Carrying out targeting an oncolytic adenovirus strategy in gene therapy of pancreatic cancer is a new direction.Currently,related research including vitro test and animal models vivo test,targeted strategies on molecular biology and gene level are carried out.Some of oncolytic adenovirus drugs have entered phase Ⅲ clinical trials.Oncolytic adenoviruses alone or in combination with other treatments,can enhanced anti-tumor effect.

Objective To investigate morphologic, structural and functional characteristics of cardiomyocytes from neonate rats and to set up a desirable technique for isolating and purifying the cardiomyocytes from neonate rats. Methods Using trypsin-digestion, mechanical separation, twice seedings and bromodeoxyuridine (BrdU)-treatment, the cardiomyocytes were isolated and purified from the hearts of neonate rats at 1-7 days after birth. Shapes and spontaneous pulsation of the cells were viewed. The cells were identified with cardiac isoform of tropnin T(cTnT) immunostaining. Ultrastructural features of the cells were examined with in situ transmission electron microscopy. Responses of the cells to adenine and isoprenaline were also examined. Results More than 95% cells isolated from the hearts of neonate rats are cardiomyocytes. The vital cells are more than 95%. Neonate rat cardiomyocytes include short columnar or rhabdoid cells and irregular cells. The most rhabdoid cells from the rats at 1-3 days after birth present the ultrastructural features of immature cardiomyocytes. The rhabdoid cells from the rats at 6-7 days after birth have some ultrastructural features of mature cardiomyocytes. Comparing with the cells at 1-3 days after birth, cTnT expression in the cells is slightly enhanced, the transverse striation was obvious. The irregular cells contain less bundles of myofilaments, the filaments are arranged irregularly. There are a few small cells which are in undifferentiated state. More than 80% cells show spontaneous pulsation at 72 hours after incubation. After treatment with adrenine and isoprenaline, the number of the cells with spontaneous pulsation increases and the intension of spontaneous pulsation is enhanced. The responses of the rhabdoid cells from the rats at 6-7 days after birth to adenine and isoprenaline are much stronger. Conclusion There are two kinds of neonate rat cardiomyocytes. They are different in ultrastructures, spontaneous pulsation and responses to adenine and isoprenaline. The cardiomyocytes from rats at 6-7 days after birth are suitable for experiments in vitro as mature cardiomyocyte. The method set up in this experiment is desirable for culture of neonate rat cardiomyocytes.

Purpose To analyze the 64-row spiral CT manifestations and evaluate the diagnostic value in early primary ureteral carcinoma.Materials and Methods Fifteen cases of early primary ureteral carcinoma proved by surgery and pathology were reviewd.Unenhanced scan,enhanced scan in arterial phase,parenchymal phase,delayed phase and CPR construction were performed in all patients.MIP were performed in 10 cases.Results ① the localization of lesions:7cases were located at the right ureter and 8 cases at the left.2 cases were located at the upper portion of the ureter,6 at mid portion,and 7 at lower portion;② CT manifestations:8 cases showed irregular thickened wall and central lumen stenosis,4 cases eccentric soft tissue mass in lumen and crescent or linear vestigial lumen,3 cases soft tissue density and obsolescent lumen;③the enhanced features:the tumor was demonstrated apparent and uniform enhancement in 13 cases,inhomogeneous enhancement in 2 cases after administration of contrast medium;④ the accompanied signs:proximate renal and ureteral presented distention,dropsy in different degrees,5 cases appeared delayed development.Conclusion 64-row spiral CT volume scan and 3D reconstruction with multiplane and multiorientation,combined with axial enhanced scan,can show lesions dimensionly and increase the dignostic accuracy in early primary ureteral carcinoma,which has an important value.

Objective　To investigate the alteration and clinical significance of NK cell and T lymphocyte subpopulatien in patients with rectal carcinoma. Methods　 The numbers of NK cell and T lymphocyte in 26 healthy persons and 35 rectal carcinoma patients were detected by 3H-releasing method and FCM. Results　NK cell and CD3, CD4, CD4/CD8 were decreased significantly in patients with rectal carcinoma (P<0.05), which was positively correlated with Dukes staging (P<0.01), and was inereased after redical or palliative operation (P<0.05), but NK cell and CD3, CD4, CD4/CD8 were further decreased in patients with unresectable tumor after operation (P<0.05). Conclusions　The immunity of rectal patients was decreased with the development of the disease, and it will be improved after radical of palliative operation.

BACKGROUND:At present, an increasing number of bone graft materials are inactivated using peracetic acid-ethanol solution, but there is no report on whether virus inactivation using peracetic acid-ethanol solution has effects on osteogenic induction of demineralized bone matrix. OBJECTIVE: To explore the effects of virus inactivation using peracetic acid-ethanol solution on the osteogenic activity of demineralized bone matrix. METHODS: Long bones of Sprauge-Dawley rats were selected to make demineralized bone matrix meal. A part of bone meal was placed into gelatin capsules and sterilized by60Coγ irradiation as control group; another part of bone meal was placed into gelatin capsules folowing virus inactivation using peracetic acid-ethanol solution, and then sterilized using60Coγ as experimental group. After that,40 Sprauge-Dawley rats were enroled, and gelatin capsules in the experimental and control groups were respectively implanted into the bilateral psoas muscles of the lumbar spine. At 2, 4, 6, 8 weeks after implantation, the bone grafts were removed for gross and histological observations. RESULTS AND CONCLUSION:At 8 weeks after implantation, the bone mass in the experimental group was not intact in shape with scattered particles, and under light microscope, a few of osteoblasts and new vessels were seen; the bone mass in the control group had hard texture and complete morphology, and under light microscope, mature bone trabeculae wrapped with osteoblasts and new vessels were visible and there were ful of fat cels and bone marrow cells between the bone trabeculae. The number of new microvessels in the experimental group was lower than that in the control group at different time (P < 0.001); at 8 weeks after implantation, the calcium content, alkaline phosphatase content, inorganic phosphorus content and new bone growth rate were all lower in the experimental group than the control group (P < 0.001). These findings indicate that peracetic acid-ethanol for virus inactivation has some negative effects on the osteogenic induction of demineralized bone matrix.

Objective To investigate the interaction between endometrium and embryo under the co-culture condition during the planting window stage. Methods Twenty patients who cancelled transplant for OHSS in the Reproductive Center of the second affiliated hospital of Zhengzhou university were enrolled.The discarded embryos were used to build the embryos co-culture system (Group A), with a single membrane (group B) and a single embryo(group C)as the control group. Levels of LIF and IGF expression and embryo growth were checked on 3, 4,5,6,7 day post-oocyte retrieval. Results Expressions of LIF mRNA and IGF mRNA in Group A were significantly higher than those in Group B. Embryo growth in the Group A was better than that in Group C. Conclusion Co-culture of endometrium and embryo supports the development of embryo and improves the receptivity of endometrium.

Tupaiidae has been considered as low primate by most scholars. Focal cerebral ischemia study on tupaiidae has not been reported. Acute focal cerebral ischemic model in tupaiidae was produced by cauterizing the middle cerebral artery. The results indicated that after 15 minutes and 6 hrs occlusion of the middle cerebral artery, the rCBF's in the ischemic cortex were reduced respectively to 36.7% and 39.8% of those before occlusion, and the amplitudes of SFP to 21.83% and 36.78%. After 6 hrs of ischemia, a decrease in ATP content to 5.2 times that of the control, and an increase in AMP to 4.4 times were measured. Calcium and MDA contents in ischemic cerebral cortex increased (P

Formaldehyde is a chemical which is traditionally used as disinfectant and preservative. Recently,formaldehyde becomes raw material of adhesive which is widely used for indoor decoration. It has been recently reported in many animal experiments that formaldehyde had adverse effects on male reproductive endocrine,sperm quantity and quality,and but few reports were obtained about the adverse effects of formaldehyde on male reproductive system in human beings. Damage to genetic material,induced by lipid peroxidation and cell apoptosis is the possible mechanism of toxic effect. Male reproductive toxicity and mechanism of formaldehyde were discussed,and the recent researches were reviewed in the present paper.

Estrogen has widespread biological actions. Besides sexual organs, estrogen plays an important role in cardiovascular system, central nervous sy s tem and bone tissue. However, the mechanisms of estrogen action are very complex and not fully understood. The actions of estrogen are not identical and even co mpletely different in some organs system. In this review, we will focus on the n ew development of molecular mechanisms of estrogen action.

Polycystic ovary syndrome (PCOS) is a disease of dysgenesia and dysmetabolism. Its clinical manifestations include hyperandrogenism, ovulation failure, hyperinsulinemia, elevated serum LH level, obesity and sterility. Histological examination of ovary reveals polycystic changes. It is difficult to carry out clinical research because of its complicated pathogenesis, pathophysiology and multiple biochemical changes and clinical manifestations. It is necessary to study PCOS using animal models. In this article, the authors introduce some methods of establishing animal models of PCOS, such as androgen administration (including testosterone propionate,dehydroepiandrosterone), combination of insulin with HCG, use of estradiol valerate,combination of progestrone with HCG, aromatic cyclase inhibitor method,and so on, and review the effects of traditional Chinese medicine on the intervention of PCOS.