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Let-7e-5p調(diào)控Fas/FasL影響小鼠變應(yīng)性鼻炎發(fā)病的機(jī)制研究

2023-11-08 09:00:42唐橋斐曹建秋張爽
天津醫(yī)藥 2023年4期
關(guān)鍵詞:變應(yīng)性熒光素酶鼻炎

唐橋斐 曹建秋 張爽

摘要:目的 探討let-7e-5p對小鼠變應(yīng)性鼻炎的影響及機(jī)制。方法 將18只BALB/c小鼠按隨機(jī)數(shù)字表法均分為對照(Control)組、變應(yīng)性鼻炎(AR)組、let-7e-5p激動劑陰性對照(AR+agomir-NC)組、let-7e-5p激動劑(AR+agomir)組、let-7e-5p抑制劑陰性對照(AR+antagomir-NC)組和let-7e-5p抑制劑(AR+antagomir)組。除Control組外,其余組應(yīng)用卵白蛋白(OVA)致敏建立AR模型,AR+agomir組和AR+antagomir組同時給予let-7e-5p agomir或let-7e-5p antagomir進(jìn)行干預(yù),末次激發(fā)致敏后對小鼠變應(yīng)性鼻炎進(jìn)行評分,HE染色觀察鼻黏膜組織,統(tǒng)計嗜酸性粒細(xì)胞數(shù)量,real-time PCR檢測let-7e-5p、Fas、FasL mRNA表達(dá),Western blot檢測Fas、FasL蛋白表達(dá),酶聯(lián)免疫吸附試驗檢測血清免疫球蛋白E(IgE)、特異性IgE(sIgE)、干擾素γ(IFN-γ)、白細(xì)胞介素(IL)-12、IL-4、IL-13水平,雙熒光素酶實驗分析let-7e-5p和Fas、FasL的靶向關(guān)系。結(jié)果 與Control組比較,AR組小鼠變應(yīng)性鼻炎評分升高,鼻黏膜增生明顯,嗜酸性粒細(xì)胞數(shù)量增加,let-7e-5p mRNA表達(dá)及IFN-γ、IL-12水平下降,F(xiàn)as、FasL表達(dá)及IgE、sIgE、IL-4、IL-13水平升高(均P<0.05)。與AR+agomir-NC組比較,AR+agomir組小鼠變應(yīng)性鼻炎評分降低,鼻黏膜結(jié)構(gòu)清晰,嗜酸性粒細(xì)胞數(shù)量減少,let-7e-5p mRNA表達(dá)及IFN-γ、IL-12水平升高,F(xiàn)as、FasL表達(dá)及IgE、sIgE、IL-4、IL-13水平下降(均P<0.05)。與AR+antagomir-NC組比較,AR+antagomir組小鼠變應(yīng)性鼻炎評分升高,鼻黏膜增厚,嗜酸性粒細(xì)胞數(shù)量增加,let-7e-5p mRNA表達(dá)減少,F(xiàn)as、FasL表達(dá)及IgE、sIgE、IL-4、IL-13水平升高(均P<0.05),IL-12、IFN-γ水平差異無統(tǒng)計學(xué)意義。與NC+3'UTR-WT組比較,let-7e-5p agomir+3'UTR-WT組熒光素酶活性下降(P<0.05)。結(jié)論 Let-7e-5p通過靶向調(diào)節(jié)Fas/FasL影響1型輔助性T細(xì)胞(Th1)/2型輔助性T細(xì)胞(Th2)平衡,從而參與AR小鼠變應(yīng)性鼻炎發(fā)病的進(jìn)展。

關(guān)鍵詞:鼻炎,變應(yīng)性,常年性;疾病模型,動物;let-7e-5p;Fas;FasL;1型輔助性T細(xì)胞;2型輔助性T細(xì)胞

中圖分類號:R765.21文獻(xiàn)標(biāo)志碼:ADOI:10.11958/20221110

Study on the mechanism of let-7e-5p regulating Fas/FasL to affect the pathogenesis of allergic rhinitis in mice

TANG Qiaofei CAO Jianqiu ZHANG Shuang

1 Department of Otolaryngology, 2 Department of Cadre, the Second Hospital of

Shenyang Medical College, Shenyang 110002, China

Corresponding Author E-mail: zs_5257@163.com

Abstract: Objective To investigate the effect and mechanism of let-7e-5p on allergic rhinitis in mice. Methods Eighteen BALB/c mice were randomly divided into the control group, the allergic rhinitis (AR) group, the let-7e-5p agonist negative control (AR+agomir-NC) group, the let-7e-5p agonist (AR+agomir) group, the let-7e-5p inhibitor negative control (AR+antagomir-NC) group and the let-7e-5p inhibitor (AR+antagomir) group. Except the control group, the other groups were sensitized with ovalbumin (OVA) to establish AR model. The AR+agomir group and the AR+antagomir group were treated with let-7e-5p agomir or let-7e-5p antagomir at the same time for intervention. After the last sensitization, the allergic rhinitis of mice were scored. HE staining was used to observe nasal mucosa. The number of eosinophils was counted. Real-time PCR was used to detect mRNA expression levels of let-7e-5p, Fas and FasL, and Western blot assay was used to detect protein expression levels of Fas and FasL. Enzyme-linked immunosorbent assay (ELISA) was used to detect serum levels of immunoglobulin E (IgE), specific immunoglobulin E (sIgE), interferon gamma (IFN-γ), interleukin (IL)-12, IL-4 and IL-13. The targeting relationship between let-7e-5p and Fas and FasL were analyzed by dual luciferase assay. Results Compared with the control group, the allergic rhinitis score was increased in the AR group, nasal mucosa hyperplasia was obvious and the number of eosinophils was increased. The expression levels of let-7e-5p and IFN-γ and IL-12 were decreased, while the expression of Fas and FasL and levels of IgE, sIgE, IL-4 and IL-13 were increased (all P<0.05). Compared with the AR+agomir-NC group, the allergic rhinitis score was decreased in the AR+agomir group, the nasal mucosa structure was clear and the number of eosinophils was reduced. The expression of let-7e-5p and levels of IFN-γ and IL-12 were increased, while the expression of Fas and FasL and levels of IgE, sIgE, IL-4 and IL-13 were decreased (all P<0.05). Compared with the AR+antagomir-NC group, the allergic rhinitis score was increased in the AR+antagomir group, the nasal mucosa was significantly thickened, and the number of eosinophils was increased. The expression of let-7e-5p was decreased, and the expression of Fas, FasL and levels of IgE, sIgE, IL-4 and IL-13 were increased (all P<0.05). There were no significant differences in IL-12 and IFN-γ between the AR+antagomir-NC group and the AR+antagomir group (P>0.05). Compared with the NC+3'UTR-WT group, luciferase activity was decreased in the let-7e-5p agomir+3'UTR-WT group (P<0.05). Conclusion Let-7e-5p may affect the balance of T helper type 1 (Th1)/ T helper type 2 (Th2) cells by targeting Fas/FasL, and thus participate in the progression of AR in mice.

Key words: rhinitis, allergic, perennial; disease models, animal; let-7e-5p;Fas;FasL; T helper type 1; T helper type 2

變應(yīng)性鼻炎(allergic rhinitis,AR)是耳鼻喉科常見病,嚴(yán)重影響患者生活質(zhì)量[1-2]。研究顯示,F(xiàn)as是一種Ⅰ型跨膜糖蛋白,F(xiàn)as和其配體(FasL)結(jié)合后的非凋亡信號活性可以介導(dǎo)免疫細(xì)胞促炎反應(yīng)[3]。支氣管哮喘患者發(fā)作期的血清可溶性Fas水平顯著高于健康人群[4]。此外,AR患者鼻甲黏膜FasL的表達(dá)與免疫球蛋白E(IgE)水平及鼻炎的嚴(yán)重程度密切相關(guān)[5]。因此,F(xiàn)as/FasL信號可能參與AR發(fā)病,但具體調(diào)控機(jī)制尚不明確。Let-7e(又名let-7e-5p)是miRNAs大家族中的一員,在炎癥反應(yīng)過程中發(fā)揮重要作用[6]。研究顯示,在AR和哮喘患者鼻黏膜中l(wèi)et-7e-5p的表達(dá)減少[7]。此外,let-7e-5p可以抑制白細(xì)胞介素(IL)-13誘導(dǎo)的鼻上皮細(xì)胞(nasal epithelial cells,NECs)炎癥反應(yīng),降低IgE、腫瘤壞死因子α(TNF-α)和組胺水平[8]。本課題組前期經(jīng)生物信息學(xué)分析發(fā)現(xiàn),F(xiàn)as/FasL是let-7e-5p的潛在靶基因。因此,本研究擬建立AR小鼠模型,探索miR-let-7e靶向調(diào)控Fas/FasL參與AR發(fā)病的潛在分子機(jī)制,以期為AR臨床治療提供新型分子靶點。

1 材料與方法

1.1 主要材料 SPF級雄性BALB/c小鼠18只,6~8周齡,體質(zhì)量16~18 g,購自遼寧長生生物科技股份有限公司。動物生產(chǎn)許可證號:SCXK(遼)2015-0001,在標(biāo)準(zhǔn)動物實驗條件下適應(yīng)性飼養(yǎng)1周,自由攝食飲水。卵白蛋白(ovalbumin,OVA)購自美國Sigma公司,F(xiàn)as抗體、FasL抗體、β-激動蛋白(β-actin)抗體購自沈陽萬類生物科技有限公司,小鼠特異性免疫球蛋白E(sIgE)酶聯(lián)免疫吸附試驗(ELISA)檢測試劑盒購自上海江萊生物科技有限公司,小鼠IgE、干擾素γ(IFN-γ)、IL-4及IL-13 ELISA檢測試劑盒購自杭州聯(lián)科生物技術(shù)股份有限公司,IL-12 ELISA檢測試劑盒購自武漢優(yōu)爾生商貿(mào)有限公司,熒光素酶檢測試劑盒購自江蘇凱基生物科技股份有限公司,let-7e-5p agomir、let-7e-5p antagomir及陰性對照由上海吉瑪制藥技術(shù)有限公司合成,內(nèi)參U6購自南京金斯瑞生物科技有限公司。

1.2 AR模型建立及分組干預(yù) 采用隨機(jī)數(shù)字表法將18只BALB/c小鼠均分為對照(Control)組、變應(yīng)性鼻炎(AR)組、let-7e-5p激動劑陰性對照(AR+agomir-NC)組、let-7e-5p激動劑(AR+agomir)組、let-7e-5p抑制劑陰性對照(AR+antagomir-NC)組和let-7e-5p抑制劑(AR+antagomir)組。除Control組外,于實驗1、7、14 d給予其余組小鼠腹腔注射200 μL含有25 μg OVA和2 mg Al(OH)3的生理鹽水混懸液進(jìn)行基礎(chǔ)致敏,第21天開始自前鼻孔給予含3% OVA的生理鹽水進(jìn)行局部激發(fā)(20 μL/鼻孔),連續(xù)14 d(第21~34天)。第28~34天,于OVA激發(fā)前3 h向AR+agomir組小鼠鼻腔內(nèi)滴入5 μmol/L的let-7e-5p agomir,向AR+antagomir組小鼠鼻腔內(nèi)滴入5 μmol/L的let-7e-5p antagomir,向AR+agomir-NC組和AR+antagomir-NC組小鼠鼻腔內(nèi)滴入等量陰性對照(10 μL/鼻孔),Control組和AR組小鼠于相同時間點給予等體積生理鹽水。實驗?zāi)π∈筮M(jìn)行變應(yīng)性鼻炎評分,然后靜脈采血,處死各組小鼠,收集鼻黏膜組織,部分用液氮凍存轉(zhuǎn)移至-80 ℃超低溫冰箱保存,部分用4 %多聚甲醛固定,用于后續(xù)實驗。

1.3 療效觀察

1.3.1 變應(yīng)性鼻炎評分 最后1次鼻腔致敏后30 min內(nèi),對各組小鼠噴嚏個數(shù)、流涕和搔鼻情況進(jìn)行評分,記錄各癥狀總分值,取平均值作為該組小鼠的癥狀得分,評分標(biāo)準(zhǔn)見表1。

1.3.2 蘇木精/伊紅(HE)染色觀察鼻黏膜組織病理學(xué)變化 鼻黏膜標(biāo)本常規(guī)脫水、透蠟、包埋,制成5 μm厚切片,依次進(jìn)行蘇木素和伊紅染色,梯度乙醇脫水、二甲苯透明、封片,顯微鏡下觀察染色效果。隨機(jī)讀取3個視野,統(tǒng)計各組小鼠鼻黏膜中嗜酸性粒細(xì)胞數(shù)量。

1.3.3 實時熒光定量PCR(real-time PCR)檢測let-7e-5p、Fas、FasL mRNA表達(dá) 使用TRIpure裂解液提取鼻黏膜總RNA,根據(jù)試劑盒說明書將RNA反轉(zhuǎn)錄成cDNA。以cDNA為模板,在real-time PCR儀上,用SYBR Green法進(jìn)行實時定量PCR。引物序列見表2。反應(yīng)條件:94 ℃預(yù)變性5 min;94 ℃變性10 s,60 ℃退火20 s,72 ℃延伸30 s,40個循環(huán)。采用2-ΔΔCt法計算let-7e-5p(U6為內(nèi)參)和Fas、FasL(β-actin為內(nèi)參)的相對表達(dá)量。

1.3.4 Western blot法檢測Fas、FasL蛋白相對表達(dá)水平 提取鼻黏膜樣本總蛋白,BCA法測定蛋白濃度,點樣、SDS-PAGE、轉(zhuǎn)印,5%脫脂奶粉封閉1 h,加入一抗Fas(1∶500)或者FasL(1∶500),4 ℃孵育過夜,洗膜后加入羊抗兔二抗IgG-HRP(1∶5 000),37 ℃孵育45 min,洗膜,噴灑增強(qiáng)化學(xué)發(fā)光(enhanced chemiluminescence,ECL)液,暗室內(nèi)曝光顯影,用Gel-Pro-Analyzer凝膠圖像處理系統(tǒng)分析蛋白條帶灰度,以β-actin為內(nèi)參,計算蛋白相對表達(dá)量。

1.3.5 ELISA法檢測炎性因子水平 小鼠眼窩靜脈采血800 μL,血樣凝集30 min,300 r/min、4 ℃離心2 min,收集血清,嚴(yán)格按照ELISA試劑盒說明書測定IgE、sIgE、IFN-γ、IL-12、IL-4、IL-13水平。測定450 nm最大吸收波長和570 nm參考波長下的光密度(OD)值,OD校準(zhǔn)值=OD450-OD570。以標(biāo)準(zhǔn)品濃度的OD值為橫坐標(biāo),校準(zhǔn)后的OD值為縱坐標(biāo),根據(jù)標(biāo)準(zhǔn)曲線計算各血清樣本中炎性因子濃度。每孔重復(fù)檢測3次,結(jié)果取平均值。

1.3.6 雙熒光素酶報告基因?qū)嶒灧治鰈et-7e-5p和靶基因的關(guān)系 通過microrna(http://www.microrna.org/microrna/getGeneForm.do)、mirdb(http://mirdb.org/)、targetscan(https://www.targetscan.org/vert_80/)數(shù)據(jù)庫預(yù)測let-7e-5p與Fas/FasL潛在的結(jié)合位點。根據(jù)預(yù)測結(jié)果分別構(gòu)建Fas 3'UTR、FasL 3'UTR的野生型(pmirGLO-Fas/FasL 3'UTR-WT)及突變型質(zhì)粒(pmirGLO-Fas/FasL 3'UTR-MT),同let-7e-5p agomir共轉(zhuǎn)染對數(shù)期293T細(xì)胞,分為NC+3'UTR-MT組、let-7e-5p agomir+3'UTR-MT組、NC+3'UTR-WT組及l(fā)et-7e-5p agomir+3'UTR-WT組,每組設(shè)置3個平行孔。轉(zhuǎn)染48 h后,應(yīng)用雙熒光素酶檢測試劑盒分析螢火蟲及海腎熒光素酶熒光強(qiáng)度,以海腎熒光素酶作為內(nèi)參,計算螢火蟲熒光素酶的相對值。

1.4 統(tǒng)計學(xué)方法 采用GraphPad Prism 7.0軟件進(jìn)行數(shù)據(jù)分析。符合正態(tài)分布的計量資料采用x±s表示,多組間比較采用單因素方差分析,組內(nèi)多重比較采用Turkey法。P<0.05為差異有統(tǒng)計學(xué)意義。

2 結(jié)果

2.1 各組小鼠變應(yīng)性鼻炎評分和炎性細(xì)胞浸潤情況比較 與Control組比較,AR組變應(yīng)性鼻炎評分升高,嗜酸性粒細(xì)胞數(shù)量增加(P<0.05);與AR+agomir-NC組比較,AR+agomir組變應(yīng)性鼻炎評分降低,嗜酸性粒細(xì)胞數(shù)量減少(P<0.05);與AR+antagomir-NC組比較,AR+antagomir組變應(yīng)性鼻炎評分升高,嗜酸粒細(xì)胞數(shù)量增加(P<0.05)。見表3。

2.2 各組小鼠鼻黏膜組織病理學(xué)變化 HE染色結(jié)果顯示,AR組小鼠鼻黏膜上皮結(jié)構(gòu)紊亂,增生明顯,基底結(jié)構(gòu)模糊;與AR+agomir-NC組比較,AR+agomir組上皮細(xì)胞排列相對整齊,偶見少量炎性細(xì)胞浸潤,基底結(jié)構(gòu)清晰;與AR+antagomir-NC組比較,AR+antagomir組鼻黏膜增厚明顯,炎性細(xì)胞浸潤嚴(yán)重,見圖1。

2.3 各組鼻黏膜中l(wèi)et-7e-5p、Fas、FasL mRNA表達(dá)變化 與Control組比較,AR組let-7e-5p mRNA表達(dá)減少,F(xiàn)as、FasL mRNA表達(dá)增加(P<0.05);與AR+agomir-NC組比較,AR+agomir組let-7e-5p mRNA表達(dá)增加,F(xiàn)as、FasL mRNA表達(dá)減少(P<0.05);與AR+antagomir-NC組比較,AR+antagomir組let-7e-5p mRNA表達(dá)減少,F(xiàn)as、FasL mRNA表達(dá)增加(P<0.05),見表4。

2.4 各組鼻黏膜中Fas、FasL蛋白表達(dá)變化 與Control組比較,AR組小鼠鼻黏膜中Fas及FasL蛋白的表達(dá)增加(P<0.05);與AR+agomir-NC組比較,AR+agomir組Fas、FasL蛋白的表達(dá)減少(P<0.05);與AR+antagomir-NC組比較,AR+antagomir組兩指標(biāo)的表達(dá)增加(均P<0.05)。見圖2、表5。

2.5 各組血清IgE、sIgE及炎性因子水平比較 與Control組比較,AR組IgE、sIgE、IL-4、IL-13水平升高,IL-12、IFN-γ水平降低(P<0.05);與AR+agomir-NC組比較,AR+agomir組IgE、sIgE、IL-4、IL-13水平降低(P<0.05),IL-12、IFN-γ水平升高(P<0.05);與AR+antagomir-NC組比較,AR+antagomir組IgE、sIgE、IL-4、IL-13水平升高(P<0.05),IL-12、IFN-γ水平差異無統(tǒng)計學(xué)意義,見表6。

2.6 let-7e-5p與靶基因Fas/FasL的調(diào)控關(guān)系 生物信息學(xué)預(yù)測分析發(fā)現(xiàn),let-7e-5p在Fas、FasL 3'-UTR區(qū)存在結(jié)合位點,見圖3、4。進(jìn)一步采用雙熒光素酶實驗進(jìn)行驗證發(fā)現(xiàn),與NC+3'UTR-WT組比較,let-7e-5p agomir+3'UTR-WT組的熒光素酶活性下降(P<0.05);與NC+3'UTR-MT組比較,let-7e-5p agomir+3'UTR-MT組的熒光素酶活性無明顯變化(P>0.05),見表7。

3 討論

miRNAs是一類長度為18~25個核苷酸的非編碼RNA,在機(jī)體生理和病理過程中發(fā)揮重要作用[9]。let-7是最早被發(fā)現(xiàn)的miRNA之一,可以通過調(diào)節(jié)促炎因子IL-13、IL-6等發(fā)揮抗炎作用[10]。Let-7e-5p是let-7家族中的一員,在過敏性鼻炎、非過敏性鼻炎及哮喘患者鼻黏膜組織中的表達(dá)降低[11]。有研究顯示,let-7e-5p可通過靶向細(xì)胞因子信號傳導(dǎo)抑制因子(suppressor of cytokine signaling 4,SOCS4)調(diào)節(jié)JAK1/信號轉(zhuǎn)導(dǎo)與轉(zhuǎn)錄激活因子3(signal transducer and activator of transcription 3,STAT3)的信號活性,抑制IL-13誘導(dǎo)的鼻上皮細(xì)胞炎癥反應(yīng)[8]。然而,有關(guān)AR小鼠中的let-7e-5p作用機(jī)制研究鮮見。本研究結(jié)果顯示,let-7e-5p在AR小鼠鼻黏膜組織中的表達(dá)較Control組降低,與AR+agomir-NC組比較,AR+agomir組小鼠變應(yīng)性鼻炎評分下降,鼻黏膜嗜酸性粒粒細(xì)胞數(shù)量減少,血清IgE、sIgE水平下降;而與AR+antagomir-NC組比較,AR+antagomir組小鼠變應(yīng)性鼻炎評分升高,證實了let-7e-5p表達(dá)降低參與AR發(fā)病,其高表達(dá)可以改善AR小鼠過敏癥狀。

依據(jù)經(jīng)典免疫學(xué)說,AR是體外環(huán)境因素作用于機(jī)體導(dǎo)致Th1/Th2免疫失衡而引起的以鼻黏膜Th2免疫反應(yīng)為主的變應(yīng)性炎癥反應(yīng)[12-13]。有研究發(fā)現(xiàn),在MOG35–55多肽誘導(dǎo)的CD4+ T細(xì)胞模型中,let-7e-5p模擬物(mimics)促進(jìn)細(xì)胞向Th1型分化,抑制其向Th2型分化,同時IFN-γ水平升高,IL-4水平降低[14]。在自身免疫性甲狀腺疾病患者外周血單核細(xì)胞中,let-7e-5p的表達(dá)與IL-10呈負(fù)相關(guān)[15],而IL-10可促進(jìn)Th2細(xì)胞分化,抑制Th1型免疫反應(yīng)[16]。本研究結(jié)果顯示,與AR+agomir-NC組比較,AR+agomir組小鼠血清中Th2細(xì)胞因子IL-4、IL-13水平下降,Th1細(xì)胞因子IFN-γ、IL-12水平升高;而與AR+antagomir-NC組比較,AR+antagomir組IL-4、IL-13水平升高,IFN-γ、IL-12水平無明顯變化,表明let-7e-5p可能通過調(diào)節(jié)Th1/Th2細(xì)胞失衡,從而參與AR發(fā)病。

Fas和FasL屬于腫瘤壞死超家族成員,是控制細(xì)胞凋亡的重要傳導(dǎo)通路,參與調(diào)控外周血T細(xì)胞分化[17-18]。有研究顯示,F(xiàn)as/FasL通路活化可促進(jìn)炎性細(xì)胞因子分泌,介導(dǎo)免疫逃逸[19]。Zhou等[20]研究證實,T-524通過抑制Fas/FasL通路活性,從而抑制炎癥反應(yīng)和肺組織細(xì)胞凋亡,改善呼吸機(jī)誘導(dǎo)的急性肺損傷。此外,F(xiàn)as和FasL引起的細(xì)胞凋亡參與AR發(fā)病過程[21]。本研究通過生物信息學(xué)分析發(fā)現(xiàn),F(xiàn)as和FasL是let-7e-5p的潛在靶基因,提示let-7e-5p很可能靶向調(diào)節(jié)Fas/FasL來參與AR進(jìn)展。為驗證上述假設(shè),本研究在對let-7e-5p進(jìn)行過表達(dá)和沉默的基礎(chǔ)上,檢測Fas及FasL的表達(dá),并應(yīng)用雙熒光素酶實驗驗證let-7e-5p是否靶向調(diào)節(jié)Fas和FasL。結(jié)果顯示,與Control組比較,F(xiàn)as、FasL在AR組小鼠鼻黏膜組織中的表達(dá)增加;與AR+agomir-NC組比較,AR+agomir組過Fas、FasL的表達(dá)減少;而與AR+antagomir-NC組比較,AR+antagomir組Fas、FasL的表達(dá)增加,表明let-7e-5p直接影響Fas和FasL表達(dá)。此外,雙熒光素酶實驗結(jié)果顯示,let-7e-5p agomir+3'UTR-WT組的熒光素酶活性較NC+3'UTR-WT組明顯降低,證實了let-7e-5p直接靶向結(jié)合Fas和FasL。

綜上所述,let-7e-5p通過結(jié)合Fas/FasL 3'UTR區(qū)并抑制其表達(dá),從而影響Th1/Th2細(xì)胞平衡及相關(guān)炎性因子釋放,參與AR發(fā)病和進(jìn)展過程。本研究進(jìn)一步闡明了AR發(fā)病機(jī)制,為臨床治療提供了新型理論依據(jù)和分子靶點。

參考文獻(xiàn)

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(2022-07-14收稿 2022-09-22修回)

(本文編輯 陸榮展)

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