首页> 美国卫生研究院文献>The Journal of Experimental Medicine >Defective Angiogenesis in the Inflammatory Granulation Tissue in Histidine Decarboxylase–deficient Mice but not in Mast Cell–deficient Mice
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Defective Angiogenesis in the Inflammatory Granulation Tissue in Histidine Decarboxylase–deficient Mice but not in Mast Cell–deficient Mice

机译:组氨酸脱羧酶缺陷小鼠的炎症性肉芽组织中有缺陷的血管生成而肥大细胞缺陷小鼠则没有。

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摘要

We have analyzed the role of histamine in the angiogenesis of the granulation tissue in histidine decarboxylase–deficient (HDC−/−) mice, mast cell–deficient mice (WBB6F1-W/W V), and their corresponding wild-type mice (HDC+/+ and WBB6F1 +/+). In HDC+/+ mice, subcutaneous implantation of a cotton thread in the dorsum induced granulation tissue formation with angiogenesis, while the topical injection of antivascular endothelial growth factor (VEGF) IgG strongly suppressed them. In HDC−/− mice which showed lower VEGF levels in the granulation tissue, there was notably less angiogenesis and granulation tissue formation than in HDC+/+ mice. The topical injection of histamine or the H2 agonist dimaprit rescued the defective angiogenesis and granulation tissue formation in HDC−/− mice. There was no significant difference in the granulation tissue formation and angiogenesis between WBB6F1-W/W V and WBB6F1+/+ mice. In addition, macrophages in the granulation tissue were found to express HDC. Our findings indicate that histamine derived from nonmast cells plays a significant role in the angiogenesis of the inflammatory granulation tissue.
机译:我们已经分析了组胺在组氨酸脱羧酶缺陷型(HDC -/-)小鼠,肥大细胞缺陷型小鼠(WBB6F1-W / W V < / sup>)及其相应的野生型小鼠(HDC + / + 和WBB6F1 + / + )。在HDC + / + 小鼠中,在背侧皮下植入棉线可导致肉芽组织形成并伴有血管生成,而局部注射抗血管内皮生长因子(VEGF)IgG则可强烈抑制它们。在HDC -/-小鼠中,其肉芽组织中的VEGF水平较低,与HDC + / + 小鼠相比,其血管生成和肉芽组织的形成明显减少。局部注射组胺或H2激动剂双马来酸可以挽救HDC -// 小鼠的血管生成缺陷和肉芽组织形成。 WBB6F1-W / W V 和WBB6F1 + / + 小鼠的肉芽组织形成和血管生成无明显差异。另外,发现肉芽组织中的巨噬细胞表达HDC。我们的发现表明,源自非肥大细胞的组胺在炎性肉芽组织的血管生成中起重要作用。

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