RESUMEN
ObjectiveFocused on the laboratory animal domestication and breeding of domestic cats, to explore the feeding management methods and breeding techniques of experimental cats. MethodsSeven Chinese garden cats from three litters were introduced from the rural suburbs of Guangzhou, and a breeding seed colony was established. The cats were domesticated in captivity, bred, closed breeding and transmission according to the feeding and management methods of laboratory animal. The population reproduction, the number of pregnancies per year, the litter season, the birth and weaning quality of the cats, and the survival rate of weaning were statistically collected. ResultsThe young breeding cats were able to adapt to the cage feeding management. In the transmission breeding and the expanded breeding colony, the number of female cats pregnant with one, two or three litters a year accounted for 63.2%, 26.3% and 10.5%, respectively. The proportions of litters born from the 1st to the 4th quarters were 20.7%, 20.7%, 27.6%, and 31.0%. A total of 29 pregnancies and 101 kittens were got from 19 female cats, with an average of (3.5±1.33) kittens per litter. The birth weights of female and male cats were (89.31±13.69) g and (93.47±15.12) g, respectively. Sixty-seven kittens survived from weaning. The average survival rate was 60.86%, and the weaning weights of female and male cats were (361.62±82.77) g and (376.0±91.71) g, respectively. ConclusionDomestic Chinese garden cats can adapt to laboratory animal feeding and breeding rules, and have strong fertility. They can normally pregnant and breeding throughout the year. The kittens grow to 5-6 months of age can meet the weight requirements for the examination of pharmaceutical hypotensive substances, and can be used as experimental cats for pharmaceutical examination with clear origin.
RESUMEN
OBJECTIVE:To adopt gel method for the determination of bacterial endotoxin in Fat emulsion(10%)/amino acid (15)/glucose (20%) injection. METHODS:According to the gel method in term ofbacterial endotoxin test methodin Chinese Pharmacopeia(2015 edition),the maximal valid dilution(MVD)of samples were determined through interference test and the vali-dated. The results were compared with chromogenic method. RESULTS:In gel method,the interference to agglutination reaction of TAL and bacterial endotoxin can be excluded when samples were diluted 24 times or less. In chromogenic method,the samples should be diluted 76 times or less. CONCLUSIONS:Gel method can be used for bacterial endotoxin test of Fat emulsion(10%)/amino acid(15)/glucose(20%)injection.
RESUMEN
OBJECTIVE:To establish the detection method for pyrogen-related factor interleukin 1β(IL-1β)through optimiz-ing detection condition,and to conduct preliminary methodology study. METHODS:The in vitro fresh human whole blood detec-tion method was used. The bacterial endotoxin standard solution(5,2,0.8,0.32 EU/ml)were added into diluted blood;using di-luted RPMI 1640 as blank control,the content of IL-1β in blood sample was determined by ELISA after incubation. The relation-ship of the addition of different attenuants(RPMI 1640 culture,sterilized normal saline)and fetal bovine serum,final dilution vol-ume fraction(40%,20%,10%and 8.3%)and storage duration(2,5,6,8,26 h)with the contents of endotoxin IL-1βwere in-vestigated,and related coefficient and detection limits were calculated. Different dilution times of Qingkailing injection and Ginaton injection samples and interference solutions were added into diluted blood to detect their recovery. RESULTS:The results indicated that RPMI 1640 media and 40% diluted blood was more sensitive(detection limit was 0.128 EU/ml,r=0.993);while the addition of fetal bovine serum didn’t influence the results. The detection limits of blood sample storied at 4 ℃ for 26 h were 0.128 EU/ml (r>0.990). When Qingkailing injection and Ginaton injection were diluted 10,32 and more times,the detection method was not interfered and the recovery ranged 68%-118%. CONCLUSIONS:Established in vitro fresh human whole blood detection method can be used for the detection of pyrogen,and provides trial evidence for the pyrogen detection of TCM injection.
RESUMEN
When some testing institutions performed biological evaluation to the disposable medical syringe piston, cytotoxicity was found. According to the biological evaluation testing Selection Guide proposed by Ministry of Health and the Comments of Sample Provider, We performed biological evaluation to one sample by using 5 tests of basic biological evaluation. Cytotoxicity was found, which was probably caused by the residue of the lotion. This research provides reference for objective evaluation of disposable medical syringe piston and safe guarantee of the product.
Asunto(s)
Pruebas Inmunológicas de Citotoxicidad , Equipos Desechables , JeringasRESUMEN
OBJECTIVE: To establish bacterial endotoxin test for adenosine disodium triphosphate (ATP) raw material by TAL method. METHODS: The sensitivity of TAL and the limit of endotoxin were reviewed and confirmed. Preliminary interference test was used to determine the dilution ratio of samples and interference test was applied to determine maximum non-interference concentration. Bacterial endotoxin test was performed on 11 batches of samples according to the method stated in Chinese Pharmacopoeia (2005 edition). RESULTS: The sensitivity of TAL was up to the standard and the limit of endotoxin in samples were 2.0 EU?mg-1. The maximum non-interference concentration was 0.125 mg?mL-1. Results of bacterial endotoxins test of 11 batches of samples were all in line with the standard. CONCLUSIONS: It is feasible to detect the bacterial endotoxin of ATP raw material by TAL methods, which can replace pyrogen test.