ObjectiveTo study the effect of salmon calcitonin in treating knee osteoarthritis.MethodsFortyeight cases of knee osteoarthritis were randomly divided into four groups,twelve cases each group.A group:acetaminophen+glucosamine hydrochloride,B group:meloxicam+glucosamine hydrochloride,C group:salmon calcitonin + glucosamine hydrochloride,D group:salmon calcitonin.Acetaminophen and meloxicam can stop as pain symptoms disappeared.Other drugs were treated for 12 weeks.A follow up was carried out to compare visual analogue score and 12-item short form health survey.ResultsTwelve weeks later,A,B,C,D four groups' visual analogue score decreased from before treatment 5.6±1.2,5.5±1.2,5.4±1.0,5.1±l.2 to 1.9±0.8,1.2±0.7,0.8±0.6,0.9±0.7,12-item short form health survey score from before treatment - 23.4±3.1,- 23.8±3.0,-24.8 ±3.8,-22.4±2.8 to -15.1±4.7、- 14.5±4.7,-9.3±6.2,-10.2±5.3.There was significant difference before and after treatment in every group(P＜ 0.05).The visual analogue scores of B,C and D group outweigh A group's (P＜ 0.05).A and B groups'scores of 12-item short form health survey were lower to C and D groups' ( P ＜ 0.05 ).ConclusionsSalmon calcitonin can relieve pain in treating knee osteoarthritis.

[Objective]To compare the osteoinductive activity of calcium sulfate(CS),allogenetic demineralized bone materials(ADBM) and heterogenetic demineralized bone materials(HDBM) by observing their efficiency in inducing bone formation.[Method]CS,ADBM and HDBM were transplanted into thigh muscle pouches of mice.Thirty-six mature Sprague-Dawly mice were divided into 2 groups at random.CS was transplanted into the left(group A 1,n=9) and ADBM into the right(group A2,n=9) thigh muscle pouches.HDBM was transplanted into the left thigh muscle pouches(group B 1,n=9) and the right sites were taken as blank controls(group B2,n=9).Experiments were done to induce ectopic bone formation.At 2,4,6 weeks postoperatively,specimen were collected to evaluate gross and tissue structures and biochemical tests for alkaline phosphatase(ALP) and Ca2+ so that osteoinductive activities of different bone graft materials could be assessed.[Result]At 2 weeks postoperativly,ADBM and HDBM were wrapped up by fibrous tissues and stromal cells gathering around the DBM slices.At 4 weeks postoperativly,formation of cartilage and osteoblasts were observed,and at 6 weeks,materials like cartilage matrix were observed to grow.The concentration of ALP and Ca2+ in study groups was higher than that of control group,which meant that 2 types of DBM had osteogenic potential and that the differences of osteogenetie potential in ADBM and HDBM relied on the donors,whereas CS could be degraded and absorbed fast with light inflammatory reaction and no ectopic bone formation was observed in CS graft.[Conclusion]Both ADBM and HDBM have osteoinductive potential.ADBM is better in inducing ectopic bone formation than HDBM.Differences in donors and preparation of ADBM and HDBM have impacts on their abilities of inducing ectopic bone formation.CS is good at biocompatibility and could be used as bulking agents to repair bone defects.

Objective To evaluate the relationship between the risk of breast cancer and abortions among nulliparous women. Methods Searched the data of Cochrane Library and PubMed before June 2014 to identify potentially studies which involved the relationship between the risk of breast cancer and abortions among nulliparous women. Data was extracted by two independent authors from each study. STATA software was used for statistical analysis. Calculated the pooled RR and 95% CI as the assessment of the link between abortions and breast cancer in fixed effects models. Results 13 studies were included. The study showed the RR and 95%CI of the relationship between the risk of breast cancer and abortions was 0. 98[0. 89,1. 08],P>0. 05 in nulliparous women, and the number of abortions was not associated with the risk of breast cancer. The RR and 95%CI of the relationship between the risk of breast cancer and induced abortions or spontaneous abor-tions were 0. 96[0. 88,1. 04],1. 01[0. 88,1. 14], respectively. Conclusion There is no correlation between breast cancer and abortions a-mong the nulliparous women, and the risk of breast cancer would not increas as the number of abortions increase.

Objective To investigate the clinical outcomes of different managements of complete rupture of the deltoid ligament associated with supination-external rotation ankle fracture.Methods From January 2010 to June 2014,33 cases of complete rupture of the deltoid ligament associated with supination-external rotation ankle fracture were treated with open reduction and internal fixation.According to the different managements of the complete rupture of the deltoid ligament,the patients were divided into 4 groups:9 cases in the non-repair group,7 cases in the superficial layer repair group,9 cases in the deep layer repair group,and 8 cases in the complete repair group.All the patients took anteroposterior,lateral and gravity stress radiographs preoperatively and postoperatively.The 4 groups were compatible in preoperative general data (P ＞ 0.05).The 4 groups were compared in terms of operation time,medial clear space and American Orthopaedic Foot and Ankle Society (AOFAS) ankle-hindfoot score.Results All the patients were followed up for 6 to 18 months (average,13.7 months).All wounds healed at the first stage without any infection.All fractures united primarily after 3 to 9 months (average,4.7 months).The operation time for the superficial layer repair group was significantly longer than for the non-repair group,but significantly shorter than for the deep layer repair and the complete repair groups (P ＜ 0.05).In gravity stress radiographs,there was no significant difference in medial clear space among the 4 groups (P ＞ 0.05),but there were significant differences before and after operation in the 4 groups (P ＜ 0.05).The postoperative AOFAS ankle-hindfoot score in the repair groups was significantly higher than in the non-repair group and the superficial layer repair group(P ＜ 0.05).Conclusion To achieve satisfactory outcomes for patients with complete rupture of the deltoid ligament associated with supination-external rotation ankle fractures,anatomic open reduction and rigid internal fixation is necessary,and repair of the deltoid ligament,especially its superficial layer,is a valuable contribution.

BACKGROUND:Ti6Al4V is a titanium aloy that is widely used in human joint replacement, but its modulus of elasticity is greater than human bone, resulting in the bad stability of the prosthesis. Ti35Nb3Zr2Ta, a new βtitanium aloy, has a lower modulus of elasticity, and maybe becomes a new-generation human joint prosthesis material that has a better biocompatibility. OBJECTIVE:To study the biocompatibility of Ti35Nb3Zr2Ta in prosthesis. METHODS:Wanfang, CNKI and PubMed databases were retrieved using a computer with “new β titanium;prosthesis; biocompatible” as keywords, and the retrieval time ranged from 2010 to 2015. Articles focusing on current application status for medical prosthesis materials and the biocompatibility of Ti35Nb3Zr2Ta in prosthesis were selected. RESULTS AND CONCLUSION:Compared with Ti6Al4V, Ti35Nb3Zr2Ta has higher surface roughness and smaler surface contact angle; the alkaline phosphatase activity and amount of calcium deposits in osteoblasts cultured at Ti35Nb3Zr2Ta is significantly higher than that at Ti6Al4V. Ti35Nb3Zr2Ta has good biocompatibility, and can be considered to be widely used as joint prosthesis material further.

ObjectiveTo modify the technique of whole small bowel transplantation in rats to improve the survival.MethodsOne hundred and six SD rats served as donors and recipients to establish a homogeneous and orthotopic model of small bowel transplantation without fistula.Anastomosis of aorta and vein was done with three- cuff technique,the vena mesenterica superior of recipient was done under a surgical microscope.End-to-end anastomosis was performed between donor proximal small intestine and receptor jejunum,and also between the remote and receptor ascending colon.Surviving more than 3 days after surgery was defined as the operation was successful.ResultsThe operation was successfully carried out in 48 cases with the survival rate of 90.6％ (48/53).The average warm ischemic time was 0 minute,and the average cold ischemic time was(30 ±2.48)min.The survival rate( ＞7 d) was 97.9％ (47/48).ConclusionsOn the basis of three-cuff technique,the survival of SBT was greatly improved.When the vena mesenterica superior of recipient was done under a surgical microscope,the surgical training time was shortened.

Objective To develop a novel endoscopic classification system to determine the invasion depth of early esophageal cancer.Methods The esophageal lesion was endoscopicaUy stained with Lugol's iodine first,then methylene blue.According to the growth pattern,height and cup depth under endoscope,the lesions were classified into 5 types,including surface diffusion growth,intra-lumen growth,intra-wall growth,bi-direction growth and mix growth types.The lesions were then removed by endoscopic mucosa reection or surgery,the precise invasion depth of the lesion was determined pathologically and the results were compared with the endoscopy classification.Results The data of 44 cases of esophageal mucosal cancer and 34 cases of esophageal sub-mueosal cancer were included.With the criteria of mucosal cancer as surface diffusion growth,intra-lumen growth <5mm,bi-direetion growth <2mm and intra-wall growth <0.5 mm,the diagnostic specificity was 89.1%(41/46) and sensitivity was 93.2%(41/44).With the criteria of submucosal cancer as intra-lumen growth≥5 mm,hi-direction growth≥2mm,intra-wall growth≥0.5 mm and mix growth type,the diagnostic specificity was 90.6%(29/32) and sensitivity was 85.3%(29/34).The overall diagnostic accuracy in differentiating esophageal mucosal cancer from esophageal submueosal cancer by endoscopic classification was 89.7%(70/78).Conclusion This endoscopic classification system is effective in differentiating esophageal mucosal cancer from submucosal ones.

AIM: To investigate alteration of functional receptors for urotensin II in pressure overload-induced cardiac hypertrophy of rats. METHODS: In the rat cardiac hypertrophy model produced by constriction of the abdominal aorta, urotensin II binding sites in myocardial sarcolemma were determined with radioligand assay first day (early group) and 30th day (late group) after operation. RESULTS: Compared with control and sham group, in the early group，the blood pressure increased 54% and 43% respectively(P＜0.01),and heart/body weight ratio unchanged(P＞0.05),UII receptors were up-regulated by 184% and 159%(P＜0.01)respectively, While the affinity to UII was decreased (Kd increased 224% and 206 respectively,P＜0.01).In the late group, the blood pressure increased 85% and 67% (P＜0.01), and heart/body weight ratio increased 18% and 22% (P＜0.05) respectively，than that of control and sham group. UII receptors were down-regulated by 35% and 41%(P＜0.05) respectively while the affinity to UII was increased (Kd decreased 30% and 33% respectively, P＜0.05). CONCLUSION: The biphasic changes of UII receptor in myocardial sarcolemma induced by pressure-overload were observed,increasing in early stage, while decreasing in late stage, and these changes were involved in the development of cardiac hypertrophy.

Objective: To study the effect of urotensin(U Ⅱ) on nitric oxide synthase(NOS)/nitric oxide(NO) system in rat aorta. Methods: The aortic slices were incubated in vitro. The medium nitrite content, vascular NOS activities and cGMP content were measured. Results: After incubation of aorta for 1.5－3.0 h, UⅡ(10－9－10－7　mol*L－1) increased nitrite production ( 14.8%－80.9%, P<0.01) in dose-dependent manner. U Ⅱ significantly stimulated the total NOS activities, mainly activated constitutive NOS (P<0.05 or P<0.01), however, the inducible NOS activities were not altered (P>0.05). Incubation of aortic slices with U Ⅱ (10－9－10－7 mol*L－1) increased vascular cGMP content in dose-dependent manner. Co-incubation vascular tissue with U Ⅱ and　GN-L-nitro-arginine, an inhibitor of NOS, obviously inhibited the U Ⅱ-induced NOS activation, NO production and cGMP formation. Conclusion: The results suggest that U Ⅱ can activate the vascular NOS/NO pathway, increasing tissue NO production and cGMP content.

AIM　To investigate effect of urotensin Ⅱ (UⅡ)on proliferation of aort a smooth muscle cells （ASMC）of rat and study the signal transduction pathway o f it. METHODS　In cultured ASMC of rat, UⅡ was used to stimulate proliferation of these cells and levels of ［3H］-TdR incorporation were used to evaluate the speed of DNA synthesis, and different inhibitors were used to s tudy the action of different signal transduction pathway of mitogenic effect of UⅡ on VSMC. RESULTS　1×10-9～1×10-7 mol*L- 1 UⅡ caused marked concentration-dependent increasing of ［3H］-TdR i ncor poration of ASMC. ［3H］-TdR incorporation of 1×10-9,1×10-8 and 1×10-7 mol*L-1 UⅡ were 22%（P<0.05）, 57%（P<0.01）and 65%（P<0.01）higher than control. Nicardipine, H7, W7 and PD98059 , which are inhibitors of calcium channel, PKC, CaM-PK and MAPK respectively, inhibited the effects of UⅡ obviously, with the inhibitory rate by 55%（P< 0.01）, 27%（P<0.01）,18%（P<0.05）and 16%（P<0.05）respectively . CONCLUSION　UⅡ is a strong mitogen for VSMC and the mitogenic e ffect of UⅡ is probably mediated by Ca2+, PKC, CaM-PK and MAPK signal tr ansduction pathway.