Objective To investigate the correlation of endometriotic focus and peritoneal fluid as well as its effect on reproduction Methods Forty three women with surgical treatment or laproscope with infertility are divided into endometriosis group (24 cases) and normal pelvic group (control group 19 cases) The pathophysiology of patient′s peritoneal fluid, celiac macrophages and endometriotic cells are analyzed by chemotactic test on monocytes, dot blot hybridize, enzyme linked immunoadsorbent assay and the level of cytoplasmic [Ca 2+ ]i respectively Meanwhile, the influence of peritoneal fluid and endometriotic cells to sperm motivity as well as the effects to rat embryo cleavage are evaluated Results The monocyte moving distance induced by peritoneal fluid in endometriosis group Vs control is (87 2?9 4) ?m Vs (51 9?3 7) ?m ( P

BACKGROUND: It is of great significance to study the resilience of articular cartilage for human daily routine and their match quality. OBJECTIVE: To analyze the micromechanical properties of articular cartilage resilience under different loads and at time points. METHODS: The swine cartilage samples coated with tracers were compressed using the MTF-100 tensile machine, and the cartilage compression and resilience were recorded by CCD. Images were processed using digital image correlation technology.RESULTS AND CONCLUSION: During resilience, the strain value on the superficial surface of the cartilage was decreased most, successively followed by the middle layer and the deep layer, while the time of a decrease from 20%, 10% and 6% to 3% was similar. The longer the resilience time was, the more slowly the strain changed in different layers of the cartilage, but the ultimate strain was less than 1%. On the same layer under different compressive stress, the larger load caused faster strain change firstly, and then the smaller load brought about faster strain change. The effect of different continuous compressive time on the same layer of cartilage was similar with the load. These results showed that 90% resilience of the articular cartilage occurred within the first 15 minutes. The mechanical resilience of different layers of the articular cartilage has a close relationship with the loading and the loading time, and both compressive time and loading do harm to the resilience of articular cartilage. Besides, the cartilage will rebound to the state before compression.

BACKGROUND:With the development of science and technology and modern aerospace, the effects of mechanobiology in extreme mechanical environment—high acceleration are becoming an issue of concern. Studies have shown that high acceleration has certain effects on the cels. OBJECTIVE:Based on a centrifuge, to design a cel loading centrifuge used for exploration of cel mechanobiology under high acceleration. METHODS:For the cel loading centrifuge, a culture plate or/and culture bottle ful of culture fluid was/were loaded with constant acceleration or variable velocity to explore the experimental feasibility. Besides, a finite element model was built by ANSYS software according to structure and properties of the rotor. The rotor system was calculated under equilibrium and dangerous working conditions, respectively, to analyze the stress and deformation distribution. Moreover, the strength of the main shaft was checked under the dangerous working conditions. Then the analysis results of ANSYS were compared with the results of strength check. RESULTS AND CONCLUSION:Experimental findings showed that the culture plate or/and the culture bottle could be used for (0-40)×g highly constant acceleration or variable acceleration loading. Through the simulation and comparison analysis, we confirmed the reliability of the cel loading centrifuge. This cel loading centrifuge can be used to implement the study of cel mechanobiology under high acceleration in the general biology laboratory. It also provides a basis for wide application of cel loading centrifuge in the future.

Objective To evaluate the clinical efficacy of interventional techniques in the diagnosis and therapy of Dieulafoy disease. Methods A retrospective study was performed, including 17 patients with massive upper gastrointestinal hemorrhage (patients without peptic ulcer and portal hypertension or diagnosed with Dieulafoy disease by endoscopic examination). All patients had both DSA and interventional embolization treatment, and were followed for 12 months to appraise the clinical effectiveness. Results Sixteen patients were diagnosed as Dieulafoy disease by using DSA. Fifteen of the 16 patients were treated with embolization successfully withoutserious complications. One patient received subtotal gastrectomy because of upper gastrointestinal hemorrhage recurrence. Nine patients with irregular upper abdominal pain and burning sensation had complete remission after symptomatic management. Fifteen patients who had embolization showed no serious complications during the follow-up period of 12 months, there was no hematemesis and melena for the 15 cases with successful embolization. Conclusion The angiography and embolization are safe and efficacious in the diagnosis and therapy of Dieulafoy disease.

Objective To explore the clinical efficacy of indwelling suture in preventing re-adhesion of fallopian tube after fallopian tube recanalization(FTR). Methods Screen 93 patients with fallopian tube obstruction and FTR indications of prospective, the patients without other interference factors of infertility, they were randomized with random sampling into two groups (treatment group 50 and control group 43)and treated by FTR,then the treatment group with indwelling sutures in fallopian tube for 3 days, the control group were infused lipiodol into the tube and with a intrauterine cavity perfusion in 3 days. The two groups received followed up examination at 2,6 months after operation ( a treatment was repeated with the case of re-obstruction) . Follow-up for 12 months to appraise the pregnancy rate and the influence of pregnancy competence of tube with indwelling suture(6 months after operation, to collect and compare the pregnancy rate and ectopic pregnancy rate of patent tube in two groups). Results The tubal patency rate were 89.8%(53/59),89.5%(51/57)of treatment group at 2,6 months after operation and the control group were75.9%(44/58),75.0%(39/52), there was a significant difference between the two groups(2 m:χ2=4.027, P<0.05;6 m:χ2=3.958,P<0.05). One year after operation,the pregnancy rate of treatment group was 43.2%(16/37) , the control group was 20.6%(7/34) ,there was a significant difference(χ2=4.152,P<0.05). Six
months after operation, the pregnancy rate and ectopic pregnancy rate of patent tube in treatment group were 21.6%(11/51),2/11, the control group were15.4%(6/39),1/6, there was no significant difference between them(pregnancy rate:χ2=0.552,P>0.05). Conclusions The indwelling suture of fallopian tube can prevent re-adhesion better after FTR, then improve the long-term recanalization rate and the pregnancy rate. There is no change on the pregnancy competence of fallopian tube.

Natural degeneration or trauma of articular cartilage all can lead to its structural and functional damage. Without blood supply and nerve innervation, chondrocytes in the matrix lacunae obtain essential nutrients and excrete metabolites mainly through osmosis, finally leads to its low metabolic activity and difficulty in self-repair after injury. At present, drug conservative treatment and surgical operation are the main clinical treatment, but both of them can't meet the clinical needs well. The development of cartilage tissue engineering provides a new direction for the repair of articular cartilage injury, in which growth factors plays a very important role. Growth factors, together with seed cells and cell scaffolds, constitute the three elements for the construction of tissue-engineered cartilage. Among them, Growth factors can significantly promote cell proliferation and differentiation and induce their functions. Various growth factors synergistically mediate the differentiation of seed cells into chondrocytes. In recent years, stem cell cartilage tissue engineering developed rapidly, which has opened a new way for repair of articular cartilage damage due to its abundant cell resources, small damage to body itself, strong ability of proliferation and directional differentiation, biological repair and other prominent advantages. Different types of hydrogels and stem cells show different abilities to support chondrogenesis and require different growth factors to induce chondrocyte differentiation. Traditional growth factors for tissue engineering include transcription growth factor β, insulin-like growth factors, bone morphogenetic proteins, fibroblast growth factors and cartilage derived morphogenetic protein. Recently, some scholars found that platelet-rich plasma, platelet-rich fibrin, Kartogenin and Mechano-growth factor can also effectively induce chondrogenic differentiation of stem cells and maintain chondrocyte phenotype. In addition, some synthetic compounds such as dexamethasone and inorganic particles can also promote the differentiation of stem cells into cartilage. This article systematically summarized the new progress of the traditional growth factors, emphatically introduced the new discovered growth factors and some synthetic compounds and inorganic particles, which can induce stem cells into cartilage. Finally classified the different sources of stem cells and its suitable growth factors, and gave an outlook of the next research direction of growth factors.

BACKGROUND: The silk fibroin/type II collagen composite scaffold has been prepared by low-temperature bio-3D printing technology in the previous study and the scaffold has good mechanical properties. Studies have shown that mechanical stimulation is beneficial to bone remodeling, and gradient loading strain is beneficial to the activation of osteoblasts and osteoclasts. OBJECTIVE: To co-culture silk fibroin/type II collagen composite scaffolds with chondrocytes under compression loading, to observe the proliferation of cells, and to observe the preliminary repair effect of silk fibroin/type II collagen composite scaffold on cartilage defects. METHODS: The silk fibroin/type II collagen composite scaffold was prepared by low-temperature 3D printing to detect the porosity of the scaffold. The passage 3 mouse chondrocytes ADTC-5 were inoculated on the silk fibroin/type II collagen composite scaffold and cultured under static culture and mechanical load respectively. (1) Static culture: blank scaffold was set as control, and cell proliferation was detected by MTT assay at 1, 3, 5, 7, 10, 14 days of inoculation. (2) Culture under mechanical load: blank scaffold was set as control. At 1 day after inoculation, 0％, 1％, 5％, 10％, 15％, 20％ compressive strains were applied to the cell-scaffold complex, and continued to load for 3 days. Cell proliferation was detected by MTT assay, and the distribution, adhesion and morphology of the cells on the scaffold were observed by scanning electron microscopy and hematoxylin-eosin staining. A cartilage defect of 3.5 mm in diameter was made in the bilateral knee joint of New Zealand rabbits. The silk fibroin/type II collagen composite scaffold was implanted onto the left side, and no material was implanted onto the right side. The repair site was observed at 8 weeks after surgery. RESULTS AND CONCLUSION: (1) The porosity of the scaffold was (89.3±3.26)％, which was conducive to cell attachment. (2) After 5 days of static culture, the chondrocytes proliferated well on the surface of the composite scaffold. Under 0％, 1％, 5％, 10％, 15％, 20％ compressive strains, the cell proliferation on the scaffold first increased and then decreased, wherein the cell proliferation was highest under 10％ compressive strain, and lowest under 20％ compressive strain. (4) Under the scanning electron microscopy, the chondrocytes in the 0％ load group were distributed in the surface of the scaffold with irregularities, the cell morphology was obvious, and the cell protrusions were fully extended. There were few or no chondrocytes on the contact surface of the 10％ load group, and more cells distributed on the lateral and internal surfaces of the first layer, but the cell morphology was flat with obvious protrusions. (5) Hematoxylin-eosin staining showed that the chondrocytes in the 0％ load group were concentrated on the surface of the scaffold, and there were almost no cells in the pores, while the chondrocytes in the 10％ load group were distributed in the scaffold pores. (6) There was still a circular defect model with no scaffold implantation, and no obvious repair appeared; similar hyaline cartilage appeared in the defect after scaffold implantation, but there was no adhesion to the surrounding defected cartilage, and the new hyaline cartilage was independent. Overall, the adsorption, proliferation and growth of chondrocytes on the silk fibroin-type II collagen scaffolds is better when the compressive strain is 10％, and the composite scaffold can be used as a repair material for cartilage defects.

As the main organ of the body, the load-bearing ability of bone is closely connected to its biomechanical properties. Bone is a complex hierarchical biomaterial, whose biomechanical properties are determined by its own structure and biological characteristics. Because of its mechanical adaptability, bone tissues represent different biomechanical properties under different mechanical loading. To quantify the complicated properties of bone and provide an accurate theoretical basis for clinical research, it is necessary to give insight into the biomechanical properties of bone at different levels and the constitutive relationships of bone tissues. In this review, relative researches on constitutive relationships in recent years were summarized based on its hierarchical biomechanical properties.

As a kind of elastic load-bearing connective tissues on bone surface in dynamic joints, articular cartilage can provide low wear lubrication, shock absorption, load transfer and other supporting functions, and has hierarchical fiber composite structures and excellent mechanical properties. As an avascular and aneural tissue,the degenerated articular cartilage lacks the capability of self-healing after damage. The high incidence of arthritisis still a hot spot in basic and clinical researches. Articular cartilage is a mechanical sensitive tissue, andmechanical environment will affect the development of tissues in different directions. Extensive researches onbiomechanics and mechanobiology of articular cartilage were conducted in 2022. Many studies on morphology, function and mechanical state of cartilage,as well as mechanical state of cartilage under different conditions were reported. Some cartilage-related loading devices were designed at animal, tissue and cell levels. Researches onthe repair of cartilage degeneration and injury under mechanical loads were carried out in vitro and in vivo, andsome important repair method and means were obtained. The biomechanical and mechanobiology research on articular cartilage is the basis of arthritis, cartilage defect and repair. The influence of quantitative mechanical under 4 conditions on the repair of articular cartilage injury needs further study in vivo and in vitro

Objective To investigate the influence of different cell structures on the static and dynamic mechanical performance of porous titanium alloy scaffolds,and to provide a theoretical mechanical basis for the application of scaffolds in the repair of mandibular bone defects.Methods Porous titanium alloy scaffolds with diamond,cubic,and cross-sectional cubic cell structures were manufactured using three-dimensional printing technology.Uniaxial compression tests and ratcheting fatigue with compression load tests were conducted to analyze the static and dynamic mechanical performances of scaffolds with different cell structures.Results The elastic moduli of the diamond cell,cross-sectional cubic cell,and cubic cell scaffolds were 1.17,0.566,and 0.322 GPa,respectively,and the yield strengths were 71.8,65.1,and 31.8 MPa,respectively.After reaching the stable stage,the ratcheting strains of the cross-sectional cubic,diamond,and cubic cell scaffolds were 3.3%,4.0%,and 4.5%,respectively.The ratcheting strain increased with increasing average stress,stress amplitude,and peak holding time,and decreased with increasing loading rate.Conclusions The evaluation results of the static mechanical performance showed that the diamond cell scaffold was the best,followed by the cross-sectional cubic cell scaffold and the cubic cell scaffold.The evaluation results of the dynamic mechanical performance showed that the cross-sectional cubic cell scaffold performed the best,followed by the diamond cell scaffold,whereas the cubic cell scaffold performed the worst.The fatigue performance of the scaffold is affected by the loading conditions.These results provide new insights for scaffold construction for the repair of mandibular bone defects and provide an experimental basis for further clinical applications of this scaffold technology.