BACKGROUND:Cartilage scaffold plays an important role in articular cartilage injury, but it is stil restricted in practice, leading to the repair failure using tissue-engineered cartilage. OBJECTIVE:To explore the preparation method of cartilage scaffold with directional structure and its repairing effect in cartilage injury of rabbits. METHODS:Directional cartilage scaffolds were prepared by temperature gradient induced phase separation technique. The cross-linking of cartilage scaffold was completed with genipin. The physical and mechanical properties of scaffolds were determined. Forty-eight white rabbits were modeled into exercised-induced articular cartilage injury and equivalently randomized into two groups, fol owed by implantation of non-directional or directional scaffolds. Samples were col ected at postoperative 6, 12 and 24 weeks to compare the repair effect of two scaffolds on rabbit joint injury. RESULTS AND CONCLUSION:Scanning electron microscope showed that the regular microstructures on the longitudinal section of directional scaffolds were aligned in the same direction, while the longitudinal and transverse planes of the non-directional scaffolds showed porous honeycomb structures. The elastic modulus of the directional scaffold was significantly higher than that of the non-directional scaffold (P<0.05). O’Driscol histological scores in the directional scaffold group were significantly higher than those in the non-directional scaffold group at 6, 12 and 24 weeks postoperatively (P<0.05). At postoperative 24 weeks, in the directional scaffold group, the three-dimensional reconstruction of the rabbit defect region was flat and smooth, and coronal two-dimensional scanning showed the cartilage thickness of the newborn cartilage was very close to that of the normal bone;the cartilage surface in the non-directional rabbits was flat under three-dimensional CT, and coronal two-dimensional scanning showed that the repaired cartilage was almost the same as the normal cartilage. Hematoxylin-eosin staining showed that at 24 weeks postoperatively, the defect site disappeared and the cartilage cel s arranged in the vertical direction in the directional scaffold group. There were typical cartilage lacunae at the defect site in the non-directional scaffold group at 24 weeks postoperatively. Our findings suggest that the directional cartilage scaffold prepared using temperature gradient induced phase separation technique holds good physical and mechanical properties, and its implantation into the rabbit articular cartilage injury induced by exercise can promote the injury repair to obtain ideal mechanical properties.

Objective: To investigate the inhibitory effect of baicalin on the fluorouracil (Fu) resistant hepatocarcinoma cell (HCC) BEL-7402/5-Fu and its possible mechanism. Methods: Hepatocarcinoma cell line BEL-7402 and Fu-resistant hepatocarcinoma cell line BEL-7402/5-Fu were cultured in vitro. The inhibitory effect of baicalin on the BEL-7402/5-Fu cells was assessed by MTT assay; the intracellular rhodamine fluorescence intensity was observed by flow cytometry; the expression of MDR1 gene was detected by RT-PCR; and the expression of protein P-glycoprotein (P-gp) was analyzed by Western blotting assay. Adhesion assay was conducted using Matrigel model. Expression of beta 1-integrin and E-CD protein was detected by immuno-fluorescence technique. Results: Baicalin inhibited the proliferation of both BEL-7402 and BEL-7402/5-Fu cells, with IC50 of baicalin being 34.2 mg/L and 36.6 mg/L, respectively. Baicalin (5 mg/L and 10 mg/L) partially reversed the resistance of BEL-7402/5-Fu to Fu, with the reversal folds being 28.6 and 46.7, respectively. Baicalin (5 mg/L and 10 mg/L) increased the sensitivity of BEL-7402 cells to Fu, with the sensitivity-enhancing folds being 1.4 and 2.1, respectively. Baicalin also increased the concentration of rhodamine and expression of integrin β1, inhibited the expression of MDR1 gene and P-gp, E-CD protein, and reduced the adhesion capacity, with the effect of 10 mg/L baicalin significantly effective than that of 5 mg/L baicalin (all P<0.05). Conclusion: Baicalin can inhibit the proliferation of BEL-7402/5-Fu in vitro, and partially reverse the resistance to Fu, which is attributable to the increased accumulation of intracellular drug concentration, inhibited expression of MDR1 gene.

Objective To study the value of CT and MRI(3D heavy T_2WI) in cerebrospinal fluid rhinorrhea.Methods 4 cases with spontaneous cerebrospinal fluid (CSF) rhinorrhea confirmed by operation were collected in this study.There were 2 men and 2 women.All patients underwent CT thickness was 0.625 mm and no gaps.MRI (coronal 3D heavy T2WI,thickness of 1 mm,TR/TE 5000 ms/119 ms).Results All 4 cases accepted the treatment of operations.The defects bone were showed by CT,and the sign of CSF of intracranial cavity communicated with nasal cavity diretly was showed by MRI,pituitary herniated into sphenoid sinus in one case also showed by MRI.Conclusion For spontaneous cerebrospinal fluid rhinorrhea,thin-section coronal CT scan and MR coronal 3D heavy T_2WI can clearly show the location of fistulas.

Objective To provide an information monitoring software for therapy drug,which can automatically construct safe concentration scope,statistically analyses data,query and input data.Methods TDMIS is developed by Powerbuilder 9.0 and is run in WIN 98 or the copy over it.2062 cases are analyzed through TDMIS and a safe concentration scope is set.Conclusion TDMIS is a practical software.It can make drug prescription standardized,computerized and easy to be statistically analyzed.The working efficiency and quality of clinical apothecary are greatly improved.

Sudden cardiac death is still a difficult problem for doctors.Every therapy has its drawback.In the past 20 years,there have been great progress in implantable cardioverter defibrillator.This therapy strategy may bring more benefits to indicated patients.This article reviews the application of implantable cardioverter defibrillator and summarizes its history and development,component,function,curative effect,symptom of adaption and contraindication.

Objective]To explore the experiences in syndrome differentiation and treatment of acute leukemia from chief physician Xia Xiaojun. [Metheod] Learning my teacher diagnosing the disease, I refer to literature and combine with the study to summarize and introduce my teacher's clinical experiences and academic point of view in treatment of acute leukemia from the etiology and pathogenesis, syndrome differentiation, treatment, prescriptions and so on. [Results]Teacher Xia thinks that the emphasis of acute leukemia is deficiency in origin and excess in superficiality.The treatment is replenishing qi and blood,enforcing spleen and nourishing kidney and detoxication and activating blood stasis.Weighing the illness samples priorities and distinguishing between primary and secondary so as to improve the curative effect.[Conclusion]Teacher Xia bases on the progress of acute leukemia in different stages of syndrome characteristics,combines traditional Chinese with western medicine and finds the Huisheng Decoction series hebal medicine for treatment according to syndrome differentiation.The clinical curative effect is remarkable and the knowledge is worthy of our further in-deep learning.

Acupuncture Points ; Acupuncture Therapy ; Female ; Humans ; Middle Aged ; Multiple System Atrophy ; therapy

Objective To study the level of serum vascular endothelial growth factor(sVEGF)in advanced non-small cell lung cancer(NSCLC) and its clinical significance.Methods Serum level of VEGF was detected by ELISA method in 96 patients with advanced NSCLC.sVEGF level was analyzed after giving 2-4 cycles of cisplatin-based chemotherapy.At the same time,serum level of VEGF in 50 healthy controls was detected.Results The level of sVEGF was significantly higher in patient with lung cancer than in control group (P＜0.01).No statistical significant defference was observed between sVEGF level of stage Ⅲ and Ⅳ NSCLC patients,the patients with squamocellular lung cancer and adenocarcinoma(P＞0.05);Descended sVEGF level was found in the patients with response to chemotherapy(P＜0.05).Conclusion sVEGF can be used to evaluate chemotherapy response and diagnoses in the patients with advanced NSCLC.

Autophagy is a catabolic process involving the degradation of a cell's own proteins and organelles and the subsequent recycle of cellular products. Despite the fact that autophagy helps maintain survival, excessive autophagy can lead to autophagic cell death. Recent researches showed that autophagy played an important role in the development, progression and treatment of colorectal cancer;however, the exact mechanisms of autophagy and its effect on chemotherapy and radiotherapy are still under debate.