OBJECTIVE:This study was conducted to evaluate the effect of Amomum villosum on longitudinal bone growth.METHODS:Adolescent female Sprague-Dawley rats were divided into 3 groups and treated for 4 days:control(distille...OBJECTIVE:This study was conducted to evaluate the effect of Amomum villosum on longitudinal bone growth.METHODS:Adolescent female Sprague-Dawley rats were divided into 3 groups and treated for 4 days:control(distilled water,p.o.),recombinant human growth hormone(rhGH;100 μg/kg,s.c.),and A.villosum(500 mg/kg,p.o.) groups.On day 3,tetracycline(20 g/kg,i.p.) was injected for growth plate identification.On days 2,3 and 4,5-bromo-2'-deoxyuridine(BrdU)(50 mg/kg,i.p.) was injected to label proliferating cells.On day 5,tibias were dissected and fixed in 4% paraformaldehyde,dehydrated,and sectioned for immunohistochemistry and histomorphometry.RESULTS:The rate of bone growth in the A.villosum and rhGH groups increased to(410 ± 44) and(389 ± 46) μm/day(P<0.01),respectively,as compared with the control(330.7 ± 34.7) μm/day.The thickness of the growth plates also increased to(591 ± 37) and(598 ± 32) μm,respectively,as compared with the control(524± 89) μm(P<0.001).The number of BrdU-positive cells in the chondrocytes of the A.villosum and rhGH groups was also significantly higher(126±24) and(143±18) cells/mm 2,respectively) than in the control(109 ± 25) mm 2(P<0.05).Insulin-like growth factor-1 and bone morphogenetic protein-2 in the A.villosum and rhGH groups were highly expressed in the growth plate as compared with the control samples,indicating increased bone formation.CONCLUSIONS:A.villosum could be used to treat growth retardation during adolescence.展开更多
【目的】克隆阳春砂萜类生物合成途径的上游关键酶——1-去氧-D-木酮糖-5-磷酸还原异构酶(1-deoxy-D-xylulose-5-phosphate reducto iso merase,DXR)(EC:1.1.1.267)的编码基因;分析基因的功能及其在阳春砂不同组织中的表达。【方法】通...【目的】克隆阳春砂萜类生物合成途径的上游关键酶——1-去氧-D-木酮糖-5-磷酸还原异构酶(1-deoxy-D-xylulose-5-phosphate reducto iso merase,DXR)(EC:1.1.1.267)的编码基因;分析基因的功能及其在阳春砂不同组织中的表达。【方法】通过基于逆转录—聚合酶链反应(RT-PCR)的方法从阳春砂叶片中获得编码DXR的cDNA全长序列,克隆基因编码区;用生物信息学的方法对其编码蛋白进行相似性检索和功能分析;用半定量RT-PCR法比较基因在阳春砂不同组织中的表达差异。【结果】获得了全长1749bp的编码阳春砂DXR的cDNA序列,命名为AvDXR1(GenBank登记号:FJ459894)。AvDXR1编码的蛋白与其他植物来源的DXR有很高相似性,含有烟酰胺腺嘌呤二核苷酸磷酸(NADPH)结合基序和DXR活性位点基序,N-端有叶绿体靶向转运肽。保守功能结构域的分析结果表明AvDXR1属于1-去氧-D-木酮糖-5-磷酸还原酶家族。AvDXR1在包括茎、根、果皮和种子团的广泛组织中表达,且在这些组织中的表达量均高于在叶片中的表达。【结论】AvDXR1基因是阳春砂DXR的编码基因,该基因在阳春砂的叶、茎、根、果皮和种子团中广泛表达。展开更多
基金Supported by the Fund of Amomum villosum in bone growth
文摘OBJECTIVE:This study was conducted to evaluate the effect of Amomum villosum on longitudinal bone growth.METHODS:Adolescent female Sprague-Dawley rats were divided into 3 groups and treated for 4 days:control(distilled water,p.o.),recombinant human growth hormone(rhGH;100 μg/kg,s.c.),and A.villosum(500 mg/kg,p.o.) groups.On day 3,tetracycline(20 g/kg,i.p.) was injected for growth plate identification.On days 2,3 and 4,5-bromo-2'-deoxyuridine(BrdU)(50 mg/kg,i.p.) was injected to label proliferating cells.On day 5,tibias were dissected and fixed in 4% paraformaldehyde,dehydrated,and sectioned for immunohistochemistry and histomorphometry.RESULTS:The rate of bone growth in the A.villosum and rhGH groups increased to(410 ± 44) and(389 ± 46) μm/day(P<0.01),respectively,as compared with the control(330.7 ± 34.7) μm/day.The thickness of the growth plates also increased to(591 ± 37) and(598 ± 32) μm,respectively,as compared with the control(524± 89) μm(P<0.001).The number of BrdU-positive cells in the chondrocytes of the A.villosum and rhGH groups was also significantly higher(126±24) and(143±18) cells/mm 2,respectively) than in the control(109 ± 25) mm 2(P<0.05).Insulin-like growth factor-1 and bone morphogenetic protein-2 in the A.villosum and rhGH groups were highly expressed in the growth plate as compared with the control samples,indicating increased bone formation.CONCLUSIONS:A.villosum could be used to treat growth retardation during adolescence.
文摘【目的】克隆阳春砂萜类生物合成途径的上游关键酶——1-去氧-D-木酮糖-5-磷酸还原异构酶(1-deoxy-D-xylulose-5-phosphate reducto iso merase,DXR)(EC:1.1.1.267)的编码基因;分析基因的功能及其在阳春砂不同组织中的表达。【方法】通过基于逆转录—聚合酶链反应(RT-PCR)的方法从阳春砂叶片中获得编码DXR的cDNA全长序列,克隆基因编码区;用生物信息学的方法对其编码蛋白进行相似性检索和功能分析;用半定量RT-PCR法比较基因在阳春砂不同组织中的表达差异。【结果】获得了全长1749bp的编码阳春砂DXR的cDNA序列,命名为AvDXR1(GenBank登记号:FJ459894)。AvDXR1编码的蛋白与其他植物来源的DXR有很高相似性,含有烟酰胺腺嘌呤二核苷酸磷酸(NADPH)结合基序和DXR活性位点基序,N-端有叶绿体靶向转运肽。保守功能结构域的分析结果表明AvDXR1属于1-去氧-D-木酮糖-5-磷酸还原酶家族。AvDXR1在包括茎、根、果皮和种子团的广泛组织中表达,且在这些组织中的表达量均高于在叶片中的表达。【结论】AvDXR1基因是阳春砂DXR的编码基因,该基因在阳春砂的叶、茎、根、果皮和种子团中广泛表达。
