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.

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.

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.

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.

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

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 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.

Anti-Inflammatory Agents ; pharmacology ; Child, Preschool ; Humans ; Infant ; Infant, Newborn ; Precursor Cell Lymphoblastic Leukemia-Lymphoma ; complications ; pathology ; Prednisone ; pharmacology

Background Diabetes mellitus (DM) can provoke the apoptosis of retinal cells and downregulate the expression of calcitonin gene related peptide (CGRP) in the retina.Capsaicin promotes the release of CGRP and elicits protective effects on human organs.However,whether CGRP protects retinal cells in diabetic retinopathy (DR) is still unclear.Objective The study was designed to examine the effect of capsaicin on the apoptosis of retinal cells in diabetic rats and its relationship with CGRP.Methods Forty clean healthy adult male Sprague-Dawey rats were randomly divided into the diabetes group,capsaicin pretreated group,streptozocin (STZ)control group,capsaicin control group and plain control group,with 8 rats per group.The diabetic model was established by the intraperitoneal injection of 60 mg/kg in all rats except those of the plain control group.0.4 mL of a 1％ capsaicin injected at 20 mg/kg was subcutaneously injected for 3 consecutive days prior to model establishment in the capsaicin pretreated group,after which 1.2 mL of STZ was intraperitoneally injected on the fourth day.Rats from the STZ control group were administered intraperitoneally 1.2 mL of 0.1 mol/L,pH 4.5,citrate buffer.The capsaicin control group received subcutaneous injections of 0.4 mL of 1％ capsaicin at 20 mg/kg for 3 consecutive days,after which 1.2 mL of 0.1 mol/L,pH 4.5,citrate buffer was administered intraperitoneally.The rats were sacrificed at the tenth week after model establishment and retinal specimens were prepared for the apoptosis assay by TUNEL staining and the quantitative analysis of caspase-3 activity.Expression of CGRP in the retina and serum was detected using ELISA.The use of experimental animals followed the Regulations for the Administration of Affairs Concerning Experimental Animals by State Science and Technology Commission.Results Retinal cell apoptosis was mainly localized to the retinal ganglion cell (RGC) layer.The apoptosis rate of RGCs was (43.4±5.0)％ in the DR model group and (30.0±5.1)％ in the capsaicin pretreated group,showing a significant difference (t =5.930,P＜0.01).Compared with the DR model group and capsaicin pretreated group,the apoptosis rates of the DR control group (12.4±9.9) ％ and the capsaicin control group (17.6-±6.1) ％ were significantly lower (t =8.800,t =4.925,P＜0.01).The apoptosis rate of the plain control group was (16.2±6.9)％,exhibiting significant differences in comparison with the DR control group and capsaicin control group (t =-0.989,t =0.951,P＞0.05).The specific activity of caspase-3 was (2.19±0.86) in the DR model group and (1.96±0.56) in the capsaicin pretreated group,presenting a significant difference (t =-0.515,P＜0.05).Those of the DR control group and capsaicin control group were (1.47±0.14) and (0.74±0.27),respectively,with considerable decline in comparison with the DR model group and capsaicin pretreated group (t=2.142,t=2.797,P＜0.05).The retinal and serum CGRP levels were (424.4±44.2)and (148.8±39.1) ng/L,respectively,displaying significantly lower levels than (543.2±74.4) and (237.5±78.7) ng/L (t =3.070,2.359,P＜0.05) from the capsaicin pretreated group.Conclusions Apoptosis of retinal ganglion cells occurs in the STZ-induced diabetic rats.Pretreatment of capsaicin reduces retinal cell apoptosis,which may be associated with an increase of CGRP in the retina.

AIM:To study the affect of two kind preparations of ammonium glycyrrhizinate on serum extracellular matrix level of chronic viral hepatitis.　METHODS: Seventy patients with chronic viral hepatitis were randomly divided into two groups. The first group of 41 patients (M36,F5;age 47a±s 13a) was treated with diammonium glycyrrhizinate 0.15 g, iv, gtt, qd×30 d. The second group of 29 patients (M23,F6; age 48a±12a) was treated with monoamonium glycyrrhizinate 0.2 g iv, gtt, qd×30 d. Serum ECM levels were assayed using RIA method.　RESULTS: After treatment the serum ECM levels of both groups reduced remarkably and there was no differance in the reduction of serum ECM levels of the two groups except LN (P<0.05, P<0.01).　CONCLUSION: Both preparations of glycyzzhizinate have the efficacy to reduce serum ECM level of chronic viral hepatitis patients and play some role in anti-hepatic fibrosis. Diammonium glycyrrhizinate is more potent than monoammonium glycyrrhizinate.