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An B, Zhou L, Liu S, Zheng Y, Li C, Cui F, Yue C, Liu H, Sui Y, Ji C, Yan J, Li Y. Radical Homopolymerization of Linear α-Olefins Enabled by 1,4-Cyano Group Migration. Angew Chem Int Ed Engl 2024:e202402511. [PMID: 38634323 DOI: 10.1002/anie.202402511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2024] [Revised: 04/04/2024] [Accepted: 04/17/2024] [Indexed: 04/19/2024]
Abstract
α-Olefins are valued and abundant building blocks from fossil resources. They are widely used to provide small-molecule or polymeric products. Despite numerous advantages of radical polymerization, it has been well-documented as textbook knowledge that α-olefins and their functionalized derivatives cannot be radically homopolymerized because of the degradative chain transfer side reactions. Herein, we report our studies on the homopolymerization of thiocyanate functionalized α-olefins enabled by 1,4-cyano group migration under radical conditions. By this approach, a library of ABC sequence-controlled polymers with high molecular weights can be prepared. We can also extend this strategy to the homopolymerization of α-substituted styrenic and acylate monomers which are known to be challenging to achieve. Overall, the demonstrated functional group migration radical polymerization could provide new possibilities to synthesize polymers with unprecedented main chain sequences and structures. These polymers are promising candidates for novel polymeric materials.
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Affiliation(s)
- Bang An
- School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210, China
| | - Litao Zhou
- School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210, China
| | - Shuai Liu
- School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210, China
| | - Yaxin Zheng
- School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210, China
| | - Changhu Li
- School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210, China
| | - Feichen Cui
- School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210, China
| | - Chaowei Yue
- School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210, China
| | - Hua Liu
- School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210, China
| | - Yang Sui
- School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210, China
| | - Chonglei Ji
- School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210, China
| | - Jiajun Yan
- School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210, China
| | - Yifan Li
- School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210, China
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Wang D, An B, Luo H, He C, Wang Q. Roles of CgEde1 and CgMca in Development and Virulence of Colletotrichum gloeosporioides. Int J Mol Sci 2024; 25:2943. [PMID: 38474190 DOI: 10.3390/ijms25052943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2024] [Revised: 02/28/2024] [Accepted: 02/29/2024] [Indexed: 03/14/2024] Open
Abstract
Anthracnose, induced by Colletotrichum gloeosporioides, poses a substantial economic threat to rubber tree yields and various other tropical crops. Ede1, an endocytic scaffolding protein, plays a crucial role in endocytic site initiation and maturation in yeast. Metacaspases, sharing structural similarities with caspase family proteases, are essential for maintaining cell fitness. To enhance our understanding of the growth and virulence of C. gloeosporioides, we identified a homologue of Ede1 (CgEde1) in C. gloeosporioides. The knockout of CgEde1 led to impairments in vegetative growth, conidiation, and pathogenicity. Furthermore, we characterized a weakly interacted partner of CgEde1 and CgMca (orthologue of metacaspase). Notably, both the single mutant ΔCgMca and the double mutant ΔCgEde1/ΔCgMca exhibited severe defects in conidiation and germination. Polarity establishment and pathogenicity were also disrupted in these mutants. Moreover, a significantly insoluble protein accumulation was observed in ΔCgMca and ΔCgEde1/ΔCgMca strains. These findings elucidate the mechanism by which CgEde1 and CgMca regulates the growth and pathogenicity of C. gloeosporioides. Their regulation involves influencing conidiation, polarity establishment, and maintaining cell fitness, providing valuable insights into the intricate interplay between CgEde1 and CgMca in C. gloeosporioides.
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Affiliation(s)
- Dan Wang
- Sanya Nanfan Research Institute of Hainan University, School of Tropical Agriculture and Forestry, Hainan University, Sanya 572025, China
| | - Bang An
- Sanya Nanfan Research Institute of Hainan University, School of Tropical Agriculture and Forestry, Hainan University, Sanya 572025, China
- Hainan Yazhou Bay Seed Laboratory, Sanya 572025, China
| | - Hongli Luo
- Sanya Nanfan Research Institute of Hainan University, School of Tropical Agriculture and Forestry, Hainan University, Sanya 572025, China
- Hainan Yazhou Bay Seed Laboratory, Sanya 572025, China
| | - Chaozu He
- Sanya Nanfan Research Institute of Hainan University, School of Tropical Agriculture and Forestry, Hainan University, Sanya 572025, China
- Hainan Yazhou Bay Seed Laboratory, Sanya 572025, China
| | - Qiannan Wang
- Sanya Nanfan Research Institute of Hainan University, School of Tropical Agriculture and Forestry, Hainan University, Sanya 572025, China
- Hainan Yazhou Bay Seed Laboratory, Sanya 572025, China
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Feng L, Dong M, Huang Z, Wang Q, An B, He C, Wang Q, Luo H. CgCFEM1 Is Required for the Full Virulence of Colletotrichum gloeosporioides. Int J Mol Sci 2024; 25:2937. [PMID: 38474183 DOI: 10.3390/ijms25052937] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Revised: 02/24/2024] [Accepted: 03/01/2024] [Indexed: 03/14/2024] Open
Abstract
Colletotrichum gloeosporioides is widely distributed and causes anthracnose on many crops, resulting in serious economic losses. Common fungal extracellular membrane (CFEM) domain proteins have been implicated in virulence and their interaction with the host plant, but their roles in C. gloeosporioides are still unknown. In this study, a CFEM-containing protein of C. gloeosporioides was identified and named as CgCFEM1. The expression levels of CgCFEM1 were found to be markedly higher in appressoria, and this elevated expression was particularly pronounced during the initial stages of infection in the rubber tree. Absence of CgCFEM1 resulted in impaired pathogenicity, accompanied by notable perturbations in spore morphogenesis, conidiation, appressorium development and primary invasion. During the process of appressorium development, the absence of CgCFEM1 enhanced the mitotic activity in both conidia and germ tubes, as well as compromised conidia autophagy. Rapamycin was found to basically restore the appressorium formation, and the activity of target of rapamycin (TOR) kinase was significantly induced in the CgCFEM1 knockout mutant (∆CgCFEM1). Furthermore, CgCFEM1 was proved to suppress chitin-triggered reactive oxygen species (ROS) accumulation and change the expression patterns of defense-related genes. Collectively, we identified a fungal effector CgCFEM1 that contributed to pathogenicity by regulating TOR-mediated conidia and appressorium morphogenesis of C. gloeosporioides and inhibiting the defense responses of the rubber tree.
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Affiliation(s)
- Liping Feng
- Sanya Nanfan Research Institute of Hainan University, School of Tropical Agriculture and Forestry, Hainan University, Sanya 572025, China
- Hainan Yazhou Bay Seed Laboratory, Sanya 572025, China
| | - Meixia Dong
- Sanya Nanfan Research Institute of Hainan University, School of Tropical Agriculture and Forestry, Hainan University, Sanya 572025, China
- Hainan Yazhou Bay Seed Laboratory, Sanya 572025, China
| | - Zhirui Huang
- Sanya Nanfan Research Institute of Hainan University, School of Tropical Agriculture and Forestry, Hainan University, Sanya 572025, China
- Hainan Yazhou Bay Seed Laboratory, Sanya 572025, China
| | - Qian Wang
- Sanya Nanfan Research Institute of Hainan University, School of Tropical Agriculture and Forestry, Hainan University, Sanya 572025, China
- Hainan Yazhou Bay Seed Laboratory, Sanya 572025, China
| | - Bang An
- Sanya Nanfan Research Institute of Hainan University, School of Tropical Agriculture and Forestry, Hainan University, Sanya 572025, China
- Hainan Yazhou Bay Seed Laboratory, Sanya 572025, China
| | - Chaozu He
- Sanya Nanfan Research Institute of Hainan University, School of Tropical Agriculture and Forestry, Hainan University, Sanya 572025, China
- Hainan Yazhou Bay Seed Laboratory, Sanya 572025, China
| | - Qiannan Wang
- Sanya Nanfan Research Institute of Hainan University, School of Tropical Agriculture and Forestry, Hainan University, Sanya 572025, China
- Hainan Yazhou Bay Seed Laboratory, Sanya 572025, China
| | - Hongli Luo
- Sanya Nanfan Research Institute of Hainan University, School of Tropical Agriculture and Forestry, Hainan University, Sanya 572025, China
- Hainan Yazhou Bay Seed Laboratory, Sanya 572025, China
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Huang H, Zhao L, Zhang B, Huang W, Zhang Z, An B. Integrated analysis of the metabolome and transcriptome provides insights into anthocyanin biosynthesis of cashew apple. Food Res Int 2024; 175:113711. [PMID: 38129034 DOI: 10.1016/j.foodres.2023.113711] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2023] [Revised: 09/21/2023] [Accepted: 11/20/2023] [Indexed: 12/23/2023]
Abstract
The cashew apple remains an underutilized agricultural product despite its abundance as a by-product of cashew nut production. Anthocyanins are water-soluble pigments responsible for red, purple, and blue hues in plant tissues and have various health-promoting properties. To investigate the anthocyanin biosynthesis in cashew apples, fruits with varying peel colors from three cultivars were subjected to integrative analyses with metabolomics and transcriptomics. Through a UPLC-ESI-MS/MS-based targeted metabolomics analysis, a total of 26 distinct anthocyanin compounds were identified in the fruits of the three cashew cultivars. Subsequent quantification revealed that Pelargonidin-3-O-galactoside, Petunidin-3-O-arabinoside, and Cyanidin-3-O-galactoside were the primary contributors responsible for the red pigmentation in cashew apple peels. Following transcriptomic analysis showed that the expression levels of anthocyanin biosynthetic genes were predominantly higher in the red cashew apples as compared to the other two cultivars. Moreover, correlation analysis revealed that eight potential transcription factors implicated in the regulation of anthocyanin biosynthesis. Among these, four transcription factors exhibited positive correlations with both anthocyanin contents and anthocyanin biosynthetic gene expression, while the remaining four transcription factors displayed negative correlations. These findings provide a comprehensive understanding of the molecular basis of anthocyanin biosynthesis in cashew apple peels.
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Affiliation(s)
- Haijie Huang
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences & Key Laboratory of Crop Gene Resources and Germplasm Creation in South China, Ministry of Agriculture and Rural Affairs & National Cultivar Improvement Center of Tropical Fruit Tree, Haikou, 571101, People's Republic of China.
| | - Li Zhao
- Tropical Biodiversity and Bioresource Utilization Laboratory, Qiongtai Normal University, Haikou 570100, People's Republic of China
| | - Bei Zhang
- Hainan Yazhou Bay Seed Laboratory, Sanya 572025, People's Republic of China
| | - Weijian Huang
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences & Key Laboratory of Crop Gene Resources and Germplasm Creation in South China, Ministry of Agriculture and Rural Affairs & National Cultivar Improvement Center of Tropical Fruit Tree, Haikou, 571101, People's Republic of China
| | - Zhongrun Zhang
- Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences & Key Laboratory of Crop Gene Resources and Germplasm Creation in South China, Ministry of Agriculture and Rural Affairs & National Cultivar Improvement Center of Tropical Fruit Tree, Haikou, 571101, People's Republic of China
| | - Bang An
- Sanya Nanfan Research Institute of Hainan University, Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, School of Tropical Agriculture and Forestry, Hainan University, Sanya 572025, People's Republic of China.
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Teng R, Sun J, Nie Y, Li A, Liu X, Sun W, An B, Ma C, Liu S, Li W. An ultra-thin and highly efficient electromagnetic interference shielding composite paper with hydrophobic and antibacterial properties. Int J Biol Macromol 2023; 253:127510. [PMID: 37865363 DOI: 10.1016/j.ijbiomac.2023.127510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Revised: 09/04/2023] [Accepted: 10/07/2023] [Indexed: 10/23/2023]
Abstract
Facing the increasing electromagnetic interference (EMI) pollution in the living environment, it is a new trend to explore an efficient EMI shielding material with facile fabrication and a wide range of application scenarios. A hydrophobic composite paper composed of silver nanowires (AgNWs) and kapok microfibers cellulose (MFC) was modified by methyl trimethoxy silane (MTMS) through a simple method. As a result, the composite paper has a good EMI shielding effectiveness (EMI SE) of 61.7 dB with electrical conductivity of 695.41 S/cm. The modification of MTMS improved the thermal stability performance of composite paper, which also increased its water contact angle to 113°. The free silver ions (Ag+) released from AgNWs can kill surrounding microbial bacteria, endowing the composite paper with good antibacterial property. Water resistance and antibacterial property enable MTMS/AgNWs/MFC composite paper to cope with complex application environments.
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Affiliation(s)
- Rui Teng
- College of Materials Science and Engineering, Northeast Forestry University, Harbin 150040, China; Key Laboratory of Bio-based Material Science and Technology of the Ministry of Education, Northeast Forestry University, Harbin 150040, China
| | - Jiaming Sun
- College of Materials Science and Engineering, Northeast Forestry University, Harbin 150040, China; Key Laboratory of Bio-based Material Science and Technology of the Ministry of Education, Northeast Forestry University, Harbin 150040, China
| | - Yuxia Nie
- College of Materials Science and Engineering, Northeast Forestry University, Harbin 150040, China
| | - Anqi Li
- College of Materials Science and Engineering, Northeast Forestry University, Harbin 150040, China
| | - Xue Liu
- College of Materials Science and Engineering, Northeast Forestry University, Harbin 150040, China; Key Laboratory of Bio-based Material Science and Technology of the Ministry of Education, Northeast Forestry University, Harbin 150040, China
| | - Wenye Sun
- College of Materials Science and Engineering, Northeast Forestry University, Harbin 150040, China; Key Laboratory of Bio-based Material Science and Technology of the Ministry of Education, Northeast Forestry University, Harbin 150040, China
| | - Bang An
- College of Materials Science and Engineering, Northeast Forestry University, Harbin 150040, China; Key Laboratory of Bio-based Material Science and Technology of the Ministry of Education, Northeast Forestry University, Harbin 150040, China
| | - Chunhui Ma
- College of Materials Science and Engineering, Northeast Forestry University, Harbin 150040, China; Key Laboratory of Bio-based Material Science and Technology of the Ministry of Education, Northeast Forestry University, Harbin 150040, China
| | - Shouxin Liu
- College of Materials Science and Engineering, Northeast Forestry University, Harbin 150040, China; Key Laboratory of Bio-based Material Science and Technology of the Ministry of Education, Northeast Forestry University, Harbin 150040, China.
| | - Wei Li
- College of Materials Science and Engineering, Northeast Forestry University, Harbin 150040, China; Key Laboratory of Bio-based Material Science and Technology of the Ministry of Education, Northeast Forestry University, Harbin 150040, China.
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Gao M, Sang W, Mi K, Liu J, Liu Y, Zhen W, An B. The Relationship Between Theta Power, Theta Asymmetry and the Effect of Escitalopram in the Treatment of Depression. Neuropsychiatr Dis Treat 2023; 19:2241-2249. [PMID: 37900670 PMCID: PMC10612517 DOI: 10.2147/ndt.s425506] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Accepted: 10/05/2023] [Indexed: 10/31/2023] Open
Abstract
Objective Only about one-third of depressed patients respond to initial antidepressant treatment. Therefore, it is crucial to find effective predictors of antidepressants. The purpose of our study was to learn the relationship between EEG theta power, theta asymmetry, and the efficacy of escitalopram. Methods The study included 34 patients with depression. Before and after each patient's course of treatment, EEG data was gathered. Both the Hamilton Anxiety Scale (HAMA) and the 17-item Hamilton Depression Scale (HAMD-17) were evaluated simultaneously. The natural logarithm of right frontal theta power minus left frontal theta power was used to calculate inter-electrode theta asymmetry (AT). Results First, our study found no statistically significant difference between intra-electrode theta power and inter-electrode AT before and after treatment (P ≥ 0.05). When we later looked at the data regarding treatment effects, the findings revealed that patients (n = 9) who did not respond to treatment had lower baseline theta power at C4 [6.190 (2.000, 12.990) vs 15.800 (7.255, 22.330), z = -2.166, P = 0.030]. The two groups had no difference in other electrodes (P ≥ 0.05). The AT of C3/C4 in non-responders (n = 9) was lower [0.012 (0.795) vs 0.733 (0.539), t = -3.224, P = 0.005]. However, there was no difference in inter-electrode AT between the two groups in F3/F4 and F7/F8 (P ≥ 0.05). We finally show that the theta power at C4 was negatively correlated with HAMD scores before treatment (r = -0.346, P = 0.045). Conclusion Our findings determined that increased theta power and positive asymmetry in the right frontal-central area correlate with favourable escitalopram treatment, providing a basis for finding predictive markers for antidepressants.
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Affiliation(s)
- Min Gao
- Department of Affective Disorders II, Hebei Provincial Mental Health Center, Baoding, People’s Republic of China
- Xianyang Central Hospital, Xianyang Mental Health Center, Xianyang, People’s Republic of China
| | - Wenhua Sang
- Department of Affective Disorders II, Hebei Provincial Mental Health Center, Baoding, People’s Republic of China
- Hebei Key Laboratory of Major Mental and Behavioral Disorders, Baoding, People's Republic of China
- The Sixth Clinical Medical College of Hebei University, Baoding, People's Republic of China
| | - Kun Mi
- Department of Affective Disorders II, Hebei Provincial Mental Health Center, Baoding, People’s Republic of China
- Hebei Key Laboratory of Major Mental and Behavioral Disorders, Baoding, People's Republic of China
- The Sixth Clinical Medical College of Hebei University, Baoding, People's Republic of China
| | - Jiancong Liu
- Department of Affective Disorders II, Hebei Provincial Mental Health Center, Baoding, People’s Republic of China
- Hebei Key Laboratory of Major Mental and Behavioral Disorders, Baoding, People's Republic of China
- The Sixth Clinical Medical College of Hebei University, Baoding, People's Republic of China
| | - Yudong Liu
- Department of Affective Disorders II, Hebei Provincial Mental Health Center, Baoding, People’s Republic of China
- Hebei Key Laboratory of Major Mental and Behavioral Disorders, Baoding, People's Republic of China
- The Sixth Clinical Medical College of Hebei University, Baoding, People's Republic of China
| | - Wenge Zhen
- Department of Affective Disorders II, Hebei Provincial Mental Health Center, Baoding, People’s Republic of China
- Hebei Key Laboratory of Major Mental and Behavioral Disorders, Baoding, People's Republic of China
- The Sixth Clinical Medical College of Hebei University, Baoding, People's Republic of China
| | - Bang An
- Xianyang Central Hospital, Xianyang Mental Health Center, Xianyang, People’s Republic of China
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Yang Y, An B, Guo Y, Luo H, He C, Wang Q. A Novel Effector, FSE1, Regulates the Pathogenicity of Fusarium oxysporum f. sp. cubense Tropical Race 4 to Banana by Targeting the MYB Transcription Factor MaEFM-Like. J Fungi (Basel) 2023; 9:jof9040472. [PMID: 37108926 PMCID: PMC10144757 DOI: 10.3390/jof9040472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Revised: 04/11/2023] [Accepted: 04/12/2023] [Indexed: 04/29/2023] Open
Abstract
Phytopathogenic fungi secretes a range of effectors to manipulate plant defenses. Fusarium oxysporum f. sp. cubense tropical race 4 (Foc TR4) is a soil-borne pathogen that causes destructive banana wilt disease. Understanding the molecular mechanisms behind Foc TR4 effectors and their regulation of pathogenicity is helpful for developing disease control strategies. In the present study, we identified a novel effector, Fusarium special effector 1 (FSE1), in Foc TR4. We constructed FSE1 knock-out and overexpression mutants and investigated the functions of this effector. In vitro assays revealed that FSE1 was not required for vegetative growth and conidiation of Foc TR4. However, inoculation analysis of banana plantlets demonstrated that knock-out of FSE1 increased the disease index, while overexpression of FSE1 decreased it. Microscope analysis suggested that FSE1 was distributed in the cytoplasm and nuclei of plant cells. Furthermore, we identified an MYB transcription factor, MaEFM-like, as the target of FSE1, and the two proteins physically interacted in the nuclei of plant cells. In addition, Transient expression of MaEFM-like induced cell death in tobacco leaves. Our findings suggest that FSE1 is involved in the pathogenicity of Foc TR4 by targeting MaEFM-like.
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Affiliation(s)
- Yongbao Yang
- Sanya Nanfan Research Institute of Hainan University, College of Tropical Crops, Hainan University, Haikou 570228, China
- Hainan Yazhou Bay Seed Laboratory, Sanya 572025, China
| | - Bang An
- Sanya Nanfan Research Institute of Hainan University, College of Tropical Crops, Hainan University, Haikou 570228, China
- Hainan Yazhou Bay Seed Laboratory, Sanya 572025, China
| | - Yunfeng Guo
- Sanya Nanfan Research Institute of Hainan University, College of Tropical Crops, Hainan University, Haikou 570228, China
| | - Hongli Luo
- Sanya Nanfan Research Institute of Hainan University, College of Tropical Crops, Hainan University, Haikou 570228, China
- Hainan Yazhou Bay Seed Laboratory, Sanya 572025, China
| | - Chaozu He
- Sanya Nanfan Research Institute of Hainan University, College of Tropical Crops, Hainan University, Haikou 570228, China
- Hainan Yazhou Bay Seed Laboratory, Sanya 572025, China
| | - Qiannan Wang
- Sanya Nanfan Research Institute of Hainan University, College of Tropical Crops, Hainan University, Haikou 570228, China
- Hainan Yazhou Bay Seed Laboratory, Sanya 572025, China
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An B, Xu M, Sun J, Sun W, Miao Y, Ma C, Luo S, Li J, Li W, Liu S. Cellulose nanocrystals-based bio-composite optical materials for reversible colorimetric responsive films and coatings. Int J Biol Macromol 2023; 233:123600. [PMID: 36773875 DOI: 10.1016/j.ijbiomac.2023.123600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2022] [Revised: 01/18/2023] [Accepted: 02/05/2023] [Indexed: 02/11/2023]
Abstract
Photonic materials with a tunable chiral nematic structure that can selectively reflect light dynamically are valuable for applications in smart responsive materials. Here, we prepared potential photonic composites with a chiral nematic structure by forming cellulose nanocrystals (CNCs) and waterborne polyurethane (WPU) composites with different compositions on different substrates by evaporation-induced self-assembly. With increasing WPU content, the reflected wavelength increased from 400 to 680 nm, which was mainly caused by the increase of the chiral nematic pitch. In addition, the mechanical properties were better for higher WPU content. WPU was sensitive to small amounts of moisture in ethanol owing to the swollen WPU after absorbing water will increase the helical pitch. The reversible red shift induced by moisture was approximately 100 nm. When wood was used as the substrate, the CNCs still self-assembled to form chiral nematic structures and the adhesion forces of the composites to the wood substrate were strong. By using MgCl2 solution as an ink, invisible patterns can be written on the coating, which can be revealed temporarily by ethanol. In addition, the invisible pattern of photonic coating is rewritable. The easily prepared environmentally friendly photonic composite has great potential in sensors, anti-counterfeiting labels and smart decorative coatings.
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Affiliation(s)
- Bang An
- Key Laboratory of Bio-based Material Science and Technology of Ministry of Education, Northeast Forestry University, Harbin 150040, China
| | - Mingcong Xu
- Key Laboratory of Bio-based Material Science and Technology of Ministry of Education, Northeast Forestry University, Harbin 150040, China
| | - Jiaming Sun
- Key Laboratory of Bio-based Material Science and Technology of Ministry of Education, Northeast Forestry University, Harbin 150040, China
| | - Wenye Sun
- Key Laboratory of Bio-based Material Science and Technology of Ministry of Education, Northeast Forestry University, Harbin 150040, China
| | - Yuanyuan Miao
- Key Laboratory of Bio-based Material Science and Technology of Ministry of Education, Northeast Forestry University, Harbin 150040, China
| | - Chunhui Ma
- Key Laboratory of Bio-based Material Science and Technology of Ministry of Education, Northeast Forestry University, Harbin 150040, China
| | - Sha Luo
- Key Laboratory of Bio-based Material Science and Technology of Ministry of Education, Northeast Forestry University, Harbin 150040, China
| | - Jian Li
- Engineering Research Center of Advanced Wooden Materials, Ministry of Education, Northeast Forestry University, Harbin 150040, China
| | - Wei Li
- Key Laboratory of Bio-based Material Science and Technology of Ministry of Education, Northeast Forestry University, Harbin 150040, China.
| | - Shouxin Liu
- Engineering Research Center of Advanced Wooden Materials, Ministry of Education, Northeast Forestry University, Harbin 150040, China.
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Zhang X, Dong M, Zheng G, Zhu J, An B, Zhou Z, Bi Y, Sun M, Zhang C, Lian J, Tang S, Wang X, Liu W. Inhibition of proliferation and migration of hepatocellular carcinoma by knockdown of KIF3A via NF-κB signal pathway.. [DOI: 10.21203/rs.3.rs-2421333/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
AbstractBackground The up-regulation of KIF3A possibly predicts the dismal prognostic outcome of hepatocellular carcinoma (HCC). The present work is focused on investigating KIF3A’s function in the growth and migration of HCC cells. Methods KIF3A expression and its role in predicting HCC prognosis were assessed using the TCGA and Genotype-Tissue Expression (GTEx) databases. KIF3A detection conditions in HCC patients were studied using an immunohistochemical panel. siKIF3A was created and then transfected into HepG2 HCC cells. Cell proliferation was examined with the use of the EDU and CCK8. Using the scratch wound healing assays, cell migration was assessed. RT-PCR and Western-blot (WB) assays were adopted for evaluating the expression of genes and proteins. Results KIF3A expression increased in HCC tissues as compared to matched non-carcinoma samples, and it was tightly associated with poor survival and risk factors (Ps < 0.05). KIF3A knockdown hindered the proliferation and migration of HCC cells (Ps < 0.05). KIF3A silencing reduced RelA (NF-κBp65) expression, thus, affecting the activity of HCC cells (Ps < 0.05). Conclusion In this study, the oncogene of hepatocellular carcinoma is KIF3A. Silencing KIF3A inhibited HCC cell growth and migration by suppressing the NF-κB signal pathway. KIF3A was identified as a potential new anti-HCC therapeutic target.
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Affiliation(s)
| | | | | | | | - Bang An
- Shantou University Medical College
| | | | | | - Meng Sun
- Shantou University Medical College
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Jia M, An B, Yan B, Ma Q, Wen B, Zhao S, Gao C, Ma X, Zhang L, Li B, Zhang P, Wang J, Yu H, Wang W. A comparison of clinical characteristics of psychiatric inpatients in three hospitals from Western China and America. BMC Psychiatry 2023; 23:6. [PMID: 36597094 PMCID: PMC9811694 DOI: 10.1186/s12888-022-04500-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Accepted: 12/27/2022] [Indexed: 01/05/2023] Open
Abstract
BACKGROUND Different countries have differences in social and cultural context and health system, which may affect the clinical characteristics of psychiatric inpatients. This study was the first to compare cross-cultural differences in the clinical characteristics of psychiatric inpatients in three hospitals from Western China and America. METHODS Overall, 905 and 1318 patients from three hospitals, one in America and two in Western China, respectively, were included. We used a standardised protocol and data collection procedure to record inpatients' sociodemographic and clinical characteristics. RESULTS Significant differences were found between hospitals from the two countries. Positive symptoms were the main reason for admission in the Chinese hospitals, while reported suicide and self-injury symptoms more frequently led to hospital admission in America. Moreover, there were more inpatients with combined substance abuse in the American hospital (97.6% vs. 1.9%, P < 0.001). The length of stay (LOS) in America was generally shorter than in China (10.5 ± 11.9 vs. 20.7 ± 13.4, P < 0.001). The dosage of antipsychotic drugs used in the American hospital was higher than in China (275.1 ± 306.9 mg vs. 238.3 ± 212.5 mg, P = 0.002). Regression analysis showed that male sex, older age, retirees, being admitted because of physical symptoms, and using higher doses of antipsychotic drugs were significantly associated with longer hospitalisation in the American hospital (P < 0.05). Comparatively, patients who were divorced, experiencing suicidal ideation, admitted involuntarily, admitted because of physical, depression, or anxiety symptoms, and using higher doses of antipsychotic drugs had longer hospitalisation in Chinese hospitals (P < 0.05). CONCLUSION Significant variations in clinical characteristics of inpatients were found between hospitals from Western China and America. The LOS in Chinese hospitals was significantly longer, but patients used higher doses of antipsychotic drugs in the American hospital. Admission due to physical symptoms and the use of higher dosage drugs were related to longer LOS in both countries.
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Affiliation(s)
- Min Jia
- grid.452438.c0000 0004 1760 8119Department of Psychiatry, The First Affiliated Hospital of Xi’an Jiaotong University, 277 Yanta West Road, Xi’an, 710061 China
| | - Bang An
- grid.440299.2Department of Psychiatry, Xianyang Central Hospital, 78 Renmin East Road, Xianyang, 712099 China
| | - Bin Yan
- grid.452438.c0000 0004 1760 8119Clinical Research Center for Psychiatric Medicine of Shaanxi Province, The First Affiliated Hospital of Xi’an Jiaotong University, 277 Yanta West Road, Xi’an, 710061 China
| | - Qingyan Ma
- grid.452438.c0000 0004 1760 8119Department of Psychiatry, The First Affiliated Hospital of Xi’an Jiaotong University, 277 Yanta West Road, Xi’an, 710061 China
| | - Binglong Wen
- grid.452438.c0000 0004 1760 8119Department of Psychiatry, The First Affiliated Hospital of Xi’an Jiaotong University, 277 Yanta West Road, Xi’an, 710061 China
| | - Shanshan Zhao
- grid.440299.2Department of Psychiatry, Xianyang Central Hospital, 78 Renmin East Road, Xianyang, 712099 China
| | - Chengge Gao
- grid.452438.c0000 0004 1760 8119Department of Psychiatry, The First Affiliated Hospital of Xi’an Jiaotong University, 277 Yanta West Road, Xi’an, 710061 China
| | - Xiancang Ma
- grid.452438.c0000 0004 1760 8119Department of Psychiatry, The First Affiliated Hospital of Xi’an Jiaotong University, 277 Yanta West Road, Xi’an, 710061 China
| | - Lili Zhang
- grid.452427.20000 0004 6831 978XDepartment of Sleep Medicine, Hebei Mental Health Center, 572 Dongfeng East Road, Baoding, 050899 China
| | - Bin Li
- grid.452427.20000 0004 6831 978XDepartment of Sleep Medicine, Hebei Mental Health Center, 572 Dongfeng East Road, Baoding, 050899 China
| | - Ping Zhang
- grid.452427.20000 0004 6831 978XDepartment of Sleep Medicine, Hebei Mental Health Center, 572 Dongfeng East Road, Baoding, 050899 China
| | - Jian Wang
- grid.452427.20000 0004 6831 978XDepartment of Sleep Medicine, Hebei Mental Health Center, 572 Dongfeng East Road, Baoding, 050899 China
| | - Hong Yu
- University at Buffalo-Psychiatry, Erie County Medical Center, 462 Grider Street, Buffalo, New York, USA.
| | - Wei Wang
- Department of Psychiatry, The First Affiliated Hospital of Xi'an Jiaotong University, 277 Yanta West Road, Xi'an, 710061, China.
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11
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Zhao L, Liao Z, Feng L, An B, He C, Wang Q, Luo H. Colletotrichum gloeosporioides Cg2LysM contributed to virulence toward rubber tree through affecting invasive structure and inhibiting chitin-triggered plant immunity. Front Microbiol 2023; 14:1129101. [PMID: 36876102 PMCID: PMC9982014 DOI: 10.3389/fmicb.2023.1129101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Accepted: 01/30/2023] [Indexed: 02/19/2023] Open
Abstract
Fungal chitin, as a typical microorganism-associated molecular pattern (PAMP), was recognized by plant LysM-containing protein to induce immunity called pattern-triggered immunity (PTI). To successfully infect host plant, fungal pathogens secreted LysM-containing effectors to inhibit chitin-induced plant immunity. Filamentous fungus Colletotrichum gloeosporioides caused rubber tree anthracnose which resulted in serious loss of natural rubber production worldwide. However, little is known about the pathogenesis mediated by LysM effector of C. gloeosporioide. In this study, we identified a two LysM-containing effector in C. gloeosporioide and named as Cg2LysM. Cg2LysM was involved not only in conidiation, appressorium formation, invasion growth and the virulence to rubber tree, but also in melanin synthesis of C. gloeosporioides. Moreover, Cg2LysM showed chitin-binding activity and suppression of chitin-triggered immunity of rubber tree such as ROS production and the expression of defense relative genes HbPR1, HbPR5, HbNPR1 and HbPAD4. This work suggested that Cg2LysM effector facilitate infection of C. gloeosporioides to rubber tree through affecting invasive structure and inhibiting chitin-triggered plant immunity.
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Affiliation(s)
- Li Zhao
- School of Life Sciences, Hainan University, Haikou, China
| | - Zhiwen Liao
- College of Tropical Corps, Hainan University, Haikou, China.,Sanya Nanfan Research Institute of Hainan University, Hainan Yazhou Bay Seed Laboratory, Sanya, China
| | - Liping Feng
- College of Tropical Corps, Hainan University, Haikou, China
| | - Bang An
- College of Tropical Corps, Hainan University, Haikou, China.,Sanya Nanfan Research Institute of Hainan University, Hainan Yazhou Bay Seed Laboratory, Sanya, China
| | - Chaozu He
- College of Tropical Corps, Hainan University, Haikou, China.,Sanya Nanfan Research Institute of Hainan University, Hainan Yazhou Bay Seed Laboratory, Sanya, China
| | - Qiannan Wang
- College of Tropical Corps, Hainan University, Haikou, China.,Sanya Nanfan Research Institute of Hainan University, Hainan Yazhou Bay Seed Laboratory, Sanya, China
| | - Hongli Luo
- College of Tropical Corps, Hainan University, Haikou, China.,Sanya Nanfan Research Institute of Hainan University, Hainan Yazhou Bay Seed Laboratory, Sanya, China
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12
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Shen J, An B, Xu M, Gan D, Pan T. Internal or External Word-of-Mouth (WOM), Why Do Patients Choose Doctors on Online Medical Services (OMSs) Single Platform in China? Int J Environ Res Public Health 2022; 19:13293. [PMID: 36293874 PMCID: PMC9603608 DOI: 10.3390/ijerph192013293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Revised: 10/11/2022] [Accepted: 10/12/2022] [Indexed: 06/16/2023]
Abstract
(1) Background: Word-of-mouth (WOM) can influence patients' choice of doctors in online medical services (OMSs). Previous studies have explored the relationship between internal WOM in online healthcare communities (OHCs) and patients' choice of doctors. There is a lack of research on external WOM and position ranking in OMSs. (2) Methods: We develop an empirical model based on the data of 4435 doctors from a leading online healthcare community in China. We discuss the influence of internal and external WOM on patients' choice of doctors in OMSs, exploring the interaction between internal and external WOM and the moderation of doctor position ranking. (3) Results: Both internal and external WOM had a positive impact on patients' choice of doctors; there was a significant positive interaction between internal and third-party generated WOM, but the interaction between internal and relative-generated WOM, and the interaction between internal and doctor-generated WOM were both nonsignificant. The position ranking of doctors significantly enhanced the impact of internal WOM, whereas it weakened the impact of doctor recommendations on patients' choice of doctors. (4) The results emphasize the importance of the research on external WOM in OMSs, and suggest that the moderation of internal WOM may be related to the credibility and accessibility of external WOM, and the impact of doctor position ranking can be explained by information search costs.
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Affiliation(s)
- Jiang Shen
- College of Management and Economy, Tianjin University, Tianjin 300072, China
| | - Bang An
- College of Management and Economy, Tianjin University, Tianjin 300072, China
| | - Man Xu
- Business School, Nankai University, Tianjin 300071, China
| | - Dan Gan
- School of Economics and Management, Hebei University of Technology, Tianjin 300071, China
| | - Ting Pan
- College of Management and Economy, Tianjin University, Tianjin 300072, China
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13
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Zhang Y, An B, Wang W, Zhang B, He C, Luo H, Wang Q. Actin-bundling protein fimbrin regulates pathogenicity via organizing F-actin dynamics during appressorium development in Colletotrichum gloeosporioides. Mol Plant Pathol 2022; 23:1472-1486. [PMID: 35791045 PMCID: PMC9452767 DOI: 10.1111/mpp.13242] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Revised: 06/12/2022] [Accepted: 06/14/2022] [Indexed: 06/15/2023]
Abstract
Anthracnose caused by Colletotrichum gloeosporioides leads to serious economic loss to rubber tree yield and other tropical crops. The appressorium, a specialized dome-shaped infection structure, plays a crucial role in the pathogenesis of C. gloeosporioides. However, the mechanism of how actin cytoskeleton dynamics regulate appressorium formation and penetration remains poorly defined in C. gloeosporioides. In this study, an actin cross-linking protein fimbrin homologue (CgFim1) was identified in C. gloeosporioides, and the knockout of CgFim1 led to impairment in vegetative growth, conidiation, and pathogenicity. We then investigated the roles of CgFim1 in the dynamic organization of the actin cytoskeleton. We observed that actin patches and cables localized at the apical and subapical regions of the hyphal tip, and showed a disc-to-ring dynamic around the pore during appressorium development. CgFim1 showed a similar distribution pattern to the actin cytoskeleton. Moreover, knockout of CgFim1 affected the polarity of the actin cytoskeleton in the hyphal tip and disrupted the actin dynamics and ring structure formation in the appressorium, which prevented polar growth and appressorium development. The CgFim1 mutant also interfered with the septin structure formation. This caused defects in pore wall overlay formation, pore contraction, and the extension of the penetration peg. These results reveal the mechanism by which CgFim1 regulates the growth and pathogenicity of C. gloeosporioides by organizing the actin cytoskeleton.
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Affiliation(s)
- Yi Zhang
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, Key Laboratory of Biotechnology of Salt Tolerant Crops of Hainan ProvinceCollege of Tropical Crops, Hainan UniversityHaikouChina
- Sanya Nanfan Research Institute of Hainan University, Hainan Yazhou Bay Seed LaboratorySanyaChina
| | - Bang An
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, Key Laboratory of Biotechnology of Salt Tolerant Crops of Hainan ProvinceCollege of Tropical Crops, Hainan UniversityHaikouChina
- Sanya Nanfan Research Institute of Hainan University, Hainan Yazhou Bay Seed LaboratorySanyaChina
| | - Wenfeng Wang
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, Key Laboratory of Biotechnology of Salt Tolerant Crops of Hainan ProvinceCollege of Tropical Crops, Hainan UniversityHaikouChina
| | - Bei Zhang
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, Key Laboratory of Biotechnology of Salt Tolerant Crops of Hainan ProvinceCollege of Tropical Crops, Hainan UniversityHaikouChina
- Sanya Nanfan Research Institute of Hainan University, Hainan Yazhou Bay Seed LaboratorySanyaChina
| | - Chaozu He
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, Key Laboratory of Biotechnology of Salt Tolerant Crops of Hainan ProvinceCollege of Tropical Crops, Hainan UniversityHaikouChina
- Sanya Nanfan Research Institute of Hainan University, Hainan Yazhou Bay Seed LaboratorySanyaChina
| | - Hongli Luo
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, Key Laboratory of Biotechnology of Salt Tolerant Crops of Hainan ProvinceCollege of Tropical Crops, Hainan UniversityHaikouChina
- Sanya Nanfan Research Institute of Hainan University, Hainan Yazhou Bay Seed LaboratorySanyaChina
| | - Qiannan Wang
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, Key Laboratory of Biotechnology of Salt Tolerant Crops of Hainan ProvinceCollege of Tropical Crops, Hainan UniversityHaikouChina
- Sanya Nanfan Research Institute of Hainan University, Hainan Yazhou Bay Seed LaboratorySanyaChina
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14
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Liu N, Wang W, He C, Luo H, An B, Wang Q. NADPH Oxidases Play a Role in Pathogenicity via the Regulation of F-Actin Organization in Colletotrichum gloeosporioides. Front Cell Infect Microbiol 2022; 12:845133. [PMID: 35782153 PMCID: PMC9240266 DOI: 10.3389/fcimb.2022.845133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Accepted: 05/16/2022] [Indexed: 11/29/2022] Open
Abstract
Multiunit-flavoenzyme NADPH oxidases (NOXs) play multiple roles in living cells via regulating signaling pathways. In several phytopathogenic fungi, NOXs are required for the polarized growth of hyphal tips and pathogenicity to host plants, but the possible mechanisms are still elusive. In our previous study, CgNOXA, CgNOXB, and CgNOXR were identified as components of the NOX complex in Colletotrichum gloeosporioides. The growth and the inoculation assays revealed that CgNOXA/B and CgNOXR regulate vegetative growth and are required for the full pathogenicity of C. gloeosporioides to Hevea leaves. We further demonstrated that the vital roles of CgNOXB and CgNOXR in appressorium formation and the development of invasion hyphae account for their functions in pathogenicity. Moreover, CgNOXB and CgNOXR regulate the production and distribution of ROS in hyphal tips and appressoria, control the specialized remodeling of F-actin in hyphal tips and appressoria, and are involved in fungal cell wall biosynthesis. Taken together, our findings highlight the role of NOXs in fungal pathogenicity through the organization of the actin cytoskeleton.
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Affiliation(s)
- Na Liu
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, College of Tropical Crops, Hainan University, Haikou, China
- Sanya Nanfan Research Institute of Hainan University, Hainan Yazhou Bay Seed Laboratory, Sanya, China
| | - Wenfeng Wang
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, College of Tropical Crops, Hainan University, Haikou, China
| | - Chaozu He
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, College of Tropical Crops, Hainan University, Haikou, China
- Sanya Nanfan Research Institute of Hainan University, Hainan Yazhou Bay Seed Laboratory, Sanya, China
| | - Hongli Luo
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, College of Tropical Crops, Hainan University, Haikou, China
- Sanya Nanfan Research Institute of Hainan University, Hainan Yazhou Bay Seed Laboratory, Sanya, China
| | - Bang An
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, College of Tropical Crops, Hainan University, Haikou, China
- Sanya Nanfan Research Institute of Hainan University, Hainan Yazhou Bay Seed Laboratory, Sanya, China
| | - Qiannan Wang
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, College of Tropical Crops, Hainan University, Haikou, China
- Sanya Nanfan Research Institute of Hainan University, Hainan Yazhou Bay Seed Laboratory, Sanya, China
- *Correspondence: Qiannan Wang,
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15
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Yang G, Yang J, Zhang Q, Wang W, Feng L, Zhao L, An B, Wang Q, He C, Luo H. The Effector Protein CgNLP1 of Colletotrichum gloeosporioides Affects Invasion and Disrupts Nuclear Localization of Necrosis-Induced Transcription Factor HbMYB8-Like to Suppress Plant Defense Signaling. Front Microbiol 2022; 13:911479. [PMID: 35770165 PMCID: PMC9234567 DOI: 10.3389/fmicb.2022.911479] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2022] [Accepted: 05/13/2022] [Indexed: 11/13/2022] Open
Abstract
Fungi secrete numerous effectors to modulate host defense systems. Understanding the molecular mechanisms by which fungal effectors regulate plant defense is of great importance for the development of novel strategies for disease control. In this study, we identified necrosis- and ethylene-inducing protein 1 (Nep1)-like protein (NLP) effector gene, CgNLP1, which contributed to conidial germination, appressorium formation, invasive growth, and virulence of Colletotrichum gloeosporioides to the rubber tree. Transient expression of CgNLP1 in the leaves of Nicotiana benthamiana induced ethylene production in plants. Ectopic expression of CgNLP1 in Arabidopsis significantly enhanced the resistance to Botrytis cinerea and Alternaria brassicicola. An R2R3 type transcription factor HbMYB8-like of rubber tree was identified as the target of CgNLP1.HbMYB8-like, localized on the nucleus, and induced cell death in N. benthamiana. CgNLP1 disrupted nuclear accumulation of HbMYB8-like and suppressed HbMYB8-like induced cell death, which is mediated by the salicylic acid (SA) signal pathway. This study suggested a new strategy whereby C. gloeosporioides exploited the CgNLP1 effector to affect invasion and suppress a host defense regulator HbMYB8-like to facilitate infection.
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Affiliation(s)
- Guangyong Yang
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Tropical Corps, Hainan University, Haikou, China
- Hainan Yazhou Bay Seed Laboratory, Sanya Nanfan Research Institute of Hainan University, Sanya, China
| | - Jie Yang
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Tropical Corps, Hainan University, Haikou, China
- Hainan Yazhou Bay Seed Laboratory, Sanya Nanfan Research Institute of Hainan University, Sanya, China
| | - Qiwei Zhang
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Tropical Corps, Hainan University, Haikou, China
- Hainan Yazhou Bay Seed Laboratory, Sanya Nanfan Research Institute of Hainan University, Sanya, China
| | - Wenfeng Wang
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Tropical Corps, Hainan University, Haikou, China
| | - Liping Feng
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Tropical Corps, Hainan University, Haikou, China
| | - Li Zhao
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Tropical Corps, Hainan University, Haikou, China
| | - Bang An
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Tropical Corps, Hainan University, Haikou, China
- Hainan Yazhou Bay Seed Laboratory, Sanya Nanfan Research Institute of Hainan University, Sanya, China
| | - Qiannan Wang
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Tropical Corps, Hainan University, Haikou, China
- Hainan Yazhou Bay Seed Laboratory, Sanya Nanfan Research Institute of Hainan University, Sanya, China
| | - Chaozu He
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Tropical Corps, Hainan University, Haikou, China
- Hainan Yazhou Bay Seed Laboratory, Sanya Nanfan Research Institute of Hainan University, Sanya, China
| | - Hongli Luo
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Tropical Corps, Hainan University, Haikou, China
- Hainan Yazhou Bay Seed Laboratory, Sanya Nanfan Research Institute of Hainan University, Sanya, China
- *Correspondence: Hongli Luo
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16
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Xu M, Li G, Li W, An B, Sun J, Chen Z, Yu H, Li J, Yang G, Liu S. Exploring the Circular Polarization Capacity from Chiral Cellulose Nanocrystal Films for a Photo-Controlled Chiral Helix of Supramolecular Polymers. Angew Chem Int Ed Engl 2022; 61:e202117042. [PMID: 35132754 DOI: 10.1002/anie.202117042] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Indexed: 11/08/2022]
Abstract
Circularly polarized light (CPL) is key to asymmetric photochemistry as it could impart the chiral organization information into chemical products. Here, we demonstrate the circular polarization capacity of chiral cellulose nanocrystal (CNC) films to trigger photo-alignment of achiral supramolecular polymers into helical structures. Right-handed transmitted (T-) CPL was generated from self-assembled CNC films, which induced amorphous azobenzene (Azo) supramolecular polymers into chiral structures. The chiral induction effect of T-CPL is enhanced on Azo polymers with longer spacers. The absorptive dissymmetry factor (gabs ) values of liquid-crystal supramolecular polymers can be amplified significantly (over 10 times) after T-CPL irradiation. Moreover, by integrating carbon dots into CNC films, CPL emission with a considerable luminescence dissymmetry factor (glum ) up to -0.66 was achieved, and it could be used for the photo-alignment of Azo polymers with high chiroptical properties. This work provides new insight for the photo modulation of supramolecular polymers by CPL-active materials.
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Affiliation(s)
- Mingcong Xu
- Key Laboratory of Bio-based Material Science and Technology of Ministry of Education, Northeast Forestry University, 26 Hexing Road, Harbin, 150040, P. R. China
| | - Guangyao Li
- Department of Chemistry and Chemical Engineering, College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, 26 Hexing Road, Harbin, 150040, P. R. China
| | - Wei Li
- Key Laboratory of Bio-based Material Science and Technology of Ministry of Education, Northeast Forestry University, 26 Hexing Road, Harbin, 150040, P. R. China
| | - Bang An
- Key Laboratory of Bio-based Material Science and Technology of Ministry of Education, Northeast Forestry University, 26 Hexing Road, Harbin, 150040, P. R. China
| | - Jiaming Sun
- Key Laboratory of Bio-based Material Science and Technology of Ministry of Education, Northeast Forestry University, 26 Hexing Road, Harbin, 150040, P. R. China
| | - Zhijun Chen
- Key Laboratory of Bio-based Material Science and Technology of Ministry of Education, Northeast Forestry University, 26 Hexing Road, Harbin, 150040, P. R. China
| | - Haipeng Yu
- Key Laboratory of Bio-based Material Science and Technology of Ministry of Education, Northeast Forestry University, 26 Hexing Road, Harbin, 150040, P. R. China
| | - Jian Li
- Key Laboratory of Bio-based Material Science and Technology of Ministry of Education, Northeast Forestry University, 26 Hexing Road, Harbin, 150040, P. R. China
| | - Guang Yang
- Department of Chemistry and Chemical Engineering, College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, 26 Hexing Road, Harbin, 150040, P. R. China
| | - Shouxin Liu
- Key Laboratory of Bio-based Material Science and Technology of Ministry of Education, Northeast Forestry University, 26 Hexing Road, Harbin, 150040, P. R. China
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Xu M, Li G, Li W, An B, Sun J, Chen Z, Yu H, Li J, Yang G, Liu S. Exploring the Circular Polarization Capacity from Chiral Cellulose Nanocrystal Films for a Photo‐Controlled Chiral Helix of Supramolecular Polymers. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202117042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Mingcong Xu
- Key Laboratory of Bio-based Material Science and Technology of Ministry of Education Northeast Forestry University 26 Hexing Road Harbin 150040 P. R. China
| | - Guangyao Li
- Department of Chemistry and Chemical Engineering College of Chemistry Chemical Engineering and Resource Utilization Northeast Forestry University 26 Hexing Road Harbin 150040 P. R. China
| | - Wei Li
- Key Laboratory of Bio-based Material Science and Technology of Ministry of Education Northeast Forestry University 26 Hexing Road Harbin 150040 P. R. China
| | - Bang An
- Key Laboratory of Bio-based Material Science and Technology of Ministry of Education Northeast Forestry University 26 Hexing Road Harbin 150040 P. R. China
| | - Jiaming Sun
- Key Laboratory of Bio-based Material Science and Technology of Ministry of Education Northeast Forestry University 26 Hexing Road Harbin 150040 P. R. China
| | - Zhijun Chen
- Key Laboratory of Bio-based Material Science and Technology of Ministry of Education Northeast Forestry University 26 Hexing Road Harbin 150040 P. R. China
| | - Haipeng Yu
- Key Laboratory of Bio-based Material Science and Technology of Ministry of Education Northeast Forestry University 26 Hexing Road Harbin 150040 P. R. China
| | - Jian Li
- Key Laboratory of Bio-based Material Science and Technology of Ministry of Education Northeast Forestry University 26 Hexing Road Harbin 150040 P. R. China
| | - Guang Yang
- Department of Chemistry and Chemical Engineering College of Chemistry Chemical Engineering and Resource Utilization Northeast Forestry University 26 Hexing Road Harbin 150040 P. R. China
| | - Shouxin Liu
- Key Laboratory of Bio-based Material Science and Technology of Ministry of Education Northeast Forestry University 26 Hexing Road Harbin 150040 P. R. China
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18
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Gao X, Wang Q, Feng Q, Zhang B, He C, Luo H, An B. Heat Shock Transcription Factor CgHSF1 Is Required for Melanin Biosynthesis, Appressorium Formation, and Pathogenicity in Colletotrichum gloeosporioides. J Fungi (Basel) 2022; 8:jof8020175. [PMID: 35205929 PMCID: PMC8876323 DOI: 10.3390/jof8020175] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Revised: 02/06/2022] [Accepted: 02/07/2022] [Indexed: 01/09/2023] Open
Abstract
Heat shock transcription factors (HSFs) are a family of transcription regulators. Although HSFs’ functions in controlling the transcription of the molecular chaperone heat shock proteins and resistance to stresses are well established, their effects on the pathogenicity of plant pathogenic fungi remain unknown. In this study, we analyze the role of CgHSF1 in the pathogenicity of Colletotrichum gloeosporioides and investigate the underlying mechanism. Failure to generate the Cghsf1 knock-out mutant suggested that the gene is essential for the viability of the fungus. Then, genetic depletion of the Cghsf1 was achieved by inserting the repressive promoter of nitrite reductase gene (PniiA) before its coding sequence. The mutant showed significantly decrease in the pathogenicity repression of appressorium formation, and severe defects in melanin biosynthesis. Moreover, four melanin synthetic genes were identified as direct targets of CgHSF1. Taken together, this work highlights the role of CgHSF1 in fungal pathogenicity via the transcriptional activation of melanin biosynthesis. Our study extends the understanding of fungal HSF1 proteins, especially their involvement in pathogenicity.
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Affiliation(s)
- Xuesheng Gao
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, College of Tropical Crops, Hainan University, Haikou 570228, China; (X.G.); (Q.W.); (Q.F.); (B.Z.); (C.H.)
- Sanya Nanfan Research Institute, Hainan University, Sanya 572025, China
| | - Qiannan Wang
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, College of Tropical Crops, Hainan University, Haikou 570228, China; (X.G.); (Q.W.); (Q.F.); (B.Z.); (C.H.)
- Sanya Nanfan Research Institute, Hainan University, Sanya 572025, China
| | - Qingdeng Feng
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, College of Tropical Crops, Hainan University, Haikou 570228, China; (X.G.); (Q.W.); (Q.F.); (B.Z.); (C.H.)
| | - Bei Zhang
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, College of Tropical Crops, Hainan University, Haikou 570228, China; (X.G.); (Q.W.); (Q.F.); (B.Z.); (C.H.)
- Sanya Nanfan Research Institute, Hainan University, Sanya 572025, China
| | - Chaozu He
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, College of Tropical Crops, Hainan University, Haikou 570228, China; (X.G.); (Q.W.); (Q.F.); (B.Z.); (C.H.)
- Sanya Nanfan Research Institute, Hainan University, Sanya 572025, China
| | - Hongli Luo
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, College of Tropical Crops, Hainan University, Haikou 570228, China; (X.G.); (Q.W.); (Q.F.); (B.Z.); (C.H.)
- Sanya Nanfan Research Institute, Hainan University, Sanya 572025, China
- Correspondence: (H.L.); (B.A.)
| | - Bang An
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, College of Tropical Crops, Hainan University, Haikou 570228, China; (X.G.); (Q.W.); (Q.F.); (B.Z.); (C.H.)
- Sanya Nanfan Research Institute, Hainan University, Sanya 572025, China
- Correspondence: (H.L.); (B.A.)
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Liu J, An B, Luo H, He C, Wang Q. The histone acetyltransferase FocGCN5 regulates growth, conidiation, and pathogenicity of the banana wilt disease causal agent Fusarium oxysporum f.sp. cubense tropical race 4. Res Microbiol 2021; 173:103902. [PMID: 34838989 DOI: 10.1016/j.resmic.2021.103902] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Revised: 11/05/2021] [Accepted: 11/16/2021] [Indexed: 10/19/2022]
Abstract
Chromatin structure modifications by histone acetyltransferase are involved in multiple biological processes in eukaryotes. In the present study, the GCN5 homologue FocGCN5 was identified in Fusarium oxysporum f. sp. cubense tropical race 4 (Foc TR4). The coding gene was then knocked out to investigate the roles of FocGNC5. The mutant ΔFocGCN5 was found significantly reduced in growth rate and conidiation, and almost completely lost pathogenicity to banana plantlets. The RNA-seq analysis provide an insight into the underlying mechanism. Firstly, transcription of the genes involved in carbohydrate metabolism and fungal cell wall synthesis was reduced in ΔFocGCN5, leading to the impairment of apical deposition of cell-wall material. Secondly, FocabaA, one of the pivotal regulators of conidiation, was significantly reduced in expression in ΔFocGCN5, which might be the main cause of the conidiation reduction. Thirdly, the pathogenicity-associated factors, including effectors and plant cell wall degrading enzymes, were almost all down-regulated in ΔFocGCN5, which accounts for the decrease of pathogenicity. In addition, the stress tolerance to salt, heat, and cell wall inhibitors was slightly increased in ΔFocGCN5. Taken together, our studies clarify the roles of FocGCN5 in growth, conidiation, and pathogenicity of Foc TR4, and explore the possible mechanism behind its biological functions.
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Affiliation(s)
- Jingjing Liu
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, College of Tropical Crops, Hainan University, Haikou 570228, Hainan, People's Republic of China
| | - Bang An
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, College of Tropical Crops, Hainan University, Haikou 570228, Hainan, People's Republic of China
| | - Hongli Luo
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, College of Tropical Crops, Hainan University, Haikou 570228, Hainan, People's Republic of China
| | - Chaozu He
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, College of Tropical Crops, Hainan University, Haikou 570228, Hainan, People's Republic of China
| | - Qiannan Wang
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, College of Tropical Crops, Hainan University, Haikou 570228, Hainan, People's Republic of China.
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Shen J, Wu J, Xu M, Gan D, An B, Liu F. A Hybrid Method to Predict Postoperative Survival of Lung Cancer Using Improved SMOTE and Adaptive SVM. Comput Math Methods Med 2021; 2021:2213194. [PMID: 34545291 PMCID: PMC8449740 DOI: 10.1155/2021/2213194] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Revised: 06/09/2021] [Accepted: 08/21/2021] [Indexed: 11/18/2022]
Abstract
Predicting postoperative survival of lung cancer patients (LCPs) is an important problem of medical decision-making. However, the imbalanced distribution of patient survival in the dataset increases the difficulty of prediction. Although the synthetic minority oversampling technique (SMOTE) can be used to deal with imbalanced data, it cannot identify data noise. On the other hand, many studies use a support vector machine (SVM) combined with resampling technology to deal with imbalanced data. However, most studies require manual setting of SVM parameters, which makes it difficult to obtain the best performance. In this paper, a hybrid improved SMOTE and adaptive SVM method is proposed for imbalance data to predict the postoperative survival of LCPs. The proposed method is divided into two stages: in the first stage, the cross-validated committees filter (CVCF) is used to remove noise samples to improve the performance of SMOTE. In the second stage, we propose an adaptive SVM, which uses fuzzy self-tuning particle swarm optimization (FPSO) to optimize the parameters of SVM. Compared with other advanced algorithms, our proposed method obtains the best performance with 95.11% accuracy, 95.10% G-mean, 95.02% F1, and 95.10% area under the curve (AUC) for predicting postoperative survival of LCPs.
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Affiliation(s)
- Jiang Shen
- College of Management and Economics, Tianjin University, Tianjin 300072, China
| | - Jiachao Wu
- College of Management and Economics, Tianjin University, Tianjin 300072, China
| | - Man Xu
- Business School, Nankai University, Tianjin 300071, China
| | - Dan Gan
- School of Economics and Management, Hebei University of Technology, Tianjin 300071, China
| | - Bang An
- College of Management and Economics, Tianjin University, Tianjin 300072, China
| | - Fusheng Liu
- College of Management and Economics, Tianjin University, Tianjin 300072, China
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21
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Wang Y, Liu Y, Zhou J, Yue J, Xu M, An B, Ma C, Li W, Liu S. Hydrothermal synthesis of nitrogen-doped carbon quantum dots from lignin for formaldehyde determination. RSC Adv 2021; 11:29178-29185. [PMID: 35479568 PMCID: PMC9040886 DOI: 10.1039/d1ra05370a] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Accepted: 08/20/2021] [Indexed: 02/03/2023] Open
Abstract
This work assessed the fabrication of nitrogen-doped CQDs (NCQDs) from alkali lignin (AL) obtained from spruce, representing a green, low-cost biomass generated by the pulp and biorefinery industries. The AL was found to retain its original lignin skeleton and could be used to produce NCQDs with excellent photoluminescence properties by one-pot hydrothermal treatment of AL and m-phenylenediamine. These NCQDs exhibited blue-green fluorescence (FL) with excitation/emission of 390/490 nm under optimal conditions. The NCQDs showed pH and excitation wavelength-dependent FL emission behaviors. On the basis of the exceptional selective response of these NCQDs to specific solvents, we developed a FL probe for the detection of formaldehyde (FA). The FL intensity of NCQDs was found to be directly proportional to the concentration of FA in the range of 0.05 to 2 mM (R2 = 0.993), with a detection limit of 4.64 µM (based on 3σ/K). A composite film comprising NCQDs with poly(vinyl alcohol) was found to act as a sensor with a good FL response to FA gas. When exposed to gaseous FA, this film exhibited increased FL intensity and transitioned from blue-green to blue. A mechanism is proposed in which the NCQDs react rapidly with FA to generate Schiff bases that result in enhanced FL emission and the observed blue shift in color. A hydrothermal method for synthesis of lignin-based N-doped carbon quantum dots (NCQDs) proposes a mechanism for rapid reaction of NCQDs with formaldehyde to generate Schiff bases, which leads to enhanced FL emission and the observed blue shift.![]()
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Affiliation(s)
- Ying Wang
- Key Laboratory of Bio-based Material Science &Technology, Northeast Forestry University, Ministry of Education Harbin 150040 P. R. China
| | - Yushan Liu
- Key Laboratory of Bio-based Material Science &Technology, Northeast Forestry University, Ministry of Education Harbin 150040 P. R. China
| | - Jin Zhou
- Key Laboratory of Bio-based Material Science &Technology, Northeast Forestry University, Ministry of Education Harbin 150040 P. R. China
| | - Jinquan Yue
- Key Laboratory of Bio-based Material Science &Technology, Northeast Forestry University, Ministry of Education Harbin 150040 P. R. China
| | - Mingcong Xu
- Key Laboratory of Bio-based Material Science &Technology, Northeast Forestry University, Ministry of Education Harbin 150040 P. R. China
| | - Bang An
- Key Laboratory of Bio-based Material Science &Technology, Northeast Forestry University, Ministry of Education Harbin 150040 P. R. China
| | - Chunhui Ma
- Key Laboratory of Bio-based Material Science &Technology, Northeast Forestry University, Ministry of Education Harbin 150040 P. R. China
| | - Wei Li
- Key Laboratory of Bio-based Material Science &Technology, Northeast Forestry University, Ministry of Education Harbin 150040 P. R. China
| | - Shouxin Liu
- Key Laboratory of Bio-based Material Science &Technology, Northeast Forestry University, Ministry of Education Harbin 150040 P. R. China
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Zhao S, Guo Y, Wang Q, An B. Antifungal effects of lycorine on Botrytis cinerea and possible mechanisms. Biotechnol Lett 2021; 43:1503-1512. [PMID: 33856593 DOI: 10.1007/s10529-021-03128-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Accepted: 04/08/2021] [Indexed: 12/31/2022]
Abstract
Botrytis cinerea cause postharvest diseases on fruit and lead economic losses. Application of environment-friendly natural compounds is an alternative for synthetic fungicides to control postharvest disease. Lycorine is an indolizidine alkaloid which is widely used for human drug design, however, application of lycorine in controlling postharvest disease and the underlying mechanisms have not been reported. In this study, the effects of lycorine on mycelium growth, spore germination, disease development in apple fruit, cell viability, cell membrane integrity, cell wall deposition, and expression of mitogen-activated protein kinase (MAPK) and GTPase of B. cinerea were investigated. Our results showed that lycorine was effective in controlling postharvest gray mold caused by B. cinerea on apple fruit. In the in vitro tests, lycorine strongly inhibited spore germination and mycelium spreading in culture medium. Investigation via fluorescein diacetate and propidium iodide staining suggested that lycorine could damage the membrane integrity and impair cell viability of B. cinerea. Furthermore, the expression levels of several MAPK and GTPase coding genes were reduced upon the lycorine treatment. Taken together, lycorine is an effective and promising way to control postharvest disease caused by B. cinerea.
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Affiliation(s)
- Shixue Zhao
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Tropical Crops, Hainan University, Haikou, 570228, China
| | - Yanhua Guo
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Tropical Crops, Hainan University, Haikou, 570228, China
| | - Qiannan Wang
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Tropical Crops, Hainan University, Haikou, 570228, China
| | - Bang An
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Tropical Crops, Hainan University, Haikou, 570228, China.
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Liang C, Zhang B, Zhou Y, Yin H, An B, Lin D, He C, Luo H. CgNPG1 as a Novel Pathogenic Gene of Colletotrichum gloeosporioides From Hevea brasiliensis in Mycelial Growth, Conidiation, and the Invasive Structures Development. Front Microbiol 2021; 12:629387. [PMID: 33763047 PMCID: PMC7982478 DOI: 10.3389/fmicb.2021.629387] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2020] [Accepted: 02/02/2021] [Indexed: 11/30/2022] Open
Abstract
The rubber tree (Hevea brasiliensis) is a tropical perennial crop for the primary source of natural rubber. Colletotrichum gloeosporioides from Hevea brasiliensis (C. gloeosporioides Hb) and Colletotrichum acutatum from Hevea brasiliensis (C. acutatum Hb) are the causal agents of rubber tree anthracnose and lead to serious loss of natural rubber production. Inoculation tests showed that C. gloeosporioides Hb possessed higher pathogenicity than C. acutatum Hb to the rubber tree. Genomic analysis revealed that an unknown gene, named CgNPG1 (a Novel Pathogenic Gene 1), was presented in the genome of C. gloeosporioides Hb but not identified in C. acutatum Hb. CgNPG1 was predicted to encode a small secretory protein without any conserved domain. To investigate the functions of CgNPG1 in C. gloeosporioides Hb and in C. acutatum Hb, the gene deletion and overexpression mutants were generated. The phenotype analysis showed that deletion of CgNPG1 led to changed conidia morphology, decreased mycelial growth, conidiation, conidia germination rate, appressorium formation rate, and pathogenicity of C. gloeosporioides Hb to the rubber tree. Meanwhile, heterogeneous expression of CgNPG1 in C. acutatum Hb significantly changed the conidia morphology and improved the mycelial growth rate, conidiation, conidia germination rate, appressorium formation rate, and the pathogenicity of C. acutatum Hb to the rubber tree. Consistently, CgNPG1 increased the expression level of CaCRZ1 and CaCMK1 in C. acutatum Hb. These data suggested that CgNPG1 contributed to mycelial growth, conidiation, the development of invasive structures, and the pathogenicity of Colletotrichum to the rubber tree, which might be related to the modulation of CaCRZ1 and mitogen-activated protein kinase CMK1. Our results provided new insight into CgNPG1 in regulating growth and pathogenicity of the Colletotrichum spp.
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Affiliation(s)
- Chen Liang
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, College of Tropical Crops, Hainan University, Haikou, China
| | - Bei Zhang
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, College of Tropical Crops, Hainan University, Haikou, China
| | - Yun Zhou
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, College of Tropical Crops, Hainan University, Haikou, China
| | - Hongyan Yin
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, College of Tropical Crops, Hainan University, Haikou, China
| | - Bang An
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, College of Tropical Crops, Hainan University, Haikou, China
| | - Daozhe Lin
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, College of Tropical Crops, Hainan University, Haikou, China
| | - Chaozu He
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, College of Tropical Crops, Hainan University, Haikou, China
| | - Hongli Luo
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, College of Tropical Crops, Hainan University, Haikou, China
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Li H, Kang A, An B, Chou LY, Shieh FK, Tsung CK, Zhong C. Encapsulation of bacterial cells in cytoprotective ZIF-90 crystals as living composites. Mater Today Bio 2021; 10:100097. [PMID: 33733083 PMCID: PMC7937694 DOI: 10.1016/j.mtbio.2021.100097] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Revised: 01/19/2021] [Accepted: 01/20/2021] [Indexed: 12/19/2022] Open
Abstract
Exploiting metal-organic frameworks (MOFs) as selectively permeable shelters for encapsulating engineered cells to form hybrid living materials has attracted increasing attention in recent years. Optimizing the synthesis process to improve encapsulation efficiency (EE) is critical for further technological development and applications. Here, using ZIF-90 and genetically engineered Escherichia coli (E. coli) as a demo, we fabricated E. coli@ZIF-90 living composites in which E. coli cells were encapsulated in ZIF-90 crystals. We illustrated that ZIF-90 could serve as a protective porous cage for cells to shield against toxic bactericides including benzaldehyde, cinnamaldehyde, and kanamycin. Notably, the E. coli cells remained alive and could self-reproduce after removing the ZIF-90 crystal cages in ethylenediaminetetraacetic acid, suggesting a feasible route for protecting and prolonging the lifespan of bacterial cells. Moreover, an aqueous multiple-step deposition approach was developed to improve EE of the E. coli@ZIF-90 composites: the EE increased to 61.9 ± 5.2%, in contrast with the efficiency of the traditional method (21.3 ± 4.4%) prepared with PBS buffer. In short, we develop a simple yet viable strategy to manufacture MOF-based living hybrid materials that promise new applications across diverse fields.
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Affiliation(s)
- H. Li
- Materials and Physical Biology Division, School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - A. Kang
- Materials and Physical Biology Division, School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - B. An
- Materials and Physical Biology Division, School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - L.-Y. Chou
- Materials and Physical Biology Division, School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - F.-K. Shieh
- Department of Chemistry, National Central University, Taoyuan 32001, Taiwan
| | - C.-K. Tsung
- Boston College Chemistry Department, Merkert Chemistry Center, 2609 Beacon St, Chestnut Hill, MA 02467, USA
| | - C. Zhong
- Materials and Physical Biology Division, School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
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Yang J, Wang Q, Luo H, He C, An B. HbWRKY40 plays an important role in the regulation of pathogen resistance in Hevea brasiliensis. Plant Cell Rep 2020; 39:1095-1107. [PMID: 32399673 DOI: 10.1007/s00299-020-02551-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2019] [Accepted: 05/02/2020] [Indexed: 05/22/2023]
Abstract
KEY MESSAGE Overexpression of HbWRKY40 induces ROS burst in tobacco and increases disease resistance in Arabidopsis; RNA-seq and ChIP assays revealed the regulatory network of HbWRKY40 in plant defense. WRKY, a family of plant transcription factors, are involved in the regulation of numerous biological processes. In rubber tree Hevea brasiliensis, the roles of WRKYs remain poorly understood. In the present study, a total of 111 genes encoding putative HbWRKY proteins were identified in the H. brasiliensis genome. Among these genes, HbWRKY40 transcripts were significantly induced by Colletotrichum gloeosporioides and salicylic acid. To assess its roles in plant defense, HbWRKY40 was over-expressed in Nicotiana benthamiana and Arabidopsis thaliana. The results showed that HbWRKY40 significantly induced reactive oxygen species burst in N. benthamiana and increased resistance of Arabidopsis against Botrytis cinerea. Transient expression in mesophyll cell protoplasts of H. brasiliensis showed that HbWRKY40 localizes at nuclei. In addition, transcripts of 145 genes were significantly up-regulated and 6 genes were down-regulated in the protoplasts over-expressing HbWRKY40 based on the RNA-seq analysis. Among these potential downstream targets, 12 genes contain potential WRKY-binding sites at the promoter regions. Further analysis through chromatin immunoprecipitation revealed that 10 of these 12 genes were the downstream targets of HbWRKY40. Taken together, our findings indicate that HbWRKY40 plays an important role in the disease resistance by regulating defense-associated genes in H. brasiliensis.
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Affiliation(s)
- Jie Yang
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, College of Tropical Crops, Hainan University, Haikou, 570228, Hainan, People's Republic of China
| | - Qiannan Wang
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, College of Tropical Crops, Hainan University, Haikou, 570228, Hainan, People's Republic of China
| | - Hongli Luo
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, College of Tropical Crops, Hainan University, Haikou, 570228, Hainan, People's Republic of China
| | - Chaozu He
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, College of Tropical Crops, Hainan University, Haikou, 570228, Hainan, People's Republic of China
| | - Bang An
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, College of Tropical Crops, Hainan University, Haikou, 570228, Hainan, People's Republic of China.
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Zhao S, An B, Guo Y, Hou X, Luo H, He C, Wang Q. Label free proteomics and systematic analysis of secretome reveals effector candidates regulated by SGE1 and FTF1 in the plant pathogen Fusarium oxysporum f. sp. cubense tropical race 4. BMC Genomics 2020; 21:275. [PMID: 32245409 PMCID: PMC7119298 DOI: 10.1186/s12864-020-6695-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Accepted: 03/24/2020] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Phytopathogens secreted effectors during host colonization to suppress or trigger plant immunity. Identification of new effectors is one of the research focuses in recent years. There is only a limited knowledge about effectors of Fusarium oxysporum f. sp. Cubense tropical race 4 (Foc TR4), the causal agent of wilt disease in Cavendish banana. RESULTS Two transcription factors, SGE1 and FTF1, were constitutively over-expressed in Foc TR4 to partially mimic the in-planta state. Secreted proteins with high purity were prepared through a two-round extraction method. Then the secretome were analyzed via label free proteomics method. A total of 919 non-redundant proteins were detected, of which 74 proteins were predicted to be effector candidates. Among these candidates, 29 were up-regulated and 13 down-regulated in the strain over-expressing SGE1 and FTF1, 8 were up-regulated and 4 down-regulated in either SGE1 or FTF1 over expression strain. CONCLUSIONS Through label free proteomics analysis, a series of effector candidates were identified in secretome of Foc TR4. Our work put a foundation for functional research of these effectors.
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Affiliation(s)
- Shixue Zhao
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, College of Tropical Crops, Hainan University, Haikou, Hainan, 570228, People's Republic of China
| | - Bang An
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, College of Tropical Crops, Hainan University, Haikou, Hainan, 570228, People's Republic of China
| | - Yanhua Guo
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, College of Tropical Crops, Hainan University, Haikou, Hainan, 570228, People's Republic of China
| | - Xingrong Hou
- College of Fisheries and Life Science, Hainan Tropical Ocean University, Sanya, Hainan, 572022, People's Republic of China
| | - Hongli Luo
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, College of Tropical Crops, Hainan University, Haikou, Hainan, 570228, People's Republic of China
| | - Chaozu He
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, College of Tropical Crops, Hainan University, Haikou, Hainan, 570228, People's Republic of China
| | - Qiannan Wang
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, College of Tropical Crops, Hainan University, Haikou, Hainan, 570228, People's Republic of China.
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Shen C, Bian L, Zhang P, An B, Cui Z, Wang H, Li J. Microstructure evolution of bonded water layer and morphology of grafting membrane with different polyethylene glycol length and their influence on permeability and anti-fouling capacity. J Memb Sci 2020. [DOI: 10.1016/j.memsci.2020.117949] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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Liu X, Xu M, An B, Wu Z, Yang R, Ma C, Huang Q, Li W, Li J, Liu S. A facile hydrothermal method-fabricated robust and ultralight weight cellulose nanocrystal-based hydro/aerogels for metal ion removal. Environ Sci Pollut Res Int 2019; 26:25583-25595. [PMID: 31267405 DOI: 10.1007/s11356-019-05810-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2019] [Accepted: 06/20/2019] [Indexed: 06/09/2023]
Abstract
Heavy metal ion contamination, in particular that associated with Pb2+, Cd2+, and Cu2+, poses a considerable threat to aquatic environments and human health. To obtain a highly efficient adsorbent, in this work, a facile hydrothermal method was applied to prepare acrylic acid grafted onto cellulose nanocrystal (AA-g-CNC) hydro/aerogel as an adsorbent for Pb2+, Cd2+, and Cu2+ removal. The obtained AA-g-CNC hydrogels withstood up to 0.821 MPa of compression and showed good reciprocating performance when the deformation reached 40%. The as-formed AA-g-CNC aerogels had highly porous honeycomb structure, with many functional groups and a high zeta potential, all of which are essential features for an effective adsorbent. The maximum Pb2+, Cd2+, and Cu2+ removal capacities of AA-g-CNC aerogels reached 1026, 898.8, and 872.4 mg/g respectively. Their adsorption followed the Freundlich isotherm model and fitted well with pseudo-second-order kinetic models. The adsorption mechanism mainly attributed to electrostatic chelation between metal ions with sulfonate and carboxylate groups.
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Affiliation(s)
- Xuehua Liu
- Key laboratory of Bio-Based Material Science and Technology, Ministry of Education, Northeast Forestry University, Harbin, 150040, People's Republic of China
| | - Mingcong Xu
- Key laboratory of Bio-Based Material Science and Technology, Ministry of Education, Northeast Forestry University, Harbin, 150040, People's Republic of China
| | - Bang An
- Key laboratory of Bio-Based Material Science and Technology, Ministry of Education, Northeast Forestry University, Harbin, 150040, People's Republic of China
| | - Zhenwei Wu
- Key laboratory of Bio-Based Material Science and Technology, Ministry of Education, Northeast Forestry University, Harbin, 150040, People's Republic of China
| | - Rue Yang
- Post-Doctoral Research Center, Yihua Lifestyle Technology Co., Ltd., Shantou, 515834, People's Republic of China
| | - Chunhui Ma
- Key laboratory of Bio-Based Material Science and Technology, Ministry of Education, Northeast Forestry University, Harbin, 150040, People's Republic of China
| | - Qiongtao Huang
- Post-Doctoral Research Center, Yihua Lifestyle Technology Co., Ltd., Shantou, 515834, People's Republic of China
| | - Wei Li
- Key laboratory of Bio-Based Material Science and Technology, Ministry of Education, Northeast Forestry University, Harbin, 150040, People's Republic of China.
- Post-Doctoral Research Center, Yihua Lifestyle Technology Co., Ltd., Shantou, 515834, People's Republic of China.
| | - Jian Li
- Key laboratory of Bio-Based Material Science and Technology, Ministry of Education, Northeast Forestry University, Harbin, 150040, People's Republic of China
| | - Shouxin Liu
- Key laboratory of Bio-Based Material Science and Technology, Ministry of Education, Northeast Forestry University, Harbin, 150040, People's Republic of China.
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An B, Xia J, Chang T, Wang X, Xu L, Zhang L, Gao X, Chen Y, Li J, Gao H. Genome-wide association study reveals candidate genes associated with body measurement traits in Chinese Wagyu beef cattle. Anim Genet 2019; 50:386-390. [PMID: 31179577 DOI: 10.1111/age.12805] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/19/2019] [Indexed: 01/08/2023]
Abstract
We performed a genome-wide association study to identify candidate genes for body measurement traits in 463 Wagyu beef cattle typed with the Illumina Bovine HD 770K SNP array. At the genome-wide level, we detected 18, five and one SNPs associated with hip height, body height and body length respectively. In total, these SNPs are within or near 11 genes, six of which (PENK, XKR4, IMPAD1, PLAG1, CCND2 and SNTG1) have been reported previously and five of which (CSMD3, LAP3, SYN3, FAM19A5 and TIMP3) are novel candidate genes that we found to be associated with body measurement traits. Further exploration of these candidate genes will facilitate genetic improvement in Chinese Wagyu beef cattle.
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Affiliation(s)
- B An
- Institute of Animal Science, Chinese Academy of Agricultural Science, Beijing, 100193, China
| | - J Xia
- Institute of Basic Medical Science, Westlake Institute for Advanced Study, Hangzhou, 310000, China
| | - T Chang
- Institute of Animal Science, Chinese Academy of Agricultural Science, Beijing, 100193, China
| | - X Wang
- Institute of Animal Science, Chinese Academy of Agricultural Science, Beijing, 100193, China
| | - L Xu
- Institute of Animal Science, Chinese Academy of Agricultural Science, Beijing, 100193, China
| | - L Zhang
- Institute of Animal Science, Chinese Academy of Agricultural Science, Beijing, 100193, China
| | - X Gao
- Institute of Animal Science, Chinese Academy of Agricultural Science, Beijing, 100193, China
| | - Y Chen
- Institute of Animal Science, Chinese Academy of Agricultural Science, Beijing, 100193, China
| | - J Li
- Institute of Animal Science, Chinese Academy of Agricultural Science, Beijing, 100193, China
| | - H Gao
- Institute of Animal Science, Chinese Academy of Agricultural Science, Beijing, 100193, China
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An B, Hou X, Guo Y, Zhao S, Luo H, He C, Wang Q. The effector SIX8 is required for virulence of Fusarium oxysporum f.sp. cubense tropical race 4 to Cavendish banana. Fungal Biol 2019; 123:423-430. [DOI: 10.1016/j.funbio.2019.03.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Revised: 03/03/2019] [Accepted: 03/05/2019] [Indexed: 01/10/2023]
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Li X, An B, Ma J, He B, Qi J, Wang W, Qin C, Zhao Q. Prognostic Value of the Tumor Size in Resectable Colorectal Cancer with Different Primary Locations: A Retrospective Study with the Propensity Score Matching. J Cancer 2019; 10:313-322. [PMID: 30719125 PMCID: PMC6360316 DOI: 10.7150/jca.26882] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Accepted: 10/03/2018] [Indexed: 02/06/2023] Open
Abstract
Objective: To investigate the prognostic value of the tumor size in colorectal cancer (CRC) patients with different primary tumor locations. Patients and methods: We retrospectively recruited 3971 stage I-III CRC patients with curative resection. The propensity score matching technique was conducted to reduce the selection bias, producing a propensity score matched cohort of 1347 pairs of patients based on the tumor size (≤4 cm and >4 cm groups). Kaplan-Meier survival analyses and univariate and multivariate analyses were used to compare the overall survival (OS), cancer-specific survival (CSS) and disease-free survival (DFS) between the two groups. Subgroup analyses which were stratified by primary tumor locations and several other baseline variables were also performed for conformation. Results: In the propensity score matched cohort, the Kaplan-Meier survival curves revealed that patients with a tumor size less than 4 cm had similar OS, CSS and DFS, compared to patients with a tumor size greater than 4 cm. While in multivariate analyses, the smaller tumor size was an independent risk factor for CSS (HR, 1.275; 95% CI, 1.006-1.616; P=0.045). Subgroup analyses based on primary tumor locations further suggested that the smaller tumor size was significantly associated with worse OS (HR, 2.455; 95% CI, 1.297-4.649; P=0.006) and CSS (HR, 2.493; 95% CI, 1.202-5.174; P=0.014) in patients with right-side colon cancers (RCC). Conclusions: Our propensity matching score study indicated that the smaller tumor size was an independent risk factor for CSS in patients with stage I-III CRC, and for OS and CSS in patients with RCC.
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Affiliation(s)
- Xiao Li
- Department of Gastroenterology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan 250021, Shandong Province, China.,Shandong Provincial Engineering and Technological Research Center for Liver Diseases Prevention and Control, Jinan 250021, Shandong Province, China
| | - Bang An
- Department of Cardiology, Central Hospital of Zibo, Zibo 255036, Shandong Province, China
| | - Jincai Ma
- Department of Gastroenterology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan 250021, Shandong Province, China.,Department of Gastroenterology, The Fifth People's Hospital of Jinan, Jinan 250022, Shandong Province, China
| | - Bo He
- Department of Gastroenterology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan 250021, Shandong Province, China.,Shandong Provincial Engineering and Technological Research Center for Liver Diseases Prevention and Control, Jinan 250021, Shandong Province, China
| | - Jianni Qi
- Shandong Provincial Engineering and Technological Research Center for Liver Diseases Prevention and Control, Jinan 250021, Shandong Province, China.,Central Laboratory, Shandong Provincial Hospital Affiliated to Shandong University, Jinan 250021, Shandong Province, China
| | - Wenwen Wang
- Department of Gastroenterology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan 250021, Shandong Province, China.,Shandong Provincial Engineering and Technological Research Center for Liver Diseases Prevention and Control, Jinan 250021, Shandong Province, China
| | - Chengyong Qin
- Department of Gastroenterology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan 250021, Shandong Province, China.,Shandong Provincial Engineering and Technological Research Center for Liver Diseases Prevention and Control, Jinan 250021, Shandong Province, China.,Health Commission of Shandong Province, Jinan 250014, Shandong Province, China
| | - Qi Zhao
- Department of Gastroenterology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan 250021, Shandong Province, China.,Shandong Provincial Engineering and Technological Research Center for Liver Diseases Prevention and Control, Jinan 250021, Shandong Province, China
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Li X, An B, Zhao Q, Qi J, Wang W, Zhang D, Li Z, Qin C. Combined fibrinogen and neutrophil-lymphocyte ratio as a predictive factor in resectable colorectal adenocarcinoma. Cancer Manag Res 2018; 10:6285-6294. [PMID: 30568490 PMCID: PMC6267773 DOI: 10.2147/cmar.s161094] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Purpose The aim of this study was to investigate the clinical significance of the combined fibrinogen and neutrophil–lymphocyte ratio (F-NLR) in patients with resectable colorectal cancer (CRC). Patients and methods We retrospectively recruited 693 patients with stage I–III CRC following curative surgery. Cutoff values of the preoperative fibrinogen and neutrophil–lymphocyte ratio (NLR) were determined with the receiver operating characteristic analysis. Patients were divided into three groups based on the F-NLR value and were further divided into the chemotherapy and nonchemotherapy groups. The overall survival (OS) and disease-free survival (DFS) were evaluated with the Kaplan–Meier survival method, the log-rank test, univariate and multivariate Cox proportional hazards models, and subgroup analyses. Results The Kaplan–Meier survival curves revealed that the 5-year OS rates in the F-NLR 0, 1, and 2 groups were 78.4%, 52%, 42.6%, respectively (P<0.001), and the 5-year DFS rates were 54.9%, 43.9%, 26.7%, respectively (P<0.001). Multivariate analyses revealed that the F-NLR score was an independent prognostic factor for both the OS (P=0.035) and the DFS (P=0.001). In addition, subgroup analyses based on the histological type showed that an elevated F-NLR score was significantly associated with worse OS (P=0.001) and DFS (P<0.001) in patients with colorectal adenocarcinoma. Furthermore, DFS in the F-NLR 0–1 group was significantly shortened after the administration of chemotherapy (P=0.005); however, patients with a relatively higher F-NLR score showed slight OS benefit from adjuvant chemotherapy (P=0.144). Conclusion The F-NLR score, as a novel inflammation-based grading index, was a potential predictor for the prognosis and responses to chemotherapy in patients with resectable CRC.
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Affiliation(s)
- Xiao Li
- Department of Gastroenterology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan 250021, Shandong, China, .,Shandong Provincial Engineering and Technological Research Center for Liver Diseases Prevention and Control, Jinan 250021, Shandong, China,
| | - Bang An
- Department of Cardiology, Central Hospital of Zibo, Zibo 255036, Shandong, China,
| | - Qi Zhao
- Department of Gastroenterology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan 250021, Shandong, China, .,Shandong Provincial Engineering and Technological Research Center for Liver Diseases Prevention and Control, Jinan 250021, Shandong, China,
| | - Jianni Qi
- Shandong Provincial Engineering and Technological Research Center for Liver Diseases Prevention and Control, Jinan 250021, Shandong, China, .,Central Laboratory, Shandong Provincial Hospital Affiliated to Shandong University, Jinan 250021, Shandong, China
| | - Wenwen Wang
- Department of Gastroenterology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan 250021, Shandong, China, .,Shandong Provincial Engineering and Technological Research Center for Liver Diseases Prevention and Control, Jinan 250021, Shandong, China,
| | - Di Zhang
- Department of Gastroenterology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan 250021, Shandong, China, .,Shandong Provincial Engineering and Technological Research Center for Liver Diseases Prevention and Control, Jinan 250021, Shandong, China,
| | - Zhen Li
- Department of Gastroenterology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan 250021, Shandong, China, .,Shandong Provincial Engineering and Technological Research Center for Liver Diseases Prevention and Control, Jinan 250021, Shandong, China,
| | - Chengyong Qin
- Department of Gastroenterology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan 250021, Shandong, China, .,Shandong Provincial Engineering and Technological Research Center for Liver Diseases Prevention and Control, Jinan 250021, Shandong, China, .,Health Commission of Shandong Province, Jinan 250021, Shandong, China
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Wang W, An B, Feng L, He C, Luo H. A Colletotrichum gloeosporioides cerato-platanin protein, CgCP1, contributes to conidiation and plays roles in the interaction with rubber tree. Can J Microbiol 2018; 64:826-834. [DOI: 10.1139/cjm-2018-0087] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Colletotrichum gloeosporioides is the causal agent of rubber tree anthracnose and leads to serious losses of natural rubber production. The pathogenesis of C. gloeosporioides on rubber tree remains unknown. Cerato-platanin proteins are small, secreted cysteine-rich proteins that contribute to virulence and function in plant–fungal interactions. A gene encoding cerato-platanin protein, CgCP1, was identified in C. gloeosporioides. In silico analysis indicated that CgCP1 belongs to a new branch of the cerato-platanin protein family. The CgCP1 knockout mutants (ΔCgCP1) and complementary strain (Res-ΔCgCP1) were generated to investigate its biological function. The results showed that the speed of growth of aerial hyphae was not significantly different among the wild-type (WT), ΔCgCP1, and Res-ΔCgCP1 strains, but conidiation of ΔCgCP1 significantly decreased in comparison with the WT. The pathogenicity test proved that the severity of symptoms caused by ΔCgCP1 was reduced significantly compared with those caused by the Res-ΔCgCP1 and WT strains. Additionally, CgCP1 induced necrosis-like cell death on tobacco leaf and accumulation of reactive oxygen species in rubber tree mesophyll protoplasts. Altogether, these data indicate the involvement of C. gloeosporioides CgCP1 in conidiation and the interaction with rubber tree.
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Affiliation(s)
- Wenfeng Wang
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, Hainan University, 58 Renming Road, Haikou, Hainan 570228, China
- Institute of Tropical Agriculture and Forestry, Hainan University, Haikou, 570228, China
| | - Bang An
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, Hainan University, 58 Renming Road, Haikou, Hainan 570228, China
- Institute of Tropical Agriculture and Forestry, Hainan University, Haikou, 570228, China
| | - Liping Feng
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, Hainan University, 58 Renming Road, Haikou, Hainan 570228, China
- Institute of Tropical Agriculture and Forestry, Hainan University, Haikou, 570228, China
| | - Chaozu He
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, Hainan University, 58 Renming Road, Haikou, Hainan 570228, China
- Institute of Tropical Agriculture and Forestry, Hainan University, Haikou, 570228, China
| | - Hongli Luo
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, Hainan University, 58 Renming Road, Haikou, Hainan 570228, China
- Institute of Tropical Agriculture and Forestry, Hainan University, Haikou, 570228, China
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Li X, Zhao Q, An B, Qi J, Wang W, Zhang D, Li Z, Qin C. Prognostic and predictive value of the macroscopic growth pattern in patients undergoing curative resection of colorectal cancer: a single-institution retrospective cohort study of 4,080 Chinese patients. Cancer Manag Res 2018; 10:1875-1887. [PMID: 30013394 PMCID: PMC6037271 DOI: 10.2147/cmar.s165279] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Purpose The purpose of this study was to determine whether macroscopic growth patterns had an impact on the prognosis of colorectal cancer (CRC) patients with different tumor–node–metastasis (TNM) stages and responses to chemotherapy in stage III patients. Patients and methods We retrospectively recruited 4,080 stage I–III CRC patients who underwent curative resection at Shandong Provincial Hospital affiliated to Shandong University. All patients were grouped by macroscopic growth patterns (expansive, infiltrative and ulcerative subtypes), and stage III patients were further divided into chemotherapy and nonchemotherapy groups. Kaplan–Meier methods, univariate and multivariate analyses and subset analyses were performed to assess the overall survival (OS), cancer-specific survival (CSS) and disease-free survival (DFS). Results Kaplan–Meier survival curves and univariate analyses revealed better OS (HR=0.731; 95% CI=0.584–0.916), CSS (HR=0.714; 95% CI=0.548–0.932) and DFS (HR=0.722; 95% CI=0.602–0.864) in the expansive subtype and worse OS (HR=2.121; 95% CI=1.457–3.088), CSS (HR=2.499; 95% CI=1.664–3.753) and DFS (HR=2.360; 95% CI=1.756–3.170) in the infiltrative subtype. Subset analyses based on the tumor–node–metastasis stage showed that the infiltrative subtype was associated with inferior DFS in stage II (HR=2.357; 95% CI=1.210–4.595) and stage III patients (HR=1.941; 95% CI=1.394–2.702) and inferior OS and CSS in stage III patients (HR=1.805; 95% CI=1.210–2.693 and HR=1.981, 95% CI=1.280–3.065, respectively). In addition, multivariate Cox proportional hazard regression models revealed similar results. Furthermore, in stage III patients, the OS, CSS and DFS in both the expansive and ulcerative subtypes were significantly extended after the administration of chemotherapy (all, P<0.001). However, the OS, CSS and DFS in the infiltrative subtype did not change significantly after the administration of chemotherapy (P=0.486, 0.290 and 0.731, respectively). Conclusion The macroscopic growth pattern was an independent prognostic factor among stage I–III CRC patients. The infiltrative subtype had the worst prognosis in stage III patients and did not display survival benefits from chemotherapy.
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Affiliation(s)
- Xiao Li
- Department of Gastroenterology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan 250021, Shandong Province, People's Republic of China, .,Shandong Provincial Engineering and Technological Research Center for Liver Diseases Prevention and Control, Jinan 250021, Shandong Province, People's Republic of China,
| | - Qi Zhao
- Department of Gastroenterology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan 250021, Shandong Province, People's Republic of China, .,Shandong Provincial Engineering and Technological Research Center for Liver Diseases Prevention and Control, Jinan 250021, Shandong Province, People's Republic of China,
| | - Bang An
- Department of Cardiology, Central Hospital of Zibo, Zibo, People's Republic of China
| | - Jianni Qi
- Shandong Provincial Engineering and Technological Research Center for Liver Diseases Prevention and Control, Jinan 250021, Shandong Province, People's Republic of China, .,Central Laboratory, Shandong Provincial Hospital Affiliated to Shandong University, Jinan 250021, Shandong Province, People's Republic of China
| | - Wenwen Wang
- Department of Gastroenterology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan 250021, Shandong Province, People's Republic of China, .,Shandong Provincial Engineering and Technological Research Center for Liver Diseases Prevention and Control, Jinan 250021, Shandong Province, People's Republic of China,
| | - Di Zhang
- Department of Gastroenterology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan 250021, Shandong Province, People's Republic of China, .,Shandong Provincial Engineering and Technological Research Center for Liver Diseases Prevention and Control, Jinan 250021, Shandong Province, People's Republic of China,
| | - Zhen Li
- Department of Gastroenterology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan 250021, Shandong Province, People's Republic of China, .,Shandong Provincial Engineering and Technological Research Center for Liver Diseases Prevention and Control, Jinan 250021, Shandong Province, People's Republic of China,
| | - Chengyong Qin
- Department of Gastroenterology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan 250021, Shandong Province, People's Republic of China, .,Shandong Provincial Engineering and Technological Research Center for Liver Diseases Prevention and Control, Jinan 250021, Shandong Province, People's Republic of China,
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Li X, An B, Zhao Q, Qi J, Wang W, Zhang D, Li Z, Qin C. Impact of tumor deposits on the prognosis and chemotherapy efficacy in stage III colorectal cancer patients with different lymph node status: A retrospective cohort study in China. Int J Surg 2018; 56:188-194. [PMID: 29936197 DOI: 10.1016/j.ijsu.2018.06.029] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Revised: 06/14/2018] [Accepted: 06/19/2018] [Indexed: 12/29/2022]
Abstract
BACKGROUND The goal was to determine whether tumor deposits (TDs) had effects on the overall survival (OS), cancer-specific survival (CSS), disease-free survival (DFS) and responses to chemotherapy in advanced colorectal cancer (CRC) patients with different lymph node (N) stages. MATERIALS AND METHODS The retrospective cohort study recruited 1455 stage III CRC patients diagnosed at a single institution between January 2010 and July 2016. Patients were divided into TDs negative and positive groups. Based on whether they accepted chemotherapy, patients were further divided into chemotherapy and non-chemotherapy groups. Kaplan-Meier methods, univariate and multivariate analyses, and subset analyses based on the N stage were performed to compare the OS, CSS and DFS between different groups. RESULTS Multivariate Cox analyses showed that TDs were independent prognostic markers for the OS (adjusted HR = 1.929, 95% CI: 1.339-2.777), CSS (adjusted HR = 1.789, 95% CI: 1.165-2.748) and DFS (adjusted HR = 2.179, 95% CI: 1.612-2.944) in all N stages combined. In addition, subset analyses based on the N stage further demonstrated that TDs were independent risk factors for the OS (P = 0.012), CSS (P = 0.010) and DFS (P < 0.001) in patients with the N1a, 1 b stages, and for the OS (P = 0.023) and DFS (P < 0.001) in patients with the N2a, 2 b stages. Furthermore, the OS, CSS and DFS in the TDs negative group could be extended significantly after the administration of chemotherapy, whereas patients with positive TDs lost the DFS benefit from chemotherapy. CONCLUSIONS Stage III CRC patients with positive TDs had a poor prognosis, and they did not display a DFS benefit from chemotherapy. TDs had adverse effects on the OS and DFS in patients with the N1a, 1 b and N2a, 2 b stages, providing evidence for the feasibility of the new TNM category method.
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Affiliation(s)
- Xiao Li
- Department of Gastroenterology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, 250021, China; Shandong Provincial Engineering and Technological Research Center for Liver Diseases Prevention and Control, Jinan, 250021, China
| | - Bang An
- Department of Cardiology, Central Hospital of Zibo, Zibo, 255036, China
| | - Qi Zhao
- Department of Gastroenterology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, 250021, China; Shandong Provincial Engineering and Technological Research Center for Liver Diseases Prevention and Control, Jinan, 250021, China
| | - Jianni Qi
- Central Laboratory, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, 250021, China; Shandong Provincial Engineering and Technological Research Center for Liver Diseases Prevention and Control, Jinan, 250021, China
| | - Wenwen Wang
- Department of Gastroenterology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, 250021, China; Shandong Provincial Engineering and Technological Research Center for Liver Diseases Prevention and Control, Jinan, 250021, China
| | - Di Zhang
- Department of Gastroenterology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, 250021, China; Shandong Provincial Engineering and Technological Research Center for Liver Diseases Prevention and Control, Jinan, 250021, China
| | - Zhen Li
- Department of Gastroenterology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, 250021, China; Shandong Provincial Engineering and Technological Research Center for Liver Diseases Prevention and Control, Jinan, 250021, China
| | - Chengyong Qin
- Department of Gastroenterology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, 250021, China; Shandong Provincial Engineering and Technological Research Center for Liver Diseases Prevention and Control, Jinan, 250021, China.
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Abstract
The ascomycete fungus Fusarium oxysporum f.sp. cubense race 4 (Foc TR4) causes vascular wilt diseases in banana (Musa spp.). In the present study, the role of SGE1 in regulating growth, conidiation, and pathogenicity of Foc TR4 was investigated. Deletion of SGE1 did not influence vegetative growth but impaired the conidiation of Foc TR4. Besides, the SGE1 deletion mutant basically lost pathogenicity on banana plantlets. Observation under the microscope indicated that the penetration and colonization processes were severely impaired in the SGE1 deletion mutant. Proteomics analysis suggested that SGE1 regulated the production of a series of proteins of Foc TR4. Taken together, our results suggest that SGE1 plays an important role in regulating conidiation and pathogenicity in fungal pathogen Foc TR4.
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Affiliation(s)
- Xingrong Hou
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Biology, Institute of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, People's Republic of China.,Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Biology, Institute of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, People's Republic of China
| | - Bang An
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Biology, Institute of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, People's Republic of China.,Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Biology, Institute of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, People's Republic of China
| | - Qiannan Wang
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Biology, Institute of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, People's Republic of China.,Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Biology, Institute of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, People's Republic of China
| | - Yunfeng Guo
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Biology, Institute of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, People's Republic of China.,Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Biology, Institute of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, People's Republic of China
| | - Hongli Luo
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Biology, Institute of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, People's Republic of China.,Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Biology, Institute of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, People's Republic of China
| | - Chaozu He
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Biology, Institute of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, People's Republic of China.,Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Biology, Institute of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, People's Republic of China
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An B, Yin F, de Voogd NJ, Chen X, Cheng W, Lin W. Chagosendines A - C, New Metal Complexes of Imidazole Alkaloids from the Calcareous Sponge Leucetta chagosensis. Chem Biodivers 2018; 15. [PMID: 29194948 DOI: 10.1002/cbdv.201700481] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2017] [Accepted: 11/27/2017] [Indexed: 11/10/2022]
Abstract
Chemical examination of the bright yellow sponge Leucetta chagosensis resulted in the isolation of three new imidazole-based alkaloid complexes namely chagosendines A - C (1 - 3), together with known analogues pyronaamidine, naamidine J, and naamine C. Their structures were determined on the basis of extensive spectroscopic (IR, MS, NMR, and single-crystal X-ray diffraction) analysis in association with the chemical conversion. The isolated alkaloids together with three synthesized new homodimer complexes were evaluated for the cytotoxic activities against a panel of tumor cell lines. The copper complexes of imidazole alkaloids 2 and 3, as found from nature for the first time, exerted selective and remarkable activities against the tumor cell lines K562, HepG2, and HeLa.
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Affiliation(s)
- Bang An
- State Key Laboratory of Natural and Biomimetic Drugs, Peking University, Beijing, 100191, P. R. China
| | - Fuling Yin
- State Key Laboratory of Natural and Biomimetic Drugs, Peking University, Beijing, 100191, P. R. China
| | - Nicole J de Voogd
- Netherlands Centre for Biodiversity Naturalis, P.O. Box 9517, Leiden, 2300 RA Leiden, The Netherlands
| | - Xiaoguang Chen
- Institute of Materia Medica, Chinese Academy of Medical Sciences, Beijing, 100050, P. R. China
| | - Wei Cheng
- State Key Laboratory of Natural and Biomimetic Drugs, Peking University, Beijing, 100191, P. R. China
| | - Wenhan Lin
- State Key Laboratory of Natural and Biomimetic Drugs, Peking University, Beijing, 100191, P. R. China
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Wang Q, An B, Hou X, Guo Y, Luo H, He C. Dicer-like Proteins Regulate the Growth, Conidiation, and Pathogenicity of Colletotrichum gloeosporioides from Hevea brasiliensis. Front Microbiol 2018; 8:2621. [PMID: 29403443 PMCID: PMC5777394 DOI: 10.3389/fmicb.2017.02621] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Accepted: 12/15/2017] [Indexed: 11/17/2022] Open
Abstract
Colletotrichum gloeosporioides from Hevea brasiliensis is the hemibiotrophic fungi which could cause anthracnose in rubber trees. Dicer like proteins (DCL) were the core enzymes for generation of small RNAs. In the present study, the knocking-out mutants of two dicer like proteins encoding genes of C. gloeosporioides were constructed; and functions of two proteins were investigated. The results showed that DCL play important roles in regulating the growth, conidiation and pathogenicity of C. gloeosporioides; and there is a functional redundancy between DCL1 and DCL2. Microscopy analysis and DAB staining revealed that loss of penetration ability into the host cells, instead of the decreased growth rate, was the main cause for the impaired pathogenicity of the ΔDcl1ΔDcl2 double mutant. Proteomics analysis suggested that DCL proteins affected the expression of functional proteins to regulating multiple biological processes of C. gloeosporioides. These data lead to a better understanding of the functions of DCL proteins in regulating the development and pathogenesis of C. gloeosporioides.
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Affiliation(s)
- Qiannan Wang
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources and College of Biology, Institute of Tropical Agriculture and Forestry, Hainan University, Haikou, China
| | - Bang An
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources and College of Biology, Institute of Tropical Agriculture and Forestry, Hainan University, Haikou, China
| | - Xingrong Hou
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources and College of Biology, Institute of Tropical Agriculture and Forestry, Hainan University, Haikou, China
| | - Yunfeng Guo
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources and College of Biology, Institute of Tropical Agriculture and Forestry, Hainan University, Haikou, China
| | - Hongli Luo
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources and College of Biology, Institute of Tropical Agriculture and Forestry, Hainan University, Haikou, China
| | - Chaozu He
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources and College of Biology, Institute of Tropical Agriculture and Forestry, Hainan University, Haikou, China
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Sun J, Wu J, An B, Voogd NJD, Cheng W, Lin W. Bromopyrrole Alkaloids with the Inhibitory Effects against the Biofilm Formation of Gram Negative Bacteria. Mar Drugs 2018; 16:md16010009. [PMID: 29301295 PMCID: PMC5793057 DOI: 10.3390/md16010009] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2017] [Revised: 11/27/2017] [Accepted: 12/11/2017] [Indexed: 11/16/2022] Open
Abstract
Anti-biofilm assay guided fractionation of the marine sponge Stylissa massa revealed the butanol soluble fraction that was possessing the inhibitory activity toward the biofilm formation of bacterium E. coli. Chromatographic separation of the bioactive fraction resulted in the isolation of 32 bromopyrrole alkaloids, including six new alkaloids, named stylisines A-F (1-6). The structures of new alkaloids were established by comprehensive analyses of the two-dimensional (2D) NMR (COSY, HMQC, and HMBC) and the high resolution electrospray ionization mass spectroscopy (HRESIMS) data, while the absolute configurations were determined by the X-ray diffraction and the electronic circular dichroism (ECD) data. Bioassay results indicated that phakellin-based alkaloids, including dibromoisophakellin and dibromophakellin, significantly reduced the biofilm formation of the bacterium E. coli. Present work provided a group of new natural scaffolds for the inhibitory effects against the biofilm formation of E. coli.
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Affiliation(s)
- Jingyuan Sun
- State Key Laboratory of Natural and Biomimetic Drugs, Peking University, Beijing 100191, China.
| | - Jiru Wu
- State Key Laboratory of Natural and Biomimetic Drugs, Peking University, Beijing 100191, China.
| | - Bang An
- State Key Laboratory of Natural and Biomimetic Drugs, Peking University, Beijing 100191, China.
| | - Nicole J de Voogd
- The Netherlands Centre for Biodiversity Naturalis, P.O. Box 9517, 2300 RA Leiden, The Netherlands.
| | - Wei Cheng
- State Key Laboratory of Natural and Biomimetic Drugs, Peking University, Beijing 100191, China.
| | - Wenhan Lin
- State Key Laboratory of Natural and Biomimetic Drugs, Peking University, Beijing 100191, China.
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Wang Q, An B, Shi H, Luo H, He C. High Concentration of Melatonin Regulates Leaf Development by Suppressing Cell Proliferation and Endoreduplication in Arabidopsis. Int J Mol Sci 2017; 18:ijms18050991. [PMID: 28475148 PMCID: PMC5454904 DOI: 10.3390/ijms18050991] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Revised: 04/22/2017] [Accepted: 05/02/2017] [Indexed: 02/07/2023] Open
Abstract
N-acetyl-5-methoxytryptamine (Melatonin), as a crucial messenger in plants, functions in adjusting biological rhythms, stress tolerance, plant growth and development. Several studies have shown the retardation effect of exogenous melatonin treatment on plant growth and development. However, the in vivo role of melatonin in regulating plant leaf growth and the underlying mechanism are still unclear. In this study, we found that high concentration of melatonin suppressed leaf growth in Arabidopsis by reducing both cell size and cell number. Further kinetic analysis of the fifth leaves showed that melatonin remarkably inhibited cell division rate. Additionally, flow cytometic analysis indicated that melatonin negatively regulated endoreduplication during leaf development. Consistently, the expression analysis revealed that melatonin regulated the transcriptional levels of key genes of cell cycle and ribosome. Taken together, this study suggests that high concentration of melatonin negatively regulated the leaf growth and development in Arabidopsis, through modulation of endoreduplication and the transcripts of cell cycle and ribosomal key genes.
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Affiliation(s)
- Qiannan Wang
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources and College of Biology, Institute of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China.
| | - Bang An
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources and College of Biology, Institute of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China.
| | - Haitao Shi
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources and College of Biology, Institute of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China.
| | - Hongli Luo
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources and College of Biology, Institute of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China.
| | - Chaozu He
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources and College of Biology, Institute of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China.
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An B, Li B, Li H, Zhang Z, Qin G, Tian S. Aquaporin8 regulates cellular development and reactive oxygen species production, a critical component of virulence in Botrytis cinerea. New Phytol 2016; 209:1668-80. [PMID: 26527167 DOI: 10.1111/nph.13721] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2015] [Accepted: 09/21/2015] [Indexed: 05/15/2023]
Abstract
Aquaporins (AQPs) are ubiquitous in nearly all organisms, mediating selective and rapid flux of water across biological membranes. The role of AQPs in phytopathogenic fungi is poorly understood. Orthologs of AQP genes in Botrytis cinerea were identified and knocked out. The effects of AQPs on hyphal growth and conidiation, formation of infection structures and virulence on plant hosts were examined. The role of AQP8 in reactive oxygen species (ROS) production, distribution and transport were further determined. Among eight AQPs, only AQP8 was essential for the ability of B. cinerea to infect plants. AQP8 was demonstrated to be an intrinsic plasma membrane protein, which may function as a channel and mediate hydrogen peroxide uptake. Deletion of AQP8 in B. cinerea completely inhibited the development of conidia and infection structures, and significantly affected noxR expression. Further observations revealed that both AQP8 and noxR impacted ROS distribution in the hyphal tips of B. cinerea. Moreover, AQP8 affected the expression of a mitochondrial protein, NQO1. A knockout mutant of NQO1 was observed to display reduced virulence. These data lead to a better understanding of the important role of AQP8 in the development and pathogenesis of plant pathogens.
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Affiliation(s)
- Bang An
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Boqiang Li
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
| | - Hua Li
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Zhanquan Zhang
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
| | - Guozheng Qin
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
| | - Shiping Tian
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
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42
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Li YJ, Wang YG, An B, Xu H, Liu Y, Zhang LC, Ma HY, Wang WM. A Practical Anodic and Cathodic Curve Intersection Model to Understand Multiple Corrosion Potentials of Fe-Based Glassy Alloys in OH- Contained Solutions. PLoS One 2016; 11:e0146421. [PMID: 26771194 PMCID: PMC4714945 DOI: 10.1371/journal.pone.0146421] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2015] [Accepted: 12/16/2015] [Indexed: 11/21/2022] Open
Abstract
A practical anodic and cathodic curve intersection model, which consisted of an apparent anodic curve and an imaginary cathodic line, was proposed to explain multiple corrosion potentials occurred in potentiodynamic polarization curves of Fe-based glassy alloys in alkaline solution. The apparent anodic curve was selected from the measured anodic curves. The imaginary cathodic line was obtained by linearly fitting the differences of anodic curves and can be moved evenly or rotated to predict the number and value of corrosion potentials.
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Affiliation(s)
- Y. J. Li
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, China
| | - Y. G. Wang
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, China
| | - B. An
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, China
| | - H. Xu
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, China
| | - Y. Liu
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, China
| | - L. C. Zhang
- School of Engineering, Edith Cowan University, 270 Joondalup Drive, Joondalup, Perth, WA6027, Australia
| | - H. Y. Ma
- School of Chemistry and Chemical Engineering, Shandong University, Jinan, Shandong 250100, China
| | - W. M. Wang
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, China
- * E-mail:
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Wang Q, An B, Wei Y, Reiter RJ, Shi H, Luo H, He C. Melatonin Regulates Root Meristem by Repressing Auxin Synthesis and Polar Auxin Transport in Arabidopsis. Front Plant Sci 2016. [PMID: 28018411 DOI: 10.3389/fpls.201601882] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Melatonin (N-acetyl-5-methoxytryptamine) plays important roles in regulating both biotic and abiotic stress tolerance, biological rhythms, plant growth and development. Sharing the same substrate (tryptophan) for the biosynthesis, melatonin and auxin also have similar effects in plant development. However, the specific function of melatonin in modulating plant root growth and the relationship between melatonin and auxin as well as underlying mechanisms are still unclear. In this study, we found high concentration of melatonin remarkably inhibited root growth in Arabidopsis by reducing root meristem size. Further studies showed that melatonin negatively regulated auxin biosynthesis, the expression of PINFORMED (PIN) proteins as well as auxin response in Arabidopsis. Moreover, the root growth of the triple mutant pin1pin3pin7 was more tolerant than that of wild-type in response to melatonin treatment, suggesting the essential role of PIN1/3/7 in melatonin-mediated root growth. Combination treatment of melatonin and 5-Triiodobenzoic acid (TIBA) did not enhance melatonin-mediated reduction of root meristem size, indicating that polar auxin transport (PAT) may be necessary for the regulation of root meristem size by melatonin treatment. Taken together, this study indicates that melatonin regulates root growth in Arabidopsis, through auxin synthesis and polar auxin transport, at least partially.
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Affiliation(s)
- Qiannan Wang
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Agriculture, Hainan University Haikou, China
| | - Bang An
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Agriculture, Hainan University Haikou, China
| | - Yunxie Wei
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Agriculture, Hainan University Haikou, China
| | - Russel J Reiter
- Department of Cell Systems and Anatomy, The University of Texas Health Science Center San Antonio, TX, USA
| | - Haitao Shi
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Agriculture, Hainan University Haikou, China
| | - Hongli Luo
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Agriculture, Hainan University Haikou, China
| | - Chaozu He
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Agriculture, Hainan University Haikou, China
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Shridhar PB, Noll LW, Shi X, An B, Cernicchiaro N, Renter DG, Nagaraja TG, Bai J. Multiplex Quantitative PCR Assays for the Detection and Quantification of the Six Major Non-O157 Escherichia coli Serogroups in Cattle Feces. J Food Prot 2016; 79:66-74. [PMID: 26735031 DOI: 10.4315/0362-028x.jfp-15-319] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Shiga toxin-producing Escherichia coli (STEC) serogroups O26, O45, O103, O111, O121, and O145, called non-O157 STEC, are important foodborne pathogens. Cattle, a major reservoir, harbor the organisms in the hindgut and shed them in the feces. Although limited data exist on fecal shedding, concentrations of non-O157 STEC in feces have not been reported. The objectives of our study were (i) to develop and validate two multiplex quantitative PCR (mqPCR) assays, targeting O-antigen genes of O26, O103, and O111 (mqPCR-1) and O45, O121, and O145 (mqPCR-2); (ii) to utilize the two assays, together with a previously developed four-plex qPCR assay (mqPCR-3) targeting the O157 antigen and three virulence genes (stx1, stx2, and eae), to quantify seven serogroups and three virulence genes in cattle feces; and (iii) to compare the three mqPCR assays to a 10-plex conventional PCR (cPCR) targeting seven serogroups and three virulence genes and culture methods to detect seven E. coli serogroups in cattle feces. The two mqPCR assays (1 and 2) were shown to be specific to the target genes, and the detection limits were 4 and 2 log CFU/g of pure culture-spiked fecal samples, before and after enrichment, respectively. A total of 576 fecal samples collected from a feedlot were enriched in E. coli broth and were subjected to quantification (before enrichment) and detection (after enrichment). Of the 576 fecal samples subjected, before enrichment, to three mqPCR assays for quantification, 175 (30.4%) were quantifiable (≥4 log CFU/g) for at least one of the seven serogroups, with O157 being the most common serogroup. The three mqPCR assays detected higher proportions of postenriched fecal samples (P > 0.01) as positive for one or more serogroups compared with cPCR and culture methods. This is the first study to assess the applicability of qPCR assays to detect and quantify six non-O157 serogroups in cattle feces and to generate data on fecal concentration of the six serogroups.
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Affiliation(s)
- P B Shridhar
- Department of Diagnostic Medicine and Pathobiology, Kansas State University, Manhattan, Kansas 66506, USA
| | - L W Noll
- Department of Diagnostic Medicine and Pathobiology, Kansas State University, Manhattan, Kansas 66506, USA
| | - X Shi
- Department of Diagnostic Medicine and Pathobiology, Kansas State University, Manhattan, Kansas 66506, USA
| | - B An
- Veterinary Diagnostic Laboratory, Kansas State University, Manhattan, Kansas 66506, USA
| | - N Cernicchiaro
- Department of Diagnostic Medicine and Pathobiology, Kansas State University, Manhattan, Kansas 66506, USA
| | - D G Renter
- Department of Diagnostic Medicine and Pathobiology, Kansas State University, Manhattan, Kansas 66506, USA
| | - T G Nagaraja
- Department of Diagnostic Medicine and Pathobiology, Kansas State University, Manhattan, Kansas 66506, USA.
| | - J Bai
- Veterinary Diagnostic Laboratory, Kansas State University, Manhattan, Kansas 66506, USA.
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Wang Q, An B, Wei Y, Reiter RJ, Shi H, Luo H, He C. Melatonin Regulates Root Meristem by Repressing Auxin Synthesis and Polar Auxin Transport in Arabidopsis. Front Plant Sci 2016; 7:1882. [PMID: 28018411 PMCID: PMC5156734 DOI: 10.3389/fpls.2016.01882] [Citation(s) in RCA: 82] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2016] [Accepted: 11/29/2016] [Indexed: 05/18/2023]
Abstract
Melatonin (N-acetyl-5-methoxytryptamine) plays important roles in regulating both biotic and abiotic stress tolerance, biological rhythms, plant growth and development. Sharing the same substrate (tryptophan) for the biosynthesis, melatonin and auxin also have similar effects in plant development. However, the specific function of melatonin in modulating plant root growth and the relationship between melatonin and auxin as well as underlying mechanisms are still unclear. In this study, we found high concentration of melatonin remarkably inhibited root growth in Arabidopsis by reducing root meristem size. Further studies showed that melatonin negatively regulated auxin biosynthesis, the expression of PINFORMED (PIN) proteins as well as auxin response in Arabidopsis. Moreover, the root growth of the triple mutant pin1pin3pin7 was more tolerant than that of wild-type in response to melatonin treatment, suggesting the essential role of PIN1/3/7 in melatonin-mediated root growth. Combination treatment of melatonin and 5-Triiodobenzoic acid (TIBA) did not enhance melatonin-mediated reduction of root meristem size, indicating that polar auxin transport (PAT) may be necessary for the regulation of root meristem size by melatonin treatment. Taken together, this study indicates that melatonin regulates root growth in Arabidopsis, through auxin synthesis and polar auxin transport, at least partially.
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Affiliation(s)
- Qiannan Wang
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Agriculture, Hainan University Haikou, China
| | - Bang An
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Agriculture, Hainan University Haikou, China
| | - Yunxie Wei
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Agriculture, Hainan University Haikou, China
| | - Russel J Reiter
- Department of Cell Systems and Anatomy, The University of Texas Health Science Center San Antonio, TX, USA
| | - Haitao Shi
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Agriculture, Hainan University Haikou, China
| | - Hongli Luo
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Agriculture, Hainan University Haikou, China
| | - Chaozu He
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Agriculture, Hainan University Haikou, China
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An B, Chen Y, Li B, Qin G, Tian S. Ca(2+)-CaM regulating viability of Candida guilliermondii under oxidative stress by acting on detergent resistant membrane proteins. J Proteomics 2014; 109:38-49. [PMID: 24998432 DOI: 10.1016/j.jprot.2014.06.022] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2014] [Revised: 06/10/2014] [Accepted: 06/26/2014] [Indexed: 11/18/2022]
Abstract
UNLABELLED Reactive oxygen species (ROS) play a vital role in reducing viability of yeast cells. The Ca(2+)-CaM signaling pathways are involved in regulating the intracellular ROS level in yeast cells under stress. Detergent resistant membranes (DRMs), the sterol-rich microdomains, participate in a wide range of cellular processes including growth, trafficking and death in yeast cells. In the present study, we found that Trifluoperazine (TFP), an antagonist of CaM, could increase the viability of Candida guilliermondii cells under H2O2 stress. Based on comparative analysis of DRM sub proteomics, a total number of 29 differentially expressed protein spots were identified, among which 8 protein spots belong to the electron transport chain and 7 protein spots belong to transporters. It is suggested that TFP treatment could modulate the intracellular ROS generation in yeast cells. We additionally ascertained that TFP treatment could effectively alleviate the ROS accumulation and protein damage in C. guilliermondii cells under H2O2 stress, via investigating the intracellular ROS levels and protein oxidative damage in yeast cells. These findings firstly revealed that the Ca(2+)-CaM signaling pathway is related to the viability of yeast cells under H2O2 stress, and provide novel evidences for exploring Ca(2+)-CaM's role in regulating this viability via acting on DRM proteins. BIOLOGICAL SIGNIFICANCE Detergent-resistant membranes (DRMs), which are more resistant to extraction with cold non-ionic detergents, have been considered the functional microdomains in the plasma membrane. In yeast, DRMs are involved in a wide range of additional cellular processes including cell growth and death. The Ca(2+)-CaM signaling pathways could regulate the stress tolerance of yeast cells by modulating the intracellular ROS generation. In this study, we found that trifluoperazine (TFP), a calmodulin antagonist, could increase the viability of C. guilliermondii under H2O2 stress. Based on comparative analysis of DRM sub proteomics, electron transport chain proteins and transporters were identified to be associated with the Ca(2+)-CaM transduction. We proved that TFP treatment decreases the intracellular ROS accumulation and alleviates oxidative damage to cellular proteins. These results ascertain that Ca(2+)-CaM is involved in regulating the viability of C. guilliermondii under oxidative stress via acting on the DRM proteins.
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Affiliation(s)
- Bang An
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yong Chen
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Boqiang Li
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
| | - Guozheng Qin
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
| | - Shiping Tian
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China.
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Abstract
Previously we found that retinoblastoma protein (RB) became dephosphorylated in an early stage of DNA damage-induced, p53-independent apoptosis. Here, we report that both RB dephosphorylation and apoptosis are regulated by relative levels of RB kinases (cyclin-dependent kinases, or cdks) and phosphatases. Treatment of human Jurkat T cells with roscovitine, a potent and selective synthetic inhibitor of several cdks, rapidly induced RB dephosphorylation, which was followed by induction of apoptosis-associated internucleosomal DNA fragmentation. The roscovitine treatment did not increase levels of the endogenous cdk inhibitor proteins p16(Ink4a), p27(kip1) and p21(Waf1), supporting the idea that the observed RB dephosphorylation was due to a direct inhibition of cdk activities by roscovitine. Treatment with a protein kinase C inhibitor (sphingosine or staurosporine), which leads to suppression of several cdk kinase activities, also induced cellular RB dephosphorylation and apoptosis. Finally, roscovitine- or sphingosine-induced RB dephosphorylation was blocked by a specific inhibitor of protein-serine/threonine phosphatases (calyculin A or okadaic acid). Therefore, RB phosphorylation status and cellular fate are regulated by the ratio of RB kinases to RB phosphatases.
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Affiliation(s)
- B An
- UNIV PITTSBURGH,SCH MED,DEPT PHARMACOL,PITTSBURGH,PA 15213. UNIV PITTSBURGH,INST CANC,PITTSBURGH,PA 15213. CNRS,BIOL STN,F-29682 ROSCOFF,FRANCE
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An B, Li B, Qin G, Tian S. Exogenous calcium improves viability of biocontrol yeasts under heat stress by reducing ROS accumulation and oxidative damage of cellular protein. Curr Microbiol 2012; 65:122-7. [PMID: 22562600 DOI: 10.1007/s00284-012-0133-4] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2011] [Accepted: 04/18/2012] [Indexed: 11/24/2022]
Abstract
In this article, we investigated the effect of exogenous calcium on improving viability of Debaryomyces hansenii and Pichia membranaefaciens under heat stress, and evaluated the role of calcium in reducing oxidant damage of proteins in the yeast cells. The results indicated that high concentration of exogenous calcium in culture medium was beneficial for enhancing the tolerance of the biocontrol yeasts to heat stress. The possible mechanism of calcium improving the viability of yeasts was attributed to enhancement of antioxidant enzyme activities, decrease in ROS accumulation and reduction of oxidative damage of intracellular protein in yeast cells under heat stress. D. hansenii is more sensitive to calcium as compared to P. membranaefaciens. Our results suggest that application of exogenous calcium combined with biocontrol yeasts is a practical approach for the control of postharvest disease in fruit.
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Affiliation(s)
- Bang An
- Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Xiangshan, Beijing, People's Republic of China
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An B, Bai Y, Yang F. A 3D Chiral Hydrogen Bond Framework Based on Phenanthrolinium Hydrogen 4,5-Dichlorophthalate: Crystal Structure and Luminescent Properties. Z Naturforsch B 2012. [DOI: 10.5560/znb.2012.67b0085] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Li ZH, Yin WQ, Ma H, Liu WL, Li SS, Zhang ML, Chu WJ, An B. [A survey on the agricultural profession-related injuries among 11 902 rural residents in Shandong province]. Zhonghua Liu Xing Bing Xue Za Zhi 2011; 32:768-772. [PMID: 22093464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
OBJECTIVE To understand the prevalence and risk factors of agricultural activities related injuries among rural residents in Shandong province. METHODS A retrospective investigation was conducted among agricultural profession-related workers in 20 villages with multistage cluster sampling method in Shandong province. Four times face-to-face interview were conducted by trained interviewers, including 32 students and local medical personnel under constructed questionnaires. Accidental injuries occurred in the activities or in the agricultural profession-related jobs were recorded, from May 1(st)2009 to April 30(st) 2010. Data was input and analyzed by SPSS 13.0 statistical software. RESULTS A total of 837 cases reported at least 1 job-related injury out of the 11 902 people who had been surveyed in one year. The crude incidence rate was 7.03% and the standardized incidence rate was 7.36%, higher in males (9.01%) than in females (4.10%), χ² = 105.53, P = 0.000. Children and adolescents (≤ 14 aged) had the higher incidence rate (9.50%), χ² = 9.70, P = 0.008. People working in the area of commercial service related to agricultural products had the highest incidence rate (12.94%). In particular, those occupations that related to agricultural construction or materials appeared to have had higher incidence rates as 16.80% and 15.59% respectively, than other kinds of jobs (χ² = 167.30, P = 0.000). There were higher proportion of injuries occurred in the roads (28.79%), in the fields (28.08%)during labor work (38.00%) transportation (27.97%), respectively. The seasonality of agricultural injures mostly occurred between June and August, accounted for 47.43%. Major external causes related to injuries were instruments or tools (31.42%) being used, transportation (24.13%) and falls (20.19%). Wounds on limbs took the majority (56.39%). The accidental self-inflicted injury occupied 76.82%, while accidents to passive injuries occupied 11.47%, other kinds accounted for 11.71%. Most of the accidents caused mild or moderate damage, accounted for 60.22% and 30.34% respectively. 7 cases died of injuries, with the fatality rate as 0.84% and the mortality rate was 58.81 per one hundred thousand. 72 cases ended up in disability caused by injuries, with the morbidity rate as 6.05 per thousand. Answers to the major internal causes of injuries appeared to be: "did not know how to protect oneself" (29.87%) with females (45.41%) in particular, followed by"over fatigue" and "inappropriate treatment" which took the 2(nd) place in males. Major natural environmental factors of injuries would relate to "high air temperature and humidity but lower wind velocity" (14.93%), "unclear signs on the country road" (12.19%), "the sky was cloudy or dark" (10.87%), "slippery road caused by rain or snow" (10.51%), "kids were unintended" (10.27%) etc. Most of the wounded received treatment clinically (50.18%), with the percentile (P₅₀) of medical cost as 182.76 RMB (Yuan). The proportion of inpatient was 27.72% and with percentile of time as P(50) = 7.57 day and cost as P(50) = 2840.00 RMB Yuan. The wounded had a rest of P₅₀ = 5.9 days, with an indirect cost as P(50) = 233.16 RMB Yuan. CONCLUSION The results of this study indicated that the incidence of agricultural profession-related injuries was high, with serious harm. Behavioral intervention and awareness of injuries should be enhanced, together with the improvement of environmental condition.
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Affiliation(s)
- Zhi-hua Li
- Department of Epidemiology, School of Public Health, Weifang Medical College, China.
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