Rhinovirus infection results in increased release of inflammatory mediators from airway epithelial cells in asthma. As an antioxidant, lycopene offers protection from adverse effects of inflammation. The aim of this study was to find an appropriate method of lycopene enrichment of airway epithelial cells and to determine the effects of lycopene enrichment on the inflammatory response of cells infected by rhinovirus or exposed to lipopolysaccharide. Lycopene enrichment of airway epithelial cells using solubilisation in tetrahydrofuran versus incorporation in liposomes was compared. After determining that solubilisation of lycopene in tetrahydrofuran was the most suitable method of lycopene supplementation, airway epithelial cells (Calu-3) were incubated with lycopene (dissolved in tetrahydrofuran) for 24 h, followed by rhinovirus infection or lipopolysaccharide exposure for 48 h. The release of interleukin-6, interleukin-8 and interferon-gamma induced protein-10 (IP-10) and their messenger RNA levels were measured using enzyme linked immunosorbent assay and reverse transcription polymerase chain reaction, respectively. Viral replication was measured by tissue culture infective dose of 50% assay. Lycopene concentration of cells and media were analysed using high-performance liquid chromatography. Preincubation of airway epithelial cells with lycopene (dissolved in tetrahydrofuran) delivered lycopene into the cells and resulted in a 24% reduction in interleukin-6 after rhinovirus-1B infection, 31% reduction in IP-10 after rhinovirus-43 infection and 85% reduction in rhinovirus-1B replication. Lycopene also decreased the release of IL-6 and IP-10 following exposure to lipopolysaccharide. We conclude that lycopene has a potential role in suppressing rhinovirus induced airway inflammation.

译文

鼻病毒感染导致哮喘中气道上皮细胞炎症介质的释放增加。番茄红素作为一种抗氧化剂,可以保护免受炎症的不良影响。这项研究的目的是找到一种合适的富集气道上皮细胞的番茄红素的方法,并确定富集番茄红素对鼻病毒感染或暴露于脂多糖的细胞的炎症反应的影响。比较了在四氢呋喃中的增溶与掺入脂质体中的番茄红素对气道上皮细胞的富集。确定番茄红素在四氢呋喃中的增溶是最合适的番茄红素补充方法后,将气道上皮细胞(Calu-3)与番茄红素(溶于四氢呋喃中)孵育24小时,然后鼻病毒感染或脂多糖暴露48小时。使用酶联免疫吸附法和逆转录聚合酶链反应分别测量白介素6,白介素8和干扰素-γ诱导的蛋白10(IP-10)的释放及其信使RNA水平。通过50%组织培养物感染剂量测定病毒复制。使用高效液相色谱法分析细胞和培养基中番茄红素的浓度。用番茄红素(溶解于四氢呋喃中)对气道上皮细胞进行预温育,将番茄红素递送到细胞中,导致在鼻病毒1B感染后白细胞介素6减少24%,在鼻病毒43感染后IP-10减少31%,减少85%在鼻病毒1B复制中。番茄红素还降低了脂多糖暴露后IL-6和IP-10的释放。我们得出结论,番茄红素在抑制鼻病毒引起的气道炎症中具有潜在作用。

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