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Liu F, Zhao Q, Jia Z, Song C, Huang Y, Ma H, Song S. N-3-oxo-octanoyl-homoserine lactone-mediated priming of resistance to Pseudomonas syringae requires the salicylic acid signaling pathway in Arabidopsis thaliana. BMC PLANT BIOLOGY 2020; 20:38. [PMID: 31992205 PMCID: PMC6986161 DOI: 10.1186/s12870-019-2228-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2019] [Accepted: 12/30/2019] [Indexed: 05/06/2023]
Abstract
BACKGROUD Many Gram-negative bacteria use N-acyl-homoserine lactones (AHLs) to communicate each other and to coordinate their collective behaviors. Recently, accumulating evidence shows that host plants are able to sense and respond to bacterial AHLs. Once primed, plants are in an altered state that enables plant cells to more quickly and/or strongly respond to subsequent pathogen infection or abiotic stress. RESULTS In this study, we report that pretreatment with N-3-oxo-octanoyl-homoserine lactone (3OC8-HSL) confers resistance against the pathogenic bacterium Pseudomonas syringae pv. tomato DC3000 (PstDC3000) in Arabidopsis. Pretreatment with 3OC8-HSL and subsequent pathogen invasion triggered an augmented burst of hydrogen peroxide, salicylic acid accumulation, and fortified expression of the pathogenesis-related genes PR1 and PR5. Upon PstDC3000 challenge, plants treated with 3OC8-HSL showed increased activities of defense-related enzymes including peroxidase, catalase, phenylalanine ammonialyase, and superoxide dismutase. In addition, the 3OC8-HSL-primed resistance to PstDC3000 in wild-type plants was impaired in plants expressing the bacterial NahG gene and in the npr1 mutant. Moreover, the expression levels of isochorismate synthases (ICS1), a critical salicylic acid biosynthesis enzyme, and two regulators of its expression, SARD1 and CBP60g, were potentiated by 3OC8-HSL pretreatment followed by pathogen inoculation. CONCLUSIONS Our data indicate that 3OC8-HSL primes the Arabidopsis defense response upon hemibiotrophic bacterial infection and that 3OC8-HSL-primed resistance is dependent on the SA signaling pathway. These findings may help establish a novel strategy for the control of plant disease.
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Affiliation(s)
- Fang Liu
- Biology Institute, Hebei Academy of Sciences, 46th South Street of Friendship, Shijiazhuang, 050051, China
- Hebei Engineering and Technology Center of Microbiological Control on Main Crop Disease, 46th South Street of Friendship, Shijiazhuang, 050051, China
| | - Qian Zhao
- Biology Institute, Hebei Academy of Sciences, 46th South Street of Friendship, Shijiazhuang, 050051, China
- Hebei Engineering and Technology Center of Microbiological Control on Main Crop Disease, 46th South Street of Friendship, Shijiazhuang, 050051, China
| | - Zhenhua Jia
- Biology Institute, Hebei Academy of Sciences, 46th South Street of Friendship, Shijiazhuang, 050051, China.
- Hebei Engineering and Technology Center of Microbiological Control on Main Crop Disease, 46th South Street of Friendship, Shijiazhuang, 050051, China.
| | - Cong Song
- Biology Institute, Hebei Academy of Sciences, 46th South Street of Friendship, Shijiazhuang, 050051, China
- Hebei Engineering and Technology Center of Microbiological Control on Main Crop Disease, 46th South Street of Friendship, Shijiazhuang, 050051, China
| | - Yali Huang
- Biology Institute, Hebei Academy of Sciences, 46th South Street of Friendship, Shijiazhuang, 050051, China
- Hebei Engineering and Technology Center of Microbiological Control on Main Crop Disease, 46th South Street of Friendship, Shijiazhuang, 050051, China
| | - Hong Ma
- Biology Institute, Hebei Academy of Sciences, 46th South Street of Friendship, Shijiazhuang, 050051, China
- Hebei Engineering and Technology Center of Microbiological Control on Main Crop Disease, 46th South Street of Friendship, Shijiazhuang, 050051, China
| | - Shuishan Song
- Biology Institute, Hebei Academy of Sciences, 46th South Street of Friendship, Shijiazhuang, 050051, China.
- Hebei Engineering and Technology Center of Microbiological Control on Main Crop Disease, 46th South Street of Friendship, Shijiazhuang, 050051, China.
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Chiba A, Bawaneh A, Velazquez C, Clear KY, Wilson AS, Howard-McNatt M, Levine EA, Levi-Polyachenko N, Yates-Alston SA, Diggle SP, Soto-Pantoja DR, Cook KL. Neoadjuvant Chemotherapy Shifts Breast Tumor Microbiota Populations to Regulate Drug Responsiveness and the Development of Metastasis. Mol Cancer Res 2019; 18:130-139. [DOI: 10.1158/1541-7786.mcr-19-0451] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2019] [Revised: 08/26/2019] [Accepted: 10/15/2019] [Indexed: 11/16/2022]
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Kadam S, Shai S, Shahane A, Kaushik KS. Recent Advances in Non-Conventional Antimicrobial Approaches for Chronic Wound Biofilms: Have We Found the 'Chink in the Armor'? Biomedicines 2019; 7:biomedicines7020035. [PMID: 31052335 PMCID: PMC6631124 DOI: 10.3390/biomedicines7020035] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2019] [Revised: 04/27/2019] [Accepted: 04/28/2019] [Indexed: 12/19/2022] Open
Abstract
Chronic wounds are a major healthcare burden, with huge public health and economic impact. Microbial infections are the single most important cause of chronic, non-healing wounds. Chronic wound infections typically form biofilms, which are notoriously recalcitrant to conventional antibiotics. This prompts the need for alternative or adjunct ‘anti-biofilm’ approaches, notably those that account for the unique chronic wound biofilm microenvironment. In this review, we discuss the recent advances in non-conventional antimicrobial approaches for chronic wound biofilms, looking beyond standard antibiotic therapies. These non-conventional strategies are discussed under three groups. The first group focuses on treatment approaches that directly kill or inhibit microbes in chronic wound biofilms, using mechanisms or delivery strategies distinct from antibiotics. The second group discusses antimicrobial approaches that modify the biological, chemical or biophysical parameters in the chronic wound microenvironment, which in turn enables the disruption and removal of biofilms. Finally, therapeutic approaches that affect both, biofilm bacteria and microenvironment factors, are discussed. Understanding the advantages and limitations of these recent approaches, their stage of development and role in biofilm management, could lead to new treatment paradigms for chronic wound infections. Towards this end, we discuss the possibility that non-conventional antimicrobial therapeutics and targets could expose the ‘chink in the armor’ of chronic wound biofilms, thereby providing much-needed alternative or adjunct strategies for wound infection management.
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Affiliation(s)
- Snehal Kadam
- Ramalingaswami Re-entry Fellowship, Department of Biotechnology, Pune 411045, India.
| | - Saptarsi Shai
- Poona College of Pharmacy, Bharati Vidyapeeth Deemed (to be) University, Erandwane, Pune 411038, India.
| | - Aditi Shahane
- Poona College of Pharmacy, Bharati Vidyapeeth Deemed (to be) University, Erandwane, Pune 411038, India.
| | - Karishma S Kaushik
- Ramalingaswami Re-entry Fellowship, Department of Biotechnology, Pune 411045, India.
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Roussel L, Rousseau S. Exposure of airway epithelial cells to Pseudomonas aeruginosa biofilm-derived quorum sensing molecules decrease the activity of the anti-oxidant response element bound by NRF2. Biochem Biophys Res Commun 2017; 483:829-833. [DOI: 10.1016/j.bbrc.2017.01.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Accepted: 01/03/2017] [Indexed: 12/11/2022]
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