Objective To assess the efficacy and tolerability of continuous low-dose cyclophosphamide and prednisone regimen(CP)as salvage therapy for multiple myeloma patients with severe complications.Methods The CP regimen consisted of oral cyclophosphamide at 50 mg and oral prednisone at 15 mg daily.The patients were withdrawn if the response was invalid or not improved after 6 months,and follow-up was carried on if CR maintained for 6 weeks.A total of 23 consecutive patients received the CP regimen,with 18 patients having severe complications,and 5 patients unwilling to accept conventional chemotherapy because of severe infection.All patients had received one to four regimens before.Results Among 23 patients with CP regimen,the overall response rate(CR+VGPR+PR)was 61%,with 1 CR,4 VGPR,9 PR,3 MR and 6 PD.The quality of life and physical conditions were improved significandy.Conclusion Our data showed that CP was an effective,well-tolerated,and convenient regimen as salvage therapy for MM with severe complications.

OBJECTIVE:To establish a method for the determination of related substances in Lovastatin tablet. METHODS:HPLC was performed on the column of Waters XTerra? MS C18 with mobile phase A of 0.01%Phosphoric acid solution and B of acetonitrile(gradient elution)at a flow rate 1.0 ml/min,column temperature was 40 ℃,the detection wavelength was 238 nm,and the injection volume was 10 μl. RESULTS:The impurity components were well separated in principal components;the linear range of lovastatin was 17.5-700 μg/ml(r=0.9999);RSDs of precision,stability and reproducibility tests were lower than 1%;recov-ery was 99.30%-100.67%(RSD=0.4%,n=9). CONCLUSIONS:The method is reproducible with good durability and high preci-sion,and can be used for the quality control of Lovastatin tablet.

Objective:To discuss the diagnosis and treatment of urothelial carcinoma of the prostate.Methods:The clinical data of 25 patients with prostate urothelial carcinoma from January 2011 to November 2019 were retrospectively analyzed.Among the 25 patients, the age of onset was 39 to 85 years old, with an average of (63.4±11.2) years old, 13 patient presented with gross hematuria, 9 patients presented with dysuria, and 3 presented with bladder irritation. The PSA of 25 patients was within the normal range (less than 4 ng/ml). 17 cases of pelvic MRI showed abnormal signals in the bladder and prostate area, 3 cases indicated that prostate cancer had invaded the bladder, and 14 cases considered bladder cancer Invasion of the prostate suggests a cauliflower-like abnormal signal in the bladder area. 6 of this 14 patients have a history of bladder cancer. All 25 patients underwent surgical treatment, and 14 underwent transurethral diagnostic resection, of which 6 cases accepted radical cystectomy later. One patient underwent radical cystectomy combined with pelvic lymph node dissection 15 days after the first operation.9 cases received radical cystectomy.2 cases undergoing transurethral palliative resection due to multiple metastases before the operation.Results:The postoperative pathological diagnosis of 25 cases were all prostate urothelial carcinoma, 13 cases were accompanied by bladder urothelial carcinoma, secondary prostate urothelial carcinoma, and 12 cases were primary prostate urothelial carcinoma. After the operation, 13 patients were further treated. Among the patients with secondary prostate urothelial carcinoma, 7 patients received bladder perfusion, 2 patients received GC chemotherapy, 1 patient received local pelvic radiotherapy.25 patients were followed up for 2 to 36 months with an average of (21.5±10.1) months. Among them, lymph node metastasis were seen in 17/25 patients. lymph node metastasis were found in 7/25 before surgery, and 1/25 found lymph node metastasis during surgery. Among the patients with distant metastases afterwards, multiple metastases throughout the body (4/14), lung metastases only (6/14), and bone metastases only (4/14), the 1-year survival rate was 88% (22/25), the 2-year survival rate was 40% (10/25), and the 3-year survival rate was 28% (7/25).Conclusions:The diagnosis depends on histopathological examination. Early diagnosis may help improve prognosis. The first choice is a comprehensive treatment based on radical surgery.

Objective: To establish a GC determination method for the content and dissolution of magnesium valproate tablets. Methods:Magnesium valproate tablets were detected by a GC internal standard method. The samples were dissolved in 0. 1 mol·L-1 hydrochloric acid solution, and then extracted by dichloromethane. Eicosane was used as the internal standard. The dissolution was de-termined by the first method described in ChP 2015 edition. The dissolution medium was 0. 1 mol·L-1 hydrochloric acid solution and the rotation speed was 100 r·min-1 with the sampling time at 45 min. The samples were extracted by dichiormethane, and eicosane was used as the internal standard as well. Results: The dissolution of magnesium valproate tablets showed good linearity within the range of 0. 005-1. 000 mg·ml-1(r=0. 9999). The recovery was 99. 2% (RSD=0. 5%, n=9). The dissolution curve showed that magnesium valproate released above 80% in 45 minutes. Conclusion:The method has good specificity and high accuracy, and can be used for the content determination and dissolution detection of magnesium valproate tablets.

Objective:To explore the clinicopathological characteristics and prognostic factors of bladder squamous cell carcinoma (SqCC)and bladder adenocarcinoma.Methods:A retrospective analysis of the clinical data of 107 patients with nonurothelial carcinoma of the bladder admitted to the First Affiliated Hospital of Zhengzhou University from October 2011 to January 2019 was performed. Among the 107 patients, 78 were males and 29 were females(ratio 2.69∶1), and the median age of onset was 62.0 years. According to histological types, patients were divided into SqCC group, urachal adenocarcinoma group and non-urachal adenocarcinoma group. There were 55 cases in the SqCC group, including 40 males and 15 females. Their mean age was 69.0(58.0, 75.0) years. 14 cases had the history of smoking. The clinic manifestation included hematuria in 35 cases, bladder irritation in 13 cases, dysuria in 2 cases and pain in 5 cases .Tumors located at the anterior and posterior walls in 18 cases, at the lateral wall in 27 cases, at the triangular area in 8 cases and at the apical wall in 2 cases. The average diameter of tumor was 4.5(3.0, 6.0) cm. 37 cases suffered with single tumor and 18 cases suffered with multiple tumors. The surgical method was radical cystectomy in 38 cases, partial cystectomy in 4 cases, TURBT in 9 cases, interventional surgery in 2 cases, and no operation in 2 cases. There were 20 cases in the urachal adenocarcinoma group, including 14 males and 6 females; age 53.5(43.5, 57.8) years; 6 cases with a history of smoking. The clinic manifestation included hematuria in 16 cases, bladder irritation in 1 case, pain in 2 cases and asymptomatic in 1 case. Tumors located at anterior and posterior walls in 4 cases and at apical wall in 16. The average diameter of tumor was 3.0(2.0, 4.8) cm. Single tumor was present in 18 cases, multiple tumors were present in 2 cases. The surgical method was partial cystectomy in 16 cases, radical cystectomy in 1 case, TURBT in 1 case and no operation in 2 cases. There were 32 cases in the non-urachal adenocarcinoma group, including 24 males and 8 females. Their mean age was 55.0(46.3, 70.8) years.11 cases had a history of smoking. The clinic manifestation included hematuria in 16 cases, bladder irritation in 3 cases, dysuria in one case and pain in 7 cases. Tumor located at anterior and posterior walls in 17 cases, at lateral wall in 7 cases, at triangular area in 5 cases and at apical wall in 3 cases. The average diameter of tumor was 3.6(2.0, 4.5) cm. 23 cases suffered with single tumor, 9 cases suffered with multiple tumors.The surgical method was radical cystectomy in 11 cases, partial cystectomy in 9 cases, TURBT in 9 cases , and no operation in 3 cases. The preoperative data of the three groups of tissue types were compared, the differences of age of onset, tumor diameter, tumor location, reason for treatment, operation method ( P<0.05)among the 3 groups were statistically significant. The clinicopathological characteristics and prognosis of the 3 groups of tissue types were compared, and the Cox proportional regression risk model was used to analyze the clinical factors affecting the prognosis. Results:91 patients were followed up, the overall follow-up rate was 85.1%, the median follow-up time was 26(7, 48) months. The 3-year and 5-year overall survival rates were 54.1% and 42.2%, respectively. In the SqCC group, 11 cases received chemotherapy; 3 cases received postoperative radiotherapy; 12 cases received postoperative perfusion.10 cases had recurrence; 17 cases had lymph node metastasis; 19 cases had distant metastasis; 5 cases were pT x in pT stage, 36 cases were pT 1-pT 2, 14 cases were pT 3-pT 4. 19 cases had unknown tumor differentiation, 4 cases had well differentiated, 24 cases had moderately differentiated and 8 cases had poorly differentiated. In the urachal adenocarcinoma group, 7 cases received chemotherapy, 3 cases had recurrence, 2 cases had lymph node metastasis, 2 cases had distant metastasis; 1 case was pT x in pT stage, 16 cases were pT 1-pT 2, 3 cases were pT 3-pT 4. 9 cases had unknown tumor differentiation, 3 cases had well differentiated, and 5 cases had moderately differentiated, 3 cases had poorly differentiated. In the urachal adenocarcinoma group, 3 cases received chemotherapy, 1 case received postradiotherapy, 11 cases received postoperative perfusion; 10 cases had recurrence. 5 cases had lymph node metastasis, 4 cases had distant metastasis, 6 cases were pT x, 21 cases were pT 1-pT 2 and 5 cases were pT 3-pT 4. 14 cases had unknown tumor differentiation, 8 cases had moderately differentiated and 10 cases had poorly differentiated.The postoperative general data of the three groups of tissue types were compared. There was statistically significant difference between whether there was postoperative perfusion and whether there was distant metastasis (all P<0.05). The univariate analysis results showed gender, age, surgical method, lymph node metastasis, distant metastasis, pT staging, tumor differentiation and histological type were risk factors that affect the prognosis(all P<0.05). Cox multivariate analysis showed that women ( HR=2.604, P=0.032) and distant metastases ( HR=2.571, P=0.026) were independent risk factors affecting the prognosis of patients. Conclusions:SqCC and adenocarcinoma are clinically rare and have poor prognosis. They often present with hematuria. Surgical treatment is the first choice. Radical cystectomy is the first choice for SqCC and non-urachal adenocarcinoma, and extended partial cystectomy is the first choice for urachal adenocarcinoma. Female and distant metastasis are independent risk factors affecting the prognosis of patients.

BACKGROUND:Establishing a nomogram prediction model for postoperative pulmonary infection in hip fractures and taking early intervention measures is crucial for improving patients'quality of life and reducing medical costs. OBJECTIVE:To construct a nomogram risk prediction model of postoperative pulmonary infection in elderly patients with hip fracture,and provide theoretical basis for feasible prevention and early intervention. METHODS:Case data of 305 elderly patients with hip fractures who underwent surgical treatment at Wuxi Traditional Chinese Medicine Hospital Affiliated to Nanjing University of Chinese Medicine between January and October 2020(training set)were retrospectively analyzed.Using univariate and multivariate logistic regression analysis and Hosmer-Lemeshow goodness of fit test,receiver operating characteristic curve was utilized to analyze the diagnostic predictive efficacy of independent risk factors and joint models for postoperative pulmonary infections.Tools glmnet,pROC,and rms in R Studio software were applied to construct a nomogram model for predicting the risk of postoperative pulmonary infection in elderly patients with hip fractures,and calibration curves were further drawn to verify the predictive ability of the nomogram model.Receiver operating characteristic curves,calibration curves,and decision curves were analyzed for 133 elderly patients with hip fractures(validation set)receiving surgery at the same hospital from November 2022 to March 2023 to further predict the predictive ability of the nomogram model. RESULTS AND CONCLUSION:(1)The postoperative pulmonary infection rate in elderly patients with hip fractures in this group was 9.18%(28/305).(2)Single factor and multivariate analysis,as well as forest plots,showed that preoperative hospitalization days,leukocyte count,hypersensitive C-reactive protein,and serum sodium levels were independent risk factors(P<0.05).The Hosmer-Lemeshow goodness of fit test showed good fit(χ2=4.57,P=0.803).Receiver operating characteristic curve analysis was conducted on the independent risk factors and their joint models mentioned above,and the differentiation of each independent risk factor and joint model was good,with statistical significance(P<0.05).(3)The graphical calibration method,C-index,and decision curve were used to validate the nomogram prediction model.The predicted calibration curve was located between the standard curve and the acceptable line,and the predicted risk of the nomogram model was consistent with the actual risk.(4)The validation set used receiver operating characteristic curve,graphic calibration method,and decision curve to validate the prediction model.The results showed good consistency with clinical practice,indicating that the model had a good fit.The nomogram risk prediction model constructed for postoperative pulmonary infection in elderly patients with hip fractures has good predictive performance.The use of the nomogram risk prediction model can screen high-risk populations and provide a theoretical basis for early intervention.

Objective:To investigate the status of We-Media platforms opened and opera-ted by surgeons in tertiary first-class hospitals nationwide and analyze its influence on patients and surgeons.Methods:The retrospective cross-sectional investigation study was conducted. The investigation was conducted on the surgeons who had opened We-Media platforms in their units or associations through the contact of all members of the second Elite Committee of Chinese Digestive Surgery of the Chinese Journal of Digestive Surgery from November 5 to 30, 2021. Questionnaires were distributed through wechat, and the software platform was Questionnaire Star. Observation indicators: (1) results of questionnaire survey; (2) basic information of surgeons running We-Media platforms; (3) daily workload and research background of surgeons running We-Media platforms; (4) information related to We-Media platforms; (5) influence of running We-Media platforms on patients; (6) influence of running We-Media platforms on surgeons; (7) feelings and suggestion of surgeons after running We-Media platforms. Measurement data with normal distribution were expressed as Mean± SD, and count data were expressed as absolute numbers and percentages. Results:(1) Results of questionnaire survey: a total of 229 complete and valid questionnaires were collected in this survey. (2) Basic information of surgeons running We-Media platforms: of 229 surgeons, there were 195 males and 34 females, aged (40±8)years. There were 120 surgeons aged from 36-45 years, 80 surgeons aged <35 years and 29 surgeons aged >45 years. There were 86.46% (198/229) of surgeons from teaching hospitals and 74.67%(171/229) of surgeons from provincial cities. Of 229 surgeons, junior, intermediate, deputy senior and senior titles accounted for 17.90%(41/229), 27.51%(63/229), 37.12%(85/229) and 17.47%(40/229), respectively. Surgeons with working years ≤5 years, 6-10 years, 11-15 years and ≥16 years accounted for 19.21%(44/229), 22.27%(51/229), 26.64%(61/229) and 31.88%(73/229), respectively. Hepatobiliary and pancreatic surgeons, esophageal and gastrointestinal surgeons were the main specialties, accounting for 48.03%(110/229) and 14.41%(33/229), respectively. The original intentions of opening We-Media platforms (multiple choice) included increasing patient population and improving the income, accumulating cases to facilitate clinical research projects, increasing the popularity of the industry and gain peer recognition, increasing social awareness and improving spiritual satisfaction, passive assignments form units or hospitals, which accounted for 52.84% (121/229), 54.15%(124/229), 64.19%(147/229), 58.08%(133/229), 17.90%(41/229), respectively. (3) Daily workload and research background of surgeons running We-Media platforms: 60.26%(138/229) of surgeons participated in offline social welfare activities 1-3 times per year and 26.64%(61/229) of surgeons participated >3 times per year. There were 47.60% (109/229) of surgeons performing 5-10 operations per week and 33.19%(76/229) of surgeons performing >10 operations per week. In terms of scientific researches, 38.43%(88/229) of surgeons had not published high-quality English articles as the first author or co-first author, 24.89%(57/229) of surgeons had published 1-3 articles and 36.68%(84/229) of surgeons had published >3 articles. There were 51.09%(117/229) of surgeons without any longitu-dinal projects, 13.54%(31/229) of surgeons with national projects, 35.37%(81/229) of surgeons with provincial and ministerial projects. (4) Information related to We-Media platforms: there were 65.50%(150/229) of surgeons running wechat public account, 55.02%(126/229) of surgeons running consultation platform, 31.44%(72/229) of surgeons running TikTok, 21.40%(49/229) of surgeons running wechat video account (some surgeons operated multiple We-Media platforms). The time of operating the platform was <1 year in 35.81%(82/229) of surgeons, 1-3 years in 42.79%(98/229) of surgeons, >3 years in 21.40%(49/229) of surgeons, respectively. The contents of We-Media platforms were updated >2 weeks in 45.85%(105/229) of surgeons. There were 63.32%(145/229) of surgeons with We-Media platforms win-ning emotional support from their department or hospital, 12.66%(29/229) of surgeons with We-Media platforms winning financial support. There were 82.53%(189/229) of surgeons operating We-Media platforms by theirselves. The We-Media plat-form operation was smooth in 47.16%(108/229) of surgeons, unsustainable in 50.22%(115/229) of surgeons and suspended in 2.62%(6/229) of surgeons. On average, it took less than 30 minutes for 60.70%(139/229) of surgeons and 30-60 minutes for 27.07%(62/229) of surgeons to operate the We-Media platforms of surgeons every times, respec-tively. The background message or consulta-tion was allowed in 89.08%(204/229) of surgeons. The number of leaving messages was <5 times in 52.84%(121/229) of surgeons and >50 times in 6.99%(16/229) of surgeons. On average, each content in 59.39%(136/229) of surgeons were "liked" or "viewed" <100 times, and each content in 29.26%(67/229) of surgeons were "liked" or "viewed" 100-300 times. There were 60.26%(138/229) of surgeons having content with the highest "liked" or "viewed" clicks <1 000 times and 6.99%(16/229) of surgeons having content with the highest "liked" or "viewed" clicks >10 million times. On average, each content in 74.67%(171/229) of surgeons were "forwarded" <100 times, and each content in 6.55%(15/229) of surgeons were "forwarded" >300 times, respectively. The number of followers was <1 million in 87.34%(200/229) of surgeons. The We-Media audiences (multiple choices) included related professional peers, related health care professionals, patients of surgeons, general public, accounting for 42.36%(97/229), 31.00%(71/229), 52.40%(120/229), 53.71%(123/229), respectively. (5) Influence of running We-Media platforms on patients: 34.93%(80/229) of surgeons believed that the operation of We-Media platform significantly increased the number of outpatient and inpatient patients of themselves, 29.69%(68/229) of surgeons believed that the operation of We-Media platform significantly increased the number of outpatient and inpatient patients in their departments, respectively. In the view of 75.98%(174/229) of surgeons, the percent of outpatient and inpatient patients by We-Media platforms was <10%. After 6 months of We-Media operation, 39.74%(91/229) and 25.33%(58/229) of surgeons believed that inpatient and outpatient compliance was significantly improved, respectively, and 46.29% (106/229) of surgeons believed that preopera-tive and pre-chemotherapy or pre-radiotherapy conversations saved more time. (6) Influence of running We-Media platforms on surgeons: 20.09%(46/229) and 6.55%(15/229) of surgeons attributed the success to "long-term, sustainable, absorbed operation" and "important contents of We-Media platforms and wide audiences". There were 72.49%(166/229) of surgeons yet to be successful. There were 26.64% (61/229) and 22.27%(51/229) of surgeons believing that opening We-Media platforms was conducive to the association's employment and multicenter clinical research. Operating We-Media platforms was conducive to professional knowledge improvement, clinical research ability enhancement and teaching level of students, which was believed by 54.59%(125/229), 40.17%(92/229) and 48.91%(112/229) of surgeons, respectively. Although the total income in 88.65%(203/229) of surgeons increased less than 20% after 6 months of operation, 47.60%(109/229) of surgeons believed that "the sense of achievement or pleasure in work has been significantly improved", and 48.91%(112/229) of surgeons did not have the idea of quitting. There were 7.42%(17/229) of surgeons with the idea of quitting the operation of We-Media platforms. (7) Feelings and suggestions of surgeons after running We-Media platforms: the proportion of surgeons who hoped to get help from departments, hospitals, associations and the society were 61.57%(141/229), 72.05%(165/229), 47.16%(108/229) and 53.28%(122/229), respectively. Only 9.61%(22/229) of surgeons did not require help. Commercial advertisement was allowed by 40.17%(92/229) of surgeons and forbidden by 59.83%(137/229) of surgeons. In terms of alternative suggestion, 70.74%(162/229) of surgeons believed that it was necessary for the We-Media platforms to involve more doctors of different specialties, but 40.61%(93/229) of surgeons believed that relevant departments or associations should strengthen supervision under the current situation. In addition, 32.75%(75/229) of surgeons believed that the operation of We-Media platform requires more investment. The were 27.95%(64/229) of surgeons giving specific suggestions on running We-Media platforms, 7.81%(5/64) of which did not suggest a blind try.Conclusions:Most surgeons who open and operate We-Media platforms in China are faced with problems such as busy work, limited time and energy, low-income increase, and lack of professional promotion and maintenance teams and external support. Even so, there are still many surgeons who have achieved success through long-term persistence and high-quality content output, thus increasing the number of patient visits, improving their own ability and industry influence, and bringing a greater sense of professional achievement.

Objective:To analyze the cardio-pulmonary ultrasound features of cardiogenic pulmonary edema (CPE) and pneumonia in adults with acute dyspnea, and to construct a differential diagnosis model.Methods:Seven hundred and forty-three patients with sudden acute dyspnea admitted to Hebei General Hospital from November 2018 to May 2022 were retropectively included. Ultrasonographer A performed lung ultrasound with 12 zone method, and interpreted and recorded the ultrasonic signs (including A-lines area, B-lines area, consolidation area and pleural effusion area) together with ultrasonographer B. According to the ultrasonic characteristics of the whole lung, it was divided into A-profile and B-profile. According to the continuity and symmetry of the distribution of B-lines in bilateral lung fields, it could be divided into bilateral lung continuous and discontinuous B-profile, bilateral lung symmetric and asymmetric B-profile. Left ventricular ejection fraction (LVEF), left ventricular filling pressure (E/e′), right ventricular dilatation, tricuspid annular systolic displacement (TAPSE) and inferior vena cava diameter (IVCD) were evaluated by echocardiography, and all the indexes were transformed into binary variables. According to the final clinical diagnosis and treatment results, the disease was divided into CPE group and pneumonia group. Binary Logistic regression model was used to screen independent influencing factors, and partial regression coefficient β value was used as a weight to assign a score, and a differential diagnosis model was established based on the total score. The predictive value of the model was evaluated by the receiver operating characteristic curve (ROC) and area under curve (AUC). After the model was built, 30 patients with CPE or pneumonia were independently collected by ultrasonographer C as external validation data, which were included in the model to draw ROC curve and evaluate the differential diagnosis efficiency of the model. The consistencies between ultrasonographer A and B, A and C in observing lung ultrasound were explored.Results:A total of 743 patients from 43 clinical departments were included, including 246 cases in CPE group and 497 cases in pneumonia group. Multivariate logistic regression analysis showed that bilateral lung continuous B-profile, bilateral lung symmetric B-profile, ≥1 pleural effusion area, LVEF<50%, E/e′>14 were the risk factors for CPE (all OR>1, P<0.05), and ≥1 consolidation area and ≥1 pleural sliding disappearance area were the protective factors for CPE (all OR>1, P<0.05). The sensitivity, specificity and AUC of combined cardio-pulmonary ultrasound index β value weight score in the differential diagnosis of CPE and pneumonia were 0.939, 0.956 and 0.986, respectively. The AUC of external validation data was 0.904. Ultrasonographer A and B, A and C had good consistency in the interpretation of lung ultrasound signs ( P<0.05). Conclusions:The differential diagnosis model based on combined cardio-pulmonary ultrasound indexes has high differential diagnosis efficiency for CPE and pneumonia, and can be used in bedside cardio-pulmonary ultrasound practice.

Objective:To construct and evaluate a screening and diagnostic system based on color fundus images and artificial intelligence (AI)-assisted screening for optic neuritis (ON) and non-arteritic anterior ischemic optic neuropathy (NAION).Methods:A diagnostic test study. From 2016 to 2020, 178 cases 267 eyes of NAION patients (NAION group) and 204 cases 346 eyes of ON patients (ON group) were examined and diagnosed in Zhongshan Ophthalmic Center of Sun Yat-sen University; 513 healthy individuals of 1 160 eyes (the normal control group) with normal fundus by visual acuity, intraocular pressure and optical coherence tomography examination were collected from 2018 to 2020. All 2 909 color fundus images were as the data set of the screening and diagnosis system, including 730, 805, and 1 374 images for the NAION group, ON group, and normal control group, respectively. The correctly labeled color fundus images were used as input data, and the EfficientNet-B0 algorithm was selected for model training and validation. Finally, three systems for screening abnormal optic discs, ON, and NAION were constructed. The subject operating characteristic (ROC) curve, area under the ROC (AUC), accuracy, sensitivity, specificity, and heat map were used as indicators of diagnostic efficacy.Results:In the test data set, the AUC for diagnosing the presence of an abnormal optic disc, the presence of ON, and the presence of NAION were 0.967 [95% confidence interval ( CI) 0.947-0.980], 0.964 (95% CI 0.938-0.979), and 0.979 (95% CI 0.958-0.989), respectively. The activation area of the systems were mainly located in the optic disc area in the decision-making process. Conclusion:Abnormal optic disc, ON and NAION, and screening diagnostic systems based on color fundus images have shown accurate and efficient diagnostic performance.

BACKGROUND:The alteration of miR-146a-3p level is a common event in the pathogenesis of most neurological diseases,and the specific mechanism of miR-146a-3p regulation of astrocytes has not been studied. OBJECTIVE:To verify that miR-146a-3p regulates astrocyte proliferation,migration and apoptosis through insulin-like growth factor 1. METHODS:12 SD rats were divided into a sham operation group and a spinal cord injury group,with six rats in each group.RNA sequencing analysis was performed on the spinal cord tissues of all groups 2 weeks after surgery to screen out the differential genes(log2FC>2),and to select spinal cord injury-related genes(Score>20)in the Genecards database,and then to predict the target genes of miR-146a-3p by Targetscan.The intersection of three gene sets was obtained to screen out insulin-like growth factor 1 as one of the important target genes.qPCR,western blot assay and immunohistochemistry were performed to analyze the expression level of insulin-like growth factor 1 in spinal cord tissues.The primary astrocytes were divided into NC group,NC-mimics group and miR-146a-3p mimics group.Annexin-V/PI staining was used to detect cell apoptosis.CCK-8 assay was used to detect cell proliferation.Transwell assay was used to detect cell migration ability. RESULTS AND CONCLUSION:The expression of miR-146a-3p in the spinal cord tissue of the spinal cord injury group was lower than that of the sham operation group(P<0.05).The expression of insulin-like growth factor 1 in the spinal cord tissue of the spinal cord injury group was higher than that of the sham operation group(P<0.05).Compared with the NC group and NC-mimics group,the apoptotic rate of astrocytes was increased(P<0.01);the proliferation of astrocytes was decreased(P<0.01)and the number of migration was decreased(P<0.01)in the miR-146a-3p mimics group.To conclude,the expression of miR-146a-3p decreased and the expression of insulin-like growth factor 1 increased in spinal cord tissue after spinal cord injury.miR-146a-3p targeted regulation of insulin-like growth factor 1 in astrocytes,inhibited the proliferation and migration of astrocytes and promoted their apoptosis.