Objective To discuss the clinical effect and safety on rosiglitazone applied to patients with early type 2 diabetic nephropathy.Methods Ninety-six patients with early type 2 diabetic nephropathy were divided into the control group(n=48) and the research group (n =48).The patients of the control group were given mefformin treatment, while of research group were given rosiglitazone, both the courses were three months.The urinary albumin excretion rate (UAER), 24 h urine trace albumin (UAE), serum creatinine clearance (SCr) , fasting plasma glucose (FPG), postprandial blood glucose (2 hPG), glycosylated hemoglobin (HbA 1 c), triglycerides (TG), cholesterol (TC), low density lipoprotein (LDL-C), high density lipoprotein (HDL-C) before and after treatment and clinical effect between the two groups were compared.Results The HbA1c, FPG, 2 hPG, UAER, UAE, TC, TG of after treatment of all patients decreased obviously,while the HDL-C level increased remarkably, and compared with control group the differences were significant (HbA1 c: (7.32±0.84)％ vs (7.56±0.98)％, FPG: (8.02± 1.42) mmol/L vs (8.16± 1.54) mmol/L, 2 hPG: (11.54±2.11) mmol/L vs (12.02±1.97) mmol/L,UAER: (67.34±6.45) mg/24 h vs (52.56±5.35) mg/24 h,UAE: (108.64±22.64) mg/d vs (68.84± 11.43) mg/d, TC : (5.44± 0.72) mmol/L vs (4.76± 0.51) mmol/L, TG: (2.04± 0.53) mmol/L) vs (1.73±0.46) mmol/L);t =-4.172,-3.973,-4.026,-4.263,-6.634,-5.737,-5.635, -4.735,-4.633;P＜O.05).While there were no statistical significance about SCr before and after treatment(P ＞0.05).The total clinical effect of the research group was obviously higher than that of the control group (87.5％ (42/48) vs 66.7％ (32/48), x2 =5.363,P =0.035).There were not obvious adverse reaction occurred during treatment for all patients.Conclusion Rosiglitazone can effectively reduce the blood glucose in patients with early type 2 diabetic nephropathy and reduce urinary protein excretion, the effect is more obvious than that of metformin.

The scar formation and chronic ulcer development are the iain sequelae faced by surgeons in the treatmemt of wounds. Therefore,the prevention and treatment of these sequelae are the main tasks for clinicians.In this paper,the current research concerning both sequelae is reviewed.The authors emphasize that the use of some high technologiesl, such as stem cell technology, clone technology and tissue engineering may bring the hope in improving the treatment and prevention of these sequelae.

The cytokine-receptor- heparin sulfate functional complex combined by cytokines, cytokine receptors, and heparin sulfate chains formed by concatenation of heparin sulfate proteoglycans (HSPG), an important component of extracellular matrix and modified by some relative enzymes, can regulate the density of cytokine receptors and their intracellular signal transduction. This article focused on the regulatory function of this complex. Many morphological abnormalities and diseases occur when the complex is dysfunctional.

Angiopoietin family is a recently discovered type of cellular factors that specifically bind to the TIE-2 receptors located exclusively in endothelial cell membrane. The protein structures of this family members are similar. They can be structurally divided into three domains: an N-terminal region lacking homology to any known structures, an alpha-helical rich coiled-coil segment, and a fibrinogen-like domain. The distribution and biological activity of these factors are different in organism. Angiopoietin-1 as a agonist, mostly locates in close proximity with vascular endothelial cells, keeps the stability of blood vessels, enhances the affinity of vascular endothelial cells with surrounding cells and matrix, decreases the leakage of vessel. Ang-2 is a naturally occurring antagonist of Ang-1, exists in the angiogenic remodeling region and is related to the decrement of the stability of vessel. Ang-3 is widely distributed in multiple mouse tissues, while Ang-4 is expressed only in lung. Although Ang-3 and Ang-4 are structurally diverged from each other, they appear to represent the mouse and human counterparts of the same gene locus. Biological functions of Ang-3 and Ang-4 have not been elucidated yet. Angiopoietin family has potentially clinical applications for incurring illnesses which lead to vessel wound and vascular abnormal development.

The basic concept of gene therapy is to introduce a therapeutic gene into a cell, whose expression can improve to healing of wound. To achieve this goal, the suitable therapeutic gene has been selected and delivered into the reparative cell, which is becoming a focal point works about gene therapy in wound healing. There have been several different therapeutic genes and gene transfer strategies that have been used in models of wound healing. This article discusses several methods that have been used to deliver genes encoding growth factor proteins, stem cells into wounds and the advantages/disadvantages of each approach. We hope a safe vectors system to deliver the effectual transgene in wound healing.

〔Abstract〕 The paper analyzes problems existing in the traditional outpatient diagnosing distribution process of hospitals , redesigns and optimizes the triage process .It designs a unified diagnosing distribution system , introduces the advantages , system composition , queuing rules and treatment priority strategies of the optimized process , and illustrates the application effects of the diagnosing distribution system with the outpatient of obstetrics and gynecology department of a large grade -III level-a hospital as an example .

BACKGROUND: The implanted cartilage calls can synthesize cartilage matrix as cartilage in cartilage tissue enginsedng, and the density of implanted cells is the key point.OBJECTIVE: To evaluate the effect of cell seeding concentration on the chondrogenic differentiation of the adipose dadved sromal cells (ADSCs).DESIGN, TIME AND SETTING: The in vitro cellular-scaffold observation was performed at the cytobiological laboratory of China Medical University from November 2007 to July 2008.MATERIALS: Six male SD rata with clean grade were supplied by the Experimental Animal Center of China Medical University.METHODS: Totally 5 g/L type ; collagen solution and 20 g/L chitosan was mixed in a mould with volume ratio of 7:3, after lyophillization, it was cut into pieces with 5 mm ～ 5 mm x 2 mm, followed by crosslinking with ethanol contained of 2% chondroitic acid at room temperature. After washing with double distilled water and freeze drying, the chitosan-collagen-chondroitin sulfate copolymar matrices scaffolds were harvested. ADSCs isolated from rat inguinal fat pads were digested with collagenase and trypsase. The prepared scaffolds were randomly divided into 3 groups, and the third passage cells with density of 2×10 9/L,2×10 109/L, and 2×10 11/L were seeded into chitosan-coflagen-chondroitin sulfate scaffolds, and cultured in chondrogenic medium for 3 weeks.MAIN OUTCOME MEASURES: The expression of cartilage specificity gene was detected by hematoxylin-eosin staining, type Ⅱ collagen immunohistochemical staining and RT-PCR.RESULTS: Hematoxylin-eosin staining showed that after 3 weeks of culture, the cell proliferated and differentiated well, especially in 2x101～/L group, more extrocelluer matrices were produced and cartilage lacuna-structure could be seen. The type Ⅱ collagen was positive expressed in each group, which showed a gradually increasing tendency with the cell seeding concentration increasing. RT-PCR showed that the expression of proteoglycen and type Ⅱ collagen mRNA were slowly increased. However the expression of Ⅹ collagen mRNA was decreased with increasing cell seeding concentration.CONCLUSION: The chitosan-collagen-chondroitin sulfate copolymer matrices can provide an appropdate environment for the generation of cartilage-like tissues and high call seeding concentration of 2×1010/L facilitate ADSCs to differentiate into cartilage.

To explore the activities of signal transduction pathway involved in heat-stressed fibroblast in vitro. Human dermal fibroblasts were cultured in Dulbecco′s modified Eagle′s medium with 5% calf serum at 5%CO 2 in a water-saturated atmosphere. Cultured cells were heated to 45℃ for 10min. Western blotting was used to detect ERK1/2 and JNK expression, and the expression of caspase-3 protein was observed by immunoflurescence technique. The results showed that the MAPKs signal transduction pathway was activated in heat-stressed fibroblasts. The expression of JNK reached the peak at 60min, then maintained up to 180min. The expression of ERKs peaked at 30min, then lowered. The expression of caspase-3 was weak at 30min after heat-stress, and became evidently strong at 60min. The signal pathway of ERKs and JNK played important roles in the changes in biologic characteristics of fibroblasts after heat-stress.

To investigate the distribution of epidermal stem cells in regenerating wound tissues, and to elucidate the role of epidermal stem cells during wound repair. 80 circular full-thickness wounds were produced on both sides of the back in 20 male Wistar rats labeled 60 days previously with 5-Bromodeoxyuridine (BrdU) (4 wounds in each animal). Then these 80 wounds were randomly divided into 2 groups as follows: group A: with topical treatment of epidermal growth factor (n=40) and group B: no-treatment (n=40). BrdU, ? 1 integrin and keratin19 (K19) were employed to determine the epidermal stem cells with streptavidin-peroxidase (SP)immunohistochemical method, and the speed and quality of epithelialization were determined with routine histological methods with HE staining on the 3rd, 7th, 14th, and 21st day after the wounding. Results showed that the healing rate of wounds was 80% in group A (32/40) and 60% in group B (24/40). No cells with positive immunostaining for BrdU, ? 1 integrin, or K19 were found in the granulation tissue of all wounds in both groups during the healing process. However, a few BrdU, ? 1 integrin and K19 positive cells, bearing no anatomic relation with the epidermal stem cells in the basal layer, were found scattering in the stratum spinosum and stratum granulosum of the epidermis on the wound edges. The results suggested that epidermal stem cells appearing on the wound edges were the main source of re-epithelialization of granulating wounds.

The differentiation of cell is a very important biological process. In this paper, the current understanding and advances in research on dedifferentiation are reviewed. Giving more efforts to study this subject may help us disclose the mechanisms and treatment for some diseases.