Objective:To analysis the correlation of Wnt/β-catenin signaling pathway,OPN and MMP-13 in rabbit model with different degree of osteoarthritis (OA).Methods:Forty New Zealand white rabbits were randomly divided into four groups of 10 each,then we constructed the rabbit model with different degree of osteoarthritis (OA) by different concentrations of papain.The mRNA and protein levels of β-catenin,OPN,MMP-13,type Ⅱ collagen and proteoglycan were detected by Real-Time PCR and ELISA,respectively.Results:We have successfully established OA rabbit model by different concentrations of papain,and these OA rabbits model could be divided into mild,moderate and severe three level by Mankin scoring system,chondrocytes.Compared with the normal control group,the protein levels of β-catenin,OPN,and MMP-13 in the osteoarthritis were significantly increased,while the protein levels of type Ⅱ collagen and proteoglycan were significantly decreased (P＜0.05).With the increasing severity of OA,the results were consistent (P＜0.05).Conclusions:These results indicated that Wnt/β-catenin signaling pathway might regulate the expression of OPN,thereby affecting the expression of MMP-13,and ultimately have an impact on the occurrence ofosteoarthritis.

ObjectiveTo investigate the developmental status and their relationship of self-supporting personality and career maturity of medical students.Methods450 medical students were surveyed by self-supporting personality scale and career maturity questionnaire.Descriptive statistical analysis,t-test,correlation analysis and regression analysis were used to do data analysis.Results ( 1 ) Most dimensions of self-supporting personality such as personal initiative,interpersonal initiative,interpersonal flexibility and personal responsibility were positively related to the career maturity ( r=0.53,P＜0.01 ; r=0.49,P＜0.01; r=0.46,P＜0.01 ; r=0.45,P＜ 0.01 ).(2)Career maturity of medical students can be positively predicted by several dimensions of self-supporting personality ( R2 =0.49,F=60.10,P＜ 0.01 ).ConclusionThe career maturity of medical students is closely associated with their self-supporting personality.

Objective To investigate the relationship between the apolipoprotein B (ApoB) gene Xba Ⅰ and EcoR Ⅰ polymorphisms and cholelithiasis in Han and Mongolian population in the Midwest Area of Inner Mongolia.Methods The clinical data of 100 patients with cholelithiasis and 115 healthy individuals at the First Affiliated Hospital of Medical College of Baotou from April to October in 2010 were collected.A case-control study which detected ApoB alleles of patients with cholelithiasis (cholelithiasis group) and healthy individuals (control group) in Han nationality and Mongolian nationality in the Midwest Area of Inner Mongolia was conducted by polymerase chain reaction-restriction fragment length polymorphism,which included Xba Ⅰ (X + X +,X + X-,X-X-,X +,X-) and EcoR Ⅰ (E + E +,E-E-,E + E-,E +,E-).The serum lipid (including triglyceride,total cholesterol,high density lipoprotein and low density lipoprotein) levels in different groups were detected.The count data and the measurement data were analyzed using the chi-square test and t test,respectively.Results Genotype X + X + was not found in the Han and Mongolian population,and Xba Ⅰ (X +) or EcoR Ⅰ (E-) alleles was not found in the Mongolian population.The levels of low density lipoprotein were (2.8 ± 0.9)mmol/L in the cholelithiasis group,which was significantly higher than (1.9 ± 0.8) mmol/L of the control group in the Han population (t =2.800,P ＜ 0.05).The levels of high density lipoprotein and low density lipoprotein were (1.7 ± 0.3) mmol/L and (3.5 ± 0.8) mmol/L of the cholelithiasis group,which were significantly higher than (1.2 ± 0.3) mmol/L and (2.8 ± 0.9) mmol/L of the control group in the Mongolian population (t =7.596,2.549,P ＜ 0.05).The levels of triglyceride,total cholesterol,high density lipoprotein and low density lipoprotein of the cholelithiasis group in the Mongolian population were (3.1 ± 1.6) mmol/L,(5.6 ± 1.0) mmol/L,(1.7 ± 0.3) mmol/L and (3.5 ± 0.8) mmol/L,which were significantly higher than (1.2 ± 0.6) mmol/L,(4.4 ± 1.2) mmol/L,(1.3 ± 0.3) mmol/L and (2.8 ± 0.9) mmol/L of the cholelithiasis group in the Han population (t =5.501,3.667,4.448,3.430,P ＜ 0.05).The levels of triglyceride,total cholesterol,low density lipoprotein were (2.6 ± 1.7) mmol/L,(5.1 ± 1.1) mmol/L and (2.8 ± 0.9) mmol/L of the control group in the Mongolian population,which were significantly higher than (1.3 ±0.7)mmol/L,(3.9 ±0.9) mmol/L and (1.9 ±0.8) mmol/L of the control group in the Han population (t =4.298,4.772,3.888,P ＜ 0.05),while the level of high density lipoprotein was significantly higher of the control group in the Han nationality than the control group in the Mongolian population (t =1.997,P ＜ 0.05).The levels of low density lipoprotein in patients with genotypes X + X-,X-X-of the cholelithiasis group in the Han population were (2.7 ± 0.1) mmol/L and (2.6 ± 1.0) mmol/L,and the levels of low density lipoprotein in patients with genoeypes E + E ±,E + E-/E-E-were (2.6 ± 1.0) mmol/L and (2.5±0.4)mmol/L,with no significant difference (t=0.225,0.124,P＞0.05).Conclusion In the Midwest area of Inner Mongolia,the Mongolian population might be more susceptible to cholelithiasis than the Han population.No relationship between the rare alleles X +,E-and the increase of blood lipids,which indicates that X + and E-of ApoB may not be a risk factor of cholelithiasis.

To observe the effects of paeoniflorin and total flavones extracted from Qixue Bingzhi Recipe on proliferation of vascular smooth muscle cells (VSMCs) cultured in endothelial cell conditioned medium (EC-CM) induced by oxidized low-density lipoprotein (ox-LDL) and the expressions of platelet-derived growth factor and its receptor genes.

Objective To evaluate the impact of multiple lacunar infarction (MLI) on the outcomes of mild cognitive impairment (MCI). Methods MCI patients were selected in outpatients and hospitalized patients using a common international standard MCI screen. Magnetic resonance imaging (MRI) and computer tomography (CT) were used to determine the presence of MLI. MCI patients were followed up for 6～24 months and their cognitive status and the impact of MLI on MCI were evaluated using Kaplan-Meier survival analysis. Results One hundred twenty patients were diagnosed as having MCI based on clinical evaluation and neuropsychological assessment. Among them, 43 (35.8%) patients had MLI and the rest 77 (64.1%) patients did not have. Twenty-seven MCI patients with MLI (62.8%) developed dementia, while 15 MCI patients without MLI (19.4%) developed dementia during 6～24 months follow-up. Kaplan-Meier analysis indicated that the incidence of dementia was significantly higher in patients with MLI than in patients without MLI did (P＜0.05). Conclusions MCI patients with MLI are more prone to dementia. These results suggest that early interventions aimed at controlling the modifiable risks are warranted for dementia prevention in MCI patients with MLI.

Objective To define the normal reference values of acetabular index and Sharp angle through 2333 standard anterior-posterior pelvic radiographs. Methods In our study, 2333 normal anteriorposterior pelvic radiograph images with standard exposure were selected. All the images were diagnozed normal by two radiologists and two pediatricians according to the criteria of T(o)nnis. All subjects were without any neuromuscular diseases and congenital defoemity. The acetabular index was measure in the subjects between age 0 to 10 years, and the groups were divided monthly within 1 year and yearly between 1 to 10years. The Sharp angle was measure in the subjects after 10 years, and the groups were divided yearly in adolescence and decadely in adults. Normal values of each age groups and the correlation charts were completed according to statistical analysis. Results The mean acetabular index was 28.39° in neonates followed by a steep decrease in the first three months after born. It decreased to 22.17°in the 1st year, 12.80°in the 10th years and then kept constant. Acetabular index of the female was generally 1°-2°larger than that of the male with statistical significance. The mean Sharp angle was 46.72°in the 10th years, which decreased to 39.10°in the 18th years and 35.69°in elderly people. Another declination was observed after age 40.Generally no gender difference was observed. Conclusion Acetabular index and Sharp angle vary with age.They reflect a dramatic morphological change in the acetabulum before adulthood and stay constant afterwards. Gender difference is obvious in many age groups but not all. Normal reference ranges of both gender at all age groups should be considered in clinical evaluation.

Objective To investigate the suitable injection rate and dose in multi-slice CT perfusion imaging.Methods Randomized block design was adopted in this study.The treatment factor-contrast medium injection rate was classified into 3,4,5,6 and 8 ml/s;thesubjects were divided into 5 blocks grouped by contrast medium injection dose: 0.5,0.75,1,1.25 and 1.5 ml/kg.25 Beagles wererandomly enrolled to undergo cerebral CT perfusion imaging.After post processing,time to peak(TTP) and rise value(RV) were measured in superior sagital venous.Results Injection rate had a significant effect on TTP of superior sagital venous.There was no significant difference among group 5,6 and 8 ml/s.Compared with 8 ml/s,TTP of superior sagital venous was prolonged when injection rate 3,4 ml/swere adopted.Injection dose had a significant effect on RV of superior sagital venous.There was no significant difference among group 1,1.25 and 1.5 ml/kg.In comparison with 1 ml/kg,RV of superior sagital venous was prolonged when injection dose 0.5 and 0.75 ml/kg were adopted.Conclusion The quality of cerebral CT perfusion imaging is well enough even injection rate as low as 5 ml/s or injection dose as few as 1 ml/kg.

BACKGROUND:Sodium butyrate, a histone deacetylase inhibitor, can inhibit cell proliferation, and induce apoptosis and differentiation of various cancer cells. However, the role of sodium butyrate combined with tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) on lung cancer stem cells remains unclear. OBJECTIVE:To explore the effect of sodium butyrate combined with TRAIL on biological behaviors of lung cancer stem cells. METHODS:Magnetic bead separation was used to separate lung cancer stem cells (CD133+) from human lung adenocarcinoma A549 cells. After the lung cancer stem cells were treated with simple DMEM/F12, DMEM/F12 containing sodium butyrate (5 mmol/L), TRAIL (50 μg/L) or sodium butyrate combined with TRAIL, the cell proliferation within 96 hours of culture was determined by MTT assay; the apoptosis within 24 hours of culture was measured by flow cytometry; the cell migration within 48 hours of culture was detected by cell scratch test; the expression levels of pluripotent transcription factors (Oct4, Sox2 and Nanog) within 48 hours of culture were detected using western blot analysis. RESULTS AND CONCLUSION:The CD133+ lung cancer stem cells were successfully enriched from human lung adenocarcinoma A549 cells. MTT assay showed that sodium butyrate and TRAIL significantly inhibited the proliferation of lung cancer stem cells (P< 0.05), and the combination effect was even stronger (P < 0.05). Results from flow cytometry analysis and scratch test showed that sodium butyrate or TRAIL induced apoptosis and inhibited cell migration of lung cancer stem cells (P < 0.05), and the combination of sodium butyrate and TRAIL showed a stronger effect (P < 0.05). In addition, the expression levels of Oct4, Sox2 and Nanog were significantly down-regulated by sodium butyrate (P < 0.05), TRAIL or sodium butyrate combined with TRAIL, and the combination effect was stronger (P < 0.05). In conclusion, sodium butyrate and TRAIL have synergistic effects on lung cancer stem cells, indicating a new way for treatment of lung cancer.

Child ; Diagnosis, Differential ; Electrocardiography, Ambulatory ; Heart Atria ; pathology ; Humans ; Tachycardia, Ectopic Atrial ; diagnosis

Objective:To investigate the ultrasonographic characteristics and risk factors of breast cancer internal mammary lymph node (IMLN) metastasis.Methods:A retrospective analysis of 296 first diagnosed breast cancer patients in the Fourth Hospital of Hebei Medical University from March 2010 to May 2020. IMLN was divided into metastatic group (236 cases) and non-metastatic group (60 cases) based on pathology. Chi-square test and independent sample t test were used to analyze the ultrasound characteristics of IMLN metastasis and factors related to metastasis. ROC curve analysis of IMLNs were plotted to obtain the diagnostic thresholds and their sensitivity and specificity.Univariate and multivariate Logistic analysis was used to analyze the risk factors of IMLN metastasis. Results:①The appearances of IMLN in ultrasound were normal type, thickened-cortex type, unclear hilus structure type and thickened-nodular soft tissue type. ②In the two groups, the differences in IMLN long diameter, thickness diameter, number, and lymphatic hilum structure type were statistically significant (all P<0.05), and there were no significant differences in IMLN long diameter/thickness diameter and IMLN blood supply (all P>0.05). ③The long diameter threshold of IMLN for diagnosis of metastasis was 10.5 mm, the are under the ROC curve(AUC) was 0.825, with sensitivity of 58.5% and specificity 93.3%; thickness and diameter threshold was 4.5 mm, AUC was 0.790, with sensitivity 66.9% and specificity 75.0%. The sensitivity and specificity of the diagnosis of long-diameter combined structure type were 56.3% and 93.3%, respectively; the sensitivity and specificity of the diagnosis of thick-diameter combined structure type were 64.8% and 81.7%, respectively. The cortical thickness threshold was 1.9 mm, and the diagnostic sensitivity and specificity were 91.9% and 86.7%, respectively. ④The risk factors of IMLN metastasis inculded univariate analysis showed tumor length, tumor volume, axillary lymph node long diameter, axillary lymph node metastasis, and clavicle lymph node metastasis. There was a statistically significant difference in the pathology of the lower lymph nodes between the two groups ( P<0.05). Multivariate analysis showed that the long diameter of the tumor and the metastasis of the axillary lymph nodes were independent risk factors of IMLN metastasis. Conclusions:The metastatic IMLN mostly manifest as no lymphatic hilum structure or cortical thickening (≥1.9 mm), and multiple IMLN can help diagnose metastasis.Ultrasound can better assess breast cancer IMLN metastasis, and the diagnostic efficiency of IMLN long-diameter combines structure type is higher.Independent risk factors for IMLN metastasis include tumor size and axillary lymph node metastasis.