Objective:To study the expression of cbf?1 on mouse MDPC-23 cell line,and discuss the role of cbf?1 in the regulation of dental embryo development. Methods:By transient transfection,immunofluorescence,and western blot,the expression of cbf?1 on mouse MDPC-23 cells were studied. Results:The control MDPC-23 cells didn't express cbf?1.After transient transfected for 48 h,cbf?l expression was significantlly increased.BMP_(2)could induce low level expression of cbf?1. Conclusion:cbf?l expression was significantly increased 48h after transient transfection.

Cartilage lesions resulting from acute or chronic injury are one of the major factors leading to joint disease and disability ,and eventually osteoarthritis. It is well known that articular cartilage in adults has a limited ability for self-repair,and represent a clinical management challenge. Numerous methods have been devised to augment its natural healing response. The most appropriate treatment option for an individual patient should be based on the pathologic characteristics of the lesion and the patient's symptoms, age and expectations. This review presents the current articular cartilage management and the direction in future therapeutic regimens.

Damaged articular cartilage has a limited intrinsic capacity to heal itself,especially in adults,It represents a clinical challenge.Novel gene therapy can introduce particular beneficial gene into the seeded sells and express growth factors or other therapy proteins at the repair site.Gene therapy focuses on selecting proper gene,target cells and the transferring systems. The tissue engineering cartilage with gene-modified seeding cells and transferring objective gene to target sells locally present new therapeutic regimens for repairing defects in articular cartilage.

Limb allotransplantation is an important procedure for reconstruction of limb defects.This review describes the history and development of this method,and expects to bring extremity transplantation closer to being a realistic possibility.

The effect of Lycii Cortex on the PCOS rat model and the mechanism of action were investigated in the present study. The PCOS rat model was induced with Poretsky methods. Then the rats were randomly divided into four groups: the model group, melbine group (0.45 g x kg(-1)), low (2.5 g x kg(-1) and high (10 g x kg(-1)) dosage group of Lycii Cortex. The animals were orally administrated with the drugs for 14 days. In addition, another control group was added in this study. The rats were weighted before and after drug treatment. After 14 days treatment, oestrous cycle of rats were detected; blood serum was separated to determine T and FINS and rat's uteri were isolated. The mRNA and protein (total and phosphorylated) expressions of PI3K and PKB in uteri were measured with Real-time RT-PCR and Western blot, respectively. Compared with the control rats, the body weight gain and serum level of T and FINS were significantly increased. While, the mRNA and protein (phosphorylated) levels of PI3K and PKB were markedly decreased in PCOS group. Lycii Cortex treatment significantly decreased the body weight gain and serum level of T and FINS in a dose-dependant manner. It also markedly increased the mRNA and protein (phosphorylated) expressions of PI3K and PKB. Meanwhile, the melbine treatment also showed the curative effect. Lycii Cortex can relieve the symptoms of PCOS and the mechanism might be related to PI3K/PKB pathway.
Animals ; Drugs, Chinese Herbal ; administration & dosage ; Female ; Humans ; Lycium ; chemistry ; Phosphatidylinositol 3-Kinases ; genetics ; metabolism ; Phosphorylation ; drug effects ; Polycystic Ovary Syndrome ; drug therapy ; enzymology ; genetics ; Proto-Oncogene Proteins c-akt ; genetics ; metabolism ; Rats ; Rats, Sprague-Dawley ; Signal Transduction ; drug effects

Objective: To observe effects of different sulfonylurea compounds on expression of sulfonylurea receptor 2 (SUR2) in myocardium of the Goto-Kakizaki (GK) rats. Methods: Spontaneous diabetic GK rat models were divided into 6 groups: the diabetes model group, the Glibenclamide group, the Glipizide group, the Gliclazide group, the Glimepiride group and the positive control group(treated with insulin), with 12 rats in each group. A normal control group was also set up for comparison. The expression of SUR2 in myocardium of the GK rats was investigated by radioligand binding assay. SUR2 mRNA expression in the myocardial cells of rats was detected through reverse transcriptase-polymerase chain reaction (RT-PCR). Results: Twelve weeks later, no significant difference was found in the SUR2 receptor density(Bmax)and affinity(Kd) between the sulfonylurea treated groups and the other 3 groups (P>0.05). There was no significant difference in SUR2 mRNA expression between the diabetic, insulin-treated diabetic and control groups(P>0.05). Cardiac SUR2 mRNA levels were not significantly different between sulfonylureas-treated diabetic and non-treated diabetic rats (P>0.05). Conclusion: The diabetes itself does not affect the sulfonylurea receptor(SUR2) expression in myocardial tissues. Sulfonylureas at treatment dosage have no effect on receptor expression of SUR2.

The stress resistance of Saccharomyces cerevisiae industrial strains for molasses to high-concentration ethanol,high temperature,high osmotic pressure,furfural toxicity,phenol toxicity,acetic acid toxicity and G418 toxicity were analyzed by the spot dilution growth assays in this paper. The results showed that the stress resistances among these industrial strains were obviously different. The strains AS2.1189 and AS2.1190 are more resistant to the tested stress factors than any others .The strain 396 is the most resistant to the acetic acid toxicity and G418 toxicity,and the strain 2610 is the most resistant to the high temperature.

Objective:To study the PDT effects on culturing endothelial cell in vitro under the differens content of CPD 4. Methods: According to the existing techniques obtaining prime umbilical vein endothelial cell in 24 well culturing plate,10 5/well.Add 1640 medium mixed with different final concentration of CPD 4 individuallly and incubate for 1h. Then shine them with 630～640 nm red light. Observe the morphological changes of EC. After PDT 6 h,measure the contents of Prostaglandin F 1?(PGF 1?) and and LDH in the culturing medium and the percentage of the residual cell. Results:With the concentration of CPD 4 increasing, the damage degree of EC aggravates. There was emergence of EC contracting ,falling off , cytoplasmic swelling,floating and dying. The contents of PGF 1? and LDH were increasing and the percentage of residual cell decreases simultaneously. There was statistical significance between the five groups. Conclusion:The effect of PDT is direct.The effectiveness has two characteristic: ①CPD 4 induced PDT has direct photosensitised damage to EC. There exists CPD 4 dose dependence.②The PDT target of EC is membrane and cytoplasma organelle. The damage is lethal and irreversible.

[Objective]To discuss the methods and results of total hip arthroplasty for the adult hip of severe congenital dislocation.[Method]Thirteen patients with unilateral Crowe type-Ⅳ dislocation underwent total hip replacement.All patients were distracted for two weeks preoperatively,and in the operation procedure,the acetabulat rotation center and abductor function were reconstructed on the basis of soft tissue release.The evaluations after surgery included the leg-length and Harris scores.[Result]According to the follow-up with an average of 18 months,the Harris hip score averaged 90 points.The leg-length extended 3.1 cm on average.One patient appeared sciatic nerve palsy.[Conclusion]Total hip arthroplasty could effectively treat server congenital dislocation of adult hip by the methods of tissue release,reconstruction of acetabular,proper selection of prosthetic and protection of nerve.

[Objective]To introduce the technology of bone grafting with acetabular reinforcement device for the massive bone defects in the revision total hip arthroplasty.[Method]The massive acetabular bone defects were reconstructed in 8 cases from 2002 and 2007.The defects were classified according to the system of D'Antonio,ⅡB defects in 1 case,ⅡC defects in 2 cases,and Ⅲ defects in 5 cases.Methods:the reinforcement device with the morsellised impaction bone grafting in 3 cases,the reinforcement device with the morsellised impaction bone grafting and the structural autograft in 5 cases.Clinical and radiological evaluations were conducted for each patient.[Result]The follow-up duration averaged to 2.7 years,the Harris score were inoreased by 35 points in average.No hip required further revision of the acetabular component because of aseptic loosening.[Conclusion]The cavitary bone loss could be reconstructed by the bone-impaction grafting;the segmental bone loss could be reconstructed by the structural autograft.The acetabular reinforcement device can fix the grafted bone and support the cup.The massive periacetabular bone loss could be effectively reconstructed by reinforcement device with bone grafting.