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IL-25 induces airways angiogenesis and expression of multiple angiogenic factors in a murine asthma model.

Yao X, Wang W, Li Y, Huang P, Zhang Q, Wang J, Wang W, Lv Z, An Y, Qin J, Corrigan CJ, Huang K, Sun Y, Ying S - Respir. Res. (2015)

Bottom Line: An in house assay was also utilised to compare the effects of IL-25 and other Th2-cytokines on angiogenesis by human vascular endothelial cells.Repetitive intranasal challenge with IL-25 alone or OVA alone in OVA-presensitised animals significantly increased peribronchial vWF (+) vessels in the murine airways, which was associated with remarkably elevated expression of amphiregulin, angiogenin, endothelin-1, bFGF, EGF, IGF-1, VEGF and ERG.The data suggest that chronic exposure of murine airways to IL-25 alone is able to reproduce a local angiogenic milieu.

View Article: PubMed Central - PubMed

Affiliation: Department of Respiratory Medicine, Beijing Tongren Hospital, Capital Medical University, Beijing, People's Republic of China. yaoxiujuanhello@163.com.

ABSTRACT

Background: Th2-promoting cytokine IL-25 might contribute to bronchial mucosal vascular remodelling in asthma through its receptor expressed by vascular endothelial and vascular smooth muscle cells.

Methods: By utilising a newly established chronic asthma murine model induced by direct exposure of the airways to IL-25 alone, we examined effects of IL-25 on angiogenesis, vascular remodelling and expression of angiogenic factors, compared changes with those in a "classical" ovalbumin (OVA)-induced murine asthma model. IL-25 and OVA were intranasally instilled into the airways of BALB/c mice for up to 55 days. Airways vessels and angiogenic factors, including Von Willebrand Factor (vWF), amphiregulin, angiogenin, endothelin-1, transcription factor ERG, basic fibroblast growth factor (bFGF), epidermal growth factor (EGF), insulin-like growth factor (IGF-1) and vascular endothelial growth factor (VEGF) in lung sections, homogenates and BAL fluid were detected and quantified by immunostaining or enzyme linked immunosorbent assay (ELISA). An in house assay was also utilised to compare the effects of IL-25 and other Th2-cytokines on angiogenesis by human vascular endothelial cells.

Results: Repetitive intranasal challenge with IL-25 alone or OVA alone in OVA-presensitised animals significantly increased peribronchial vWF (+) vessels in the murine airways, which was associated with remarkably elevated expression of amphiregulin, angiogenin, endothelin-1, bFGF, EGF, IGF-1, VEGF and ERG. IL-25, but not Th-2-cytokines induced human angiogenesis in vitro.

Conclusions: The data suggest that chronic exposure of murine airways to IL-25 alone is able to reproduce a local angiogenic milieu. Thus, blocking IL-25 may attenuate vascular remodelling and improve outcomes in asthma patients.

No MeSH data available.


Related in: MedlinePlus

IL-25 induced airways IGF-1 expression. A: Representative photomicrographs of insulin-like growth factor 1 (IGF-1) immunoreactivity in lung sections from saline (NS)-, OVA- and IL-25-challenged mice at various time points as indicated (original magnification x20). B: Quantitative analysis of IGF-1 immunoreactivity. The data were collected from 3 independent experiments and are expressed as the mean ± SEM (n = 5 in each group at each time point). *p < 0.05.
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Fig5: IL-25 induced airways IGF-1 expression. A: Representative photomicrographs of insulin-like growth factor 1 (IGF-1) immunoreactivity in lung sections from saline (NS)-, OVA- and IL-25-challenged mice at various time points as indicated (original magnification x20). B: Quantitative analysis of IGF-1 immunoreactivity. The data were collected from 3 independent experiments and are expressed as the mean ± SEM (n = 5 in each group at each time point). *p < 0.05.

Mentions: Immunoanalysis showed that IL-25, as compared with saline challenge of the airways significantly increased the expression of lung and peribronchial EGF and IGF-1 immunoreactivity from day 36 until the end of the experiment (Figures 4 and 5). OVA challenge produced a similar effect which was apparent earlier (from day 20) and more marked between days 20 and 36 in the case of EGF (Figures 4 and 5).Figure 4


IL-25 induces airways angiogenesis and expression of multiple angiogenic factors in a murine asthma model.

Yao X, Wang W, Li Y, Huang P, Zhang Q, Wang J, Wang W, Lv Z, An Y, Qin J, Corrigan CJ, Huang K, Sun Y, Ying S - Respir. Res. (2015)

IL-25 induced airways IGF-1 expression. A: Representative photomicrographs of insulin-like growth factor 1 (IGF-1) immunoreactivity in lung sections from saline (NS)-, OVA- and IL-25-challenged mice at various time points as indicated (original magnification x20). B: Quantitative analysis of IGF-1 immunoreactivity. The data were collected from 3 independent experiments and are expressed as the mean ± SEM (n = 5 in each group at each time point). *p < 0.05.
© Copyright Policy - open-access
Related In: Results  -  Collection

License 1 - License 2
Show All Figures
getmorefigures.php?uid=PMC4390095&req=5

Fig5: IL-25 induced airways IGF-1 expression. A: Representative photomicrographs of insulin-like growth factor 1 (IGF-1) immunoreactivity in lung sections from saline (NS)-, OVA- and IL-25-challenged mice at various time points as indicated (original magnification x20). B: Quantitative analysis of IGF-1 immunoreactivity. The data were collected from 3 independent experiments and are expressed as the mean ± SEM (n = 5 in each group at each time point). *p < 0.05.
Mentions: Immunoanalysis showed that IL-25, as compared with saline challenge of the airways significantly increased the expression of lung and peribronchial EGF and IGF-1 immunoreactivity from day 36 until the end of the experiment (Figures 4 and 5). OVA challenge produced a similar effect which was apparent earlier (from day 20) and more marked between days 20 and 36 in the case of EGF (Figures 4 and 5).Figure 4

Bottom Line: An in house assay was also utilised to compare the effects of IL-25 and other Th2-cytokines on angiogenesis by human vascular endothelial cells.Repetitive intranasal challenge with IL-25 alone or OVA alone in OVA-presensitised animals significantly increased peribronchial vWF (+) vessels in the murine airways, which was associated with remarkably elevated expression of amphiregulin, angiogenin, endothelin-1, bFGF, EGF, IGF-1, VEGF and ERG.The data suggest that chronic exposure of murine airways to IL-25 alone is able to reproduce a local angiogenic milieu.

View Article: PubMed Central - PubMed

Affiliation: Department of Respiratory Medicine, Beijing Tongren Hospital, Capital Medical University, Beijing, People's Republic of China. yaoxiujuanhello@163.com.

ABSTRACT

Background: Th2-promoting cytokine IL-25 might contribute to bronchial mucosal vascular remodelling in asthma through its receptor expressed by vascular endothelial and vascular smooth muscle cells.

Methods: By utilising a newly established chronic asthma murine model induced by direct exposure of the airways to IL-25 alone, we examined effects of IL-25 on angiogenesis, vascular remodelling and expression of angiogenic factors, compared changes with those in a "classical" ovalbumin (OVA)-induced murine asthma model. IL-25 and OVA were intranasally instilled into the airways of BALB/c mice for up to 55 days. Airways vessels and angiogenic factors, including Von Willebrand Factor (vWF), amphiregulin, angiogenin, endothelin-1, transcription factor ERG, basic fibroblast growth factor (bFGF), epidermal growth factor (EGF), insulin-like growth factor (IGF-1) and vascular endothelial growth factor (VEGF) in lung sections, homogenates and BAL fluid were detected and quantified by immunostaining or enzyme linked immunosorbent assay (ELISA). An in house assay was also utilised to compare the effects of IL-25 and other Th2-cytokines on angiogenesis by human vascular endothelial cells.

Results: Repetitive intranasal challenge with IL-25 alone or OVA alone in OVA-presensitised animals significantly increased peribronchial vWF (+) vessels in the murine airways, which was associated with remarkably elevated expression of amphiregulin, angiogenin, endothelin-1, bFGF, EGF, IGF-1, VEGF and ERG. IL-25, but not Th-2-cytokines induced human angiogenesis in vitro.

Conclusions: The data suggest that chronic exposure of murine airways to IL-25 alone is able to reproduce a local angiogenic milieu. Thus, blocking IL-25 may attenuate vascular remodelling and improve outcomes in asthma patients.

No MeSH data available.


Related in: MedlinePlus