Arthroplasty, Replacement, Hip ; Hip Prosthesis ; Humans ; Reoperation

Objective To investigate the effects of TNF-?,IL-12,IL-15 and underglycosylation IgA_1 in mesangial deposition in the clinicopathological study of IgA nephropathy(IgAN).Methods Seventy-four patients with IgAN were enrolled in the study,with 10 patients randomly selected after remission,10 MCD and 10 healthy volunteers as control groups.The levels of TNF-? in serum and urine were examined by radioimmunoassay,and the levels of IL-12 and IL-15 were examined by ELISA.Immunohistochemistry was used to detect the expression of TNF-? in renal tissue,and the directed immunofluorescence was used to detect the underglycosylation of IgA_1(UGIgA_1)in mesangial deposition.Results The levels of TNF-?,IL-12 and IL-15 in serum of patients with IgAN were higher than those of MCD group,healthy control group and remission group.Compared with the negative group,33 patients with UGIgA_1 positive in renal tissues had lower levels of TNF-? in serum,longer course and less class of renal tissue injury.The positive areas of TNF-? in renal tissue and levels of TNF-? in serum were positively correlated with urinary protein(r=0.249,0.702,P=0.000).There was negative correlation between the levels of TNF-? in serum and Ccr(r=-0.231,P=0.048).The levels of IL-15 was positively correlated with the course of disease(r=0.266,P=0.022) and negatively with Scr(r=-0.320,P=0.005).Conclusions The TNF-?,IL-12 and IL-15 are all involved in the onset of proteinuria in IgAN patients,and IL-15 acts as a factor against renal injury.The patients with UGIgA_1 positive in mesangial have longer course and less pathological changes damaged than those of the UGIgA_1 negative patients.The TNF-? may serve as an important factor in the aggravation of IgAN.

OBJECTIVETo study the medium and long term effects of perfusion of bone marrow stromal stem cells through optional artery for the treatment of non-traumatic femoral head avascular necrosis.

METHODSFrom January 2000 to December 2004,62 cases(78 hips) with non-traumatic femoral head necrosis accepted optional artery marrow stromal stem cells infusion treatment and had complete follow-up data, including 43 hips of 35 males and 35 hips of 27 females with an average age of 36.3 years old (22 to 54). According to preoperative imaging data, 16 hips were ARCO I stage, 52 hips were II stage, 10 hips were III a stage. Harris score was 64.94 +/- 8.12 preoperatively. Postoperative Harris score at the last follow-up, imaging changes,DSA vascular changes were analysis.

RESULTSThe patients were followed up for 9 to 13 years (means 11 years). By the end of the follow-up, a total of 18 hips got artificial joint replacement, 10 hips of preoperative ARCO I, II period got artificial hip joint replacement, 8 hips of IIIa period got hip artificial joint replacement. Harris score was 71.21 +/- 0.19 at the end of the follow-up, it was obviously enhanced compared with preoperative. DSA showed blood vessels of supply the femoral head increased thickening.

CONCLUSIONPerfusion of bone marrow stromal stem cells through optional artery can effective treat non-traumatic femoral head necrosis of ARCO I, II period, it can make the femoral circumflex artery and its branches increased thickening.

Adult ; Angiography, Digital Subtraction ; Arthroplasty, Replacement, Hip ; Female ; Femur Head Necrosis ; therapy ; Follow-Up Studies ; Humans ; Male ; Mesenchymal Stem Cell Transplantation ; Middle Aged

Objective To evaluate mid-term(5-6 years)clinical and radiographic outcomes of cementless acetabular prosthesis in total hip arthroplasty(THA)and discuss the factors affecting postop- erative effect.Methods THA with cementless acetabular was used to treat 139 cases(148 hips)from January 1998 to May 1999.A retrospective study was done to analyze clinical effect and X-ray manifesta- tion of 109 cases(116 hips)that were followed up.Clinical evaluation was based on Harris hip score. The radiographical evaluation was performed according to orthotropia and lateral images of hip joint to ob- serve acetabular migration and bone changes around the hip and measure the polyethylene wear rate and direction of the acetabular polyethylene wear.Results The mean Harris score before operation was 44 points(10-70 points)but that after operation increased to 92.4 points(80-100 points)at latest follow up.Radiographical evaluation showed one hip with focal osteolysis,mean linear wear rate of 0.15 mm/ year and mean 10.4?for angle with vertical line.Abduction angel of the acetabula was mean 46?,with 10.5 mm for vertical distance and 8.7 mm for level distance.There was no revision of a fixed acetabulum component because of pelvic osteolysis secondary to polyethylene wear.No acetabular component was re- vised because of aseptic loosening or acetabular component migration at the latest follow up.Conclu- sions Cementless acetabular prosthesis in THA can successfully have good fixation.A long term follow up for cementless acetabular prosthesis is necessary because of potential factors like polyethylene wear and osteolysis.

Objective To study treatment of Vancouver type-B periprosthetie femoral fractures after total hip arthroplasty.Methods There were 10 cases with Vancouver type-B periprosthetic femo- ral fractures after total hip arthroplasty being treatment,including three cases with type-B1 undergone open reduction and allografi strut to fix the fracture,two with type-B2 undergone open reduction and revi- sion with a long stem and five with type-B3 undergone open reduction,revision with a long stem and al- lograft strut to restore bone.The mean duration of follow-up was 27 months(8-36 months).The Harris Hip Score and radiographs were used to evaluate the outcome.Failure of the procedure.was defined as the need for revision surgery because nonunion of fracture,implant loosening,and infection.Results All cases obtained successful fracture healing,with no stem loosening or infection.Of all,nine cases were a- ble to walk by themselves but one needed aid in walking.The Harris Hip Score was 83 at the time of the final follow-up.Osseous union of the allograft to the host femur occurred in eight hips and mild graft re- sorption in two.The cotex thickness of host femur was increased more than 3-5 mm.Conclusions Stem stability and bone quality are important factors determining the outcome of treatment for periprosthet- ic femoral fracture after hip arthroplasty.Good outcome can be achieved by adopting different treatments according to sub-classification of Vancouver type-B fractures.The allograft strut for the treatment of a Vancouver type-B periprosthetic femoral fracture can not only provide fixation,but also make fracture heal fast and augment bone mass and strength.

ObjectiveTo explore the effect of estrogen on osteoblast apoptosis induced by serum hungry in vitro.MethodsOsteoblasts of second or third generation from newly born SD rats calvaria were divided randomly into the control group, serum hungry group and serum hungry with estrogen group. Cells of each group were incubated for 24 h, 48 h, 72 h, 5 d, 7 d and 14 d, then labeled using TUNEL staining and examined for morphological characteristics of apoptotic cell under light microscopy after incubated for 72 h. The rates of apoptotic cells of each group were examined with flow cytometry.ResultsThe cells of the control group showed normal appears, the serum hungry group had many cells with purple and blue particles in nuclei, but serum hungry with estrogen group had less such cells. The rate of apoptotic cell significantly increased in serum hungry group and decreased in serum hungry with estrogen group compared with the control group examined with flow cytometry (P<0.05).ConclusionEstrogen can repress osteoblasts apoptosis of rats induced by serum hungry.

Objective To observe the effect of T-2 toxin on growth and development of rat epiphyseal plate of left knee and metaphyseal bone of femur and tibia in normal and low nutritional status, to find out possible pathogenic factors of Kashin-Beck disease and provide experimental basis for early intervention. Methods Ninety 3-week-old Wistar rats, weighing 60 - 70 g, were randomly divided into three groups: control group(general feed), T-2 toxin + general feed group, T-2 toxin + low nutrition feed group, thirty rats in each group with equally sex ratio. T-2 toxin (1.0 mg/kg) was administered orally 5 times a week via a gavage needle for 4 weeks. The change of hair, activity and body weight was observed. After 1, 2, 4 weeks, the epiphyseal plate of left knee and metaphyseal bone of femur and tibia (including distal femur and proximal tibia) were collected. Specimens were processed with HE and Masson staining. The morphology of chondrocytes and matrix collagen content in epiphyseal plate was observed. Trabecular bone volume fraction in tibial metaphyseal bone was analyzed by Image-Pro Plus 6.0 software. Results In the control group, rats were in good movement and hair with light, but in T-2 toxin + general feed group and T-2 toxin + low nutrition feed group, rats were found with reduced activities and hair with dark color. Body weights(g) of the control group, the T-2 toxin + general feed group and the T-2 toxin + low nutrition feed group were 81.0 ± 6.2, 79.0 ±5.1, 77.0 ± 7.5, respectively, by the end of first week; 101.8 ± 6.7, 97.0 ± 6.8, 93.0 ± 5.3, respectively, by the end of second week; 151.1 ± 15.7, 126.5 ± 11.9, 106.5 ± 11.5, respectively, by the end of fourth week. There was significant difference in groups by second week and the fourth week (F = 9.72, 41.65, all P ＜ 0.05 ). There was significant difference among multi-groups by the fourth week(all P ＜ 0.01 ). Under light microscope, at the second weeks, coagulative necrosis of chondrocytes was found in hypertrophic zone in the two groups with T-2 toxin; at the fourth weeks, cell necrosis increased. Masson staining showed collagen staining in the two groups with T-2 toxin significantly turned to clear pale coloration, indicating that the collagen matrix was significantly reduced. Image analysis showed there was significant difference in groups at the second and fourth week(F= 9.72, 41.65, all P＜ 0.05)in tibial metaphyseal trabecular bone volume fraction. There was significant difference between T-2 toxin + low nutrition feed group[(0.55 ± 0.12)％, (0.21 ± 0.0)％] and control group[(0.67 ± 0.09)％, (0.51 ± 0.14)％] by the second and fourth week(all P ＜ 0.01 ). Conclusions Under normal nutritional status, T-2 toxin can induce hypertrophic epiphyseal cartilage necrosis, collagen content decreased in epiphyseal plate, metaphyseal trabecular bone formation disorders; in the low nutritional status, T-2 toxin can lead to rat epiphyseal necrosis and significant metaphyseal bone disorder, but whether the performance is related to Kaschin-Beck disease needs to be studied further.

ObjectiveTo explore the mechanism of estrogen inhibiting osteoblast apoptosis induced with serum hungry.MethodsOsteoblasts of the second or third generation from newly born SD rats calvaria were divided randomly into three groups: control group,serum hungry group,serum hungry with estrogen group.Cells of each group were incubated for 1,2,3,5,7 or 14 d,and then were stained immunohistochemically.The rates of positive cells of each group were analyzed.ResultsThere was a little positive expression of Bax,Bcl2 and Fas in control group.The expression of Bax and Fas were significantly increased(P<0.05)in serum hungry group,peak time was 14 d,but the expression of Bcl-2 were not affected.Compared with that of serum hungry group,the expression of Bax and Fas significantly decreased(P<0.05) in serum hungry and estrogen group,peak time was still 14 d,while that of Bcl-2 increased(P<0.05).ConclusionSerum hungry can increase the expression of Bax and Fas in osteoblast,that can be inhibited by estrogen.Estrogen can also increase the expression of Bcl-2 in osteoblast.All of these may play a role in inhibiting osteoblast apoptosis induced with serum hungry.

Animals ; Bone and Bones ; metabolism ; Energy Metabolism ; physiology ; Humans ; Osteocalcin ; metabolism

OBJECTIVETo study the change and relationship among bone mineral density (BMD), collagen composition and biomechanical properties of the callus in the healing process of osteoporotic fracture.

METHODSThe osteoporotic rat model and fracture model were established through bilateral ovariectomy (OVX) and osteotomy of the middle shaft of the right hind tibiae, respectively. Ninety female SD rats were randomly divided into OVX group and sham group. With the samples of blood and callus, roentgenographic and histological observation were performed for the assessment of the healing progress of the fracture, and the serum concentration of TRAP-5b, proportion of type I collagen, BMD and biomechanical properties of the callus were measured.

RESULTSThe OVX group experienced a significant delay of fracture healing. The mean serum concentration of TRAP-5b of rats in the OVX group was much higher than that in the sham group after the operation (P less than 0.05), but the difference at the same time point after fracture was smaller than that before fracture (P less than 0.05). The BMD of the callus in both groups reached the peak value at the 6 th week after fracture while the proportion of the type I collagen and the biomechanical strength reached the peak at the 8th week.

CONCLUSIONSThe deficiency of estrogen after the ovariectomy could induce the up-regulation of the osteoclasts activities, whereas the potency of further activation after fracture was depressed. Although the synthesis of collagen together with its mineralization determines the biomechanical properties of new bone, the accumulation of collagen could be assessed as an index in the prediction of biomechanical strength of bones independent of the bone mineral deposition.

Acid Phosphatase ; blood ; Animals ; Biomechanical Phenomena ; Bone Density ; Bony Callus ; physiology ; Collagen ; chemistry ; Collagen Type I ; blood ; Fracture Healing ; physiology ; Isoenzymes ; blood ; Male ; Rats ; Rats, Sprague-Dawley ; Tartrate-Resistant Acid Phosphatase