Development of FluoAHRL: A Novel Synthetic Fluorescent Compound That Activates AHR and Potentiates Anti-Inflammatory T Regulatory Cells
摘要:
Aryl Hydrocarbon Receptor (AHR) ligands, upon binding, induce distinct gene expression profiles orchestrated by the AHR, leading to a spectrum of pro- or anti-inflammatory effects. In this study, we designed, synthesized and evaluated three indole-containing potential AHR ligands (FluoAHRL: AGT-4, AGT-5 and AGT-6). All synthesized compounds were shown to emit fluorescence in the near-infrared. Their AHR agonist activity was first predicted using in silico docking studies, and then confirmed using AHR luciferase reporter cell lines. FluoAHRLs were tested in vitro using mouse peritoneal macrophages and T lymphocytes to assess their immunomodulatory properties. We then focused on AGT-5, as it illustrated the predominant anti-inflammatory effects. Notably, AGT-5 demonstrated the ability to foster anti-inflammatory regulatory T cells (Treg) while suppressing pro-inflammatory T helper (Th)17 cells in vitro. AGT-5 actively induced Treg differentiation from naïve CD4+ cells, and promoted Treg proliferation, cytotoxic T-lymphocyte-associated antigen 4 (CTLA-4) expression and interleukin-10 (IL-10) production. The increase in IL-10 correlated with an upregulation of Signal Transducer and Activator of Transcription 3 (STAT3) expression. Importantly, the Treg-inducing effect of AGT-5 was also observed in human tonsil cells in vitro. AGT-5 showed no toxicity when applied to zebrafish embryos and was therefore considered safe for animal studies. Following oral administration to C57BL/6 mice, AGT-5 significantly upregulated Treg while downregulating pro-inflammatory Th1 cells in the mesenteric lymph nodes. Due to its fluorescent properties, AGT-5 could be visualized both in vitro (during uptake by macrophages) and ex vivo (within the lamina propria of the small intestine). These findings make AGT-5 a promising candidate for further exploration in the treatment of inflammatory and autoimmune diseases.
The synthesis and spectral properties of a stimuli-responsive D–π–A charge transfer dye based on indole donor and dicyanomethylene acceptor moiety
作者:Yu Wang、Seon-Yeong Gwon、Sheng Wang、Sung-Hoon Kim
DOI:10.1016/j.saa.2011.10.039
日期:2012.2
A dual mode chemosensor dye 3 for detection of fluoride ion, based on the D-π-A molecular framework by one-step condensation, presents high selectivity and sensitivity both in colorimetric and fluorometric analyses. Upon the addition of F(-) anion, the absorption band shows a remarkable red shift along with fluorescent intensity decreasing. The absorption and fluorescent intensities of the dye 3 can
申请人:Kyungpook National University Industry-Academic Cooperation Foundation 경북대학교 산학협력단(220040016844) BRN ▼504-82-09678
公开号:KR101484697B1
公开(公告)日:2015-01-20
본 발명은 하기 화학식 1로 표시되는 화합물을 포함하는 수은 이온 검출용 조성물 및 이를 이용한 수은 이온 검출방법에 관한 것이다. 이에 따라, 하기 화학식 1로 표시되는 화합물은 수은 이온을 선택적으로 검출할 수 있어, 생물학계, 화학계 및 환경학계에 효과적인 수은 이온 감지용 염료로 제공할 수 있다. [화학식 1]