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Ma Y, Chen H, Yang C, Zhang M, Gong G, Chang X, Jiang C, Yue G, Qiu X, Luo L. Validation of target protein PcnWAS in Pomacea canaliculata and screening of target-based molluscicidal compounds. Pestic Biochem Physiol 2023; 192:105424. [PMID: 37105626 DOI: 10.1016/j.pestbp.2023.105424] [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] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Revised: 03/29/2023] [Accepted: 04/06/2023] [Indexed: 06/19/2023]
Abstract
Virtual screening is an efficient way to obtain new drugs, which has become an important method in the field of pesticide research. Protein neural wiskott-Aldrich syndrome isoform X1 (PcnWAS) is a target protein that exists in the haemocytes of Pomacea canaliculata, and in this study, isothermal titration calorimetry (ITC) was used to evaluate the binding ability of protein PcnWAS and pedunsaponin A in vitro. Furthermore, it was set as a receptor, and the design of molluscicidal compounds based on protein PcnWAS was carried out. Results showed that, pedunsaponin A had high binding capacity with protein PcnWAS, and the binding constant (Ka) was 2.98 ± 1.74 × 10-4. A new potential molluscicidal compound thionicotinamide-adenine-dinucleotide (thionicotinamide-DPN) was obtained by virtual screening. In-vivo bioassay indicated that, the LC50 value was 57.7102 mg/L (72 h), and the oxygen consumption rate, ammonia excretion rate, oxygen nitrogen ratio and hemocyanin content of P. canaliculata declined after 60 mg/L thionicotinamide-DPN treated. Furthermore, the treatment of thionicotinamide-DPN also decreased gene expression level of protein PcnWAS. The results of ITC test showed that thionicotinamide-DPN can bind with protein PcnWAS efficiently, which means that it has the same target with pedunsaponin A when interacted with P. canaliculata. All the above results lay a foundation for the development of new molluscicides.
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Affiliation(s)
- Yuqing Ma
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China
| | - Huabao Chen
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China.
| | - Chunping Yang
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China.
| | - Min Zhang
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China
| | - Guoshu Gong
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China
| | - Xiaoli Chang
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China.
| | - Chunxian Jiang
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China
| | - Guizhou Yue
- College of Science, Sichuan Agricultural University, Ya'an 625014, China.
| | - Xiaoyan Qiu
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China
| | - Liya Luo
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China
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Yang C, Ran X, Zhou Y, Huang Y, Yue G, Zhang M, Gong G, Chang X, Qiu X, Chen H. Study on the relationship of Hsp70 with the temperature sensitivity of pedunsaponin A poisoning Pomacea canaliculata. Pestic Biochem Physiol 2022; 188:105243. [PMID: 36464353 DOI: 10.1016/j.pestbp.2022.105243] [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] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Revised: 09/05/2022] [Accepted: 09/13/2022] [Indexed: 06/17/2023]
Abstract
Previous studies have found that temperature influences molluscicidal the activity of pedunsaponin A (PA), which may be related to the expression of Hsp70, a cold-tolerance gene in Pomacea canaliculata. We determined the temperature effect of PA and the relationship between Hsp70 and temperature sensitivity of P. canaliculata poisoned by PA. Toxicity tests resulted in LC50 values of 17.7239 mg⋅L-1 at 10 °C, which decreased to 2.5774 mg⋅L-1 at 30 °C, implying a positive correlation between toxicity of PA and temperature. After Hsp70 being interfered, the mortality rate of P. canaliculata treated with PA for 72 h was 70%, which was significantly higher than that of snails treated with PA for 72 h without interfering (56.7%). Meanwhile, immune enzyme activities such as SOD, ACP and AKP were significantly increased in the interfered group and expression level of PcAdv in the gill was also significantly increased. These results suggest that deletion of Hsp70 promotes the activation of some immune enzymes of P. canaliculata and elevates the content of target proteins to cope with the dual stresses of low temperatures and molluscicides. These findings indicate that the Hsp70 plays an important role in influencing the temperature sensitivity of P. canaliculata when treated with PA.
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Affiliation(s)
- Chunping Yang
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China
| | - Xiao Ran
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China
| | - Yue Zhou
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China
| | - Yuting Huang
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China
| | - Guizhou Yue
- College of Science, Sichuan Agricultural University, Ya'an 625014, China.
| | - Min Zhang
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China
| | - Guoshu Gong
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China
| | - Xiaoli Chang
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China.
| | - Xiaoyan Qiu
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China
| | - Huabao Chen
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China.
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Yang C, Zhang Y, Zhou Y, Chen H, Lv T, Luo L, Qiu X, Zhang M, Qin G, Gong G. Screening and functional verification of the target protein of pedunsaponin A in the killing of Pomacea canaliculata. Ecotoxicol Environ Saf 2021; 220:112393. [PMID: 34098426 DOI: 10.1016/j.ecoenv.2021.112393] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 01/24/2021] [Revised: 05/28/2021] [Accepted: 05/30/2021] [Indexed: 06/12/2023]
Abstract
Previous study found that pedunsaponin A (PA) influenced the cytoskeleton of Pomacea canaliculata hemocytes, leading to depolarization and haemocyte destruction and eventually to snail death. In this study, we analysed the changes in protein expression by iTRAQ-mediated proteomics and identified 51 downregulated proteins. Among these, we focused on proteins related to cytoskeletal function and identified neural Wiskott-Aldrich syndrome isoform X1 (PcnWAS). The full-length PcnWAS gene contains 9791 bp and includes an open reading frame of 1401 bp that encodes 735 amino acids with a predicted molecular mass of 49.83 kD. PcnWAS exhibited a relatively distant genetic relationship with known species; the closest homologue is Biomphalaria glabrata (57%). RNA interference (RNAi) was adopted to verify the function of PcnWAS after screening the siRNA sequence with an efficiency of 97%. Interference with the gene expression of PcnWAS did not lead to snail death, but the depolarization level increased, which demonstrated that PcnWAS is an important depolarization-related protein. The results of PA treatment of snails subjected to RNAi proved that interfering with PcnWAS gene expression decreased the molluscicidal activity of PA toward P. canaliculata; snail mortality after RNAi was significantly lower (40%) than that in PA-treated snails without RNAi (54%), while the survival rate and depolarization level in haemocytes were not significant, indicating that PcnWAS is only one of the important target proteins of PA in P. canaliculata. This study lays the foundation for further exploration of the molecular mechanism by which PA kills this harmful snail.
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Affiliation(s)
- Chunping Yang
- College of Agronomy, Sichuan Agricultural University, Chengdu, Sichuan, China.
| | - Yangyang Zhang
- College of Agronomy, Sichuan Agricultural University, Chengdu, Sichuan, China.
| | - Yue Zhou
- College of Agronomy, Sichuan Agricultural University, Chengdu, Sichuan, China.
| | - Huabao Chen
- College of Agronomy, Sichuan Agricultural University, Chengdu, Sichuan, China.
| | - Tianxing Lv
- College of Agronomy, Sichuan Agricultural University, Chengdu, Sichuan, China.
| | - Liya Luo
- College of Agronomy, Sichuan Agricultural University, Chengdu, Sichuan, China.
| | - Xiaoyan Qiu
- College of Agronomy, Sichuan Agricultural University, Chengdu, Sichuan, China.
| | - Min Zhang
- College of Agronomy, Sichuan Agricultural University, Chengdu, Sichuan, China.
| | - Guangwei Qin
- College of Agronomy, Sichuan Agricultural University, Chengdu, Sichuan, China.
| | - Guoshu Gong
- College of Agronomy, Sichuan Agricultural University, Chengdu, Sichuan, China.
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Yang C, Lv T, Wang B, Qiu X, Luo L, Zhang M, Yue G, Qin G, Xie D, Chen H. The Damaging Effects of Pedunsaponin A on Pomacea canaliculata Hemocytes. Toxins (Basel) 2019; 11:E390. [PMID: 31277361 DOI: 10.3390/toxins11070390] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2019] [Revised: 07/01/2019] [Accepted: 07/03/2019] [Indexed: 11/19/2022] Open
Abstract
Pomacea canaliculata hemocytes are the main functional cells in the immune defense system, and hemocyte destruction disrupts the immune response mechanism of P. canaliculata, resulting in abnormal growth, development, reproduction, and even death. Our previous study found that Pedunsaponin A significantly affects P. canaliculata hemocyte structure. This study further investigated the damaging effects of Pedunsaponin A on P. canaliculata hemocytes. The cell mortality rate results showed that the hemocyte mortality was significantly increased after treatment with Pedunsaponin A, and the mortality rate exhibited a significant positive correlation with treatment time and dose. The membrane potential results showed that the cell membranes of P. canaliculata hemocytes exhibited time-dependent membrane depolarization after 40 mg/L Pedunsaponin A treatment. At 36 h, the cell depolarization rate in the Pedunsaponin A treatment group was 41.43%, which was significantly greater than the control group (6.24%). The cytoskeleton results showed that Pedunsaponin A led to disordered and dispersed arrangement of microfilaments and changes in the cytoskeletal structure. The apoptosis and cell cycle results showed that Pedunsaponin A induced apoptosis and influenced the cell cycle to some extent. These results showed that the cell membrane and cytoskeleton of P. canaliculata hemocytes were damaged after treatment with Pedunsaponin A, which led to an increase in cell mortality, dysfunction, cell cycle abnormalities and apoptosis. This study provides a foundation for further identification of the site of Pedunsaponin A activity on hemocytes.
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Yang C, Tian Y, Lv T, Chang X, Zhang M, Gong G, Zhao L, Yang S, Chen H. Histopathological effects of Pedunsaponin A on Pomacea canaliculata. Pestic Biochem Physiol 2018; 148:151-158. [PMID: 29891366 DOI: 10.1016/j.pestbp.2018.04.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [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: 12/27/2017] [Revised: 04/09/2018] [Accepted: 04/23/2018] [Indexed: 06/08/2023]
Abstract
Pedunsaponin A, a novel molluscicidal compound isolated from Pueraria peduncularis, exhibits strong toxicity against Pomacea canaliculata. To determine the mechanisms of Pedunsaponin A toxicity, its effects on the organs and hemocytes of P. canaliculata were examined in this study. The results showed that Pedunsaponin A had significant toxic effects on different organs of the snail, including the lungs, gills, mantle, siphon tube, ventricle, pericardial cavity, hepatopancreas, kidneys, and the major symptom of this toxicity was the loss of cilia in the lungs and gills. Additionally, in further studies on the effects of Pedunsaponin A treatment, we found that the hemocyte count was changed and hemocyte morphology was damaged, which was primarily reflected by cytoplasm leakage, nuclei deformation, and significant reductions in the number of ribosomes and granulocyte mitochondria. Based on these results and considering that blood vessels are distributed in the lungs and gills, we hypothesized that Pedunsaponin A would first destroy the cilia, which disrupt physiological activities such as respiration, excretion and feeding, and then enter the hemolymph through blood vessels, disrupt the normal function of the hemocytes and destroy the snail immune system, eventually resulting in the death of the snail.
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Affiliation(s)
- Chunping Yang
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China
| | - Yue Tian
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China
| | - Tianxing Lv
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China
| | - Xiaoli Chang
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China
| | - Min Zhang
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China
| | - Guoshu Gong
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China
| | - Liulan Zhao
- College of Animal Science, Sichuan Agricultural University, Chengdu 611130, China
| | - Song Yang
- College of Animal Science, Sichuan Agricultural University, Chengdu 611130, China
| | - Huabao Chen
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China.
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