Due to the advancement of 16S rRNA sequencing technology, the lower respiratory tract microbiota, which was considered non-existent, has been revealed. The correlation between these microorganisms and diseases such as tumor has been a hot topic in recent years. As the bacteria in the surrounding can infiltrate the tumors, researchers have also begun to pay attention to the biological behavior of tumor bacteria and their interaction with tumors. In this review, we present the characteristic of the lower respiratory tract bacteria and summarize recent research findings on the relationship between these microbiota and lung cancer. On top of that, we also summarize the basic feature of bacteria in tumors and focus on the characteristic of the bacteria in lung cancer. The relationship between bacteria in lung cancer and tumor development is also been discussed. Finally, we review the potential clinical applications of bacterial communities in the lower respiratory tract and lung cancer, and summarize key points of sample collection, sequencing, and contamination control, hoping to provide new ideas for the screening and treatment of tumors.
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Humans ; Lung Neoplasms ; RNA, Ribosomal, 16S/genetics* ; Bacteria/genetics* ; Microbiota ; Respiratory System ; Lung/microbiology*

Objective:To investigate the short-term efficacy and safety of cardiac contractility modulation (CCM) in patients with heart failure.Methods:This was a cross-sectional study of patients with heart failure who underwent CCM placement at the First Affiliated Hospital of Xinjiang Medical University from February to June 2022. With a follow-up of 3 months, CCM sensation, impedance, percent output, and work time were monitored, and patients were compared with pre-and 3-month postoperative left ventricular ejection fraction (LVEF) values, and 6-minute walk test distance and New York Heart Association (NYHA) cardiac function classification, and the occurrence of complications was recorded.Results:CCM was successfully implanted in all 9 patients. Seven(7/9) of them were male, aged (56±14) years, 3 patients had ischaemic cardiomyopathy and 6 patients had dilated cardiomyopathy. At 3-month postoperative follow-up, threshold was stable, sense was significantly lower at follow-up than before (right ventricle: (16.3±7.0) mV vs. (8.2±1.1) mV, P<0.05; local sense: (15.7±4.9) mV vs. (6.7±2.5) mV, P<0.05), and impedance was significantly lower at follow-up than before (right ventricle (846±179) Ω vs. (470±65) Ω, P<0.05, local sense: (832±246) Ω vs. (464±63) Ω, P<0.05). The CCM output percentage was (86.9±10.7) %, the output amplitude was (6.7±0.4) V, and the daily operating time was (8.6±1.0) h. LVEF was elevated compared to preoperative ((29.4±5.2) % vs. (38.3±4.3) %, P<0.05), the 6-minute walk test was significantly longer than before ((96.8±66.7)m vs. (289.3±121.7)m, P<0.05). No significant increase in the number of NYHA Class Ⅲ-Ⅳ patients was seen (7/9 vs. 2/9, P>0.05). The patient was not re-hospitalised for worsening heart failure symptoms, had no malignant arrhythmic events and experienced significant relief of symptoms such as chest tightness and shortness of breath. No postoperative complications related to pocket hematoma, pocket infection and rupture, electrode detachment, valve function impairment, pericardial effusion, or cardiac perforation were found. Conclusions:CCM has better short-term safety and efficacy in patients with heart failure.

Objective To investigate the correlation between pericarotid fat density(PFD)and carotid plaque CT vulnerability characteristics.Methods The clinical and imaging data of 78 patients were analyzed retrospectively.PFD and subcutaneous neck fat density(SNFD),as well as plaque density,degree of lumen stenosis,and maximum plaque thickness were measured on picture archiving and communication system(PACS),and PFD/SNFD ratio was calculated.The plaques were divided into 4 subgroups according to their composition,namely fatty plaque group,fibrous plaque group,calcified plaque group and mixed plaque group.The groups were divided into no/mild-to-moderate stenosis group and severe stenosis/complete occlusion group according to the degree of stenosis,and the differences between groups were compared for clinical indices,PFD,SNFD and PFD/SNFD ratio,respectively.Results The PFD/SNFD ratio[0.54(0.32,0.72)]in the fatty plaque group was lower than that in the calcified plaque group[0.74(0.56,0.96)],with a statistically significant difference(P=0.005).The PFD/SNFD ratio in the severe stenosis/complete occlusion group(0.51±0.29)was lower than that in the no/mild-to-moderate stenosis group(0.67±0.27)(P=0.001),and the PFD in the severe stenosis/complete occlusion group[-39.75(-61.13,-24.00)]was higher than that in the no/mild-to-moderate stenosis group[-61.75(-72.00,-45.38)](P＜0.001).Conclusion PFD,PFD/SNFD ratio are correlated with carotid plaque vulnerability.

Objective To analyze the clinical application value of cinematic rendering(CR)reconstruction technology in acute aortic dissection(AAD),and to compare the imaging quality between CR and volume rendering(VR)reconstruction.Methods Patients with suspected A AD who underwent aortic computed tomography angiography(CTA)were analyzed retrospectively.All images were uploaded to Siemens Syngo.via post-processing workstation for VR and CR three-dimensional reconstruction,respectively.The optimized view angle,staining and transparency were selected and segmented by a radiologist to display the lesion to the full extent.All subjective evaluations of post-processing images were randomly evaluated on Siemens Syngo.via post-processing workstation by two radiologists.The two radiologists reached a consensus after consultation,and the results without consensus were evaluated by another senior radiologist.The 3-point scale was used in the subjective evaluation of post-processing images.The scores of rupture,endometrium,and true and false cavity were recorded.The diagnostic confidence was also recorded.Results A total of 21 ADD patients were enrolled,11 patients(52.3％)were Debakey Ⅲ type.The scores of rupture in CR and VR reconstruction were 2.952 points and 2.619 points,respectively,which had significant difference(P=0.016).For the endometrium of AAD,the score of all 21 patients in the CR reconstruction was 3 points,while only 7 patients(33.3％)in the VR reconstruction had 3 points,which showed significant difference between the both(P＜0.001).For the true and false cavity of AAD,only 1 patient(4.8％)in the VR reconstruction was 3 points,while all 21 patients in the CR reconstruction had 3 points(P＜0.001).The scores of CR reconstruction on the diagnostic confidence were significantly higher than those of VR reconstruction(P＜0.001).Conclusion CR reconstruction can provide photorealistic anatomical post-processing images,and can improve the display and evaluation of AAD.

Objective:To analyze the relationship between CT attenuation value of pulmonary artery thrombi and the efficacy of interventional thrombolysis in patients with acute pulmonary embolism (APE).Methods:This was a single center cross-sectional study. The clinical and imaging data of 89 APE patients who underwent interventional thrombolysis in Affiliated Hospital of Xuzhou Medical University from January 2018 to December 2022, were retrospectively analyzed. All patients underwent CT pulmonary angiography (CTPA) before and after thrombolysis, the CT attenuation value of pulmonary artery thrombi and ratio of CT attenuation value of thrombi to left subscapularis muscle CT value were obtained; and the difference of Qanadli embolism index (ΔQ) before and after thrombolysis was calculated. According to the median ΔQ, patients were classified as good efficacy group (ΔQ>50%) and poor efficacy group (ΔQ≤50%). The clinical characteristics and quantitative parameters of CT were compared between the two groups, and the factors associated with efficacy of thrombolysis were analyzed with univariate and multivariate logistic regression. The correlation between CT attenuation value of pulmonary artery thrombi and ΔQ was analyzed by Spearman correlation analysis.Results:The CT attenuation value of thrombi and ratio of attenuation value of thrombi to left subscapularis muscle CT value showed significant difference between the two groups ( P<0.05). Multivariate analysis showed that compared with CT attenuation value of emboli≤53.47 HU, the value>53.47 HU might be associated with the good efficacy of thrombosysis ( OR=9.175, 95% CI: 0.937-89.846, P=0.057). There was a positive correlation between CT value of pulmonary artery thrombi and ΔQ ( r=0.365, P<0.001). Conclusion:The CT attenuation value of thrombi can predict the efficacy of interventional thrombolysis in APE patients, and patients with higher CT attenuation value would have a better treatment response.

Objective To assess the clinical characteristics of acute-on-chronic liver failure in patients with recompensatory hepatitis B cirrhosis. Methods A total of 180 patients with acute-on-chronic liver failure hospitalized in Tianjin Third Central Hospital from September 2013 to September 2021 were retrospectively collected, with 110 patients had compensatory hepatitis B cirrhosis and 70 patients had compensatory hepatitis B cirrhosis and used as the control. Their causes, clinical biochemical indicators, complication rate, and prognosis were compared. The Chi-square test or Fisher's exact test was used for comparison of categorical variables between groups, and the Mann-Whitney U test was performed for analysis of the continuous variables. Kaplan-Meier curves and Log-rank test were used for survival of patients. Results The incidence of hepatorenal syndrome ( χ 2 =4.618, P =0.032), infection ( χ 2 =6.712, P =0.010), Cr ( Z =-4.508, P < 0.001), and PCT ( Z =-2.052, P =0.040) were all higher, whereas GGT ( Z =-2.042, P =0.041), Na ( Z =-2.001, P =0.045), FBS ( Z =-3.065, P =0.002), and TC ( Z =-4.268, P < 0.001) were all lower in the recompensation group than in the control group of patients. However, 90-day mortality rate ( χ 2 =3.366, P =0.067) and 1-year mortality rate ( χ 2 =1.893, P =0.169), 90-day survival ( χ 2 =2.68, P =0.100), and 1-year survival ( χ 2 =2.074, P =0.150) were not statistically significant difference. Conclusion Compared with compensatory hepatitis B cirrhosis, patients with recompensatory cirrhosis had an increased risk in developing hepatorenal syndrome, infection, and increased creatinine level after acute-on-chronic liver failure, although there was no statistically significant difference in 90-days and 1-year survival of patients.

Objective:To evaluate the role of adenosine monophosphate-dependent protein kinase/p38 mitogen-activated protein kinase/nuclear factor E2-associated factor 2 (AMPK/p38 MAPK/Nrf2) pathway in myocardial ischemia-reperfusion (I/R) injury in diabetic rats.Methods:Clean-grade healthy Sprague-Dawley male rats, aged 2-3 months, weighing 220-280 g, were fed with a high fat diet, and 1% streptozotocin 50 mg/kg was intraperitoneally injected for 4 consecutive days to develop the model of diabetes mellitus.Thirty diabetic rats were divided into 3 groups ( n=10 each) using the random number table method: sham operation group (sham group), myocardial I/R group (I/R group), and AMPK inhibitor compound C+ myocardial I/R group (C+ I/R group). The model of myocardial I/R injury was developed by ligation of the left anterior descending coronary artery for 30 min followed by 120 min reperfusion.Compound C 0.5 mg/kg was injected via the caudal vein at 30 min before ischemia in C+ I/R group, while the equal volume of normal saline was given instead in Sham group and I/R group.At 120 min of reperfusion, the percentage of myocardial infarct size was calculated, the serum concentrations of creatine kinase isoenzymes (CK-MB) and lactic dehydrogenase (LDH) were determined by enzyme-linked immunosorbent assay, the levels of glutathione (GSH), superoxide dismutase (SOD) and reactive oxygen species (ROS) in myocardial tissues were measured by enzyme-linked immunosorbent assay, and the expression of AMPK, phosphorylated AMPK (p-AMPK), phosphorylated p38 MAPK (p-p38 MAPK), Nrf2 and heme oxygenase-1 (HO-1) in myocardium was determined by Western blot. Results:Compared with Sham group, the percentage of myocardial infarct size and serum CK-MB and LDH levels were significantly increased, the levels of GSH and SOD in myocardial tissues were decreased, ROS level was increased, and the expression of AMPK, p-AMPK, p-p38 MAPK, Nrf2 and HO-1 was up-regulated in I/R group ( P<0.05). Compared with I/R group, the percentage of myocardial infarct size and serum CK-MB and LDH levels were significantly increased, the levels of GSH and SOD in myocardial tissues were decreased, ROS level was increased, and the expression of AMPK, Nrf2 and HO-1 was down-regulated in C+ I/R group ( P<0.05). Conclusions:AMPK/p38 MAPK/Nrf2 signaling pathway is involved in the mechanism of endogenous antioxidant stress during myocardial I/R in diabetic rats.

The imbalance of lipid metabolism is an important factor causing a series of metabolic diseases such as non-alcoholic fatty liver disease (NAFLD) and hyperlipidemia.Liver X receptors is a member of the nuclear receptor superfamily, which maintains cholesterol homeostasis by regulating cholesterol absorption, transport, reverse cholesterol transport, biosynthesis and other functions.It plays an important role in maintaining lipid homeostasis by regulating de novo fat synthesis to maintain the balance of fatty acids in the body.

Objective To investigate the influencing factors for rebleeding after gastroscopy in patients with liver cirrhosis and esophagogastric variceal bleeding. Methods A retrospective analysis was performed for the clinical data of the patients with liver cirrhosis and esophagogastric variceal bleeding who were hospitalized in Tianjin Third Central Hospital from January 1, 2017 to December 31, 2018, and according to the presence or absence of rebleeding and bleeding time, the patients were divided into non-bleeding group ( n =148) and bleeding group ( n =119). The risk factors for rebleeding after gastroscopy were analyzed. The t -test or the Mann-Whitney U test was used for comparison of continuous data between two groups, and the chi-square test was used for comparison of categorical data between two groups. The Cox regression model was used for univariate and multivariate analyses. The receiver operating characteristic (ROC) curve was used to evaluate the accuracy of Child-Turcotte-Pugh (CTP), fibrosis-4 (FIB-4), and albumin-bilirubin (ALBI) scores in predicting rebleeding after gastroscopy, and MedCalc was used to compare the area under the ROC curve (AUC). Results A total of 267 patients with liver cirrhosis and esophagogastric variceal bleeding were enrolled, among whom 53 (19.9%) had liver cancer. A total of 119 patients suffered from rebleeding, with an overall rebleeding rate of 44.6% and a median time to rebleeding of 11.0 (0-39.0) months. The univariate Cox regression analysis showed that liver cancer (hazard ratio [ HR ]=0.377, P < 0.001), aspartate aminotransferase (AST) ( HR =1.002, P =0.025), serum Na ( HR =0.935, P =0.004), and FIB-4 ( HR =1.030, P =0.049) were associated with rebleeding, and the multivariate Cox regression analysis showed that liver cancer ( HR =0.357, P < 0.001), AST ( HR =1.003, P =0.030), prothrombin time (PT) ( HR =0.196, P =0.001), CTP score ( HR =1.289, P =0.014), FIB-4 ( HR =1.062, P =0.033), and ALBI score ( HR =0.433, P =0.011) were independent risk factors for rebleeding. CTP, FIB-4, and ALBI scores had an AUC of 0.711 (95% confidence interval [ CI ]: 0.647-0.776), 0.705 (95% CI : 0.640-0.770), and 0.730 (95% CI : 0.667-0.793), respectively, in predicting rebleeding. There was no significant difference in AUC between CTP, FIB-4, and ALBI scores ( P > 0.05). Conclusion Liver cancer, AST, PT, CTP score, FIB-4 score, and ALBI score are associated with rebleeding after gastroscopy in patients with liver cirrhosis and esophagogastric variceal bleeding, among which CTP, FIB-4, and ALBI scores have a good value in predicting rebleeding outcome, while there is no significant difference in predictive ability between them.

With the rapid changes in lifestyle, natural and social environment, the reproductive health status of couples in childbearing age continues to decline, and long-term outcomes of the rapidly increasing offspring conceived by assisted reproductive technology (ART) needs to be evaluated urgently. Therefore, the focus of research now needs to be extended from death and severe diseases to full life cycle and full disease spectrum. In order to meet the demand for such research, we launched the China National Birth Cohort (CNBC) study, an ongoing prospective and longitudinal study aiming to recruit 30 000 families underwent ART and 30 000 families with spontaneous pregnancies. Long-term follow-up programs will be conducted for both spouses and their offspring. Data of couples and their offspring, such as environmental exposure, reproductive history, psychological and behavioral status, will be collected during follow-up. Peripheral blood, urine, umbilical blood, follicular fluid, semen were also collected at different follow-up nodes. Based on high-quality data and biological samples, CNBC will play an extremely important supporting role and have a far-reaching impact on maternal and children's health care and reproductive health in China. This paper is exactly a brief introduction to the construction and basic design of CNBC.