Faculty Opinions recommendation of Regulation of phenotypic heterogeneity permits Salmonella evasion of the host caspase-1 inflammatory response.

Author(s):  
Andreas Baumler ◽  
Sebastian Winter
2011 ◽  
Vol 108 (51) ◽  
pp. 20742-20747 ◽  
Author(s):  
M. K. Stewart ◽  
L. A. Cummings ◽  
M. L. Johnson ◽  
A. B. Berezow ◽  
B. T. Cookson

2019 ◽  
Vol 17 (12) ◽  
pp. 1245-1256 ◽  
Author(s):  
Yuting Jin ◽  
Changyong Li ◽  
Dongwei Xu ◽  
Jianjun Zhu ◽  
Song Wei ◽  
...  

AbstractNotch signaling plays important roles in the regulation of immune cell functioning during the inflammatory response. Activation of the innate immune signaling receptor NLRP3 promotes inflammation in injured tissue. However, it remains unknown whether Jagged1 (JAG1)-mediated myeloid Notch1 signaling regulates NLRP3 function in acute liver injury. Here, we report that myeloid Notch1 signaling regulates the NLRP3-driven inflammatory response in ischemia/reperfusion (IR)-induced liver injury. In a mouse model of liver IR injury, Notch1-proficient (Notch1FL/FL) mice receiving recombinant JAG1 showed a reduction in IR-induced liver injury and increased Notch intracellular domain (NICD) and heat shock transcription factor 1 (HSF1) expression, whereas myeloid-specific Notch1 knockout (Notch1M-KO) aggravated hepatocellular damage even with concomitant JAG1 treatment. Compared to JAG1-treated Notch1FL/FL controls, Notch1M-KO mice showed diminished HSF1 and Snail activity but augmented NLRP3/caspase-1 activity in ischemic liver. The disruption of HSF1 reduced Snail activation and enhanced NLRP3 activation, while the adoptive transfer of HSF1-expressing macrophages to Notch1M-KO mice augmented Snail activation and mitigated IR-triggered liver inflammation. Moreover, the knockdown of Snail in JAG1-treated Notch1FL/FL livers worsened hepatocellular functioning, reduced TRX1 expression and increased TXNIP/NLRP3 expression. Ablation of myeloid Notch1 or Snail increased ASK1 activation and hepatocellular apoptosis, whereas the activation of Snail increased TRX1 expression and reduced TXNIP, NLRP3/caspase-1, and ROS production. Our findings demonstrated that JAG1-mediated myeloid Notch1 signaling promotes HSF1 and Snail activation, which in turn inhibits NLRP3 function and hepatocellular apoptosis leading to the alleviation of IR-induced liver injury. Hence, the Notch1/HSF1/Snail signaling axis represents a novel regulator of and a potential therapeutic target for liver inflammatory injury.


2002 ◽  
Vol 169 (11) ◽  
pp. 6401-6407 ◽  
Author(s):  
Sarah J. Rowe ◽  
Lucy Allen ◽  
Victoria C. Ridger ◽  
Paul G. Hellewell ◽  
Moira K. B. Whyte

Author(s):  
Г.Ф. Корытина ◽  
Ю.Г. Азнабаева ◽  
М.Ю. Темнов ◽  
Ш.Р. Зулькарнеев ◽  
Л.З. Ахмадишина ◽  
...  

Хроническая обструктивная болезнь легких (ХОБЛ) - это многофакторное хроническое воспалительное заболевание респираторной системы. Одной из причин трудностей в идентификации маркеров ХОБЛ является фенотипическая гетерогенность. Цель - идентификация новых молекулярных маркеров патогенетических изменений, связанных с фенотипической гетерогеностью ХОБЛ на основе анализа профиля экспрессии генов вовлеченных в развитие иммунного ответа в мононуклеарных клетках периферической крови и анализа ассоциации полиморфных вариантов новых кандидатных генов с развитием ХОБЛ. Проведен сравнительный анализ профиля экспрессии панели 84 генов, кодирующих цитокины, хемокины в PBMC пациентов с различными фенотипами ХОБЛ: с частыми обострениями N=10 и редкими обострениями N=10 и контрольной группе N=10. Для анализа ассоциации использовали образцы ДНК больных ХОБЛ (N=601) и контроля (N=617), методом ПЦР в реальном времени проведен анализ 56 полиморфных локусов генов JAK/STAT-, NFKB1-сигнального путей, кодирующих белки, вовлеченные в реализацию реакций иммунного ответа и воспаления. Выявлены значимые изменения профиля экспрессии ряда генов в группе больных ХОБЛ с частыми обострениями. Впервые получены данные по вкладу полиморфных локусов генов JAK1, JAK3, STAT3, ICAM1, PECAM1, SAA1, NFKB1, IL17A, CCR2, CCR6, CCL8, CRP, CX3CL1, CXCR2, CXCR1, TNFRSF1A, IL20, IL19, в развитие данного заболевания. Выявлены специфические генетические маркеры развития фенотипа с частыми обострениями: CXCR2, TNFRSF1B, CCR6, TNF, IL1B, IL10, JAK3, PECAM1. Установлена ассоциация полиморфных вариантов генов TNFRSF1B, TNFRSF1A, CCL23, CXCR2, JAK1, NFKB1, PECAM1, ICAM1, STAT1, LTA, CD14, CXCL12, CCL20, ADIPOR1 и CX3CR1 с показателями функции внешнего дыхания. Определена взаимосвязь аллельных вариантов генов: IL17A, JAK1, JAK3, NFKB1, CCL5, CCL11, CCL17, CXCL8, TNFRSF1A, CX3CL1, CCL8, CCR6, CXCR2, IL19, IL20 с индексом курения. Chronic obstructive pulmonary disease (COPD) is a multifactorial heterogeneous chronic inflammatory disease of the respiratory system predominantly affecting the lower respiratory pathways and the lung parenchyma. One of the reason for difficulties in identifying of COPD markers is phenotypic heterogeneity. The goal of the study is the identification of new molecular markers of pathogenetic changes associated with phenotypic heterogeneity of COPD based on the analysis of the expression profile of genes involved in the development of the immune response in peripheral blood mononuclear cells and analysis of the association of polymorphic variants of new candidate genes with COPD. Methods: to identify differential gene expression in COPD we performed expression profiling of 84 cytokines and chemokines genes in peripheral blood samples from COPD (N=10 with frequent exacerbation phenotype, N=10 rare exacerbation phenotype) and N=10 smoking controls. RNA was isolated from PBMCs, and gene expression was assessed using RT2 Profiler PCR Arrays «Human Cytokines & Chemokines PCR Array»» (Qiagen, Valencia, CA, USA). 56 SNPs of JAK / STAT-, NFKB1-signaling pathway and inflammatory response molecules genes were genotyped by the real-time polymerase chain reaction (TaqMan assays) in a case-control study (601 COPD patients and 617 controls). Results. Significant changes were revealed in the expression profile of several genes in “frequent exacerbator» COPD phenotype. The results indicate a down-regulation of inflammatory molecules in “frequent exacerbator» COPD phenotype. For the first time, we indicated the contribution of JAK1, JAK3, STAT3, ICAM1, PECAM1, SAA1, NFKB1, IL17A, CCR2, CCR6, CCL8, CRP, CX3CL1, CXCR2, CXCR1, TNFRSF1A, IL20, IL19 genes polymorphisms to COPD. Specific genetic markers of “frequent exacerbator” COPD phenotype have been identified, which are modifiers of COPD progression, including polymorphic loci of the CXCR2, TNFRSF1B, CCR6, TNF, IL1B, IL10, JAK3, PECAM1 genes. A significant genotype-dependent variation of lung function parameters was observed for CXCR2, JAK1, NFKB1, PECAM1, ICAM1, STAT1, LTA, CD14, CXCL12, CCL20, ADIPOR1 and CX3CR1 genes. The relationship of IL17A, JAK1, JAK3, NFKB1, CCL5, CCL11, CCL17, CXCL8, TNFRSF1A, CX3CL1, CCL8, CCR6, CXCR2, IL19, IL20 genes with smoking pack-years was found.


2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Peng Lv ◽  
Haoran Liu ◽  
Tao Ye ◽  
Xiaoqi Yang ◽  
Chen Duan ◽  
...  

The roles of the lncRNA X inactive specific transcript (XIST) in many diseases, including cancers and inflammatory sickness, have been previously elucidated. However, renal calculus remained poorly understood. In this study, we revealed the potential effects of XIST on kidney stones that were exerted via inflammatory response and oxidative stress mechanisms. We established a glyoxylate-induced calcium oxalate (CaOx) stone mouse model and exposed HK-2 cells to calcium oxalate monohydrate (COM). The interactions among XIST, miR-223-3p, and NOD-like receptor protein 3 (NLRP3) and their respective effects were determined by RNAs and protein expression, luciferase activity, and immunohistochemistry (IHC) assays. Cell necrosis, reactive oxygen species (ROS) generation, and inflammatory responses were detected after silencing XIST, activating and inhibiting miR-223-3p, and both knocking down XIST and activating miR-223-3p in vitro and in vivo. The XIST, NLRP3, caspase-1, and IL-1β levels were notably increased in kidney samples from glyoxylate-induced CaOx stone model mice. XIST knockdown significantly suppressed the inflammatory damage and ROS production and further attenuated oxalate crystal deposition. miRNA-223-3p mimics also exerted the same effects. Moreover, we verified the interactions among XIST, miRNA-223-3p and NLRP3, and the subsequent effects. Our results suggest that the lncRNA XIST participates in the formation and progression of renal calculus by interacting with miR-223-3p and the NLRP3/Caspase-1/IL-1β pathway to mediate the inflammatory response and ROS production.


2020 ◽  
Vol 17 ◽  
Author(s):  
Zhonghua Hu ◽  
Juan Liao ◽  
Fan Zhang ◽  
Wenxiang Qing ◽  
Rili Yu ◽  
...  

Objective: Post-operative chronic post-thoracotomy pain (CPTP) has been linked to restrictions in mobility and daily activities. However, its potential causes and optimal therapy have not been well characterized. Here, the purpose of this study was to investigate the role of Toll-like receptor 4 (TLR4) in CPTP rats and its underlying mechanism. Methods: Initially, rat models of CPTP were established. Then, the mechanical withdrawal threshold (MWT) was measured after intrathecal injection of TLR4 antagonist (LPS-RS), TLR4 agonist (LPS-PG), or caspase-1 inhibitor (Ac-YVAD-CMK) in CPTP rats. Levels of TNF-α, IL-6 and IL-1β in the spinal dorsal horn (SDH) were measured by ELISA. TLR4 and caspase-1 were located by immunofluorescence double staining. TLR4 and caspase-1 levels were assessed by qRT-PCR and Western blot. Results: TLR4 and caspase-1 were up-regulated in SDH of CPTP rats. Compared with Sham and non-CPTP groups, MWT was effectively decreased while TNF-α, IL-6 and IL-1β in SDH were increased in CPTP group. Moreover, intrathecal injection of TLR4 antagonist or caspase-1 inhibitor significantly elevated MWT expression and reduced levels of TNF-α, IL-6 and IL-1β in SDH. Additionally, high expression of TLR4 promoted mechanical hyperalgesia and inflammatory response, while intrathecal injection of a mixture of caspase-1 inhibitor and TLR4 agonist reversed the alleviation of caspase-1 inhibitor on the mechanical hyperalgesia and inflammatory response. TLR4 and caspase-1 were co-located in neurons. Conclusion: TLR4 aggravated CPTP in rats by mediating activation of caspase-1 in SDH.


2010 ◽  
Vol 33 (1) ◽  
pp. 178-185 ◽  
Author(s):  
Min-Jun Seo ◽  
Su-Jin Kim ◽  
Tae-Hee Kang ◽  
Hong-Kun Rim ◽  
Hyun-Ja Jeong ◽  
...  

2016 ◽  
Vol 215 ◽  
pp. 65-71 ◽  
Author(s):  
Xue-lan Liu ◽  
Wen-jie Shan ◽  
Li-juan Jia ◽  
Xu Yang ◽  
Jin-jing Zhang ◽  
...  

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