Objective To screen key differentially expressed genes in head and neck squamous cell carcinoma(HNSCC)and analyze their prognostic value,based on biological information from gene expression omnibus(GEO)and the cancer genome atlas(TCGA)databases.Methods HNSCC mRNA expression data(GSE74530)were downloaded from the GEO database as a test dataset,and differentially expressed genes(DEGs)were identified.The biological function of DEGs in HNSCC was investigated by gene ontology(GO)and Kyoto Encyclopedia of Genes and Genomes(KEGG)enrichment analysis.HNSCC mRNA expression data were obtained from the TCGA database as a validation dataset to preliminarily verify the expression of DEGs in HNSCC tissues and normal tissues.Seven up-regulated DEGs variants were analyzed using the cBioPortal database,and their effects on the survival of HNSCC patients were evaluated by the Kaplan-meier method and COX regression analysis.The co-expressed genes of ATP6V1C1 were analyzed by the cBioPortal database.Results A total of 1 432 differential genes were screened from HNSCC tissue and paracancerous tissue in the GSE74530 test dataset,among which 7 of the 10 most significant genes were up-regulated,respectively:MMP1,WDR66,PTPRZ1,TEAD4,RBM38,ATP6V1C1 and CBLB were downregulated by CGNL1,LOC100506990 and ADH1B.GO and KEGG enrichment analysis showed that HNSCC tissue differential genes were mainly enriched in lymphocyte migration and extracellular matrix regulation pathways.The TCGA dataset confirmed that 7 upregulated DEGs were highly expressed in HNSCC.cBioPortal analysis showed that the proportion of ATP6V1C1 gene changes was the highest among the 7 up-regulated genes,and the overall survival rate of patients with high expression of ATP6V1C1 gene decreased significantly.Correlation analysis showed that BIRC5 was the most closely related gene to ATP6V1C1.Conclusion MMP1,WDR66,PTPRZ1,TEAD4,RBM38,ATP6V1C1 and CBLB were highly expressed in HNSCC patients,among which ATP6V1C1 was the most significant,and its expression level was associated with poor prognosis in HNSCC patients.ATP6V1C1 is expected to be a biomarker for early diagnosis and prognosis of HNSCC,providing a new idea for clinical diagnosis and treatment.

For middle-aged and elderly patients with conditions such as spinal fractures and degenerative spinal diseases, spinal internal fixation is a core surgical procedure for reconstructing spinal stability, heavily relying on the biomechanical stability provided by pedicle screw systems. Whereas, these patients are often complicated by osteoporosis that can significantly compromise the stability of the bone-pedicle screw interface, leading to a marked increase in pedicle screw loosening and surgical failure rates. The bone cement-augmented pedicle screw technique, which involves injecting bone cement into the vertebral body or screw trajectory to optimize the mechanical properties of the bone-pedicle screw composite, has been proven to significantly enhance fixation strength and effectively prevent screw-related failures, thereby reducing the incidence of internal fixation failure in high-risk populations undergoing spinal fusion. However, the widespread clinical application of this technique has faced challenges such as inaccurate clinical decision-making (indication and contraindication selection), non-standardized operative practices, and insufficient awareness of complication prevention, resulting in considerable variability in clinical outcomes and even severe complications. To address this, Prof. Luo Fei from First Affiliated Hospital of Army Medical University initiated the project and the Chinese Association Orthopaedic Surgeons organized relevant experts to develop the Evidence-based clinical practice guideline for bone cement-augmented pedicle screw technique ( version 2025), based on current evidence. The guidelines put forward 8 recommendations regarding the clinical value, scope of application, and operational standards of the technique, aiming to provide evidence-based medical support and technical standardization for clinical decision-making.

Objective To screen key differentially expressed genes in head and neck squamous cell carcinoma(HNSCC)and analyze their prognostic value,based on biological information from gene expression omnibus(GEO)and the cancer genome atlas(TCGA)databases.Methods HNSCC mRNA expression data(GSE74530)were downloaded from the GEO database as a test dataset,and differentially expressed genes(DEGs)were identified.The biological function of DEGs in HNSCC was investigated by gene ontology(GO)and Kyoto Encyclopedia of Genes and Genomes(KEGG)enrichment analysis.HNSCC mRNA expression data were obtained from the TCGA database as a validation dataset to preliminarily verify the expression of DEGs in HNSCC tissues and normal tissues.Seven up-regulated DEGs variants were analyzed using the cBioPortal database,and their effects on the survival of HNSCC patients were evaluated by the Kaplan-meier method and COX regression analysis.The co-expressed genes of ATP6V1C1 were analyzed by the cBioPortal database.Results A total of 1 432 differential genes were screened from HNSCC tissue and paracancerous tissue in the GSE74530 test dataset,among which 7 of the 10 most significant genes were up-regulated,respectively:MMP1,WDR66,PTPRZ1,TEAD4,RBM38,ATP6V1C1 and CBLB were downregulated by CGNL1,LOC100506990 and ADH1B.GO and KEGG enrichment analysis showed that HNSCC tissue differential genes were mainly enriched in lymphocyte migration and extracellular matrix regulation pathways.The TCGA dataset confirmed that 7 upregulated DEGs were highly expressed in HNSCC.cBioPortal analysis showed that the proportion of ATP6V1C1 gene changes was the highest among the 7 up-regulated genes,and the overall survival rate of patients with high expression of ATP6V1C1 gene decreased significantly.Correlation analysis showed that BIRC5 was the most closely related gene to ATP6V1C1.Conclusion MMP1,WDR66,PTPRZ1,TEAD4,RBM38,ATP6V1C1 and CBLB were highly expressed in HNSCC patients,among which ATP6V1C1 was the most significant,and its expression level was associated with poor prognosis in HNSCC patients.ATP6V1C1 is expected to be a biomarker for early diagnosis and prognosis of HNSCC,providing a new idea for clinical diagnosis and treatment.

For middle-aged and elderly patients with conditions such as spinal fractures and degenerative spinal diseases, spinal internal fixation is a core surgical procedure for reconstructing spinal stability, heavily relying on the biomechanical stability provided by pedicle screw systems. Whereas, these patients are often complicated by osteoporosis that can significantly compromise the stability of the bone-pedicle screw interface, leading to a marked increase in pedicle screw loosening and surgical failure rates. The bone cement-augmented pedicle screw technique, which involves injecting bone cement into the vertebral body or screw trajectory to optimize the mechanical properties of the bone-pedicle screw composite, has been proven to significantly enhance fixation strength and effectively prevent screw-related failures, thereby reducing the incidence of internal fixation failure in high-risk populations undergoing spinal fusion. However, the widespread clinical application of this technique has faced challenges such as inaccurate clinical decision-making (indication and contraindication selection), non-standardized operative practices, and insufficient awareness of complication prevention, resulting in considerable variability in clinical outcomes and even severe complications. To address this, Prof. Luo Fei from First Affiliated Hospital of Army Medical University initiated the project and the Chinese Association Orthopaedic Surgeons organized relevant experts to develop the Evidence-based clinical practice guideline for bone cement-augmented pedicle screw technique ( version 2025), based on current evidence. The guidelines put forward 8 recommendations regarding the clinical value, scope of application, and operational standards of the technique, aiming to provide evidence-based medical support and technical standardization for clinical decision-making.

Objective:To analyze the efficacy of anterior cervical Hybrid surgery and posterior cervical expansive open-door laminoplasty(EODL)in the treatment of multilevel cervical spondylotic myelopathy,and to discuss the selection of surgical methods for the patients with multilevel cervical spondylotic myelopathy.Methods:The retrospective analysis was conducted of 70 patients with multilevel cervical spondylotic myelopathy who underwent surgery at Affilated Beijing Traditional Chinese Medicine Hospital of Capital Medical University from July 2017 to July 2020.Based on the different surgical methods,the patients were divided into anterior group(n=35)and posterior group(n=35).The patients in anterior group underwent Hybrid surgery[anterior cervical discectomy and fusion(ACDF)combined with artificial cervical disc replacement(ACDR)],and the patients in posterior group underwent EODL.The hospitalization time,operation time,intraoperative blood loss,and postoperative drainage volume of the patients in two groups were recorded;the efficacy was evaluated by Japanese orthopaedic association(JOA)score,JOA improvement rate,neck disability index(NDI),visual analogue scale(VAS)for pain,and postoperative satisfaction score;the complications of the patients in two groups after surgery were recorded.Results:Compared with posterior group,the intraoperative blood loss,postoperative drainage volume,hospitalization time,and operation time of the patients in anterior group were significantly decreased(P<0.01),and the preoperative score had no significant difference(P>0.05).At the final follow-up after surgery,compared with posterior group,the JOA score and JOA improvement rate of the patients in anterior group were significantly increased(P<0.01),and the NDI score and VAS score were significantly decreased(P<0.01).Compared with before surgery,the JOA scores of the patients in two groups at the final follow-up after surgery were increased(P<0.01),and the NDI and VAS scores were significant decreased(P<0.01).The postoperative satisfaction of the patients in two groups was high based on the postoperative satisfaction score.There was no significant difference in the incidence of postoperative complication of the patients between two groups(P>0.05).Conclusion:Both the anterior cervical Hybrid surgery and EODL achieve the satisfactory results in the treatment of multilevel cervical spondylotic myelopathy.Hybrid surgery has the advantages of less bleeding and shorter surgery time,and the most suitable surgical method should be chosen clinically based on the actual situation of the patients.

Objective:To explore the correlation between c-myc and glutaminase(GLS)and glutamine synthase(GS)in oral epider-moid carcinoma cells in animal models.Methods:Immunohistochemistry was used to detect the expression of c-myc,GLS and GS in clinical samples of oral cancer.KB cell model with stable and high expression of c-myc was established and verified,then the KB cells were transplanted into nude mice to establish mouse tumorigenic models.The cells and nude mouse models were respectively diveded into 3 groups(n=6):normal cotnrol,empty vector and c-myc overexpression groups.The tumor growth was observed.The expression of c-myc,GLS and GS in the cells and the tumor samples was detected by immunohistochemistry.Results:c-myc,GLS and GS were highly expressed in clinical samples of oral cancer.In the cells of c-myc overexpression group c-myc mRNA expression level was sig-nificantly higher than that of empty vector control group.The tumorigenic models were formed in all nude mice of the groups,and the volume and weight of the c-myc overexpression group increased more significantly(P＜0.01),in the c-myc overexpression group c-myc was overexpressed,the expression of GLS and GS was significantly higher than that in the other 2 groups.Conclusion:c-myc is highly expressed in oral cancer,and may up-regulate GLS and GS expression.

Objective:To explore the role and mechanism of nuclear factor erythroid 2-related factor 2 (NRF2) in lung injury in mice with Staphylococcus aureus-induced sepsis. Methods:A sepsis mouse model with Staphylococcus aureus infection was created using wild-type C57BL/6 male mice and NRF2 -/- male mice aged six to eight weeks. The mice were divided into four groups with five in each group. In WT control group and NRF2 -/- control group, the wild type mice and NRF2 -/- mice were intraperitoneally injected with 100 μL phosphate buffered saline (PBS) respectively. In WT model group and NRF2 -/- model group, the wild type mice and NRF2 -/- mice were intraperitoneally injected with 100 μL PBS containing Staphylococcus aureus (3×10 8 colony forming unit (CFU)/mL) respectively. The lung samples were taken under anesthesia six hours after injection, and hematoxylin and eosin staining was performed to observe tissuse lesions. The survival of the mice was evaluated. The protein concentrations and cell counts in the bronchoalveolar lavage fluid (BALF), the mRNA relative expressions of tumor necrosis factor-alpha (TNF-α), interleukin-6 (IL-6), and interleukin-1 beta (IL-1β) in lung tissues, and the serum levels of myeloperoxidase (MPO), malondialdehyde (MDA), and superoxide dismutase (SOD) were compared among the four groups. Independent samples t test was used for statistical comparison. Results:After six days of observation, no mice died in WT control group and NRF2 -/- control group, three mice died in WT model group on day 3, and four mice died in NRF2 -/- model group on day 4. The pathological staining showed that macrophage infiltration and alveolar structure damage occurred in the lung tissuse of WT model group, and the damage were more significant in NRF2 -/- model group. The protein concentrations and cell counts in BALF of mice in WT control group were (342±23) μg/mL and (5.78±2.67)×10 5/mL, respectively, those in WT model group were (657±39) μg/mL and (10.78±5.57)×10 5/mL, respectively, those in NRF2 -/- control group were (312±45) μg/mL and (5.67±1.46)×10 5/mL, respectively, and those in NRF2 -/- model group were (957±85) μg/mL and (13.85±3.72)×10 5/mL, respectively. The protein concentrations and cell counts in WT model group were higher than those in WT control group ( t=6.56, P<0.001 and t=8.21, P<0.001, respectively), while lower than NRF2 -/- model group ( t=2.32, P=0.001 and t=3.11, P=0.002, respectively). The differences were all statistically significant. Compared with the WT model group, the mRNA relative expressions of TNF-α (4.345±1.131 vs 12.375±4.534), IL-1β (5.395±2.112 vs 6.865±2.185), IL-6 (2.964±0.945 vs 5.467±1.855) in the lung tissues of NRF2 -/- model group increased, and the serum levels of MPO (2.956±1.211 vs 4.745±1.945) and MDA (4.333±1.652 vs 8.234±3.734) increased, while the level of SOD (17.121±8.183 vs 11.967±8.122) decreased, with statistically differences ( t=1.77, 4.67, 2.99, 7.99, 10.45 and 8.45, respectively, all P<0.05). Conclusions:The absence of NRF2 gene can exacerbate the inflammatory response and oxidative stress in mice with Staphylococcus aureus-induced sepsis, leading to more severe lung tissue damage.

Objective:To explore the role and mechanism of nuclear factor erythroid 2-related factor 2 (NRF2) in lung injury in mice with Staphylococcus aureus-induced sepsis. Methods:A sepsis mouse model with Staphylococcus aureus infection was created using wild-type C57BL/6 male mice and NRF2 -/- male mice aged six to eight weeks. The mice were divided into four groups with five in each group. In WT control group and NRF2 -/- control group, the wild type mice and NRF2 -/- mice were intraperitoneally injected with 100 μL phosphate buffered saline (PBS) respectively. In WT model group and NRF2 -/- model group, the wild type mice and NRF2 -/- mice were intraperitoneally injected with 100 μL PBS containing Staphylococcus aureus (3×10 8 colony forming unit (CFU)/mL) respectively. The lung samples were taken under anesthesia six hours after injection, and hematoxylin and eosin staining was performed to observe tissuse lesions. The survival of the mice was evaluated. The protein concentrations and cell counts in the bronchoalveolar lavage fluid (BALF), the mRNA relative expressions of tumor necrosis factor-alpha (TNF-α), interleukin-6 (IL-6), and interleukin-1 beta (IL-1β) in lung tissues, and the serum levels of myeloperoxidase (MPO), malondialdehyde (MDA), and superoxide dismutase (SOD) were compared among the four groups. Independent samples t test was used for statistical comparison. Results:After six days of observation, no mice died in WT control group and NRF2 -/- control group, three mice died in WT model group on day 3, and four mice died in NRF2 -/- model group on day 4. The pathological staining showed that macrophage infiltration and alveolar structure damage occurred in the lung tissuse of WT model group, and the damage were more significant in NRF2 -/- model group. The protein concentrations and cell counts in BALF of mice in WT control group were (342±23) μg/mL and (5.78±2.67)×10 5/mL, respectively, those in WT model group were (657±39) μg/mL and (10.78±5.57)×10 5/mL, respectively, those in NRF2 -/- control group were (312±45) μg/mL and (5.67±1.46)×10 5/mL, respectively, and those in NRF2 -/- model group were (957±85) μg/mL and (13.85±3.72)×10 5/mL, respectively. The protein concentrations and cell counts in WT model group were higher than those in WT control group ( t=6.56, P<0.001 and t=8.21, P<0.001, respectively), while lower than NRF2 -/- model group ( t=2.32, P=0.001 and t=3.11, P=0.002, respectively). The differences were all statistically significant. Compared with the WT model group, the mRNA relative expressions of TNF-α (4.345±1.131 vs 12.375±4.534), IL-1β (5.395±2.112 vs 6.865±2.185), IL-6 (2.964±0.945 vs 5.467±1.855) in the lung tissues of NRF2 -/- model group increased, and the serum levels of MPO (2.956±1.211 vs 4.745±1.945) and MDA (4.333±1.652 vs 8.234±3.734) increased, while the level of SOD (17.121±8.183 vs 11.967±8.122) decreased, with statistically differences ( t=1.77, 4.67, 2.99, 7.99, 10.45 and 8.45, respectively, all P<0.05). Conclusions:The absence of NRF2 gene can exacerbate the inflammatory response and oxidative stress in mice with Staphylococcus aureus-induced sepsis, leading to more severe lung tissue damage.

Background Dentists are a high-risk population of work-related musculoskeletal disorders (WMSDs), where the body part with the highest prevalence is the neck. Objective To analyze potential influencing factors of neck pain among dentists, and explore a prediction model of neck pain in dentists. Methods Dentists from different hospitals in Fuzhou were selected as study subjects by stratified cluster sampling according to hospital characteristics (dental hospitals, general hospitals, and dental clinics). The basic information, presentation of WMSDs, and its influencing factors were investigated by using the Chinese version of Musculoskeletal Disorders Questionnaire and the Subjective Workload Assessment Technique. A total of 655 questionnaires were collected, of which 603 were valid, with an effective rate of 92.1%. Multiple logistic regression was used to analyze potential influencing factors of neck pain in dentists. A prediction model of neck pain of dentists was constructed by using neural network model, and the prediction efficiency of the model was evaluated. Results The neck was the body part with the highest prevalence (43.8%, 264/603) of WMSDs among dentists. The results of multiple logistic regression analysis showed that female (OR=2.709, 95%CI: 1.852-3.962, P <0.001), working age of 10-<20 years (versus <10 years, OR=3.836, 95%CI: 2.471-5.957, P<0.001), keeping head up or down for a long time (OR=8.492, 95%CI: 2.203-32.731, P=0.002), holding head sideways for a long time (OR=2.210, 95%CI: 1.376-3.550, P<0.001), maintaining the same sitting spot for a long time (OR=4.336, 95%CI: 2.192-8.579, P<0.001), and psychological load value ≥70 (versus <40, OR=1.901, 95%CI: 1.038-3.480, P=0.037) increased the risk of neck pain in dentists. Sufficient operating space (OR=0.507, 95%CI: 0.302-0.850, P=0.010) and doing some exercise during work break (OR=0.670, 95%CI: 0.453-0.991, P=0.045) reduced the risk of reporting neck pain among dentists. A neural network prediction model of dentists' neck pain was constructed with 1 hidden layer and 6 hidden layer neurons. The percentage of correct prediction of training set was 89.6%, and the percentage of correct prediction of test set was 83.9%. The order of importance of the independent variables included in the model were working age, holding head sideways for a long time, psychological load, etc. The result of neural network model of neck pain among dentists showed that the area under the curve of receiver operator characteristic (ROC) was 0.940 (95%CI: 0.922-0.958, P<0.001). When the maximum diagnostic value was determined by the ROC curve, the sensitivity was 84.8%, the specificity was 91.2%, and the Youden Index was 0.760. Conclusion Neck pain of dentists is affected by many factors, such as individual factors (gender and working age), ergonomic factors (keeping various postures and operations for a long time, operating space, etc.), psychological factors (different levels of psychological load) and so on. The neural network model can be used as a prediction tool to explore the risk of reporting neck pain among dentists.

Objective    To analyze the risk factors for esophagogastric anastomotic leakage (EGAL) after esophageal cancer surgery, and to establish a risk prediction model for early prevention and treatment. Methods    Clinical data of patients undergoing esophagectomy in our hospital from January 2013 to October 2020 were retrospectively analyzed. The independent risk factors for postoperative EGAL were analyzed by univariate and multivariate logistic regression analyses, and a clinical nomogram prediction model was established. According to whether EGAL occurred after operation, the patients were divided into an anastomotic fistula group and a non-anastomotic fistula group. Results    A total of 303 patiens were enrolled, including 267 males and 36 females with a mean age of 62.30±7.36 years. The incidence rate of postoperative EGAL was 15.2% (46/303). The multivariate logistic regression analysis showed that high blood pressure, chronic bronchitis, peptic ulcer, operation way, the number of lymph node dissected, anastomotic way, the number of intraoperative chest drainage tube, tumor location, no-supplementing albumin in the first three days after operation, postoperative pulmonary infection, postoperative use of bronchoscope were the independent risk factors for EGAL after esophageal cancer surgery (P<0.05). A prognostic nomogram model was established based on these factors with the area under the receiver operating characteristic curve of 0.954 (95%CI 0.924-0.975), indicating a high predictive  value. Conclusion    The clinical prediction model based on 11 perioperative risk factors in the study has a good evaluation efficacy and can promote the early detection, diagnosis and treatment of EGAL.