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Duan M, Yu C, Yang Y, Fu Z, Liu C, Du J, Li M, Guo S, Yu X, Xu G, Mei Y, Wang L. Establishing a novel and sensitive assay for bioactivity determination of anti-CD25 antibodies. Heliyon 2023; 9:e17401. [PMID: 37416689 PMCID: PMC10320283 DOI: 10.1016/j.heliyon.2023.e17401] [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: 01/17/2023] [Revised: 06/15/2023] [Accepted: 06/15/2023] [Indexed: 07/08/2023] Open
Abstract
Anti-CD25 antibodies have been approved for renal transplantation and has been used prior to and during transplantation by the Food and Drug Administration (FDA). However, no reported bioassays have been reflected the mechanism of action (MOA) of anti-CD25 antibodies. Here, we describe the development and validation of a reporter gene assay (RGA) based on the engineered C8166-STAT5RE-Luc cells expressing endogenous IL-2 receptors and a STAT5-inducible element-driven firefly luciferase in C8166 cell lines. The RGA was fully validated according to the International Conference on the Harmonization of Technical Requirements for the Registration of Pharmaceuticals for the Human Use-Q2 (ICH-Q2). After optimization, the assay showed excellent specificity, linearity, accuracy, precision, and robustness. Due to the MOA relatedness and the excellent assay performance, the RGA is suitable for exploring the critical quality attributes (CQAs), release inspection, comparability and stability of anti-CD25 mAbs.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | - Lan Wang
- Corresponding author. Division of Monoclonal Antibody Products, National Institutes for Food and Drug Control, 31# HUATUO Road, Beijing 102629, China.
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Ouyang Y, Zhong X, Liao H, Zhu P, Luo K, Zhu H. A New Method for Screening Natural Products to Stimulate IFN-γ Production in Jurkat Human T Lymphocytes. SLAS DISCOVERY 2020; 26:130-139. [PMID: 32441185 DOI: 10.1177/2472555220922475] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Interferon-γ (IFN-γ) is a critical cytokine in the defense against viral and bacterial infection. It is mainly produced by natural killer cells and activated T cells. Given its regulatory role in coordinating cellular and humoral immune responses, IFN-γ is considered to be an effective therapeutic agent in the treatment of viral infection. Here we established a fluorescence-based high-content screening model to find small molecules that can stimulate the production of IFN-γ in human Jurkat cells. After a primary screening of 267 natural products, two hits, Astragalus polyphenols and 6-shogaol, were identified to promote the activity of the IFN-γ promoter and subsequently validated by the flow cytometry assay. Obviously, both Astragalus polyphenols and 6-shogaol exhibited potential to induce the transcription and expression of IFN-γ in a dose-dependent manner. These results indicated that our high-content screening model could be a credible and useful platform to contribute to the discovery of novel molecules to promote the expression of IFN-γ and provide leading compounds for the treatment of viral infectious diseases.
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Affiliation(s)
- Yan Ouyang
- Neonatal/Pediatric Intensive Care Unit, Children's Medical Center, First Affiliated Hospital of Gannan Medical University, Ganzhou, China.,Institute of Pediatrics Medicine, Children's Medical Center, First Affiliated Hospital of Gannan Medical University, Ganzhou, China
| | - Xiaoming Zhong
- Neonatal/Pediatric Intensive Care Unit, Children's Medical Center, First Affiliated Hospital of Gannan Medical University, Ganzhou, China
| | - Hongqun Liao
- Neonatal/Pediatric Intensive Care Unit, Children's Medical Center, First Affiliated Hospital of Gannan Medical University, Ganzhou, China
| | - Pengcheng Zhu
- Institute of Pediatrics Medicine, Children's Medical Center, First Affiliated Hospital of Gannan Medical University, Ganzhou, China
| | - Kaiyuan Luo
- Neonatal/Pediatric Intensive Care Unit, Children's Medical Center, First Affiliated Hospital of Gannan Medical University, Ganzhou, China.,Institute of Pediatrics Medicine, Children's Medical Center, First Affiliated Hospital of Gannan Medical University, Ganzhou, China.,Pediatric Internal Medicine, Children's Medical Center, First Affiliated Hospital of Gannan Medical University, Ganzhou, China
| | - Huifang Zhu
- Neonatal/Pediatric Intensive Care Unit, Children's Medical Center, First Affiliated Hospital of Gannan Medical University, Ganzhou, China.,Institute of Pediatrics Medicine, Children's Medical Center, First Affiliated Hospital of Gannan Medical University, Ganzhou, China
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