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Meng JH, Huang YB, Long J, Cai QC, Qiao X, Zhang QL, Zhang LD, Yan X, Jing R, Liu XS, Zhou SJ, Yuan YS, Yin-Chen Ma, Zhou LX, Peng NN, Li XC, Cai CH, Tang HM, Martins AF, Jiang JX, Kai-Jun Luo. Innexin hemichannel activation by Microplitis bicoloratus ecSOD monopolymer reduces ROS. iScience 2024; 27:109469. [PMID: 38577101 PMCID: PMC10993139 DOI: 10.1016/j.isci.2024.109469] [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: 07/14/2023] [Revised: 01/31/2024] [Accepted: 03/07/2024] [Indexed: 04/06/2024] Open
Abstract
The extracellular superoxide dismutases (ecSODs) secreted by Microplitis bicoloratus reduce the reactive oxygen species (ROS) stimulated by the Microplitis bicoloratus bracovirus. Here, we demonstrate that the bacterial transferase hexapeptide (hexapep) motif and bacterial-immunoglobulin-like (BIg-like) domain of ecSODs bind to the cell membrane and transiently open hemichannels, facilitating ROS reductions. RNAi-mediated ecSOD silencing in vivo elevated ROS in host hemocytes, impairing parasitoid larva development. In vitro, the ecSOD-monopolymer needed to be membrane bound to open hemichannels. Furthermore, the hexapep motif in the beta-sandwich of ecSOD49 and ecSOD58, and BIg-like domain in the signal peptides of ecSOD67 were required for cell membrane binding. Hexapep motif and BIg-like domain deletions induced ecSODs loss of adhesion and ROS reduction failure. The hexapep motif and BIg-like domain mediated ecSOD binding via upregulating innexins and stabilizing the opened hemichannels. Our findings reveal a mechanism through which ecSOD reduces ROS, which may aid in developing anti-redox therapy.
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Affiliation(s)
- Jiang-Hui Meng
- School of Life Sciences, Yunnan University, Kunming, Yunnan 650500, P.R. China
- Yunnan International Joint Laboratory of Virology & Immunology, Kunming, Yunnan 650500, P.R. China
- Key Laboratory of the University in Yunnan Province for International Cooperation in Intercellular Communications and Regulations, Yunnan University, Kunming, Yunnan 650500, P.R. China
| | - Yong-Biao Huang
- School of Life Sciences, Yunnan University, Kunming, Yunnan 650500, P.R. China
- Yunnan International Joint Laboratory of Virology & Immunology, Kunming, Yunnan 650500, P.R. China
- Key Laboratory of the University in Yunnan Province for International Cooperation in Intercellular Communications and Regulations, Yunnan University, Kunming, Yunnan 650500, P.R. China
| | - Jin Long
- School of Life Sciences, Yunnan University, Kunming, Yunnan 650500, P.R. China
- Yunnan International Joint Laboratory of Virology & Immunology, Kunming, Yunnan 650500, P.R. China
- Key Laboratory of the University in Yunnan Province for International Cooperation in Intercellular Communications and Regulations, Yunnan University, Kunming, Yunnan 650500, P.R. China
| | - Qiu-Chen Cai
- Werner Siemens Imaging Center, Department of Preclinical Imaging and Radiopharmacy, Eberhard Karls University Tübingen, 72076 Tübingen, Germany
- Cluster of Excellence iFIT (EXC 2180) “Image-Guided and Functionally Instructed Tumor Therapies”, University of Tuebingen, 72076 Tübingen, Germany
| | - Xin Qiao
- School of Life Sciences, Yunnan University, Kunming, Yunnan 650500, P.R. China
- Yunnan International Joint Laboratory of Virology & Immunology, Kunming, Yunnan 650500, P.R. China
- Key Laboratory of the University in Yunnan Province for International Cooperation in Intercellular Communications and Regulations, Yunnan University, Kunming, Yunnan 650500, P.R. China
| | - Qiong-Li Zhang
- School of Life Sciences, Yunnan University, Kunming, Yunnan 650500, P.R. China
- Yunnan International Joint Laboratory of Virology & Immunology, Kunming, Yunnan 650500, P.R. China
- Key Laboratory of the University in Yunnan Province for International Cooperation in Intercellular Communications and Regulations, Yunnan University, Kunming, Yunnan 650500, P.R. China
| | - Li-Dan Zhang
- Department of Biochemistry and Structural Biology, University of Texas Health Science Center, San Antonio, TX 78229, USA
| | - Xiang Yan
- School of Life Sciences, Yunnan University, Kunming, Yunnan 650500, P.R. China
- Yunnan International Joint Laboratory of Virology & Immunology, Kunming, Yunnan 650500, P.R. China
- Key Laboratory of the University in Yunnan Province for International Cooperation in Intercellular Communications and Regulations, Yunnan University, Kunming, Yunnan 650500, P.R. China
| | - Rui Jing
- School of Life Sciences, Yunnan University, Kunming, Yunnan 650500, P.R. China
- Yunnan International Joint Laboratory of Virology & Immunology, Kunming, Yunnan 650500, P.R. China
- Key Laboratory of the University in Yunnan Province for International Cooperation in Intercellular Communications and Regulations, Yunnan University, Kunming, Yunnan 650500, P.R. China
| | - Xing-Shan Liu
- School of Life Sciences, Yunnan University, Kunming, Yunnan 650500, P.R. China
- Yunnan International Joint Laboratory of Virology & Immunology, Kunming, Yunnan 650500, P.R. China
- Key Laboratory of the University in Yunnan Province for International Cooperation in Intercellular Communications and Regulations, Yunnan University, Kunming, Yunnan 650500, P.R. China
| | - Sai-Jun Zhou
- School of Life Sciences, Yunnan University, Kunming, Yunnan 650500, P.R. China
- Yunnan International Joint Laboratory of Virology & Immunology, Kunming, Yunnan 650500, P.R. China
- Key Laboratory of the University in Yunnan Province for International Cooperation in Intercellular Communications and Regulations, Yunnan University, Kunming, Yunnan 650500, P.R. China
| | - Yong-Sheng Yuan
- School of Life Sciences, Yunnan University, Kunming, Yunnan 650500, P.R. China
- Yunnan International Joint Laboratory of Virology & Immunology, Kunming, Yunnan 650500, P.R. China
- Key Laboratory of the University in Yunnan Province for International Cooperation in Intercellular Communications and Regulations, Yunnan University, Kunming, Yunnan 650500, P.R. China
| | - Yin-Chen Ma
- School of Life Sciences, Yunnan University, Kunming, Yunnan 650500, P.R. China
- Yunnan International Joint Laboratory of Virology & Immunology, Kunming, Yunnan 650500, P.R. China
- Key Laboratory of the University in Yunnan Province for International Cooperation in Intercellular Communications and Regulations, Yunnan University, Kunming, Yunnan 650500, P.R. China
| | - Li-Xiang Zhou
- School of Life Sciences, Yunnan University, Kunming, Yunnan 650500, P.R. China
- Yunnan International Joint Laboratory of Virology & Immunology, Kunming, Yunnan 650500, P.R. China
- Key Laboratory of the University in Yunnan Province for International Cooperation in Intercellular Communications and Regulations, Yunnan University, Kunming, Yunnan 650500, P.R. China
| | - Nan-Nan Peng
- School of Life Sciences, Yunnan University, Kunming, Yunnan 650500, P.R. China
- Yunnan International Joint Laboratory of Virology & Immunology, Kunming, Yunnan 650500, P.R. China
- Key Laboratory of the University in Yunnan Province for International Cooperation in Intercellular Communications and Regulations, Yunnan University, Kunming, Yunnan 650500, P.R. China
| | - Xing-Cheng Li
- School of Life Sciences, Yunnan University, Kunming, Yunnan 650500, P.R. China
- Yunnan International Joint Laboratory of Virology & Immunology, Kunming, Yunnan 650500, P.R. China
- Key Laboratory of the University in Yunnan Province for International Cooperation in Intercellular Communications and Regulations, Yunnan University, Kunming, Yunnan 650500, P.R. China
| | - Cheng-Hui Cai
- School of Life Sciences, Yunnan University, Kunming, Yunnan 650500, P.R. China
- Yunnan International Joint Laboratory of Virology & Immunology, Kunming, Yunnan 650500, P.R. China
- Key Laboratory of the University in Yunnan Province for International Cooperation in Intercellular Communications and Regulations, Yunnan University, Kunming, Yunnan 650500, P.R. China
| | - Hong-Mei Tang
- School of Life Sciences, Yunnan University, Kunming, Yunnan 650500, P.R. China
- Yunnan International Joint Laboratory of Virology & Immunology, Kunming, Yunnan 650500, P.R. China
- Key Laboratory of the University in Yunnan Province for International Cooperation in Intercellular Communications and Regulations, Yunnan University, Kunming, Yunnan 650500, P.R. China
| | - André F. Martins
- Werner Siemens Imaging Center, Department of Preclinical Imaging and Radiopharmacy, Eberhard Karls University Tübingen, 72076 Tübingen, Germany
- Cluster of Excellence iFIT (EXC 2180) “Image-Guided and Functionally Instructed Tumor Therapies”, University of Tuebingen, 72076 Tübingen, Germany
| | - Jean X. Jiang
- Department of Biochemistry and Structural Biology, University of Texas Health Science Center, San Antonio, TX 78229, USA
| | - Kai-Jun Luo
- School of Life Sciences, Yunnan University, Kunming, Yunnan 650500, P.R. China
- Yunnan International Joint Laboratory of Virology & Immunology, Kunming, Yunnan 650500, P.R. China
- Key Laboratory of the University in Yunnan Province for International Cooperation in Intercellular Communications and Regulations, Yunnan University, Kunming, Yunnan 650500, P.R. China
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Shenmar K, Sharma KK, Wangoo N, Maurya IK, Kumar V, Khan SI, Jacob MR, Tikoo K, Jain R. Synthesis, stability and mechanistic studies of potent anticryptococcal hexapeptides. Eur J Med Chem 2017; 132:192-203. [PMID: 28363154 DOI: 10.1016/j.ejmech.2017.03.046] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2017] [Revised: 02/14/2017] [Accepted: 03/22/2017] [Indexed: 01/04/2023]
Abstract
The growing incidents of cryptococcosis in immuno-compromised patients have created a need for novel drug therapies capable of eradicating the disease. The peptide-based drug therapy offers many advantages over the traditional therapeutic agents, which has been exploited in the present study by synthesizing a series of hexapeptides that exhibits promising activity against a panel of Gram-negative and Gram-positive bacteria and various pathogenic fungal strains; the most exemplary activity was observed against Cryptococcus neoformans. The peptides 3, 24, 32 and 36 displayed potent anticryptococcal activity (IC50 = 0.4-0.46 μg/mL, MIC = 0.63-1.25 μg/mL, MFC = 0.63-1.25 μg/mL), and stability under proteolytic conditions. Besides this, several other peptides displayed promising inhibition of pathogenic bacteria. The prominent ones include peptides 18-20, and 26 that exhibited IC50 values ranged between 2.1 and 3.6 μg/mL, MICs of 5-20 μg/mL and MBCs of 10-20 μg/mL against Staphylococcus aureus and methicillin-resistant S. aureus. The detailed mechanistic study on selected peptides demonstrated absolute selectivity towards the bacterial membranes and fungal cells by causing perturbations in the cell membranes, confirmed by the scanning electron microscopy and transmission electron microscopy studies.
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Affiliation(s)
- Kitika Shenmar
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research, Sector 67, S. A. S. Nagar, Punjab, 160 062, India
| | - Krishna K Sharma
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research, Sector 67, S. A. S. Nagar, Punjab, 160 062, India
| | - Nishima Wangoo
- Department of Applied Sciences, University Institute of Engineering and Technology (U.I.E.T.), Panjab University, Sector-25, Chandigarh, 160014, India
| | - Indresh K Maurya
- Department of Microbial Biotechnology, Panjab University, Sector-14, Chandigarh, 160014, India
| | - Vinod Kumar
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research, Sector 67, S. A. S. Nagar, Punjab, 160 062, India
| | - Shabana I Khan
- National Center for Natural Products Research, School of Pharmacy, The University of Mississippi, University, MS 38677, USA
| | - Melissa R Jacob
- National Center for Natural Products Research, School of Pharmacy, The University of Mississippi, University, MS 38677, USA
| | - Kulbhushan Tikoo
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research, Sector 67, S. A. S. Nagar, Punjab, 160 062, India
| | - Rahul Jain
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research, Sector 67, S. A. S. Nagar, Punjab, 160 062, India.
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