1.Establishment and Evaluation of an Oxidative Stress Model of Atopic Dermatitis Induced by 2,4-dinitrofluorobenzene
Chang LIU ; Xuesong XIANG ; Huihuang HE ; Xiaoqing CHEN ; Wenhong QIU
Laboratory Animal and Comparative Medicine 2026;46(1):46-54
Objective To establish an oxidative stress mouse model of atopic dermatitis (AD) by applying 2,4-dinitrofluorobenzene (DNFB) to the back and post-auricular skin of KM mice, and to evaluate the regulatory role of the RAGE-NLRP3 axis (receptor for advanced glycation end products-NOD-like receptor family, pyrin domain containing 3 axis) in AD-related oxidative stress, thereby providing a potential therapeutic target for AD treatment. Methods Twenty SPF-grade female KM mice were randomly divided into a control group (Control group) and an experimental group (DNFB group), with 10 mice in each group. Mice in the Control group were treated with an acetone-olive oil vehicle (acetone: olive oil = 3:1) on their back and post-auricular skin. Mice in the DNFB group were treated with 0.5% DNFB (prepared by adding 0.5 g DNFB per 100 mL of acetone-olive oil vehicle) on the same areas, once daily for 14 consecutive days. The severity of skin lesions was scored on days 2, 4, 6, 9, 12, and 14 of treatment. On day 14, scratching behavior and ear thickness were evaluated. Ear swelling was evaluated on the final day by measuring bilateral ear thickness three times with a vernier caliper; the three measurements were averaged. HE staining was used to observe morphological and structural changes of cells in the back skin tissues. The mRNA and protein expression levels of RAGE (receptor for advanced glycation end products) in skin tissues were detected by quantitative real-time PCR, Western blot, and immunohistochemical staining. The mRNA expression levels of oxidative stress-related molecules, including NLRP3 (NOD-like receptor family, pyrin domain containing 3), caspase-1 (cysteine-dependent aspartate-specific protease 1), and IL-1β (Interleukin-1β), were detected by quantitative real-time PCR. Results On day 14, the back skin lesion scores of the Control group and DNFB group were (0.20±0.42) and (9.93±1.30) (P<0.000 1), respectively. Scratching behavior scores were (5.00±2.05) and (49.26±8.49) episodes, respectively (P<0.000 1), and ear thicknesses were (213.00±11.87) μm and (765.93±140.47) μm (P<0.000 1), respectively. The DNFB group exhibited marked skin dryness, desquamation, and thickening. HE staining results showed that skin inflammation was obvious in the DNFB group, consistent with the pathological features of AD. Quantitative real-time PCR and Western blot results showed that compared with the Control group, the mRNA expression level of RAGE in skin tissues of the DNFB group was significantly increased (P<0.05), and the protein expression level of RAGE was also significantly increased (P<0.01). Immunohistochemical staining results showed that compared with the Control group, skin tissue sections of the DNFB group exhibited thickened stratum corneum and fibrotic proliferation of fibroblasts in the interstitium under microscopic observation, with a significant increase in RAGE protein expression in the skin tissues (P<0.01). Quantitative real-time PCR results showed that the mRNA expression levels of NLRP3, caspase-1, and IL-1β in skin tissues of the DNFB group were all significantly increased (P<0.01). Conclusion The AD mouse oxidative stress model has been successfully established by topical DNFB application. RAGE may promote the development of AD by regulating the NLRP3 inflammasome and IL-1β release, forming an oxidative-inflammatory cascade, suggesting that it could be a potential therapeutic target for AD.
2.Optimization of Quality Standards for Polygalae Radix Based on Characteristic Chromatograms and QAMS for Xanthones
Humin XIE ; Xiaoqing CUI ; Weihong FENG ; Yu LU ; Xiaoqian LIU ; Xiaoli SUN ; Yanrong LI ; Zhimin WANG ; Chun LI
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(9):196-204
ObjectiveTo address the limitations of the current quality standard for Polygalae Radix(PR), which relies on a single component for quality assessment and struggles to holistically control its intrinsic quality, by constructing a comprehensive quality evaluation system integrating "macro-characterization of chemical profile, synchronous quantification of multiple index components, and quantitative analysis of multi-components by single marker(QAMS) for key component groups". This study aims to facilitate the scientific revision of the quality standard for PR. MethodsHigh performance liquid chromatography(HPLC) characteristic chromatograms were established for 11 batches of PR medicinal materials(YZ), 10 batches of PR decoction pieces(YP), and 10 batches of licorice-processed PR decoction pieces(ZYZ), followed by similarity evaluation and identification of common peaks. HPLC-QAMS was developed for xanthones(sibiricaxanthone B, polygalaxanthone Ⅺ, polygalaxanthone Ⅲ) in the characteristic chromatograms. Simultaneously, the external standard method(ESM) was used to determine the contents of the corresponding xanthones and 3,6'-disinapoyl sucrose in YZ, YP, and ZYZ, followed by multivariate statistical analysis and Spearman correlation analysis. ResultsThe similarity between the characteristic chromatograms of 31 batches of PR samples and the reference chromatogram was>0.9. A total of 13 common peaks were identified, and 10 of these peaks were characterized through reference standard comparison. The successfully constructed QAMS method showed that the relative correction factors(RCFs) of sibiricaxanthone B and polygalaxanthone Ⅺ to polygalaxanthone Ⅲ were 0.76 and 0.88, and their relative retention times(RRTs) were 0.85 and 0.97, respectively. The results calculated by the QAMS method showed no significant difference from those obtained by the ESM. According to the limit standard for polygalaxanthone Ⅲ in the 2020 edition of the Pharmacopoeia of the People's Republic of China(hereinafter referred to as the Chinese Pharmacopoeia), the pass rate of 31 batches of samples was only 19.35%. Multivariate statistical analysis indicated certain compositional differences between different batches of YZ and YP, as well as between YP and ZYZ, with 3,6'-disinapoyl sucrose identified as the main differentiating component. Furthermore, correlation analysis revealed that the content of polygalaxanthone Ⅲ was positively correlated with the contents of sibiricaxanthone B and polygalaxanthone Ⅺ, but showed no association with the content of 3,6'-disinapoyl sucrose. ConclusionIt is recommended that the content limit for polygalaxanthone Ⅲ in YZ,YP and ZYZ be revised to not less than 0.07%, or the total content of polygalaxanthone Ⅲ, sibiricaxanthone B and polygalaxanthone Ⅺ be not less than 0.18%. The newly established triple quality control model of "holistic control via characteristic chromatograms, precise quantification of oligosaccharide esters, and efficient detection of xanthones by QAMS" provides a systematic and precise solution for quality evaluation of PR and similar Chinese herbal medicines.
3.Arginine Metabolic Disorder in Heart Failure Rats: Analysis Based on Targeted Metabolomics and Bioinformatics
Zeyu LI ; Xiaoqing WANG ; Zhengyu FANG ; Yurou ZHAO ; He XIAO ; Penghaobang LIU ; Haiming ZHANG ; Chunyan LIU ; Yanhong HU
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(10):229-237
ObjectiveThis study systematically analyzed the arginine metabolic dysregulation in the rat model of heart failure (HF), providing a modern scientific basis for elucidating the pathogenesis of HF and offering new insights for the prevention and treatment of HF with traditional Chinese medicine (TCM). MethodsA thoracotomy was performed to ligate the left anterior descending coronary artery of rats, which induced acute myocardial ischemia and thus led to the development of post-myocardial infarction heart failure. The rats were divided into a sham surgery group and a model group, with eight rats in each group. Serum targeted metabolomics analysis was performed using ultra-performance liquid chromatography-triple quadrupole mass spectrometry (UPLC-TQ-S), and the spatial distribution of metabolites in cardiac tissue was observed using airflow-assisted desorption electrospray ionizationmass spectrometry imaging (AFADESI-MSI). Targets associated with HF and arginine metabolism were screened from databases including GeneCards and the Gene Expression Omnibus (GEO), a protein-protein interaction (PPI) network was constructed, and enrichment analysis of the Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway and Gene Ontology (GO) was performed. Finally, molecular docking was conducted to verify the binding between core metabolic components and key targets, and potential TCMs were predicted based on the core pathways and targets. ResultsCompared with the sham surgery group, the levels of arginine and citrulline in the serum of model rats were significantly decreased (P<0.01), while those of proline, ornithine, creatine, creatinine and glutamate were significantly increased (P<0.05, P<0.01). Cardiac mass spectrometry imaging showed a decreased abundance of arginine in the local myocardial tissue. Bioinformatics analysis identified 24 core functional targets, such as the angiotensin-converting enzyme (ACE), neuronal nitric oxide synthase (NOS1), 5-hydroxytryptamine receptor 2A (HTR2A), and epidermal growth factor receptor (EGFR), and enrichment analysis indicated that these targets were significantly involved in the calcium signaling pathway, neuroactive ligand-receptor interactions, and phosphatidylinositol signaling pathway. Molecular docking confirmed strong binding activities between arginine, citrulline and HTR2A, as well as between creatine, creatinine and EGFR. Based on pathway-target prediction, potential TCM interventions, such as ginseng and magnolia, were identified. ConclusionThis study revealed characteristic arginine metabolic disorder in HF, and the core targets of HF were closely associated with the phosphatidylinositol signaling pathway. It provides a modern biological interpretation of the pathogenesis of HF in TCM from the perspectives of metabolites and signaling pathways, and offers valuable insights for targeted therapy of HF and the development of TCM.
4.Arginine Metabolic Disorder in Heart Failure Rats: Analysis Based on Targeted Metabolomics and Bioinformatics
Zeyu LI ; Xiaoqing WANG ; Zhengyu FANG ; Yurou ZHAO ; He XIAO ; Penghaobang LIU ; Haiming ZHANG ; Chunyan LIU ; Yanhong HU
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(10):229-237
ObjectiveThis study systematically analyzed the arginine metabolic dysregulation in the rat model of heart failure (HF), providing a modern scientific basis for elucidating the pathogenesis of HF and offering new insights for the prevention and treatment of HF with traditional Chinese medicine (TCM). MethodsA thoracotomy was performed to ligate the left anterior descending coronary artery of rats, which induced acute myocardial ischemia and thus led to the development of post-myocardial infarction heart failure. The rats were divided into a sham surgery group and a model group, with eight rats in each group. Serum targeted metabolomics analysis was performed using ultra-performance liquid chromatography-triple quadrupole mass spectrometry (UPLC-TQ-S), and the spatial distribution of metabolites in cardiac tissue was observed using airflow-assisted desorption electrospray ionizationmass spectrometry imaging (AFADESI-MSI). Targets associated with HF and arginine metabolism were screened from databases including GeneCards and the Gene Expression Omnibus (GEO), a protein-protein interaction (PPI) network was constructed, and enrichment analysis of the Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway and Gene Ontology (GO) was performed. Finally, molecular docking was conducted to verify the binding between core metabolic components and key targets, and potential TCMs were predicted based on the core pathways and targets. ResultsCompared with the sham surgery group, the levels of arginine and citrulline in the serum of model rats were significantly decreased (P<0.01), while those of proline, ornithine, creatine, creatinine and glutamate were significantly increased (P<0.05, P<0.01). Cardiac mass spectrometry imaging showed a decreased abundance of arginine in the local myocardial tissue. Bioinformatics analysis identified 24 core functional targets, such as the angiotensin-converting enzyme (ACE), neuronal nitric oxide synthase (NOS1), 5-hydroxytryptamine receptor 2A (HTR2A), and epidermal growth factor receptor (EGFR), and enrichment analysis indicated that these targets were significantly involved in the calcium signaling pathway, neuroactive ligand-receptor interactions, and phosphatidylinositol signaling pathway. Molecular docking confirmed strong binding activities between arginine, citrulline and HTR2A, as well as between creatine, creatinine and EGFR. Based on pathway-target prediction, potential TCM interventions, such as ginseng and magnolia, were identified. ConclusionThis study revealed characteristic arginine metabolic disorder in HF, and the core targets of HF were closely associated with the phosphatidylinositol signaling pathway. It provides a modern biological interpretation of the pathogenesis of HF in TCM from the perspectives of metabolites and signaling pathways, and offers valuable insights for targeted therapy of HF and the development of TCM.
5.An excerpt of ACR appropriateness criteria® for chronic pancreatitis (2026)
Yuhao LIU ; Liang ZHU ; Xiaoqing LI ; Aiming YANG
Journal of Clinical Hepatology 2026;42(7):1568-1571
The American College of Radiology recently published the appropriateness criteria for initial imaging assessment of chronic pancreatitis (CP) and acute inflammation superimposed on CP (ACP). These criteria systematically elaborate on the role of various imaging modalities in diagnosing CP and ACP, assessing disease severity, identifying underlying causes, and evaluating complications, in order to provide guidance for effective management of CP patients through early and accurate imaging techniques and with reference to clinical and laboratory assessments. This article gives an excerpt of the key statements from the criteria.
6.Expert consensus on basic public services for vision health management of primary and secondary school students
YANG Lihua , WU Xi, TAO Shuman, YAO Jun, WU Fengbo, LIU Fangli, MA Yinghua, FENG Zhanchun, SUN Renbiao, LIU Dongru, CHEN Qiusheng, CHEN Jie, YU Yizhen, ZHANG Mingchang, WU Xiaoyan, DU Yukai, LI Xiaoqing, LI Li, WU Xixi, JIN Xiaoqin, XU Ting, WU Mengjia, TANG Jia, Society of Student Vision Health Management of Chinese Health Association, Vision Health Branch of Chinese Association for Student Nutrition & ; Health Promotion
Chinese Journal of School Health 2026;47(8):1069-1074
Abstract
To clarify the service targets, service contents, and safeguard mechanisms of the basic public service program for student vision health management, the study grounded in the current status of child and adolescent myopia prevention and control in China and integrated with the practical experience and innovative practices of Wuhan National Demonstration Area for Student Vision Health Management, takes education as the main thread and schools as the base, consolidating resources from multiple stakeholders including education administrative departments, schools, families, and professional technical service institutions. Centering on four core components—vision health education, monitoring and record keeping, risk prevention and control, and dynamic management, the study constructs a multi tiered basic public service system for vision health management of primary and secondary school students. It further proposes the use of an intelligent management platform and a "three tier color coded early warning" mechanism (red, yellow, blue) to prevent and control student myopia at the source, providing schools with replicable and operable implementation pathways to enhance the level of student vision health management.
7.Mechanistic Study on Effect of Cycloastragenol in Improving Mitochondrial Function and Inhibiting Cardiac Remodeling via GPCR/cAMP/PKA/CREB Signaling Pathway
Dongsheng WEI ; Menglan ZHAO ; Wenhao GU ; Jinpu LIANG ; Yu LIU ; Xiaoqing ZHANG
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(20):112-121
ObjectiveThis study aimed to evaluate the effects of cycloastragenol (CAG) on mitochondrial dysfunction during cardiac remodeling and to elucidate its regulatory role in myocardial energy metabolic homeostasis and the associated transcriptional regulatory axis. MethodsA rat model of heart failure (HF) was established by ligation of the left anterior descending coronary artery. Rats were randomly divided into a control group, a model group, a captopril group (3.25 mg·kg-1), a low-dose CAG group (10 mg·kg-1, CAG-L), and a high-dose CAG group (20 mg·kg-1, CAG-H). After 28 days of treatment, left ventricular ejection fraction (LVEF), left ventricular fractional shortening (LVFS), left ventricular end-diastolic diameter (LVIDd), and left ventricular end-systolic diameter (LVIDs) were assessed by echocardiography. Serum levels of N-terminal pro-brain natriuretic peptide (NT-proBNP), creatine kinase-MB (CK-MB), cardiac troponinⅠ (cTnI), interleukin-1β (IL-1β), interleukin-6 (IL-6), tumor necrosis factor-α (TNF-α), and cyclic adenosine monophosphate (cAMP) were measured by enzyme-linked immunosorbent assay (ELISA). Hematoxylin-eosin (HE) and Masson's trichrome staining were used to evaluate myocardial histopathology and fibrosis. Wheat germ agglutinin (WGA), reactive oxygen species (ROS), and terminal deoxynucleotidyl transferase-mediated dUTP nick-end labeling (TUNEL) staining were performed to assess cardiomyocyte hypertrophy, oxidative stress, and apoptosis. Adenosine triphosphate (ATP) content and the activities of mitochondrial respiratory chain complexes Ⅰ-Ⅳ were determined by colorimetric assays. The mRNA expression of α-smooth muscle actin (α-SMA), Col Ⅰ, and Col Ⅲ was detected by Real-time quantitative polymerase chain reaction (Real-time PCR), while the protein levels of β2-adrenergic receptor (ADRB2), protein kinase A (PKA), phosphorylated cAMP response element-binding protein/total cAMP response element-binding protein (p-CREB/CREB), peroxisome proliferator-activated receptor γ coactivator-1α (PGC-1α), nuclear respiratory factor 1 (NRF1), and mitochondrial transcription factor A (TFAM) were analyzed by Western blot. ResultsCompared with the control group, the model group exhibited significantly decreased LVEF, LVFS, and ATP levels (P<0.05), and markedly increased LVIDd, LVIDs, NT-proBNP, CK-MB, cTnI, IL-1β, IL-6, TNF-α, ROS levels, TUNEL-positive rate, Col deposition area, and the mRNA expression of α-SMA, Col Ⅰ, and Col Ⅲ (P<0.05). In addition, the activities of mitochondrial respiratory chain complexes Ⅰ-Ⅳ, the protein expression of ADRB2, PKA, p-CREB, PGC-1α, NRF1, and TFAM, as well as the cAMP content, were significantly reduced (P<0.05). Compared with the model group, both low- and high-dose CAG significantly increased LVEF and LVFS, and decreased LVIDd, LVIDs, and the levels of NT-proBNP, CK-MB, and cTnI (P<0.05). CAG treatment alleviated myocardial disarray and Collagen deposition, and downregulated the mRNA expression of α-SMA, Col Ⅰ, and Col Ⅲ. The treatment markedly reduced ROS generation and the TUNEL-positive rate (P<0.05), thereby attenuating cardiomyocyte hypertrophy and inflammatory responses. Furthermore, CAG treatment increased ATP content and the activities of mitochondrial respiratory chain complexes Ⅰ-Ⅳ, accompanied by upregulation of PGC-1α, NRF1, TFAM, ADRB2, PKA, and p-CREB protein expression as well as cAMP levels (P<0.05). The CAG-H group showed the most pronounced improvements, which were superior to those of the captopril group and the CAG-L group. ConclusionCycloastragenol delays adverse cardiac remodeling and improves cardiac function by activating the ADRB2-mediated GPCR/cAMP/PKA/CREB signaling pathway, enhancing the PGC-1α/NRF1/TFAM activity, promoting mitochondrial energy metabolism remodeling, and suppressing oxidative stress, inflammation, and myocardial fibrosis.
8.Mechanistic Study on Effect of Cycloastragenol in Improving Mitochondrial Function and Inhibiting Cardiac Remodeling via GPCR/cAMP/PKA/CREB Signaling Pathway
Dongsheng WEI ; Menglan ZHAO ; Wenhao GU ; Jinpu LIANG ; Yu LIU ; Xiaoqing ZHANG
Chinese Journal of Experimental Traditional Medical Formulae 2026;32(20):112-121
ObjectiveThis study aimed to evaluate the effects of cycloastragenol (CAG) on mitochondrial dysfunction during cardiac remodeling and to elucidate its regulatory role in myocardial energy metabolic homeostasis and the associated transcriptional regulatory axis. MethodsA rat model of heart failure (HF) was established by ligation of the left anterior descending coronary artery. Rats were randomly divided into a control group, a model group, a captopril group (3.25 mg·kg-1), a low-dose CAG group (10 mg·kg-1, CAG-L), and a high-dose CAG group (20 mg·kg-1, CAG-H). After 28 days of treatment, left ventricular ejection fraction (LVEF), left ventricular fractional shortening (LVFS), left ventricular end-diastolic diameter (LVIDd), and left ventricular end-systolic diameter (LVIDs) were assessed by echocardiography. Serum levels of N-terminal pro-brain natriuretic peptide (NT-proBNP), creatine kinase-MB (CK-MB), cardiac troponinⅠ (cTnI), interleukin-1β (IL-1β), interleukin-6 (IL-6), tumor necrosis factor-α (TNF-α), and cyclic adenosine monophosphate (cAMP) were measured by enzyme-linked immunosorbent assay (ELISA). Hematoxylin-eosin (HE) and Masson's trichrome staining were used to evaluate myocardial histopathology and fibrosis. Wheat germ agglutinin (WGA), reactive oxygen species (ROS), and terminal deoxynucleotidyl transferase-mediated dUTP nick-end labeling (TUNEL) staining were performed to assess cardiomyocyte hypertrophy, oxidative stress, and apoptosis. Adenosine triphosphate (ATP) content and the activities of mitochondrial respiratory chain complexes Ⅰ-Ⅳ were determined by colorimetric assays. The mRNA expression of α-smooth muscle actin (α-SMA), Col Ⅰ, and Col Ⅲ was detected by Real-time quantitative polymerase chain reaction (Real-time PCR), while the protein levels of β2-adrenergic receptor (ADRB2), protein kinase A (PKA), phosphorylated cAMP response element-binding protein/total cAMP response element-binding protein (p-CREB/CREB), peroxisome proliferator-activated receptor γ coactivator-1α (PGC-1α), nuclear respiratory factor 1 (NRF1), and mitochondrial transcription factor A (TFAM) were analyzed by Western blot. ResultsCompared with the control group, the model group exhibited significantly decreased LVEF, LVFS, and ATP levels (P<0.05), and markedly increased LVIDd, LVIDs, NT-proBNP, CK-MB, cTnI, IL-1β, IL-6, TNF-α, ROS levels, TUNEL-positive rate, Col deposition area, and the mRNA expression of α-SMA, Col Ⅰ, and Col Ⅲ (P<0.05). In addition, the activities of mitochondrial respiratory chain complexes Ⅰ-Ⅳ, the protein expression of ADRB2, PKA, p-CREB, PGC-1α, NRF1, and TFAM, as well as the cAMP content, were significantly reduced (P<0.05). Compared with the model group, both low- and high-dose CAG significantly increased LVEF and LVFS, and decreased LVIDd, LVIDs, and the levels of NT-proBNP, CK-MB, and cTnI (P<0.05). CAG treatment alleviated myocardial disarray and Collagen deposition, and downregulated the mRNA expression of α-SMA, Col Ⅰ, and Col Ⅲ. The treatment markedly reduced ROS generation and the TUNEL-positive rate (P<0.05), thereby attenuating cardiomyocyte hypertrophy and inflammatory responses. Furthermore, CAG treatment increased ATP content and the activities of mitochondrial respiratory chain complexes Ⅰ-Ⅳ, accompanied by upregulation of PGC-1α, NRF1, TFAM, ADRB2, PKA, and p-CREB protein expression as well as cAMP levels (P<0.05). The CAG-H group showed the most pronounced improvements, which were superior to those of the captopril group and the CAG-L group. ConclusionCycloastragenol delays adverse cardiac remodeling and improves cardiac function by activating the ADRB2-mediated GPCR/cAMP/PKA/CREB signaling pathway, enhancing the PGC-1α/NRF1/TFAM activity, promoting mitochondrial energy metabolism remodeling, and suppressing oxidative stress, inflammation, and myocardial fibrosis.
9.Whole genomic analysis of 8 strains of H9N2 subtype avian influenza virus isolates from live poultry markets in Yunnan, 2023
LIU Zhaosheng ; FU Xiaoqing ; LUO Chunrui
China Tropical Medicine 2025;25(3):350-
Objective To conduct an in-depth study of the molecular biological characteristics and evolutionary trends of H9N2 avian influenza virus (AIV) in live poultry markets in Yunnan Province in 2023, and to provide scientific evidence for the development of control strategies for H9N2 avian influenza in the region. Methods Environmental samples were collected from live poultry markets in Yunnan Province in 2023 for H9N2 subtype nucleic acid detection. Positive samples were subjected to virus isolation using chicken embryos, and the genome of the 8 isolated strains was amplified, sequenced, and analyzed for genetic characteristics. Results The eight avian influenza virus (AIV) isolates had the hemagglutinin (HA) cleavage site sequence PSRSSRGLF, which is a non-continuous basic amino acid sequence, consistent with the genetic characteristics of typical low-pathogenicity avian influenza viruses. Mutations Q234L and H191N were observed in the left arm of the HA protein, which enhanced the affinity for α-2,6 sialic acid receptors, suggesting that these viruses may have the potential to infect humans. The neuraminidase (NA) protein exhibited a deletion of three amino acids (TEI) at positions 62–64 in the stalk region, displaying characteristics of high pathogenicity at the molecular level. The increase or absence in potential glycosylation sites were observed in both HA and NA genes. The non-structural protein 1 (NS1) showed no D92E mutation, and had a C-terminal truncation of 13 amino acids, indicating that this virus is of low pathogenicity and poses a lower risk of human transmission. Mutations T37A, R95K, S224N, and K242N in the M1 protein of some isolates increased the risk of infection, while one isolate carried the V27A or S31N mutation in the M2 protein, conferring resistance to M2 ion channel inhibitors. Mutations M317I and S678N were identified in the PB1 protein, which may enhance pathogenicity in mice and increase the potential for mammalian infection. The PB2 protein carried the I292V mutation, which exhibited a stronger infectivity to mammals. Phylogenetic analysis revealed that the HA, NA, and PB2 gene segments belonged to the Y280 lineage, NP and PB1 gene segments were classified under the F98 lineage, the M gene segment of the NH013 isolate belonged to the F98 lineage, while M genes, as well as the NS and PA genes of other isolates belonged to the G1 lineage. Conclusions These eight AIV isolates exhibited characteristics of low pathogenicity, but simultaneously carry the potential risk of infecting humans. Despite the HA cleavage site and NS1 protein mutations indicating low pathogenicity, the Q234L and H191N mutations in the HA protein enhanced its affinity for human receptors, suggesting the potential for human infection. The TEI deletion in the NA protein, mutations in the M1 protein, and resistance mutations in the M2 protein further increase the risk of human infection. Mutations in the PB1 and PB2 proteins increase the potential for these eight AIV strains to infect humans or mammals.
10.Association between Mediterranean diet scores and dental caries among children and adolescents with neurodevelopmental disorders
XIONG Wenjuan, SU Yuanyuan, LIU Zhao, HUANG Xiaoqing, QU Zhiyi, CUI Shanshan
Chinese Journal of School Health 2025;46(2):172-176
Objective:
To explore the association between mediterranean diet (MD) patterns and dental caries among children and adolescents with neurodevelopmental disorders (NDD), so as to provide a basis for developing scientific anti caries strategies related to diet.
Methods:
From December 2021 to June 2024, a questionnaire survey, a three day 24 hour dietary review survey, oral health examination, physical development measurement and Childhood Autism Rating Scale (CARS) evaluation were conducted involving 147 children and adolescents aged 2-22 years with NDD from nine special education schools and rehabilitation institutions in Tianjin. Group comparisons were carried out using the Mann-Whitney U test, Chi-square test, or Fisher s exact probability method. The correlation between dietary quality and dental caries was analyzed by adopting multiple linear regression analysis and restricted cubic spline.
Results:
There were 46 children and adolescents (31.3%) in the non dental caries group and 101 children and adolescents (68.7%) in the dental caries group. The number of decayed missing and filled teeth (dmft) was 2.0 (4.0), and the MD score was 4.0 (2.0) points. There were 62 children and adolescents (42.2%) in the low MD scores group and 85 children and adolescents (57.8%) in the high MD scores group. There was no significant difference in MD scores between NDD children in the non dental caries group and those in the dental caries group [nondental caries group:4.0(2.0), dental caries group:4.0(2.0), Z= -0.14, P >0.05]. The MD scores and dmft exhibited increasing and then decreasing trend ( P total =0.02, P non lineary = 0.04 ). Children and adolescents with NDD in the MD high scores group had a lower number of dmft than those in the MD low scores group ( β= -2.00 , 95%CI =-3.39 to -0.62, P <0.05). However, in children and adolescents with NDD and CARS scores ≥30, the above association was insignificant ( β=-0.63, 95%CI=-0.29-0.15, P >0.05).
Conclusion
Children and adolescents with NDD who have dietary patterns similar to the Mediterranean diet, are found to have fewer dental caries, and this is observed among those with no or mild symptoms of autism spectrum disorder.


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