Clinical study of inflammatory factors in sputum induced early after lung volume reduction surgery

Background The aim of this study was to prospectively study the changes in neutrophil elastase （NE）, fibroblast growth factor 9 （Fgf9）, matrix metalloproteinase-9 （MMP-9）, tissue inhibitor of metalloproteinase 1 （TIMP-1） in sputum induced during the early period after lung volume reduction surgery （LVRS）. Methods From April to October 2005, ten consecutive patients with chronic obstructive pulmonary disease （COPD） underwent LVRS. Ten non-small cell lung cancer patients （stage II-Illa） received Iobectomy as a control group. The induced sputum was collected from both groups at six different times （two weeks before operation and postoperatively at 1, 2, 4, 6 and 10 days）. The level of NE, Fgf9, MMP-9 and TIMP-1 were measured using enzyme-linked immunosorbent assay. Results The pulmonary function （FEV~%） and arterial blood gases （PaO2 and PaCO2） were significantly different belween the groups. There were no significant differences in age, ejection fraction （EF）, and operation duration, but hemoglobin in the LVRS group was statistically higher than in the controls. At certain times, there were significant differences in NE, MMP-9, TIMP-1 and MMP-9/TIMP-1 （P 〈0.05） but not in Fgf9 between the two groups. The levels of NE and TIMP-1 were maximal at 2 days postoperatively and that of MMP-9 and MMP-9/TIMP-1 at 4 days postoperatively in the LVRS group. In the control group, maximal levels of NE and TIMP-1 occurred at 2 days postoperatively and that of MMP-9 and MMP-9/TIMP-1 at 1 day postoperatively. Ten days after surgery, all values of the control group were not significantly different from the baseline. In the LVRS group, the levels were significantly different from the pre-operative values （P 〈0.05） apart from TIMP-1. Conclusion The levels of NE, MMP-9, TIMP-1 and MMP-9/TIMP-1 of the LVRS group were different from those of the control group. The time course of these chanties may be related to LVRS and the underlying process of COPD.     

The regulating role of mutant IκBα in expression of TIMP-2 and MMP-9 in human glioblastoma multiform

Background Our previous studies demonstrated that mutant IKBα （IKBαM） inhibited the occurrence, growth and angiogenesis of human glioblastoma multiform （GBM）. However, the specific mechanism by which IKBaM regulates protein-degrading enzymes secreted from GBM to inhibit invasion and metastasis has remained unclear. The aim of the present study was to investigate the regulatory role and significance of IKBαM genes in the expression of tissue inhibitor of metalloproteinase （TIMP）-2 and matrix metalloproteinase （MMP）-9 in human GBM. Methods We established the following four GBM cell lines stably expressing IKBaM by plasmid construction, gene transfection and screening for IKBαM protein expression： mutant IKBa-transfected cells （G36A-M）, wild-type IKBa-transfected cells （G36A-W）, empty plasmid transfected cells （G36A-P） and untransfected cells （G36A）. The TIMP-2 and MMP-9 expression was detected by RT-PCR and Western blotting. Tumor cells were then implanted subcutaneously into nude mice to establish an animal model of ectopic tumor growth, and TIMP-2 and MMP-9 expression was determined by immunohistochemical methods. Results The results showed that there was a significant increase in TIMP-2 expression and a significant decrease in MMP-9 expression in the G36A-M group at both the RNA and protein levels compared with the G36A-W group, G36A-P group and G36A group. Similar results were observed in the immunohistochemical staining analysis of tumor tissues. In the G36A-M group, TIMP-2 expression was significantly higher while MMP-9 expression was significantly lower than in the other three groups. Conclusions Our findings indicate that IKBaM inhibits the activation of NF-KB. It significantly up-regulates TIMP-2 expression in human malignant glioma cells and down-regulates the expression of MMP-9. Thus, IKBαM maintains the integrity of the extracellular matrix and further inhibits the growth and metastasis of tumor tissues. Chin Med J 2009; 122（2）：205-211     

Effects of Bone Marrow-derived Mesenchymal Stem Cells on TGF-β and MCP-1 in Injured Lung of Rats

The primary objective of the present study is to investigate the therapeutic effect of bone marrow-derived mesenchymal stem cells （MSCs） on bleomycin （BLM）-induced lung injury of rats and the effect on transforming growth factor-β （TGF-β） and monocyte chemoattractant protein-1 （MCP-1）. MSCs were isolated from SD rats. The recipients rats were divided randomly into four groups： lung injury group, MSC treatment group, MSC control group and normal control group. Rats of lung injury group and MSC treatment group were perfused with BLM of 5mg/kg （0.2-0.3ml） intratracheally, others were perfused with normal saline. After twelve hours, rats of MSC treatment group and MSC control group were injected MSCs of 0.5×10^6per rat into tail vein. Haematoxylin-eosin staining was used to observe the morphology in lung tissue. ELISA was used to detect the contents of TGF-β and MCP-1 in serum and bronchoalveolar lavage fluid （BALF）. Collagen content of the lung tissue was assessed by hydroxyproline （HYP） concentration. It was found that the thickness of alveolar wall and lung interstitium were significantly reduced in the rats of MSC treatment group compared with the lung injury group. HYP content in lung interstitium, TGF-β and MCP-1 in serum and BALF were increased significantly in rats of lung injury group two weeks after BLM perfusion, but they were reduced significantly in the rats of MSC treatment group compared with the injured rats. These observations provide evidence that MSCs engraftment could alleviate bleomycin-induced lung injury and fibrosis in rats and the therapeutic effects might relate with the decrease of TGF-β and MCP-1.     

Expression of MMP-9 and TIMP-1 in Lesions of Systemic Sclerosis and Its Implications

In order to investigate the role of MMP-9 and TIMP-1 in the pathogenesis of systemic sclerosis, the expression of MMP-9 and TIMP-1 was immunohistochemically detected in skin lesions of the patients with diffuse cutaneous systemic sclerosis, skin lesions of the patients with limited cutaneous systemic sclerosis, and skin tissues of normal subjects. The results showed that the expression of MMP-9 in lesions of diffuse cutaneous systemic sclerosis was significantly lower than that of normal skins （P〈0.05）. However, no significant difference in the level of MMP-9 in the limited cutaneous systemic sclerosis and normal skin was found. Meanwhile, the expression of TIMP-1 in lesions of diffuse cutaneous systemic sclerosis and limited cutaneous systemic sclerosis were significantly higher than that of normal skins （both P〈0.05）. It was suggested that the expression of MMP-9 and TIMP-1 might play an important role in the development of systemic sclerosis.     

Effects of Murine Cytomegalovirus Infection on Sperm Viability in Mice

In order to explore the effects of testicular infection of murine cytomegalovirus （MCMV） on mature sperm viability at different periods following MCMV inoculation in mice, 91 BALB/c mice without MCMV infection were randomly divided into two groups： an experimental group （n= 56） and a control group （n=35）. The mice in the experimental group were treated by inoculating MCMV intratesticularly, while those in the controlled group were directly inoculated with DMEM without MCMV. The mice in both groups were sacrificed separately on the day 1,1.5, 2, 4, 6, 9 and 14 post-inoculation （D1, 1.5, 2, 4, 6, 9 and 14 PI）. The MCMV M83 mRNA gene was detected in the testis by in situ hybridization （ISH） with MCMV late-mRNA probe labeled with digoxin. Sperm viability of mature sperm in the epididymis cauda was measured. The results demonstrated the positive signal of ISH of MCMV was found mainly in the cytoplasm of the testicular interstitial cells and spermatogenic cells in the experimental group. Compared with that in the controlled group, the sperm viability in the experimental group was decreased significantly on D1 PI and D1.5 PI （P〈 0.05）. No statistically significant difference in the sperm viability was found after D2 PI between two groups （P〉0.05）. This suggested that sperm viability in mice might be descended significantly shortly after MCMV infection and might return to normal with time, indicating that MCMV acute infection might temporarily degrade sperm quality and influence procreation transiently.     

Expression of matrix metalloproteinase and its tissue inhibitor in haemangioma

The action mechanism of matrix metalloproteinases-2 （MMP-2） and tissue inhibitor of metalloproteinases-2 （TIMP-2） in the genesis, development and degeneration of haemangioma was investigated by detecting their expression in the tissue of haemangioma in different phases by using the immunohistochemistry. Fifty paraffin-embedded specimens of skin capillary haemangioma were collected, which were documented in the Department of Pathology, Renmin Hospital of Wuhan University from 2000 to 2006. All samples were stained by regular HE method, and proliferative cell nuclear antigen （PCNA） was tested by immunohistochemical S-P method. The samples were classified according to the Mulliken criteria and the expression pattern of PCNA. Immunohistochemical S-P method was ap- plied to detect the expression of MMP-2 and TIMP-2 in proliferative and degenerative phases of cutaneous capillary haemangioma, and in normal skin tissues. In combination with the detection of the expression of factor Ⅷ-related antigen, it was verified that in haemangioma tissues, the cells expressing MMP-2 and TIMP-2 were vascular endothelial cells. The MMP-2 and TIMP-2 expression was quantitatively analyzed by image analysis system （HPIAS-1000）, and one-way ANOVA（107） and SNK（q） test were done to analyze average absorbance （A） and positive area rate of immunohistochemically positive particles by using SPSS11.5. The results showed： （1） Among 50 samples of haemangioma, there were 26 proliferative haemangiomas, and 24 degenerative haemangiomas, respectively; （2） The expression of MMP-2 was weak in normal vascular endothelial cells, cytoplasm of connective tissues and extracellular matrix around blood vessels. The expression of MMP-2 in proliferative group was significantly higher than in degenerative group and control group （normal skin） （P〈0.05）, but there was no statistically significant difference between the latter two groups; （3） TIMP-2 was highly expressed in normal tissues, degenerative vascular endothelial cells, cytoplasm of connective tissues and extracellular matrix around blood vessels. The expression level of TIMP-2 in proliferative phase was significantly lower than in degenerative phase （P〈0.05）, and the expression of TIMP-2 in proliferative phase was significantly different from that in degenerative phase and normal tissues （P〈0.05）. It was concluded that in proliferative phase of haemangioma, MMP-2 may promote over-proliferation of endothelial cells of haemangioma, and in degenerative phase, TIMP-2 can inhibit the proliferation of endothelial cells of haemangioma. The two substances play important roles in the genesis, development and degeneration of haemangiomas.     

Acute lung injury induced by H9N2 virus in mice

Background H9N2 avian influenza viruses （AIVs） have repeatedly caused infections in mammals even humans in many countries. The purpose of our study was to evaluate the acute lung injury （ALl） caused by H9N2 viral infection in mice. Methods Six- to eight- week-old female SPF C57BL/6 mice were infected intranasally with lx104 MIDso of A/HONG KONG/2108/2003 [H9N2 （HK）] virus. Clinical signs, pathological changes, virus titration in tissues of mice, arterial blood gas, and cytokines in bronchoalveolar lavage fluid （BALF） and serum were observed at different time points after AIV infection. Results H9N2-AIV-infected mice exhibited severe respiratory syndrome, with a mortality rate of 50%. Lung histopathological changes in infected mice included diffuse pneumonia, alveolar damage, inflammatory cellular infiltration, interstitial and alveolar edema, and hemorrhage. In addition, HgN2 viral infection resulted in severe progressive hypoxemia, lymphopenia, and a significant increase in interleukin 1, interleukin 6, tumor necrosis factor, and interferon in BALF and serum. Conclusions The results suggest that H9N2 viral infection induces a typical ALl in mice that resembles the common features of ALl. Our data may facilitate the future studies of potential avian H9N2 disease in humans.     

基质金属蛋白酶及其抑制剂在RSV感染诱发哮喘中的作用

目的 本研究通过观察RSV感染致敏小鼠MMP-9和TIMP-1的表达与肺组织病理的变化,探讨RSV感染诱发哮喘发作的发病机制.方法 分3组,分别是安慰剂（生理盐水）对照组、RSV感染小鼠模型组、OVA致敏小鼠模型组,分别作免疫组织化学染色（SP法）和HE,染色观察肺组织病理变化观测MMP-9 mRNA、TIMP-1mRNA的表达.结果 本实验观察到RSV感染小鼠模型组呼吸道组织MMP-9高表达,TIMP-1亦随之有所升高,以MMP-9的表达升高为主,两者比值较安慰剂对照组升高.病理上表现为炎症细胞的浸润为主.而OVA致敏组则表现为TIMP-1过度表达,两者比值较安慰剂对照组降低,病理上出现气道基质增生,纤毛上皮剥落,气道壁纤维化.免疫组化结果显示RSV感染致敏组MMP-9为13312.3±4462.5,TIMP-1为4481.8±2320.3,OVA致敏组MMP-9为4590.8±2320.3,TIMP-1为7477.5-2205.8,两者差异有统计学意义（P＜0.01）.结论 MMP-9和TIMP-1两者的平衡是气道黏膜生理中的关键因素,当RSV感染导致气道炎症时,MMP-9和TIMP-1两者的平衡被打破,MMP-9高表达,而此后机体对MMP-9和TIMP-1平衡的调节导致TIMP-1随之持续升高最终使气道黏膜高反应性甚至气道黏膜重塑,这可能就是RSV感染诱导哮喘发生发展的重要疾病机制.     

多西环素对大鼠体外循环后肺内MMP-9和TIMP-1活性和基因表达的影响

目的：探讨多西环素对大鼠体外循环后肺内基质金属蛋白酶-９和组织基质金属蛋白酶抑制剂-1活性和基因表达的影响。方法：健康雄性SD大鼠３６只随机分为对照组（A组）、体外循环组（B组）和治疗组（C组）,分别于手术结束时（T1）和手术结束后6小时（T2）收集支气管肺泡灌洗液（BALF）和肺组织标本。Western-blot法测定BALF中MMP-9和TIMP-1的蛋白活性,RT-PCR法测定肺组织MMP-9和TIMP-1mRNA的表达。结果：治疗组大鼠肺组织水肿减轻,BALF的中性粒细胞减少;CPB组BALF中MMP-9活性明显升高,CPB后6小时表达最强,治疗组MMP-9活性较CPB组有明显下降,TIMP-1的活性在CPB组和治疗组于CPB结束后呈较弱的增强趋势,两组间相同时间点的表达差异不明显;CPB组和治疗组MMP-9mRNA表达增强,但治疗组MMP-9mRNA的表达在相应时间点较治疗组下降;TIMP-1mRNA在治疗组表达增强,且T２时间点显著增强;MMP-9/TIMP-1mRNA在CPB组和治疗组均有显著增大,但治疗组中T2时间点组MMP-9/TIMP-1mRNA比值较CPB组明显下降。结论：CPB可以引起大鼠术后肺内MMP-9的活性和基因表达增强,导致术后早期肺内MMP-9/TIMP-1mRNA表达失衡,多西环素可以抑制CPB后大鼠肺组织内MMP-9蛋白水平和mRNA的表达,还可能上调TIMP-1的表达而间接抑制MMP-9mRNA表达,改善MMP-9/TIMP-1的比例失衡。     

多西环素对大鼠体外循环后肺内MMP-9和TIMP活性和基因表达的影响

目的:探讨多西环素对大鼠体外循环后肺内基质金属蛋白酶-9(MMP-9)和组织基质金属蛋白酶抑制剂-1(TIMP-1)活性和基因表达的影响?方法:健康雄性SD大鼠36只随机分为对照组?体外循环组(CPB组)和治疗组,分别于手术结束时(T1)和手术结束后6 h(T2)收集支气管肺泡灌洗液(BALF)和肺组织标本?Western blot法测定BALF中MMP-9和TIMP-1的蛋白活性,RT-PCR法测定肺组织MMP-9和TIMP-1 mRNA的表达?结果:治疗组大鼠肺组织水肿减轻,BALF的中性粒细胞减少;CPB组BALF中MMP-9活性明显升高,CPB后6 h表达最强,治疗组MMP-9活性较CPB组有明显下降,TIMP-1的活性在CPB组和治疗组于CPB结束后呈较弱的增强趋势,两组间相同时间点的表达差异不明显;CPB组和治疗组MMP-9mRNA表达增强,但治疗组MMP-9 mRNA的表达在相应时间点较治疗组下降;TIMP-1 mRNA在治疗组表达增强,且T2时间点显著增强;MMP-9/TIMP-1 mRNA在CPB组和治疗组均有显著增大,但治疗组中T2时间点MMP-9/TIMP-1 mRNA比值较CPB组明显下降?结论:CPB可以引起大鼠术后肺内MMP-9的活性和基因表达增强,导致术后早期肺内MMP-9/TIMP-1 mRNA表达失衡,多西环素可以抑制CPB后大鼠肺组织内MMP-9蛋白水平和mRNA的表达,还可能上调TIMP-1的表达而间接抑制MMP-9 mRNA表达,改善MMP-9/TIMP-1的比例失衡?     

IL-33在呼吸道合胞病毒(RSV)感染致哮喘急性发作中的作用

 目的 研究IL-33在呼吸道合胞病毒（respiratory syncytial virus,RSV）感染致哮喘急性发作中的作用。方法 将24只3周龄SPF级BALB/c雌性小鼠随机分为PBS组、RSV组、卵清白蛋白（ovalbumin,OVA）组和OVA/RSV组,每组6只。首先应用OVA或PBS激发并致敏小鼠,再感染RSV致哮喘急性发作。麻醉后处死小鼠。ELISA法测小鼠血清总IgE水平、支气管肺泡灌洗液（bronchoalveolar lavage fluid,BALF）及肺组织IL-33蛋白水平;瑞氏/吉姆萨染色后测BALF细胞总数及各细胞分类计数;取肺组织病理切片HE染色;real-time PCR测T辅助细胞2型（T helper 2,Th2）细胞因子、IL-33等mRNA表达。结果 OVA组与PBS组相比,血清IgE水平明显升高（P<0.05）。OVA/RSV组中BALF细胞总数较OVA组显著增加,主要表现为巨噬细胞和中性粒细胞的增加。病理切片HE染色可见OVA/RSV组小气道周围炎性细胞浸润更加明显。以上表明RSV感染OVA诱导哮喘急性发作的小鼠模型成功建立。real-time PCR显示：与OVA组相比,OVA/RSV组IL-13以及IL-33 mRNA表达显著增加（P<0.05）,IL-5和ST2表达有所增加,但差异无统计学意义。ELISA结果显示：与OVA组相比,OVA/RSV组肺组织中IL-33浓度增高更加显著（P<0.05）,BALF中IL-33浓度也有所增加,但差异无统计学意义。结论 IL-33可能通过启动Th2型免疫反应在RSV感染诱导哮喘急性发作小鼠模型中起重要作用。     

Activity of Matrix Metalloproteinase in Airway Epithelial Cells of COPD Patients

Chronic obstructive pulmonary disease(COPD) is characterized by the air flow limitationthat is progressive and not fully reversible. Thecondition is believed to be associated with the ab normal inflammatory responses of lung to theharmful gases and particles. The exact mechanismof COPD is not completely understood and itspathological features included chronic inflammationof bronchi, small airway disease and serious cen tro lobular emphysema[1]. The pulmon…     

重组骨桥蛋白通过抑制核因子κB和基质金属蛋白酶2和9减轻高氧急性肺损伤

目的研究吸入重组骨桥蛋白（r-OPN）对高氧急性肺损伤的作用及其机制。方法将96只小鼠按随机数字表法分为PBS处理组和r—OPN处理组,每组中12只小鼠置于室内空气中作为对照,其余小鼠置于浓度大于95％的氧气室中,各组分别于24、48和72h取出12只小鼠评价肺损伤严重程度;逆转录．聚合酶链反应（RT—PCR）法检测肺组织核因子κB（NF-κB）和基质金属蛋白酶2（MMP-2）、MMP-9及其抑制剂TIMP-1、TIMP-2的mRNA表达;免疫组化染色检测肺组织NF-κB蛋白的表达和组织分布。结果长时间暴露于高氧能够引起急性肺损伤。暴露于高氧环境72h后,PBS处理组小鼠较r．OPN处理组小鼠发生更严重的肺损伤。RT—PCR结果显示PBS处理组小鼠肺组织NF．κBmRNA在暴露于高氧48h和72h后表达量较同时段r-OPN处理组明显增加（0．54±0．03比0．21±0．08,0．57±0．07比0．34±0．01,均P〈0．05）。r—OPN处理组小鼠在暴露于高氧72h后TIMP-1mRNA表达较PBS处理组明显增加（0．89±0．09比0．62±0．12,P〈0．05）,在暴露于高氧48h和72h后TIMP-2mRNA表达较PBS处理组明显增加（0．85±O．11比0．59±0．23,P〈0．01;0．88±0．16比0．56±0．13。P〈0．01）。免疫组化结果显示PBS处理组小鼠在暴露于高氧72h后气道上皮NF·κB蛋白表达明显高于r-OPN处理组（53．26±4．70比32．53±7．28,P〈0．05）。结论r-OPN可通过抑制NF-κB表达及促进TIMPs的表达来抑制MMPs的释放和激活,从而减轻高氧所致的急性肺损伤。     

基质金属蛋白酶/组织金属蛋白酶抑制物表达失衡在衰老大鼠肾小管间质损害中的意义

目的研究基质金属蛋白酶(MMP)及组织金属蛋白酶抑制物(TIMP)在不同鼠龄的单侧输尿管梗阻(UUO)大鼠肾小管间质中的表达变化,探讨其可能的作用.方法选用3月、26月龄大鼠制备UUO模型,采用组织病理及逆转录-聚合酶链反应(RT-PCR)、Western印迹等方法观察UUO术后3、7、14 d不同鼠龄大鼠的肾脏组织学改变和MMP-2、MMP-9、TIMP-1、TIMP-2等在梗阻肾小管间质中的表达情况;用明胶酶谱法检测UUO术后不同时间点MMP-2、MMP-9的蛋白水解活性.结果在对照组,TIMP-1、TIMP-2仅微弱表达于3月龄肾脏中,而在26月龄大鼠肾脏中其表达显著增加(P<0.01);老年鼠肾组织中MMP-2、MMP-9的蛋白水解活性显著低于3月龄大鼠(P<0.01).与对照组相比,3月龄、26月龄大鼠梗阻侧肾脏的肾小管间质纤维化面积随UUO术后时间的延长而增加,TIMP-1、TIMP-2及MMP-2、MMP-9的mRNA及蛋白质的表达在术后各时间点均显著增高(P<0.01), MMP-2和MMP-9的蛋白水解活性随UUO术后时间的延长而逐渐下降.其活性的下降与TIMP-2及TIMP-1蛋白质表达的增加呈明显的负相关.与3月龄鼠比较,26月龄鼠肾小管间质纤维化面积在UUO术后各时间点也明显增加(P<0.01),TIMP-1、TIMP-2在肾组织中各时间点的mRNA及蛋白质表达均显著增高(P<0.01),MMP-2、MMP-9的蛋白水解活性在各时间点均显著下降(P<0.01).结论衰老引起的TIMP的高表达及MMP蛋白水解活性下降可能是使衰老大鼠肾小管间质损害加重的重要因素之一.     

MMP-9和TIMP-1在新生大鼠持续高氧暴露后肺组织中的动态表达

目的:探讨基质金属蛋白酶9(MMP-9)和金属蛋白酶组织抑制剂1(TIMP-1)在高氧致慢性肺疾病(CLD)新生大鼠肺组织中的动态变化和意义。方法:足月新生大鼠生后12h分别持续吸入0.90～0.95的高氧和空气,于1,3,7,14,21d应用免疫组化和RT-PCR方法分别检测肺组织MMP-9和TIMP-1蛋白及mRNA表达。结果:MMP-9在高氧3d时蛋白和mRNA表达均较空气组增强(P<0.05,P<0.01);TIMP-1蛋白在高氧组表达高于空气组,3d和7d比较P<0.05,14d和21d比较P<0.01;TIMP-1 mRNA水平高氧组高于空气组,3d和7d比较P<0.05,和14d比较P<0.01,和21d比较无差异。结论:高氧暴露后MMP-9和TIMP-1的表达在不同阶段的变化不一致,MMP-9/TIMP-1平衡状态遭到破坏,可能是高氧后胶原异常沉积以及正常肺泡化过程受阻的重要因素。     

金屏汤预防免疫力低下小鼠模型呼吸道合胞病毒感染的实验探究

  目的  探讨金屏汤(JP)对免疫力低下小鼠的免疫调节作用及继发呼吸道合胞病毒(RSV)感染的预防效果。  方法  将90只Balb/c小鼠随机分为空白对照组,模型组,匹多莫德(0.3 g·kg-1)组,金屏汤高剂量(55.2 g·kg-1)组、中剂量(27.6 g·kg-1)组、低剂量(13.8 g·kg-1)组, 每组15只。通过腹腔注射地塞米松构建免疫力低下小鼠模型, 分别以生理盐水,匹多莫德以及高、中、低剂量金屏汤灌胃7 d后, 滴鼻感染RSV, 空白组滴鼻等体积生理盐水。记录小鼠体质量, 拍照记录脾脏体积, 流式细胞术检测脾脏、肠系膜淋巴结、肺组织中免疫细胞亚群CD4+T、CD8+T、NK、DC比例; qPCR法检测肺部病毒载量,干扰素(Interferon, IFN)-β、干扰素刺激基因(Interferon stimulating gene, ISG)15 mRNA表达水平; HE染色评估肺组织病理学改变; 流式细胞术检测肺泡灌洗液(BALF)中淋巴细胞浸润及肺组织中活化CD8+T细胞(CD8+CD69+T)、记忆性T细胞比例变化。  结果  金屏汤显著恢复了模型小鼠体质量及肠系膜淋巴结、肺组织中CD8+T、NK、DC细胞的比例(P < 0.05, P < 0.01);qPCR结果提示, 与模型组相比, 金屏汤可降低小鼠肺部RSV载量, 提高IFN-β、ISG15 mRNA的表达(P < 0.05, P < 0.01, P < 0.001);流式细胞术结果显示, 与模型组相比, 金屏汤组小鼠肺组织淋巴细胞浸润显著减少(P < 0.01);HE染色及流式细胞检测结果提示, 与模型组相比, 金屏汤组可改善小鼠肺组织病理学形态, 同时促进CD8+T细胞活化, 增加记忆性T细胞的比例(P < 0.01)。  结论  金屏汤可提高模型小鼠免疫力, 同时可通过提高Ⅰ型干扰素及CD8+T细胞介导的抗病毒免疫应答, 有效预防RSV感染, 缓解肺部炎症病理损害, 并增强RSV感染后的免疫记忆。