本研究检测弥漫大B细胞性淋巴瘤(DLBCL)患者外周血单个核细胞中TRAF6、TAK1及TGF-β基因在化疗前后的表达变化,探讨化疗对TRAF6/TAK1信号通路活性的影响。采用Ct值比较法,通过SYBR Green II实时定量PCR检测38例DLBCL患者化疗前及化疗2...本研究检测弥漫大B细胞性淋巴瘤(DLBCL)患者外周血单个核细胞中TRAF6、TAK1及TGF-β基因在化疗前后的表达变化,探讨化疗对TRAF6/TAK1信号通路活性的影响。采用Ct值比较法,通过SYBR Green II实时定量PCR检测38例DLBCL患者化疗前及化疗2周期后外周血单个核细胞(PBMNC)中TRAF6、TAK1及TGF-β在mRNA的表达水平,并以12例健康人PBMNC作为对照。结果表明:DLBCL患者治疗前后PBMNC中TRAF6、TAK1和TGF-βmRNA表达水平均高于正常人。治疗前患者TRAF6及TAK1基因表达水平与正常人相比未发现统计学差异(P>0.05),治疗后这两基因的表达明显增高,差异具有统计学意义(P<0.05);在此同时治疗后与治疗前相比,这两基因的表达水平也具明显统计学差异(P<0.05),且这两基因的表达水平呈明显正相关,而TGF-β基因治疗后较治疗前明显下降,差异具统计学差异(P<0.05)。结论:DLBCL患者化疗后TRAF6/TAK1信号通路的活性明显增高,而TGF-β基因治疗后则较治疗前明显下降。展开更多
Background: Intramuscular fat(IMF) content is a vital parameter for assessing pork quality. Increasing evidence has shown that microRNAs(miRNAs) play an important role in regulating porcine IMF deposition. Here, a nov...Background: Intramuscular fat(IMF) content is a vital parameter for assessing pork quality. Increasing evidence has shown that microRNAs(miRNAs) play an important role in regulating porcine IMF deposition. Here, a novel miRNA implicated in porcine IMF adipogenesis was found, and its effect and regulatory mechanism were further explored with respect to intramuscular preadipocyte proliferation and differentiation.Results: By porcine adipose tissue miRNA sequencing analysis, we found that miR-146a-5p is a potential regulator of porcine IMF adipogenesis. Further studies showed that miR-146a-5p mimics inhibited porcine intramuscular preadipocyte proliferation and differentiation, while the miR-146a-5p inhibitor promoted cell proliferation and adipogenic differentiation. Mechanistically, miR-146a-5p suppressed cell proliferation by directly targeting SMAD family member 4(SMAD4) to attenuate TGF-β signaling. Moreover, miR-146a-5p inhibited the differentiation of intramuscular preadipocytes by targeting TNF receptor-associated factor 6(TRAF6) to weaken the AKT/mTORC1 signaling downstream of the TRAF6 pathway.Conclusions: MiR-146a-5p targets SMAD4 and TRAF6 to inhibit porcine intramuscular adipogenesis by attenuating TGF-β and AKT/mTORC1 signaling, respectively. These findings provide a novel miRNA biomarker for regulating intramuscular adipogenesis to promote pork quality.展开更多
Tumor necrosis factor receptor-associated factor 6(TRAF6) and transforming growth factor-β-activated kinase 1(TAK1) are two important adaptor molecules in Toll-like receptor(TLR) signaling pathway. In this study, TRA...Tumor necrosis factor receptor-associated factor 6(TRAF6) and transforming growth factor-β-activated kinase 1(TAK1) are two important adaptor molecules in Toll-like receptor(TLR) signaling pathway. In this study, TRAF6(PoTRAF6) and TAK1(PoTAK1) were cloned and characterized in Japanese flounder(Paralichthys olivaceus). The full-length cDNA sequence of Po TRAF6 is 1953 bp, with an open reading frame(ORF) of 1713 bp encoding a putative protein of 570 amino acids. PoTRAF6 contains one really interesting new gene(RING) domain, two zinc fingers, one coiled-coil region, and one meprin and TRAF homology(MATH) domain, which shows a high similarity to TRAF6 s in other species. The full-length PoTAK1 cDNA sequence is 2086 bp, with an ORF of 1728 bp that encodes a putative protein of 575 amino acids. PoTAK1 contains a conserved serine/threonine protein kinase catalytic domain and a coiled-coil region. The promoter regions of PoTRAF6 and PoTAK1 were also analyzed to predict several potential transcription factor-binding sites. In addition, the expression patterns of these two genes were examined in developmental stages, different tissues, and challenged samples. PoTRAF6 and PoTAK1 were expressed during the whole developmental stages, and the highest expressions were in intestine and heart, respectively. In challenged embryonic cells with LPS, CpG ODN, and poly I:C, the expressions of PoTRAF6 and PoTAK1 were both up-regulated significantly. These results suggest that PoTRAF6 and Po TAK1 play crucial roles in immune responses and may be involved in the developmental process of Japanese flounder.展开更多
文摘本研究检测弥漫大B细胞性淋巴瘤(DLBCL)患者外周血单个核细胞中TRAF6、TAK1及TGF-β基因在化疗前后的表达变化,探讨化疗对TRAF6/TAK1信号通路活性的影响。采用Ct值比较法,通过SYBR Green II实时定量PCR检测38例DLBCL患者化疗前及化疗2周期后外周血单个核细胞(PBMNC)中TRAF6、TAK1及TGF-β在mRNA的表达水平,并以12例健康人PBMNC作为对照。结果表明:DLBCL患者治疗前后PBMNC中TRAF6、TAK1和TGF-βmRNA表达水平均高于正常人。治疗前患者TRAF6及TAK1基因表达水平与正常人相比未发现统计学差异(P>0.05),治疗后这两基因的表达明显增高,差异具有统计学意义(P<0.05);在此同时治疗后与治疗前相比,这两基因的表达水平也具明显统计学差异(P<0.05),且这两基因的表达水平呈明显正相关,而TGF-β基因治疗后较治疗前明显下降,差异具统计学差异(P<0.05)。结论:DLBCL患者化疗后TRAF6/TAK1信号通路的活性明显增高,而TGF-β基因治疗后则较治疗前明显下降。
基金supported by grants from the National Natural Science Foundation (31872979, 31572366)the National Key Research and Development Program of China (2017YFD0502002)the National Basic Research Programs of China (2015CB943102)。
文摘Background: Intramuscular fat(IMF) content is a vital parameter for assessing pork quality. Increasing evidence has shown that microRNAs(miRNAs) play an important role in regulating porcine IMF deposition. Here, a novel miRNA implicated in porcine IMF adipogenesis was found, and its effect and regulatory mechanism were further explored with respect to intramuscular preadipocyte proliferation and differentiation.Results: By porcine adipose tissue miRNA sequencing analysis, we found that miR-146a-5p is a potential regulator of porcine IMF adipogenesis. Further studies showed that miR-146a-5p mimics inhibited porcine intramuscular preadipocyte proliferation and differentiation, while the miR-146a-5p inhibitor promoted cell proliferation and adipogenic differentiation. Mechanistically, miR-146a-5p suppressed cell proliferation by directly targeting SMAD family member 4(SMAD4) to attenuate TGF-β signaling. Moreover, miR-146a-5p inhibited the differentiation of intramuscular preadipocytes by targeting TNF receptor-associated factor 6(TRAF6) to weaken the AKT/mTORC1 signaling downstream of the TRAF6 pathway.Conclusions: MiR-146a-5p targets SMAD4 and TRAF6 to inhibit porcine intramuscular adipogenesis by attenuating TGF-β and AKT/mTORC1 signaling, respectively. These findings provide a novel miRNA biomarker for regulating intramuscular adipogenesis to promote pork quality.
基金supported by the National Natural Science Foundation of China (No. 31101891)the National High-tech Research and Development Program (No. 2012AA10A402)
文摘Tumor necrosis factor receptor-associated factor 6(TRAF6) and transforming growth factor-β-activated kinase 1(TAK1) are two important adaptor molecules in Toll-like receptor(TLR) signaling pathway. In this study, TRAF6(PoTRAF6) and TAK1(PoTAK1) were cloned and characterized in Japanese flounder(Paralichthys olivaceus). The full-length cDNA sequence of Po TRAF6 is 1953 bp, with an open reading frame(ORF) of 1713 bp encoding a putative protein of 570 amino acids. PoTRAF6 contains one really interesting new gene(RING) domain, two zinc fingers, one coiled-coil region, and one meprin and TRAF homology(MATH) domain, which shows a high similarity to TRAF6 s in other species. The full-length PoTAK1 cDNA sequence is 2086 bp, with an ORF of 1728 bp that encodes a putative protein of 575 amino acids. PoTAK1 contains a conserved serine/threonine protein kinase catalytic domain and a coiled-coil region. The promoter regions of PoTRAF6 and PoTAK1 were also analyzed to predict several potential transcription factor-binding sites. In addition, the expression patterns of these two genes were examined in developmental stages, different tissues, and challenged samples. PoTRAF6 and PoTAK1 were expressed during the whole developmental stages, and the highest expressions were in intestine and heart, respectively. In challenged embryonic cells with LPS, CpG ODN, and poly I:C, the expressions of PoTRAF6 and PoTAK1 were both up-regulated significantly. These results suggest that PoTRAF6 and Po TAK1 play crucial roles in immune responses and may be involved in the developmental process of Japanese flounder.
