Objective To investigate the role of G protein signal regulator 2(RGS2)in regulating the formation of angiotensin Ⅱ(Ang Ⅱ)-induced aortic dissection.Methods C57BL/6 mice were divided into 3 groups:control group(n=10),Ang Ⅱ group(n=20),Ang Ⅱ+sh-RGS2 group(n=20).The Ang Ⅱ group and Ang Ⅱ+sh-RGS2 group established an aortic dissection model.The incidence of aortic dissection was evaluated in vivo,and the phenotypic transformation of VSMC was evaluated in vitro and in vivo.Results Knockdown of RGS2 largely coun-teracted Ang Ⅱ-induced inhibition of αSMA,ACTA2 and MYH11,and suppressed Ang Ⅱ-induced SPP1 and Vim-entin in VSMC.The incidence of aortic dissection in Ang Ⅱ group and Ang Ⅱ+sh-RGS2 group were 45％(9/20)and 10％(2/20),respectively.Fewer elastic lamina thickening,aortic rupture,and aortic wall collagen fiber con-tent were observed in Ang Ⅱ+sh-RGS2 group compared to Ang Ⅱ group.In addition,compared with the Ang Ⅱgroup,the maximum diameter of the aorta in the Ang Ⅱ+sh-RGS2 group was significantly reduced(P＜0.05).In addition,the ACTA2 and MYH11 proteins in the aorta of the Ang Ⅱ+sh-RGS2 group were significantly higher than those in the Ang Ⅱ group(P＜0.01),while the RGS2,SPP1,and Vimentin proteins significantly decreased(P＜0.01).Conclusion Knockdown of RGS2 inhibits the transformation of Ang Ⅱ-induced VSMC from a contractile phenotype to a synthetic phenotype,thereby reducing the incidence of aortic dissection formation.

Objective To analyze the evidence of risk factors and health and rehabilitation intervention strategies for lower back inju-ries in adult golfers. Methods A thematic search method was employed,retrieving literature related to low back pain in adult golfers from PubMed,Web of Science,EBSCO,Scopus,the Cochrane Library,CNKI,VIP and Wanfang Data,with publica-tion dates ranging from inception to April 1st,2024.Authors,country,publication time,study subjects,risk fac-tors for low back pain and intervention strategies were extracted from the literature for systematic review. Results Nine English articles from the United States,Australia,South Korea,Portugal and South Africa were included,involving 237 golfers,three survey studies,one prospective cohort study,five randomized controlled trial(RCT)and quasi-RCT articles were enrolled.The study subjects included adult professional and amateur golfers.The primary risk factors were excessive repetition of non-standard golf swinging movements resulting in excessive lumbar torsion and overuse of the lumbar musculature;abnormal activation patterns of the rectus abdominis,erec-tor spinae and latissimus dorsi muscles;and functional limitation of the trunk and hip joints,causing excessive lumbar compensation during the swinging motion.Health and rehabilitation intervention strategies included the comprehensive application of electromyography and ultrasound biofeedback technologies with a focus on screen-ing the lumbar weak muscle groups and swinging actions,optimizing training load,and standardizing swinging technical movements;strengthening functional training of the trunk and hip joints;and enhancing strength train-ing of the abdominal and core muscle groups,as well as the deep muscle groups. Conclusion The risk factors for low back pain in adult golfers are primarily associated with excessive repetition of im-proper golf swing techniques,insufficient strength in the abdominal and core muscle groups,and functional limi-tations of the trunk and hip joints.Key intervention strategies include optimizing training load using electromyog-raphy and ultrasound biofeedback techniques,standardizing swing techniques,enhancing trunk and hip joint functional training,and strengthening waist,abdominal,core and deep muscle group strength training.The imple-mentation of these strategies helps to reduce the risk of low back pain in golfers,enhance athletic performance,and promote physical and mental health.

Objective To investigate changes of muscle activation in the lower limbs during landing impact as running fatigue pro-gresses. Methods From November to December,2022,eleven male runners were recruited from Wuhan Sports University.They performed a steady-state run at 75%of their maximum heart rate and continued until Borg rating score≥17 or 90%of their maximum heart rate.Muscle activity data were collected using a Delsys wireless surface electromy-ography system,continuously recording the EMG of the quadriceps(vastus medialis,rectus femoris,vastus later-alis),hamstrings(biceps femoris,semitendinosus),gluteus maximus,lateral head of the gastrocnemius and tibia-lis anterior.The pre-activation,post-activation and co-activation characteristics of these lower limb muscles were analyzed. Results With fatigue accumulation during running,significant differences were observed in the pre-activation level of the tibialis anterior among different fatigue points(F=2.955,P=0.048),with the 100%fatigue point showing significantly higher pre-activation levels than the start(P=0.010);as well as post-activation levels of quadriceps(F=6.609,P=0.001),with higher levels at the 100%point compared to the start(P=0.011),33%(P=0.009)and 67%(P=0.043)fatigue points;co-activation ratios of ankle joint during the pre-activation phase(F=3.287,P=0.034),with a significantly higher co-activation ratio at the 100%fatigue point compared to the start(P=0.023). Conclusion As running fatigue accumulates,the central nervous system adjusts the activation levels of various lower limb muscles to modify impact posture,reducing the risk of injury from accumulated lower limb loads.

Objective To collect data on imported malaria cases in Jiangsu Province from 2019 to 2023 after malaria elimination and to analyze the current epidemic situation and prevention and control measures of imported malaria, discussing future prevention and control strategies. Methods Malaria case information for Jiangsu Province from 2019 to 2023 was extracted and downloaded from the China Information System for Disease Control and Prevention (CISDCP) as well as the Jiangsu Provincial malaria epidemic database. Statistical analysis was conducted using Stata 12.0 and SPSS 16.0 software. Results From 2019 to 2023, a total of 534 cases of malaria were directly reported online in Jiangsu Province, with annual cases numbering 244, 90, 32, 36, and 132 respectively, all being laboratory-confirmed imported malaria cases from abroad. During the COVID-19 pandemic from 2020 to 2022, the number of imported malaria cases significantly decreased, with several months reporting zero cases. Among the 534 malaria cases, the vast majority were individuals who had traveled to countries in sub-Saharan Africa and Southeast Asia for work, business, international studies, or tourism. Over the five years, the median, minimum, and maximum days for patients from onset of illness to health-seeking were 1(0,12), 1(0,8), 0(0,6), 0(0,10), and 1(0,18) days, with a statistically significant difference in health-seeking time among patients (Fisher's exact test, P=0.03). Over the past three years of the COVID-19 pandemic, compared to outside centralized isolation stations, malaria cases within centralized isolation stations were diagnosed in a shorter time (Fisher exact test, P=0.007). A total of 24 severe malaria cases were reported, with no deaths, including 23 cases of P. falciparum and 1 case of P. ovale. Conclusions After the elimination of malaria, imported malaria cases in Jiangsu Province have sharply decreased due to the impact of the COVID-19 pandemic. Malaria cases in centralized isolation stations (CIS) for COVID-19 control of Jiangsu Province are more likely to be promptly diagnosed, and the timeliness from onset to health-seeking among malaria patients returning from high-malaria areas improved. As COVID-19 prevention and control policies adjusted, there has been a sharp increase in imported malaria cases in 2023. It's still necessary to strengthen measures for malaria prevention and control and maintain the capacity to prevent malaria re-transmission in Jiangsu Province.

BACKGROUND: The effect of arteriosclerotic intracranial arterial vessel wall enhancement (IAVWE) on downstream collateral flow found in vessel wall imaging (VWI) is not clear. Regardless of the mechanism underlying IAVWE on VWI, damage to the patient's nervous system caused by IAVWE is likely achieved by affecting downstream cerebral blood flow. The present study aimed to investigate the effect of arteriosclerotic IAVWE on downstream collateral flow. METHODS: The present study recruited 63 consecutive patients at the Second Hospital of Hebei Medical University from January 2021 to November 2021 with underlying atherosclerotic diseases and unilateral middle cerebral artery (MCA) M1-segment stenosis who underwent an magnetic resonance scan within 3 days of symptom onset. The patients were divided into 4 groups according to IAVWE and the stenosis ratio (Group 1, n = 17; Group 2, n = 19; Group 3, n = 13; Group 4, n = 14), and downstream collateral flow was analyzed using three-dimensional pseudocontinuous arterial spin labeling (3D-pCASL) and RAPID software. The National Institutes of Health Stroke Scale (NIHSS) scores of the patients were also recorded. Two-factor multivariate analysis of variance using Pillai's trace was used as the main statistical method. RESULTS: No statistically significant difference was found in baseline demographic characteristics among the groups. IAVWE, but not the stenosis ratio, had a statistically significant significance on the late-arriving retrograde flow proportion (LARFP), hypoperfusion intensity ratio (HIR), and NIHSS scores ( F = 20.941, P <0.001, Pillai's trace statistic = 0.567). The between-subject effects test showed that IAVWE had a significant effect on the three dependent variables: LARFP ( R2 = 0.088, F = 10.899, P = 0.002), HIR ( R2 = 0.234, F = 29.354, P <0.001), and NIHSS ( R2 = 114.339, F = 33.338, P <0.001). CONCLUSIONS: Arteriosclerotic IAVWE significantly reduced downstream collateral flow and affected relevant neurological deficits. It was an independent factor affecting downstream collateral flow and NIHSS scores, which should be a focus of future studies. TRIAL REGISTRATION ChiCTR.org.cn, ChiCTR2100053661.
Humans ; Constriction, Pathologic/pathology* ; Magnetic Resonance Imaging/methods* ; Middle Cerebral Artery/pathology* ; Tomography, X-Ray Computed

Background: To evaluate the feasibility of treating odontoid fractures in the Chinese population with two cortical screws based on computed tomography (CT) scans and describe a new measurement strategy to guide screw insertion in treating these fractures. Methods: A retrospective review of cervical computed tomographic scans of 128 patients (aged 18–76 years; men, 55 [43.0%]) was performed. The minimum external transverse diameter (METD), minimum external anteroposterior diameter (MEAD), maximum screw length (MSL), and screw projection back angle (SPBA) of the odontoid process were measured on coronal and sagittal CT images. Results: The mean values of METD and MEAD were 10.0 ± 1.1 mm and 12.0 ± 1.0 mm, respectively, in men and 9.2 ± 1.0 mm and 11.0 ± 1.0 mm, respectively, in women. Both measurements were significantly higher in men (p < 0.001). In total, 87 individuals (68%) had METD > 9.0 mm that could accommodate two 3.5-mm cortical screws. The mean MSL value and SPBA range were 34.4 ± 2.9 mm and 13.5°–24.2°, respectively, with no statistically significant difference between men and women. Conclusions The insertion of two 3.5-mm cortical screws was possible for anterior fixation of odontoid fractures in 87 patients (68%) in our study, and there was a statistically significant difference between men and women.

Aristolochic acids (AAs) have long been considered as a potent carcinogen due to its nephrotoxicity. Aristolochic acid I (AAI) reacts with DNA to form covalent aristolactam (AL)-DNA adducts, leading to subsequent A to T transversion mutation, commonly referred as AA mutational signature. Previous research inferred that AAs were widely implicated in liver cancer throughout Asia. In this study, we explored whether AAs exposure was the main cause of liver cancer in the context of HBV infection in mainland China. Totally 1256 liver cancer samples were randomly retrieved from 3 medical centers and a refined bioanalytical method was used to detect AAI-DNA adducts. 5.10% of these samples could be identified as AAI positive exposure. Whole genome sequencing suggested 8.41% of 107 liver cancer patients exhibited the dominant AA mutational signature, indicating a relatively low overall AAI exposure rate. In animal models, long-term administration of AAI barely increased liver tumorigenesis in adult mice, opposite from its tumor-inducing role when subjected to infant mice. Furthermore, AAI induced dose-dependent accumulation of AA-DNA adduct in target organs in adult mice, with the most detected in kidney instead of liver. Taken together, our data indicate that AA exposure was not the major threat of liver cancer in adulthood.

Objective:To screen the serum exosomal microRNAs differentially expressed in early pancreatic cancer patients and evaluate the diagnostic value of exosomal hsa-let-7f-5p.Methods:From January 2019 to January 2020, 19 patients with early pancreatic cancer (early pancreatic cancer group) and 16 patients with chronic mass-forming pancreatitis (pancreatitis group) were selected from Affiliated Hospital of Nanjing University of Chinese Medicine who underwent surgery and were confirmed by pathology. Serum samples of the two groups of patients were collected. At the same time, serum samples of 19 healthy volunteers were selected as the normal control group. The exoEasy Maxi Kit was used to isolate serum exosomes. The structural characteristics of exosomes were observed by transmission electron microscopy (TEM). The particle size of exosomes was observd by nanoparticle tracking analysis. CD 63 and CD 81, the specific protein marker on the surface of exosomes, were identified by western blotting. The total RNA of exosomes was extracted by the miRNeasy Serum/Plasma Kit, and a small RNA library was constructed after quality inspection. With reference to the small RNA database, the differentially expressed exosomal microRNAs in early pancreatic cancer group, pancreatitis group and normal control group were filtered out. The miRNA candidates were validated by quantitative polymerase chain reaction (qPCR) and different expressions of them were analyzed. The role of target genes and metabolic pathways of candidate miRNAs in the occurrence and development of early pancreatic cancer were analyzed by gene ontology (GO) and Kyoto Encyclopeda of Genes and Genomes(KEGG) enrichment pathway. Results:The isolated serum exosomes can be seen to have cup-like vesicle with the double lipid layer by TEM. The main peak of the particle size of target exosomes was about 150 nm. The expression of exosome specific protein markers CD 63 and CD 81 was positive. Comparing the expression of miRNAs among early pancreatic cancer group, pancreatitis group and normal control group, the specific tumor marker exosomal hsa-let-7f-5p was screened out in this study, and its expression in early pancreatic cancer group was significantly higher than that in pancreatitis group and normal control group (both P values <0.05). Receiver operating characteristic curve analysis (ROC) showed that the area under curve (AUC) of exosomal hsa-let-7f-5p to distinguish pancreatic cancer from pancreatitis was 0.843 (95% CI 0.640-1.000). The sensitivity and specificity were 100% and 81.82% respectively. The AUC for distinguishing pancreatic cancer from normal controls was 1.000 (95% CI 1.000-1.000), and both sensitivity and specificity were 100%. The diagnostic efficiency of exosomal hsa-let-7f-5p was equivalent to that of CA19-9 ( P>0.05). The GO analysis results showed that target genes of exosomal hsa-let-7f-5p were mainly involved in complement activation lectin pathway in biological processes, and the proteins expressed by target genes were mainly distributed in cilium, and molecules mostly functioned by combining with nitric-oxide synthase. The KEGG pathway enrichment analysis showed that the target genes were closely related to MAPK signaling pathway. Conclusions:Serum exosomal hsa-let-7f-5p has the potential to be a diagnostic biomarker for early pancreatic cancer.

Objective:To explore the clinical characteristics, possible causes and treatment methods of anaphylactoid reactions related to PICC catheterization.Methods:A retrospective analysis of the data of 27 patients with anaphylactoid reactions in 3 933 PICC catheters from October 2018 to February 2020.Results:The incidence of anaphylactoid reactions was 0.69%(27/3 933), its clinical symptoms were mainly skin reactions, some of which were complicated with respiratory, digestive, cardiovascular system and other symptoms. There was no difference in the incidence of different genders, diagnosis, and history of allergy ( χ2 value was 2.233, 0.839, 0.027, P>0.05). The incidence of patients younger than 60 years old was higher than that of patients older than 60 ( χ2 value was 12.821, P<0.01); the incidence of two catheters with different coatings was higher than that of uncoated catheters ( χ2 value was 27.195, 84.203, P<0.01). Twenty six patients continued the catheterization after the symptoms relieved, and one patient stopped the catheterization. Conclusion:The incidence of anaphylactoid reactions related to PICC, which is more common in catheters or the stylet wire is coated. It is recommended to use a large amount of saline to flush the catheter to reduce or avoid coating materials into the blood, so as to effectively control the occurrence and severity of such complications.

Objective:To compare the difference between the combined diagnostic effect of plasma Septin9(SEPT9) and polyligand Syndecan-2(SDC2) methylation with four serum tumor markers in the diagnosis of colorectal cancer.Methods:In this study, 128 patients who were treated in the affiliated Hospital of Xuzhou Medical University from March to December in 2019 were selected for a case-control study.All the subjects were examined by gastroenteroscopy.According to the pathological results, they were divided into three groups: colorectal cancer group( n=74) and colorectal adenoma group( n=7). The patients with no abnormal or inflammatory polyps or proliferative polyps examined by gastroenteroscopy were taken as the control group( n=47). The methylation levels of SEPT9 gene and SDC2 gene were detected by Roche Lightcycler 480 II real-time fluorescence quantitative polymerase chain reaction, and the concentrations of alpha-fetoprotein, carcinoembryonic antigen, carbohydrate antigen 125 and carbohydrate antigen 199 were detected by Roche Cobas 8000 electrochemiluminescence instrument.Chi-square test was used to compare the positive rate of each marker in the three groups.Medcalc was used to draw the receiver operating characteristic curve (ROC) curve of the subjects′ working characteristic curve, and the value of each index in the diagnosis of colorectal cancer was analyzed. Results:The positive rates of SEPT9 gene and SDC2 gene methylation were 81.1%(60/74) and 67.6%(50/74) respectively in colorectal cancer group, and increased to 85.1%(63/74) after combined detection.The positive detection rates of alpha-fetoprotein, carcinoembryonic antigen, carbohydrate antigen 125 and carbohydrate antigen 199 in colorectal cancer group were 1.4%(1/74), 33.8%(25/74), 6.8%(5/74) and 13.5%(10/74), respectively.When the four tumor markers were detected together, the positive detection rates were only increased to 43.2%(32/74), except for AFP and carbohydrate antigen 125(χ 2=3.847, 2.430, all P>0.05). The differences were statistically significant (χ 2=48.230, 30.487, 43.285, 3.847, 8.788, 6.988, 8.722, all P<0.05). The area under the curve (AUC) of SEPT9 methylation, SDC2 methylation, alpha fetoprotein, carcinoembryonic antigen, carbohydrate antigen 125 and carbohydrate antigen 199 were 0.854 (0.781, 0.910), 0.795 (0.715, 0.861), 0.575 (0.485, 0.662), 0.685 (0.597, 0.764), 0.603 (0.513, 0.689) and 0.631 (0.541, 0.715), respectively.The AUC of combined detection of two DNA methylation markers was better than that of alpha fetoprotein, carcinoembryonic antigen, carbohydrate antigen 125 and carbohydrate antigen 199, and the differences were statistically significant (alpha fetoprotein: Z=4.990, P<0.001; carcinoembryonic antigen: Z=3.743, P<0.001; carbohydrate antigen 125: Z=4.951, P<0.001; carbohydrate antigen 199: Z=3.983, P<0.001). The combined detection of two kinds of gene methylation was better than the combined detection of four kinds of serum markers in the diagnosis of colorectal cancer, and the difference was statistically significant ( Z=3.334, P<0.001). Conclusion:The combined detection of SEPT9 gene and SDC2 gene methylation in plasma is more suitable for non-invasive diagnosis of colorectal cancer than the combined detection of 4 serum tumor markers.