Objective: To explore the effect of replacing rice bowls with trays on controlling the salt intake among school aged children, providing new evidence and insights for salt reduction intervention. Methods: From April to May 2024, 373 students from grades 4-9 at a boarding school in Guizhou Province were enrolled through stratified random cluster sampling, with one intervention class and one control class per grade. During the intervention period for one month, and the types of meals provided, pricing standards, and dining procedures shall remain consistent with daily operations, the intervention group ( n =181) compartmentalized trays for lunch and dinner, while the control group ( n =192) still used a rice bowl. Pre and post intervention assessments included 24 hour urine collection, questionnaire surveys, and physical measurements. The difference in differences analysis combined with multiple linear regression was used to analyze the changes in sodium intake and to evaluate the net effect of the intervention. Results: The post intervention 24 hour sodium intake in the intervention group was ( 2 222.6 ±1 013.6) mg, an increase of 94.6 mg from baseline, with no statistically significant difference ( t=1.10, P >0.05). In contrast, the post intervention 24 hour sodium intake in the control group was (2 080.5±895.7) mg, a decrease of 190.8 mg from baseline, showing a statistically significant difference ( t=-2.39, P <0.05). The difference in differences results indicated that after adjusting the model for factors such as gender, grade and dietary behaviors affecting sodium intake, the intervention group showed a net increase of 232.5 mg [ β(95%CI )=232.5(-40.3-505.2)] in 24 hour sodium intake compared to the control group, with no statistically significant net effect ( P >0.05). Conclusions Merely changing tableware is insufficient to control children s salt intake effectively. Based on continuous practical explorations and evidence based research grounded in the nudge theory, multi dimensional measures such as salt reduction education and the construction of a supportive environment should be integrated to form an intervention system that achieves synergistic and enhanced effects.

OBJECTIVES: To investigate the effect of Shenge powder (SGP) on myocardial fibrosis in rats with heart failure after myocardial infarction and its relation with lysyl oxidase like protein 2 (LOXL2)/transforming growth factor-β1 (TGF-β1)/IL-11 signaling pathway. METHODS: Seventy-two SPF male SD rats were divided into blank control group, model control group, SGP small dose group, SGP large dose group, positive control group, SGP large dose+LOXL2 activator group, with 12 rats in each group. Except for the blank control group, post-myocardial infarction heart failure was induced by coronary constriction. Corresponding treatments were given immediately after successful modeling, once a day for 4 weeks. Left ventricular fractional shortening (LVFS) and left ventricular ejection fraction (LVEF) in rats were detected by color Doppler ultrasound imaging. Levels of IL-1β and IL-6 in serum were analyzed by ELISA method. Myocardial collagen volume fraction (CVF) was evaluated by Masson staining. Expressions of collagen Ⅰ and α-smooth muscle actin (α-SMA) in myocardial tissue were detected by immunohistochemical staining. The mRNA expressions of matrix metalloproteinase-9 (MMP-9) and tissue inhibitor of metalloproteinase 1 (TIMP-1) in myocardial tissue were detected by qRT-PCR. Expression of LOXL2, TGF-β1, and IL-11 proteins in myocardial tissue were detected by Western blotting. RESULTS: Compared with the blank control group, the LVFS and LVEF of the model control group decreased, the levels of serum IL-6 and IL-1β elevated, and the CVF value, the expressions of collagen Ⅰ and α-SMA in myocardial tissue, MMP-9 and TIMP-1 mRNA, and LOXL2, TGF-β1, IL-11 proteins increased (all P<0.05). Compared with the model control group, the LVFS and LVEF of SGP small dose group, SGP large dose group and positive control group increased, the levels of serum IL-6 and IL-1β decreased, and the CVF value, the expressions of collagen Ⅰ and α-SMA in myocardial tissue, MMP-9 and TIMP-1 mRNA, and LOXL2, TGF-β1, IL-11 proteins decreased (all P<0.05); while LOXL2 activator reversed the improvement effect of high-dose SGP on myocardial fibrosis in heart failure rats after myocardial infarction. CONCLUSIONS Shenge powder may inhibit myocardial fibrosis in heart failure rats after myocardial infarction by inhibiting the LOXL2/TGF-β1/IL-11 pathway.
Animals ; Male ; Rats, Sprague-Dawley ; Myocardial Infarction/complications* ; Transforming Growth Factor beta1/metabolism* ; Signal Transduction/drug effects* ; Drugs, Chinese Herbal/therapeutic use* ; Rats ; Heart Failure/pathology* ; Myocardium/metabolism* ; Fibrosis ; Amino Acid Oxidoreductases/metabolism* ; Interleukin-11/metabolism* ; Tissue Inhibitor of Metalloproteinase-1/metabolism* ; Matrix Metalloproteinase 9/metabolism*

OBJECTIVE: To investigate the biological behavior, differentiation ability, and differential gene expression of lymph node mesenchymal stem cells (MSCs) in patients with diffuse large B-cell lymphoma (DLBCL) and reactive lymphoid hyperplasia (RLH), providing a theoretical basis for clinical chemotherapy resistance. METHODS: Lymph node MSCs from patients with DLBCL and RLH were separated, passaged and cultured. The cell morphology and growth status were observed. Flow cytometry was performed to detect the immune phenotype of MSCs. The in vitro directed differentiation ability of the two types of MSCs was observed. High-throughput sequencing was used to analyze the differential gene expression and enrichment of two groups of MSCs. RESULTS: The lymph node MSCs of patients with DLBCL and RLH had similar cell morphology and growth characteristics, and both groups of MSCs expressed CD90, CD105, and CD73 on the cell surface. Compared with lymph node MSCs derived from patients with RLH, lymph node MSCs derived from DLBCL patients showed stronger osteogenic and adipogenic differentiation abilities. High-throughput sequencing results displayed that lymph node MSCs derived from DLBCL patients significantly upregulated some genes such as TOP2A, LFNG, GRIA3, SEC14L2, SPON2, AURKA, LRRC15, FOXD1, HOXC9, CDC20 and remarkably downregulated some genes such as TBC1D8, LDLR, PCDHAC2, POLH, PKP2, ANKRD37, DMKN, HSD11B1, ARHGAP20, PTGS1,etc. CONCLUSION Lymph node MSCs in DLBCL patients exhibit unique biological behavior and gene expression profiles, which may be closely related to clinical chemotherapy resistance.
Humans ; Mesenchymal Stem Cells/cytology* ; Lymphoma, Large B-Cell, Diffuse/pathology* ; Cell Differentiation ; Lymph Nodes/pathology* ; Pseudolymphoma/pathology*

Ischemic stroke (IS) is a globally life-threatening disease. Presently, few therapeutic medicines are available for treating IS, and rt-PA is the only drug approved by the US Food and Drug Administration (FDA) in the US. In fact, many agents showing excellent neuroprotection but no blood flow-improving activity in animals have not achieved ideal clinical efficacy, while thrombolytic drugs only improving blood flow without neuroprotection have limited their wider application. To address these challenges and meet the huge unmet clinical need, we have designed and identified a novel compound AAPB with dual effects of neuroprotection and cerebral blood flow improvement. AAPB significantly reduced cerebral infarction and neural function deficit in tMCAO rats, pMCAO rats, and IS rhesus monkeys, as well as displayed exceptional safety profiles and excellent pharmacokinetic properties in rats and dogs. AAPB has now entered phase I of clinical trials fighting IS in China.

The release of the Measures of Ethical Review of Life Sciences and Medical Research Involving Humans has brought new requirements to the field of ethical review in health management research.Based on the background of new regulations and combining the characteristics of the health management discipline,this paper explored the needs and necessity of ethical review in health management research.In the Measures,the ethical governance of health management research was updated,the concept of exemption from the ethical review was put forward,as well as the importance of protecting the rights and interests of research participants and the protection of personal information were emphasized.This paper also explored the ethical review framework for health management research,including the formulation of operational standards for exemption from ethical review,the refinement of standardized ethical review work systems and processes,and the clarification of information data source verification.These explorations aimed to provide an ethical guarantee for health management research,promote its healthy development,and ensure that the rights and interests of research participants are fully respected and protected.Through research,it is hoped that the ethical level of health management research can be further improved,promoting the development of the discipline and social progress.

To addresses the issues of low contrast and inaccurate segmentation of tiny vessels in retinal images,a U-shaped network incorporating multi-level residuals and three-space attention mechanism is proposed.In encoding stage,a multi-level residual module is added after inputting original images for preserving image features,and additionally,batch normalization and Dropout are integrated into the residual module to prevent vanishing gradient and feature data redundancy within the deep network.In decoding stage,a three-space attention mechanism is adopted to assign different weights to the features from the original images,down-sampled images,and up-sampled images,thus enhancing feature texture and position information,and achieving precise segmentation of tiny blood vessels.Experimental results on a public color fundus image dataset demonstrate that the proposed algorithm achieves higher accuracy(0.985),specificity(0.991),sensitivity(0.829),and AUC(0.985)than the existing algorithms.Moreover,the vessel maps obtained by the comparison with the gold standard are of significant reference value in clinic.

To address the challenge of unclear features and difficulties in pulmonary nodule CT image detection,an efficient attention feature pyramid network is proposed.The network firstly employs a feature pyramid of multi-scale feature fusion as the backbone network for effectively preserving both low-and high-level features,and uses the depthwise separable convolutional neural network to extract feature information.Then,the attention mechanism is integrated into the backbone network for assigning weights to salient feature information.Finally,the proposed algorithm is applied to Lung-PET-CT-Dx dataset and Luna16 dataset,and the experimental results demonstrate that the proposed algorithm has higher precision,recall rate and mAP value than the existing comparative algorithms,substantiating its superiority in pulmonary nodule detection.

This study aims to analyze the main drug resistance mechanism of Salmonella enteritidis induced by polymyxin in vitro.In this study,the resistance of Salmonella enteritidis CMCC(B)50335(ZK)to polymyxin was induced in vitro,and the growth characteristics,exercise ability,ul-trastructure and sensitivity to 16 antimicrobial agents before and after induction were determined by turbidimetry,semi-solid agar method,transmission electron microscope and disk diffusion method,and the whole genome and single nucleotide polymorphism(SNP)were detected by Illu-mina NovaSeq PE150 method.RT-qPCR was used to detect the differences in the expression levels of six drug-resistant related genes.The recombinant strain △phoPE1-128-1,which induced drug-resistant strain E1-128-1,was constructed by homologous recombination of Red Escherichia coli,and its sensitivity to polymyxin was detected.The results showed that three strains of induced drug-resistant bacteria E1-128-1,E1-128-3 and E2-128-3 were screened out,and the MIC increased by 128,64 and 64 times respectively after drug resistance stability test.Induced drug resistance had no significant effect on the growth ability of the tested bacteria and the sensitivity of 16 antibacte-rial drugs.The exercise ability of E1-128-1was significantly increased,and the cell wall and plasma membrane obviously thicken.There was no significant difference in the genome components of E1-128-1 before and after induction,but eight missense mutations of six drug-resistance related genes,including phoP/phoQ,cpxP,lptD,csrA and acrB,were detected,including four missense mutation sites of phoP,namely Leu185Trp,His189Ser,Thr190Tyr and Ile191His.The corresponding genes were sequenced by PCR,and the results were consistent with those of SNP.RT-qPCR results showed that the expression levels of mutant genes of the three induced strains increased signifi-cantly.Compared with E1-128-1,the MIC of △phoP E1-128-1 decreased to 1 mg/L.It is sug-gested that the mutation and increased expression of phoP gene are important factors for inducing polymyxin resistance of Salmonella CMCC(B)50335 in vitro.

Objective To explore the application value of low-flow rate and-contrast injection scheme for pulmonary artery computed tomography angiography(CTA)in the elderly patients.Methods Sixty elderly patients undergoing pulmonary artery CTA in some hospital from April 2020 to January 2023 were selected and divided into a control group(30 cases)and an experimental group(30 cases)according to the contrast agent injection schemes.A conventional contrast injection scheme was used for the control group,and an optimized contrast injection scheme with low flow rate and low contrast dose was designed for the experimental group.The two gorups were observed and subjectively scored in terms of the degree of pulmonary artery enhancement,the display of pulmonary artery trunks and branches and the sharpness of image vessel edges,and objectively evaluated for the degree of contrast sclerosis artifacts in the superior vena cava and the enhancement CT values of the pulmonary artery trunks and the left and the right pulmonary veins.The extravasation of the contrast agent was recorded for the patients in the 2 groups.SPSS 25.0 software was used for statistical analysis.Results The two groups had no significant differences in score pulmonary artery CTA image quality(P＞0.05);the experimental group had the socre of contrast sclerosis artifacts in the superior vena cava statistically lower than that of the control group(P＜0.05).The two groups had no obvious differences in the CT values of the pulmonary artery trunks and the left and the right pulmonary veins(P＞0.05).There were no patients with the extravasation of the contrast agent found in the experimental group,while there one case with severe extravasation and 4 cases with mild or moderate extravasation in the control group.Conclusion Low-flow rate and-contrast injection scheme for pulmonary artery CTA of the elderly patients contributes to avoiding contrast agent extrava-sation while ensuring image quality,enhancing patient experience and safety.[Chinese Medical Equipment Journal,2024,45(10):66-70]

Activation of nuclear factor erythroid 2-related factor 2(Nrf2)by Kelch-like ECH-associated protein 1(Keap1)alkylation plays a central role in anti-inflammatory therapy.However,activators of Nrf2 through alkylation of Keap1-Kelch domain have not been identified.Deoxynyboquinone(DNQ)is a natural small molecule discovered from marine actinomycetes.The current study was designed to investigate the anti-inflammatory effects and molecular mechanisms of DNQ via alkylation of Keap1.DNQ exhibited signif-icant anti-inflammatory properties both in vitro and in vivo.The pharmacophore responsible for the anti-inflammatory properties of DNQ was determined to be the α,β-unsaturated amides moieties by a chemical reaction between DNQ and N-acetylcysteine.DNQ exerted anti-inflammatory effects through activation of Nrf2/ARE pathway.Keap1 was demonstrated to be the direct target of DNQ and bound with DNQ through conjugate addition reaction involving alkylation.The specific alkylation site of DNQ on Keap1 for Nrf2 activation was elucidated with a synthesized probe in conjunction with liquid chromatography-tandem mass spectrometry.DNQ triggered the ubiquitination and subsequent degra-dation of Keap1 by alkylation of the cysteine residue 489(Cys489)on Keap1-Kelch domain,ultimately enabling the activation of Nrf2.Our findings revealed that DNQ exhibited potent anti-inflammatory capacity through α,β-unsaturated amides moieties active group which specifically activated Nrf2 signal pathway via alkylation/ubiquitination of Keap1-Kelch domain,suggesting the potential values of targeting Cys489 on Keap1-Kelch domain by DNQ-like small molecules in inflammatory therapies.