Chlamydia pneumoniae is one of the most common pathogens causing community acquired pneumonia.It may activate immune cells,release mediators of inflammation and cytokine and cause immune response.Researches on its signal transduction after infection through Toll-like receptors may help prevent and cure chlamydia penumoniae infection disease.

Objective: To investigate the role of Toll-like receptor 4(TLR4) in the inflammatory reaction in the mouse model of Chlamydia pneumoniae(Cpn) infection.Methods: We divided 60 TLR4 mutant C3H/HeJ and 60 wild type C3H/HeN male mice into 4 groups: a mutant control(M),a mutant infection(M+I),a wild type control(W) and a wild type infection(W+I) group,each randomly assigned to 5 scheduled time points(1 d,4 d,7 d,14 d and 21 d).The animals in the M and W groups were intranasally inoculated with 2-sucrose phosphate(2SP) buffer,while those in the M+I and W+I groups with Cpn.All the mice were killed and their lung tissues were sampled on the above time points.The levels of TNF-? and IL-10 in the lung tissues were detected by enzyme-linked immunosobent assay(ELISA),histopathological examinations were performed,and the wet / dry weight(W / D) ratio was determined.Results: After Cpn inoculation,the lung tissues were characterized by patchy interstitial pneumonitis,predominantly infiltrated with neutrophil leukocytes in the earlier(7 d) stage and with lymphocytes in the later(14 d) stage.In the M+I group,the levels of TNF-? were elevated at 1 d([0.78?0.06] pg/mg),peaked at 4 d([1.22 ? 0.12] pg/mg) and then began to decrease,but was still higher than normal at 21 d;they were(1.10 ? 0.12,0.72 ? 0.12 and 0.52 ? 0.10) pg/mg at 7,14 and 21 d,significantly lower than in the W+I group([1.30 ? 0.16],[1.01 ? 0.19] and [0.71 ? 0.08] pg/mg,P

Objective To analyzes the CT manifestations of pulmonary Langerhans cell histiocytosis (PLCH). Methods CT features of 11 patients with PLCH proved pathologically were analyzed retrospectively. Results The main findings in 11 PLCHs were cysts and nodules. Two cases only had cysts,and 1 only had nodules, which most had cavitations. The other 8 cases showed cysts and nodules with 4 cases mainly manifested with cysts and nine mainly manifested with nodules. Two cases had pulmonary interstitial changes. One case only had cysts in the left upper lung field and 10 cases had lesions not only in the upper and middle but in the lower lung field, which 2 cases had more lesions in the lower and costophrenic angle field and 8 cases had less lesions in the costo-phrenic angle field. Three of these 8 cases had more lesions in the superior lobe and apical segment of lower lobe. Conclusion CT manifestations of PLCH are helpful for the early diagnosis.

Objective To study the anatomic data of the first metatarsal dorsal artery and to provide anatomical basis for clinical tissue transplantation based on the first metatarsal dorsal artery.Methods The 16 adult cadaver specimens with 32 feet were dissected and meas-ured by vernier caliper.Then the anatomic data of the first metatarsal dorsal artery were analyzed.Results Through the examinations of 32 feet sample,the first metatarsal dorsal artery were classified into 5 types.Type Ⅰ:the first metatarsal dorsal artery runs at the surface of the first dorsal interosseous muscle (13 sides,40.6%).Type Ⅱ:the first metatarsal dorsal artery runs in the interior of the first dorsal interosse-ous muscle (11sides,34.4%).Type Ⅲ:the first metatarsal dorsal artery runs underneath the first dorsal interosseous muscle (6 sides, 18.8%).Type Ⅳ:the first metatarsal dorsal artery is slender (1 side,3.1%).TypeⅤ:the first metatarsal dorsal artery is absent (1 side, 3.1%).Distance relationship was measured between the first metatarsal bone and the first metatarsal dorsal artery:the vertical distance be-tween the origin of the posterior branch of the first metatarsal dorsal artery and base of the first metatarsal bone was (2.4 ±0.3)mm,the ver-tical distance between the origin of the posterior branch of the first metatarsal dorsal artery and head of the first metatarsal bone was (10.1 ±1.0)mm;the vertical distance between the origin of the anterior branch of the first metatarsal dorsal artery and the first metatarso-phalangeal joint was (7.6 ±2.7)mm.Conclusion The first metatarsal dorsal artery has clinical reference significance for the hands and feet’s trauma and skin flap transplantation such as thumb reconstruction.

Objective To analyze the influence of liraglutide intervention combined percutanous coronary intervention(PCI) therapy on acute myocardial infarction( AMI) with type 2 diabetes( T2DM) patients'myocardial injury, ventricular remodeling( VR), and cardiac function. Methods Eighty patients with AMI and T2DM were included in the study, and they were randomly divided into observation group and control group according to the random number table, each with 40 patients. The patients in the control group received metformin and conventional insulin combined PCI treatment, and the patients in the observation group received metformin and liraglutide combined PCI treatment. The changes in the values of ventricular remodeling indexes, cardiac function and serum related indexes were compared after 3 months treatment between the two groups. Results ( 1) The body weight and fasting blood glucose levels of the observation group were significantly lower than those of the control group( P＜0.05), and fasting insulin levels were significantly higher than those of the control group(P＜0.01). (2)The levels of N-terminal-pro-B- type natriuretic peptide ( NT-proBNP ), creatine kinase isoenzymes-MB ( CK-MB), and troponin I ( TnI) in the observation group 3 months after treatment were significantly lower than those in the control group(P＜0.05). (3)The levels of serum hypersensitive C-reactive protein(hs-CRP), tumor necrosis factor-α(TNF-α), and interleukin-6(IL-6) in the observation group were significantly lower than those in the control group 3 months after treatment( P＜0. 05). ( 4) The values of left ventricular end systolic diameter ( LVESD ), left ventricular end diastolic diameter (LVEDD), interventricular septum thickness ( IVST), left ventricular posterior wall thickness ( LVPWT), left ventricular mass index ( LVMI), left ventricular end systolic volume ( LVESV), and left ventricular end diastolic volume(LVEDV) in the observation group were lower than those in the control group; the values of left ventricular fraction shortening(LVFS), left ventricular ejection fraction(LVEF), and mitral valve early diastolic blood flow rate (VE)/atrial systolic flow velocity ( VA), all were higher than those of the control group ( P＜0. 05). Conclusion Lraglutide intervention combined with PCI therapy on AMI with T2DM patients may reduce myocardial injury, induce ventricular remodeling, enhance cardiac function, and improve prognosis.

Objective To evaluate the feasibility of beside color Doppler ultrasound-guided popliteal vein catheter in treatment of lower extremity deep venous thrombosis (LEDVT).Methods Data of 50 patients with unilateral LEDVT were reviewed,including 25 cases underwent beside color Doppler ultrasound-guided catheter thrombolytic therapy (catheter thrombolytic group) and 25 cases underwent systemic thrombolysis and anticoagulant therapy (anticoagulant thrombolysis group).The cure rate,hospitalization time and the bilateral diameter differences were compared between the 2 groups.Results Thrombolytic effective rate was 100％ in both the 2 groups.Thirty patients were clinical cured,including 22 cases in catheter thrombolytic group and 8 cases in anticoagulant thrombolysis group.The cure rates were significantly different between the 2 groups (88.00％ [22/25] vs 32.00％ [8/25],x2 =16.333,P＜ 0.001).The hospitalization time of catheter thrombolytic group ([12.32 ± 1.49] days) was shorter than that of anticoagulant thrombolysis group ([16.44±2.95]days;t=-6.426,P＜0.001).The diameter differences between LEDVT side and contralateral side of the upper and lower 15 cm form knees in catheter thrombolytic group showed no statistical difference compared with anticoagulant thrombolysis group before the treatment (both P＞0.05),while of catheter thrombolytic group were smaller than those of anticoagulant thrombolysis group after the treatment (both P＜0.05).And the bilateral diameter differences before the treatment were larger than those after the treatment in both groups (all P ＜ 0.05).Conclusion Both of beside color Doppler ultrasound-guided catheter thrombolytic therapy and systemic thrombolysis and anticoagulant therapy can be used to treat LEDVT,while the efficacy of ultrasound-guided catheter thrombolytic therapy is better.

Objective:To explore the association of hemoglobin(HGB) levels with bone mineral density(BMD) and osteoporosis in patients with type 2 diabetes mellitus(T2DM).Methods:A cross-sectional study was conducted in 364 patients with T2DM who were hospitalized in the Department of Endocrinology and Geriatrics of the Affiliated Huaian No. 1 People′s Hospital of Nanjing Medical University from September 2019 to September 2020. Participants were stratified into tertiles(lower, middle, and upper) according to femoral BMD determined by dual-energy X-ray absorptiometry. Demographic characteristics, medical history, chronic diabetes complications, and comorbid conditions were compared among the 3 groups. The association between hemoglobin levels and BMD/osteoporosis was examined using multivariable logistic regression analyses. Interaction and stratified analyses were conducted according to age, body mass index(BMI), duration of diabetes, estimated glomerular filtration rate(eGFR), glycosylated hemoglobin(HbA 1C), total cholesterol(TC), triglycerides(TG), high-density lipoprotein-cholesterol(HDL-C), low-density lipoprotein-cholesterol(LDL-C) and uric acid(UA). Results:After adjusting for age, BMI, and duration of diabetes, there were no significant differences observed in the association between hemoglobin levels and BMD or osteoporosis among postmenopausal women with T2DM(all P>0.05). After adjusting for age, BMI, duration of diabetes, and eGFR, men aged≥50 years with hemoglobin≥130 g/L showed a positive association between hemoglobin level and femoral neck BMD compared to those with hemoglobin<130 g/L( β=0.057, 95% CI 0.014-0.100, P=0.011). However, no significant associations were observed between hemoglobin level and BMDs at the total hip or lumbar spine(L1-L4), nor the risk of osteoporosis(all P>0.05). Stratified analyses revealed no significant differences in the subgroups classified based on age, BMI, diabetes duration, eGFR, HbA 1C, TC, TG, HDL-C, LDL-C, and UA(all interaction P>0.05). Conclusion:In males aged 50 and above with T2DM, elevated hemoglobin levels may be a protective factor for femoral neck bone density.

Objective: To investigate the feasibility of early monitoring doxorubicin (DOX)-induced cardiotoxicity by apoptosis molecular imaging of 2-(5-[¹⁸F]fluoro-pentyl)-2-methyl-malonic acid (¹⁸F-ML-10) PET/CT. Methods: Forty-seven BALB/c mice were randomly divided into the chemotherapy group (n=30) and the control group (n=17) according to the random number table. The mice in chemotherapy group were intraperitoneally injected with DOX (4 mg/kg) once a week for 3 weeks and mice in the control group were injected with the same amount of normal saline. All mice were subjected to ¹⁸F-fluorodeoxyglucose (FDG) and ¹⁸F-ML-10 PET/CT imaging at day 0, 2, 9, 16, and left ventricular ejection fraction (LVEF) was continuously monitored using cine cardiac MR (cine-CMR) imaging. The region of interest (ROI) was delineated on PET/CT images, and the maximum percentage activity of injection dose per gram of tissue (%ID/g) was calculated. The mice were sacrificed after imaging, and the heart tissue was taken for HE staining and TdT-mediated dUTP nick end labeling (TUNEL) assay. One-way analysis of variance, independent-samples t test and Pearson correlation analysis were used to analyze the data. Results: In the chemotherapy group, the myocardial ¹⁸F-FDG uptake on day 0, 2, 9, 16 were (63.3±14.5), (93.7±24.0), (153.6±20.6) and (135.8±32.5) %ID/g respectively, and ¹⁸F-ML-10 uptake were (0.09±0.02), (0.18±0.03), (0.22±0.04) and (0.55±0.12) %ID/g respectively. Compared with baseline (day 0), ¹⁸F-FDG and ¹⁸F-ML-10 uptake were significantly increased in the chemotherapy group at each time point after DOX administration(F=6.823, 20.848, both P<0.01). The myocardial ¹⁸F-ML-10 and ¹⁸F-FDG uptake were essentially unchanged at all time points in the control group(F=2.036, 1.155, both P>0.05). TUNEL and HE staining indicated that the cardiomyocytes in the chemotherapy group showed obvious apoptosis and vacuolization, and the apoptotic index (AI) was positively correlated with the ¹⁸F-ML-10 uptake (r=0.950, P<0.01). The cine-CMR imaging results showed that the LVEF in the chemotherapy group continued to decrease after DOX administration (F=4.507, P<0.05), and significant difference was identified at day 16 (t=2.980, P<0.05). There was a significant negative correlation between ¹⁸F-ML-10 uptake and LVEF (r=-0.709, P=0.01). Conclusions Both ¹⁸F-FDG and ¹⁸F-ML-10 PET/CT imaging can early assess DOX-induced cardiotoxicity in vivo. Given the high targeting specificity of ¹⁸F-ML-10, it may have a greater clinical transformation advantage over ¹⁸F-FDG in early assessment of cardiotoxicity.