI)for measuring hemodynamic parameters of left ventricle.Methods Heart ultrasonography and CMRI were prospectively obtained in 31 healthy subjects.Hemodynamic parameters of left ventricle were measured using heart ultrasound,3-chamber 4D flow CMRI(based on inflow and outflow channel of left ventricle)and whole heart 4D flow CMRI,respectively.Intra-class correlation coefficient(ICC)was performed to evaluate the consistencies of the measured left ventricle hemodynamic parameters among the above 3 methods.Results Good consistencies of peak systolic velocity in aortic supravalvular/subvalvular,E peak diastolic velocity of mitral valve,supravalvular/subvalvular aortic pressure and aortic valve pressure gradient(all ICC＞0.75),while moderate consistency of A peak diastolic velocity of mitral valve(ICC=0.718)were found between heart ultrasound and 3-chamber 4D flow CMRI.Good consistencies of peak systolic velocity in aortic supravalvular/subvalvular,A peak diastolic velocity of mitral valve and supravalvular/subvalvular aortic pressure(all ICC＞0.75),while moderate consistencies of E peak diastolic velocity of mitral valve and aortic valve pressure gradient(ICC=0.600,0.628)were found between heart ultrasound and whole heart 4D flow CMRI.Meanwhile,good consistencies of the above parameters were found between 3-chamber 4D flow CMRI and whole heart 4D flow CMRI(all ICC＞0.75).Conclusion Measuring left ventricular hemodynamic parameters using local regional 4D flow and whole heart 4D flow CMRI were reliable,with good consistency with cardiac ultrasound.

Objective: To develop the Family-School-Community Cooperation Dilemma Scale for Nutritional Education in Primary Schools Students, and to determine its reliability and validity, in order to provide a basis for developing targeted strategies to promote family-school-community cooperation in the area of nutritional education. Methods: Based on overlapping spheres of influence theory, the initial scale was developed through a qualitative and literature review, discussion with Delphi experts and a pilot survey from July 2022 to July 2023. From July to September 2023, a total of 125 primary school parents, 118 primary school teachers and 113 community personnel were selected from six cities in Jiangsu Province by convenient sampling methods, who were investigated to test the reliability and validity of the scale and to develop a formal scale. Results: The final Family-School-Community Cooperation Dilemma Scale for Nutritional Education in Primary School students consisted of 3 dimensions and 19 items. The exploratory analysis extracted three metric factors, with a contribution ratio of 69.07% to the accumulated variance. The mean scale component effectiveness was 0.94, and the coefficient of association between the respective dimensions and the scale ranged from 0.80 to 0.91.The overall Cronbach α coefficient for the scale was 0.95, the folded half reliability was 0.87, and the retest reliability was 0.98. Conclusion The Family-School-Community Cooperation Dilemma Scale for Nutritional Education in Primary School Students has good reliability and validity, and can be used to measure the degree of the family-school-community cooperation dilemma regarding nutritional education in primary school students.

【Objective】 To study and compare the effects of different storage temperature and time on coagulation factor after cryoprecipitated antihemophilic factor(CAF) melting, and to provide reference for the establishment of industry standards. 【Methods】 From June 2021 to May 2023, a total of 96 bags of CAF were sampled in 4 bags per month, and timely detected in the same month. After the CAF was melted in a 37℃ water bath, the mild to moderate lipemic blood was labeled. Each bag of CAF and two 50 mL transfer bags were divided into two bags and two groups of 20 mL each using a sterile adapter. One group was placed in a 4℃ refrigerator and the other in a 22℃ water bath for 0 h, 4 h, 8 h, 12 h, 24 h and 48 h. Then 2 mL of aseptic sample was taken separately and put into the test tube, and 1mL of sample and 3 mL of buffer were added into the other test tube with the sampling gun and mixed on the machine for testing. The experimental data of 60 bags without mild to moderate lipemic blood cryoprecipitation and coagulation factor were randomly selected and statistically analyzed by SPSS21.0. 【Results】 After melting, CAF was stored for 0 h, 4 h, 8 h, 12 h, 24 h and 48 h to detect the average content and growth rate of coagulation factor in the two groups: 1) Storage at 4℃, factor Ⅷ content was 118.62, 111.57(-5.95%), 105.51(-11.05%), 103.30(-12.92%), 94.35(-20.46%) and 83.25(-29.82%) IU/ bag, respectively; Storage at 22℃, the factor Ⅷ content was 118.62, 112.69(-5.00%), 111.41(-6.08%), 109.01(-8.10%), 101.55(-14.39%) and 92.75(-21.81%) IU/ bag, and the storage results of the two groups were compared. At 24 h at 4℃ and 48 h at 22℃, the content of factor Ⅷ had significant statistical significance(P<0.01), and when stored at 22℃, the decay rate of factor Ⅷ was slower; 2) When stored at 4℃, the content of factor V was 41.19, 41.31(0.29%), 40.52(-1.64%), 40.27(-2.23%), 39.05(-5.19%) and 36.99(-10.21%) IU/ bag, respectively; Stored at 22℃, the factor V content was 41.19, 41.71(1.25%), 42.54(3.28%), 41.94(1.80%), 39.21(-4.80%) and 35.64(-13.48%) IU/ bag, respectively. Comparison of storage results between the two groups showed that the content of factor V was statistically significant(P<0.05) and significantly significant(P<0.01) at 4℃48 h and 22℃48 h, respectively, and the decay rate of factor V was faster when stored at 22℃; 3) When stored at 4℃, the Fbg content was 268.86, 268.17(-0.26%), 262.46(-2.38%), 270.50(0.61%), 267.52(-0.50%) and 261.92(-2.58%) mg/ bag, respectively; Stored at 22℃, the Fbg content was 268.86, 265.86(-1.12%), 264.12(-1.77%), 265.89(-1.11%), 266.04(-1.05%) and 261.04(-2.91%) mg/ bag, respectively. There was no statistical significance between the 2 groups and the original 0 h content in each time period(P>0.05). 【Conclusion】 After CAF melting, coagulation factor decreased with the extension of storage time, especially the decrease of factor Ⅷ, followed by factor V, while Fbg basically unchanged. Comparison between the two groups showed that, factor Ⅷ decay rate is slower, factor V decay rate is faster of storage at 22℃. CAF should be transfused as soon as possible after melting. If the delay is unavoidable, for the delay time less than 12 h, storage at 4℃ is recommended, fot the delay time more than 12 h and less than 24 h, storage at 22℃ is recommended.

Objective To investigate the effects of qigong abdominal breathing training on human brain function.Methods Seventy-two university students were recruited and randomly divided into the control and treatment groups in a 1:1 ratio. Both the control and treatment groups underwent the same standing pile work operation. However,only the treatment group received additional abdominal breathing training. The intervention process comprised two phases:2 weeks of intensive training and 6 weeks of counseling training. Electrocardiogram and electroencephalogram (EEG) tests were performed before (baseline period) and after training respectively. Sample entropy algorithm and empirical mode decomposition were used to analyze the EEG signals. The sample entropy complexity index and the correlation between EEG changes and respiratory curves were calculated to explore the brain function regulation effect. Results The complexity of different brain regions in the treatment group was higher than that of the control group after training. A large difference was observed when comparing the brain complexity in the temporoparietal junction,posterior temporal,parietal,parietal-occipital junction,and occipital regions. The brain complexity in the posterior temporal region of the treatment group was significantly higher than that of the control group after the intervention,with a significant difference (P<0.05). In the control group,the brain complexity in the frontal pole,anterior temporal,frontal reion,frontal-temporal junction,frontal-central junction,middle temporal,central,and temporal-parietal junction regions decreased to different degrees. However,the comparison between before and after was not significant. Furthermore,brain complexity in the central-parietal junction,posterior temporal,parietal,parietal-occipital junction,and occipital regions increased to different degrees in the control group;however,the difference was not significant. The brain complexity of the treatment group in the frontotemporal junction,middle temporal,and temporoparietal junction areas decreased slightly;however,the before-and-after comparison was not significant. The brain complexity of the treatment group in the frontal pole,frontotemporal,frontal,frontal-central junction,central,central-parietal junction,posterior-temporal,parietal,parietal-occipital junction,and occipital areas increased. The posterior-temporal,parietal,parietal-occipital junction,and occipital areas had more significant increases than the other areas. However,the before-and-after comparison was not significant. In both groups,brain complexity decreased in the frontotemporal junction,middle temporal,and temporoparietal junction areas and increased in the parietal,parieto-occipital junction,and occipital areas. The comparison of complexity between the treatment and control groups in P3 and PO3 leads after training was significant. P3 and PO3 are situated in the parietal region and parieto-occipital junction areas,respectively,indicating that antebellum breathing also affects brain function in these regions. The correlation between the respiratory curve and EEG components was enhanced after training. Conclusion Abdominal breathing training can significantly increase the complexity of the corresponding brain regions (posterior temporal,parietal,and parieto-occipital junction regions),and a significant correlation was observed between the two.

Objective To study the effects of different posterior slope installations of unicompartmental knee arthroplasty(UKA)prostheses on the loading and motion of the knee joint and insert wear.Methods A combined approach involving the UKA musculoskeletal multibody dynamic,finite element,and wear prediction models was used to investigate the effects of five different posterior slope installation positions of the UKA prosthesis on the postoperative knee joint force and motion,insert contact stress,linear wear depth,and wear volume.Results At a 0° posterior slope,the maximum von Mises stress of the insert was 24.84 MPa,maximum contact stress was 47.61 MPa,and volumetric wear after 5 million cycles(MC)was 47.29 mm3.As the posterior slope angle of the UKA prosthesis increased,the internal rotation and posterior translation during the gait cycle increased,the medial joint force during the swing phase increased,the von Mises and contact stresses of the insert after 5 MC decreased significantly,and the wear area,maximum linear wear depth,and volumetric wear volume of the insert were consequently reduced.Compared to the 0° posterior slope,the linear wear depths of the insert at the 3°,5°,and 7° posterior slopes decreased by 17.8％,19.2％,and 20.6％,respectively.The volumetric wear volumes of the inserts decreased by 24.5％,30.9％,and 34.3％,respectively.Conclusions Installing a UKA prosthesis with a posterior slope exceeding 3° significantly increases internal rotation and posterior translation during the gait cycle,further reducing the articular volumetric wear of the polyethylene insert.

Background and purpose:Chimeric antigen receptor T(CAR-T)cell therapy has shown remarkable efficacy in treating hematological and lymphatic system tumors,but its effectiveness in solid tumors is relatively poor,which is partly attributed to target selection.For Ewing sarcoma(ES),CD99 can be a potential target for CAR-T cells.However,due to T cells'endogenous expression of CD99 protein,CAR-T cells targeting CD99 face limitations in their expansion capacity in vitro.This study aimed to identify the optimal conditions for preparing CD99 CAR-T cells by incorporating CD99 knockdown short hairpin RNA(shRNA),optimizing the multiplicity of infection(MOI)for lentiviral transduction,and screening for the best culture medium and container for CAR-T cell expansion.Methods:shRNA sequences were screened to enhance the expansion capacity of CD99 CAR-T cells.Different MOI,culture media,and containers were used to assess CAR-T cell transduction efficiency,cell viability,proliferation capacity,specific killing ability,and interferon-γ(IFN-γ)release levels under various conditions,in order to identify the optimal cell preparation conditions.Results:The expansion level of KO-CD99 CAR-T cells obtained through shRNA knockdown was significantly higher than that of CD99 CAR-T cells[(16.40±0.40)vs(6.33±1.53),P<0.01].The optimal expansion effect was observed when the transduction MOI was between 0.25 and 1.0,and OptiVitro was used as the culture medium.CAR-T cells cultured in ventilated flasks exhibited significantly higher expansion rates compared to cells cultured in bags[MOI=0.25:(50.23±3.32)vs(13.02±4.82);MOI=0.50:(49.96±0.83)vs(18.25±2.88);MOI=1.00:(48.27±5.08)vs(13.16±6.26);P<0.01],with better cell phenotype and higher specific killing ability.Conclusion:KO-CD99 CAR-T cells obtained through shRNA technology can achieve stable expansion.Based on the optimization of expansion conditions,KO-CD99 CAR-T cells exhibit superior expansion capacity and a higher proportion of memory T cells when the MOI is between 0.25 and 1.00,OptiVitro is used as the culture medium,and ventilated flasks are used as the culture container.These findings lay a solid foundation for further clinical trials of CD99 CAR-T cell therapy for ES.