Objective To understand the situation of dental cone beam computed tomography (CBCT) quality control testing phantoms in radiation health technical service institutions in Guangdong province, analyze the differences among different phantoms, and provide a reference for dental CBCT quality control testing. Methods The testing phantoms of 49 radiation health technical service institutions were used as the research objects. The designated CBCT equipment was used for scanning and imaging. The Z-score method was used to evaluate the high-contrast resolution, low-contrast resolution, and distance measurement deviation of each phantom. Results The satisfaction rates of various items for the phantoms in 49 institutions ranged from 85.7% to 100%. The distance measurement deviations of four institutions were “suspicious”, and the high-contrast resolution of four institutions and the distance measurement deviation of one institution were “unsatisfactory”. Conclusion The overall performance of dental CBCT quality control testing phantoms in radiological health technical service institutions in Guangdong province is satisfactory. However, there are still some phantoms with poor results in items such as distance measurement deviation and high-contrast resolution. The structural design, material selection, and manufacturing process of the phantom may all affect the results of quality control testing. Therefore, appropriate phantoms, optimized exposure conditions, and suitable reconstruction algorithms should be used in CBCT quality control testing to ensure accurate and reliable measurements.

BACKGROUND:Marine traditional Chinese medicine offers a potentially effective and less adverse treatment for osteoporosis.OBJECTIVE:To explore the pharmacological regulations and procedures of traditional Chinese medicine in treating osteoporosis through data mining and network pharmacology techniques.METHODS:Data mining and network pharmacology methods were used to study the medication pattern and mechanism of marine Chinese medicine patented prescriptions approved by China National Intellectual Property Administration for the treatment of osteoporosis,and special attention was paid to the core Chinese medicine constituents of these prescriptions.The core constituents of the compound drug group composed of oyster-Dipsacus asper-epimedium were comprehensively identified and analyzed by using ultra-high-performance liquid chromatography tandem mass spectrometry.RESULTS AND CONCLUSION:(1)We collected 381 authorized compound patents for the treatment of osteoporosis from the database inception to April 1,2024.Among these,48 patent groups utilized marine traditional Chinese medicine.These prescriptions contained 183 Chinese herbal medicines,of which 13 marine traditional Chinese medicines were used 574 times in total,and the number of flavors used in a single patented formula ranged from 2 to 41.(2)Oyster was the most frequently used marine ingredient,while Dipsacus asper,epimedium,Rehmannia glutinosa,Eucommia ulmoides Oliv.were the most frequent non-marine components.Association rule analysis identified oyster,Dipsacus asper,and epimedium as the core drug group.Network pharmacology analysis revealed that the core targets of this group for the treatment of osteoporosis included ALB,AKT1,TP53,PPARG,and SRC.Sitosterol,liquiritigenin,japonine,luteolin,and kaempferol were identified as the core components within the marine traditional Chinese medicine prescriptions.(3)The GO and KEGFG enrichment analyses suggested a potential association between the mechanism of the core drug group and the rap1/mapk signaling pathway in the treatment of osteoporosis.(4)The molecular docking verified the beneficial interactions between core components and core targets.(5)The ultra-high-performance liquid chromatography tandem mass spectrometry analysis of the compound medicine confirmed the presence of luteolin,sitosterol,kaempferol,and other components,aligning with the drug components identified by network pharmacology.Quantitative analysis indicated that flavonoids,terpenes,and alkaloids constituted a significant proportion of the compound medicine's components.

Objective Five chloroplast(cp)genomes from members of genus Polygonatum were assembled by hybrid assembly technique,and their intraspecic and interspecific differences were analyzed by comparative genomic method.Codon usage patterns and influencing factors were determined,and the cp genome data were applied to understand the phylogenomic relationships in the entire genus Polygonatum along with the available data.Methods In this study,the chloroplast genomes of 5 species of genus Polygonatum were assembled using Unicycler software.Sequence alignment,collinearity analysis,boundary analysis and other methods were used to evaluate the interspecific differences of these five species.Nucleotide polymorphism analysis was used to discover the high-variation sites of the five species and their related species,predict the distribution of different long repeat sequences and SSRs,and then analyze the use bias of Polygonatum code.Finally,phylogenetic tree was constructed with the coding sequences of other 47 genus Polygonatum and their closely related species to explore their phylogenetic relationships in this study.Results ①Chloroplast genomes of 155 408-155 623 bp were assembled from five species of Polygonatum.A total of 132-133 genes were annotated,and 369 long repeats and 1553 simple repeats were detected.②The contraction and expansion of chloroplast genomes in 8 species were not obvious at the IRs boundary,and the size and distribution of individual genes at the LSC-IRs-SSC boundary,such as ndhF gene and ycf1 gene,were slightly different.No interspecific or intraspecific rearrangement was observed in 8 species.③ The high-variation regions of the 8 chloroplast genomes are mainly located in two single-copy regions,the duplicate copy region is relatively conserved,and the coding region is more conserved than the non-coding region.High nucleotide polymorphic loci rps16-trnQ,trnS-trnG,trnTUGU-trnL,ndhF-rpl32 and rpl32-trnL are located in the single copy region and most of them are gene spacer regions.④ The codon preference results showed that the codon preference of the five species was similar and mainly affected by selection pressure,and the third base of the codon played A dominant role and mainly ended in A/U.RSCU clustering heat map shows that PK and PZ,PCB and PS have close relationship.⑤ Phylogenetic trees divided 52 species into five branches:Ⅰ,Ⅱ,Ⅲ,ⅣandⅤ.PS,PK,PCB,PCZ and PZ were divided into ⅣandⅤbranches,among which PK and PZ were most closely related,while PCZ was more distant than the other four,was divided into the Ⅴbranch alone.Conclusion This study provided a reference for the phylogenetic research and molecular marker development of the medicinal plants of the Polygonum genus.

Objective To investigate the mediating effect of psychological flexibility on the relationship between pain self-efficacy and kinesiophobia in patients with lumbar disc herniation(LDH),so as to provide references for relief from kinesiophobia of the patients.Methods Convenience sampling was used to select 256 patients with LDH as the research subjects from the Outpatient Department of Spinal Orthopaedics of a Grade IIIA hospital in Guangdong Province between May and December 2023.The subjects were surveyed with a general information questionnaire,the kinesiophobia assessment scale,psychological flexibility inventory for pain patients,and chronic pain self-efficacy scale.The mediation effect of psychological flexibility on pain self-efficacy and kinesiophobia was analysed using SPSS 26.0 and the PROCESS 3.5 macro.Results The scores for kinesiophobia,psychological flexibility and pain self-efficacy among the LDH patients were 31.66±4.73,55.26±11.06 and 68.14±17.48,respectively.Kinesiophobia was positively correlated with the psychological flexibility(r=0.545,P<0.001)and negatively correlated with the pain self-efficacy(r=-0.599,P<0.001).The psychological flexibility was negatively correlated with the pain self-efficacy(r=-0.510,P<0.001).Psychological flexibility partially mediated the relationship between pain self-efficacy and kinesiophobia,with a mediating effect of-0.045,accounting for 27.78%of the total effect.Conclusion The patients who have LDH and under conservative treatment exhibit a high level of kinesiophobia and with a moderate levels of pain self-efficacy and psychological flexibility.The medical staff can improve the self-efficacy and psychological flexibility of patients,so as to reduce kinesiophobia level and its incidence.

The coil adverse events in the U.S.Food and Drug Administration Manufacturer and User Facility Device Experience(MAUDE)database from January 2021 to June 2024 were analyzed retrospectively.The risks of coils during the clinical application and their causes were explored with hospital survey and expert demonstration in Shandong Province.Some improving measures were put forward for the safe use of coils,including implementing the main responsibility of the registrant,enhancing the professional skills of the using institutions and strengthening the supervision of the supervisory authorities.[Chinese Medical Equipment Journal,2025,46(6):83-87]

Objective To specifically extract and analyze nascent proteins synthesized by bone marrow mesenchymal stem cells(BMSCs)after transplantation into ischemic hearts using a technique employing mutant methionyl-tRNA synthetase(MetRSL247G)for nascent protein labeling,in order to explore the potential mechanisms of action in BMSCs post-transplantation.Methods Point mutation at position 274 of the MetRS gene in BMSCs was induced via lentiviral infection to enable azidonorleucine(ANL)-mediated labeling of nascent proteins in BMSCs.The labeling efficiency was verified by means of fluorescent non-canonical amino-acid tagging(FUNCAT).Thirty healthy female C57BL/6J mice(8-10 weeks old)were divided into control and experimental groups,with 15 mice in each group.The acute myocardial infarction model was constructed by ligating the left anterior descending coronary artery in experimental group,while control mice underwent only thoracotomy without coronary ligation.After modeling,both groups received intramyocardial injections of MetRSL247G-modified BMSCs(MetRSL247G-BMSCs)at 3 different sites in the peri-infarct ischemic region.Mice were intraperitoneally injected with ANL every 6 hours for 4 times on postoperative days 0,2,and 6(n=5 for each time point)respectively,euthanized 24 h after the last injection,and cardiac tissues were isolated.The newly synthesized and labeled proteins produced by BMSCs after transplantation into the myocardium of experimental and control groups were collected,using an enrichment technique for ANL-tagged proteins and liquid chromatography-tandem mass spectrometry(LC-MS)analysis.Gene ontology(GO)analysis,Kyoto Encyclopedia of Genes and Genomes(KEGG)pathway analysis,protein-protein interaction(PPI)analysis,and heatmap visualization analysis were performed to identify differentially expressed proteins at the 3 time points and screen key pathways and genes.Results Under fluorescence microscopy,the MetRSL247G lentivirus-infected BMSCs were observed to be labelled with mCherry signals,confirming the successful construction of the MetRSL247G-BMSCs cell line.Green fluorescent signals were detected only in nascent proteins in culture medium containing both MetRSL247G-BMSCs and ANL,validating the sensitivity and specificity of the labeling method.GO analysis revealed that differentially expressed proteins were primarily involved in basic cellular biological processes such as extracellular exosome formation,extracellular matrix organization,and focal adhesion.KEGG and PPI analyses indicated that the differential proteins were mainly involved in complement and coagulation cascade pathway,actin cytoskeleton regulation pathway,and apoptosis pathway.Heatmap analysis showed significantly upregulated expression of anti-apoptosis and cell adhesion-related factors in experimental group on day 1(P＜0.05),upregulated anti-apoptotic factors,pro-apoptotic factors,and cell adhesion-related factors on day 3(P＜0.05),and upregulated anti-apoptotic factors,cell differentiation-related factors,and cell adhesion-related factors on day 7(P＜0.05)compared with control group.Expression of apoptosis-inducing factor 1 was significantly downregulated on days 1 and 7(P＜0.05).On day 3,most differentially expressed proteins,including anti-apoptosis factors(Protein S100-A11,Clusterin,Gelsolin),pro-apoptosis factor(Cathepsin B),cell differentiation-related factor(Transgelin-2),and cell adhesion-related factors(Cofilin-1,Periostin,Fibronectin)were significantly upregulated(P＜0.05).Conclusions The MetRSL247G mutation enables BMSCs to incorporate ANL and synthesize labeled proteins,confirming the feasibility of this nascent protein labeling technique.Nascent proteins of BMSCs in ischemic myocardium primarily contribute to extracellular exosome secretion and extracellular matrix organization.BMSCs may adapt to and respond to ischemic and hypoxic environments by influencing complement and coagulation cascades,activating inflammatory factors,regulating actin cytoskeleton structure,and modulating apoptosis,thereby maintaining the survival of BMSCs.

Objective:To investigate the correlations and regression models among adenoid-nasopharynx measurement indices (the linear ratio A/N, the two-dimensional area ratio 2D_A/N, and the three-dimensional volume ratio 3D_A/N), to evaluate the feasibility of predicting three-dimensional parameters from two-dimensional measurements.Methods:This cross-sectional study analysed 4 307 CBCT scans and lateral nasopharyngeal radiographs from 4-12-year-old children (July 2023-January 2025). Children with acute infection, major systemic disease, craniofacial anomalies, prior maxillofacial surgery, poor-quality images, or no consent were excluded. 3D_A/N was defined as adenoid volume/(adenoid+airway volume); 2D_A/N as adenoid area/total area; and linear A/N as adenoid thickness/nasopharyngeal thickness. Pearson correlation and multiple linear regression were used to quantify 2D-to-3D agreement, and independent-sample t-tests were employed to compare age, sex and seasonal subgroups. Results:(1) Significant sex-related differences in adenoid hypertrophy were detected at ages 5, 8, 9 and 11 years. In the 5-year-old group, females had significantly higher 3D_A/N and 2D_A/N values than males (3D_A/N: 0.76±0.10 vs. 0.74±0.10, t=-1.99, P=0.047; 2D_A/N: 0.66±0.10 vs. 0.64±0.09, t=-2.71, P=0.007). In the 8-year-old group, males exhibited significantly higher A/N and 3D_A/N values than females (A/N: 0.64±0.06 vs. 0.63±0.06, t=4.49, P<0.001; 3D_A/N: 0.66±0.12 vs. 0.64±0.12, t=2.00, P=0.046). In the 9-year-old group, males showed significantly higher 3D_A/N values than females (0.65±0.11 vs. 0.63±0.12, t=2.46, P=0.014). In the 11-year-old group, males had significantly higher A/N values than females (0.62±0.06 vs. 0.59±0.05, t=4.79, P<0.001). (2) The linear A/N ratio correlated moderately with 3D_A/N ( r=0.82), whereas, 2D_A/N showed an excellent correlation ( r=0.97); multiple regression confirmed 2D_A/N as the principal predictor of 3D_A/N. (3) Seasonal analysis revealed markedly greater adenoid hypertrophy in winter than in summer for children aged 4-9 years, while, no seasonal difference was found in the 10-12 year group; overall, winter hypertrophy was most pronounced in younger children. Conclusion:2D_A/N demonstrates a marked advantage in predicting 3D_A/N. When combined with A/N and age factors, it can effectively model changes in the 3D volume ratio of the adenoid, underscoring the clinical value of lateral cephalometric measurements for evaluating adenoid hypertrophy in children. Moreover, adenoid hypertrophy is influenced by age, sex and seasonal factors.

With the rapid development of competitive sports, the incidence of anterior cruciate ligament (ACL) injury is on the rise. Such injuries may shorten athletes′ career and lead to other long-term adverse consequences. Although athletes generally recover well after ACL reconstruction, many still struggle to return to their pre-injury performance levels. Advances in the understanding of ACL anatomy and injury mechanisms, along with the evolution of surgical techniques and rehabilitation methods, have provided more individualized and tailored options for athletes following ACL injuries. However, there is currently no consensus in China regarding surgical and rehabilitation strategies for competitive athletes aiming to return to sports after ACL injuries. To this end, the Sports Medicine Committee of the Chinese Research Hospital Association and the Editorial Board of the Chinese Journal of Trauma jointly formulated the Expert consensus on surgical treatment and rehabilitation for competitive sports athletes returning to sports after anterior cruciate ligament injury ( version 2025), and presented 14 recommendations covering surgical indications, preoperative rehabilitation, surgical timing, surgical strategies and postoperative rehabilitation strategies, aiming to improve the surgical treatment and rehabilitation system for ACL injuries in competitive athletes and facilitate their return to high-level sports performance after injury.

Objective:To investigate the prevalence and influencing factors of kinesiophobia in chronic pain patients undergoing conservative treatment for lumbar disc herniation (LDH), providing reference and basis for reducing the occurrence of kinesiophobia in this patient population.Methods:A cross-sectional study was conducted from May 2023 to January 2024. A convenience sample of chronic pain patients undergoing conservative treatment for LDH in Guangdong Second Provincial General Hospital was selected as the study population. Data were collected by the general information questionnaire, Numerical Rating Scale, Tampa Scale of Kinesiophobia-11, Psychological Inflexibility in Pain Scale, and Chronic Pain Self-efficacy Scale. A random forest model was constructed to rank variable importance, and binary Logistic regression was used to analyze the influencing factors of kinesiophobia.Results:The effective response rate of the questionnaire was 96.8% (270/279). Among 270 patients, there were 139 males and 131 females, 92 patients aged 18-40 years, 132 patients aged 41-60 years, and 46 patients aged >60 years old. The total kinesiophobia score for chronic pain patients undergoing conservative treatment for LDH was (31.00 ± 5.09) points, with a kinesiophobia prevalence of 79.6% (215/270). The random forest algorithm identified eight influencing factors: pain self-efficacy, psychological flexibility, physical exercise after low back pain onset, duration of pain, pain status, understanding of LDH, marital status, and pain intensity. Binary Logistic regression analysis showed that physical exercise after low back pain onset ( OR=0.583, 95% CI 0.344-0.986), pain status ( OR=0.424, 95% CI 0.206-0.873), psychological flexibility ( OR=1.102, 95% CI 1.052-1.155), pain self-efficacy ( OR=0.923, 95% CI 0.895-0.953) were significant influencing factors of kinesiophobia in chronic pain patients undergoing conservative treatment for LDH (all P<0.05). Conclusions:The prevalence of kinesiophobia is high among chronic pain patients undergoing conservative treatment for LDH. Physical exercise after low back pain onset, pain status, psychological flexibility, and pain self-efficacy are significant influencing factors. Healthcare professionals should pay increased attention to kinesiophobia in chronic pain patients undergoing conservative treatment for LDH and implement targeted early interventions to reduce its occurrence.