Objective To understand the surveillance situation of poliovirus in Guangzhou from 2011 to 2024, and to further strengthen polio surveillance and ensure the continued maintenance of a polio-free status. Methods An analysis was conducted on the discovery and investigation results of six cases of vaccine-derived poliovirus (VDPV) detected in Guangzhou. Results A total of 6 VDPV incidents were reported in Guangzhou from 2011 to June 2024, among which 5 incidents were from sewage sample testing in the Liede Sewage Treatment Plant in Guangzhou, all of which were confirmed as VDPV, with 1 for type I, 1 for type II, and 3 for type III. In addition, one confirmed HFMD case was identified as a type VDPV II carrier. No presence of any wild poliovirus (WPV), VDPV cases, or circulating VDPV (cVDPV) was reported. Conclusion Guangzhou City has maintained a high level of vigilance and effectiveness in the monitoring and prevention of polio. Continuously strengthening the construction of the polio monitoring network, optimizing vaccination strategies, and comprehensively improving public health awareness are still the focus of the prevention and control work in the future.

Objective:To study the effects of endoplasmic reticulum stress (ERS) and autophagy mechanisms in the pathogenesis of necrotizing enterocolitis (NEC).Methods:A total of 39 newborn SD rats were randomly assigned into 3 groups: the NEC group (NEC model: artificial feeding+hypoxic stimulation+intragastric injection of lipopolysaccharides), the ERS antagonist group (NEC model+intraperitoneal injection of 4-phenylbutyric acid) and the ERS inducer group (NEC model+intraperitoneal injection of tunicamycin). After successful modeling, the rats were sacrificed and intestinal tissues were obtained. The intestinal pathology was observed using electronic microscope. Intestinal fatty acid binding protein (I-FABP) was detected using ELISA. Real-time quantitative polymerase chain reaction (RT-qPCR) was used to examine mRNA levels of glucose-regulated protein 78 (GRP78) and oxygen-regulated protein 150 (ORP150). Western-blot was used to detect p62 and autophagy-related proteins (microtubule-associated protein 1 light chain 3 (LC3)Ⅱ and LC3Ⅰ) and LC3Ⅱ/LC3Ⅰ ratio was calculated.Results:(1) For all 3 groups, the pathological scores of rat intestines were≥2. (2) The ERS inducer group showed significantly higher clinical score, pathological score, I-FABP level, GRP78 and ORP150 mRNA levels and LC3Ⅱ/ LC3Ⅰ ratio than the NEC group and ERS antagonist group, and the NEC group higher than the ERS antagonist group ( P<0.05). The p62 level in the ERS inducer group was significantly lower than the NEC group and the ERS antagonist group, and the NEC group lower than the ERS antagonist group ( P<0.05). (3) The LC3Ⅱ/ LC3Ⅰ ratio was positively correlated with clinical score, pathological score and I-FABP level ( P<0.05). The p62 level was negatively correlated with clinical score, pathological score and I-FABP level ( P<0.05). The mRNA levels of GRP78 and ORP150 were positively correlated with clinical score, pathological score and I-FABP level ( P<0.05). LC3Ⅱ/ LC3Ⅰ ratio was positively correlated with the mRNA levels of GRP78 and ORP150 ( P<0.05). The p62 level was negatively correlated with the mRNA levels of GRP78 and ORP150 ( P<0.05). Conclusions:ERS is associated with the pathogenesis of NEC. Inhibition of ERS can reduce autophagy and improve intestinal barrier function and clinical symptoms of NEC.

It has been proposed by Basic Questions On Proper Therapies for Different Diseases Geographically （《素问·异法方宜论篇》） that "wei （痿） diseases should be treated by Daoyin （导引）". Furthermore， it is clarified that the indications of Daoyin are those conditions related to spleen and dampness caused by dampness pathogen， excessive food intake and less exercise， and mainly manifested as heavy limbs， fatigue and flaccidity， which is similar to the metabolic imbalance in the early stage of glucose or lipid metabolism disorder in modern medicine. Based on modern clinical and basic research evidence， Daoyin can inhibit the response of inflammation， alleviate oxidative stress， regulate intestinal microbiota， and modulate gene expression to improve metabolic abnormalities， and this will provide ideas for researches on the indications of Daoyin.

Objective To investigate the effect of mesenchymal stem cells(MSCs)combined with immunosuppressants(IS)on immune rejection in a rat model of liver transplantation.Methods F344 rats were divided into Normal group(without any intervention),PS group(injected with an equal volume of normal saline),MSC group(injected with MSC),IS group(injected with IS),and MSC+IS group(injected with MSC and IS),with 8 rats in each group.For all rats except those in the Normal group,the Kamada's double-cuff method was used to establish a model of orthotopic liver transplantation,without reconstruction of the hepatic artery.HE staining and Masson staining were performed for rat liver tissue,and the degree of liver fibrosis was analyzed;immunohistochemical experiments were used to measure the infiltration of T cells and NK cells,and immunofluorescence assay was used to analyze macrophage M2 polarization.A one-way analysis of variance was used for comparison of continuous data between multiple groups,and the least significant difference t-test was used for further comparison between two groups.The Kaplan-Meier method was used to plot survival curves,and the log-rank test was used for survival analysis.Results Compared with the PS group,the MSC+IS group had a significantly prolonged survival time(P＜0.01),and the MSC group,the IS group,and the MSC+IS group had a significant improvement in the histological structure of the liver and a significant reduction in the degree of liver fibrosis(all P＜0.000 1),as well as a significant reduction in the infiltration of NK and T cells(all P＜0.000 1)and a significant increase in the degree of macrophage M2 polarization(all P＜0.000 1).The MSC+IS group had a significantly better effect than the MSC group and the IS group.Conclusion MSCs combined with IS can improve liver histopathology,reduce inflammatory cell infiltration,promote macrophage M2 polarization,and exert an immunosuppressive effect in rats after liver transplantation.

Objective To evaluate the application value of the three-point localization method in improving the quality and efficiency of four-chamber view acquisition in cardiac magnetic resonance(CMR)imaging.Methods A total of 215 patients who underwent four-chamber view in CMR imaging from January 2022 to October 2023 were retrospectively enrolled and divided into two groups.The control group(n=109)received traditional localization method while the study group(n=106)received three-point localization method.The image quality of mitral valve,tricuspid valve and cruciform structure in four-chamber view images were assessed by two radiologists using a Likert 4-piont scale.The time-consumption from scout imaging to the finish of four-chamber view imaging was recorded.Constituent data and numeral data were compared by Chi-square test and two-sample t test,respectively.Kappa test was used to analyze the inter-observer consistency.Results There were no significant inter-group differences in gender,age,disease profile,or the radiographers'experience.The mean quality scores of the mitral valve,tricuspid valve and cruciform structure in the control group and the study group were 3.44±0.64 and 3.63±0.49(P=0.023),3.43±0.67 and 3.53±0.60(P=0.202),3.71±0.49 and 3.83±0.35(P=0.047),respectively.The image quality score was higher in the study group than in the control group,with the differences in mitral valve and cruciform structure reaching statistical significance.The time-consumption for obtaining four-chamber view for the control group and the study group was 11.67±3.49 minutes and 7.212±1.83 minutes,respectively,with statistically significant differences(P＜0.001).Conclusion Compared with the traditional localization method,the three-point localization method provides better image quality in four-chamber view imaging with shortened imaging time.

Objective: To explore the damaging effect of the IP3-protein kinase C pathway on human retinal vascular endothelial cells under high glucose conditions. Methods: Human retinal vascular endothelial cells in the logarithmic growth phase were taken and divided into the experimental group(10 mmol/L glucose and 20 mmol/L glucose) and the control group(5 mmol/L glucose). The morphological changes of cells were observed under different concentrations of glucose culture medium. The apoptosis of human retinal vascular endothelial cells was detected by flow cytometry. Real-time fluorescent quantitative reverse transcription polymerase chain reaction was used to detect the RNA expression level of PKC in the IP3-protein kinase C(PKC) pathway, and Western blot was used to detect the protein expression level of PKC in cells. Results: Under high glucose conditions, the volume of human retinal vascular endothelial cells increased, the degree of extension decreased, and the apoptosis rate increased. Compared with the control group, the apoptosis rate of human retinal vascular endothelial cells in the 20 mmol/L glucose group increased(P<0.05); the IP3 level of human retinal vascular endothelial cells in the 20 mmol/L glucose group(587.9±15.2) ng/ml was lower than that of the control group(738.9±1.0) ng/ml(P<0.05). Under high glucose treatment, the expression levels of PKC mRNA and protein increased(P<0.05). Conclusion The IP3-PKC pathway may be involved in the damage process of human retinal vascular endothelial cells under high glucose conditions, and thus may play a role in diabetic retinopathy.

Objective: To elucidate the biological basis of the heart qi deficiency (HQD) pattern, an in-depth understanding of which is essential for improving clinical herbal therapy. Methods: We predicted and characterized HQD pattern genes using the new strategy, TCM-HIN2Vec, which involves heterogeneous network embedding and transcriptomic experiments. First, a heterogeneous network of traditional Chinese medicine (TCM) patterns was constructed using public databases. Next, we predicted HQD pattern genes using a heterogeneous network-embedding algorithm. We then analyzed the functional characteristics of HQD pattern genes using gene enrichment analysis and examined gene expression levels using RNA-seq. Finally, we identified TCM herbs that demonstrated enriched interactions with HQD pattern genes via herbal enrichment analysis. Results: Our TCM-HIN2Vec strategy revealed that candidate genes associated with HQD pattern were significantly enriched in energy metabolism, signal transduction pathways, and immune processes. Moreover, we found that these candidate genes were significantly differentially expressed in the transcriptional profile of mice model with heart failure with a qi deficiency pattern. Furthermore, herbal enrichment analysis identified TCM herbs that demonstrated enriched interactions with the top 10 candidate genes and could potentially serve as drug candidates for treating HQD. Conclusion Our results suggested that TCM-HIN2Vec is capable of not only accurately identifying HQD pattern genes, but also deciphering the basis of HQD pattern. Furthermore our finding indicated that TCM-HIN2Vec may be further expanded to develop other patterns, leading to a new approach aimed at elucidating general TCM patterns and developing precision medicine.

Objective:To summarize the imaging presentations of the fallopian canal cerebrospinal fluid leaking (FCCFL).Methods:The high resolution CT (HRCT)and MRI materials of 4 patients (4 ears) with FCCFL confirmed by surgery between August 2016 to November 2023 were retrospectively analyzed. Among these, there were 2 males and 2 females, their ages ranged from 6 to 69 years.Results:All of the FCCFL were unilateral, including 2 on the left and 2 on the right.Clinically, the patients with FCCFL suffered from clear nasal fluid flow, ear tightness, and hearing loss. On CT, all of the affected ears were depicted markedly dilatation of the proximal portion of fallopian canal(FC), the labyrinthine segment and geniculate fossa were involved in 4 cases, and involvement of tympanic segment in 1 case at the same time. The geniculate fossa in the affected side were significantly enlarged, protruding upwards into the tympanic cavity, with one case simultaneously involving the cochlea. On MRI, the hyposignal on T 1WI and hypersignal on T 2WI or water sequence like cerebrospinal fluid (CSF) were shown in the enlargement FC, without diffusion restriction, and non-enhancing with administration Gadolinium contrast.CSF-like signal effusion was shown in all of the affected tympanum, of which, the CSF-like signal effusion was demonstrated in the area along the superficial petrosal nerve, the right pterygopalatine fossa and the parapharyngeal space. The adjacent intracranial meninges were presented thickening in 3 cases. Conclusion:The imaging appearances of FCCFL present some characteristics:on HRCT, the proximal portions of the affected FC depicts markedly enlargement,especially the geniculate fossa.While they present CSF-like signal, no diffusion restriction, and no enhancement administration, Gadolinium contrast on MRI, accompanying the CSF-like signal effusion in the affected tympanum.

Objective:To summarize the HRCT and MRI appearances of stapical footplate fistula related to inner ear malformation (SFF-Re-IEM).Methods:The HRCT and MRI materials of 48 cases (53 ears) SFF-Re-IEM were retrospectively analyzed. Among them, 25 SFF-Re-IEM ears were confirmed by surgery. Their CT and MRI findings including associated IEM type, internal auditory canal (IAC) malformation, tympanic fluid, its density and signal features, and accompanied labyrinthitis were recorded.Results:Among 48 cases (53 ears) with SFF-Re-IEM, 17 ears with incomplete partition type Ⅰ, accounting for 32.1%, 13 ears with common cavity for 24.5%, 13 ears with cochlear aplasia for 24.5%, 7 ears with cochlear dysplasia Ⅱ for 13.2%, and 3 ears with Mondini for 5.7%,were found respectively. 94.3% of them were associated with a defect or dysplasia in the found of the IAC. They were divided into 4 types according to the intact of the stapical footplate and accompanied CSF otorrhea: 22 ears were diagnosed as the stapical footplate leaking, of them, 2 ears might come from the stapical footplate bony defect, 6 ears were from the stapical footplate hernia. 1 ear belonged to the peristapical footplate leaking. 30 ears with the isolated the stapical footplate hernia were another found. The bony defect in 2 ears with the stapical footplate bony defect were not presented on CT and MRI.The focal bony defect of the affected stapical footplate of 36 ears with the stapical footplate hernia were demonstrated, which presented the hemispherical protruding into the tympana, the soft-tissue density on CT, and CSF-like signal on the MR heaved-T2WI images. Among 22 ears with the stapical footplate leaking, their imaging appearances varied from the different amount of the leaking CSF. Besides the focal bony defects of the affected stapical footplates, there were much more CSF-like density or signal in the ipsilateral tympanic cavity in 17 affected ears connecting with the vestibule through the defect area. In the CSF leaking ears with less CSF leaking in 5 ears, the CSF-like cysts like SFH were shown on the stapical footplate defect area, but their outer edges were irregular, and the CSF-like signal scattering in the tympanic cavity did not connect with the protruding cysts at the stapical area.Conclusion:The variable appearances of the SFF-Re-IEM ears based on the different subtypes are its characteristic HRCT and MRI appearances. This is helpful for the SFF-Re-IEM diagnosing to grasp its imaging features.

Objective:To develop a prediction tool for 6-year incident risk of frailty among Chinese older adults aged 65 years or above.Methods:Data from the Chinese Longitudinal Healthy Longevity Survey from 2002 to 2018 was used, including 13 676 older adults aged 65 years or above who were free of frailty at baseline. Key predictors of frailty were identified via the least absolute shrinkage and selection operator (LASSO) method, and were thereafter used to predict the incident frailty based on the Cox proportional hazards regression model. The model was internally validated by 2 000 Bootstrap resamples and evaluated for the performance of discrimination and calibration using the area under the receiver operating characteristic curve (AUC) and calibration curve, respectively. The net benefit of the developed prediction tool was evaluated by decision-curve analysis.Results:The M( Q1, Q3) age and follow-up time of the participants were 81.0 (71.0, 90.0) years and 6.0 (4.1, 9.2) years, respectively. A total of 4 126 older persons (30.2%) were recorded with frailty incidents during the follow-up, with the corresponding incidence density of 41.8/1 000 person-years. A total of 15 key predictors of frailty were selected by LASSO, namely, age, sex, race, education years, meat consumption, tea drinking, performing housework, raising domestic animals, playing cards or mahjong, and baseline status of visual function, activities of the daily living score, instrumental activities of the daily living score, hypertension, heart disease, and self-rated health. The prediction model was internally validated with an AUC of 0.802, with the max Youden's index of 0.467 at a risk threshold of 19.0%. The calibration curve showed high consistency between predicted probabilities and observed proportions of frailty events. The decision curve indicated that higher net benefits could be obtained via the prediction model than did strategies based on intervention in all or none participants for any risk threshold less than 59%, and the model-based net benefit was estimated to be 0.10 at a risk threshold of 19.0%. Conclusions:The herein developed 6-year incident risk prediction model of frailty, based on easily accessible questionnaires and physical examination variables, has good predictive performance. It has application potential in identifying populations at high risk of incident frailty.