0.05).[Conclusion]BMSCs could be successfully differentiated into endothelial cells in vitro,and the functional genes were stably expressed in BMSCs-derived endothelial cells.They are ideal donor cells of tissue engineering vascularization.

Objective To investigate the expression and distribution of basic fibroblast growth factor (bFGF)and platelet-derived growth factor (PDGF)in the different phases of femoral neck fracture.Methods Immunohistochemical assays were used to determine the expression and distribution of bFGF and PDGF protein in 36 human specimen of femoral neck fracture.A was measured and analyzed by CMIAS color imaging analysis system for signals of bFGF protein were found high in the mesenchymal cells,monocyte and vascular endothelial cells at 1st week after fracture in 9 subjects,with A of (0.4076 ±0.0902).The weakly positive signals of PDGF protein were found in the mesenchymal cells,while strongly positive in the vascular endothelial cells with A of (0.2261 ±0.0636).At 2rd week,in 9 cases the expression of bFGF and PDGF was strongly expressed in fibroblasts,endothelial cells,cartilage cell and cartilage matrix,osteoblast,with A of[(0.6404±0.0920)and (0.7457±0.0756)]and significandy higher than that at 1st week (P＜0.05,P＜0.01).There was no significant difference between the 3rd and 3nd week with A of[(0.7168±0.1346)and (0.8033±0.0491),P＞0.05 ].The expression of bFGF and PDGF protein was reduced obviously at 4th week but was positive in young and cartilage tissue,with A of [(0.5374correlation between bFGF and PDGF protein in different phases (r1week=0.792,r2week=0.834,r3week=0.880,entiation of cartilage cell and osteoblast,and induce proliferation of vascular endothelial cells and new blood vessel.③ Both bFGF and PDGF are bone growth factors, cooperating in regulating proliferation and differentiation of cartilage cell and osteoblast for fracture healing.

We retrospectively reviewed clinical data of 150 elderly patients with serious chronic congestive heart failure who admitted in 1986, 1996 or 2006, including medication treatment, hospital stay,and admission interval. The results indicated that before 1990s, digitalis, diuretics, and blood vessel dilating agents were more often used in the treatment of chronic congestive heart failure(digitalis=100%,diuretics≥95%, blood vessel dilating agents>50%, β-blocker<10%, ACEI/ARB = 0% ). Since 1990s,the use of β-blocker, ACEI and ARB increased, which resulted in reduced hospital stay and increased admission interval(P<0.01). Our investigation suggests that evidence-based medication could be necessary in the treatment of elderly patients with chronic congestive heart failure.

This study examined the correlation between osteoporosis and the degeneration of intervertebral discs. Sprague-Dawley rats were maintained up to 22 or 28 months. The femoral bone, tibial bone and lumbar vertebra were histologically studied and the expression of collagen type II and X in intervertebral discs was immunohistochemiscally determined. Several indices for the degeneration of intervertebral discs and osteoporosis and the correlation among them were then analyzed. Close correlations were found among the indices for the degeneration of intervertebral discs, including the relative area of the vascular bud, the ratio of the uncalcified and the calcified layers, the expression of collagen type II and X. The correlation with collagen type X was negative. There existed positive correlations among the indices for osteoporosis, including the thickness ratio of cortical bone, the relative area of bone trabecula, the density of femoral and vertebral body bones, and the maximum stress and strain on bone. Analysis on the relationship of osteoporosis and the disease on disc showed that the indices of osteoporosis were negatively correlated with the indices of the degeneration of intervertebral discs but the expression of collagen type X was positively correlated, with the density of vertebral body bones having the strongest dependence on collagen type X. The maximum stress and strain bore no correlation with the degeneration of intervertebral discs. These results suggest that osteoporosis was negatively correlated with the degeneration of intervertebral discs.

The enrollment scale of clinical medicine postgraduates with professional degree was expanded each year in order to meet the needs of the society.How to train high quality medical talents in line with modem medical education and people's health needs was the problem we were confronted with.The affiliated hospital of Inner Mongolia medical university lunched reform on training mode of clinical medicine postgraduates with professional degree; the concrete measures included increasing postgraduate pre-service training,implementing tutor responsible system,applying PBL teaching and focusing on the overall quality training.Students' clinical competence was improved after the reform.

Three hundred cerebrovascular disease (CVD) patients (disease onset <3 days) were evaluated for serum C-reactive protein (CRP) level at admission, and Scandinavian Stroke Scale (SSS) or Oxford Handicap Scale (OHS) at baseline and 3 months. Based on serum CRP levels, the participants were divided into group A [CRP(1.20 ±0.35)mg/L], group B[CRP(4.98 ± 1.08) mg/L] or group C[CRP (19.34±12.27)mg/L]. Our results showed that serum CRP level was positively correlated with SSS (r = 0.39 or0.43, both P<0.01) and OHS (r=0.40 or0.42, both P<0.01) at3 months. Thus, evaluating serum CRP level within 3 clays of disease onset might be helpful in predicting clinical outcomes of CVD patients.

This study examined the correlation between osteoporosis and the degeneration of intervertebral discs.Sprague-Dawley rats were maintained up to 22 or 28 months.The femoral bone,tibial bone and lumbar vertebra were histologically studied and the expression of collagen type Ⅱ and X in intervertebral discs was immunohistochemiscally determined.Several indices for the degeneration of intervertebral discs and osteoporosis and the correlation among them were then analyzed.Close correlations were found among the indices for the degeneration of intervertebral discs,including the relative area of the vascular bud,the ratio of the uncalcified and the calcified layers,the expression of collagen type Ⅱ and X.The correlation with collagen type X was negative.There existed positive correlations among the indices for osteoporosis,including the thickness ratio of cortical bone,the relative area of bone trabecula,the density of femoral and vertebral body bones,and the maximum stress and strain on bone.Analysis on the relationship of osteoporosis and the disease on disc showed that the indices of osteoporosis were negatively correlated with the indices of the degeneration of intervertebral discs but the expression of collagen type X was positively correlated,with the density of vertebral body bones having the strongest dependence on collagen type X.The maximum stress and strain bore no correlation with the degeneration of intervertebral discs.These results suggest that osteoporosis was negatively correlated with the degeneration of intervertebral discs.

Objective:To explore the application effect of modified direct observation of procedural skills (DOPS) as a formative assessment tool in clinical skills training of professional graduate students.Methods:A total of 130 professional graduate students of Batch 2019 were selected as the experimental group, and 127 graduate students of Batch 2018 were selected as the control group. Two groups of students received clinical general skills training after enrollment, the control group adopted the traditional skills teaching method, and the experimental group added DOPS as formative assessment on the basis of traditional teaching. The teaching effect of DOPS was evaluated by means of scores analysis and student self-assessment. SPSS 23.0 was used for t-test. Results:The score of the experimental group (84.35±3.41) was higher than that of the control group (77.58±2.68), which showed a statistically significant difference ( t=2.63, P<0.05). The scores of "skill operation ability" and "communication ability" were the lowest single indexes in the assessment of DOPS. The results of self-assessment showed that the scores of autonomous learning ability, clinical thinking ability, clinical practice ability and professional accomplishment of students in the experimental group were all higher than those in the control group ( P<0.05). Conclusion:Modified DOPS is helpful to improve clinical core ability, which is worth promoting for application.