ObjectiveTo investigate the neuroprotective mechanism of baicalein （BAI） on Parkinson's disease （PD） model rats by regulating endoplasmic reticulum stress pathway. MethodsSeventy-two Sprague-Dawley （SD） rats were randomly divided into normal group， model group， BAI low-dose group （80 mg·kg^-1）， medium-dose group （120 mg·kg^-1）， high-dose group （160 mg·kg^-1）， and levodopa-benserazide group （51 mg·kg^-1）， with 12 rats per group. Except for the normal group， PD rat models were established by subcutaneous injection of rotenone solution （2 mg·kg^-1） into the neck back of rats in the rest of groups for consecutive 28 days. Concurrently， rats in all groups received corresponding drugs via gavage for 28 days. After treatment， behavioral changes were assessed by using the open field and pole climbing tests. Neuronal pathology and apoptosis in the substantia nigra were observed via hematoxylin-eosin （HE） staining and TdT-mediated dUTP nick-end labeling （TUNEL） assay. α-Synuclein and tyrosine hydroxylase （TH） expressions were detected by immunohistochemistry （IHC）. Inflammatory factors such as interleukin-6 （IL-6）， interleukin-1β （IL-1β）， and tumor necrosis factor-α （TNF-α） were measured by enzyme-linked immunosorbent assay （ELISA）. RNA-like endoplasmic reticulum kinase （PERK）， activating transcription factor 4 （ATF4）， C/EBP-homologous protein （CHOP）， and Bcl-2-associated X protein （Bax） expressions were analyzed by Western blot. ResultsCompared with the normal group， the model group exhibited significantly reduced locomotion distance （P<0.01） and elevated pole-climbing scores （P<0.01）， with increased neuronal apoptosis rate （P<0.01）， significantly enhanced α-Synuclein expression （P<0.01）， decreased TH expression （P<0.01）， upregulated release of inflammatory factors （P<0.05，P<0.01）， and increased protein expressions of PERK/ATF4 pathway proteins and pro-apoptotic Bax （P<0.05，P<0.01）. Compared with the model group， medium/high-dose BAI groups and levodopa-benserazide group showed obviously improved motor function （P<0.05，P<0.01）， reduced pole-climbing scores （P<0.05）， decreased neuronal apoptosis （P<0.01）， downregulated α-Synuclein expression （P<0.01）， upregulated TH expression （P<0.05，P<0.01）， suppressed release of inflammatory factors （P<0.05，P<0.01）， and decreased protein expressions of PERK/ATF4 pathway proteins and pro-apoptotic Bax （P<0.05，P<0.01）. ConclusionBAI reduces the release of neuroinflammatory factors and neuronal apoptosis to improve the neurological function of PD model rats， and its mechanism may be related to alleviating endoplasmic reticulum stress and apoptosis by regulating the PERK/ATF4 pathway.

ObjectiveTo investigate the neuroprotective mechanism of baicalein （BAI） on Parkinson's disease （PD） model rats by regulating endoplasmic reticulum stress pathway. MethodsSeventy-two Sprague-Dawley （SD） rats were randomly divided into normal group， model group， BAI low-dose group （80 mg·kg^-1）， medium-dose group （120 mg·kg^-1）， high-dose group （160 mg·kg^-1）， and levodopa-benserazide group （51 mg·kg^-1）， with 12 rats per group. Except for the normal group， PD rat models were established by subcutaneous injection of rotenone solution （2 mg·kg^-1） into the neck back of rats in the rest of groups for consecutive 28 days. Concurrently， rats in all groups received corresponding drugs via gavage for 28 days. After treatment， behavioral changes were assessed by using the open field and pole climbing tests. Neuronal pathology and apoptosis in the substantia nigra were observed via hematoxylin-eosin （HE） staining and TdT-mediated dUTP nick-end labeling （TUNEL） assay. α-Synuclein and tyrosine hydroxylase （TH） expressions were detected by immunohistochemistry （IHC）. Inflammatory factors such as interleukin-6 （IL-6）， interleukin-1β （IL-1β）， and tumor necrosis factor-α （TNF-α） were measured by enzyme-linked immunosorbent assay （ELISA）. RNA-like endoplasmic reticulum kinase （PERK）， activating transcription factor 4 （ATF4）， C/EBP-homologous protein （CHOP）， and Bcl-2-associated X protein （Bax） expressions were analyzed by Western blot. ResultsCompared with the normal group， the model group exhibited significantly reduced locomotion distance （P<0.01） and elevated pole-climbing scores （P<0.01）， with increased neuronal apoptosis rate （P<0.01）， significantly enhanced α-Synuclein expression （P<0.01）， decreased TH expression （P<0.01）， upregulated release of inflammatory factors （P<0.05，P<0.01）， and increased protein expressions of PERK/ATF4 pathway proteins and pro-apoptotic Bax （P<0.05，P<0.01）. Compared with the model group， medium/high-dose BAI groups and levodopa-benserazide group showed obviously improved motor function （P<0.05，P<0.01）， reduced pole-climbing scores （P<0.05）， decreased neuronal apoptosis （P<0.01）， downregulated α-Synuclein expression （P<0.01）， upregulated TH expression （P<0.05，P<0.01）， suppressed release of inflammatory factors （P<0.05，P<0.01）， and decreased protein expressions of PERK/ATF4 pathway proteins and pro-apoptotic Bax （P<0.05，P<0.01）. ConclusionBAI reduces the release of neuroinflammatory factors and neuronal apoptosis to improve the neurological function of PD model rats， and its mechanism may be related to alleviating endoplasmic reticulum stress and apoptosis by regulating the PERK/ATF4 pathway.

Abstract Myopia is a major global public health concern, characterized by high prevalence among children and adolescents, frequent ocular complications, and multifactorial etiology. One potential contributing factor is serum vitamin D level. The paper summarizes epidemiological studies examining the relationship between serum vitamin D levels and myopia among children and adolescents. It further discusses possible biological mechanisms and future research prospects in order to elucidate the relationship between vitamin D levels and myopia in children and adolescents, and to provide a theoretical basis for effective prevention/control interventions.

ObjectiveTo explore the mechanism by which Yizhi Qingxin prescription improves mitochondrial dysfunction in Alzheimer's disease （AD） through regulating mitochondrial Ca²⁺ homeostasis and kinetic balance based on the protein kinase A （PKA）/calcineurin （CaN） signaling pathway. MethodsSixty three-month-old amyloid precursor protein （APP）/presenilin 1 （PS1） double transgenic mice were randomly divided into a model group， a donepezil group（0.65 mg·kg^-1）， a low-dose Yizhi Qingxin prescription group （YQF-L，2.6 g·kg^-1）， a medium-dose Yizhi Qingxin prescription group （YQF-M，5.2 g·kg^-1）， and a high-dose Yizhi Qingxin prescription group （YQF-H，10.4 g·kg^-1）， with 12 mice in each group. Twelve C57BL/6J mice with the same genetic background served as a normal group. Each treatment group received gavage administration daily， with the model and normal groups receiving equal volume of physiological saline. Intervention continued for 12 consecutive weeks. The learning and memory abilities of the mice were assessed using the novel object recognition （NOR） and Morris water maze （MWM） tests. Hematoxylin-eosin （HE）/Nissl staining was used to observe histopathological changes in the hippocampus. Transmission electron microscopy （TEM） was used to observe mitochondrial ultrastructure. Fluo-4 acetoxymethyl ester （Fluo-4 AM） Ca²⁺ probe was used to measure intracellular Ca²⁺ concentration in brain tissue. Western blot was used to determine the protein expression of PKA， CaN， sodium/calcium/lithium exchanger （NCLX）， mitochondrial calcium uniporter （MCU）， calmodulin （CaM）， dynamin-related protein 1 （Drp1）， and phosphorylated dynamin-related protein 1 （serine 637 site） ［p-Drp1（S637）］ in the hippocampus. Real-time quantitative polymerase chain reaction （Real-time PCR） was used to measure the expression of PKA， CaN， CaM， NCLX， MCU， and Drp1 mRNAs. ResultsCompared with those in the normal group， the recognition index （RI） of the model group decreased （P0.01）， and the number of crossings through the original platform area， the duration of stay in the target quadrant， and the distance were reduced （P0.01）. The protein expression of PKA， NCLX， and p-DRP1 （ser637） significantly decreased （P0.05）， and the mRNA expression of PKA and NCLX significantly decreased （P0.05）. The escape latency （EL） was prolonged （P0.05）， and the intracellular Ca²⁺ level significantly increased （P0.01）. The protein expression of CaN， CaM， MCU， and Drp1， as well as the mRNA expression of CaN， MCU， and Drp1， significantly increased （P0.05）. After intervention with Donepezil and Yizhi Qingxin prescription， compared with that in the model group， the RI of the treatment group significantly increased （P0.05）， and the number of crossings through the platform and the duration of stay in the target quadrant significantly increased （P0.05）. The protein expression of PKA， NCLX， and p-Drp1 （ser637） and the mRNA expression of PKA and NCLX significantly increased （P0.05）. On the 4th and 5th days， the EL was shortened （P0.05）， and the intracellular Ca²⁺ level decreased （P0.05）. The protein expression of CaN， CaM， MCU， and Drp1 and the mRNA expression of CaN， MCU， and Drp1 significantly decreased （P0.05）. ConclusionYizhi Qingxin prescription regulates the PKA/CaN pathway， upregulates the expression of PKA， NCLX， and p-Drp1 （ser637） proteins， reduces the expression of CaN， CaM， MCU， and Drp1 proteins， and regulates Ca²⁺ homeostasis and mitochondrial dynamic balance， thereby enhancing the spatial learning and memory abilities of AD mice.

ObjectiveTo explore the mechanism by which Yizhi Qingxin prescription improves mitochondrial dysfunction in Alzheimer's disease （AD） through regulating mitochondrial Ca²⁺ homeostasis and kinetic balance based on the protein kinase A （PKA）/calcineurin （CaN） signaling pathway. MethodsSixty three-month-old amyloid precursor protein （APP）/presenilin 1 （PS1） double transgenic mice were randomly divided into a model group， a donepezil group（0.65 mg·kg^-1）， a low-dose Yizhi Qingxin prescription group （YQF-L，2.6 g·kg^-1）， a medium-dose Yizhi Qingxin prescription group （YQF-M，5.2 g·kg^-1）， and a high-dose Yizhi Qingxin prescription group （YQF-H，10.4 g·kg^-1）， with 12 mice in each group. Twelve C57BL/6J mice with the same genetic background served as a normal group. Each treatment group received gavage administration daily， with the model and normal groups receiving equal volume of physiological saline. Intervention continued for 12 consecutive weeks. The learning and memory abilities of the mice were assessed using the novel object recognition （NOR） and Morris water maze （MWM） tests. Hematoxylin-eosin （HE）/Nissl staining was used to observe histopathological changes in the hippocampus. Transmission electron microscopy （TEM） was used to observe mitochondrial ultrastructure. Fluo-4 acetoxymethyl ester （Fluo-4 AM） Ca²⁺ probe was used to measure intracellular Ca²⁺ concentration in brain tissue. Western blot was used to determine the protein expression of PKA， CaN， sodium/calcium/lithium exchanger （NCLX）， mitochondrial calcium uniporter （MCU）， calmodulin （CaM）， dynamin-related protein 1 （Drp1）， and phosphorylated dynamin-related protein 1 （serine 637 site） ［p-Drp1（S637）］ in the hippocampus. Real-time quantitative polymerase chain reaction （Real-time PCR） was used to measure the expression of PKA， CaN， CaM， NCLX， MCU， and Drp1 mRNAs. ResultsCompared with those in the normal group， the recognition index （RI） of the model group decreased （P0.01）， and the number of crossings through the original platform area， the duration of stay in the target quadrant， and the distance were reduced （P0.01）. The protein expression of PKA， NCLX， and p-DRP1 （ser637） significantly decreased （P0.05）， and the mRNA expression of PKA and NCLX significantly decreased （P0.05）. The escape latency （EL） was prolonged （P0.05）， and the intracellular Ca²⁺ level significantly increased （P0.01）. The protein expression of CaN， CaM， MCU， and Drp1， as well as the mRNA expression of CaN， MCU， and Drp1， significantly increased （P0.05）. After intervention with Donepezil and Yizhi Qingxin prescription， compared with that in the model group， the RI of the treatment group significantly increased （P0.05）， and the number of crossings through the platform and the duration of stay in the target quadrant significantly increased （P0.05）. The protein expression of PKA， NCLX， and p-Drp1 （ser637） and the mRNA expression of PKA and NCLX significantly increased （P0.05）. On the 4th and 5th days， the EL was shortened （P0.05）， and the intracellular Ca²⁺ level decreased （P0.05）. The protein expression of CaN， CaM， MCU， and Drp1 and the mRNA expression of CaN， MCU， and Drp1 significantly decreased （P0.05）. ConclusionYizhi Qingxin prescription regulates the PKA/CaN pathway， upregulates the expression of PKA， NCLX， and p-Drp1 （ser637） proteins， reduces the expression of CaN， CaM， MCU， and Drp1 proteins， and regulates Ca²⁺ homeostasis and mitochondrial dynamic balance， thereby enhancing the spatial learning and memory abilities of AD mice.

ObjectiveTo analyze the epidemiological status, serotypes, and drug resistance characteristics of Vibrio parahaemolyticus in foodborne disease surveillance in Wenzhou from 2016 to 2024, and to provide scientific evidence and data support for the prevention and control of Vibrio parahaemolyticus infections. MethodsA total of 45 980 stool or anal swab samples were collected from patients with vomiting and diarrhea as the main symptoms and a history of consuming suspicious food at medical institutions at all levels in Wenzhou from 2016 to 2024. Isolation, identification, and drug susceptibility testing were performed. Case information was collected through the National Foodborne Disease Surveillance Reporting System. The Cochran-Mantel-Haenszel (CMH) chi-square test was used to analyze the detection rates among groups. ResultsAmong the 45 980 suspected samples, 2 821 were positive for Vibrio parahaemolyticus, with an overall detection rate of 6.14%. A comparison of detection rates across different population groups revealed that the highest rates were found among adults aged 20‒39 (8.57%,1 603/18 697) and among farmers and workers (7.93%, 994/12 537). A comparison of detection rates across different seasons revealed that the detection rates were higher from June to October (5.12%, 9.04%, 15.04%, 14.68%, and 7.80%, respectively), peaking in August. Analyses of the sampling results for suspect foodstuffs revealed that aquatic products and their derivatives accounted for the highest proportion (42.86%). Regarding the setting of food consumption, the household accounted for 44.53% (1 257/2 821). From 2016 to 2020, the predominant serotype was O3:K6 (28.82%, 813/2 821), followed by O10:K4 (28.25%, 797/2 821) and O4:KUT (23.61%, 666/2 821). In terms of drug resistance, the resistance rate to cefazolin was the highest at 84.15% (393/467), and the multi-drug resistance rate was 6.21% (29/467). ConclusionFrom 2016 to 2024, patients with suspected foodborne illnesses in Wenzhou City experienced a peak in Vibrio parahaemolyticus infections during the summer and autumn months (June to October). Young adults aged 20‒39, as well as farmers and manual workers, were the key target groups for the prevention and control of Vibrio parahaemolyticus infections. The predominant serotype of Vibrio parahaemolyticus shifted from O3:K6 to O10:K4. Vibrio parahaemolyticus exhibited a high level of resistance to cefazolin. It is essential to strengthen surveillance of the epidemiological trends of the predominant serotype, monitor changes in the antibiotic resistance of Vibrio parahaemolyticus, enhance health education for key populations, and intensify regulatory inspections of high-risk foods such as aquatic products and their derivatives.

Objective To explore the mechanism of modified maimendong decoction (MMD) in inhibiting lung cancer metastasis from the perspective of immune regulation. Methods CTC-TJH-01 and LLC cells were intervened with different concentrations of modified maimendong decoction. The cell proliferation was detected with a CCK-8 kit, apoptosis was detected with an Annexin V-FITC/PI kit, and cell migration was detected through Transwell assays. A lung metastasis model was established through the tail vein injection of LLC cells into C57BL/6 mice, and body weight change and lung tumor metastasis in the mice were evaluated after continuous gavage intervention with MMD. HE staining, immunohistochemistry, and immunofluorescence were employed to observe the histomorphology, Ki-67 protein level, and NK and T cell levels of metastatic lesions. The levels of NK and T cells in the peripheral blood of mice were detected throughflow cytometry. Results MMD had no significant inhibitory effect on the proliferation, apoptosis, and migration of CTC-TJH-01 and LLC cells in vitro. In mice, MMD could significantly inhibit the lung metastasis of LLC cells, increase the proportion of NK and CD8⁺ T cells in peripheral blood and tumor microenvironment (P<0.05), and reduce the expression of Ki-67 protein in metastatic tumor tissues (P<0.05). Conclusion MMD may inhibit the growth of metastatic tumors by upregulating the expression levels of NK and CD8⁺ T cells in peripheral blood to promote the elimination of circulating tumor cells, and regulating the infiltration of NK and CD8⁺ T cells in the immune microenvironment of metastatic tumors, then play an antimetastatic role in lung cancer.

BACKGROUND:Obesity negatively affects dynamic balance during walking,and crossing barriers is a more routine functional activity that requires more stability in controlling body posture. OBJECTIVE:To investigate the differences in dynamic stability between obese and average males,and to assess the balance ability of obese males using a relatively more challenging obstacle crossing. METHODS:A total of 24 male youths(12 each in the obese and normal groups)were recruited to complete the tests of walking on level ground and crossing obstacles of different heights(4 cm,11 cm,15 cm)in random order.Kinematic and dynamic data were collected using the Qualisys motion capture system and Kistler force stage.Statistical analysis was performed using two-factor(2 groups * 4 movement types)repeated measures analysis of variance. RESULTS AND CONCLUSION:The obese group had a lower step speed than the normal group(P<0.05),the proportion of the first single support period decreased and the proportion of the second double support period increased when crossing the 11 cm versus 15 cm hurdles(P<0.05).When walking on level ground,the margin of stability in the internal and external directions in the normal group was greater than that of the obese group(P<0.05).When crossing the 4 cm hurdles,the margin of stability in the obese group was less than that in the normal group(P<0.05).When crossing the 11 cm hurdles,there was no significant difference between the two groups in the anterior-posterior direction(P>0.05),while there was a significant difference in the internal-external direction(P<0.05).When crossing the 15 cm hurdles,the margin of stability in the obese group was lower than that in the normal group(P<0.05).Overall,obesity decreases the body's ability to control the body,reduces dynamic stability during crossing the barrier,and increases the risk of falls compared with the general population.In addition,compared with level ground walking,the decrease in the dynamic stability when crossing barriers is more significant in the obese group than the general population.

Objective: To examine the association of joint effect of overweight and obesity with dyslipidemia on left ventricular hypertrophy (LVH) in children, so as to provide scientific evidence for the prevention of early cardiovascular damage in children. Methods: Data were obtained from the second followup crosssectional survey of Huantai Childhood Cardiovascular Health Cohort study in 2021, comprising 1 047 children aged 10-15 years with complete information. Based on overweight and obesity status and dyslipidemia status, all participants were divided into four groups:normal weight with normal lipid levels, normal weight with dyslipidemia, overweight and obesity with normal lipid levels, and overweight and obesity with dyslipidemia. Left ventricular mass index (LVMI) levels and prevalence of LVH across four groups were compared. Multivariate Logistic regression model was used to examine the association of joint effect of overweight and obesity with dyslipidemia on LVH in children. Results: There were significant differences in LVMI levels [(28.66±7.10, 29.63±4.71,31.49±5.86,32.65±4.80)g/m2.7] and prevalence of LVH (4.28%, 12.50%, 22.74%, 31.30%) across four groups (F/χ2=50.76, 90.92, P<0.05). After adjustment for confounding variables such as gender,age,screen time,sleep duration,fruit and vegetable intake,carbonated beverage consumption,physical activity and elevated blood pressure, compared to children with both normal weight and normal lipid levels, the risk of LVH in children with dyslipidemia alone increased (OR=3.27, 95%CI=1.57-6.82，P<0.05). Children with overweight and obesity alone also had a significantly increased risk of LVH (OR=6.33, 95%CI=3.76-10.66), and the highest risk was observed in those with both overweight and obesity with dyslipidemia (OR=9.66, 95%CI=5.35-17.43) (P<0.05). Conclusions The joint effect of overweight and obesity with dyslipidemia is positively correlated with LVH in children. To prevent LVH in children, both overweight and obesity with dyslipidemia should be paid attention to.

Objective To present an assessment method based on oscillometric upper-arm cuff pressure wave for realizing home-based detection of arteriosclerosis.Methods An upper-arm cuff pressure wave acquisition device based on an electronic blood pressure monitor was designed to implement data collection for cuff inflation and deflation,as well as the 15 s pressure holding phase.Following preprocessing of the data collected during this holding phase,individual pulse waves were extracted for pulse decomposition analysis(PDA).A novel model that superimposed a logarithmic normal function with two Gaussian functions,and an optimization method that combined template matching and particle swarm optimization were proposed to efficiently and accurately extract PDA features.Gaussian process regression was employed for multifeature fusion analysis,leading to the proposal of a new predictive indicator for arteriosclerosis.Results The mean absolute error of PDA was less than 1.2%,and the average processing time for a single pulse wave was less than 0.2 s.The regression determination coefficient R2 between the obtained indicators and baPWV was 0.8178.Conclusion The analysis on upper-arm cuff pressure wave provides a new reference for non-invasive arteriosclerosis detection,and it can be applied to electronic blood pressure monitors for home-based monitoring,offering significant practical value.