Objective: To investigate whether fibroblast growth factor 18(FGF18) can induce human gingival fibroblasts(HGFs) isolatedin vitroto differentiate into osteoblast-like cells, and to explore the mechanism of osteogenesis. Methods : HGFs were isolated, cultured and identified by tissue block method. The third generation of HGFs were divided into experimental group and control group. FGF18 and L-DMEM was added to the experimental group while L-DMEM was added to the control group.The effects of different concentrations of FGF18(0, 0.01, 0.02, 0.04, 0.06 mg/L) on proliferation of HGFs were detected by Methylthiazolyldiphenyl-tetrazolium bromide(MTT) assay. Alkaline phosphatase(ALP) and alizarin red staining were used to detect the osteogenesis and mineralization ability of the cells after induction. RT-PCR, immunocytochemistry staining, and Western blot were used to detect the expression of genes and proteins related to osteogenesis and BMP2 in the BMP signaling pathway. Results: Compared with the control group, the experimental group could promote the proliferation of HGFs at 3, 5, 7, 9, and 11days(P<0.05),ALP activity and mineral salt deposition increased after induction at 14 and 21 days(P<0.05), and the expressions of ALP, OPN, OCN mRNA and BMP2 mRNA in BMP signaling pathway significantly increased(P<0.01). The expressions of OPN, OCN and BMP2 protein at 21 days were significantly higher than those at 14 days(P<0.01). Conclusion FGF18 can promote the proliferation of HGFs, and induce the differentiation of HGFs into functional osteoblasts. The osteogenic mechanism is related to the upregulation of BMP2.

Objective To establish a novel real-time quality control method for rapidly identifying the random error of sodium ion con-centration in serum using an artificial intelligence voting algorithm,and evaluate the relevant effectiveness of the model established on this basis.Methods A total of 144 754 test results of serum sodium ion rom the inpatients measured by Beckman AU5400 biochemis-try analyzer from January to May 2021 were obtained retrospectively from laboratory information system of the Department of Clinical La-boratory,Nanjing Drum Tower Hospital,and all the data were used as unbiased data for the current study.The random errors were arti-ficially introduced to generate the corresponding biased data set.Subsequently,the voting algorithm-based internal quality control model(ViQC)was established using the principles of the voting algorithm.The ViQC model and five classical PBRTQC(patient-based real-time quality control)algorithms were performed direct to each biased data.The analytical performance of the ViQC model was evaluated by using classification model criteria.The trimmed average number of patient samples until error detection(tANPed)was used to com-pare the clinical detection efficacy of the ViQC model with those of the five classical algorithms,and the error detection curves were plotted.Results Compare with all the classical algorithms,the ViQC model showed a false positive rate below 0.002 and achieved ac-curacy above 0.951 in detecting all the deviations.When the error factors were 1.5,2.5,and 3.0,the false positive rate of the ViQC model was zero.When the error factor was 2.5,its accuracy reached 0.979.Compared to the five classical PBRTQC algorithms,the ViQC model reduced the overall average tANPed by up to 34％and showed higher sensitivity for error detection.In addition,the ViQC model demonstrated the area under the ROC curve was as high as 0.989 at TEa on the test set,but the value of tANPed wasonly five.Conclusion We successfully established a real-time quality control model for the data of patients based on artificial intelligence algo-rithms,and its efficacy of clinical detection was superior to the traditional PBRTQC algorithms.

OBJECTIVES: This study aims to investigate the effects of tumor-stromal fibroblasts (TSFs) on the proliferation, invasion, and migration of salivary gland pleomorphic adenoma (SPA) cells in vitro. METHODS: Salivary gland pleomorphic adenoma cells (SPACs), TSFs, and peri-tumorous normal fibroblasts (NFs) were obtained by tissue primary culture and identified by immunocytochemical staining. The conditioned medium was obtained from TSF and NF in logarithmic phase. SPACs were cultured by conditioned medium and treated by TSF (group TSF-SPAC) and NF (group NF-SPAC). SPACs were used as the control group. The proliferation, invasion, and migration of the three groups of cells were detected by MTT, transwell, and scratch assays, respectively. The expression of vascular endothelial growth factor (VEGF) in the three groups was tested by enzyme linked immunosorbent assay (ELISA). RESULTS: Immunocytochemical staining showed positive vimentin expression in NF and TSF. Results also indicated the weak positive expression of α-smooth muscle actin (SMA) and fibroblast activation protein (FAP) in TSFs and the negative expression of α-SMA and FAP in NFs. MTT assay showed that cell proliferation in the TSF-SPAC group was significantly different from that in the NF-SPAC and SPAC groups (P<0.05). Cell proliferation was not different between the NF-SPAC and SPAC groups (P>0.05). Transwell and scratch assays showed no difference in cell invasion and migration among the groups (P>0.05). ELISA showed that no significant difference in VEGF expression among the three groups (P>0.05). CONCLUSIONS TSFs may be involved in SPA biological behavior by promoting the proliferation of SPACs but has no effect on the invasion and migration of SPACs in vitro. Hence, TSF may be a new therapeutic target in SPA treatment.
Humans ; Adenoma, Pleomorphic/metabolism* ; Vascular Endothelial Growth Factor A ; Culture Media, Conditioned/metabolism* ; Fibroblasts/metabolism* ; Salivary Glands/metabolism*

ObjectiveTo explore the mental health status and its influencing factors among middle school students in Xide County， Liangshan Yi Autonomous Prefecture， and to provide references for mental health interventions for local middle school students. MethodsUsing a cross-sectional study design， one junior middle school and one senior middle school in Xide County， Liangshan Prefecture， Sichuan Province， were randomly selected on September 16， 2021， and two classes per grade in each school involving 288 students were recruited. Subjects were assessed using Patients' Health Questionnaire Depression Scale-9 item （PHQ-9）， Generalized Anxiety Disorder Scale-7 item （GAD-7）， PTSD Checklist for DSM-5 （PCL-5）， Multidimensional Scale of Perceived Social Support （MSPSS） and UCLA Loneliness Scale （ULS-3）. Then the scores of above scales were compared among middle school students with different demographic characteristics， and binary Logistic regression analysis was conducted to screen the influencing factors of post-traumatic stress disorder (PTSD） symptoms. ResultsAmong the respondents， 17.71% （95% CI： 0.133~0.221）， 8.68% （95% CI： 0.054~0.120）， 2.78% （95% CI： 0.009~0.047） and 45.83% （95% CI： 0.400~0.516） were reported to have symptoms of depression， anxiety， PTSD and loneliness， respectively. Students in senior middle school scored lower on PCL-5 and ULS-3 than those in junior middle school ［（6.46±8.91） vs. （8.87±9.42）， t=2.202， P<0.05； （4.67±1.65） vs. （5.60±1.88）， t=4.431， P<0.01］. Regression analysis denoted that depressive symptoms （OR=7.630， P<0.05） and anxiety symptoms （OR=3.789， P<0.01） were risk factors for PTSD symptoms among middle school students. ConclusionThe middle school students in Xide County， Liangshan Yi Autonomous Prefecture suffer a high prevalence rate of depressive symptoms and loneliness， and those in junior middle school are more likely to feel a sense of strong loneliness， furthermore， depressive symptoms and anxiety symptoms are risk factors for PTSD symptoms.

Objective To explore the epidemiological characteristics of pulmonary infection in elderly patients with chronic obstructive pulmonary disease (COPD), and to construct a risk prediction model. Methods Among of 125 elderly patients with COPD from May 2020 to June 2022 were selected as the research subjects. The epidemiological characteristics of infected patients were counted, and the risk factors of pulmonary infection in patients were analyzed and a prediction model was constructed. Results A total of the 125 elderly patients with COPD, there were 46 cases of pulmonary infection, with the infection rate of 36.80%. The detection rate of Gram-negative bacteria was higher than that of Gram-positive bacteria or fungi (64.44% vs 33.33% or 2.22%, P<0.05). Smoking history, presence of diabetes mellitus, mechanical ventilation, irrational use of antibiotics, and hypoalbuminemia were risk factors for pulmonary infection in elderly patients with COPD (P<0.05). Prediction model of pulmonary infection in elderly patients with COPD obtained by multivariate logistic regression analysis was shown as PI=-1.981+0.657×smoking history+0.806×presence of diabetes mellitus+0.521×mechanical ventilation+0.639×irrational use of antibiotics+0.715×presence of hypoalbuminemia. Hosmer-Lemeshow test showed that Hosmer-Lemeshow χ²=0.812 and P=0.295. ROC curve analysis revealed that the AUC value of the prediction model on predicting the pulmonary infection in elderly patients with COPD was 0.802. Conclusion The pathogenic bacteria of elderly patients with COPD complicated with pulmonary infection are mainly Gram-negative bacteria. The prediction model constructed according to the risk factors of pulmonary infection in patients has predictive value on pulmonary infection in patients.

Objective:To describe the differences in body mass index (BMI) distribution in adult twins registered in Chinese National Twin Registry (CNTR), and provide evidence for the risk factor analysis and prevention and control of overweight or obesity.Methods:A total of 32 725 twin pairs aged 18 years and above who completed the questionnaire survey during 2010-2018 and had complete registered information in CNTR and normal body weight and length were included in the analysis on the population and region specific distributions of BMI of twin pairs and the difference in BMI in twin pairs.Results:The twin pairs included in the analysis were aged (34.6±12.4) years, the twin pairs of same gender accounted for 79.7%. The average BMI was 22.5 kg/m 2. The overall prevalence of obesity and overweight was 4.9% and 23.7%, respectively. Participants who were men, 50-59 years old, married, had lower education level, and lived in northern China had higher overweight rate and obesity rate ( P<0.001). The difference in overweight or obesity prevalence between monozygotic (MZ) twin pars and dizygotic (DZ) twin pairs was not significant, but firstborn twin pairs had slightly higher rates of overweight and obesity than later-born twin pairs ( P<0.05). The analysis in same gender-twin pairs indicated that the difference in BMI was associated with age (trend test: P<0.001), and the difference was more obvious in DZ twin pair in MZ pair and this difference increased with age. The concordant rate of BMI was higher in MZ twin pairs than DZ twin pairs ( P<0.05). Conclusion:The distribution of BMI of twin pairs varied with population and region and BMI varied with age due to its genetic nature.

Objective To investigate the CT and MRI findings of Coats’disease in comparison with pathology.Methods CT,MRI and ultrasonic features,FFA findings of eight patients of Coats’disease with histo-pathologically confirmed were analyzed retrospectively.CT scanning,routine MRI scanning and ultrasonic examination were performed in all eight patients.Results Unilateral eyeball was involved in all eight cases.On CT scanning,the density of the vitreous body was increased homogeneously which boundary was clear(n=8).The retina was thick(n=8).The anterior chamber depth was shallow(n=5).Multiple calcified foci occured in lens and vitreous body(n=1).The volume of affected eyeball increased(n=1).The affected eyeball shrinked(n=1).The difference of volume of bilateral eyeball was not obvious(n=6). Lens were thick and dislocation(n=5).On MRI scanning,the lesions in the vitreous body showed iso T1 and iso T2 signal (n=6),short T1 and long T2 signal(n=1),long T1 and long T2 signal(n=1).The retina showed short T2 signal(n=3).The vitreous body was filled with lesions(n=5).The lesions looked like‘V’sticked to retina(n= 3).On ultrasonic examination low echo was showed in the vitreous body(n=6),the ball wall bulged(n=8),retinal detachment(n=8).The echo of the ball wall was obviously enhanced,which indica-ted ossification(n=1).Strong echo calcified plaque was showed in one case.FFA showed retinal telangiectasia(n=8),retinal capillary zone(n=2),mutiple chestnut shaped aneurysms(n= 6),retinal neovascularization(n= 1 ).Pathological examination showed retinal telangiectasia with foam macrophages and lipid deposition.Conclusion Coats’disease carries some typical CT and MRI features.To summarize the radiologic features,the findings of FFA and ultrasonic inspection are helpful to diagnosis.

Objective To investigate the species diversity and distribution of medical mollusca in Shanghai City. Methods From August 2012 to October 2013,all kinds of habitats in 8 districts and counties in Shanghai City,namely Jiading,Qingpu, Baoshan,Minhang,Songjiang,Jinshan,Chongming,Pudong,were selected for the field survey according to the distribution characteristics of the river system,and all the specimens of medical mollusca in the investigation sites were collected and classi?fied by morphological identification. Meanwhile,the species composition,habitats as well as the fauna of the medical mollusca collected were analyzed. Results A total of 5 211 specimens were collected,which belonged to 2 classes,14 families,18 gen?era and 25 species,including Oncomelania hupensis hupensis,Pomacea canaliculata,Parafossarulus striatulus,Alocinma longicornis,Physa acuta,Galba pervia,Hippeutis cantori,etc. The species numbers of medical mollusca in Chongming,Jin?shan,Pudong new area and Qingpu districts(counties)were 22,22,21 and 20,respectively,which were more than those of other areas. The habitat analysis suggested that the species numbers in the river and wetland were the most,both of which were 14 species. The main faunas of the medical mollusca in Shanghai were the cosmopolitan and oriental species. Conclusions The freshwater gastropod species are paucity in Shanghai City,but almost of them can be served as the intermediate hosts of certain parasites to transmit snail?related parasitic diseases,so the surveillance of medical mollusca should be strengthened.

Objective To compare the diversity of mitochondrial genomes of Angiostrongylus cantonensis in the mainland of China. Methods According to the population genetic of A. cantonensis,seven female worms were selected to characterize the mi-tochondrial(MT)genomes. Twelve primer pairs based on known MT genome(GQ398121)were used for PCR. The target frag-ments were sequenced and aligned. The gene localization,genome structure,composition of nucleotide,distribution of variable sites,and phylogeny were analyzed by employing multiple softwares. Results Five distinct types were identified from seven com-plete MT genomes. They were similar in size and structure,i.e.,ranging 13 491-13 502 bp,including 12 protein-coding genes,2 ribosomal genes,22 tRNA genes,and 2 major non-coding regions. All the genes were localized at the same strand and had the same transcription direction. A total of 745 variable sites were identified,accounting for 5.5%. Among the variable sites,59 were deletion/insert mutations,105 transversions,and 581 transitions. The variable sites distributed evenly at the complete genome. Conclusion The study reveals the mutation profile in the whole MT genome of A. cantonensis and thus will facilitate the develop-ment of intraspecific differential diagnosis.

Objective To study the changes of hearing function and cochlear morphology on diffuse brain in-jury model in rat .Methods One hundred and fifty SD rats with normal hearing were randomly divided into five groups ,each group consisted of 30 SD rats ,including a control group and four experimental groups which endured diffuse brain injury(DBI) from one to four weeks .Diffuse brain injury model of rats were established ,then ABR , 40 Hz AERP and ASSR examination ,light microscopy ,electron microscopy were used to evaluate the change of hearing function and morphology .Results The difference of ABR ,40 Hz AERP and ASSR thresholds between the experimental and the normal control group were significant (P<0 .05) .The thresholds of ABR ,40HzAERP and AS-SR were increased in the first week of DBI ,then the threshold continuously increased in the second and third week , at last the threshold decreased in the fourth week .The results under scaning electron microscope demonstrated that the ciliums of the majority of outer hair cells lodged in the first week of DBI .The results under transmission electron microscope showed that in the first week of DBI ,there were edema and denuration of mitochondrial ,mitochondrial cristaes were obscured or disappeared .The changes were deteriorate in the second and third week ,whereas the changes were mitigatal in the fourth week .Conclusion Cochlear morphology and hearing damage were observed in diffuse brain injury model of rats .