ABSTRACT
Objective To study the radioprotective effects of ultra-small carbon quantum dots (CQDs) in mice in vivo,and to reveal the protective mechanism,as well as to study the body immune response to CQDs and the toxicity in vivo.Methods Mice were injected with different concentrations of CQDs solution.Mice models of systemic radiation injury were constructed by high dose gamma rays radiation.The 30-days survival rate,bone marrow DNA,femoral bone marrow nucleated cells (BMNC),tissue superoxide dismutase (SOD) and malondialdehyde (MDA) were measured to evaluate the radioprotective effects of CQDs,and to investigate the possible protective mechanism.The toxicity of CQDs in vivo was studied by measuring the changes of body weight,liver index and spleen index before and after injections of CQDs in mice.Results CQDs showed obvious radioprotective effects on mice in vivo.Compared with the control group,the 30-days survival rate of irradiated mice treated with CQDs increased from 0％ to 40％.CQDs could effectively reduce the hematopoietic system damages caused by radiation,and increase the level of bone marrow DNA,femur BMNC,liver and lung SOD,as well as reduce the production of MDA in liver and lung.The results of immunological reaction tests showed that CQDs had less toxicity in vivo and did not trigger the body immune response.Conclusions CQDs has tremendous application prospects in the field of radiation protection.This study can provide new ideas for the application of new nano-materials in medical field.
ABSTRACT
Aim To test the skin healing and repairing efficacy and the mechanism of Hibiscus rosa-sinensis L bud extract by using the animal models. Methods KM mice were randomly divided into three groups:the model group, the positive control group, and the n-bu-tyl alcohol extract ( HrBN) group. Using the boils and carbuncles model, the healing condition of all the animals were observed. KM mice were kept in the SPF condition room and divided into five groups: the model group, the positive control group, and the low, middle, high dose groups. Using the full-thickness loss model, the repairing results of all the mice were ob-served. Through the antimicrobial test, the results of MIC and inhibition zone were obtained. The carbon clearance test was used to collect the blood at the time 5min and 15min, and get the liver and spleen, and the results of K andαwere obtained. Results In vivo ex-periments showed there was significant difference be-tween groups;the HrBN extract had the outstanding ef-ficacy in healing and repairing skin boils and full-thickness loss models. It had higher recovery rate than other ethanol extract, such as ethyl acetate extract and chloroform extract. In vitro experiments showed that the HrBN extract, ethyl acetate extract ( HrBE) ,AB-8 macroporous resin 30% alcohol part and 60% alcohol part had obvious antimicrobial efficacy. The carbon clearance test showed HrBN had a good effect in im-proving immune function, and it can increase the K and α. Conclusion HrBN in animal models exerts good skin healing and repairing efficacy, which might be related to its antibacterial activity and immunologic enhancement function.
ABSTRACT
Objective To analyze Mycoplasma detection and drug sensitivity test of 3 127 urogenital tract infection women ,and to provides important basis for clinical diagnosis and treatment .Methods Mycoplasma detection and drug sensitivity of 3 127 uro-genital tract infection women were detected .Results Among 3 127 cases ,1 800 patients were detected Mycoplasma ,and the posi-tivity was 57 .6% .The infection rates of Ureaplasma urealyticum(Uu) ,Mycoplasma hominis(Mh) and Uu+ Mh mixed infection were 46 .2% ,1 .2% ,10 .1% .Uu was sensitive to minocycline ,doxycycline and clarithromycin .Mh was sensitive to minocycline , doxycycline and josamycin .Uu+ Mh mixed infection was sensitive to minocycline ,doxycycline and josamycin .Conclusion Myco-p lasma infections have been the major pathogen of urogenital tract diseases ,the clinical treatment should be based on drug sensitivity test .