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Effects of extracellular Hsp70, lipopolysaccharide and lipoteichoic acid on human monocyte-derived macrophages and differentiated THP-1 cells
Biological Chemistry ( IF 3.7 ) Pub Date : 2020-09-25 , DOI: 10.1515/hsz-2020-0138
Andrea Hulina-Tomašković 1 , Anita Somborac-Bačura 1 , Marija Grdić Rajković 1 , Iva Hlapčić 1 , Martina Bosnar 2 , Lada Rumora 1
Affiliation  

Abstract Extracellular Hsp70 (eHsp70) is elevated in blood of patients with inflammatory diseases (e.g. chronic obstructive pulmonary disease), prone to bacterial infections. It stimulates pro-inflammatory effects in cells via TLR2 and TLR4. The main hypothesis was that eHsp70 induces inflammation and alters inflammatory responses to lipopolysaccharide (LPS) and lipoteichoic acid (LTA). We assessed pro-inflammatory cytokines concentrations, TLR2, TLR4 and Hsp70 mRNA expressions, NF-κB and MAPKs activation, and viability after treatment of monocyte-derived macrophages (MDMs) and THP-1 cells with recombinant human (rh) Hsp70, LPS and LTA. rhHsp70, LPS, LTA and their combinations induced IL-6, IL-8 and TNF-α from MDMs. LPS, LTA, and combinations with rhHsp70 increased TLR2 and decreased TLR4 in both cells. rhHsp70 increased TLR2 and TLR4 in THP-1 cells, and TLR2 in MDMs. rhHsp70, LPS and their combinations up-regulated Hsp70 in MDMs, while down-regulated it in THP-1. LPS and its combinations with rhHsp70 lowered cell viability in THP-1 cells and activated caspases-8 and -9. Involvement of NF-κB and MAPKs in inflammatory and survival mechanisms stimulated by rhHsp70 was demonstrated. eHsp70 alone and in combination with bacterial components could provoke inflammation and affect viability of MDMs and THP-1 cells leading to disturbed inflammatory responses in diseases accompanied with bacterial colonisations or infections.

中文翻译:

细胞外Hsp70、脂多糖和脂磷壁酸对人单核细胞源巨噬细胞和分化的THP-1细胞的影响

摘要 炎症性疾病(如慢性阻塞性肺疾病)患者的血液中细胞外 Hsp70 (eHsp70) 升高,容易发生细菌感染。它通过 TLR2 和 TLR4 在细胞中刺激促炎作用。主要假设是 eHsp70 诱导炎症并改变对脂多糖 (LPS) 和脂磷壁酸 (LTA) 的炎症反应。我们评估了促炎细胞因子浓度、TLR2、TLR4 和 Hsp70 mRNA 表达、NF-κB 和 MAPKs 活化以及用重组人 (rh) Hsp70、LPS 和单核细胞衍生的巨噬细胞 (MDM) 和 THP-1 细胞处理后的活力。陆交局。rhHsp70、LPS、LTA 及其组合可诱导 MDM 的 IL-6、IL-8 和 TNF-α。LPS、LTA 和与 rhHsp70 的组合增加了两种细胞中的 TLR2 并降低了 TLR4。rhHsp70 增加了 THP-1 细胞中的 TLR2 和 TLR4,以及 MDM 中的 TLR2。rhHsp70、LPS 及其组合在 MDM 中上调 Hsp70,而在 THP-1 中下调 Hsp70。LPS 及其与 rhHsp70 的组合降低了 THP-1 细胞中的细胞活力并激活了 caspase-8 和 -9。证实了 NF-κB 和 MAPKs 参与了由 rhHsp70 刺激的炎症和存活机制。eHsp70 单独使用以及与细菌成分结合使用可能会引发炎症并影响 MDM 和 THP-1 细胞的活力,从而导致伴随细菌定植或感染的疾病的炎症反应受到干扰。证实了 NF-κB 和 MAPKs 参与了由 rhHsp70 刺激的炎症和存活机制。eHsp70 单独使用以及与细菌成分结合使用可能会引发炎症并影响 MDM 和 THP-1 细胞的活力,从而导致伴随细菌定植或感染的疾病的炎症反应受到干扰。证实了 NF-κB 和 MAPKs 参与了由 rhHsp70 刺激的炎症和存活机制。eHsp70 单独使用以及与细菌成分结合使用可能会引发炎症并影响 MDM 和 THP-1 细胞的活力,从而导致伴随细菌定植或感染的疾病的炎症反应受到干扰。
更新日期:2020-09-25
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