These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: [Effect of TFF3 on tight junction protein in eosinophilic chronic sinusitis and its related mechanism].
    Author: Han M, Tang BX, Tu JH, Yu JQ, Luo Q, Ye J.
    Journal: Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi; 2023 Aug 07; 58(8):754-764. PubMed ID: 37599236.
    Abstract:
    Objective: To study the effect of trefoil factor family (TFF) 3 on the expression of tight junctions (TJs) in the nasal mucosa epithelium of eosinophilic chronic rhinosinusitis (eCRS) and its mechanism. Methods: From September to December 2020, eligible patients from the Department of Otorhinolaryngology of the First Affiliated Hospital of Nanchang University were recruited, including 11 control patients and 37 patients with chronic rhinosinusitis with nasal polyps (CRSwNP), from whom nasal mucosa and nasal polyp tissue samples were collected. Immunohistochemistry (IHC) was used to detect the localization and expression intensity of TFFs (TFF1, TFF2 and TFF3) and TJs (occudin, claudin-1 and ZO-1) in nasal mucosa. Real-time fluorescence quantitative polymerase chain reaction (RT-qPCR) and western blot (WB) were used to detect the mRNA and protein expression. A cell model of tight junction injury in human nasal epithelial cells (HNECs) through stimulation with interleukin (IL)-13 was also established. The optimal modeling concentration and time for HNECs were determined, which were subsequently treated with TFF3 and/or a phosphoinositide 3-kinase (PI3K)-specific inhibitor (LY294002). Finally, RT-qPCR and WB were used to assess the effects of TFF3 on tight junctions and the PI3K/serine/threonine kinase (Akt) signaling pathway. Data were analyzed statistically using GraphPad Prism 7 software. Results: IHC results showed that the expression of TFF1 and TFF3 in nasal mucosa of eCRS group was significantly higher than that of control group (t=4.62, P=0.002; t=5.89, P<0.001), respectively, mainly expressed in goblet cell. The expression of occludin, claudin-1 and ZO-1 in the nasal mucosa of the eCRS group was lower than that of the control group (occludin t=3.98, P=0.019; claudin-1 t=5.15, P=0.002; ZO-1 t=5.42, P=0.001), respectively. WB results showed that the expression of TFF3 in non-eosinophilic chronic sinusitis (Non-eCRS) group and eCRS group was higher than that in the control group (t=3.62, P=0.036; t=5.93, P<0.001). The expression of occludin, claudin-1 and ZO-1 in eCRS group was lower than that in the control group (occludin t=5.14, P=0.002; claudin-1 t=6.35, P<0.001; ZO-1 t=6.64, P<0.001), respectively. The RT-qPCR results showed that compared with the control group, the levels of TFF1 and TFF3 mRNA were increased in the nasal mucosal epithelium of the Non-eCRS and eCRS groups (TFF1 t=3.98, P=0.046, t=4.89, P=0.002; TFF3 t=3.50, P=0.044, t=6.78, P<0.001). There was no statistically significant difference in TFF2 mRNA levels between the Non-eCRS and eCRS groups (t=1.34, P=0.061; t=3.37, P=0.055). Compared with the control group, Non-eCRS and eCRS groups showed a decrease in the mRNA levels of occludin, claudin-1 and ZO-1 (occludin t=4.27, P=0.011, t=5.61, P=0.007; claudin-1 t=3.62, P=0.036, t=6.80, P<0.001; ZO-1 t=3.47, P=0.047, t=7.86, P<0.001). The mRNA levels of TFF3 and TJs in eCRS nasal mucosa tissue showed a moderate positive correlation (occludin r=0.661, claudin-1 r=0.614, ZO-1 r=0.548, all P<0.001); TFF1 showed a low degree of positive correlation with the expression of occludin, claudin-1 and ZO-1 (occludin r=0.467, P=0.040; claudin-1 r=0.362, P=0.012; ZO-1 r=0.425, P=0.025). The establishment of cell models showed that compared with normal HNECs, the mRNA expression of TFF3 was most significantly increased at a concentration of 50 ng/ml stimulated by IL-13 (t=3.72, P=0.013); The mRNA expression of occludin, claudin-1 and ZO-1 decreased (occludin t=3.18, P=0.031; claudin-1 t=3.86, P=0.010; ZO-1 t=5.16, P=0.002). The expression of TFF3 mRNA increased most significantly after 15 hours of IL-13 stimulation (t=3.14, P=0.034); The mRNA expression of occludin, claudin-1 and ZO-1 decreased (occludin t=3.97, P=0.010; claudin-1 t=4.78, P=0.004; ZO-1 t=5.16, P=0.004). TJs damage model could be established by treating HNECs with 50 ng/ml IL-13 for 15 hours. Intervention experiments showed that compared with the IL-13 group, the IL-13+TFF3 group showed an increase in TJs mRNA expression (occludin t=6.10, P=0.009; claudin-1 t=5.90, P=0.013; ZO-1 t=9.44, P=0.007). Compared with the IL-13 group, the expression of TJs protein in the IL-13+TFF3 group increased (occludin t=3.23, P=0.013; claudin-1 t=9.40, P=0.017; ZO-1 t=2.23, P=0.032); The expression of TJs protein decreased in the IL-13+TFF3+LY294002 group (occludin t=4.73, claudin-1 t=8.77, ZO-1 t=3.51, all P<0.001). Compared with the IL-13+TFF3 group, the IL-3+TFF3+LY294002 group showed a decrease in PI3K and p-Akt/Akt protein expression (PI3K t=13.29, p-Akt/Akt t=10.30, all P<0.001). The increased mRNA and protein expression of occludin, claudin-1 and ZO-1 induced by TFF3 were also inhibited by LY294002. Conclusion: TFF3 can up-regulate the expression of occludin, claudin-1, and ZO-1 through PI3K/Akt pathway, and has a certain protective effect on the nasal mucosal epithelial barrier, providing a new idea for treating eCRS. 目的： 研究三叶因子家族（trefoil factor family，TFF）3对嗜酸粒细胞性慢性鼻窦炎（eCRS）鼻黏膜上皮中紧密连接（tight junctions，TJs）蛋白的影响及作用机制。 方法： 2020年9—12月南昌大学第一附属医院耳鼻咽喉科符合入组条件的患者为样本来源，包括11例对照患者鼻黏膜组织和37例慢性鼻窦炎伴鼻息肉（CRSwNP）患者鼻息肉组织。在鼻黏膜中，采用免疫组织化学法（IHC）检测TFFs（TFF1、TFF2和TFF3）和TJs（occludin、claudin-1和ZO-1）的定位和表达强度，实时荧光定量聚合酶链反应（RT-qPCR）及免疫印迹（WB）检测TFFs和TJs的mRNA和蛋白的表达。取人鼻黏膜进行鼻黏膜上皮细胞（human nasal epithelial cells，HNECs）原代培养，用白细胞介素（IL）-13刺激，建立HNECs的TJs损伤细胞模型，确定最佳造模浓度及时间。单独或联合使用TFF3和磷脂酰肌醇3-激酶（phosphoinositide 3-kinase，PI3K）特异性抑制剂（LY294002）作用于HNECs或TJs损伤模型，RT-qPCR和WB检测TFF3对TJs及PI3K/丝氨酸/苏氨酸激酶（serine/threonine kinase，Akt）的影响。采用GraghPad Prism 7软件进行数据统计分析与作图。 结果： IHC结果显示，eCRS组鼻黏膜中TFF1和TFF3表达均较对照组显著升高（t=4.62，P=0.002；t=5.89，P<0.001），主要表达于杯状细胞；eCRS组鼻黏膜occludin、claudin-1、ZO-1表达均低于对照组（occludin t=3.98，P=0.019；claudin-1 t=5.15，P=0.002；ZO-1 t=5.42，P=0.001）。WB结果显示，TFF3在非嗜酸粒细胞性慢性鼻窦炎（Non-eCRS）组、eCRS组表达较对照组升高（t=3.62，P=0.036；t=5.93，P<0.001），eCRS组中occludin、claudin-1和ZO-1的表达低于对照组（occludin t=5.14，P=0.002；claudin-1 t=6.35，P<0.001；ZO-1 t=6.64，P<0.001）。RT-qPCR结果显示，与对照组相比，TFF1和TFF3 mRNA水平在Non-eCRS和eCRS组鼻黏膜上皮中升高（TFF1 t=3.98，P=0.046，t=4.89，P=0.002；TFF3 t=3.50，P=0.044，t=6.78，P<0.001），TFF2 mRNA水平在Non-eCRS和eCRS组的差异无统计学意义（t=1.34，P=0.061；t=3.37，P=0.055）。与对照组相比，Non-eCRS及eCRS组occludin、claudin-1和ZO-1 mRNA降低（occludin t=4.27，P=0.011，t=5.61，P=0.007；claudin-1 t=3.62，P=0.036，t=6.80，P<0.001；ZO-1 t=3.47，P=0.047，t=7.86，P<0.001）。eCRS鼻黏膜组织中TFF3和TJs mRNA水平呈中度正相关（occludin r=0.661，claudin-1 r=0.614，ZO-1 r=0.548，P值均<0.001）；TFF1与occludin、claudin-1和ZO-1表达呈低度正相关（occludin r=0.467，P=0.040；claudin-1 r=0.362，P=0.012；ZO-1 r=0.425，P=0.025）。细胞模型建立情况显示，与正常HNECs相比，IL-13刺激浓度在50 ng/ml时，TFF3的mRNA表达升高最明显（t=3.72，P=0.013）；occludin、claudin-1和ZO-1的mRNA表达下降（occludin t=3.18，P=0.031；claudin-1 t=3.86，P=0.010；ZO-1 t=5.16，P=0.002）。IL-13刺激15 h的TFF3 mRNA表达升高最明显（t=3.14，P=0.034）；occludin、claudin-1和ZO-1的mRNA表达下降（occludin t=3.97，P=0.010；claudin-1 t=4.78，P=0.004；ZO-1 t=5.16，P=0.004）。50 ng/ml IL-13处理HNECs 15 h可建立TJs损伤模型。干预实验显示，与IL-13组相比，IL-13+TFF3组TJs mRNA表达升高（occludin t=6.10，P=0.009；claudin-1 t=5.90，P=0.013；ZO-1 t=9.44，P=0.007）。与IL-13组相比，IL-13+TFF3组TJs蛋白表达升高（occludin t=3.23，P=0.013；claudin-1 t=9.40，P=0.017；ZO-1 t=2.23，P=0.032）；IL-13+TFF3+LY294002组TJs蛋白表达降低（occludin t=4.73，claudin-1 t=8.77，ZO-1 t=3.51，P值均<0.001）。IL-3+TFF3+LY294002组与IL-13+TFF3组相比，PI3K和p-Akt/Akt蛋白表达均降低（PI3K t=13.29，p-Akt/Akt t=10.30，P值均<0.001）。TFF3引起的occludin、claudin-1、ZO-1 mRNA和蛋白表达升高作用也被LY294002抑制。 结论： TFF3可通过PI3K/Akt上调occludin、claudin-1和ZO-1的表达，对鼻黏膜上皮屏障有一定的保护作用，可为eCRS治疗提供新思路。.
    [Abstract] [Full Text] [Related] [New Search]