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Yang C, Ma Y, Wang Y, Zhang M, Chang X, Jiang C, Gong G, Qiu X, Chen H. Discovery of a Potential Molluscicide Based on Protein PcRoo in Gill Cilia of Pomacea canaliculata. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:3210-3218. [PMID: 36752052 DOI: 10.1021/acs.jafc.2c08643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
In modern pesticide discovery, target-based drug design is an attractive and cost-effective approach. Previous studies found that protein rootletin (PcRoo) is a target protein of arecoline, when interacted with Pomacea canaliculata. In this study, we modeled the target protein through threading, and the binding energy between arecoline and protein PcRoo was calculated as -5.02 kcal/mol by molecular docking. Furthermore, two target compounds, baclofen and acedoben, with molluscicidal activity in theory were obtained by virtual screening in database DrugBank. The in vivo bioassay showed that baclofen could induce typical poisoning symptoms on P. canaliculata, which were characterized by weakness of foot muscles and loss of gill cilia, and the LC50 value was 16.2437 mg/L (72 h). Additionally, after 15 mg/L baclofen treatment, the oxygen consumption rate, ammonia excretion rate, and oxygen nitrogen ratio of P. canaliculata declined. Furthermore, the treatment of baclofen also decreased the gene expression level of PcRoo. These trends were the same as the changes after 5 mg/L arecoline treatment. The pharmacophore characteristics were further analyzed, and the results showed that the chemical structures of baclofen and arecoline were correlated in molluscicidal activity. These findings indicate that baclofen has the potential to be used as a molluscicide in agricultural production, and other new molluscicides may be obtained by virtual screening based on protein PcRoo.
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Affiliation(s)
- Chunping Yang
- College of Agronomy, Sichuan Agricultural University, Chengdu, Sichuan 611130, People's Republic of China
| | - Yuqing Ma
- College of Agronomy, Sichuan Agricultural University, Chengdu, Sichuan 611130, People's Republic of China
| | - Yanmei Wang
- College of Agronomy, Sichuan Agricultural University, Chengdu, Sichuan 611130, People's Republic of China
| | - Min Zhang
- College of Agronomy, Sichuan Agricultural University, Chengdu, Sichuan 611130, People's Republic of China
| | - Xiaoli Chang
- College of Agronomy, Sichuan Agricultural University, Chengdu, Sichuan 611130, People's Republic of China
| | - Chunxian Jiang
- College of Agronomy, Sichuan Agricultural University, Chengdu, Sichuan 611130, People's Republic of China
| | - Guoshu Gong
- College of Agronomy, Sichuan Agricultural University, Chengdu, Sichuan 611130, People's Republic of China
| | - Xiaoyan Qiu
- College of Agronomy, Sichuan Agricultural University, Chengdu, Sichuan 611130, People's Republic of China
| | - Huabao Chen
- College of Agronomy, Sichuan Agricultural University, Chengdu, Sichuan 611130, People's Republic of China
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Cui J, Zhang H, Mo Z, Yu M, Liang Z. Cell wall thickness and the molecular mechanism of heterogeneous vancomycin-intermediate Staphylococcus aureus. Lett Appl Microbiol 2021; 72:604-609. [PMID: 33539564 PMCID: PMC8248079 DOI: 10.1111/lam.13456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Revised: 01/28/2021] [Accepted: 01/28/2021] [Indexed: 12/04/2022]
Abstract
Methicillin‐resistant Staphylococcus aureus (MRSA) with reduced sensitivity to vancomycin (VAN) has caused many clinical cases of VAN treatment failure, but the molecular mechanism underlying the reduced sensitivity to VAN is still unclear. We isolated a heterogeneous VAN‐intermediate Staphylococcus aureus (hVISA), which was also a MRSA strain with reduced sensitivity to VAN. To investigate the molecular mechanism underlying the reduced sensitivity to VAN exhibited by the hVISA strain, we compared the hVISA strain with a VAN‐sensitive MRSA strain, known as the N315 strain. The images captured by transmission electron microscopy showed that the cell wall of the hVISA strain was significantly thicker than that of the N315 strain (36·72 ± 1·04 nm vs 28·15 ± 1·25 nm, P < 0·05), and the results of real‐time quantitative PCR analysis suggested that the expression levels of the cell wall thickness related genes (glmS, vraR/S, sgtB, murZ and PBP4) of the hVISA strain were significantly higher than those of the N315 strain (P < 0·05). In conclusion, this study indicated that the upregulation of the expression of the genes related to cell wall synthesis might be the molecular mechanism underlying the cell wall thickening of the hVISA strain and might be related to its resistance to VAN.
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Affiliation(s)
- J Cui
- Department of Pulmonary and Critical Care Medicine, Chinese PLA General Hospital, Beijing, China
| | - H Zhang
- Department of Respiratory disease, Beijing Luhe Hospital Affiliated to Capital Medical University, Beijing, China
| | - Z Mo
- Department of Pulmonary and Critical Care Medicine, Chinese PLA General Hospital, Beijing, China
| | - M Yu
- Department of Pulmonary and Critical Care Medicine, Chinese PLA General Hospital, Beijing, China
| | - Z Liang
- Department of Pulmonary and Critical Care Medicine, Chinese PLA General Hospital, Beijing, China
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