Objective To investigate the effect of cobalt chloride on tumor cell proliferation and apoptosis in vitro, to explore the reasonable strategy of chemical hypoxia induced by CoCl2. Methods Two tumor cell lines (A549 and HeLa) were respectively exposed to CoCl2(0.05～2 mmol/L) for different time period (4～48 h), cells viability、proliferation and apoptosis were maesured by MTT and FCM methods. HIF-1? and related apoptosis proteins expression were detected by Western blot. Results Cells viability was weakly changed in low concentration(≤200 ?mol/L)of CoCl2 within 24 h. However, higher dose or prolonged challenge of CoCl2 significantly decreased cell survival rate (P

ObjectiveTo observe the influence of polyethylene glycol-conjugated hemoglobin (PEG-Hb) solution combined with cisplatin on the expression of erythropoietin/erythropoietin receptor (EPO/EPOR) and tumor angiogenesis in cancer treatment.MethodsHeLa cells were injected subcutaneously into the right oxter of 3-4 weeks old BALB/c nude mice to establish cervical tumor xenograft model.Then animals were randomly assigned to 4 groups (n=10) and treated respectively:group 1(control); group 2,cisplatin (5 mg/kg); group 3,PEG-Hb (0.6 g/kg); group 4 cisplatin (5 mg/kg) plus PEG-Hb (0.6 g/kg).The volume oftumors in each groups were measured in 4 weeks treatment period.Efficacy was measured as percent tumor growth inhibition (TGI) relative to salinetreated group.CD31 was detected by immunohistochemistry and its expression was identified as microvascular density (MVD).Expressions of hypoxia inducible factor-1α(HIF-1α) and EPO/EPOR in tumor tissues were analyzed by irnmunohistochemistry.EPOR protein level was tested by western blot.ELISA method was used in measuring EPO concentration in serum.ResultsTumor volume was significantly decreased in group 4 compared with other groups.Immunoreactivity data demonstrated lower expression of CD31,HIF-1α and EPO/EPOR in group 4.The expression of EPOR in the endothelial cells was also significantly decreased in group 4.Western-blot data indicated lower EPOR protein level in group 4.Serum level of EPO was also decreased in group 4.ConclusionPEG-Hb plus cisplatin is benefit to tumor tissue oxygenation,therefore it can inhibit the tumor angiogenesis and down regulate the erythropoietin/erythropoietin receptor system.The result can provide more evidence for the enhanced sensitivity effect of the artificial oxygen carrier in cancer therapy.

Adolescent ; Amenorrhea ; diagnosis ; etiology ; Androgen Antagonists ; pharmacology ; Androgens ; blood ; Contraceptive Agents ; pharmacology ; Female ; Humans ; Hyperandrogenism ; complications ; Hypoglycemic Agents ; therapeutic use ; Insulin Resistance ; Luteinizing Hormone ; blood ; Menstruation Disturbances ; diagnosis ; etiology ; Obesity ; complications ; Ovary ; diagnostic imaging ; pathology ; Polycystic Ovary Syndrome ; diagnosis ; etiology ; therapy ; Ultrasonography ; Young Adult

Arteriovenous Malformations ; therapy ; Child ; Female ; Humans ; Pulmonary Artery ; abnormalities ; Pulmonary Veins ; abnormalities ; Septal Occluder Device

Humans ; Infant, Newborn ; Male ; Protein C ; metabolism ; Protein C Deficiency

At the beginning of the 1980s, a concept of viable but non-culturable(VBNC) was suggested. VBNC is a survival strategy adopted by microorganisms when they are exposed to environmental stress. This article try to make a summary of research of the conditions of VBNC formation, recovery of culturability and methods of VBNC cells detection. In addition, introduces the first growth factor of microorganisms-Rpf.

The viable but noncuturable (VBNC) state is a survival strategy when bacteria are exposed to en- vironment stress. The VBNC state is part of the life cycle of non-differentiating bacteria, and it has a far-reaching impact on traditional bacteriology. Cells in the VBNC state fail to grow on the routine bacterio- logical media, here its significance in human health and environment science are detailed. Cells entering the VBNC state exhibit dwarfing and a number of metabolic changes in respiration rates and macromolecular synthesis. This paper summarized the variations in DNA and protein comparing to the culturable cells. We also discussed the ability of cells to resuscitate from the VBNC state and return to an actively metabolizing and culturable form. Some new methods for monitoring the VBNC state were listed. Finally the future was suggested.

0.05).92.7%of the objects knew that passive smoking was harmful.71.9%knew that passive smoking made people suffering from cardiopathy more possibly.74.9%knew that the wife whose husband smoked were easier to catch lung cancer.And 84.4%knew that the child whose parent s smoked more possibly took asthma or respiration disease. The correct rates of the four knowledge points were different among different gender and the degree of education,which was higher in female than in male,and higher in high education degree than in the other(P

Objective To investigate the effects of osteopontin (OPN) antisense oligodeoxynucleotide (AS-ODN)on OPN mRNA expressions and adherence to collagen gel of rat renal mesangial cell line (1097). Methods One AS-ODN complementary chain to rat OPN cDNA sequences was designed and synthesized. All nucleotides of different kinds of oligodeoxynucleotide (including antisense, sense and mismatch sense) were modified with phosphrothioate. All the ODNs were mixed with cationic liposome(DOTAP) respectively. The cultured 1097 cells were incubated with different concentration of ODN at 37t for 48 hours, then total RNA was extracted from cultured cell line with Trizol reagent. OPN mRNA expression was detected with RNA dot blot and RT-PCR. The cell adhesion ability was measured with collagen gel attachment lest. Results OPN mRNA expression of mesangial cells was higherly upregulated in the medium with calf serum compare to that in the medium without serum. AS-ODN could suppress the expression of OPN mRNA in mesangial cells with dose-dependent and its lowest inhibitory concentration was 2. 5 ?mol/L, but mismatch ODN or sense ODN have no inhibitory effects on the OPN mRNA expression of mesangial cells even if at a high ODN concentration of 30 ?mmol/L. AS-ODN-treated cells weakly adhered to the collagen gel and could be easily detached off. The mesangial cells treated with mismatch ODN or sense ODN still had a good adherent ability to collagen gel. Conclusions Calf serum can induce rat renal mesangial cells higherly expressing OPN mRNA. Osteopontin antisense oligodeoxynucleotide can specifically suppress mesangial cells OPN mRNA expression and adhension to collagen gel.

Objective: Study the morphology and kinetics characters in breast diseases by using helical CT,to assess the value of differential diagnosis in benign and malignant breast diseases.Methods: Forty-three focuses in thirty-eight patients were detected by using double row detector CT with histopathologic correlation.Analyzed the characters of morphology,the time-density curve and the enhancement rate of all focuses.Results: Of the 43 focuses,breast cancers were twenty-eight and benign diseases were fifteen. There were eleven pieces and thirty-two masses.Lobulation signs and spicule signs were twelve respectively,among twenty-one malignant masses.One had spicule sign and two had lobulation sign among eleven benign mas-ses.Twenty breast cancers had Ⅲ type time-density curve,eleven benign diseases had Ⅰ type curve,and there were some overlaps on Ⅱ type curve.Enhancement rate(E) reflected the blood kinetics of breast diseases.E 1min and E 3min were better than E 3min in differentiating benign and malignant breast diseases.Conclusion:Lobulation signs and spicule signs are more often found in malignant lesions than in benign lesions.Early enhancement rate and time-density curve present some important information in differentiation.Synthesizing all these specialties can promote the diagnosis accuracy.