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Objective:To explore the effects of Alpha-2-macroglobulin-rich serum (A2MRS) on knee post-traumatic osteoarthritis (PTOA).Methods:The knee PTOA models were constructed by transection of the anterior cruciate ligament (ACL) in 80 SD male rats, aged 2 months and weighing from 250 to 300 g, which were randomized into 4 groups ( n=20): a high dose group (A2MRS containing 20 μg/μL A2M administered), a low dose group (A2MRS containing 10 μg/μL A2M administered), a positive control group (normal saline administered), and a blank control group (the knee joint cut pseudooperatively and normal saline administered). HE, toluidine blue staining, safranine O staining, modified Mankin scoring and Osteoarthritis Research Society International (OARSI) scoring were conducted to evaluate and compare the therapeutic effects of A2MRS on the knee PTOA among the 4 groups. Results:The rat cartilage was thinner with patchy and cracked surface, and the chondrocytes were reduced and distributed unevenly in the positive control group, compared with the blank control group. The modified Mankin score (3.89±0.93) and OARSI score (10.05±0.72) in the positive control group were significantly higher than those in the blank control group (0.67±0.07 and 3.10±0.29) ( P<0.05). The rat cartilage was thicker with basically complete and crack-free surface, and the chondrocytes were increased and distributed more evenly in the high dose group and the low dose group, compared with the positive control group. The modified Mankin scores (1.33±0.50 and 1.56±0.53) and OARSI scores (6.30±0.64 and 4.75±0.66) in the high dose group and the low dose group were significantly lower than those in the positive control group ( P<0.05). However, there were no such differences between the high dose group and the low dose group ( P>0.05). Conclusion:A2MRS effectively delays the pathological process of knee PTOA.
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Objective:To compare the efficacy of augmentation suture and direct suture in treatment of acute Achilles tendon ruptures so as to provide evidences for the selection of surgical methods.Methods:A systematic search was conducted in PubMed, Web of Science, EMBASE, CNKI and Wanfang database for studies of augmentation suture versus direct suture of acute Achilles tendon ruptures. Literatures were retrieved from January 1990 to January 2019. Literatures were screened according to the pre-set inclusion and exclusion criteria, and the rating of included literature was strictly evaluated by the Cochrane System Evaluation Manual and Newcastle-Ottawa scale (NOS). The relevant data were analyzed using RevMan 5.3 to compare patient satisfaction, rerupture rate, infection rate, ankle's range of motion and other complications (postoperative calf atrophy, plantar flexion, plantar flexion strength).Results:Eight articles involving 558 patients were identified including 273 patients in augmentation suture group and 285 patients in direct suture group. There were no significant differences between two groups in aspects of patient satisfaction ( OR=1.00, 95% CI 0.54-1.84, P>0.05), rerupture rate ( OR=0.75, 95% CI 0.34-1.66, P>0.05), infection rate ( OR=1.73, 95% CI 0.76-3.94, P>0.05), ankle's range of motion ( OR=0.97, 95% CI 0.33-2.87, P>0.05) and other complications rate ( OR=1.93, 95% CI 0.91-4.09, P>0.05). Meantime, the two groups showed similar effect on postoperative calf atrophy and average isokinetic calf muscle strength ( P>0.05). There was a significant difference in plantar flexion of injured limbs after augmentation suture( P<0.05). Conclusion:Compared with direct suture, augmentation suture cannot improve patient satisfaction or reduce complication rate in repair of acute Achilles tendon ruptures.
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Objective:To investigate the short-term effects of articular injection of hyaluronic acid combined with glucocorticoid in patients with knee osteoarthritis.Methods:From October 2017 to June 2018, a total of 188 patients diagnosed with knee osteoarthritis received parallel articular injection. There were 60 cases with mild knee osteoarthritis, 72 with moderate and 56 with severe according to the WOMAC knee functional score. There patients were divided into group rank Ⅰ48 cases, Ⅱ 49 cases, Ⅲ 45 cases, Ⅳ 46 cases according to the knee joint X-ray Kellgren-Lawrence classification. The unified treatment regimen was 2.5 ml Sodium Hyaluronate (SHA) injection for the first time, SHA 2.5 ml and compound betamethasone injection (CBI) 1 ml for the second week, and 2.5 ml of SHA for the third week. WOMAC score and Lequesne index were used to evaluate joint function before the first injection and after SHA and SHA+CBI injection. The improvement rate of Lequesne index ≥30% or improvement rate of WOMAC score ≥25% was regarded as effective treatment.Results:Lequesne index and WOMAC score decreased gradually in the mild, moderate and severe groups after 3 weeks of injection. Among these patients, the improvement rates of Lequesne index after SHA injection and SHA+CBI injection were 36.44%±8.46% and 49.26%±13.75% in the mild group, 23.09%±12.61% and 30.66%±14.95% in the moderate group, and 10.50%±8.78% and 11.07%±6.52% in the severe group. The improvement rate of WOMAC score in the mild group after SHA injection and after SHA+CBI injection was greater than 25%. After SHA injection, the improvement rate of WOMAC score was 13.06%±10.21% in the moderate group, and 27.49%±13.61% after SHA+CBI injection. Those in severe group were all less than 25%. Kendall's staub correlation analysis results showed that there was a strong positive correlation between WOMAC function score and X-ray Kellgren-Lawrence classification ( r=0.744, P<0.001). The Lequesne index and WOMAC scores of the Kellgren-Lawrence X-ray classification decreased gradually after 3 weeks of injection. The improvement rate of Lequesne index period in group rank Ⅰ after SHA and SHA+CBI injection was 36.64%±10.05% and 52.00%±8.19%, respectively. That for group rank Ⅱ was 32.05%±8.09% and 41.95%±10.53%, group rank Ⅲ 16.93%±10.34% and 27.77%±10.25%, group rank Ⅳ 7.52%±5.53% and 7.60%±6.66%. The improvement rate of WOMAC score period in group rank Ⅰ after SHA and SHA+CBI injection was 29.48%±11.77% and 42.59%±13.55%, respectively. That for group rank Ⅱ was 26.72%±10.21% and 30.49%±16.90%, group rank Ⅲ 13.78%±5.96% and 23.05%±9.52%, group rank Ⅳ 4.77%±3.80% and 4.27%±4.23%. Conclusion:For mild or X-ray classification Ⅰ, Ⅱ knee osteoarthritis patients, articular injection SHA or SHA+CBI are effective. Further, SHA+CBI is better than single injection of SHA. SHA+CBI injection was effective for moderate knee osteoarthritis patients. For severe or X-ray classification Ⅲ, Ⅳ patients, SHA or SHA+CBI injection at interval are invalid.
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Objective To observe the changes of chondrocytes ultrastructure and the volume of type Ⅱ collagen in post-traumatic osteoarthritis through cartilage injury models of the femoral trochlea of rabbit.Methods The different cartilage injury models of the femoral trochlea of rabbit in vivo was made by impacting of different times.Rabbits were killed at each of the following intervals:1 week,4 weeks,8 weeks after impacting injury.The ultrastructures of the chondrocytes were observed by transmission electron microscope (TEM).The changes of type Ⅱ collagen in cartilage tissue were detected by immunohistochemistry and in-situ hybridization.A two-way classification ANOVA for factorial design was used for statistical analysis.P values of ＜0.05 were considered statistically significant.Results One week,changes of chondrocyte in experimental group were limit.4 weeks,Chondrocyte in experimental group was occurrent a series of changes:karyopycnosis,karyolysis、rough endoplasmic reticulum (RER) broaden,mitochondrion swelling,lysosome appear,cell membrane rupture,and so on.Immunohistochemical results showed that the matrix around chondrocytes and the trapped collagen Ⅱ gradually became lighter at 4 weeks,and the gray values of the 20 hits group and the 40 hits group were all higher than those of the control group,the difference was statistically significant (F=9.58,P＜0.05,P＜0.01).In situ tests showed the same results,the positive cells were distributed in the middle and lower part and deep layer of the shape shifting layer,with light staining at 4 weeks.The gray value of the 20 hits group and the 40 hits group was higher than that of the control group,and the difference was statistically significant (F=8.64,P＜0.05,P＜0.01).Immunohistochemical results showed that a large amount of fibrous tissue appeared in the matrix around chondrocytes,with low collagen type Ⅱ content and generally no staining at 8 weeks.The staining gray value of collagen type Ⅱ expression in the 20 hits group and the 40 hits group was higher than that in the control group,and the difference was statistically significant (F=9.02,P＜ 0.01,P＜0.01).In situ tests showed the same results,chondrocyte necrosis was severe,and hardly any cells with positive staining were observed.The gray value of the 20 hits group and the 40 hits group was higher than that of the control group,and the difference was statistically significant (F=8.32,P＜0.01,P＜0.01).Conclusion Impact lead to cvartilage maxtrix injury and chondrocyte death,pathological changes of articular cartilage were severity with time lasting,pathological changes of articular cartilage were severity with impact times increase,Stop impact,pathological changes of articular cartilage were development.
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Objective To compare the efficacy and safety between minimally invasive plate osteosynthesis (MIPO) and open reduction and internal fixation (ORIF) in the treatment of humeral shaft fracture.Methods Case-control studies and randomized clinical trials comparing MIPO with ORIF in the treatment of humeral shaft fracture from January 2010 to June 2018 were retrieved from PubMed Library,Cochrane Library,Embase Library,China National Knowledge Internet and Wanfang Data.Methodological quality of the studies and trials was critically assessed.REVMANS.3 was used for data analysis.The 2 groups of patients were compared in terms of University of California,Los Angeles shoulder rating scale (UCLA),Mayo Elbow Performance Score (MEPS),union time,nonunion rate and complications.Results A total of 452 patients from 9 articles were included.There were 216 cases in the MIPO group and 236 ones in the ORIF group.The Meta analyses showed that the MIPO group had a significantly higher UCLA score (WMD =0.36,P=0.03),significantly lower incidences of complications (OR =-0.15,P ＜ 0.05) and iatrogenie radial nerve palsy (OR =0.24,P ＜ 0.05),and significantly shorter union time (SMD =-0.36,P =0.02) than the ORIF group.There were no significant differences between the 2 groups in MEPS (WMD =-0.48,P =0.43) or nonunion rate (OR =0.45,P =0.11).Conclusion MIPO may be a better choice for humeral shaft fracture than ORIF in regards to postoperative shoulder functions,union time,and incidences of complications and iatrogenic radial nerve palsy.
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Objective To study the association between the expression of periostin and the occurrence and progression of knee osteoarthritis (OA) in synovial fluid.Methods The expression level of periostin in the synovial fluid of healthy people and patients with different stages of OA was tested.Furthermore,60 surgical-induced OA rat model were divided into two groups,the sham operation group had only implemented slit suture,and the OA model group had one side anterior cruciate ligament transected.The expression of periostin in intra-articular injection samples were analyzed at 1,2,4,8,12 week.Fluorescence molecular tomography (FMT) were performed after surgery at 4,8,12 week on the surgery knee.Gross morphologic lesions on the tibial plateau in rats were visualized by India ink staining,toluidine blue staining,cartilage permeation test.The synovium were visualized by HE staining and periostin were detected by immunohistoc hemistry.The measurement data were compared by one factor analysis of variance test.Results The expression of periostin in cartilage was lower in late-stage OA than the one from normal and early-stage OA (F=13.95,P＜0.01).The FMT showed that there was no obvious change in the extent of chronic inflammation in the sham operation group,and the chronic inflammatory degree of the OA model group gradually increased as time went on.Toluidine blue staining and cartilage permeation test showed that the cartilage degeneration in rat model of OA became more and more serious with time.There was no stastically significant difference of the periostin in control groutp at different time stage (F=0.67,P=0.53).The periostin in the intra-articular increased at first and then decreased with the development of OA (F=11.0,P＜0.05).HE staining of synovial tissue showed that the degree of synovial hyperplasia was consistent with the degree of degeneration of joints.With the extension of time,the expression of periostin in synovial tissue increased gradually.Conclusion The expression of periostin in human synovial fluid is low in normal knee joint,increases in early and middle stages,and decreases in late stage.The rat model indicates that the expression of periostin increases first and then decreases with the development of OA,but the expression in synovium increases gradually with the development of OA.The increased expression of periostin in synovial fluid may serve as an early diagnostic marker for OA and downregulation of the periostin may be a start marker for the late OA.
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Objective To observe the changes in cytoskeleton (CSK) and glycosaminoglycan (GAG) synthesis following passage culture of articular chondrocytes and the correlation between CSK and GAG.Methods Eight male New Zealand White rabbits (8-month-old) were sacrificed by air embolism.After the chondrocytes from their knee joints were isolated by enzymolysis method,monolayer culture was performed.The chondrocytes of primary passage (P0) and passages 1 & 2 (P1,P2) were inoculated into 24-well plates with round cover slips put at the bottoms.Cell climbing slices were fixed after attachment of chondrocytes.The CSK proteins,actin,vimentin,tubulin and vinculin were stained by immuuofluorescence antibody on P0,P1 and P2 cell climbing slices,respectively.The CSK morphology was observed by laser confocal scanning microscopy and the fluorescence intensities of CSK proteins were detected by the fluorescence intensity software.The medium was changed for each generation after cell fusion and the GAG concentrations in the supernatants were measured at 24,36,48,60 h after medium change by alcian blue method.Results The intermediate filament networks became loosen and the dense distributions surrounding the nucleus decreased;more microtubule processes formed at the cell periphery with passage.The fluorescence intensity of actin of P1 chondrocytes was significantly increased than that of P0 (P ＜ 0.05),but there were no such significant differences between P0 and P2 or between P1 and P2 (P ＞ 0.05).The fluorescence intensities of vimentin and tubulin were significantly decreased with passage respectively,and there were such significant differences between any two of P0,P1 and P2 (P ＜ 0.05).The GAG concentrations in the supernatants were significantly decreased with passage at each time point,and there were such significant differences between any two of P0,P1 and P2 (P ＜ 0.05).Conclusions Passage culture of articular chondrocytes may lead to changes in morphology and protein expression intensity of the main components of CSK,and accordingly to decreased synthesis amount of GAG,one of the extracellular matrix of chondrocytes,indicating the changed characteristics of chondrocytes after passage and a certain correlation between CSK and GAG.
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Objective We performed comprehensive proteomic analyses of synovial fluid by using the isobaric tags for relative and absolute quantitation (iTRAQ) method and LC-MS/MS, and searched for candidate biomarkers for osteoarthritis. Methods Synovial fluid was collected from patients with late-stage OA, earlystage OA and the control group. Molecular variations were detected by the iTRAQ method. T test was used for statistical analysis. Results Using the iTRAQ method, we identified 1 283 proteins from synovial fluid of patients with osteoarthritis, of which 268 proteins were not reported previously. There were 72 proteins upregulated and 249 proteins down-regulated between moderate OA group and controls. One hundred and twentyeight proteins were up-regulated and 141 proteins were down-regulated between severe OA group and controls.One hundred and ninety-two proteins were up-regulated and 76 proteins were down-regulated between severe OA group and moderate OA group. Eight proteins were found to be up-regulated in the three groups.Conclusion This is an in-depth analysis of the synovial fluid proteome from patients with osteoarthritis by iTRAQ method. The catalog of proteins generated in this study will further expand our knowledge regarding the pathophysiology of osteoarthritis and help us in identifying good biomarkers for early diagnosis.
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Objective We performed comprehensive proteomic analyses of synovial fluid by using the isobaric tags for relative and absolute quantitation (iTRAQ) method and LC-MS/MS, and searched for candidate biomarkers for osteoarthritis. Methods Synovial fluid was collected from patients with late-stage OA, earlystage OA and the control group. Molecular variations were detected by the iTRAQ method. T test was used for statistical analysis. Results Using the iTRAQ method, we identified 1 283 proteins from synovial fluid of patients with osteoarthritis, of which 268 proteins were not reported previously. There were 72 proteins upregulated and 249 proteins down-regulated between moderate OA group and controls. One hundred and twentyeight proteins were up-regulated and 141 proteins were down-regulated between severe OA group and controls.One hundred and ninety-two proteins were up-regulated and 76 proteins were down-regulated between severe OA group and moderate OA group. Eight proteins were found to be up-regulated in the three groups.Conclusion This is an in-depth analysis of the synovial fluid proteome from patients with osteoarthritis by iTRAQ method. The catalog of proteins generated in this study will further expand our knowledge regarding the pathophysiology of osteoarthritis and help us in identifying good biomarkers for early diagnosis.
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Objective To explore the relationship among the expression level of MMP?13, AGG and Col?II in the chon?drocytes caused by nutritional deficiencies in rabbits. Methods 30 New Zealand white rabbits were randomly divided into autolo?gous chondrocyte transplantation group (control group, n=10), nutrition block group (surgery group, n=10), and peripheral nutrition block group (sham surgery group, n=10). 4 weeks after treatment, the rabbits were sacrificed for undergoing the observations on general and histological level;real?time PCR assay was employed for testing the expression level of MMP?13, AGG and Col?II;cel?lular apoptosis percentage was observed through TUNEL stain. The relationship among the apoptosis level, cartilage cells histologi?cal Mankin score as well as the expression level of MMP?13, AGG and Col?II were analyzed. Results Based on the Mankin score, there was a statistic difference between surgery group and control group. On the other side, there were no statistic differenc?es between sham surgery group and control group. 4 weeks after treatment, surgery group presented a higher apoptotic percentage compared with control group;this value between sham surgery group and control showed no significant differences. There was an increased mRNA expression level of MMP?13 and a decreased mRNA expression level of AGG and Col?II in surgery group com?pared with control group;no statistic differences of all these values was found between sham surgery group and control group. His?tological Mankin score and apoptotic percentage presented positive correlation (r=0.922, P<0.001), the regression equation:Y=-0.548+0.404X, R2=0.844 (F=157.735, P<0.001); the mRNA expression level of MMP?13 and apoptotic percentage presented positive correlation (r=0.942, P<0.001), the regression equation:Y=0.951+0.116X, R2=0.883 (F=219.054, P<0.001). There was a nega?tive correlation between the mRNA expression level of MMP?13 and the mRNA expression level of AGG as well as Col?II (r=-0.956,-0.945, P<0.001). Conclusion Damage of cartilage cells causes the up?regulation of the MMP?13 expression which could ex?acerbate the degeneration of cells. It could induce the down?regulation of AGG and Col?II mRNA expression, which will cause the extracellular matrix synthesis disorder.
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Knee osteoarthritis (KOA) is the most common knee joint disease. Although KOA belongs to a disease of degeneration of knee joint cartilage, its pathology involves cartilage, subchondral bone, meniscus, synovial membrane, articular capsule and other joint tissue. The infrapatellar fat pad (IPFP), an intracapsular but extrasynovial structure, has some special characteristics of endocrine metabolism, then it has double roles in the development of KOA, but its protective effect is much more than harmful effect. Considering protective roles of IPFP in KOA and some serious complications after IPFP resection, the surgeon shall protect IPFP as far as possible if total knee arthroplasty surgical field is good. If it is necessary to improve the surgical field, its fibrotic tissue even all part can be removed.
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Humans , Adipose Tissue , Physiology , Arthroplasty, Replacement, Knee , Knee Joint , General Surgery , Osteoarthritis, Knee , General SurgeryABSTRACT
Objective To explore the histological properties of isolated chondrons and chondrocytes from rabbit knee cartilage,and to determine if these properties vary with age.Methods Three groups of rabbit knees were evaluated according to different age:(1) young (2 months,n=10);(2) adult (8 months,n=10);and (3) old (31 months,n=10).The cartilage structure,proteoglycan,collagen-2,and collagen-6 content were determined by light microscopic using hematoxylin-eosin (HE),Toluidine Blue,and col-2,6 staining.The chondrons were enzymatically isolated using 0.3 g/L dispase and 0.2 g/L collagenase-2 by shaking for 3 hours.The morphology and composition of isolated chondrons were observed by HE and collagen-6 immunostaining staining after overnight coverslip monolayer culture under a microscopy.Results The chondrocytes became sparser and the total content of proteoglycans and collagen-2 were decreased in the articular cartilage with age.Compared to the chondrocytes,the surrounding rim or capsule was more obvious in the isolated chondrons,and they exhibited obvious differences in shape.The cells within one cluster from different age groups were similar to the morphology observed in cartilage in situ.The adult and old chondrons generally possessed a thicker pericellular matrix with more enclosed cells,and the chondrons contained more cells can reach 47％.Conclusion These findings further suggest that the properties of the chondrons and pericellular matrix have an important influence on the biomechanical microenvironment of the knee joint cartilage degeneration that occurs with age.
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<p><b>BACKGROUND</b>Chondrocytes' phenotype and biosynthesis of matrix are dependent on having an intact cytoskeletal structure. Microfilaments, microtubules, and intermediate filaments are three important components of the cytoskeletal structure of chondrocytes. The aims of this study were to determine and compare the effects of the disruption of these three cytoskeletal elements on the apoptosis and matrix synthesis by rabbit knee chondrocytes in vitro.</p><p><b>METHODS</b>Chondrocytes were isolated from full-thickness knee cartilage of two-month-old rabbits using enzymatic methods (n = 24). The isolated cells were stabilized for three days and then exposed to low, medium, and high doses of chemical agents that disrupt the three principal cytoskeletal elements of interest: colchicine for microtubules, acrylamide for intermediate filaments, and cytochalasin D for actin microfilaments. A group of control cells were treated with carrier. Early apoptosis was assessed using the Annexin-FITC binding assay by flow cytometry on days 1 and 2 after exposure to the disrupting chemical agents. The components and distribution of the cytoskeleton within the cells were analyzed by laser scanning confocal microscopy (LSCM) with immunofluorescence staining on day 3. The mRNA levels of aggrecan (AGG) and type II collagen (Col-2) and their levels in culture medium were analyzed using real-time PCR and enzyme-linked immunosorbent serologic assay (ELISA) on days 3, 6, and 9.</p><p><b>RESULTS</b>In the initial drug-dose-response study, there was no significant difference in the vitality of cells treated with 0.1 µmol/L colchicine, 2.5 mmol/L acrylamide, and 10 µg/L cytochalasin D for two days when compared with the control group of cells. The concentrations of colchicine and acrylamide treatment selected above significantly decreased the number of viable cells over the nine-day culture and disrupted significantly more cell nuclei. Real-time PCR and ELISA results showed that the mRNA levels and medium concentrations of AGG and Col-2 were significantly decreased for cultures treated with colchicine and acrylamide when compared with untreated cells at three, six, and nine days, and this inhibition was correlated with higher matrix metalloprotease-13 expression in these cells. Cellular proliferation, monolayer morphology, and matrix metabolism were unaffected in cytochalasin D-treated cells when compared with control cells over the nine-day culture period.</p><p><b>CONCLUSIONS</b>The disruption of the microtubulin and intermediate filaments induced chondrocyte apoptosis, increased matrix metalloprotease expression, and decreased AGG and Col-2 expression in rabbit knee chondrocyte cultures. Our findings suggest that microtubulin and intermediate filaments play a critical role in the synthesis of cartilage matrix by rabbit knee chondrocytes.</p>
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Animals , Rabbits , Cartilage, Articular , Cell Biology , Metabolism , Chondrocytes , Cell Biology , Collagen , Metabolism , Cytoskeleton , Metabolism , Knee Joint , Cell Biology , Metabolism , Microscopy, ConfocalABSTRACT
<p><b>BACKGROUND</b>Osteoporosis (OP) is a common bone disease, which adversely affects life quality. Effective treatments are necessary to combat both the loss and fracture of bone. Recent studies indicated that caffeic acid phenethyl ester (CAPE) is a natural chemical compound from honeybee propolis which is capable of attenuating osteoclastogenesis and bone resorption. Therefore, this study aimed to investigate the effect of CAPE on bone loss in OP mice using micro-computed tomography (CT) and histology.</p><p><b>METHODS</b>Eighteen mice were prepared and evenly divided into three groups. The six mice in the sham+PBS group did not undergo ovariectomy and were intraperitoneally injected with PBS during the curing period. Twelve mice were ovariectomized (OVX) to induce OP. Six of them in the OVX+CAPE group were intraperitoneally injected with 0.5 mg/kg CAPE twice per week for 4 weeks after ovariectomy. The other six OVX mice in OVX+PBS group were treated with PBS. All the mice were sacrificed 4 weeks after ovariectomy. The tibias were bilaterally excised for micro-CT scan and histological analysis. The Mann-Whitney U test was used to test the statistical differences among groups.</p><p><b>RESULTS</b>Bone loss occurred in OVX mice. Compared with the sham+PBS group, mice in the OVX+PBS group exhibited a significant decrease in bone mineral density (BMD, P < 0.05), bone volume fraction (BV/TV, P < 0.01), trabecular thickness (Tb.Th, P < 0.05), and trabecular number (Tb.N, P < 0.01), as well as a non-insignificant increase in the number of osteoclasts (N.Oc/B.Pm). With CAPE treatment, the microarchitecture of the tibial metaphyses was significantly improved with a reduction of osteoclast formation. Compared with the OVX+PBS group, BV/TV in the OVX+CAPE group was significantly increased by 33.9% (P < 0.05).</p><p><b>CONCLUSION</b>CAPE therapy results in the protection of bone loss induced by OVX.</p>
Subject(s)
Animals , Female , Mice , Bone Density , Caffeic Acids , Pharmacology , Metabolism , Mice, Inbred C57BL , Ovariectomy , Phenylethyl Alcohol , Pharmacology , Propolis , Chemistry , Tomography, X-Ray ComputedABSTRACT
10.3969/j.issn.2095-4344.2013.26.021
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BACKGROUND:Many studies have shown that matrix metal oproteinases 1, 3, 9 and 13 play an important role in articular cartilage degeneration and destruction, but there is less special research on the articular synovium. OBJECTIVE:To observe the effect of long-distance running on the expressions of matrix metal oproteinases 1, 3, 9 and 13 in the synovium. METHODS:Fifteen male Wistar rats were divided into three groups:control group, tablet group and uphil group. Rats in the control group received ordinary captivity;rats in the tablet group ran on the horizontal treadmil (0°) at the speed of 1 km/h for 1 hour daily, and lasted for 45 days;rats in the uphil group daily ran on the horizontal treadmil (0°) at the speed of 1 km/h for 1 hour, and lasted for 15 days, and then the rats ran on the uphil treadmil (+20°) at the speed of 1 km/h for 1 hour daily and lasted for 30 days. The knee joint synovium injury models with varying degrees were established. The dual hind knee joints were obtained after modeling for paraffin-embedded. Then the overal sagittal slices were obtained for hematoxylin-eosin staining and immunohistochemical staining, and the experimental results were observed and analyzed. RESULTS AND CONCLUSION:After long-distance running, the expression of matrix metal oproteinases 1 in synovium of the tablet group and uphil group was increased when compared with that of the control group (P0.05). There was no significant difference in matrix metal oproteinases 3 expression (P>0.05). The expressions of matrix metal oproteinase 9 and matrix metal oproteinase 13 in synovium were in gradient increasing state (Pexercise can influence the normal physiological structure of rat knee joint synovium by changing the expression of matrix metal oproteinases.
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BACKGROUND: Vascular endothelial growth factor play an important role in promoting healing of osteoporotic fractures, but whether it can affect the bone mineral density is not clear. OBJECTIVE: To observe the correlation between serum vascular endothelial growth factor, bone mineral density and the number of osteoblasts in the ovariectomized rats. METHODS: Forty female Sprague-Dawley rats were randomly divided into ovariectomized group and control group. After 3 months, the bone mineral density of the whole body, femur and lumbar spine was measured. Rat enzyme-linked immunosorbent assay kit was used to measure the level of serum vascular endothelial growth factor. Then, the rats in two groups received femoral metaphyseal fixation, decalcified, dehydrated, embeding in paraffin, slicing and hematoxylin-eosin staining. Each slice was free to take five fields of view (10×40) in order to count the osteoblasts of femur distal metaphysis under optical microscope. RESULTS AND CONCLUSION: After ovariectomized for 3 months, the rats body mass was increased significantly (P 0.05), and the difference of the osteoblast number between ovariectomized group and control group was not significant (P > 0.05). This indicated that there was no correlation between bone mineral density and the number of osteoblasts and vascular endothelial growth factor level in the ovariectomized group and the control group. These findings suggest that the bone mineral density is reduced and the body mass is increased in the ovariectomized rats, and the reduced bone mineral density of ovariectomized rats may be irrelevant with the change of serum vascular endothelial growth factor.
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ObjectiveTo study the expression of vascular endothelial growth factor (VEGF) and aquaporin 1 (AQP1) in the synovium of rheumatoid arthritis (RA) patients,and their correlation with angiogenesis.MethodsThe expression of VEGF and AQP1 in the synovial tissue was detected with immunohistoehemistry in 7 patients with RA,12 patients with osteoarthritis (OA).The expression of VEGF and AQP1 positive cells and vessels was scored,and the correlation of positive cells with vessels was analyzed.Rank-sum test and Spearman's correlation analysis were used for statistical analysis.ResultsThe expression of VEGF positive cells was significantly correlated with vessels in the synovium of RA group(rs=0.971,P＜0.01 ).No significant correlation was found between VEGF positive cells and vessels in synovium of the OA group (rs=0.235,P=0.462).There was no evident difference in the expression of VEGF positive cells between RA and OA group (Z=-0.390,P=0.711 ).The expressions of AQP1 positive cells were significantly correlated with vessels in the synovium of RA group (rs=0.828,P=0.022).No significant correlation was found between AQP1 positive cells and vessels in the synovium of OA group (rs=0.396,P=0.203).There was no notable difference in the expression of AQP1 positive cells between RA and OA group (Z=-0.302,P=0.773).The expressions of VEGF positive cells were significantly correlated with AQP1 positive cells in RA group (rs=0.891,P=0.007).No significant correlation was found between VEGF positive cells and AQP1 positive cells in OA group (rs=0.338,P=0.283).ConclusionThe expressions of VEGF and AQP1 are significantly correlated with angiogenesis in the synovium of RA,and they play an important role in the pathology of RA.Moreover,there may be synergistic effect between VEGF and AQP1 in RA.
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Objective To determine whether there was any correlation between the degree of degenerative changes in the patellar cartilage and the clinical outcome after TKA without patellar resurfacing.Methods A clinical study was performed on 133 knees of 88 patients that underwent TKA without patellar resurfacing from January 2002 to May 2006. According to the degenerative condition of the patellar cartilage,patients was classified as mild group, moderate group, and severe group. Pre- and post-operative evaluations were performed using the knee and function scores of the Knee Society Clinical Rating System (KSS) and Anterior Knee Pain Rating. Results The duration of follow-up was 72 months (range 48-102). The overall knee score of KSS in all patients were improved from 35.1±5.4 preoperatively to 91.7±5.6 postoperatively,and function score of KSS from 19.2±9.8 preoperatively to 83.7±17.5 postoperatively. The mean knee scores of KSS were improved from 34.7±6.2, 36.5±5.2 and 35.3±6.2 preoperatively to 92.6±4.5, 90.5±6.7 and 91.9±5.9 in mild, moderate, and severe group postoperatively, respectively. The mean function scores of KSS were improved from 14.2±8.6, 16.5±7.4 and 17.0±7.5 postoperatively to 86.6±12.6, 82.0±17.2 and 82.8±21.1 in mild, moderate, and severe group postoperatively, respectively. There was no difference among all groups with regard to the postoperative knee scores and function scores of KSS. The prevalence of anterior knee pain was 11.3% in all, and 11.9% in mild group, 11.6% in moderate group and 10.4% in severe group. There was no difference among all groups with regard to the anterior knee pain. Conclusion The clinical outcome and anterior knee pain after TKA without patellar resurfacing was not correlated with the severity of degenerative changes in the patellar cartilage. The degree of degenerative condition of the patellar cartilage is not indication for patellar resurfacing.
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Objective To observe the effects of cyclic tensile strain (CTS) on in vitro expression of glycosaminoglycans (GAG) in rabbit chondrocytes of different ages.Methods Nine male New Zealand rabbits were grouped into juvenile (2 months), adult (8 months), and senior (31 months) groups. The bilateral knee joints were harvested using sterile technique from each rabbits. In each age group, rabbit articular chondrocytes were cultivated in vitro after randomization into a control group and a CTS group, with 6 specimens in each. In the next 3 days, CTS was applied (sin10％, 0. 5 Hz, 6 h/d) in the CTS group for 6 hours per day while no CTS was applied in the control group. After the first CTS treatment, the supernatant of cell culture was collected every 12 hours from each specimen in both groups to assess the GAG levels by Alcian blue assay.Results Expressions of GAG showed significant increases in both control and CTS groups in each age group ( P ＜ 0. 05) . Different age groups showed significant differences in the GAG secretion over different time points. Compared with the younger cells, the older ones showed the most significant difference in growth between the control and CTS groups at 12 hours, though the older cells produced less GAG than the younger ones in both groups at the end of the experiment (72 hours).Conclusions CTS can stimulate rabbit chondrocytes of different ages to secrete more GAG, and younger cells tend to produce more GAG than the older ones.