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Chen Q, Ma B, Xu M, Xu H, Yan Z, Wang F, Wang Y, Huang Z, Yin S, Zhao Y, Wang L, Wu H, Liu X. Comparative proteomics study of exosomes in Vibrio harveyi and Vibrio anguillarum. Microb Pathog 2023:106174. [PMID: 37244489 DOI: 10.1016/j.micpath.2023.106174] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 05/17/2023] [Accepted: 05/23/2023] [Indexed: 05/29/2023]
Abstract
Exosomes are a class of extracellular vesicles released by bacteria and contain diverse biomolecules. In this study, we isolated exosomes from Vibrio harveyi and Vibrio anguillarum, which are both serious pathogens in mariculture, using a supercentrifugation method, and the proteins in the exosomes of these two vibrios were analyzed by LC-MS/MS proteomics. Exosome proteins released by V. harveyi and V. anguillarum were different; they not only contained virulence factors (such as lipase and phospholipase in V. harveyi, metalloprotease and hemolysin in V. anguillarum), but also participated in the important life activities of bacteria (such as fatty acid biosynthesis, biosynthesis of antibiotics, carbon metabolism). Subsequently, to verify whether the exosomes participated in bacterial toxicity, after Ruditapes philippinarum was challenged with V. harveyi and V. anguillarum, the corresponding genes of virulence factors from exosomes screened by proteomics were tested by quantitative real-time PCR. All the genes detected were upregulated which suggested that exosomes were involved in vibrio toxicity. The results could provide an effective proteome database for decoding the pathogenic mechanism of vibrios from the exosome perspective.
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Affiliation(s)
- Qian Chen
- Key Laboratory of Marine Biotechnology in Universities of Shandong, School of Life Sciences, Ludong University, Yantai, 264025, PR China
| | - Bangguo Ma
- Key Laboratory of Marine Biotechnology in Universities of Shandong, School of Life Sciences, Ludong University, Yantai, 264025, PR China
| | - Mingzhe Xu
- Key Laboratory of Marine Biotechnology in Universities of Shandong, School of Life Sciences, Ludong University, Yantai, 264025, PR China
| | - Huiwen Xu
- Key Laboratory of Marine Biotechnology in Universities of Shandong, School of Life Sciences, Ludong University, Yantai, 264025, PR China
| | - Zimiao Yan
- Key Laboratory of Marine Biotechnology in Universities of Shandong, School of Life Sciences, Ludong University, Yantai, 264025, PR China
| | - Fei Wang
- Key Laboratory of Marine Biotechnology in Universities of Shandong, School of Life Sciences, Ludong University, Yantai, 264025, PR China
| | - Yiran Wang
- Key Laboratory of Marine Biotechnology in Universities of Shandong, School of Life Sciences, Ludong University, Yantai, 264025, PR China
| | - Zitong Huang
- Key Laboratory of Marine Biotechnology in Universities of Shandong, School of Life Sciences, Ludong University, Yantai, 264025, PR China
| | - Shuchang Yin
- Key Laboratory of Marine Biotechnology in Universities of Shandong, School of Life Sciences, Ludong University, Yantai, 264025, PR China
| | - Yancui Zhao
- Key Laboratory of Marine Biotechnology in Universities of Shandong, School of Life Sciences, Ludong University, Yantai, 264025, PR China
| | - Lei Wang
- Key Laboratory of Marine Biotechnology in Universities of Shandong, School of Life Sciences, Ludong University, Yantai, 264025, PR China
| | - Hongyan Wu
- Key Laboratory of Marine Biotechnology in Universities of Shandong, School of Life Sciences, Ludong University, Yantai, 264025, PR China
| | - Xiaoli Liu
- Key Laboratory of Marine Biotechnology in Universities of Shandong, School of Life Sciences, Ludong University, Yantai, 264025, PR China.
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Monzón-Atienza L, Bravo J, Fernández-Montero Á, Charlie-Silva I, Montero D, Ramos-Vivas J, Galindo-Villegas J, Acosta F. Dietary supplementation of Bacillus velezensis improves Vibrio anguillarum clearance in European sea bass by activating essential innate immune mechanisms. Fish Shellfish Immunol 2022; 124:244-253. [PMID: 35421573 DOI: 10.1016/j.fsi.2022.03.032] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [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: 12/29/2021] [Revised: 02/11/2022] [Accepted: 03/21/2022] [Indexed: 06/14/2023]
Abstract
Bacillus spp. supplementation as probiotics in cultured fish diets has a long history of safe and effective use. Specifically, B. velezensis show great promise in fine-tuning the European sea bass disease resistance against the pathogenicity caused by several members of the Vibrio family. However, the immunomodulatory mechanisms behind this response remain poorly understood. Here, to examine the inherent immune variations in sea bass, two equal groups were fed for 30 days with a steady diet, with one treatment supplemented with B. velezensis. The serum bactericidal capacity against live cells of Vibrio anguillarum strain 507 and the nitric oxide and lysozyme lytic activities were assayed. At the cellular level, the phagocytic response of peripheral blood leukocytes against inactivated Candida albicans was determined. Moreover, head-kidney (HK) total leukocytes were isolated from previously in vivo treated fish with LPS of V. anguillarum strain 507. Mechanistically, the expression of some essential proinflammatory genes (interleukin-1 (il1b), tumor necrosis factor-alpha (tnfa), and cyclooxygenase 2 (cox2) and the sea bass specific antimicrobial peptide (AMP) dicentracin (dic) expressions were assessed. Surprisingly, the probiotic supplementation significantly increased all humoral lytic and cellular activities assayed in the treated sea bass. In addition, time-dependent differences were observed between the control and probiotic treated groups for all the HK genes markers subjected to the sublethal LPS dose. Although the il1b was the fastest responding gene to a significant level at 48 h post-injection (hpi), all the other genes followed 72 h in the probiotic supplemented group. Finally, an in vivo bacteria challenge against live V. anguillarum was conducted. The probiotic fed fish observed a significantly higher survival. Overall, our results provide clear vertical evidence on the beneficial immune effects of B. velezensis and unveil some fundamental immune mechanisms behind its application as a probiotic agent in intensively cultured European sea bass.
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Affiliation(s)
- Luis Monzón-Atienza
- Grupo de Investigación en Acuicultura (GIA), Instituto Ecoaqua, Universidad de Las Palmas de Gran Canaria, Spain
| | - Jimena Bravo
- Grupo de Investigación en Acuicultura (GIA), Instituto Ecoaqua, Universidad de Las Palmas de Gran Canaria, Spain
| | - Álvaro Fernández-Montero
- Grupo de Investigación en Acuicultura (GIA), Instituto Ecoaqua, Universidad de Las Palmas de Gran Canaria, Spain
| | - Ives Charlie-Silva
- Department of Pharmacology, Institute of Biomedical Sciences, University of Sao Paulo, SP, Brazil
| | - Daniel Montero
- Grupo de Investigación en Acuicultura (GIA), Instituto Ecoaqua, Universidad de Las Palmas de Gran Canaria, Spain
| | - José Ramos-Vivas
- Grupo de Investigación en Acuicultura (GIA), Instituto Ecoaqua, Universidad de Las Palmas de Gran Canaria, Spain
| | | | - Félix Acosta
- Grupo de Investigación en Acuicultura (GIA), Instituto Ecoaqua, Universidad de Las Palmas de Gran Canaria, Spain
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Saleh EM, Hamdy GM, Hassan RE. Neuroprotective effect of sodium alginate against chromium-induced brain damage in rats. PLoS One 2022; 17:e0266898. [PMID: 35421180 PMCID: PMC9009676 DOI: 10.1371/journal.pone.0266898] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Accepted: 03/29/2022] [Indexed: 12/28/2022] Open
Abstract
Oral exposure to chromium hexavalent [Cr(VI)] has disastrous impacts and affects many people worldwide. Cr(VI) triggers neurotoxicity via its high oxidation potential by generating high amount of ROS. Meanwhile, alginates are known by their chelating activity and ability to bind heavy metals and toxins, in addition to their antioxidant, anti-inflammatory, and anti-apoptotic activities. So, this study aimed to explore the neuroprotective potential of sodium alginate (SA) against cellular injury, DNA damage, macromolecule alterations, and apoptosis induced by oral ingestion of Cr. Forty Wistar male rats were divided into 4 groups; group I: standard control ingested with the vehicle solution, group II: Cr-intoxicated group received 10 mg/kg b.w. of potassium dichromate orally by gavage and kept without treatment, group III: SA group in which rats were orally exposed to 200 mg/kg b.w. of SA only, and group IV: SA-treated group that received 200 mg/kg b.w. of SA along with Cr for 28 consecutive days. Neurotransmitters such as Acetyl choline esterase (AchE), Monoamine oxidase A (MAOA) concentrations, Dopamine (DA) and 5-Hydroxytryptamine (5-HT) levels were assessed in brain homogenate tissues. Neurobiochemical markers; NAD+ and S100B protein were investigated in the brain tissues and serum, respectively. Levels of HSP70, caspase-3, protein profiling were evaluated. DNA damage was determined using the Comet assay. Results revealed a significant reduction in the AchE and MAOA concentrations, DA, 5-HT, and NAD+ levels, with an increase in the S100B protein levels. Cr(VI) altered protein pattern and caused DNA damage. High levels of HSP70 and caspase-3 proteins were observed. Fortunately, oral administration of SA prevented the accumulation of Cr in brain homogenates and significantly improved all investigated parameters. SA attenuated the ROS production and relieved the oxidative stress by its active constituents. SA can protect against cellular and DNA damage and limit apoptosis. SA could be a promising neuroprotective agent against Cr(VI)-inducing toxicity.
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