目的:利用文献计量学分析余甘子相关研究的研究脉络、热点和进展趋势。方法:计算机检索中国知网、Web of Science2003年1月至2022年11月收录的余甘子相关研究文献。采用CiteSpace软件绘制文献的作者合作视图和关键词的共现、聚类、突现...目的:利用文献计量学分析余甘子相关研究的研究脉络、热点和进展趋势。方法:计算机检索中国知网、Web of Science2003年1月至2022年11月收录的余甘子相关研究文献。采用CiteSpace软件绘制文献的作者合作视图和关键词的共现、聚类、突现及时间线知识图谱,Python挖掘摘要主题内容,并从活性成分、药理作用、制剂与应用等方面进行深度分析。结果:共纳入中文文献804篇,英文文献577篇。余甘子的研究整体呈现上升的趋势。高频关键词有没食子酸、藏药、数据挖掘等。关键词聚类、突现分析发现,藏药、保健功能、提取、黄酮、氧化应激等为当前余甘子相关研究领域的主要热点,多酚、生长、绿色合成、质量标准等可能成为未来的研究方向。文本挖掘出中文文献、英文文献各8个主题,重点内容聚焦在活性成分和药理作用等方面。深度分析表明,余甘子的研究多呈现活性成分多、靶点广、机制新、应用多等特点。结论:近年来国内外余甘子研究热度持续上升,余甘子研究领域不断更新,涉及范围不断扩大,尤其在分子药理、抗病毒和肿瘤等方面。展开更多
Tibetans are welt adapted to high-altitude hypoxia. Previous genome-wide scans have reported many candidate genes for this adaptation, but only a few have been studied. Here we report on a hypoxia gene （GCH1, GTP-cyc...Tibetans are welt adapted to high-altitude hypoxia. Previous genome-wide scans have reported many candidate genes for this adaptation, but only a few have been studied. Here we report on a hypoxia gene （GCH1, GTP-cyclohydrolase I）, involved in maintaining nitric oxide synthetase （NOS） function and normal blood pressure, that harbors many potentially adaptive variants in Tibetans. We resequenced an 80.8 kb fragment covering the entire gene region of GCH1 in 50 unrelated Tibetans Combined with previously published data, we demonstrated many GCHI variants showing deep divergence between highlander Tibetans and lowlander Han Chinese. Neutrality tests confirmed a signal of positive Darwinian selection on GCH1 in Tibetans. Moreover, association analysis indicated that the Tibetan version of GCH1 was significantly associated with multiple physiological traits in Tibetans, including blood nitric oxide concentration, blood oxygen saturation and hemoglobin concentration. Taken together, we propose that GCH1 plays a role in the genetic adaptation of Tibetans to high altitude hypoxia.展开更多
The genetic adaptation of Tibetans to high altitude hypoxia likely involves a group of genes in the hypoxic pathway, as suggested by earlier studies. To test the adaptive role of the previously reported candidate gene...The genetic adaptation of Tibetans to high altitude hypoxia likely involves a group of genes in the hypoxic pathway, as suggested by earlier studies. To test the adaptive role of the previously reported candidate gene EP300 （histone acetyltransferase p300）, we conducted resequencing of a 108.9 kb gene region of EP300 in 80 unrelated Tibetans. The allele-frequency and haplotype-based neutrality tests detected signals of positive Darwinian selection on EP300 in Tibetans, with a group of variants showing allelic divergence between Tibetans and lowland reference populations, including Han Chinese, Europeans, and Africans. Functional prediction suggested the involvement of multiple EP300 variants in gene expression regulation. More importantly, genetic association tests in 226 Tibetans indicated significant correlation of the adaptive EP300 variants with blood nitric oxide （NO） concentration. Collectively, we propose that EP300 harbors adaptive variants in Tibetans, which might contribute to high-altitude adaptation through regulating NO production.展开更多
文摘目的:利用文献计量学分析余甘子相关研究的研究脉络、热点和进展趋势。方法:计算机检索中国知网、Web of Science2003年1月至2022年11月收录的余甘子相关研究文献。采用CiteSpace软件绘制文献的作者合作视图和关键词的共现、聚类、突现及时间线知识图谱,Python挖掘摘要主题内容,并从活性成分、药理作用、制剂与应用等方面进行深度分析。结果:共纳入中文文献804篇,英文文献577篇。余甘子的研究整体呈现上升的趋势。高频关键词有没食子酸、藏药、数据挖掘等。关键词聚类、突现分析发现,藏药、保健功能、提取、黄酮、氧化应激等为当前余甘子相关研究领域的主要热点,多酚、生长、绿色合成、质量标准等可能成为未来的研究方向。文本挖掘出中文文献、英文文献各8个主题,重点内容聚焦在活性成分和药理作用等方面。深度分析表明,余甘子的研究多呈现活性成分多、靶点广、机制新、应用多等特点。结论:近年来国内外余甘子研究热度持续上升,余甘子研究领域不断更新,涉及范围不断扩大,尤其在分子药理、抗病毒和肿瘤等方面。
基金supported by grants from the Strategic Priority Research Program of the Chinese Academy of Sciences(XDB13010000)the National Natural Science Foundation of China(91631306 to BS,31671329 to XQ,31460287 to Ou.,31501013 to HZ and 31360032 to CC)+2 种基金the National 973 program(2012CB518202 to TW)the State Key Laboratory of Genetic Resources and Evolution(GREKF15-05,GREKF16-04)the Zhufeng Scholar Program of Tibetan University
文摘Tibetans are welt adapted to high-altitude hypoxia. Previous genome-wide scans have reported many candidate genes for this adaptation, but only a few have been studied. Here we report on a hypoxia gene （GCH1, GTP-cyclohydrolase I）, involved in maintaining nitric oxide synthetase （NOS） function and normal blood pressure, that harbors many potentially adaptive variants in Tibetans. We resequenced an 80.8 kb fragment covering the entire gene region of GCH1 in 50 unrelated Tibetans Combined with previously published data, we demonstrated many GCHI variants showing deep divergence between highlander Tibetans and lowlander Han Chinese. Neutrality tests confirmed a signal of positive Darwinian selection on GCH1 in Tibetans. Moreover, association analysis indicated that the Tibetan version of GCH1 was significantly associated with multiple physiological traits in Tibetans, including blood nitric oxide concentration, blood oxygen saturation and hemoglobin concentration. Taken together, we propose that GCH1 plays a role in the genetic adaptation of Tibetans to high altitude hypoxia.
基金supported by grants from the Strategic Priority Research Program of the Chinese Academy of Sciences(XDB13010000)the National Natural Science Foundation of China(91631306 to BS,31671329 to XQ,31460287 to Ou,31501013 to HZ,and 31360032 to CC)+2 种基金the National 973 program(2012CB518202 to TW)the State Key Laboratory of Genetic Resources and Evolution(GREKF15-05,GREKF16-04)the Zhufeng Scholar Program of Tibetan University
文摘The genetic adaptation of Tibetans to high altitude hypoxia likely involves a group of genes in the hypoxic pathway, as suggested by earlier studies. To test the adaptive role of the previously reported candidate gene EP300 （histone acetyltransferase p300）, we conducted resequencing of a 108.9 kb gene region of EP300 in 80 unrelated Tibetans. The allele-frequency and haplotype-based neutrality tests detected signals of positive Darwinian selection on EP300 in Tibetans, with a group of variants showing allelic divergence between Tibetans and lowland reference populations, including Han Chinese, Europeans, and Africans. Functional prediction suggested the involvement of multiple EP300 variants in gene expression regulation. More importantly, genetic association tests in 226 Tibetans indicated significant correlation of the adaptive EP300 variants with blood nitric oxide （NO） concentration. Collectively, we propose that EP300 harbors adaptive variants in Tibetans, which might contribute to high-altitude adaptation through regulating NO production.
