1
|
Lin Y, Liu Q, Chen Z, Zheng F, Huang H, Yu C, Yang J. The immunomodulatory effect of koumine on B cells under dependent and independent responses by T cells. Eur J Pharmacol 2022; 914:174690. [PMID: 34890543 DOI: 10.1016/j.ejphar.2021.174690] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2021] [Revised: 12/03/2021] [Accepted: 12/06/2021] [Indexed: 11/03/2022]
Abstract
Dysregulated activation of polyclonal B cells and production of pathogenic antibodies are involved in the development of rheumatoid arthritis (RA). Therefore, targeted B cell therapy is effective against RA. Gelsemium elegans (Gardn. & Champ.) Benth., a toxic plant widely distributed in Southeast Asia, has been used for treating rheumatoid pain, neuropathic pain, spasticity, skin ulcers, and cancers for many years in traditional Chinese medicine. Koumine, an alkaloid monomer from Gelsemium elegans Benth., exerts therapeutic effects against RA. However, whether koumine affects B cells remains unknown. In this study, the effect of koumine on B cells under T cell-independent (TI) and T cell-dependent (TD) immune responses is investigated in vitro and in vivo. Mouse primary B cells were obtained by immunomagnetic bead sorting, and immunomodulatory effects of koumine on the activation, proliferation, and differentiation of B cells were determined in TI and TD models induced by lipopolysaccharide (LPS) and anti-CD40 antibodies in vitro, respectively. The humoral immune responses of TI and TD were established using NP-AECM-FICOLL and NP-CGG in C57BL/6J mice, respectively. We found that koumine inhibited B cell differentiation in the TI model and inhibited B cell activation and proliferation in the TD model in vitro. Koumine also inhibited antibody secretion in TI immune response, TD initial immune response, and in TD secondary immune response. Our results reveal that koumine has a direct and indirect immune regulatory effect on B cells, showing that it can directly inhibit the differentiation and secretion of autoantibodies after abnormal activation of B cells, and indirectly inhibit the activation and proliferation of TD B cells to reduce the secretion of antibodies. It may be an important mechanism for its anti-RA effect in mice, providing a rationale and laboratory data support for the application of koumine in anti-human RA therapy.
Collapse
Affiliation(s)
- Yarong Lin
- Fujian Key Laboratory of Natural Medicine Pharmacology, School of Pharmacy, Fujian Medical University, Fuzhou, 350122, China
| | - Qian Liu
- Fujian Key Laboratory of Drug Target Discovery and Structural and Functional Research, School of Pharmacy, Fujian Medical University, Fuzhou, 350122, China
| | - Zehong Chen
- Laboratory of Medical Function, Basic Medical Experimental Teaching Center, School of Basic Medical Sciences, Fujian Medical University, Fuzhou, 350122, China
| | - Fengting Zheng
- Fujian Key Laboratory of Natural Medicine Pharmacology, School of Pharmacy, Fujian Medical University, Fuzhou, 350122, China
| | - Huihui Huang
- Fujian Key Laboratory of Drug Target Discovery and Structural and Functional Research, School of Pharmacy, Fujian Medical University, Fuzhou, 350122, China; Fujian Key Laboratory of Natural Medicine Pharmacology, School of Pharmacy, Fujian Medical University, Fuzhou, 350122, China
| | - Changxi Yu
- Department of Pharmacology, School of Pharmacy, Fujian Medical University, Fuzhou, 350122, China; Fujian Key Laboratory of Drug Target Discovery and Structural and Functional Research, School of Pharmacy, Fujian Medical University, Fuzhou, 350122, China; Fujian Key Laboratory of Natural Medicine Pharmacology, School of Pharmacy, Fujian Medical University, Fuzhou, 350122, China.
| | - Jian Yang
- Department of Pharmacology, School of Pharmacy, Fujian Medical University, Fuzhou, 350122, China; Fujian Key Laboratory of Natural Medicine Pharmacology, School of Pharmacy, Fujian Medical University, Fuzhou, 350122, China.
| |
Collapse
|
2
|
Peng X, Yang T, Liu G, Liu H, Peng Y, He L. Piperine ameliorated lupus nephritis by targeting AMPK-mediated activation of NLRP3 inflammasome. Int Immunopharmacol 2018; 65:448-457. [PMID: 30388519 DOI: 10.1016/j.intimp.2018.10.025] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Revised: 10/15/2018] [Accepted: 10/16/2018] [Indexed: 12/14/2022]
Abstract
BACKGROUND Lupus nephritis (LN) is a leading cause of mortality. The activation of NLRP3 inflammasome contributed to LN development and thus became a therapeutic target. Here we assessed the therapeutic potential of piperine, a bioactive compound known to target NLRP3 inflammasome, on LN development both in vivo and in vitro. METHODS LN was induced in BALB/c mice via intraperitoneal injection of pristane. Upon treatment with increasing doses of piperine, we assessed renal lesions, measured serum levels of pro-inflammatory cytokines, and examined expressions of key components of NLRP3 inflammasome in kidney. To explore the molecular mechanisms, we treated the proximal tubular epithelial HK-2 cells with lipopolysaccharide (LPS) and ATP, and examined the effects of piperine on pyroptosis and the activation of NLRP3 inflammasome. Furthermore, we assessed the significance of AMPK signaling in piperine functions in HK-2 cells. RESULTS In pristane-injected mice, piperine significantly ameliorated LN development in a dose-dependent manner, which was associated with the inhibition of NLRP3 inflammasome and the reduction of serum IL-1β, but not of IL-18 level. In HK-2 cells, piperine potently inhibited pyroptosis and the activation of NLRP3 inflammasome in response to LPS + ATP. The effects of piperine were mediated by blocking AMPK activation, and the AMPK agonist metformin bypassed the activities of piperine, and resumed pyroptosis as well as the activation on NLRP3 inflammasome. CONCLUSIONS By targeting AMPK, piperine significantly suppressed the activation of NLRP3 inflammasome, inhibited the release of pro-inflammatory cytokines, blocked the pyroptosis of tubular epithelial cells, and thus suppressed the development of LN.
Collapse
Affiliation(s)
- Xiaofei Peng
- Department of Rheumatology and Immunology, The Second Xiangya Hospital, Central South University, Changsha 410000, Hunan, PR China
| | - Tao Yang
- Department of Otolaryngology, Head and Neck Surgery, the Second Xiangya Hospital, Central South University, Changsha 410000, Hunan, PR China
| | - Guoyong Liu
- Department of Nephrology, The First Affiliated Hospital of Changde Vocational Technical College, Changde 415000, Hunan, PR China
| | - Hong Liu
- Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha 410000, Hunan, PR China
| | - Youming Peng
- Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha 410000, Hunan, PR China
| | - Liyu He
- Department of Nephrology, The Second Xiangya Hospital, Central South University, Changsha 410000, Hunan, PR China.
| |
Collapse
|
3
|
Freitas EC, de Oliveira MS, Monticielo OA. Pristane-induced lupus: considerations on this experimental model. Clin Rheumatol 2017; 36:2403-2414. [PMID: 28879482 DOI: 10.1007/s10067-017-3811-6] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2017] [Revised: 08/20/2017] [Accepted: 08/28/2017] [Indexed: 10/18/2022]
Abstract
Systemic lupus erythematosus (SLE) is a multifactorial, autoimmune inflammatory disease with pleomorphic clinical manifestations involving different organs and tissues. The etiology of this disease has been associated with a dysfunctional response of B and T lymphocytes against environmental stimuli in individuals genetically susceptible to SLE, which determines an immune response against different autoantigens and, consequently, tissue damage. The study of different murine models has provided a better understanding of these autoimmune phenomena. This review primarily focuses on that has been learned from the pristane-induced lupus (PIL) model and how this model can be used to supplement recent advances in understanding the pathogenesis of SLE. We also consider both current and future therapies for this disease. The PubMed, SciELO, and Embase databases were searched for relevant articles published from 1950 to 2016. PIL has been shown to be a useful tool for understanding the multiple mechanisms involved in systemic autoimmunity. In addition, it can be considered an efficient model to evaluate the environmental contributions and interferon signatures present in patients with SLE.
Collapse
Affiliation(s)
- Eduarda Correa Freitas
- Laboratory of Autoimmune Diseases, Division of Rheumatology, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul, Rua Ramiro Barcelos, 2350, room 645, Porto Alegre, 90035-003, Brazil
| | - Mayara Souza de Oliveira
- Laboratory of Autoimmune Diseases, Division of Rheumatology, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul, Rua Ramiro Barcelos, 2350, room 645, Porto Alegre, 90035-003, Brazil
| | - Odirlei André Monticielo
- Laboratory of Autoimmune Diseases, Division of Rheumatology, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul, Rua Ramiro Barcelos, 2350, room 645, Porto Alegre, 90035-003, Brazil.
| |
Collapse
|
4
|
Purinergic signalling in autoimmunity: A role for the P2X7R in systemic lupus erythematosus? Biomed J 2016; 39:326-338. [PMID: 27884379 PMCID: PMC6138817 DOI: 10.1016/j.bj.2016.08.006] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Revised: 07/29/2016] [Accepted: 08/08/2016] [Indexed: 12/11/2022] Open
Abstract
Purinergic signalling plays a crucial role in immunity and autoimmunity. Among purinergic receptors, the P2X7 receptor (P2X7R) has an undisputed role as it is expressed to high level by immune cells, triggers cytokine release and modulates immune cell differentiation. In this review, we focus on evidence supporting a possible role of the P2X7R in the pathogenesis of systemic lupus erythematosus (SLE).
Collapse
|