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( Ran Huo ),( Hui Zhu ),( Li Lu ),( Lan Lan Ying ),( Min Xu ),( Zhi Yang Xu ),( Jian Min Li ),( Zuo Min Zhou ),( Jia Hao Sha ) 생화학분자생물학회 2005 BMB Reports Vol.38 No.1
A gene coding a novel isoform of carbamyl phosphate synthetase I (CPSI) was cloned from a human testicular library. As shown by cDNA microarray hybridization, this gene was expressed at a higher level in human adult testes than in fetal testes. The full length of its cDNA was 3831 bp, with a 3149 bp open reading frame, encoding a 1050-amino-acid protein. The cDNA sequence was deposited in the GenBank (AY317138). Sequence analysis showed that it was homologous to the human CPS1 gene. The putative protein contained functional domains composing the intact large subunit of carbamoyl phosphate synthetase, thus indicated it has the capability of arginine biosynthesis. A multiple tissue expression profile showed high expression of this gene in human testis, suggesting the novel alternative splicing form of CPS1 may be correlated with human spermatogenesis.
Huo, Ran,Zhu, Hui,Lu, Li,Ying, Lanlan,Xu, Min,Xu, Zhiyang,Li, Jianmin,Zhou, Zuomin,Sha, Jiahao Korean Society for Biochemistry and Molecular Biol 2005 Journal of biochemistry and molecular biology Vol.38 No.1
A gene coding a novel isoform of carbamyl phosphate synthetase I (CPS1) was cloned from a human testicular library. As shown by cDNA microarray hybridization, this gene was expressed at a higher level in human adult testes than in fetal testes. The full length of its cDNA was 3831 bp, with a 3149 bp open reading frame, encoding a 1050-amino-acid protein. The cDNA sequence was deposited in the GenBank (AY317138). Sequence analysis showed that it was homologous to the human CPS1 gene. The putative protein contained functional domains composing the intact large subunit of carbamoyl phosphate synthetase, thus indicated it has the capability of arginine biosynthesis. A multiple tissue expression profile showed high expression of this gene in human testis, suggesting the novel alternative splicing form of CPS1 may be correlated with human spermatogenesis.
Huo, Li,Li, Jun-Ran,Liao, Fu-Hui 한국유변학회 2011 Korea-Australia rheology journal Vol.23 No.1
Three kinds of electrorheological (ER) materials with carboxyl, amido and hydroxyl group, respectively, were synthesized by a simple adsorption method. The powder of silicon dioxide as a substrate of the materials, as well as terephthalic acid [$p-C_6H_4(COOH)_2$, abbr.: phen-COOH], p-phenylenediamine [$p-C_6H_4(NH_2)_2$, abbr.: $phen-NH_2$] and hydroquinone [$p-C_6H_4(OH_2)_2$, abbr.: phen-OH] were chosen as starting materials. The ER properties of suspensions of the materials in silicon oil were studied. The suspension of the material adsorbing phen-COOH reveals the highest ER activity, the relative shear stress of the suspension (25 wt%), ${\tau}_r(={\tau}_E/{\tau}_0,\;{\tau}_E\;and\;{\tau}_0$ are the shear stresses at electric field strengths of E=4.2 and 0 kV/mm, respectively), reaches 220 under a DC electric field at a shear rate of $14.5s^{-1}$. The shear stress of the suspension of the material adsorbing $phen-NH_2$ is the largest at an high electric field strength. The ER activity of the material adsorbing phen-OH is the lowest among the three materials. The molecule structure is an importance factor in influencing ER performance of the materials for similar compounds with different polar function groups. The relationship between the ER activity and dielectric property of the materials was discussed.
Li Huo,Jun-Ran Li,Fu-Hui Liao 한국유변학회 2011 Korea-Australia rheology journal Vol.23 No.1
Three kinds of electrorheological (ER) materials with carboxyl, amido and hydroxyl group, respectively,were synthesized by a simple adsorption method. The powder of silicon dioxide as a substrate of the materials,as well as terephthalic acid [p-C_6H_4(COOH)_2, abbr.: phen-COOH], p-phenylenediamine [p-C_6H_4(NH_2)_2, abbr.: phen-NH_2] and hydroquinone [p-C_6H_4(OH)_2, abbr.: phen-OH] were chosen as starting materials. The ER properties of suspensions of the materials in silicon oil were studied. The suspension of the material adsorbing phen-COOH reveals the highest ER activity, the relative shear stress of the suspension (25 wt%), τ_r(=τ_E/τ_0, τ_E and τ_0 are the shear stresses at electric field strengths of E=4.2 and 0 kV/mm, respectively), reaches 220 under a DC electric field at a shear rate of 14.5 s^(−1). The shear stress of the suspension of the material adsorbing phen-NH2 is the largest at an high electric field strength. The ER activity of the material adsorbing phen-OH is the lowest among the three materials. The molecule structure is an importance factor in influencing ER performance of the materials for similar compounds with different polar function groups. The relationship between the ER activity and dielectric property of the materials was discussed.
Chuanmin Zhang,Ran Huo,Xiaodong Wang,Junying Zhang,Jue Cheng,Ling Shi 한국공업화학회 2020 Journal of Industrial and Engineering Chemistry Vol.89 No.-
To improve the corrosion resistance and glossiness offlaky aluminum pigments in waterborne coatings, aflaky aluminum pigment was encapsulated with poly(methylhydrosiloxane) (PMHS) as an anti-corrosionfilm by in-situ polymerization, and its chemical composition was characterized by Fourier-transforminfrared and X-ray photoelectron spectroscopy, and its morphology and microstructure was identified byscanning and transmission electron microcopy. Furthermore, its anticorrosive performance wasconfirmed by Zeta potential measurement and electrochemical impedance spectroscopy. Theencapsulatedflaky aluminum pigment not only exhibits excellent corrosion resistance but also showsan improved thermal stability due to the fabrication of a PMHS-based organosiliconfilm on the surface ofaluminumflakes. Most of all, the original glossiness and brightness could be maintained for thewaterborne coatingfilm after the encapsulatedflaky aluminum pigment was incorporated, indicating agreat application potential in waterborne coatings, water-based paints, printing inks, spray-freematerials and any more. This work provides a new strategy for design and fabrication of high corrosionresistantand high glossy aluminum pigments.
Wen-Ning Xu,Huo-Liang Zheng,Run-Ze Yang,Tao Liu,Wei Yu,Xin-Feng Zheng,Bo Li,Sheng-Dan Jiang,Lei-Sheng Jiang 생화학분자생물학회 2019 Experimental and molecular medicine Vol.51 No.-
The main pathological mechanism of intervertebral disc degeneration (IVDD) is the programmed apoptosis of nucleus pulposus (NP) cells. Oxidative stress is a significant cause of IVDD. Whether mitophagy is induced by strong oxidative stress in IVDD remains to be determined. This study aimed to investigate the relationship between oxidative stress and mitophagy and to better understand the mechanism of IVDD in vivo and in vitro. To this end, we obtained primary NP cells from the human NP and subsequently exposed them to TBHP. We observed that oxidative stress induced mitophagy to cause apoptosis in NP cells, and we suppressed mitophagy and found that NP cells were protected against apoptosis. Interestingly, TBHP resulted in mitophagy through the inhibition of the HIF-1α/NDUFA4L2 pathway. Therefore, the upregulation of mitochondrial NDUFA4L2 restricted mitophagy induced by oxidative stress. Furthermore, the expression levels of HIF-1α and NDUFA4L2 were decreased in human IVDD. In conclusion, these results demonstrated that the upregulation of NDUFA4L2 ameliorated the apoptosis of NP cells by repressing excessive mitophagy, which ultimately alleviated IVDD. These findings show for the first time that NDUFA4L2 and mitophagy may be potential therapeutic targets for IVDD.
Cao Hongli,Zhang Guosheng,Ma Hui,Xue Zhongwen,Huo Ran,Wang Kun,Liu Zijin 한국미생물·생명공학회 2024 Journal of microbiology and biotechnology Vol.34 No.1
Refractory infections, such as hospital-acquired pneumonia, can be better diagnosed with the assistance of precise methicillin-resistant Staphylococcus aureus (MRSA) testing. However, traditional methods necessitate high-tech tools, rigorous temperature cycling, and the extraction of genetic material from MRSA cells. Herein, we propose a sensitive, specific, and extraction-free strategy for MRSA detection by integrating allosteric probe-based target recognition and exonuclease-III (ExoIII)-enhanced color reaction. The penicillin-binding protein 2a (PBP2a) aptamer in the allosteric probe binds with MRSA to convert protein signals to nucleic acid signals. This is followed by the DNA polymerase-assisted target recycle and the production of numerous single-strand DNA (ssDNA) chains which bind with silver ion (Ag+ ) aptamer to form a blunt terminus that can be identified by Exo-III. As a result, the Ag+ aptamer pre-coupled to magnetic nanoparticles is digested. After magnetic separation, the Ag+ in liquid supernatant catalyzes 3,3’,5,5’-tetramethylbenzidine (TMB) for a color reaction. In addition, a concentration of 54 cfu/mL is predicted to be the lowest detectable value. Based on this, our assay has a wide linear detection range, covering 5 orders of magnitude and demonstrating a high specificity, which allows it to accurately distinguish the target MRSA from other microorganisms.