Nanos1基因在日本血吸蟲生殖器官中的功能研究
[Abstract]:Objective: the Nanos gene encodes a RNA binding protein containing the zinc finger structure, which can play an important role in the coordination of Pumilio protein, which plays an important role in the transcription regulation of the survival related genes of the primitive germ cells..Nanos protein is in time, and the regulation of gene translation and m RNA localization in space is to start the post polarization hair of the Drosophila melanogaster. .Nanos gene plays an important role in the migration and differentiation of primordial germ cells, and plays an essential role in the growth and development of Caenorhabditis elegans, zebrafish, silkworm, African toad and mice, as well as the development of the Nanos gene and the reproductive organs of most species. Therefore, we speculate that the protein encoded by the Nanos gene of Schistosoma japonicum also plays a role in the development of its reproductive organs. Methods: first, using DNAMAN software and BLAST in NCBI to analyze the homology of Nanos protein to determine the typing of Nanos in Schistosoma japonicum, and then to explore the Nanos gene by the method of in situ hybridization. In the location of Schistosoma japonicum, then transfected with Si RNA of Nanos gene for 28 days after infection, the Schistosoma japonicum was cultured for 10 days in vitro, and Si RNA was transfected once every 3 days and three times were transfected. TRIzol method was used to extract the total insect RNA and total protein, and the M RNA and Western blot methods were analyzed by fluorescence quantitative PCR and Western blot methods. After Nanos gene interference, the morphological changes of the reproductive organs of Schistosoma japonicum were observed by laser confocal scanning microscope with the method of carmine dyed with carmine. We also observed the effect of the interference of Nanos gene on the number of eggs of Schistosoma japonicum by ordinary optical microscope; finally, in the Nanos base After the reduction, the changes in the interaction of Nanos gene and the gene expression level of the egg formation were detected by the fluorescence quantitative PCR method. Results: the Nanos protein homology analysis showed that the homology of the Nanos1 (SjNanos1) protein of Schistosoma japonicum and the Nanos2 protein of Schistosoma mansoni was 43%, and the homology of the Nanos1 protein of Schistosoma mansoni. According to 25%., it is reported that the Nanos2 of Schistosoma mansoni is mainly expressed in the yolk gland and may be related to the development of the reproductive system. Therefore, the SjNanos1 gene is used as the subject of this study. The results of in situ hybridization show that the SjNanos1 gene is mainly expressed in the female and male reproductive organs of the Schistosoma japonicum after the clasp, and the Japanese blood sucking before the joint is held. The SjNanos1 gene was not found in the insect; the expression of SjNanos1 in the m RNA and protein levels decreased significantly after the Si RNA interference of the SjNanos1 gene. The results of the confocal laser scanning microscope showed that after the reduction of SjNanos1 gene, the testicles contracted slightly in the Japanese blood sucking males and the ventral side of the testicles. Part of the mature slender sperm was almost not observed; at the same time, obvious fissures were found in each testis. For schistosomiasis, the mature oocyte in the ovary decreased, the immature oocyte increased, the yolk cells in the yolk gland decreased obviously and the yolk cells atrophied obviously; the SjNanos1 gene subtracted. Then, the number of eggs was counted by ordinary optical microscopy, and the number of eggs dropped by about 41%, 56% and 71%, respectively, at fourth, seventh and tenth days, and the number of eggs in the womb of the female decreased significantly, and the culture decreased by about 50% in 10 days. In addition, the SjNanos1 gene silencing also affected the interaction with the SjNanos1 gene. Changes in the genes related to the formation of eggs, such as Pumilio, CNOT6L and Fs800 genes. The expression of Pumilio gene increased by about 3 times after the SjNanos1 gene interference, and the expression level of the CNOT6L gene decreased by about 50%.. The expression of Fs800 gene in Schistosoma japonicum was reduced by about 90%. conclusion: by interfering with the Japanese blood sucking. The expression of the SjNanos1 gene, the ovary of the female schistosomiasis, the yolk gland and the testis of the male, and the egg production of the female are also significantly affected. Therefore, we can conclude that the SjNanos1 gene plays an important role in the development of the reproductive organs of Schistosoma japonicum and the formation and production of the eggs.
【學(xué)位授予單位】:安徽醫(yī)科大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2017
【分類號】:R383.24
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