Hemiplegia caused by stroke indicates dysfunction of the network between the brain and limbs, namely collateral shock in the brain. Contralateral needling is the insertion of needles into acupoints on the relative hea...Hemiplegia caused by stroke indicates dysfunction of the network between the brain and limbs, namely collateral shock in the brain. Contralateral needling is the insertion of needles into acupoints on the relative healthy side of the body to treat diseases such as apoplexy. However, there is little well-designed and controlled clinical evidence for this practice. This study investigated whether contralateral needling could treat hemiplegia after acute ischemic stroke in 106 randomly selected patients with acute ischemic stroke. These patients were randomly assigned to three groups: 45 in the contralateral needling group, receiving acupuncture on the unaffected limbs; 45 in the conven- tional acupuncture group, receiving acupuncture on the hemiplegic limbs; and 16 in the control group, receiving routine treatments without acupuncture. Acupuncture at acupoints Chize (LU5) in the upper limb and Jianliao (TEl4) in the lower limb was performed for 45 minutes daily for 30 consecutive days. The therapeutic effective rate, Neurological Deficit Score, Modified Barthel Index and FugI-Meyer Assessment were evaluated. The therapeutic effective rate of contralateral nee- dling was higher than that of conventional acupuncture (46.67% vs. 31.11%, P 〈 0.05). The neuro- logical deficit score of contralateral needling was significantly decreased compared with conven- tional acupuncture (P 〈 0.01). The Modified Barthel Index and FugI-Meyer Assessment score of contralateral needling increased more significantly than those of conventional acupuncture (both P 〈 0.01). The present findings suggest that contralateral needling unblocks collaterals and might be more effective than conventional acupuncture in the treatment of hemiplegia following acute ischemic stroke.展开更多
In eukaryotes,N-ethylmaleimide-sensitive factor(NSF)is a conserved AAA+ATPase and a key component of the membrane trafficking machinery that promotes the fusion of secretory vesicles with target membranes.Here,we demo...In eukaryotes,N-ethylmaleimide-sensitive factor(NSF)is a conserved AAA+ATPase and a key component of the membrane trafficking machinery that promotes the fusion of secretory vesicles with target membranes.Here,we demonstrate that the Arabidopsis thaliana genome contains a single copy of NSF,At NSF,which plays an essential role in the regulation of leaf serration.The At NSF knock-down mutant,atnsf-1,exhibited more serrations in the leaf margin.Moreover,polar localization of the PINFORMED1(PIN1)auxin efflux transporter was diffuse around the margins of atnsf-1 leaves and root growth was inhibited in the atnsf-1 mutant.More PIN1-GFP accumulated in the intracellular compartments of atnsf-1 plants,suggesting that At NSF is required for intracellular trafficking of PIN between the endosome and plasma membrane.Furthermore,the serration phenotype was suppressed in the atnsf-1 pin1-8 double mutant,suggesting that At NSF is required for PIN1-mediated polar auxin transport to regulate leaf serration.The CUPSHAPED COTYLEDON2(CUC2)transcription factor gene is up-regulated in atnsf-1 plants and the cuc2-3 single mutant exhibits smooth leaf margins,demonstrating that At NSF also functions in the CUC2 pathway.Our results reveal that At NSF regulates the PIN1-generated auxin maxima with a CUC2-mediated feedback loop to control leaf serration.展开更多
CELL DIVISION CONTROL PROTEIN48(CDC48)is essential for membrane fusion,protein degradation,and other cellular processes.Here,we revealed the crucial role of CDC48B in regulating periclinal cell division in roots by an...CELL DIVISION CONTROL PROTEIN48(CDC48)is essential for membrane fusion,protein degradation,and other cellular processes.Here,we revealed the crucial role of CDC48B in regulating periclinal cell division in roots by analyzing the recessive gen1 mutant.We identified the GEN1 gene through map-based cloning and verified that GEN1 encodes CDC48B.gen1 showed severely inhibited root growth,increased periclinal cell division in the endodermis,defective middle cortex(MC)formation,and altered ground tissue patterning in roots.Consistent with these phenotypes,CYCLIND 6;1(CYCD6;1),a periclinal cell division marker,was upregulated in gen1 compared to Col-0.The ratio of SHR_(pro):SHR-GFP fluorescence in pre-dividing nuclei versus the adjacent stele decreased by 33%in gen1,indicating that the trafficking of SHORT-ROOT(SHR)decreased in gen1 when endodermal cells started to divide.These findings suggest that the loss of function of CDC48B inhibits the intercellular trafficking of SHR from the stele to the endodermis,thereby decreasing SHR accumulation in the endodermis.These findings shed light on the crucial role of CDC48B in regulating periclinal cell division in roots.展开更多
Among the five members of AUX1/LAX genes coding for auxin carriers in rice,only OsAUX1 and OsAUX3 have been reported.To understand the function of the other AUX1/LAX genes,two independent alleles of osaux4 mutants,osa...Among the five members of AUX1/LAX genes coding for auxin carriers in rice,only OsAUX1 and OsAUX3 have been reported.To understand the function of the other AUX1/LAX genes,two independent alleles of osaux4 mutants,osaux4-1 and osaux4-2,were constructed using the CRISPR/Cas9 editing system.Homozygous osaux4-1 or osaux4-2 exhibited shorter primary root(PR)and longer root hair(RH)compared to the wild-type Dongjin(WT/DJ),and lost response to indoleacetic acid(IAA)treatment.OsAUX4 is intensively expressed in roots and localized on the plasma membrane,suggesting that OsAUX4 might function in the regulation of root development.The decreased meristem cell division activity and the downregulated expression of cell cycle genes in root apices of osaux4 mutants supported the hypothesis that OsAUX4 positively regulates PR elongation.OsAUX4 is expressed in RH,and osaux4 mutants showing longer RH compared to WT/DJ implies that OsAUX4 negatively regulates RH development.Furthermore,osaux4 mutants are insensitive to Pi starvation(-Pi)and OsAUX4 effects on the-Pi response is associated with altered expression levels of Pi starvation-regulated genes,and auxin distribution/contents.This study revealed that OsAUX4 not only regulates PR and RH development but also plays a regulatory role in crosstalk between auxin and-Pi signaling.展开更多
Gaseous nitrogen (N2) makes up 78% of the earth's at- mosphere; its incorporation into a wide range of biological macromolecules molecules, such as nucleic acids and amino acids, makes it an essential part of all l...Gaseous nitrogen (N2) makes up 78% of the earth's at- mosphere; its incorporation into a wide range of biological macromolecules molecules, such as nucleic acids and amino acids, makes it an essential part of all life on earth. However, as nitrogen gas is inert, it remains unavailable to most organisms, including plants. Thus, in order to be useful for fertilizer production, gaseous nitrogen needs first to be converted into bioavailable organic nitrogen in processes which are inefficient and rate-limiting for agricultural pro- duction. It was not until about 100 years ago that BASF were able to produce synthetic ammonia, the main ingredient for fertilizer production, on an industrial scale from pressurized air using the Haber--Bosch process. This chemical process was not only an impressive technical feat that helped Haber (1918) and Bosch (1931) earn Nobel Prizes but also enabled farmers to achieve the high yields that drive modern agriculture.展开更多
DNA methylation plays an important role in gene expression in eukaryote. But DNA methylation of transgene usually leads to target gene silencing in plant genetic engineering. In this research, reporter gene β-glu-cur...DNA methylation plays an important role in gene expression in eukaryote. But DNA methylation of transgene usually leads to target gene silencing in plant genetic engineering. In this research, reporter gene β-glu-curonidase (GUS) gene (uidA) was introduced into tobaccos via Agrobacterium-mediated transformation method, and the foreign uidA gene became inactive in some transgenic tobaccos. No mRNA of uidA was detected in these plants by Northern blotting analysis, and DNA methylation of promoter region was found. The results indicated that gene silencing might be caused by DNA methylation of promoter.展开更多
Gravity-induced root curvature involves the asymmetric distribution of the phytohormone auxin.This response depends on the concerted activities of the auxin transporters such as PIN-FORMED(PIN)proteins for auxin efflu...Gravity-induced root curvature involves the asymmetric distribution of the phytohormone auxin.This response depends on the concerted activities of the auxin transporters such as PIN-FORMED(PIN)proteins for auxin efflux and AUXIN RESISTANT 1(AUX1)for auxin influx.However,how the auxin gradient is established remains elusive.Here we identified a new mutant with a short root,strong auxin distribution in the lateral root cap and an impaired gravitropic response.The causal gene encoded an Arabidopsis homolog of the human unconventional prefoldin RPB5 interactor(URI).At URI interacted with prefoldin 2(PFD2)and PFD6,twoβ-type PFD members that modulate actin and tubulin patterning in roots.The auxin reporter DR5_(rev):GFP showed that asymmetric auxin redistribution after gravistimulation is disordered in aturi-1 root tips.Treatment with the endomembrane protein trafficking inhibitor brefeldin A indicated that recycling of the auxin transporter PIN2 is disrupted in aturi-1 roots as well as in pfd mutants.We propose that At URI cooperates with PFDs to recycle PIN2and modulate auxin distribution.展开更多
基金partially funded by a grant from Ningxia Science and Technology Support Project,No.2012ZYS207
文摘Hemiplegia caused by stroke indicates dysfunction of the network between the brain and limbs, namely collateral shock in the brain. Contralateral needling is the insertion of needles into acupoints on the relative healthy side of the body to treat diseases such as apoplexy. However, there is little well-designed and controlled clinical evidence for this practice. This study investigated whether contralateral needling could treat hemiplegia after acute ischemic stroke in 106 randomly selected patients with acute ischemic stroke. These patients were randomly assigned to three groups: 45 in the contralateral needling group, receiving acupuncture on the unaffected limbs; 45 in the conven- tional acupuncture group, receiving acupuncture on the hemiplegic limbs; and 16 in the control group, receiving routine treatments without acupuncture. Acupuncture at acupoints Chize (LU5) in the upper limb and Jianliao (TEl4) in the lower limb was performed for 45 minutes daily for 30 consecutive days. The therapeutic effective rate, Neurological Deficit Score, Modified Barthel Index and FugI-Meyer Assessment were evaluated. The therapeutic effective rate of contralateral nee- dling was higher than that of conventional acupuncture (46.67% vs. 31.11%, P 〈 0.05). The neuro- logical deficit score of contralateral needling was significantly decreased compared with conven- tional acupuncture (P 〈 0.01). The Modified Barthel Index and FugI-Meyer Assessment score of contralateral needling increased more significantly than those of conventional acupuncture (both P 〈 0.01). The present findings suggest that contralateral needling unblocks collaterals and might be more effective than conventional acupuncture in the treatment of hemiplegia following acute ischemic stroke.
基金financially supported by Shandong Taishanghuangjing Biotechnology Co.Ltd.received Faculty-Development Competitive Research Grants Program of Nazarbayev University(ID:16797152,ie,15798117(110119FD4531)to Yingqiu Xie,and ID:16796808,ie,15874919(110119FD4542)to Haiyan Fan and Yingqiu Xie)2019 Asian Universities Alliance(AUA)fellowship of United Arab Emirates University(UAEU)to Yingqiu Xie and Amr Amin.
基金supported by the National Natural Science Foundation of China(31570291,31570246,31872669)Funds of Shandong“Double Tops”Program(SYL2017YSTD03)+6 种基金Shandong“Foreign experts double hundred”Program(WST2017008)Taishan Scholar ProjectDFG(SFB 746)Excel ence Initiative of the German Federal and State Governments(EXC 294)Bundesministerium für Forschung und Technik(BMBF,MICROSYSTEMS)the Deutsches Zentrum für Luft und Raumfahrt(DLR 50WB1022)Natural Science Foundation of Heilongjiang Province(C2016002)。
文摘In eukaryotes,N-ethylmaleimide-sensitive factor(NSF)is a conserved AAA+ATPase and a key component of the membrane trafficking machinery that promotes the fusion of secretory vesicles with target membranes.Here,we demonstrate that the Arabidopsis thaliana genome contains a single copy of NSF,At NSF,which plays an essential role in the regulation of leaf serration.The At NSF knock-down mutant,atnsf-1,exhibited more serrations in the leaf margin.Moreover,polar localization of the PINFORMED1(PIN1)auxin efflux transporter was diffuse around the margins of atnsf-1 leaves and root growth was inhibited in the atnsf-1 mutant.More PIN1-GFP accumulated in the intracellular compartments of atnsf-1 plants,suggesting that At NSF is required for intracellular trafficking of PIN between the endosome and plasma membrane.Furthermore,the serration phenotype was suppressed in the atnsf-1 pin1-8 double mutant,suggesting that At NSF is required for PIN1-mediated polar auxin transport to regulate leaf serration.The CUPSHAPED COTYLEDON2(CUC2)transcription factor gene is up-regulated in atnsf-1 plants and the cuc2-3 single mutant exhibits smooth leaf margins,demonstrating that At NSF also functions in the CUC2 pathway.Our results reveal that At NSF regulates the PIN1-generated auxin maxima with a CUC2-mediated feedback loop to control leaf serration.
基金supported by the National Natural Science Foundation of China (31570291, 31570246)Funds of Shandong “Double Tops” Program (YL2017YSTD03)+3 种基金Shandong “Foreign Experts Double Hundred” Program (WST2017008)Shandong Key Basic Research (ZR2018ZC08N1)Natural Science Foundation of Heilongjiang Province (C2016002)the Fundamental Research Funds for the Central Universities (2572019CT03).
文摘CELL DIVISION CONTROL PROTEIN48(CDC48)is essential for membrane fusion,protein degradation,and other cellular processes.Here,we revealed the crucial role of CDC48B in regulating periclinal cell division in roots by analyzing the recessive gen1 mutant.We identified the GEN1 gene through map-based cloning and verified that GEN1 encodes CDC48B.gen1 showed severely inhibited root growth,increased periclinal cell division in the endodermis,defective middle cortex(MC)formation,and altered ground tissue patterning in roots.Consistent with these phenotypes,CYCLIND 6;1(CYCD6;1),a periclinal cell division marker,was upregulated in gen1 compared to Col-0.The ratio of SHR_(pro):SHR-GFP fluorescence in pre-dividing nuclei versus the adjacent stele decreased by 33%in gen1,indicating that the trafficking of SHORT-ROOT(SHR)decreased in gen1 when endodermal cells started to divide.These findings suggest that the loss of function of CDC48B inhibits the intercellular trafficking of SHR from the stele to the endodermis,thereby decreasing SHR accumulation in the endodermis.These findings shed light on the crucial role of CDC48B in regulating periclinal cell division in roots.
基金This project was funded by grants from the National Key Research and Development Program of China(2016YFD0100400)the Zhejiang Provincial Natural Science Foundation of China(LZ19C020001)the National Natural Science Foundation of China(32060451).
文摘Among the five members of AUX1/LAX genes coding for auxin carriers in rice,only OsAUX1 and OsAUX3 have been reported.To understand the function of the other AUX1/LAX genes,two independent alleles of osaux4 mutants,osaux4-1 and osaux4-2,were constructed using the CRISPR/Cas9 editing system.Homozygous osaux4-1 or osaux4-2 exhibited shorter primary root(PR)and longer root hair(RH)compared to the wild-type Dongjin(WT/DJ),and lost response to indoleacetic acid(IAA)treatment.OsAUX4 is intensively expressed in roots and localized on the plasma membrane,suggesting that OsAUX4 might function in the regulation of root development.The decreased meristem cell division activity and the downregulated expression of cell cycle genes in root apices of osaux4 mutants supported the hypothesis that OsAUX4 positively regulates PR elongation.OsAUX4 is expressed in RH,and osaux4 mutants showing longer RH compared to WT/DJ implies that OsAUX4 negatively regulates RH development.Furthermore,osaux4 mutants are insensitive to Pi starvation(-Pi)and OsAUX4 effects on the-Pi response is associated with altered expression levels of Pi starvation-regulated genes,and auxin distribution/contents.This study revealed that OsAUX4 not only regulates PR and RH development but also plays a regulatory role in crosstalk between auxin and-Pi signaling.
文摘Gaseous nitrogen (N2) makes up 78% of the earth's at- mosphere; its incorporation into a wide range of biological macromolecules molecules, such as nucleic acids and amino acids, makes it an essential part of all life on earth. However, as nitrogen gas is inert, it remains unavailable to most organisms, including plants. Thus, in order to be useful for fertilizer production, gaseous nitrogen needs first to be converted into bioavailable organic nitrogen in processes which are inefficient and rate-limiting for agricultural pro- duction. It was not until about 100 years ago that BASF were able to produce synthetic ammonia, the main ingredient for fertilizer production, on an industrial scale from pressurized air using the Haber--Bosch process. This chemical process was not only an impressive technical feat that helped Haber (1918) and Bosch (1931) earn Nobel Prizes but also enabled farmers to achieve the high yields that drive modern agriculture.
基金This work was supported by the State "863" High-Tech Project (Grant Nos. Z-17-01-01 and BH-02-02-02) the National Natural Science Foundation of China (Grant No. 39989001) and Chinese Department of Science and Technology (Grant No. ZJY-B-01).
文摘DNA methylation plays an important role in gene expression in eukaryote. But DNA methylation of transgene usually leads to target gene silencing in plant genetic engineering. In this research, reporter gene β-glu-curonidase (GUS) gene (uidA) was introduced into tobaccos via Agrobacterium-mediated transformation method, and the foreign uidA gene became inactive in some transgenic tobaccos. No mRNA of uidA was detected in these plants by Northern blotting analysis, and DNA methylation of promoter region was found. The results indicated that gene silencing might be caused by DNA methylation of promoter.
基金supported by an initiation fund from the Shandong Agricultural University,the National Natural Science Foundation of China(31570291)the Shandong“Foreign experts double hundred”Program(WST2017008)the Natural Science Foundation of Shandong Province(ZR2021MC175)。
文摘Gravity-induced root curvature involves the asymmetric distribution of the phytohormone auxin.This response depends on the concerted activities of the auxin transporters such as PIN-FORMED(PIN)proteins for auxin efflux and AUXIN RESISTANT 1(AUX1)for auxin influx.However,how the auxin gradient is established remains elusive.Here we identified a new mutant with a short root,strong auxin distribution in the lateral root cap and an impaired gravitropic response.The causal gene encoded an Arabidopsis homolog of the human unconventional prefoldin RPB5 interactor(URI).At URI interacted with prefoldin 2(PFD2)and PFD6,twoβ-type PFD members that modulate actin and tubulin patterning in roots.The auxin reporter DR5_(rev):GFP showed that asymmetric auxin redistribution after gravistimulation is disordered in aturi-1 root tips.Treatment with the endomembrane protein trafficking inhibitor brefeldin A indicated that recycling of the auxin transporter PIN2 is disrupted in aturi-1 roots as well as in pfd mutants.We propose that At URI cooperates with PFDs to recycle PIN2and modulate auxin distribution.