Caixia Gao - Academia.edu (original) (raw)

Papers by Caixia Gao

Lecture Notes in Electrical Engineering, 2012

Nature genetics, Jan 6, 2015

The deployment of heterosis in the form of hybrid rice varieties has boosted grain yield, but gra... more The deployment of heterosis in the form of hybrid rice varieties has boosted grain yield, but grain quality improvement still remains a challenge. Here we show that a quantitative trait locus for rice grain quality, qGW7, reflects allelic variation of GW7, a gene encoding a TONNEAU1-recruiting motif protein with similarity to C-terminal motifs of the human centrosomal protein CAP350. Upregulation of GW7 expression was correlated with the production of more slender grains, as a result of increased cell division in the longitudinal direction and decreased cell division in the transverse direction. OsSPL16 (GW8), an SBP-domain transcription factor that regulates grain width, bound directly to the GW7 promoter and repressed its expression. The presence of a semidominant GW7(TFA) allele from tropical japonica rice was associated with higher grain quality without the yield penalty imposed by the Basmati gw8 allele. Manipulation of the OsSPL16-GW7 module thus represents a new strategy to s...

We demonstrate the phase-matched four-wave mixing (FWM) generation by the fast light effect in th... more We demonstrate the phase-matched four-wave mixing (FWM) generation by the fast light effect in the bandgap of fiber Bragg grating. Energy conversion out of the bandgap has been realized in a low power level. The experimental result shows great agreement with the simulation.

Scientific reports, 2015

Human enterovirus 71 (EV71) has become the major pathogen of hand, foot, and mouth disease (HFMD)... more Human enterovirus 71 (EV71) has become the major pathogen of hand, foot, and mouth disease (HFMD) worldwide, while the anti-EV71 antibody responses other than neutralizing epitopes have not been characterized. In this study, EV71 capsid proteins VP1, VP3, VP0 and various VP1 antigens were constructed to analyze anti-EV71 response in severe HFMD cases, non-HFMD outpatient children and normal adults using a novel evolved immunoglobulin-binding molecule (NEIBM)-based ELISA. The high prevalence of antibody responses against all three capsid proteins was demonstrated, and anti-EV71 VP1 showed the main antibody response. Anti-EV71 VP1 antibody response was found to predominantly target to epitopes based on the common enterovirus cross-reactive sequence. Moreover, inhibition pattern against anti-EV71 VP1 reactions in three groups was obviously different. Taken together, these results firstly characterized the anti-EV71 antibody responses which are predominantly against VP1 epitopes based o...

Nature biotechnology, 2014

Sequence-specific nucleases have been applied to engineer targeted modifications in polyploid gen... more Sequence-specific nucleases have been applied to engineer targeted modifications in polyploid genomes, but simultaneous modification of multiple homoeoalleles has not been reported. Here we use transcription activator-like effector nuclease (TALEN) and clustered, regularly interspaced, short palindromic repeats (CRISPR)-Cas9 (refs. 4,5) technologies in hexaploid bread wheat to introduce targeted mutations in the three homoeoalleles that encode MILDEW-RESISTANCE LOCUS (MLO) proteins. Genetic redundancy has prevented evaluation of whether mutation of all three MLO alleles in bread wheat might confer resistance to powdery mildew, a trait not found in natural populations. We show that TALEN-induced mutation of all three TaMLO homoeologs in the same plant confers heritable broad-spectrum resistance to powdery mildew. We further use CRISPR-Cas9 technology to generate transgenic wheat plants that carry mutations in the TaMLO-A1 allele. We also demonstrate the feasibility of engineering tar...

Eleventh International Vacuum Microelectronics Conference. IVMC'98 (Cat. No.98TH8382), 1998

In recent years, field emission from diamond films has attracted a lot of attention because of th... more In recent years, field emission from diamond films has attracted a lot of attention because of the excellent physical and chemical properties of diamond. The emission property of diamond is influenced by defect, doping and surface state et al, surface state of diamond is very important aspect. In this work, we carried out an experiment and analytical study of field emission from diamond with various crystal grain size and orientation produced by chemical vapor deposition (CVD)

Nature Communications, 2014

Journal of Physical Chemistry B, 2006

A simple but effective aqueous-organic phase-transfer method for gold, silver, and platinum nanop... more A simple but effective aqueous-organic phase-transfer method for gold, silver, and platinum nanoparticles was developed on the basis of the decrease of the PVP's solubility in water with the temperature increase. The present method is superior in the transfer efficiency of highly stable nanoparticles to the common phase-transfer methods. The gold, silver, and platinum nanoparticles transferred to the 1-butanol phase dispersed well, especially silver and platinum particles almost kept the previous particle size. Electrochemical synthesis of gold nanoparticles in an oil-water system was achieved by controlling the reaction temperature at 80 degrees C, which provides great conveniences for collecting metal particles at the oil/water interface and especially for fabricating dense metal nanoparticle films. A technique to fabricate gold nanofilms on solid supports was also established. The shapes and sizes of gold nanoparticles as the building blocks may be controllable through changing reaction conditions.

PLoS biology, 2014

Plant agriculture is poised at a technological inflection point. Recent advances in genome engine... more Plant agriculture is poised at a technological inflection point. Recent advances in genome engineering make it possible to precisely alter DNA sequences in living cells, providing unprecedented control over a plant's genetic material. Potential future crops derived through genome engineering include those that better withstand pests, that have enhanced nutritional value, and that are able to grow on marginal lands. In many instances, crops with such traits will be created by altering only a few nucleotides among the billions that comprise plant genomes. As such, and with the appropriate regulatory structures in place, crops created through genome engineering might prove to be more acceptable to the public than plants that carry foreign DNA in their genomes. Public perception and the performance of the engineered crop varieties will determine the extent to which this powerful technology contributes towards securing the world's food supply.

Infection, genetics and evolution : journal of molecular epidemiology and evolutionary genetics in infectious diseases, 2015

The highly polymorphic chicken major histocompatibility complex (MHC) is associated with differen... more The highly polymorphic chicken major histocompatibility complex (MHC) is associated with different levels of immunologic responses to certain avian pathogens. MHC-B haplotype chickens are an important genetic resource for studying the genetic determination of pathogen resistance and susceptibility. The BWEL chicken population is the only specific pathogen-free (SPF) chickens bred and developed by the State Center of Poultry Genetic Resources of Laboratory Animals in China. In this study, we successfully established six homozygous MHC-B haplotype populations from the BWEL chickens using microsatellite marker technology, named as BW/G(1, 2, 3, 5, 6, 7) lines, and their molecular genotypes were matched to six serologically defined MHC-B haplotypes, B13, B15, B2, B5, B21 and B19, respectively. The sequences of BF genes exons 2 and 3 from four successive generations (F1-F4) of the BW/G(n) lines were completely consistent with those of serologically defined MHC-B haplotypes. Subsequently,...

Plant biotechnology journal, Jan 20, 2015

Fragrant rice is favoured worldwide because of its agreeable scent. The presence of a defective b... more Fragrant rice is favoured worldwide because of its agreeable scent. The presence of a defective badh2 allele encoding betaine aldehyde dehydrogenase (BADH2) results in the synthesis of 2-acetyl-1-pyrroline (2AP), which is a major fragrance compound. Here, transcription activator-like effector nucleases (TALENs) were engineered to target and disrupt the OsBADH2 gene. Six heterozygous mutants (30%) were recovered from 20 transgenic hygromycin-resistant lines. Sanger sequencing confirmed that these lines had various indel mutations at the TALEN target site. All six transmitted the BADH2 mutations to the T1 generation; and four T1 mutant lines tested also efficiently transmitted the mutations to the T2 generation. Mutant plants carrying only the desired DNA sequence change but not the TALEN transgene were obtained by segregation in the T1 and T2 generations. The 2AP content of rice grains of the T1 lines with homozygous mutations increased from 0 to 0.35-0.75 mg/kg, which was similar to...

Physical Review B, 2010

The thermal stability and electronic transport properties of polyamorphous Ce75Al25 metallic glas... more The thermal stability and electronic transport properties of polyamorphous Ce75Al25 metallic glass (MG) have been investigated using in situ high-pressure, high-temperature, energy-dispersive synchrotron x-ray diffraction and in situ high-pressure and low-temperature, four-probe resistance measurements. The results are compared with the properties of La75Al25 MG. The pressure dependence of the crystallization temperature and resistance of the Ce75Al25 MG exhibited turning points at the polyamorphic transition pressure, 1.5 GPa, and they clearly presented different behaviors below and above 1.5 GPa. In contrast, no turning points were observed in the La75Al25 MG (La has no 4f electron). Additionally, the pressure-tuned temperature coefficient of resistance of the Ce75Al25 MG was observed. These results revealed switchable properties in the polyamorphous Ce75Al25 MG that are linked with 4f electron delocalization.

physica status solidi (b), 2004

Nanotechnology, 2004

Nanojunctions made from one-dimensional nanostructures could provide fascinating opportunities to... more Nanojunctions made from one-dimensional nanostructures could provide fascinating opportunities to reveal new mesoscopic physics and could offer huge technological potential as well. Here we report highly controlled fabrication of boron nanowire nanojunctions with unilateral feather-like morphology by radio-frequency magnetron sputtering of a boron and boron oxide mixture in argon atmosphere. The branched boron nanowires nucleated on the same sidewall of

Nanotechnology, 2003

Large arrays of aligned CNx nanotubes were synthesized by radiofrequency magnetron sputtering of ... more Large arrays of aligned CNx nanotubes were synthesized by radiofrequency magnetron sputtering of a mixture of nanometre-sized graphite and nickel powders in a nitrogen atmosphere. The CNx nanotubes produced assembled into bundle-like arrays standing perpendicularly on the silicon substrates. The nickel nanoparticles located in the tips suggest that a 'tip-growth' mechanism governs their growth process. Transmission electron microscopy and electron

Journal of Virological Methods, 2011

Avian leukosis is a disease that is spreading widely in the world causing large economic losses t... more Avian leukosis is a disease that is spreading widely in the world causing large economic losses to the poultry industry. In this study, a duplex quantitative real-time reverse transcription polymerase chain reaction (qRT-PCR) assay was developed to detect and quantify avian leukosis virus subgroups A and B (ALVA/B). The assay was optimised to measure viral gp85 and chicken housekeeping (β-actin) genes. The result showed that the assay was specific for reference strains of ALVA/B subtype and no cross-reaction was detected with ALV subtypes E and J or with four other non-ALV viruses. The assay detected as few as 56 gp85 cDNA copies and was 100-fold more sensitive than a conventional RT-PCR. Seventy clinical blood samples were evaluated by both the qRT-PCR and the conventional RT-PCR assay, and the results show that 65 samples were positive by the qRT-PCR compared with 43 by the conventional RT-PCR. When this assay was used to quantify the viral load in ALV-inoculated embryos from three congenic chicken lines, the embryos from the B21 line showed the highest viral load, whereas the lowest load was found in the B5 line. This assay provides a powerful tool for quantitative detection of the ALVA/B and for the study of host genetic resistance to avian leukosis.

Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films, 2000

ABSTRACT

Lecture Notes in Electrical Engineering, 2012

Nature genetics, Jan 6, 2015

The deployment of heterosis in the form of hybrid rice varieties has boosted grain yield, but gra... more The deployment of heterosis in the form of hybrid rice varieties has boosted grain yield, but grain quality improvement still remains a challenge. Here we show that a quantitative trait locus for rice grain quality, qGW7, reflects allelic variation of GW7, a gene encoding a TONNEAU1-recruiting motif protein with similarity to C-terminal motifs of the human centrosomal protein CAP350. Upregulation of GW7 expression was correlated with the production of more slender grains, as a result of increased cell division in the longitudinal direction and decreased cell division in the transverse direction. OsSPL16 (GW8), an SBP-domain transcription factor that regulates grain width, bound directly to the GW7 promoter and repressed its expression. The presence of a semidominant GW7(TFA) allele from tropical japonica rice was associated with higher grain quality without the yield penalty imposed by the Basmati gw8 allele. Manipulation of the OsSPL16-GW7 module thus represents a new strategy to s...

We demonstrate the phase-matched four-wave mixing (FWM) generation by the fast light effect in th... more We demonstrate the phase-matched four-wave mixing (FWM) generation by the fast light effect in the bandgap of fiber Bragg grating. Energy conversion out of the bandgap has been realized in a low power level. The experimental result shows great agreement with the simulation.

Scientific reports, 2015

Human enterovirus 71 (EV71) has become the major pathogen of hand, foot, and mouth disease (HFMD)... more Human enterovirus 71 (EV71) has become the major pathogen of hand, foot, and mouth disease (HFMD) worldwide, while the anti-EV71 antibody responses other than neutralizing epitopes have not been characterized. In this study, EV71 capsid proteins VP1, VP3, VP0 and various VP1 antigens were constructed to analyze anti-EV71 response in severe HFMD cases, non-HFMD outpatient children and normal adults using a novel evolved immunoglobulin-binding molecule (NEIBM)-based ELISA. The high prevalence of antibody responses against all three capsid proteins was demonstrated, and anti-EV71 VP1 showed the main antibody response. Anti-EV71 VP1 antibody response was found to predominantly target to epitopes based on the common enterovirus cross-reactive sequence. Moreover, inhibition pattern against anti-EV71 VP1 reactions in three groups was obviously different. Taken together, these results firstly characterized the anti-EV71 antibody responses which are predominantly against VP1 epitopes based o...

Nature biotechnology, 2014

Sequence-specific nucleases have been applied to engineer targeted modifications in polyploid gen... more Sequence-specific nucleases have been applied to engineer targeted modifications in polyploid genomes, but simultaneous modification of multiple homoeoalleles has not been reported. Here we use transcription activator-like effector nuclease (TALEN) and clustered, regularly interspaced, short palindromic repeats (CRISPR)-Cas9 (refs. 4,5) technologies in hexaploid bread wheat to introduce targeted mutations in the three homoeoalleles that encode MILDEW-RESISTANCE LOCUS (MLO) proteins. Genetic redundancy has prevented evaluation of whether mutation of all three MLO alleles in bread wheat might confer resistance to powdery mildew, a trait not found in natural populations. We show that TALEN-induced mutation of all three TaMLO homoeologs in the same plant confers heritable broad-spectrum resistance to powdery mildew. We further use CRISPR-Cas9 technology to generate transgenic wheat plants that carry mutations in the TaMLO-A1 allele. We also demonstrate the feasibility of engineering tar...

Eleventh International Vacuum Microelectronics Conference. IVMC'98 (Cat. No.98TH8382), 1998

In recent years, field emission from diamond films has attracted a lot of attention because of th... more In recent years, field emission from diamond films has attracted a lot of attention because of the excellent physical and chemical properties of diamond. The emission property of diamond is influenced by defect, doping and surface state et al, surface state of diamond is very important aspect. In this work, we carried out an experiment and analytical study of field emission from diamond with various crystal grain size and orientation produced by chemical vapor deposition (CVD)

Nature Communications, 2014

Journal of Physical Chemistry B, 2006

A simple but effective aqueous-organic phase-transfer method for gold, silver, and platinum nanop... more A simple but effective aqueous-organic phase-transfer method for gold, silver, and platinum nanoparticles was developed on the basis of the decrease of the PVP's solubility in water with the temperature increase. The present method is superior in the transfer efficiency of highly stable nanoparticles to the common phase-transfer methods. The gold, silver, and platinum nanoparticles transferred to the 1-butanol phase dispersed well, especially silver and platinum particles almost kept the previous particle size. Electrochemical synthesis of gold nanoparticles in an oil-water system was achieved by controlling the reaction temperature at 80 degrees C, which provides great conveniences for collecting metal particles at the oil/water interface and especially for fabricating dense metal nanoparticle films. A technique to fabricate gold nanofilms on solid supports was also established. The shapes and sizes of gold nanoparticles as the building blocks may be controllable through changing reaction conditions.

PLoS biology, 2014

Plant agriculture is poised at a technological inflection point. Recent advances in genome engine... more Plant agriculture is poised at a technological inflection point. Recent advances in genome engineering make it possible to precisely alter DNA sequences in living cells, providing unprecedented control over a plant's genetic material. Potential future crops derived through genome engineering include those that better withstand pests, that have enhanced nutritional value, and that are able to grow on marginal lands. In many instances, crops with such traits will be created by altering only a few nucleotides among the billions that comprise plant genomes. As such, and with the appropriate regulatory structures in place, crops created through genome engineering might prove to be more acceptable to the public than plants that carry foreign DNA in their genomes. Public perception and the performance of the engineered crop varieties will determine the extent to which this powerful technology contributes towards securing the world's food supply.

Infection, genetics and evolution : journal of molecular epidemiology and evolutionary genetics in infectious diseases, 2015

The highly polymorphic chicken major histocompatibility complex (MHC) is associated with differen... more The highly polymorphic chicken major histocompatibility complex (MHC) is associated with different levels of immunologic responses to certain avian pathogens. MHC-B haplotype chickens are an important genetic resource for studying the genetic determination of pathogen resistance and susceptibility. The BWEL chicken population is the only specific pathogen-free (SPF) chickens bred and developed by the State Center of Poultry Genetic Resources of Laboratory Animals in China. In this study, we successfully established six homozygous MHC-B haplotype populations from the BWEL chickens using microsatellite marker technology, named as BW/G(1, 2, 3, 5, 6, 7) lines, and their molecular genotypes were matched to six serologically defined MHC-B haplotypes, B13, B15, B2, B5, B21 and B19, respectively. The sequences of BF genes exons 2 and 3 from four successive generations (F1-F4) of the BW/G(n) lines were completely consistent with those of serologically defined MHC-B haplotypes. Subsequently,...

Plant biotechnology journal, Jan 20, 2015

Fragrant rice is favoured worldwide because of its agreeable scent. The presence of a defective b... more Fragrant rice is favoured worldwide because of its agreeable scent. The presence of a defective badh2 allele encoding betaine aldehyde dehydrogenase (BADH2) results in the synthesis of 2-acetyl-1-pyrroline (2AP), which is a major fragrance compound. Here, transcription activator-like effector nucleases (TALENs) were engineered to target and disrupt the OsBADH2 gene. Six heterozygous mutants (30%) were recovered from 20 transgenic hygromycin-resistant lines. Sanger sequencing confirmed that these lines had various indel mutations at the TALEN target site. All six transmitted the BADH2 mutations to the T1 generation; and four T1 mutant lines tested also efficiently transmitted the mutations to the T2 generation. Mutant plants carrying only the desired DNA sequence change but not the TALEN transgene were obtained by segregation in the T1 and T2 generations. The 2AP content of rice grains of the T1 lines with homozygous mutations increased from 0 to 0.35-0.75 mg/kg, which was similar to...

Physical Review B, 2010

The thermal stability and electronic transport properties of polyamorphous Ce75Al25 metallic glas... more The thermal stability and electronic transport properties of polyamorphous Ce75Al25 metallic glass (MG) have been investigated using in situ high-pressure, high-temperature, energy-dispersive synchrotron x-ray diffraction and in situ high-pressure and low-temperature, four-probe resistance measurements. The results are compared with the properties of La75Al25 MG. The pressure dependence of the crystallization temperature and resistance of the Ce75Al25 MG exhibited turning points at the polyamorphic transition pressure, 1.5 GPa, and they clearly presented different behaviors below and above 1.5 GPa. In contrast, no turning points were observed in the La75Al25 MG (La has no 4f electron). Additionally, the pressure-tuned temperature coefficient of resistance of the Ce75Al25 MG was observed. These results revealed switchable properties in the polyamorphous Ce75Al25 MG that are linked with 4f electron delocalization.

physica status solidi (b), 2004

Nanotechnology, 2004

Nanojunctions made from one-dimensional nanostructures could provide fascinating opportunities to... more Nanojunctions made from one-dimensional nanostructures could provide fascinating opportunities to reveal new mesoscopic physics and could offer huge technological potential as well. Here we report highly controlled fabrication of boron nanowire nanojunctions with unilateral feather-like morphology by radio-frequency magnetron sputtering of a boron and boron oxide mixture in argon atmosphere. The branched boron nanowires nucleated on the same sidewall of

Nanotechnology, 2003

Large arrays of aligned CNx nanotubes were synthesized by radiofrequency magnetron sputtering of ... more Large arrays of aligned CNx nanotubes were synthesized by radiofrequency magnetron sputtering of a mixture of nanometre-sized graphite and nickel powders in a nitrogen atmosphere. The CNx nanotubes produced assembled into bundle-like arrays standing perpendicularly on the silicon substrates. The nickel nanoparticles located in the tips suggest that a 'tip-growth' mechanism governs their growth process. Transmission electron microscopy and electron

Journal of Virological Methods, 2011

Avian leukosis is a disease that is spreading widely in the world causing large economic losses t... more Avian leukosis is a disease that is spreading widely in the world causing large economic losses to the poultry industry. In this study, a duplex quantitative real-time reverse transcription polymerase chain reaction (qRT-PCR) assay was developed to detect and quantify avian leukosis virus subgroups A and B (ALVA/B). The assay was optimised to measure viral gp85 and chicken housekeeping (β-actin) genes. The result showed that the assay was specific for reference strains of ALVA/B subtype and no cross-reaction was detected with ALV subtypes E and J or with four other non-ALV viruses. The assay detected as few as 56 gp85 cDNA copies and was 100-fold more sensitive than a conventional RT-PCR. Seventy clinical blood samples were evaluated by both the qRT-PCR and the conventional RT-PCR assay, and the results show that 65 samples were positive by the qRT-PCR compared with 43 by the conventional RT-PCR. When this assay was used to quantify the viral load in ALV-inoculated embryos from three congenic chicken lines, the embryos from the B21 line showed the highest viral load, whereas the lowest load was found in the B5 line. This assay provides a powerful tool for quantitative detection of the ALVA/B and for the study of host genetic resistance to avian leukosis.

Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films, 2000

ABSTRACT