The insulin-like growth factor binding protein-3 （IGFBP-3） was known as a key factor that regulates the effect of insulin- like growth factors （IGF-1 and IGF-2） on pig growth and development. We first identified 3...The insulin-like growth factor binding protein-3 （IGFBP-3） was known as a key factor that regulates the effect of insulin- like growth factors （IGF-1 and IGF-2） on pig growth and development. We first identified 38 single nucleotide polymorphisms （SNPs） from a fragment of the IGFBP-3 gene spanning 1 823 bp using the denaturing high-performance liquid chromatography （DHPLC） method and confirmed them by direct sequencing. Among these SNPs, 36 located in introns and the remaining 2 in the 3 prime untranslated region （3UTR）. In addition, 16 PCR-RFLP polymorphisms were identified within these SNPs. Three SNPs were then selected to genotype 272 F2 individuals with PCR-RFLP method and the association of polymorphism with growth and carcass traits were analyzed. The results showed that no significant associations were observed between polymorphisms of A265G and A952G and traits. However, the A2670G significantly related with live body length, loin muscle area, and skin and fat percentage （P〈0.05）; highly significantly associated with weight of carcass lean and lean percentage （P〈 0.01）.展开更多
Objective: The aim of the study was to investigate the relationship between susceptibility of paclitaxel-based regimen and gene polymorphisms of cytochrome oxidase CYP3A4 for advanced gastric cancer. Methods: Peripher...Objective: The aim of the study was to investigate the relationship between susceptibility of paclitaxel-based regimen and gene polymorphisms of cytochrome oxidase CYP3A4 for advanced gastric cancer. Methods: Peripheral venous blood sample of 53 advanced gastric cancer patients were enrolled to test the mutation of CYP3A4 gene by denaturing high performance liquid chromatography(DHPLC) and DNA sequencing. The relation between the efficacy of paclitaxel-based regimen and CYP3A4 gene polymorphisms was further analyzed. Results: DHPLC indicated that among the 53 patients, 21 cases showed biomodal type(mutation) and 32 cases were of unimodal type(wild-type). Sequencing results showed that the deletion mutation was found at the 27 th basic group of C in exon 10 of CYP3A4 gene. The response rate(RR) and disease control rate(DCR) of wild-type group were 40.6% and 84.4%, while in mutation group they were 33.3% and 85.7%, respectively, with no significances between the two groups(P > 0.05). Of all 53 cases, the median progression-free survival(PFS) was 6.5 months(95% CI: 3.576–9.424 months), and the median overall survival(OS) was 11.0 months(95% CI: 6.955–15.045 months). The median PFS and OS in wild-type group had no differences compared with those in mutation group(7.0 months vs. 7.0 months, P > 0.05; 10.0 months vs. 14.0 months, P > 0.05). Between wild-type and mutation groups, the median PFS of patients applied with oxaliplatin containing regimen and the median OS in patients applied with/without oxaliplatin had no significant differences(P > 0.05), while the median PFS in patients received non-oxaliplatin regime had statistical differences(P = 0.024). The median PFS and OS in patients receiving 3-drug or 2-drug regimes had no correlation with CYP3A4 gene polymorphisms. The adverse effects in the two groups were mild, mainly in grades 1–2. The common adverse effects were anorexia, nausea/vomiting and leucopenia. Conclusion: Deletion mutation was located in the 27 th basic group of C in exon 10 of CYP3A4 gene. P展开更多
变性高效液相色谱(D enaturing H ighP-erform ance Liquid Chrom atography,D H PLC)是一种可以对核酸片段进行灵敏、快速的分析,并检测出单碱基错配及插入缺失的新技术,在生命科学许多领域有广泛的应用.对D H PLC在致病微生物基因抗...变性高效液相色谱(D enaturing H ighP-erform ance Liquid Chrom atography,D H PLC)是一种可以对核酸片段进行灵敏、快速的分析,并检测出单碱基错配及插入缺失的新技术,在生命科学许多领域有广泛的应用.对D H PLC在致病微生物基因抗药性突变检测、基因型分析等领域的应用研究进展进行了综述.展开更多
变性高效液相色谱法是在高效液相色谱法的基础上发展起来的一种新方法。由于该技术具有快速、经济、准确和自动化程度高等特点,广泛用于单核苷多态的筛检中。本文简述了变性高效液相色谱法的基本原理,并将它与各种 SNP 筛检技术进行系...变性高效液相色谱法是在高效液相色谱法的基础上发展起来的一种新方法。由于该技术具有快速、经济、准确和自动化程度高等特点,广泛用于单核苷多态的筛检中。本文简述了变性高效液相色谱法的基本原理,并将它与各种 SNP 筛检技术进行系统比较,综述了 DHPLC 在这一领域的最新研究进展。展开更多
基金the projects under the National High Technology Research and Development Program of China(2006CB 102107)the National Natu-ral Science Foundation of China(30571327)the Key Program of Science and Technology of Guangdong Province,China(2006B20201051).
文摘The insulin-like growth factor binding protein-3 （IGFBP-3） was known as a key factor that regulates the effect of insulin- like growth factors （IGF-1 and IGF-2） on pig growth and development. We first identified 38 single nucleotide polymorphisms （SNPs） from a fragment of the IGFBP-3 gene spanning 1 823 bp using the denaturing high-performance liquid chromatography （DHPLC） method and confirmed them by direct sequencing. Among these SNPs, 36 located in introns and the remaining 2 in the 3 prime untranslated region （3UTR）. In addition, 16 PCR-RFLP polymorphisms were identified within these SNPs. Three SNPs were then selected to genotype 272 F2 individuals with PCR-RFLP method and the association of polymorphism with growth and carcass traits were analyzed. The results showed that no significant associations were observed between polymorphisms of A265G and A952G and traits. However, the A2670G significantly related with live body length, loin muscle area, and skin and fat percentage （P〈0.05）; highly significantly associated with weight of carcass lean and lean percentage （P〈 0.01）.
基金Supported by grants from the National Natural Science Foundation of Fujian Province(No.2009J01120)Innovation in Medical Foundation of Fujian Province(No.2009-CXB-27)
文摘Objective: The aim of the study was to investigate the relationship between susceptibility of paclitaxel-based regimen and gene polymorphisms of cytochrome oxidase CYP3A4 for advanced gastric cancer. Methods: Peripheral venous blood sample of 53 advanced gastric cancer patients were enrolled to test the mutation of CYP3A4 gene by denaturing high performance liquid chromatography(DHPLC) and DNA sequencing. The relation between the efficacy of paclitaxel-based regimen and CYP3A4 gene polymorphisms was further analyzed. Results: DHPLC indicated that among the 53 patients, 21 cases showed biomodal type(mutation) and 32 cases were of unimodal type(wild-type). Sequencing results showed that the deletion mutation was found at the 27 th basic group of C in exon 10 of CYP3A4 gene. The response rate(RR) and disease control rate(DCR) of wild-type group were 40.6% and 84.4%, while in mutation group they were 33.3% and 85.7%, respectively, with no significances between the two groups(P > 0.05). Of all 53 cases, the median progression-free survival(PFS) was 6.5 months(95% CI: 3.576–9.424 months), and the median overall survival(OS) was 11.0 months(95% CI: 6.955–15.045 months). The median PFS and OS in wild-type group had no differences compared with those in mutation group(7.0 months vs. 7.0 months, P > 0.05; 10.0 months vs. 14.0 months, P > 0.05). Between wild-type and mutation groups, the median PFS of patients applied with oxaliplatin containing regimen and the median OS in patients applied with/without oxaliplatin had no significant differences(P > 0.05), while the median PFS in patients received non-oxaliplatin regime had statistical differences(P = 0.024). The median PFS and OS in patients receiving 3-drug or 2-drug regimes had no correlation with CYP3A4 gene polymorphisms. The adverse effects in the two groups were mild, mainly in grades 1–2. The common adverse effects were anorexia, nausea/vomiting and leucopenia. Conclusion: Deletion mutation was located in the 27 th basic group of C in exon 10 of CYP3A4 gene. P
文摘变性高效液相色谱(D enaturing H ighP-erform ance Liquid Chrom atography,D H PLC)是一种可以对核酸片段进行灵敏、快速的分析,并检测出单碱基错配及插入缺失的新技术,在生命科学许多领域有广泛的应用.对D H PLC在致病微生物基因抗药性突变检测、基因型分析等领域的应用研究进展进行了综述.
