目的研究人类剪切蛋白(drosophila behavior human splicing,DBHS)家族基因,包括p5nrb、PSF、PSPC1基因,对食管鳞状细胞癌(以下简称食管磷癌)细胞系TE-8细胞系迁移、侵袭能力的影响。方法构建p54nrb、PSF、PSPC1基因过表达载体,通过脂...目的研究人类剪切蛋白(drosophila behavior human splicing,DBHS)家族基因,包括p5nrb、PSF、PSPC1基因,对食管鳞状细胞癌(以下简称食管磷癌)细胞系TE-8细胞系迁移、侵袭能力的影响。方法构建p54nrb、PSF、PSPC1基因过表达载体,通过脂质体法转染TE-8细胞,转染48 h后qRT-PCR和Western blotting检测各组细胞p54nrb、PSF、PSPC1在mRNA和蛋白质水平的表达。细胞划痕实验及覆盖有Matrigel的Transwell小室检测食管鳞癌细胞的迁移、侵袭能力。结果过表达p54nrb、PSF、PSPC1后,qRT-PCR和Western blotting检测证实食管鳞癌TE-8细胞中上述基因表达在mRNA水平和蛋白质水平均明显上调,细胞划痕实验及Transwell小室实验证实食管鳞癌TE-8细胞过表达p54nrb、PSF、PSPC1后,其迁移、侵袭能力增强。结论过表达DBHS家族基因可促进食管鳞癌细胞的迁移侵袭。展开更多
目的研究多巴胺β羟化酶(DBH)基因启动子区的19 bp Insert/Delet位点和α-2B肾上腺素能受体(α-2BAR)基因12Glu9位点与原发性高血压的相关性。方法选取原发性高血压患者196例,健康体检者121例,检测DBH基因启动子区的19 bp Insert/Delet...目的研究多巴胺β羟化酶(DBH)基因启动子区的19 bp Insert/Delet位点和α-2B肾上腺素能受体(α-2BAR)基因12Glu9位点与原发性高血压的相关性。方法选取原发性高血压患者196例,健康体检者121例,检测DBH基因启动子区的19 bp Insert/Delet位点和α-2BAR基因12Glu9位点多态性。结果 19 bp Insert/Delet位点和12Glu9位点的基因型和等位基因频率在病例组与对照组差异没有统计学意义(P>0.05);19 bpInsert/Delet位点和12Glu9位点的基因型对收缩压、舒张压、Na+浓度、体质量指数、K+浓度和C1-浓度变化的影响差异无统计学意义(P>0.05)。结论 DBH基因和α-2BAR基因在该人群中可能与原发性高血压和有关离子浓度变化无关。展开更多
An atom-efficient and environment-friendly approach for the synthesis of aryl-14H-dibenzo[a,j]xanthenes (3a–o) via the one-pot reaction of β-naphthol and aryl aldehydes (1) catalyzed by DBH has been developed. The p...An atom-efficient and environment-friendly approach for the synthesis of aryl-14H-dibenzo[a,j]xanthenes (3a–o) via the one-pot reaction of β-naphthol and aryl aldehydes (1) catalyzed by DBH has been developed. The present approach offers several advantages such as reduced reaction times, moderate temperature, higher yields, solvent free, eco-friendly reaction condition, easy purification and economic availability of the catalyst.展开更多
Objective To determine the location of a putative tumor suppressor gene (TSG), and evaluate the frequency loss of heterozygosity (LOH) of the long arm of chromosome 9 (9q) in bladder cancer Methods We analyzed 25 ...Objective To determine the location of a putative tumor suppressor gene (TSG), and evaluate the frequency loss of heterozygosity (LOH) of the long arm of chromosome 9 (9q) in bladder cancer Methods We analyzed 25 patients with bladder cancer for LOH of 9q using 25 high density microsatellite markers Results Twenty three samples (92%) showed LOH at least at one locus on 9q We identified that the commonly deleted region were at 9q12 q21, 9q22, and 9q34 The rate of LOH was 44 0%, 22 7%, 22 7%, 16 0%, 12 0% on DBH, D9S15, D9S1815, D9S1831, D9S176 locus, respectively, and was not significantly related with grades and stages of tumor Conclusion These data suggest that alteration of a TSG at DBH of 9q may play an important role in the development of bladder cancer展开更多
A tree's basal area(BA)and wood volume scale exponentially with tree diameter in species-specifc patterns.Recent observed increases in tree growth suggest these allometric relationships are shifting in response to...A tree's basal area(BA)and wood volume scale exponentially with tree diameter in species-specifc patterns.Recent observed increases in tree growth suggest these allometric relationships are shifting in response to climate change,rising CO_(2) levels,and/or changes in forest management.We analyzed 9,214 cores from nine conifer and 11 broadleaf species grown in managed mixed-species stands in the upper Midwest to quantify how well diameter(diameter at breast height(DBH))serves to predict BA growth and above-ground wood and carbon(C).These samples include many large trees.We ft mixed models to predict BA growth and above-ground biomass/C from diameter,tree height,and the BA of nearby trees while controlling for site effects.Models account for 55%–83%of the variance in log(recent growth),improving predictions over earlier models.Growth-diameter scaling exponents covary with certain leaf and stem(but not wood)functional traits,reflecting growth strategies.LogBA increment scales linearly with log(diameter)as trees grow bigger in 16/20 species and growth actually accelerates in Quercus rubra L.Three other species plateau in growth.Growth only decelerates in red pine,Pinus resinosa Ait.Growth in whole-tree,above-ground biomass,and C accelerate even more strongly with diameter(mean exponent:2.08 vs.1.30 for BA growth).Sustained BA growth and accelerating wood/C growth contradict the common assumption that tree growth declines in bigger trees.Yield tables and silvicultural guidelines should be updated to reflect these current relationships.Such revisions will favor delaying harvests in many managed stands to increase wood production and enhance ecosystem values including C fxation and storage.Further research may resolve the relative roles of thinning,climatic conditions,nitrogen inputs,and rising CO2 levels on changing patterns of tree growth.展开更多
Understanding competition between trees is essential for sustainable forest management as interactions between trees in uneven-aged mixed forests play a key role in growth dynamics. This study investigated nine compet...Understanding competition between trees is essential for sustainable forest management as interactions between trees in uneven-aged mixed forests play a key role in growth dynamics. This study investigated nine competition indices(CIs) for their suitability to model the effects of neighboring trees on silver fir(Abies alba) growth in Dinaric silver fir-European beech(Fagus sylvatica) forests. Although numerous competition indices have been developed, there is still limited consensus on their applicability in different forest types, especially in mature, structurally complex forest stands. The indices were evaluated using the adjusted coefficient of determination in a linear model wherein the volume growth of the last five years for 60 dominant silver fir trees was modeled as a function of tree volume and competition index. The results demonstrated that distance-dependent indices(e.g., the Hegyi height-distance competition and Rouvinen-Kuuluvainen diameter-distance competition indices), which consider the distance to competitors and their size, perform better than distance-independent indices. Using the optimization procedure in calculating the competition indices, only neighboring trees at a distance of up to 26-fold the diameter at breast height(DBH) of the selected tree(optimal search radius) and with a DBH of at least 20% of that of the target tree(optimal DBH) were considered competitors. Therefore, competition significantly influences the growth of dominant silver firs even in older age classes. The model based solely on tree volume explained 32.5% of the variability in volume growth, while the model that accounted for competition explained 64%. Optimizing the optimal search radius had a greater impact on model performance than optimizing the DBH threshold. This emphasizes the importance of balancing stand density and competition in silvicultural practice.展开更多
文摘目的研究多巴胺β羟化酶(DBH)基因启动子区的19 bp Insert/Delet位点和α-2B肾上腺素能受体(α-2BAR)基因12Glu9位点与原发性高血压的相关性。方法选取原发性高血压患者196例,健康体检者121例,检测DBH基因启动子区的19 bp Insert/Delet位点和α-2BAR基因12Glu9位点多态性。结果 19 bp Insert/Delet位点和12Glu9位点的基因型和等位基因频率在病例组与对照组差异没有统计学意义(P>0.05);19 bpInsert/Delet位点和12Glu9位点的基因型对收缩压、舒张压、Na+浓度、体质量指数、K+浓度和C1-浓度变化的影响差异无统计学意义(P>0.05)。结论 DBH基因和α-2BAR基因在该人群中可能与原发性高血压和有关离子浓度变化无关。
基金the Sari University of Payamenoor and the Islamic Azad University Babol-branch, Iran, for financial support during the realization of this research
文摘An atom-efficient and environment-friendly approach for the synthesis of aryl-14H-dibenzo[a,j]xanthenes (3a–o) via the one-pot reaction of β-naphthol and aryl aldehydes (1) catalyzed by DBH has been developed. The present approach offers several advantages such as reduced reaction times, moderate temperature, higher yields, solvent free, eco-friendly reaction condition, easy purification and economic availability of the catalyst.
文摘Objective To determine the location of a putative tumor suppressor gene (TSG), and evaluate the frequency loss of heterozygosity (LOH) of the long arm of chromosome 9 (9q) in bladder cancer Methods We analyzed 25 patients with bladder cancer for LOH of 9q using 25 high density microsatellite markers Results Twenty three samples (92%) showed LOH at least at one locus on 9q We identified that the commonly deleted region were at 9q12 q21, 9q22, and 9q34 The rate of LOH was 44 0%, 22 7%, 22 7%, 16 0%, 12 0% on DBH, D9S15, D9S1815, D9S1831, D9S176 locus, respectively, and was not significantly related with grades and stages of tumor Conclusion These data suggest that alteration of a TSG at DBH of 9q may play an important role in the development of bladder cancer
文摘A tree's basal area(BA)and wood volume scale exponentially with tree diameter in species-specifc patterns.Recent observed increases in tree growth suggest these allometric relationships are shifting in response to climate change,rising CO_(2) levels,and/or changes in forest management.We analyzed 9,214 cores from nine conifer and 11 broadleaf species grown in managed mixed-species stands in the upper Midwest to quantify how well diameter(diameter at breast height(DBH))serves to predict BA growth and above-ground wood and carbon(C).These samples include many large trees.We ft mixed models to predict BA growth and above-ground biomass/C from diameter,tree height,and the BA of nearby trees while controlling for site effects.Models account for 55%–83%of the variance in log(recent growth),improving predictions over earlier models.Growth-diameter scaling exponents covary with certain leaf and stem(but not wood)functional traits,reflecting growth strategies.LogBA increment scales linearly with log(diameter)as trees grow bigger in 16/20 species and growth actually accelerates in Quercus rubra L.Three other species plateau in growth.Growth only decelerates in red pine,Pinus resinosa Ait.Growth in whole-tree,above-ground biomass,and C accelerate even more strongly with diameter(mean exponent:2.08 vs.1.30 for BA growth).Sustained BA growth and accelerating wood/C growth contradict the common assumption that tree growth declines in bigger trees.Yield tables and silvicultural guidelines should be updated to reflect these current relationships.Such revisions will favor delaying harvests in many managed stands to increase wood production and enhance ecosystem values including C fxation and storage.Further research may resolve the relative roles of thinning,climatic conditions,nitrogen inputs,and rising CO2 levels on changing patterns of tree growth.
基金funded by the Slovenian Research and Innovation Agency(https://www.aris-rs.si/sl/)ProgramResearch Core Fund-ing No.P4-0107(TL)and No.P4-0059(MK)+1 种基金Young Researcher Program Grant(MK)funded by the Slovenian Forestry Institute(P4-0107).
文摘Understanding competition between trees is essential for sustainable forest management as interactions between trees in uneven-aged mixed forests play a key role in growth dynamics. This study investigated nine competition indices(CIs) for their suitability to model the effects of neighboring trees on silver fir(Abies alba) growth in Dinaric silver fir-European beech(Fagus sylvatica) forests. Although numerous competition indices have been developed, there is still limited consensus on their applicability in different forest types, especially in mature, structurally complex forest stands. The indices were evaluated using the adjusted coefficient of determination in a linear model wherein the volume growth of the last five years for 60 dominant silver fir trees was modeled as a function of tree volume and competition index. The results demonstrated that distance-dependent indices(e.g., the Hegyi height-distance competition and Rouvinen-Kuuluvainen diameter-distance competition indices), which consider the distance to competitors and their size, perform better than distance-independent indices. Using the optimization procedure in calculating the competition indices, only neighboring trees at a distance of up to 26-fold the diameter at breast height(DBH) of the selected tree(optimal search radius) and with a DBH of at least 20% of that of the target tree(optimal DBH) were considered competitors. Therefore, competition significantly influences the growth of dominant silver firs even in older age classes. The model based solely on tree volume explained 32.5% of the variability in volume growth, while the model that accounted for competition explained 64%. Optimizing the optimal search radius had a greater impact on model performance than optimizing the DBH threshold. This emphasizes the importance of balancing stand density and competition in silvicultural practice.
