OBJECTIVE To explore the mechanism of the active ingredient compatibility（quercetin， quercitrin and kaempferol at a mass ratio of 2∶9∶3）of Dimocarpus longan Lour. leaves（abbreviated as CDL） on ameliorating glucose and lipid metabolism disorders in type 2 diabetes mellitus （T2DM） rats. METHODS SD rats were randomly divided into blank control group， model group， metformin hydrochloride group （100 mg/kg）， and CDL high-， medium- and low-dose groups （280， 140， 75 mg/kg）， with 10 rats in each group. Rats in the blank control group were fed with standard chow， while rats in the other groups were given high-sugar and high-fat diet combined with intraperitoneal injection of streptozotocin to establish the T2DM rat model. After successful modeling， rats in each administration group were given corresponding drug solution， and rats in the blank control group and model group were intragastrically administered with equal volume of pure water， once a day， for consecutive 4 weeks. Fasting blood glucose （FBG） was detected at fixed time every week. The curves of oral glucose tolerance test （OGTT） and intraperitoneal insulin tolerance test （IPITT） were plotted， and the area under curve （AUC） was calculated. The pancreatic islet function indexes [fasting insulin （FINS）， homeostasis model assessment of insulin resistance （HOMA-IR）， insulin sensitivity index （ISI）]，blood lipid indexes [total cholesterol （TC）， triglyceride （TG）， low-density lipoprotein cholesterol （LDL-C）， high-density lipoprotein cholesterol （HDL-C）] and hepatic glycogen content were determined. The pathological morphological changes of liver and pancreatic tissues were observed. The protein and mRNA expression levels of molecules related to phosphatidylinositol 3-kinase （PI3K）/protein kinase B （Akt） signaling pathway in liver tissues were detected. RESULTS Compared with the blank control group， the FBG， AUC of IPITT curve， AUC of OGTT curve， HOMA-IR， the levels of FINS， TC， TG and LDL-C， as well as the protein and mRNA expression of phosphatase and tensin homolog， forkhead box protein O1 and glycogen synthase kinase-3β in liver tissues were significantly increased in the model group （ P ＜0.05）. ISI， the levels of HDL-C and hepatic glycogen content， along with the protein and mRNA expression of PI3K， insulin receptor substrate-1， Akt and protein expression of phosphorylated Akt in liver tissues were markedly decreased （ P ＜0.05）. In model group rats， the arrangement of hepatocytes was irregular， the overall structure of pancreatic lobules was disordered， and a large number of inflammatory cell infiltration was observed. Compared with the model group， most of the above quantitative indexes were significantly reversed in the CDL high-dose group （ P ＜0.05）， and the pathological lesions of liver and pancreas were obviously alleviated. CONCLUSIONS CDL can regulate glucose and lipid metabolism disorders， elevate insulin sensitivity and relieve insulin resistance in T2DM rats. Its mechanism may be related to the activation of the PI3K/Akt signaling pathway.

OBJECTIVE To explore the mechanism of the active ingredient compatibility（quercetin， quercitrin and kaempferol at a mass ratio of 2∶9∶3）of Dimocarpus longan Lour. leaves（abbreviated as CDL） on ameliorating glucose and lipid metabolism disorders in type 2 diabetes mellitus （T2DM） rats. METHODS SD rats were randomly divided into blank control group， model group， metformin hydrochloride group （100 mg/kg）， and CDL high-， medium- and low-dose groups （280， 140， 75 mg/kg）， with 10 rats in each group. Rats in the blank control group were fed with standard chow， while rats in the other groups were given high-sugar and high-fat diet combined with intraperitoneal injection of streptozotocin to establish the T2DM rat model. After successful modeling， rats in each administration group were given corresponding drug solution， and rats in the blank control group and model group were intragastrically administered with equal volume of pure water， once a day， for consecutive 4 weeks. Fasting blood glucose （FBG） was detected at fixed time every week. The curves of oral glucose tolerance test （OGTT） and intraperitoneal insulin tolerance test （IPITT） were plotted， and the area under curve （AUC） was calculated. The pancreatic islet function indexes [fasting insulin （FINS）， homeostasis model assessment of insulin resistance （HOMA-IR）， insulin sensitivity index （ISI）]，blood lipid indexes [total cholesterol （TC）， triglyceride （TG）， low-density lipoprotein cholesterol （LDL-C）， high-density lipoprotein cholesterol （HDL-C）] and hepatic glycogen content were determined. The pathological morphological changes of liver and pancreatic tissues were observed. The protein and mRNA expression levels of molecules related to phosphatidylinositol 3-kinase （PI3K）/protein kinase B （Akt） signaling pathway in liver tissues were detected. RESULTS Compared with the blank control group， the FBG， AUC of IPITT curve， AUC of OGTT curve， HOMA-IR， the levels of FINS， TC， TG and LDL-C， as well as the protein and mRNA expression of phosphatase and tensin homolog， forkhead box protein O1 and glycogen synthase kinase-3β in liver tissues were significantly increased in the model group （ P ＜0.05）. ISI， the levels of HDL-C and hepatic glycogen content， along with the protein and mRNA expression of PI3K， insulin receptor substrate-1， Akt and protein expression of phosphorylated Akt in liver tissues were markedly decreased （ P ＜0.05）. In model group rats， the arrangement of hepatocytes was irregular， the overall structure of pancreatic lobules was disordered， and a large number of inflammatory cell infiltration was observed. Compared with the model group， most of the above quantitative indexes were significantly reversed in the CDL high-dose group （ P ＜0.05）， and the pathological lesions of liver and pancreas were obviously alleviated. CONCLUSIONS CDL can regulate glucose and lipid metabolism disorders， elevate insulin sensitivity and relieve insulin resistance in T2DM rats. Its mechanism may be related to the activation of the PI3K/Akt signaling pathway.

Objective To investigate the clinical features of spinocerebellar ataxia 12(SCA12).Methods The clinical data of a family with SC A1 2 diagnosed by gene detection were retrospectively analyzed,and the literature was reviewed.Results Three patients in this family were diagnosed as SCA12.Among them,2 patients with clinical symptoms were＞45 years old,the clinical symptoms were head tremor,upper limb tremor,voice tremor,dystonia and ataxia.Another one case was 31 years old,did not have relevant clinical manifestations yet.Cranial MRI showed that cerebral cortex atrophy was more serious than cerebellar atrophy in 2 patients.Conclusion SCA12 typically presents with upper limb tremor,with head tremor being less common,as the disease progresses,symptoms such as ataxia,dystonia,Parkinsonism,and cognitive impairment may develop,due to its highly heterogeneous clinical features,genetic testing can be helpful for diagnosis.

Objective To analyze the reasons for the failure of subject screening in clinical trials of antineoplastic drugs and the impact of natriuretic criteria on the entry of subjects into clinical trials,to explore the strategies to improve the suc-cessful enrolment of screened subjects,and to provide reference bases for research institutes and sponsors in the formulation of na-triuretic criteria.Methods This study selected data from 40 drug clinical trials conducted at the Drug Clinical Trial Research Center of the Cancer Hospital of the Chinese Academy of Medical Sciences from January 1,2016,to June 30,2022.It statistically described the collected data on the frequency and percentage composition of screening failures among participants and the inclu-sion and exclusion criteria in the protocols.Results A total of 425 subjects were screened out of 40 clinical trial programmers covering 8 tumor types,with the majority being＜65 years of age(333,78.4％),of which the most important reasons included vol-untary withdrawal(71,16.7％),tumor metastasis(52,12.2％),failure to recover from treatment of pre-existing disease(38,8.9％),failure of bone marrow function(19,4.5％),and non-compliant liver function(15,3.5％).Among the nadir indicators,the age of the subjects(100％),ECOG score(97.5％),bone marrow function(ANC:95.0％,PLT:97.5％,HB:97.5％),liver function(T-BiL:95.0％,ALT:87.5％,AST:95.0％),renal function(CR:80.0％),and viral screening(HIV:80.0％,HBV:70.0％,HCV:62.5％)were relatively stringent.Conclusion The main reasons for subject screening failure in clinical trials in oncology in our hospital are voluntary withdrawal,brain metastasis,and failure of their biochemical test standards,which are close-ly related to the setting of clinical trial nadir criteria.Therefore,an in-depth understanding of subjects'characteristics,accurate set-ting of appropriate nadir criteria,continuous improvement of trial design,and strengthening of communication with subjects to pro-vide more relevant information will help to improve the screening success rate of clinical trials.

Objective To explore the diagnostic value of non-contrast chest CT in acute pulmonary thromboembolism(APTE).Methods A total of 187 patients with suspected APTE who underwent non-contrast chest CT and computed tomography pulmonary angiography(CTPA)within 2 h were included.Among 187 patients,there were 89 patients with APTE(APTE group)and 98 patients without APTE(control group).The clinical characteristics and chest CT features between the APTE group and the control group were compared.The sensitivity and specificity of non-contrast chest CT findings in the diagnosis of central APTE and peripheral APTE were analyzed.Results Chest CT showed pulmonary artery hyperdensity sign in 35 cases in the APTE group and none in the control group,with the difference was statistically significant(χ2=47.414,P<0.001);Subpleural shadow appeared in 33 cases in the APTE group and 11 cases in the control group,with the difference was statistically significant(χ2=17.327,P<0.001).The sensitivity and specificity of pulmonary artery hyperdensity sign in the diagnosis of central APTE and peripheral APTE were 72.92%,100%and 0%,100%,respectively.The sensitivity and specificity of sub-pleural shadow in the diagnosis of central APTE and peripheral APTE were 39.58%,88.78%and 34.15%,88.78%,respectively.The difference was not statistically significant in pleural effusion,pulmonary artery diameter,or pulmonary artery diameter to aorta diameter ratio between the two groups.Conclusion The pulmonary artery hyperdensity sign on non-contrast chest CT is a useful sign of APTE,which can avoid CTPA examination.

Objective:To analyze the epidemiological characteristics and influencing factors of single-cigarette use and dual cigarette-cigar use in China.Methods:This study was a cross-sectional study that selected 85 638 urban and rural residents who met the inclusion criteria from the 2018 China Health Literacy Survey as research subjects. An analysis was conducted on 21 849 users of cigarettes and cigars among them. Due to the small number of individuals who exclusively used cigars (247 cases), the research subjects were divided into two categories: exclusive cigarette users and dual users of cigarettes and cigars. The groups were categorized by age (18-34 years, 35-54 years, ≥55 years), gender (male, female), education level (primary school and below, junior high school and high school, university and above) and annual household income (<20 000 yuan, 20 000-<80 000 yuan, ≥80 000 yuan) to compare the tobacco usage rate and conduct subgroup analyses for each subgroup. Multivariate logistic regression analysis was employed, incorporating general demographic characteristic information to explore the influencing factors of exclusive cigarette use and dual use of cigarettes and cigars, respectively.Results:The rate of exclusive cigarette use in our country was 24.3%, while the dual use rate of cigarettes and cigars was 0.9%. The exclusive cigarette use rate and the dual use rate of cigarettes and cigars among males were significantly higher than those among females (48.25% vs 2.48%, and 1.84% vs 0.06%) (both P<0.001). For males, the high-risk factors for exclusive cigarette use included living in urban areas ( OR: 1.37, 95% CI: 1.23-1.54), being Han ethnicity ( OR: 1.73, 95% CI: 1.51-1.98), and having an annual household income ≥20 000 yuan ( OR: 1.54, 95% CI: 1.38-1.82) while having a junior high school education or higher was a protective factor ( OR: 0.68, 95% CI: 0.52-0.90). Age≥35 years ( OR: 3.36, 95% CI: 2.62-4.32) and having a junior high school education or higher ( OR: 1.30, 95% CI: 1.02-1.67) were risk factors for dual use of cigarettes and cigars in males. Among females, living in urban areas ( OR: 1.53, 95% CI: 1.19-1.97) and being Han ethnicity ( OR: 5.96, 95% CI: 4.47-7.96) were risk factors for exclusive cigarette use, while having a university education or higher was a protective factor ( OR: 0.28, 95% CI: 0.18-0.42). However, for female dual use of cigarettes and cigars, no significant effects were observed for any demographic characteristics. Conclusions:The use rate of cigarettes alone in China is significantly higher than that of cigarette-cigar dual use, and the rates of cigarette use alone and cigarette-cigar dual use in men are significantly higher than those in women. Tobacco use is being affected by sociodemographic factors, among which place of residence, ethnicity and education level are the main influencing factors of cigarette use alone, and gender, age and education level are the main influencing factors of cigarette-cigar dual use.

Objective To investigate the relationship between between the levels of serum malondialdehyde(MDA)and superoxide dismutase(SOD),the balance of oxidative/antioxidant stress,and the prognostic nu-tritional index(PNI)and the risk of early neurological deterioration in patients with acute ischemic stroke(AIS).Methods A total of 95 patients with suspected AIS admitted to the Second People's Hospital of Fos-han,Foshan from January to April 2023 were selected as the research subjects.Among them,71 patients who were finally diagnosed with AIS were included in the stroke group,and the remaining 24 non-AIS patients were included in the control group.According to the National Institutes of Health Stroke Rating Scale(NIH-SS)score,the stroke group was divided into the moderate-severe stroke group and the mild stroke group.Ac-cording to whether early neurological deterioration(END)occurred,it was divided into the END group and the non-END group.To analyze the correlations between the levels of serum SOD and MDA,SOD/MDA,and the PNI and the severity of stroke.The receiver operating characteristic(ROC)curve was applied to evaluate the predictive value of each index for the risk of END.By fitting the indicators with high diagnostic efficacy,a Fisher discriminant function model for evaluating the risk of END was established to verify the overall accura-cy rate.Results The levels of serum MDA and SOD,SOD/MDA and the PNI in the moderate to severe stroke group were statistically different from those in the mild stroke group(P＜0.05).There were statistically sig-nificant differences in the levels of serum MDA and SOD,SOD/MDA and the PNI among the END group,the non-END group and the control group(P＜0.05).The areas under the curve(AUC)of SOD,MDA,SOD/MDA and PNI for evaluating END were 0.692,0.727,0.777 and 0.819,respectively.The Fisher discriminant function model established by fitting the NIHSS score,the SOD/MDA and the PNI has an overall accuracy rate of 85.9％.Conclusion The END risk prediction model established by applying the Fisher discriminant function can provide early and objective reference basis for clinical prediction of END risk and has certain practical value.

Objective To investigate the clinical features of spinocerebellar ataxia 12(SCA12).Methods The clinical data of a family with SC A1 2 diagnosed by gene detection were retrospectively analyzed,and the literature was reviewed.Results Three patients in this family were diagnosed as SCA12.Among them,2 patients with clinical symptoms were＞45 years old,the clinical symptoms were head tremor,upper limb tremor,voice tremor,dystonia and ataxia.Another one case was 31 years old,did not have relevant clinical manifestations yet.Cranial MRI showed that cerebral cortex atrophy was more serious than cerebellar atrophy in 2 patients.Conclusion SCA12 typically presents with upper limb tremor,with head tremor being less common,as the disease progresses,symptoms such as ataxia,dystonia,Parkinsonism,and cognitive impairment may develop,due to its highly heterogeneous clinical features,genetic testing can be helpful for diagnosis.

Objective:To explore the distribution characteristics of glioma-associated oncogene homolog 1 (Gli1) positive cells during orthodontic tooth movement process and conduct a proteomic analysis of these cells.Methods:Forty Gli1-LacZ transgenic mice were used to establish an in vivo orthodontic tooth movement (OTM) model for labeling Gli1 positive cells in Gli1-LacZ transgenic mice (OTM group) and an unforced control group, with tooth movement distance measured using micro-CT. The spatial relationship and distribution characteristics of Gli1 positive cells and H-type vessels of CD31 and endomucin (EMCN) in periodontal tissues were detected by immunofluorescence staining. Twenty Gli1-membrane-targeted tandem dimer Tomato (mT)/membrane-targeted green fluorescent protein (mG) double-genotype mice were bred and Gli1 positive cells were sorted for proteomic sequencing after tamoxifen induction. Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) databases were used for enrichment analysis. Results:The micro-CT three-dimensional reconstruction results showed that the mesial movement of the maxillary first molar in mice after 7 days of force application was (69±15) μm, indicating the successful establishment of the Gli1-LacZ transgenic mouse OTM model. Immunofluorescence staining showed that the blood vessels in periodontal tissue were mostly H-type vessels of CD31 and EMCN. The blood vessels in the periodontal tissues are predominantly H-type vessels positive for both CD31 and EMCN. The percentage of Gli1 positive cells in the OTM group, expressed as (54.5±13.2)%, and the relative fluorescence intensity, expressed as 2.6±0.9, were both significantly greater than those in the control group, which had a Gli1 positive cell percentage of (36.3±9.1)% ( t=3.60 , P=0.002) and a relative fluorescence intensity of 1.0±0.3 ( t=5.20, P<0.001). In contrast to the control group where only a small number of Gli1 positive cells were consistent with the distribution of H-type vessels, in the OTM group the number of Gli1 positive cells increased on the tension side were closely associated with the spatial distribution of H-type vessels. GO enrichment analysis of biological processes found that a large number of proteins in Gli1 positive cells were enriched in pathways such as angiogenesis and tissue remodeling. KEGG enrichment analysis found that related proteins were mainly enriched in pathways related to angiogenesis and Gli1, such as hypoxia-inducing factor 1 signaling pathway, vascular endothelial growth factor signaling pathway and hedgehog signaling pathway. Conclusions:The number of Gli1 positive cells increased on tension side and were closely related to H-type blood vessels in response to mechanical force during orthodontic tooth movement. This may be related to profile of inducing blood vessel formation and tissue remodeling.

Objective:To compare and analyze the similarities and differences in clinical manifestations, laboratory findings, pathological characteristics, and prognosis between urticarial vasculitis (UV) and chronic spontaneous urticaria with pigmentation (CSUwp) .Methods:A retrospective analysis was conducted on the clinical data and follow-up results from 35 UV patients and 54 CSUwp patients who attended the Department of Dermatology, Southwest Hospital, Army Medical University from 2014 to 2024. The clinical characteristics (duration of rash, pigmentation, petechiae and ecchymosis, itching, burning sensation, fever, fatigue, skin lesion characteristics, etc.) , laboratory test results, pathological features, and prognosis were compared between the two groups. Statistical analysis was carried out by t test, chi-square test, Mann-Whitney U test, and Kaplan-Meier survival analysis. Results:There were no significant differences in gender, age, or age of onset between the UV group and CSUwp group (all P < 0.05) . The proportions of patients with petechiae/purpura (68.57% [24/35] vs. 11.11% [6/54]) , and those with burning sensation (22.86% [8/35] vs. 3.70% [2/54]) were significantly higher in the UV group than in the CSUwp group (both P < 0.05) . Compared with the CSUwp patients, the UV patients presented with a greater number of lesions, larger lesion areas, and more frequent involvement of the lower limbs (all P < 0.05) , also showed significantly higher incidence rates of peripheral blood complement reduction, perivascular neutrophil infiltration, nuclear dust, fibrinoid necrosis of the vessel wall, and erythrocyte extravasation (all P < 0.05) , as well as more extensive dermal perivascular inflammation ( Z = -4.506, P < 0.001) . Among patients who achieved remission, the natural disease course was significantly longer in the CSUwp patients than in the UV patients (6.00 [2.5, 24] months vs. 2.00 [0.5, 24] months; Z = -2.618, P = 0.009]. However, the survival analysis showed no significant difference in the natural disease course or clinical outcomes between the two groups ( χ2 = 2.771, P = 0.096) . There were also no significant differences in rash duration or in the incidence rates of itching, angioedema, or joint pain between the two groups (all P > 0.05) . Conclusions:UV patients exhibited certain differences from CSUwp patients in clinical characteristics, laboratory test results, histopathological features, and prognosis. However, whether their natural disease courses differ requires further follow-up studies to confirm.