1
|
Liu Y, Yuan J, Li Y, Bi Y, Prusky DB. The sensor protein AaSho1 regulates infection structures differentiation, osmotic stress tolerance and virulence via MAPK module AaSte11-AaPbs2-AaHog1 in Alternaria alternata. Comput Struct Biotechnol J 2024; 23:1594-1607. [PMID: 38680872 PMCID: PMC11047198 DOI: 10.1016/j.csbj.2024.04.031] [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: 01/20/2024] [Revised: 04/01/2024] [Accepted: 04/11/2024] [Indexed: 05/01/2024] Open
Abstract
The high-osmolarity-sensitive protein Sho1 functions as a key membrane receptor in phytopathogenic fungi, which can sense and respond to external stimuli or stresses, and synergistically regulate diverse fungal biological processes through cellular signaling pathways. In this study, we investigated the biological functions of AaSho1 in Alternaria alternata, the causal agent of pear black spot. Targeted gene deletion revealed that AaSho1 is essential for infection structure differentiation, response to external stresses and synthesis of secondary metabolites. Compared to the wild-type (WT), the ∆AaSho1 mutant strain showed no significant difference in colony growth, morphology, conidial production and biomass accumulation. However, the mutant strain exhibited significantly reduced levels of melanin production, cellulase (CL) and ploygalacturonase (PG) activities, virulence, resistance to various exogenous stresses. Moreover, the appressorium and infection hyphae formation rates of the ∆AaSho1 mutant strain were significantly inhibited. RNA-Seq results showed that there were four branches including pheromone, cell wall stress, high osmolarity and starvation in the Mitogen-activated Protein Kinase (MAPK) cascade pathway. Furthermore, yeast two-hybrid experiments showed that AaSho1 activates the MAPK pathway via AaSte11-AaPbs2-AaHog1. These results suggest that AaSho1 of A. alternata is essential for fungal development, pathogenesis and osmotic stress response by activating the MAPK cascade pathway via Sho1-Ste11-Pbs2-Hog1.
Collapse
Affiliation(s)
- Yongxiang Liu
- College of Food Science and Engineering, Gansu Agricultural University, Lanzhou, China
- College of Horticulture, Xinyang Agriculture and Forestry University, Xinyang, China
| | - Jing Yuan
- College of Food Science and Engineering, Gansu Agricultural University, Lanzhou, China
| | - Yongcai Li
- College of Food Science and Engineering, Gansu Agricultural University, Lanzhou, China
| | - Yang Bi
- College of Food Science and Engineering, Gansu Agricultural University, Lanzhou, China
| | - Dov B. Prusky
- College of Food Science and Engineering, Gansu Agricultural University, Lanzhou, China
- Institute of Postharvest and Food Sciences, Agricultural Research Organization Volcani Center Information Center, Rishon LeZion, Israel
| |
Collapse
|
2
|
Li M, Tang S, Peng X, Sharma G, Yin S, Hao Z, Li J, Shen J, Dai C. Lycopene as a Therapeutic Agent against Aflatoxin B1-Related Toxicity: Mechanistic Insights and Future Directions. Antioxidants (Basel) 2024; 13:452. [PMID: 38671900 PMCID: PMC11047733 DOI: 10.3390/antiox13040452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2024] [Revised: 03/28/2024] [Accepted: 04/03/2024] [Indexed: 04/28/2024] Open
Abstract
Aflatoxin (AFT) contamination poses a significant global public health and safety concern, prompting widespread apprehension. Of the various AFTs, aflatoxin B1 (AFB1) stands out for its pronounced toxicity and its association with a spectrum of chronic ailments, including cardiovascular disease, neurodegenerative disorders, and cancer. Lycopene, a lipid-soluble natural carotenoid, has emerged as a potential mitigator of the deleterious effects induced by AFB1 exposure, spanning cardiac injury, hepatotoxicity, nephrotoxicity, intestinal damage, and reproductive impairment. This protective mechanism operates by reducing oxidative stress, inflammation, and lipid peroxidation, and activating the mitochondrial apoptotic pathway, facilitating the activation of mitochondrial biogenesis, the endogenous antioxidant system, and the nuclear factor erythroid 2-related factor 2 (Nrf2)/kelch-like ECH-associated protein 1 (KEAP1) and peroxisome proliferator-activated receptor-γ coactivator-1 (PGC-1) pathways, as well as regulating the activities of cytochrome P450 (CYP450) enzymes. This review provides an overview of the protective effects of lycopene against AFB1 exposure-induced toxicity and the underlying molecular mechanisms. Furthermore, it explores the safety profile and potential clinical applications of lycopene. The present review underscores lycopene's potential as a promising detoxification agent against AFB1 exposure, with the intent to stimulate further research and practical utilization in this domain.
Collapse
Affiliation(s)
- Meng Li
- National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China; (M.L.); (S.T.); (S.Y.); (Z.H.)
| | - Shusheng Tang
- National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China; (M.L.); (S.T.); (S.Y.); (Z.H.)
| | - Xinyan Peng
- College of Life Sciences, Yantai University, Yantai 264000, China;
| | - Gaurav Sharma
- Cardiovascular and Thoracic Surgery, Advanced Imaging Research Center, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA;
| | - Shutao Yin
- National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China; (M.L.); (S.T.); (S.Y.); (Z.H.)
| | - Zhihui Hao
- National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China; (M.L.); (S.T.); (S.Y.); (Z.H.)
| | - Jichang Li
- College of Veterinary Medicine, Northeast Agricultural University, 600 Changjiang Road, Xiangfang District, Harbin 150030, China;
| | - Jianzhong Shen
- National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China; (M.L.); (S.T.); (S.Y.); (Z.H.)
| | - Chongshan Dai
- National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China; (M.L.); (S.T.); (S.Y.); (Z.H.)
| |
Collapse
|
3
|
Integrated Transcriptome Analysis Reveals mRNA-miRNA Pathway Crosstalk in Roman Laying Hens' Immune Organs Induced by AFB1. Toxins (Basel) 2022; 14:toxins14110808. [PMID: 36422982 PMCID: PMC9693605 DOI: 10.3390/toxins14110808] [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: 10/20/2022] [Revised: 11/03/2022] [Accepted: 11/08/2022] [Indexed: 11/22/2022] Open
Abstract
Aflatoxin B1 (AFB1) is a widely distributed contaminant in moldy corn, rice, soybean, and oil crops. Many studies have revealed its adverse effects, such as carcinogenicity, immunotoxicity, and hepatotoxicity, on the health of humans and animals. To investigate the immunotoxic effects on chicken immune organs induced by AFB1, we integrated RNA and small-RNA sequencing data of the spleen and the bursa of Fabricius to elucidate the response of the differentially expressed transcriptional profiles and related pathways. AFB1 consumption negatively influenced egg quality, but no obvious organ damage was observed compared to that of the control group. We identified 3918 upregulated and 2415 downregulated genes in the spleen and 231 upregulated and 65 downregulated genes in the bursa of Fabricius. We confirmed that several core genes related to immune and metabolic pathways were activated by AFB1. Furthermore, 42 and 19 differentially expressed miRNAs were found in the spleen and the bursa of Fabricius, respectively. Differentially expressed genes and target genes of differentially expressed miRNAs were mainly associated with cancer progression and immune response. The predicted mRNA-miRNA pathway network illustrated the potential regulatory mechanisms. The present study identified the transcriptional profiles and revealed potential mRNA-miRNA pathway crosstalk. This genetic regulatory network will facilitate the understanding of the immunotoxicity mechanisms of chicken immune organs induced by high concentrations of AFB1.
Collapse
|
4
|
Yalçin SS, Güneş B, Yalçin S. Influence of season and lactational stage on aflatoxin M1 and ochratoxin A in human milk in a cohort study from southeastern region of Turkey. INTERNATIONAL JOURNAL OF ENVIRONMENTAL HEALTH RESEARCH 2022; 32:1192-1203. [PMID: 33307760 DOI: 10.1080/09603123.2020.1860200] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2020] [Accepted: 12/02/2020] [Indexed: 06/12/2023]
Abstract
The aim was to evaluate the changes in aflatoxin M1 (AFM1) and ochratoxin A (OTA) levels in human breast milk (HBM) during the first five postpartum months according to the sampling season in a cohort study from Şanlıurfa. From 78 healthy lactating mothers, HBM was taken at the 5-14 days postpartum (D5-14) and the 6th and 18th weeks postpartum (W6 and W18). Mycotoxin levels were analyzed with competitive ELISA. Generalized Estimating Equations with repeated measures (three-correlation matrix dimension) revealed a significantly higher mean AFM1 level at W6 than that on D5-14. AFM1 and OTA levels in winter and spring were considerably higher than that in summer and autumn. Maternal smoke exposure, body mass index, history of moldy food exposure, birth order, and breastfeeding type did not influence the results. Whilst season had a marked effect on the milk levels of both analytes, lactation stage affected AFM1 more notable than OTA.
Collapse
Affiliation(s)
| | - Bülent Güneş
- Child Health and Disease Service, Özel Şan Med Hospital, Şanlıurfa, Turkey
| | - Suzan Yalçin
- Department of Food Hygiene and Technology, Faculty of Veterinary Medicine, Selçuk University, Konya, Turkey
| |
Collapse
|
5
|
Kaminski TFA, Dalla Lana DF, Quintana LD, Schmitt EG, Kaminski TA, Paula FR, Fuentefria AM, Machado MM, Souza de Oliveira LF. Fumonisin B 1 induces toxicity in human leukocytes at low concentrations: Are computational studies effective to determine biosafety? Toxicon 2020; 182:7-12. [PMID: 32376361 DOI: 10.1016/j.toxicon.2020.04.100] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Revised: 04/14/2020] [Accepted: 04/24/2020] [Indexed: 11/19/2022]
Abstract
Fumonisin B1 is a mycotoxin produced by Fusarium verticillioides and Fusarium proliferatum found in various crops, particularly maize. Besides carcinogenicity, other manifestations have been registered in different animals and in humans. In the case of humans, epidemiological studies have reported high prevalence of esophageal cancer in populations exposed to fumonisins. This study aimed to evaluate the minimum concentration of FB1 capable of inducing cytotoxicity (cell viability test), genotoxicity (comet assay) and mutagenicity (micronucleus) in cultured human leukocytes and to evaluate the effectiveness of in silico tests to predict FB1 toxicity. All concentrations analyzed (200; 100; 50; 5; 0.5; 0.05; 0.005 μg/mL and 300; 30; 3; 1; 0.1; 0.01 fg/mL) except the lowest demonstrated dose-dependent toxicity in all parameters analyzed (p < 0.05 to p < 0.0001). As for predictions, only the Lazar software showed carcinogenicity of FB1 for rats. Thus, it is evident that FB1 is able to induce dose-dependent damage at low concentrations, and that computational tests, although desirable for prediction, are not effective as biological tests to determine toxicity, at least of FB 1 and within the experimental conditions tested.
Collapse
Affiliation(s)
| | - Daiane Flores Dalla Lana
- Programa de Pós-Graduação em Patologia, Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre, RS, Brazil
| | | | | | | | - Favero Reisdorfer Paula
- Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal do Pampa, Uruguaiana, RS, Brazil
| | | | - Michel Mansur Machado
- Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal do Pampa, Uruguaiana, RS, Brazil
| | | |
Collapse
|