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Cheng Y, Liu Y, Xu D, Zhang D, Yang Y, Miao Y, He S, Xu Q, Li E. An engineered TNFR1-selective human lymphotoxin-alpha mutant delivered by an oncolytic adenovirus for tumor immunotherapy. Biochim Biophys Acta Mol Basis Dis 2024; 1870:167122. [PMID: 38492783 DOI: 10.1016/j.bbadis.2024.167122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 02/25/2024] [Accepted: 03/10/2024] [Indexed: 03/18/2024]
Abstract
Lymphotoxin α (LTα) is a soluble factor produced by activated lymphocytes which is cytotoxic to tumor cells. Although a promising candidate in cancer therapy, the application of recombinant LTα has been limited by its instability and toxicity by systemic administration. Secreted LTα interacts with several distinct receptors for its biological activities. Here, we report a TNFR1-selective human LTα mutant (LTα Q107E) with potent antitumor activity. Recombinant LTα Q107E with N-terminal 23 and 27 aa deletion (named LTα Q1 and Q2, respectively) showed selectivity to TNFR1 in both binding and NF-κB pathway activation assays. To test the therapeutic potential, we constructed an oncolytic adenovirus (oAd) harboring LTα Q107E Q2 mutant (named oAdQ2) and assessed the antitumor effect in mouse xenograft models. Intratumoral delivery of oAdQ2 inhibited tumor growth. In addition, oAdQ2 treatment enhanced T cell and IFNγ-positive CD8 T lymphocyte infiltration in a human PBMC reconstituted-SCID mouse xenograft model. This study provides evidence that reengineering of bioactive cytokines with tissue or cell specific properties may potentiate their therapeutic potential of cytokines with multiple receptors.
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Affiliation(s)
- Yan Cheng
- State Key Laboratory of Pharmaceutical Biotechnology, Medical School, Nanjing University, China; Jiangsu Key Laboratory of Molecular Medicine, Medical School, Nanjing University, China
| | - Yu Liu
- Department of Oncology, Shanghai Tenth People's Hospital, Shanghai, China
| | - Dongge Xu
- State Key Laboratory of Pharmaceutical Biotechnology, Medical School, Nanjing University, China; Jiangsu Key Laboratory of Molecular Medicine, Medical School, Nanjing University, China
| | - Dan Zhang
- Jiangsu Key Laboratory of Molecular Medicine, Medical School, Nanjing University, China
| | - Yang Yang
- Shanghai Baoyuan Pharmaceutical Co., Ltd, Shanghai, China
| | - Yuqing Miao
- The Affiliated Yancheng First People's Hospital, Medical School, Nanjing University, Yancheng, China
| | - Susu He
- State Key Laboratory of Pharmaceutical Biotechnology, Medical School, Nanjing University, China; Jiangsu Key Laboratory of Molecular Medicine, Medical School, Nanjing University, China; The Affiliated Yancheng First People's Hospital, Medical School, Nanjing University, Yancheng, China
| | - Qing Xu
- Department of Oncology, Shanghai Tenth People's Hospital, Shanghai, China; Department of Medical Oncology, Shanghai Tenth People's Hospital, Tongji University Cancer Center, School of Medicine, Tongji University, Shanghai, China.
| | - Erguang Li
- State Key Laboratory of Pharmaceutical Biotechnology, Medical School, Nanjing University, China; Jiangsu Key Laboratory of Molecular Medicine, Medical School, Nanjing University, China; Department of Oncology, Shanghai Tenth People's Hospital, Shanghai, China.
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Nadarajapillai K, Jung S, Sellaththurai S, Ganeshalingam S, Kim MJ, Lee J. CRISPR/Cas9-mediated knockout of tnf-α1 in zebrafish reduces disease resistance after Edwardsiella piscicida bacterial infection. FISH & SHELLFISH IMMUNOLOGY 2024; 144:109249. [PMID: 38040136 DOI: 10.1016/j.fsi.2023.109249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2023] [Revised: 11/09/2023] [Accepted: 11/23/2023] [Indexed: 12/03/2023]
Abstract
Tumor necrosis factor (TNF) is an important cytokine involved in immune responses to bacterial infections in vertebrates, including fish. Although Tnf-α is a well-studied cytokine, there are contradictory findings about Tnf-α function following bacterial infection. In this study, we analyzed the expression and function of the Tnf-α-type I isoform (Tnf-α1) in zebrafish by knockout experiments using the CRISPR/Cas9 gene-editing tool. The open reading frame of tnf-α1 encodes a 25.82 kDa protein with 234 amino acids (aa). The expression of tnf-α1 in the early stages of zebrafish was observed from the 2-cell stage. Adult zebrafish spleens showed the highest expression of tnf-α1. To evaluate the function of Tnf-α1, an 8 bp deletion in the target region, resulting in a short truncated protein of 55 aa, was used to create the tnf-α1 knockout mutant. The pattern of downstream gene expression in 7-day larvae in wild-type (WT) and tnf-α1 knockout fish was examined. We also verified the fish mortality rate after Edwardsiella piscicida challenge and found that it was much higher in tnf-α1 knockout fish than in WT fish. Additionally, downstream gene expression analyses after E. piscicida exposure revealed a distinct expression pattern in tnf-α1 knockout fish compared to that in WT fish. Overall, our study using tnf-α1 deletion in zebrafish confirmed that Tnf-α1 is critical for immune regulation during bacterial infection.
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Affiliation(s)
- Kishanthini Nadarajapillai
- Department of Marine Life Sciences & Fish Vaccine Research Center, Jeju National University, Jeju Self-Governing Province, 63243, Republic of Korea; Marine Science Institute, Jeju National University, Jeju Self-Governing Province, 63333, Republic of Korea
| | - Sumi Jung
- Department of Marine Life Sciences & Fish Vaccine Research Center, Jeju National University, Jeju Self-Governing Province, 63243, Republic of Korea; Marine Science Institute, Jeju National University, Jeju Self-Governing Province, 63333, Republic of Korea
| | - Sarithaa Sellaththurai
- Department of Marine Life Sciences & Fish Vaccine Research Center, Jeju National University, Jeju Self-Governing Province, 63243, Republic of Korea; Marine Science Institute, Jeju National University, Jeju Self-Governing Province, 63333, Republic of Korea
| | - Subothini Ganeshalingam
- Department of Marine Life Sciences & Fish Vaccine Research Center, Jeju National University, Jeju Self-Governing Province, 63243, Republic of Korea; Marine Science Institute, Jeju National University, Jeju Self-Governing Province, 63333, Republic of Korea
| | - Myoung-Jin Kim
- Nakdonggang National Institute of Biological Resources, Sangju-si, Gyeongsangbuk-do, 37242, Republic of Korea.
| | - Jehee Lee
- Department of Marine Life Sciences & Fish Vaccine Research Center, Jeju National University, Jeju Self-Governing Province, 63243, Republic of Korea; Marine Science Institute, Jeju National University, Jeju Self-Governing Province, 63333, Republic of Korea.
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Roy U. 3D Modeling of Tumor Necrosis Factor Receptor and Tumor Necrosis Factor-bound Receptor Systems. Mol Inform 2019; 38:e1800011. [PMID: 30632313 DOI: 10.1002/minf.201800011] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2018] [Accepted: 12/04/2018] [Indexed: 01/25/2023]
Abstract
The interactions between the tumor necrosis factor (TNF) and its receptor molecule are responsible for various signaling networks that are central to the functioning of human immune homeostasis. The present work is a computational study of certain structural aspects of this cell-signaling protein, specifically focusing on the molecular level analyses of the TNF receptor (TNF-R), guided by its crystallographic structure. We also examine the possible binding sites of the TNF onto TNF-R, and the associated interactions. The structural and conformational variations in the TNF-R and TNF bound TNF-R systems are examined in this context using molecular dynamics (MD) simulations. The time dependent variations of the dimeric TNF-R structures are compared with, and shown to be steadier than their isolated monomers. This dimeric stability is favored under acidic conditions. The results are used to further illustrate how 3D modeling and computer simulations can aid the structure-based approach to probing a ligand-receptor system.
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Affiliation(s)
- Urmi Roy
- Department of Chemistry & Biomolecular Science, Clarkson University, 8 Clarkson Avenue, Potsdam, NY, 13699-5820, United States
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Chandran A, Ghoshdastidar D, Senapati S. Groove binding mechanism of ionic liquids: a key factor in long-term stability of DNA in hydrated ionic liquids? J Am Chem Soc 2012. [PMID: 23181803 DOI: 10.1021/ja304519d] [Citation(s) in RCA: 130] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Nucleic acid sample storage is of paramount importance in biotechnology and forensic sciences. Very recently, hydrated ionic liquids (ILs) have been identified as ideal media for long-term DNA storage. Hence, understanding the binding characteristics and molecular mechanism of interactions of ILs with DNA is of both practical and fundamental interest. Here, we employ molecular dynamics simulations and spectroscopic experiments to unravel the key factors that stabilize DNA in hydrated ILs. Both simulation and experimental results show that DNA maintains the native B-conformation in ILs. Simulation results further suggest that, apart from the electrostatic association of IL cations with the DNA backbone, groove binding of IL cations through hydrophobic and polar interactions contributes significantly to DNA stability. Circular dichroism spectral measurements and fluorescent dye displacement assay confirm the intrusion of IL molecules into the DNA minor groove. Very interestingly, the IL ions were seen to disrupt the water cage around DNA, including the spine of hydration in the minor groove. This partial dehydration by ILs likely prevents the hydrolytic reactions that denature DNA and helps stabilize DNA for the long term. The detailed understanding of IL-DNA interactions provided here could guide the future development of novel ILs, specific for nucleic acid solutes.
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Affiliation(s)
- Aneesh Chandran
- Department of Biotechnology, Indian Institute of Technology Madras, Chennai 600036, India
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