BACKGROUND:Previous researches have focused on the effect of phosphorus compounds on stem cels from animals or from human. But there is no study on the effect of phosphorus ions on human bone marrow mesenchymal stem cels under three-dimensional culture. OBJECTIVE:To explore the effect of phosphorus ions on human bone marrow mesenchymal stem cels under three-dimensional culture. METHODS:There were six groups in the experiment. Human bone marrow mesenchymal stem cels were inoculated in three-dimensional polystyrene scaffolds and then subjected to serum-free growth medium (group 3-GM) or serum-free growth medium containing 4 mmol/L (group 3-4P), 8 mmol/L (group 3-8P) phosphorus ions for 21 days, respectively. Cels cultured on the two-dimensional polystyrene scaffolds were used as control groups (groups 2-GM, 2-4P, 2-8P). Celular proliferation was examined by cel counting kit-8; the mRNA expressions of osteogenic marker genes were assessed by RT-PCR; the formation of mineralized nodules for the osteogenic differentiation of human bone marrow mesenchymal stem cels was examined by Alizarin red staining. RESULTS AND CONCLUSION:Compared with the two-dimensional culture, the growth of human bone marrow mesenchymal stem cels induced by phosphorus ions were more obvious in the three-dimensional polystyrenes scaffolds at days 4, 7, 14 and 21 (P < 0.05). Compared with the group 3-GM, the mRNA expression of colagen type I in groups 3-4P and 3-8P increased more significantly at days 7 and 14 (P < 0.05); the mRNA expression of alkaline phosphatase in groups 3-4P and 3-8P increased more significantly at day 14 (P < 0.05); the mRNA expression of osteocalcin in groups 3-4P and 3-8P increased more significantly at days 14 and 21 (P < 0.05). Mineralized nodules were formed in groups 3-4P and 3-8P but not in group 3-GM at day 21. So we concluded that phosphorus ions can promote proliferation and osteogenic differentiation of human bone marrow mesenchymal stem cels in three-dimensional polystyrenes scaffolds. Compared with the two-dimensional cel culture, the promoting growth effect of phosphorus ions on human bone marrow mesenchymal stem cels in three dimensional polystyrenes scaffolds are more obvious.

Objective To study changes of serum IL-17 and IL-35 levels in patients with heart failure. Methods 60 patients with heart failure (observation group)were selected as research subjects.60 patients accord-ing to different severity were divided into acute period heart failure (34 cases)and stable stage heart failure (26 ca-ses);60 patients graded according to the NYHA standards were divided into 24 cases of heart failure with grade Ⅱ, 20 cases of grade Ⅲ ,16 cases of grade Ⅳ.According to the different primary diseases :expansion cardiomyopathy group (20 cases in group A),the coronary heart disease group (group B,24 cases),hypertensive heart disease group (group C,16 cases).During the same period,42 healthy elderly people in our hospital were selected as control group. The serum IL-17,IL-35 levels were tested,and the serum IL-17,IL-35 levels in patients with heart failure were ana-lyzed.Results Serum level of IL-17 in the observation group was higher than the control group,and the difference was significant [(15.61 ±4.02)pg/mL vs (9.49 ±3.96)pg/mL,t =9.018,P <0.01].Serum level of IL-35 in the observation group was significantly lower than that of the control group,and the difference was significant[(52.78 ± 4.29)pg/mL vs (61.49 ±4.81)pg/mL,t =11.963,P <0.01].The level of serum IL-17 in acute stage of patients with heart failure was higher than that of stable heart failure,and the difference was significant (t =6.278,P <0.01);IL-35 level in serum of patients with heart failure in acute phase was lower than that of stable heart failure,the difference was significant (t =9.529,P <0.01).With the increase in heart failure grade,serum IL-17 level showed a rising trend,and the differences among three groups had statistical differences (F =6.098,P <0.01);serum IL-35 level decreased,and the differences among three groups had statistical differences(F =8.978,P <0.01).The serum IL-17 level of A group was higher than that in B group and C group,there were significant differences (F =6.096, P <0.01),the serum IL-17 level between B group and C group had no statistical difference (t =0.172,P >0.05). The serum IL-35 level of A group was lower than that of B group and C group,there were significant differences (F =8.978,P <0.01),the serum IL-35 level between B group and C group had no statistical difference (t =0.208,P >0.05).Serum IL-17 and serum IL-35 level was negatively correlated (r =-0.429,P =0.009).Conclusion High expression of IL-17 in elderly patients with heart failure,while IL-35 decreased in elderly patients with heart failure, IL-17,IL-35 are closely related to the senile congestive heart failure and the severity of illness.Serum IL-17 is nega-tively correlated with the level of serum IL-35.

BACKGROUND:Someone regards that treatments such as root canal therapy and post-core restoration can increase the fracture probability of teeth. Can fiber reinforced composite post enhance the fracture resistance of the severe wedge-shaped defected premolar? Three-dimensional finite element can simplify complex dental systems into a model analyzed by computer, and conduct biomechanical research through the model analysis. OBJECTIVE:To analyze the stress distribution of sever wedge-shaped defected first premolar which restored by fiber reinforced composite post and composite resin. METHODS:We established the three-dimensional finite element models of severe wedge-shaped defected maxil ary first premolar before and after restoration with fiber reinforced composite post and composite resin. The maximum bite force was designed to 267 N that was applied at 45° angle. Then, we analyzed the distribution of maximum principal stress in finite element models. RESULTS AND CONCLUSION:The maximum principal stress was concentrated in the tip of defected region. After restoration, the distribution of maximum principal stress was similar to that of the normal premolar, and the tensile stress was distributed uniformly in the upper-central part of buccal root. It may be beneficial for improving fracture resistance ability of severe wedge-shaped-defect premolar by restoration with fiber reinforced composite post and composite resin.

Adult ; Aged ; Antineoplastic Combined Chemotherapy Protocols ; therapeutic use ; Female ; Ferritins ; blood ; Hemoglobins ; metabolism ; Humans ; Killer Cells, Natural ; L-Lactate Dehydrogenase ; blood ; Lymphoma, T-Cell ; blood ; drug therapy ; pathology ; Male ; Middle Aged ; Neoplasm Staging ; Nose Neoplasms ; blood ; drug therapy ; pathology ; Prognosis

BACKGROUND:Arthroscopy can observe the involutive relation of patelofemoral joint directly and dynamicaly, which can be used to judge whether the patelofemoral joint abnormalities can be completely corrected. OBJECTIVE:To analyze the clinical effect of lateral retinacular release and ligament reconstruction under arthroscope for patela recurrent dislocation. METHODS: A total of 58 patients diagnosed as having recurrent patelar dislocations were divided randomly into control and experimental groups, with 29 cases in each group. Patients in the control group received lateral retinacular release and ligament reconstruction under common operation and those in the experimental group received lateral retinacular release and ligament reconstruction under arthroscopy. RESULTS AND CONCLUSION:There was no significant difference in the Lysholm and Kujala scores before treatment in the two groups (P > 0.05), but at 12 months after treatment, the Lysholm and Kujala scores were both increased in the two groups, especialy in the treatment group (P < 0.05). No difference was found in the congruence angle and lateral patelofemoral angle with CT value at 30° of knee flexion (P > 0.05), and CT measurement values of the congruence angle and lateral patelofemoral angle were both decreased in the two groups, especialy in the experimental group, at 12 months after treatment. In addition, the operation time, healing time, and total effective rate were better in the experimental group than the control group (P < 0.05). These results indicate that the lateral retinacular release and ligament reconstruction under arthroscopy has a better effect on recurrent patelar dislocation.

BACKGROUND:With the development of surgical techniques and reconstruction material technology, joint replacement has also been widely used in the dislocation of the shoulder;especial y al kinds of custom-made or assembled prosthesis make replacement indications improved evidently. OBJECTIVE:To investigate the long-term effects of arthroscopy or arthroplasty for treating recurrent anterior dislocation of the shoulder joint with severe bone defects. METHODS:144 patients with recurrent anterior dislocation of the shoulder joint with severe bone defects were enrol ed in this study. They were divided into treatment group and control group based on a random drawing (n=72). The control group was given arthroscopic surgery, and the treatment group was subjected to arthroplasty. The 3 years of fol owed-up were done by telephone investigation and further consultation. Neer shoulder score, shoulder activity and complications were recorded.
RESULTS AND CONCLUSION:After 3-year fol owed-up, the excel ent and good rate of shoulder function was significantly higher in the treatment group (90%) than in the control group (81%) (P<0.05). The magnitude of the flexion in the 3-year fol owed-up was apparently increased, while the lateral margin external rotation was decreased, which showed significant differences after intragroup comparison (P<0.05). Simultaneously, the magnitude of the flexion and the lateral margin external rotation in the treatment group had statistical y significant differences compared to the control group in the 3-year fol owed-up (P<0.05). The complications of wound infection, shoulder dislocation, and implant loosening in the treatment group during fol ow-up were significantly lower than in the control group (P<0.05). These findings verified that compared with arthroscopic surgery, arthroplasty for treating recurrent anterior dislocation of the shoulder joint with severe bone defects in long-term fol ow-up can effectively restore shoulder function and range of motion, and it has few complications, thereby effectively rebuilds shoulder joint.

BACKGROUND:Traditionaly, non-surgical treatment was used to treat degenerative femoral intercondylar fossa impingement syndrome, but it can cause function loss of cruciate ligament, or knee instability. With the development of medical technology, more and more views believed that ligament damage and combined with other knee structural damage should receive surgery as soon as possible.
OBJECTIVE: To investigate the repair effect of knee arthroplasty for treating degenerative femoral intercondylar fossa impingement syndrome, and compare with AO cannulated screw fixation.
METHODS:A total of 72 patients with degenerative femoral intercondylar fossa impingement syndrome were equaly and randomly divided into treatment group and control group. Patients in the control group were treated with open AO cannulated screw fixation, and patients in the treatment group were subjected to knee arthroplasty. At 7 days after treatment, repair effect was evaluated. Before treatment and 7 days after treatment, knee function was assessed by using Lysholm knee Scoring Scale and the international knee documentation committee knee evaluation form. Al patients were folowed up for 6 months after treatment to investigate the occurrence of complications.
RESULTS AND CONCLUSION:The surgery was successfuly completed in al patients. At 7 days after treatment, the excelent and good rate was 94% in the treatment group and 75% in the control group. The excelent and good rate was significantly higher in the treatment group than in the control group (P < 0.05). Lysholm scores were significantly greater, but the international knee documentation committee knee evaluation form scores were significantly lower at 7 days after treatment compared with that before treatment in the treatment group (P < 0.05). Simultaneously, Lysholm scores and the international knee documentation committee knee evaluation form scores were significantly better in the treatment group than in the control group at 7 days after treatment (P < 0.05). During 6-month folow-up, wound infection, intra-articular infection, joint pain, and deep vein thrombosis were significantly less in the treatment group than in the control group (P < 0.05). These findings indicate that knee arthroplasty for degenerative femoral intercondylar fossa impingement syndrome can improve short-term efficacy, effectively restore knee function and reduce the incidence of postoperative complications.

Objective To investigate the suppressive effects of collagen from Cyanea nozakii on adjuvant induced arthritis inrat.Methods Rats with adjuvant arthritis received different do- ses of Cyanea nozakii collagen by intragastric administration for two weeks.Incidence and severity of arthritis were assessed by calculation of mean arthritis index,the concentrations of NO,MDA and activity of SOD in the serum were examined.Results Cyanea nozakii colla- gen at different doses could ameliorate the adjuvant induced arthritis,suppress the concen- trations of NO,MDA and increase the activity of SOD in the serum.Conclusion Cyanea noza- kii collagen has therapeutic efficacy in treatment of adjuvant arthritis rats,and the mecha- nism of Cyanea nozakii collagen is probably related to the antioxidation.

ObjectiveTo study the role of alpha smooth muscle actin (α-SMA) positive cells (pericytes)in early myocardial ischemia.MethodsThirty healthy female Wistar rats were randomly divided by body weight into normal control group and subcutaneous multi-point injection of isoprenaline(Isp) group.Five rats were anesthetized after 0,2,4,6,12,24 and 48 h in each group.Blood was taken in eyeballs and,serum was separated,heart was taken and fixed in 4％ paraformaldehyde solution.The myocardial enzymes [serum apartate aminotransferase ( AST ),lactate dehydrogenase (LDH),creatine kinase (CK),creatine kinase isoenzymes (CK-MB)] were determined by biochemical automatic analyzer,the expression of α-SMA and vimentin in myocardial tissue was detected by immunohistochemical staining and changes of pericytes in early myocardial ischemia was observed by morphometric analysis.ResultsThe level of myocardial enzymes AST[(160.25 ± 3.86),(172.60 ± 8.82),(192.20 ± 25.35)U/L],and LDH[(1466.25 ± 643.38),(1645.20 ± 326.83),(1701.60 ± 640.06)U/L],12,24 and 48 h after subcutaneous injection of Isp,were higher than that[(129.18 ± 19.65),(849.45 ± 248.54)U/L,all P ＜ 0.05] of the control group.The level of CK[(1097.60 ± 301.57),(1247.20 ± 243.84),(1263.75 ± 271.22),(1448.00 ± 647.00),(1268.40 ± 479.81)U/L],and CK-MB[(217.12 ± 35.89),(229.08 ± 97.11),(251.70 ± 46.82),(318.80 ±77.76),(249.04 ±:98.54)U/L],4,6,12,24 and 48 h after subcutaneous injection of Isp,were higher than that [(713.45 ± 146.30),(147.05 ± 25.75)U/L,all P ＜ 0.05] of the control group.The number of α-SMA positive cells(61.00 ± 17.25),4 h after Isp injection,was significantly increased compared with that(28.20 ± 5.81,18.20 ± 2.17) of 24 and 48 h after Isp injection.The number of α-SMA positive cells in 48 h group was less than that(50.00 ± 3.61,P ＜ 0.05) of 6 h group.The number of vimentin positive cells in 6,12,24,48 h groups (4.17 ± 2.49,5.24 ± 2.84,8.37 ± 2.18,7.73 ± 2.49) were higher than that(1.88 ± 1.85,2.21 ± 1.54) of the control group and 4 h group(all P ＜ 0.05).Compared with 24 and 48 h groups,the level of vimentin protein was increased in 6 and 12 h groups(P ＜ 0.05).ConclusionThe number of pericytes in early myocardial ischemia is higher than that of other mesenthymal cells,and pericytes may be the main effector cells in the generation and development of myocardial fibrosis.

OBJECTIVE: To investigate the expression of hyperpolarization-activated cyclic nucleotide-gated cation channel 4 (HCN4) and connexin43 (Cx43) in the sinoatrial node of electric shock death. METHODS: As experimental group, 34 cases of electric shock death who had definite current mark evidence were selected from pathology department of Xuzhou Medical College from 2010 to 2013. As the control group, 20 cases of fatal severe craniocerebral injury in traffic accidents were chosen. The expressions of HCN4 and Cx43 in the sinoatrial node were observed by immunohistochemical technology. RESULTS: HCN4 positive cells expressed in the cell membrane and cytoplasm of the sinoatrial node. Cx43 positive cells expressed in the cell membrane and cytoplasm of T cells and myocardial cells. The expression of HCN4 was significantly higher than that of the control group (P < 0.05) and the expression of Cx43 was significantly lower than that of the control group (P < 0.05). CONCLUSION The changes of HCN4 and Cx43 expressions in the sinoatrial node illustrate electric shock death might be related to the abnormalities of cardiac electrophysiology and conduction.
Connexin 43/metabolism* ; Cyclic Nucleotide-Gated Cation Channels ; Heart Rate ; Hyperpolarization-Activated Cyclic Nucleotide-Gated Channels/metabolism* ; Immunohistochemistry/methods* ; Myocardium/metabolism* ; Myocytes, Cardiac ; Sinoatrial Node/physiopathology*