检测结直肠癌患者血清巨噬细胞集落刺激因子(M-CSF)的含量并探讨其临床意义。方法:采用酶联免疫吸附分析法(ELISA)对62例经病理证实的术前结直肠癌患者、40例结直肠良性病患者和40例健康体检者血清M-CSF水平进行检测。结果:结直肠癌患者血清M-CSF水平明显高于结直肠良性病患者和健康体检者(Plt;0.01);结直肠癌患者血清M-CSF水平与肿瘤分期、淋巴结转移及远处转移有关(Plt;0.05),与性别、年龄、分化程度不相关(Pgt;0.05)。结论:M-CS与结直肠癌的肿瘤分期、淋巴结转移及远处转移有关,可能是一个判断结直肠癌预后的生物学指标。
Objective To investigate the effects of human acellularamnion membrane on SD rat tendon adhesion and to obtain the experimental data for clinical application in preventing postoperative tendon adhesion. Methods The tendons of 28 adult SD rats hindlimb were cut and sutured. The tendons of left hindlimb were encapsulated by human accellular amnion membraneas the experimental group and the ones of the other side were not encapsulatedas control group. The rats were killed 1, 2, 4, 6, 8 and 12 weeks after operation. The results were evaluated grossly and histologically. Results There were no differences in healing of injury tendon and inflammatory response between the two groups. The anatomical and histological results showed the experimental group had less adhesion than the control group(Plt;0.05). Conclusion Human acellular amnion membrane can prevent adhesion of tendonwithout affecting tendon healing and is an optimal biological material to prevent tendon adhesion.
OBJECTIVE: To sum up the clinical results of allogeneic humeral transplantation with vascular anastomosis, and evaluate the clinical significance. METHODS: From September to November 1979, 1 case with humeral shaft defect of 10 cm in length and 2 cases with tibia shaft defect of 12 cm in length were repaired by allogeneic humeral transplantation with vascular anastomosis. Azathiopurine and prednisone were applied for 3 months postoperatively. All cases were followed up for 20 years. RESULTS: Case 1 recovered well with good bone union and reconstruction after operation, and could work normally. In case 2, five chronic rejections were occurred during 3 years after operation, and recovered after treatment, the allograft bone was fractured after 2 years of operation, and unioned by autogeneous iliac bone transplantation. In case 3, the distal part of allograft bone was fractured after 46 months, and unioned by autogeneous iliac bone transplantation. The middle part of allograft bone was non-unioned after 20 years follow-up in case 3, but the patient could still work normally. CONCLUSION: The clinical results of allogeneic long bone transplantation can be improved by rational tissue matching test, application of effective immunosuppressive drugs in a certain period according to the principles of modern transplantation immunology.
目的:探讨开胸心脏瓣膜替换术后胸壁瘘及慢性化脓性肋软骨炎的处理方法。方法:对单根的肋软骨炎并胸壁瘘者,在压痛最明显处直接切除受累的肋软骨及窦道组织;对伴瘘的胸部多根肋软骨炎,可在经胸壁相对正常处切开,建立以远离感染部位为蒂的开放胸部皮瓣,经瘘口加压注入美蓝使受累的肋软骨及坏死筋膜染色,沿染色部完整切除受累的肋软骨及筋膜、瘘管周围组织;在手术创面皮瓣下置放盆式多孔引流管,术后持续低负压吸引,选用敏感抗生素。结果:本组3例,术后6天拨管,10天后伤口愈合,效果良好。结论:经正常皮肤切口入路,建立开放胸壁皮瓣,彻底清除感染坏死的肋软骨及瘘管周围组织是治疗开胸心脏换瓣术后胸壁瘘及慢性化脓性肋软骨炎的可靠方法。
Objective To review the latest development of amniotic membrane andits application. Methods Related literatures on the development of amniotic membrane and its application were extensively reviewed and summarized. Results There were amniotic epithelial cells and many growth factors in the outer layer of amniotic membrane and there were many kinds of collagen in the basement. The special structure promoted the growth of many kinds of cells. It was widely used in ophthalmology. Conclusion As it is easily available, compatible, cheap in price, low in antigenicity, and able to promote the growth of many kinds of cells, with few ethical problems involved, amniotic membrane will be more and more widely applied.
Objective To investigate the effect of tissue engineered bone with cryopreservation on healing of bone defects and to explore feasibility of cryopreservation for tissue engineered bone. Methods Tissue engineeredbones were constructed with osteoblasts being seeded onto bio-derived materials made from freshhuman bones,and they were preserved at 4℃ and －196℃ for 3 months and 6 monthsrespectively.They were applied to repair segmental bone defects of rabbit’s radius while the tissue engineered bone without cryopreservation and bio-derived materials were brought into control groups.The experiment was divided into groups A3,A6,B3,B6,C and D(group A3:tissue engineered bones were preserved at 4℃ for 3 months; group A6:tissue engineered bones were preserved at 4℃ for 6 months;group B3:tissue engineered bones were preserved at －196℃ for 3 months; group B6:tissue engineered bones were preserved at －196℃ for 6 months; group C: tissueengineered bones without cryopreservation; group D: bio-derived materials). Macroscopical and histologial examination were done at the 2nd,4th,6th,12th weeks, X-ray examination was done at the 6th,12th weeks and biomechanics were determined at 12th weeks after operation respectively. Results Macroscopical observation showed no significant differences among group A3, A6, B3, B6 and C, but less new bone formation and more obvious boundary in group D were observed. Histological observation showed more collagen and new bone around the edge of implant of group A3, A6, B3, B6 and C than group D, and histological evaluation showed significant differences between group D and other groups(P＜0.05). Radiographic observation showed no absorbability of the implant cortex and less new bone formation in group D, but the unity between implant and host bone, medullary cavity reopened, disappearance of fracture line and fine bone modelling were observed in other groups at 12 weeks after operation. Biomechanics between group D and other groups showed significant differences(P＜0.05). Conclusion Cryopreservation (4℃ and -196℃) were capable of preserving tissue engineered bone for long time, and tissue engineered bone withcryopreservation has significant effect on healing of bone defects. The methods f it clinical application.
Objective To study the differentiation of the human osteoblasts during the construction of the tissue engineered periosteum with the human acellular amniotic membrane(HAAM).Methods To construct the tissue engineered periosteum (n=60) with HAAM, the human fetal osteoblasts were used. The fetal osteoblasts were cultured for 2, 4, 6, 8, and10 days, and then their total RNA was extracted, which were reversely transcripted to cDNA. The realtime PCR analysis was used to reveal Cbfal and Osterix, and the cycle threshold (Ct) was also measured. The simplycultured osteoblasts were used as the control group (n=20).Results The expression of Cbfa1 was higher in the experimental group on the 2nd day when compared with that on the 4th, 6th, and 8th day(P＜0.05). The same result existed on the 10th day when compared with that on the 4th and 8th day. The expression of Osterix increased and was highest on the 8th day when compared with the other results(P＜0.05). Both of the 2 gene expressions were decreased in the control group when compared with those in the experimental group, but with no significant difference(P＞0.05). Conclusion Cbfa1 and Osterix can be normally expressed by the osteoblasts after their integration with HAAM. As a scaffold, HAAM can be used to keep the osteoblast phenotype and differentiation with an osteoconductive ability. Such a cell-scaffold complex may provide a basis for the osteogenesis.
Objective To provide the chosen scaffold materials for experiment and application of tissue engineering and to detect the properties of the collagenbio-derived bone scaffold material loading WO-1. Methods The purebio-derived bone scaffold material, bio-derived bone scaffold material loading collagen, collagen bio-derived bone scaffold material loading WO-1 were made by use of allograftbone, and typeI collagen, and WO-1. The morphological features, constitute components and mechanical properties were examined by scanning electron microscopy,X- rays diffraction and mechanical assay. Results The bio-derived bone scaffold material maintained natural network pore system; the bio-derived bone scaffold material loading collagen maintained natural network pore system, the surface of network pore system was coated by collagen membrane; the collagen bio-derived bone scaffold material loading WO-1 maintained natural network pore system, thesurface of network pore system was coated by collagen membrane. The pore sizes of the 3materials were 90-700 μm, 75-600 μm and 80-600 μm, respectively, and the porosities were 87.96%, 80.47%, 84.2%. There was no significant difference between them(P＞0.05).The collagen bio-derived bone scaffold material loading WO-1 consisted of ［HA,Ca10(OH)2(PO4)6］. There was no significant difference in the mechanical strength of the three scaffold materials. Conclusion The bio-derived bone scaffold material loading WO-1 is as good as bio-derived bone scaffold material and collagen bio-derived bone scaffold material, and it is an effective scaffold material for tissue engineering bone.
Objective To review the recent researches of basic fibroblast growth factor (bFGF) in tendon tissue engineering. Methods Recentoriginal related literature was extensively reviewed and analyzed. Results bFGF played an important role in establishing standard tendon tissue engineering cell lines, inducing the compound and analysis of extracellular matrix, enhancing interactions between cells and extracellular matrix and accelerating tissue engineering materials’ neovascularization. Conclusion The progresses in increasing endogenetic bFGF expression, controlling the release of exogenous bFGF and improving the bioutilization of bFGF has laid foundation for wider use of bFGF in tendon tissue engineering.
Objective To compare biological characteristics between articular chondrocyte and meniscal fibrochondrocyte cultured in vitro andto investigate the possibility of using cultured cartilage as a substitute for meniscus.Methods Chondrocytes isolated from articular cartilage and meniscus of rabbits aged 3 weeks were respectively passaged in monolayer and cultured in centrifuge tube. Cartilages cultured in centrifuge tube and meniscus of rabbit aged 6 weeks were detected by histological examination and transmission electron microscopy. Growth curves of articular chondrocytes and meniscalfibrochondrocytes were compared; meanwhile, cell cycles of articular chondrocytes and meniscal fibrochondrocytes in passage 2and 4 were separately measured by flow cytometry.Results Articular chondrocytes in passage 4 were dedifferentiated. Articular chondrocytes formed cartilage 2 weeks after cultivation in centrifuge tube, but meniscal fibrochondrocytes could not generate cartilage. The differences in ultrastructure and histology obviously existed between cultured cartilage and meniscus; moreover, apoptosis of chondrocytes appeared in cultured cartilage. Proportion of subdiploid cells in articular chondrocytes passage 2 and 4 was markedly higher than that in passage 2 and 4 fibrochondrocytes(Plt;0.05). Conclusion Meniscal fibrochondrocytes can not form cartilage after cultivationin centrifuge tube, while cartilage cultured in centrifuge tube from articular chondrocytes can not be used as graft material for meniscus. Articular cartilage ismarkedly different from meniscus.