Osteosarcoma is a primary bone tumor originating from mesenchymal tissues,highly aggressive and metastatic,and is one of the causes of orthopedic disorders in children and adolescents.The establishment of an osteosarcoma model is useful for studying the changes in the physiology and pathology of the organism after the occurrence of osteosarcoma.The establishment methods of osteosarcoma models not only differ in terms of difficulty,tumorigenicity,tumor-formation time,tumor survival time,tumor metastasis,and safety,but also in terms of simulating human osteosarcoma biological characteristics and histological features.In addition,the wide application of tissue engineering in tumor modeling is conducive to better study the role of the osteosarcoma microenvironment in osteosarcoma genesis and development.In this paper,we summarize the roles of different osteosarcoma animal models and their tissue engineering models in different experiments,in order to provide help for the study of osteosarcoma pathogenesis and drug intervention mechanism.

Objective:To observe the clinical characteristics of elderly patients with demyelinating optic neuritis (DON), and preliminarily analyze the related factors affecting their visual prognosis.Methods:A observational clinical case-control study. A total of 107 patients with DON who were diagnosed and hospitalized in Beijing Tongren Hospital and its medical alliance Department of Ophthalmology, Beijing Puren Hospital from March 2019 to October 2023 were included in this study. Detailed medical histories were recorded, including time of onset, presence of ocular pain, treatment modalities, and follow-up status. All affected eyes underwent best-corrected visual acuity (BCVA) testing, orbital magnetic resonance imaging (MRI), and laboratory tests, including erythrocyte sedimentation rate (ESR), antinuclear antibodies (ANA), extractable nuclear antigens (ENA), aquaporin-4 (AQP4) antibodies, and myelin oligodendrocyte glycoprotein (MOG) antibodies in peripheral blood. Based on age, patients were categorized into the elderly DON group (≥50 years) and the young and middle-aged DON group (<50 years), comprising 50 and 57 cases, respectively. Furthermore, the elderly DON group was subdivided by serum-specific antibody status into the AQP4 antibody-positive ON group (AQP4-ON group), the MOG antibody-positive ON group (MOG-ON group), and the double-negative ON group (DN-ON group), with 18, 10, and 22 cases respectively. The median follow-up duration was 36 months. Follow-up assessments were conducted using the same equipment, methods, and relevant examinations as those applied at baseline. Binary logistic regression analysis was performed to identify factors associated with visual prognosis in elderly DON patients.Results:Compared with the DON group of young and middle-aged people, the incidence of binocular disease, accelerated ESR, MRI imaging score, the incidence of combined cardiovascular and cerebrovascular diseases, diabetes, tumors, and the proportion of adverse reactions of glucocorticoids in the elderly group were higher, and the proportion of ocular pain was lower. The differences were statistically significant ( P<0.05). Six months after the treatment, the number of cases with BCVA> 0.3 in the affected eyes in the elderly DON group and the young and middle-aged DON group was 28 (56.0%, 28/50) and 42 (73.7%, 42/57), respectively. The number of patients with BCVA> 0.3 in the elderly DON group was significantly lower than that in the young and middle-aged DON group, and the difference was statistically significant ( P=0.034). Moreover, with the increase of age, the degree of improvement in visual acuity showed a decreasing trend. The proportion of females in the AQP4-ON group, the proportion of optic chiasm and posterior optic pathway involvement in acute MRI, and the positive rate of ANA/ENA were significantly higher than those in the MOG-ON group and the DN-ON group, and the differences were statistically significant ( P<0.05). The rate of optic disc edema in the MOG-ON group was significantly higher than that in the AQP4-ON group, and the difference was statistically significant ( P=0.031). One and six months after treatment, the BCVA in the MOG-ON group was significantly better than that in the AQP4-ON group and the DN-ON group, and the difference was statistically significant ( P<0.05). The results of binary logistic regression analysis showed that at the onset of the disease, BCVA <0.01 [odds ratio ( OR) =2.60, 95% confidence interval ( CI) 1.23-5.52, P=0.013] and accelerated ESR ( OR=4.68, 95% CI 1.08-20.18, P=0.039) was an independent risk factor affecting the prognosis of BCVA in elderly patients with DON. Conclusions:There are different clinical characteristics between elderly DON patients and young and middle-aged patients. The risk of combined systemic diseases and side effects of glucocorticoids is higher, and the visual prognosis is worse. There are also differences in clinical characteristics and visual prognosis among subgroups of different serological antibodies in elderly DON. Advanced age, the lowest visual acuity at onset and immune inflammatory indicators are all factors affecting the visual prognosis of DON.

Osteosarcoma is a primary bone tumor originating from mesenchymal tissues,highly aggressive and metastatic,and is one of the causes of orthopedic disorders in children and adolescents.The establishment of an osteosarcoma model is useful for studying the changes in the physiology and pathology of the organism after the occurrence of osteosarcoma.The establishment methods of osteosarcoma models not only differ in terms of difficulty,tumorigenicity,tumor-formation time,tumor survival time,tumor metastasis,and safety,but also in terms of simulating human osteosarcoma biological characteristics and histological features.In addition,the wide application of tissue engineering in tumor modeling is conducive to better study the role of the osteosarcoma microenvironment in osteosarcoma genesis and development.In this paper,we summarize the roles of different osteosarcoma animal models and their tissue engineering models in different experiments,in order to provide help for the study of osteosarcoma pathogenesis and drug intervention mechanism.

Objective:To observe the clinical characteristics of elderly patients with demyelinating optic neuritis (DON), and preliminarily analyze the related factors affecting their visual prognosis.Methods:A observational clinical case-control study. A total of 107 patients with DON who were diagnosed and hospitalized in Beijing Tongren Hospital and its medical alliance Department of Ophthalmology, Beijing Puren Hospital from March 2019 to October 2023 were included in this study. Detailed medical histories were recorded, including time of onset, presence of ocular pain, treatment modalities, and follow-up status. All affected eyes underwent best-corrected visual acuity (BCVA) testing, orbital magnetic resonance imaging (MRI), and laboratory tests, including erythrocyte sedimentation rate (ESR), antinuclear antibodies (ANA), extractable nuclear antigens (ENA), aquaporin-4 (AQP4) antibodies, and myelin oligodendrocyte glycoprotein (MOG) antibodies in peripheral blood. Based on age, patients were categorized into the elderly DON group (≥50 years) and the young and middle-aged DON group (<50 years), comprising 50 and 57 cases, respectively. Furthermore, the elderly DON group was subdivided by serum-specific antibody status into the AQP4 antibody-positive ON group (AQP4-ON group), the MOG antibody-positive ON group (MOG-ON group), and the double-negative ON group (DN-ON group), with 18, 10, and 22 cases respectively. The median follow-up duration was 36 months. Follow-up assessments were conducted using the same equipment, methods, and relevant examinations as those applied at baseline. Binary logistic regression analysis was performed to identify factors associated with visual prognosis in elderly DON patients.Results:Compared with the DON group of young and middle-aged people, the incidence of binocular disease, accelerated ESR, MRI imaging score, the incidence of combined cardiovascular and cerebrovascular diseases, diabetes, tumors, and the proportion of adverse reactions of glucocorticoids in the elderly group were higher, and the proportion of ocular pain was lower. The differences were statistically significant ( P<0.05). Six months after the treatment, the number of cases with BCVA> 0.3 in the affected eyes in the elderly DON group and the young and middle-aged DON group was 28 (56.0%, 28/50) and 42 (73.7%, 42/57), respectively. The number of patients with BCVA> 0.3 in the elderly DON group was significantly lower than that in the young and middle-aged DON group, and the difference was statistically significant ( P=0.034). Moreover, with the increase of age, the degree of improvement in visual acuity showed a decreasing trend. The proportion of females in the AQP4-ON group, the proportion of optic chiasm and posterior optic pathway involvement in acute MRI, and the positive rate of ANA/ENA were significantly higher than those in the MOG-ON group and the DN-ON group, and the differences were statistically significant ( P<0.05). The rate of optic disc edema in the MOG-ON group was significantly higher than that in the AQP4-ON group, and the difference was statistically significant ( P=0.031). One and six months after treatment, the BCVA in the MOG-ON group was significantly better than that in the AQP4-ON group and the DN-ON group, and the difference was statistically significant ( P<0.05). The results of binary logistic regression analysis showed that at the onset of the disease, BCVA <0.01 [odds ratio ( OR) =2.60, 95% confidence interval ( CI) 1.23-5.52, P=0.013] and accelerated ESR ( OR=4.68, 95% CI 1.08-20.18, P=0.039) was an independent risk factor affecting the prognosis of BCVA in elderly patients with DON. Conclusions:There are different clinical characteristics between elderly DON patients and young and middle-aged patients. The risk of combined systemic diseases and side effects of glucocorticoids is higher, and the visual prognosis is worse. There are also differences in clinical characteristics and visual prognosis among subgroups of different serological antibodies in elderly DON. Advanced age, the lowest visual acuity at onset and immune inflammatory indicators are all factors affecting the visual prognosis of DON.

Osteosarcoma is a common primary malignant bone tumor with highly aggressive and distal metastasis and poor prognosis. Abnormal metabolism of iron, an essential nutrient with electron-exchange capacity and an important participant in cellular activities, is closely associated with the progression of osteosarcoma. Ferroptosis has been shown to regulate osteosarcoma progression and play an important role in the treatment of osteosarcoma. Exploring the application of relevant molecular mechanisms of ferroptosis in osteosarcoma and the current status of pharmacological intervention may provide new strategies for the treatment of osteosarcoma.

Objective To monitor the susceptibility of clinical isolates to antimicrobial agents in healthcare facilities in major regions of China in 2023.Methods Clinical isolates collected from 73 hospitals across China were tested for antimicrobial susceptibility using a unified protocol based on disc diffusion method or automated testing systems.Results were interpreted using the 2023 Clinical & Laboratory Standards Institute (CLSI) breakpoints.Results A total of 445199 clinical isolates were collected in 2023,of which 29.0％ were gram-positive and 71.0％ were gram-negative.The prevalence of methicillin-resistant strains in Staphylococcus aureus,Staphylococcus epidermidis and other coagulase-negative Staphylococcus species (excluding Staphylococcus pseudintermedius and Staphylococcus schleiferi) (MRSA,MRSE and MRCNS) was 29.6％,81.9％ and 78.5％,respectively.Methicillin-resistant strains showed significantly higher resistance rates to most antimicrobial agents than methicillin-susceptible strains (MSSA,MSSE and MSCNS).Overall,92.9％ of MRSA strains were susceptible to trimethoprim-sulfamethoxazole and 91.4％ of MRSE strains were susceptible to rifampicin.No vancomycin-resistant strains were found.Enterococcus faecalis had significantly lower resistance rates to most antimicrobial agents tested than Enterococcus faecium.A few vancomycin-resistant strains were identified in both E.faecalis and E.faecium.The prevalence of penicillin-susceptible Streptococcus pneumoniae was 93.1％ in the isolates from children and and 95.9％ in the isolates from adults.The resistance rate to carbapenems was lower than 15.0％ for most Enterobacterales species except for Klebsiella,22.5％ and 23.6％ of which were resistant to imipenem and meropenem,respectively .Most Enterobacterales isolates were highly susceptible to tigecycline,colistin and polymyxin B,with resistance rates ranging from 0.6％ to 10.0％.The resistance rate to imipenem and meropenem was 21.9％ and 17.4％ for Pseudomonas aeruginosa,respectively,and 67.5％ and 68.1％ for Acinetobacter baumannii,respectively.Conclusions Increasing resistance to the commonly used antimicrobial agents is still observed in clinical bacterial isolates.However,the prevalence of important crabapenem-resistant organisms such as crabapenem-resistant K.pneumoniae,P.aeruginosa,and A.baumannii showed a slightly decreasing trend.This finding suggests that strengthening bacterial resistance surveillance and multidisciplinary linkage are important for preventing the occurrence and development of bacterial resistance.

Objective:To investigate the expression and prognostic value of ANO1 in oral squamous cell carcinoma(OSCC)tissues.Methods:Immunohistochemistry(IHC,n=163)and Quantitative real-time PCR(qRT-PCR,n=42)were employed to detect the expression level of ANO1 protein and mRNA in OSCC tissues and paracancerous normal tissues.The relationship between ANO1 ex-pression and clinicopathological features(n=163)and prognosis(n=93)of the patients were analyzed,and the results were compared with those in TCGA database.Results:IHC and qRT-PCR confirmed that ANO1 was highly expressed in OSCC(P＜0.05),which was consistent with the results of the TCGA database.Cox regression analysis showed that ANO1 expression was significantly correlated with T stage,lymph node metastasis and TNM stage and poor prognosis(P＜0.05).By Cox regression analysis,ANO1 overexpression(P=0.002)and differentiation degree(P=0.034)were independent prognostic factors.Conclusion:ANO1 is highly expressed in OSCC and is correlated with poor prognosis,which can be used as a novel biomarker for poor prognosis of OSCC patients.

Objective To monitor the susceptibility of clinical isolates to antimicrobial agents in tertiary hospitals in major regions of China in 2022.Methods Clinical isolates from 58 hospitals in China were tested for antimicrobial susceptibility using a unified protocol based on disc diffusion method or automated testing systems.Results were interpreted using the 2022 Clinical &Laboratory Standards Institute(CLSI)breakpoints.Results A total of 318 013 clinical isolates were collected from January 1,2022 to December 31,2022,of which 29.5％were gram-positive and 70.5％were gram-negative.The prevalence of methicillin-resistant strains in Staphylococcus aureus,Staphylococcus epidermidis and other coagulase-negative Staphylococcus species(excluding Staphylococcus pseudintermedius and Staphylococcus schleiferi)was 28.3％,76.7％and 77.9％,respectively.Overall,94.0％of MRSA strains were susceptible to trimethoprim-sulfamethoxazole and 90.8％of MRSE strains were susceptible to rifampicin.No vancomycin-resistant strains were found.Enterococcus faecalis showed significantly lower resistance rates to most antimicrobial agents tested than Enterococcus faecium.A few vancomycin-resistant strains were identified in both E.faecalis and E.faecium.The prevalence of penicillin-susceptible Streptococcus pneumoniae was 94.2％in the isolates from children and 95.7％in the isolates from adults.The resistance rate to carbapenems was lower than 13.1％in most Enterobacterales species except for Klebsiella,21.7％-23.1％of which were resistant to carbapenems.Most Enterobacterales isolates were highly susceptible to tigecycline,colistin and polymyxin B,with resistance rates ranging from 0.1％to 13.3％.The prevalence of meropenem-resistant strains decreased from 23.5％in 2019 to 18.0％in 2022 in Pseudomonas aeruginosa,and decreased from 79.0％in 2019 to 72.5％in 2022 in Acinetobacter baumannii.Conclusions The resistance of clinical isolates to the commonly used antimicrobial agents is still increasing in tertiary hospitals.However,the prevalence of important carbapenem-resistant organisms such as carbapenem-resistant K.pneumoniae,P.aeruginosa,and A.baumannii showed a downward trend in recent years.This finding suggests that the strategy of combining antimicrobial resistance surveillance with multidisciplinary concerted action works well in curbing the spread of resistant bacteria.

Objective To monitor the susceptibility of clinical isolates to antimicrobial agents in healthcare facilities in major regions of China in 2023.Methods Clinical isolates collected from 73 hospitals across China were tested for antimicrobial susceptibility using a unified protocol based on disc diffusion method or automated testing systems.Results were interpreted using the 2023 Clinical & Laboratory Standards Institute (CLSI) breakpoints.Results A total of 445199 clinical isolates were collected in 2023,of which 29.0％ were gram-positive and 71.0％ were gram-negative.The prevalence of methicillin-resistant strains in Staphylococcus aureus,Staphylococcus epidermidis and other coagulase-negative Staphylococcus species (excluding Staphylococcus pseudintermedius and Staphylococcus schleiferi) (MRSA,MRSE and MRCNS) was 29.6％,81.9％ and 78.5％,respectively.Methicillin-resistant strains showed significantly higher resistance rates to most antimicrobial agents than methicillin-susceptible strains (MSSA,MSSE and MSCNS).Overall,92.9％ of MRSA strains were susceptible to trimethoprim-sulfamethoxazole and 91.4％ of MRSE strains were susceptible to rifampicin.No vancomycin-resistant strains were found.Enterococcus faecalis had significantly lower resistance rates to most antimicrobial agents tested than Enterococcus faecium.A few vancomycin-resistant strains were identified in both E.faecalis and E.faecium.The prevalence of penicillin-susceptible Streptococcus pneumoniae was 93.1％ in the isolates from children and and 95.9％ in the isolates from adults.The resistance rate to carbapenems was lower than 15.0％ for most Enterobacterales species except for Klebsiella,22.5％ and 23.6％ of which were resistant to imipenem and meropenem,respectively .Most Enterobacterales isolates were highly susceptible to tigecycline,colistin and polymyxin B,with resistance rates ranging from 0.6％ to 10.0％.The resistance rate to imipenem and meropenem was 21.9％ and 17.4％ for Pseudomonas aeruginosa,respectively,and 67.5％ and 68.1％ for Acinetobacter baumannii,respectively.Conclusions Increasing resistance to the commonly used antimicrobial agents is still observed in clinical bacterial isolates.However,the prevalence of important crabapenem-resistant organisms such as crabapenem-resistant K.pneumoniae,P.aeruginosa,and A.baumannii showed a slightly decreasing trend.This finding suggests that strengthening bacterial resistance surveillance and multidisciplinary linkage are important for preventing the occurrence and development of bacterial resistance.

Objective:To retrieve, evaluate and integrate the best evidence of the operation related to the measurement of intra-abdominal pressure by bladder pressure sensor in adult emergency and critically ill patients.Methods:The "6S" pyramid model was used to retrieve the evidence of internal abdominal pressure measurement at home and abroad, including guidelines, best practices, evidence summary, systematic evaluation, expert consensus and so on. The retrieval time limit was from the establishment of the database to February 12, 2022. Two researchers independently evaluated the quality of the article, extracted data from the included article and graded the evidence according to Joanna Briggs Institute (JBI) evidence pre-grading system (2014 version) .Results:A total of 9 articles were included, including 1 clinical decision, 4 guidelines, 1 expert consensus and 3 quasi-experimental studies. A total of 23 pieces of best evidence were summarized from 10 aspects, including starting time, precautions, patient position, elimination of interference factors, infection control, zero calibration and measurement, data reading, monitoring frequency, equipment management, personnel education and training.Conclusions:This study integrates the best evidence of the operation related to the measurement of intra-abdominal pressure by bladder pressure sensor in adult emergency and critically ill patients, and provides evidence-based basis for standardizing clinical practice and accurately measuring intra-abdominal pressure in adult emergency and critically ill patients.