RESUMEN
The hypoxanthine-guanine phosphoribosyl transferase (HGPRT) gene mutation is responsible for gouty arthritis, kidney stone, and Lesch-Nyhan Syndrome (LNS). It has been reported that the expression of HGPRT is decreased or even absent in these diseases. Rabbits are an ideal model for studying the pathology of these diseases. Therefore, the development of an HGPRT-knockdown rabbit model will be highly beneficial m such studies. Stable HGPRT-knoekdown transgenie fibroblast lines were generated by transfecting rabbit fibroblasts with RNA interference (RNAi) plasmids. Polymerase chain reaction (PCR) analyses indicated that the average positive rate was 83.3%. The mRNA and protein levels of HGPRT in the transgenic fibroblast lines were significantly lower than that in the control. Transgenic rabbit blastocysts were derived after performing nuclear transfer. The results show that RNAi can be used to stably knock down expression of the HGPRT in rabbit fibroblasts and further improvements in related technologies will facilitate the use of this method for the generation of HGPRT-knockdown rabbits.
RESUMEN
Embryonic stem cell is promising for regenerative medicine. However, its application is hampered by the utilization of eggs in most established methods. Recently, a new pluripotent stem cell establishing method was reported that, mouse and human differentiated cells could be induced reprogrammed into a pluripotent state by expressing exogenetic stem factors such as Oct4, Sox2, et al, through retroviral transduction. This approach avoiding egg use is a great breakthrough not only in stem cell technology but also present theory hypothesis of reprogramming. Here these works were reviewed in this article. Both the mechanism of induced reprogramming and the prospects of induced pluripotent stem cells were discussed.
Asunto(s)
Animales , Humanos , Diferenciación Celular , Genética , Células Cultivadas , Reprogramación Celular , Genética , Factor 3 de Transcripción de Unión a Octámeros , Metabolismo , Células Madre Pluripotentes , Biología Celular , Retroviridae , Genética , Factores de Transcripción SOXB1 , Metabolismo , Transducción GenéticaRESUMEN
ObjectiveTo evaluate the effect of suture ligation around the tumor combined with intra-tumoral drug injection to treat hepatic cavernous hemangioma. MethodsTwenty-two cases of hepatic cavernous (hemangioma) underwent laparatomy and suture ligation around the tumor plus intra-tumoral drug injection under direct vision. ResultsThere was no postoperative mortality or morbidity. 22 patients were followed up for 3 months to 4 years. After this treatment for hepatic cavernous hemangioma, the success rate was 100%, and the significantly success rate was 76.19%. ConclusionsThe combined therapy for hepatic cavernous (hemangioma) is safe, reliable, simple and easy to perform.
RESUMEN
Objective To investigate the relevant factors for development of early postoperative complications in patients with portal hypertension due to advanced schistosomiasis, and to offer a theoretical basis for preventing the occurrence of postoperative complications. Methods The cases of advanced schistosomiasis with portal (hypertension) operated upon over the past 40 years were retrospectively reviewed. Results In 8 240 cases, the complication rate was 19.66% at one month after operation, and the mortality rate was 15.31%. The main causes of death were MDOS, massive hemorrhage into abdominal cavity, hepatorenal syndrome and (recurrence) of bleeding of upper alimentary tract. Conclusions The relevant factors for development of early complications after operation in patients with portal hypertension is related to the cause of portal hypertension, whether or not there is a history of ascites, the timing of operation and the stage of liver function(Child′s classification).