Publications by authors named "Peiyue Zhao"

4 Publications

  • Page 1 of 1

Cotton Fiber Development Requires the Pentatricopeptide Repeat Protein GhIm for Splicing of Mitochondrial nad7 mRNA.

Genetics 2021 Mar;217(1):1-17

State Key Laboratory of Crop Genetics & Germplasm Enhancement, Hybrid Cotton R & D Engineering Research Center, Ministry of Education, Nanjing Agricultural University, Nanjing 210095, China.

Pentatricopeptide repeat (PPR) proteins encoded by nuclear genomes can bind to organellar RNA and are involved in the regulation of RNA metabolism. However, the functions of many PPR proteins remain unknown in plants, especially in polyploidy crops. Here, through a map-based cloning strategy and Clustered regularly interspaced short palindromic repeats/cas9 (CRISPR/cas9) gene editing technology, we cloned and verified an allotetraploid cotton immature fiber (im) mutant gene (GhImA) encoding a PPR protein in chromosome A03, that is associated with the non-fluffy fiber phenotype. GhImA protein targeted mitochondrion and could bind to mitochondrial nad7 mRNA, which encodes the NAD7 subunit of Complex I. GhImA and its homolog GhImD had the same function and were dosage-dependent. GhImA in the im mutant was a null allele with a 22 bp deletion in the coding region. Null GhImA resulted in the insufficient GhIm dosage, affected mitochondrial nad7 pre-mRNA splicing, produced less mature nad7 transcripts, and eventually reduced Complex I activities, up-regulated alternative oxidase metabolism, caused reactive oxygen species (ROS) burst and activation of stress or hormone response processes. This study indicates that the GhIm protein participates in mitochondrial nad7 splicing, affects respiratory metabolism, and further regulates cotton fiber development via ATP supply and ROS balance.
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March 2021

Nanoparticles Enhanced Self-driven Microfludic Biosensor.

Micromachines (Basel) 2020 Mar 27;11(4). Epub 2020 Mar 27.

College of Land Science and Technology, China Agricultural University, Beijing 100083, China.

C-reactive protein (CRP) plays an important role in inflammation detection and disease monitoring. The optical biosensor is a highly sensitive and easy detection tool. The microfluidic self-driving optical sensors were fabricated with transparent glass material and used for the enhanced surface plasmon resonance (SPR) optical detection of the model protein CRP using Au nanoparticles (AuNPs) and a sandwich immune reaction. The 3D design of the chip was devised to improve the optical coupling efficiency and enable integration with a microfluidic control and rapid detection. The array of pre-fixed antibody modified by Au nanoparticles was used to achieve rapid antigen capture and improve the optical sensitivity. The Au nanoparticle amplification approach was introduced for the SPR detection of a target protein. CRP was used as a model target protein as part of a sandwich assay. The use of Au NP measurements to detect the target signal is a threefold improvement compared to single SPR detection methods.
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March 2020

Antibacterial Properties of Tebipenem Pivoxil Tablet, a New Oral Carbapenem Preparation against a Variety of Pathogenic Bacteria in Vitro and in Vivo.

Molecules 2016 Jan 6;21(1):62. Epub 2016 Jan 6.

Department of GLP, Yunnan Institute of Materia Medica, Kunming 650111, China.

Aims: To systemically investigate the in vitro and in vivo antibacterial properties of tebipenem pivoxil tablet. In addition, acute toxicity of this preparation was also studied.

Methods: In vitro, minimum inhibitory concentration (MIC) or minimal inhibitory concentration (MBC) were determined by using the serial 2-fold broth or agar dilution methods. Further, cumulative MIC inhibition curves were then made to assess the antibacterial effects of the drug at various concentrations. In vivo, minimum lethal dose (MLD) in combination with maximum tolerance dose (MTD) was used to measure the acute toxicity of the tebipenem pivoxil tablet in mice. After that, sepsis mouse models challenged with Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa, and Klebsiella pneumoniae, respectively, were established to evaluate the anti-infective effect of this preparation.

Results: The MIC90 values of tebipenem pivoxil against Gram-positive bacteria such as methicillin-sensitive Staphylococcus aureus (MSSA), methicillin-resistant Staphylococcus aureus (MRSA), methicillin-sensitive Staphylococcus epidermidis (MSSE), methicillin-resistant Staphylococcus epidermidis (MRSE), Pyogenic streptococcus, and Enterococcus faecalis were ≤ 0.125, 16, 0.5, 8, ≤ 0.125, and 32 μg/mL, respectively. Correspondingly, the MIC90 values of tebipenem pivoxil against Escherichia coli, Klebsiella pneumoniae, Enterobacter aerogenes, Haemophilus influenzae, Pseudomonas aeruginosa, and Acinetobacter baumannii were 1, 0.5, ≤ 0.125, 0.25, 64, 64 μg/mL, respectively. The MBC values of tebipenem pivoxil against Escherichia coli, Staphylococcus aureus, Klebsiella pneumoniae were 0.016-2, 0.063-32, 0.031-32 μg/mL, respectively. The acute toxicity study showed that the MLD of the tebipenem pivoxil tablet was 4.00 g/kg and the MTD was 3.40 g/kg in mice. In all the sepsis mouse models, the simultaneous administration of the tebipenem pivoxil tablets significantly reduced mortality of the sepsis-model mice as compared with the control. Furthermore, the survival rate in the tebipenem pivoxil tablet group was remarkably higher than that in the meropenem group in all the sepsis mouse models tested. In the sepsis model challenged with Staphylococcus aureus ATCC29213, Escherichia coli ATCC25922, Pseudomonas aeruginosa ATCC27853, and Pseudomonas aeruginosa clinical strain, respectively, tebipenem pivoxil tablet (100 mg/kg) displayed a better protective effect than tebipenem pivoxil granules (100 mg/kg).

Conclusions: In summary, tebipenem pivoxil displays an excellent antibacterial activity against a variety of pathogenic bacteria in vitro. Importantly, tebipenem pivoxil tablet significantly protects the sepsis mice challenged with various pathogenic bacteria, which may provide a potential approach to treating bacterial sepsis in clinic.
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January 2016

[Study on natural borneol and synthetic borneol affecting mucosal permeability of gardenia extract].

Zhongguo Zhong Yao Za Zhi 2009 May;34(10):1207-10

School of Chinese Pharmacy, Beijing University of Traditional Chinese Medicine, Beijing 100102, China.

Objective: To observe the influence of natural borneol and synthetic borneol on mucosal permeability of Gardenia extract.

Method: Taken frog skin as a vitro model to study the vitro mucosal permeation the impacts of the natural borneols and synthetic borneols on the P(app) of the Jasminoidin were studied, and the effect of different borneols on the stability of Jasminoidin were investigated. Compared the 10 h accumulated infiltration rate of each group the effects of influence factors,such as C(Ge), C(B) and rotation speed on P(app) were investigated by using response surface method.

Result: The P(app) of Jasminoidin of natural borneol and synthetic borneol group were 1.44 fold and 1.77 fold of control group (P < 0.01). For two borneol groups, the results also showed a significant difference too (P < 0.05). Jasminoidin began to degrade about 8 h after the effect of frog skin for control group and synthetic borneol group, but was stable within 12 h for natural borneol group. The accumulated permeation rate of 10 h was same for different borneol groups. It was about 1.3 fold of control group. The C(Ge) had a salinence influence on the P(app) (P < 0.01) and C(B) had a salience influence on time-lag (P < 0.01).

Conclusion: Both the natural borneol and synthetic borneol can accelerate the permeation of Jasminoidin and the synthetic borneol has stronger effect on the P(app). Both two different borneol can reduce the degradation effect of frog skin to Jasminoidin, but the natural borneol has a better protect effect on it. By using more natural borneol, the mucosal permeability of Gardenia extract can be increased, the time-lag can be reduced, and Jasminoidin has better stability.
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May 2009