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首页> 外文期刊>Cytokine >Interleukin-2 enhances angiogenesis and preserves cardiac function following myocardial infarction.
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Interleukin-2 enhances angiogenesis and preserves cardiac function following myocardial infarction.

机译:白介素2增强心肌梗死后的血管生成并保留心脏功能。

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We previously demonstrated that injection of IL-2-activated natural killer (NK) cells contribute to vascular remodeling via a4b7 integrin and killer cell lectin-like receptor (KLRG) 1 and promote cardiac repair following myocardial infarction (MI). The aim of the present study is to test the hypothesis that injection of recombinant human interleukin (rhIL)-2 improves angiogenesis and preserves heart function after MI. A single IV injection of rhIL-2 two days following MI improved by 27.7% the left ventricular (LV) fractional shortening of immune competent (C57Bl6) mice, but had no effect on cardiac function of immune-deficient (NOD-SCID IL2Rgammanull) mice. Immunohistochemical analysis of C57Bl6 cross sections of heart revealed that collagen deposition was reduced by 23.1% and that capillary density was enhanced in the scar area and the border zone of the infarct respectively by 22.4% and 33.6% following rhIL-2 injection. In addition, rhIL-2 enhanced 1.6-fold the in vivo endothelial cell proliferation index and 1.8-fold the number of NK cell infiltrating the infarcted heart, but had no effect on the number of cardiac CD4 and CD8 cells. In vitro, rhIL-2 activated NK cells enhanced cardiac endothelial cell proliferation by 17.2%. Here we show that a single IV injection of rhIL-2 positively impacted cardiac function by improving angiogenesis through a process involving NK cells.
机译:我们先前证明,注射IL-2激活的自然杀伤(NK)细胞可通过a4b7整联蛋白和杀伤细胞凝集素样受体(KLRG)1促进血管重塑,并促进心肌梗死(MI)后的心脏修复。本研究的目的是检验以下假说:注射重组人白介素(rhIL)-2可改善心肌梗死后的血管生成并保留心脏功能。 MI后两天的一次静脉注射rhIL-2使免疫力(C57Bl6)小鼠的左心室(LV)分数缩短了27.7%,但对免疫缺陷(NOD-SCID IL2Rgammanull)小鼠的心脏功能没有影响。心脏C57B16横截面的免疫组织化学分析显示,注射rhIL-2后,胶原蛋白沉积减少了23.1%,并且在梗塞的疤痕区域和边界区域的毛细血管密度分别增加了22.4%和33.6%。另外,rhIL-2提高了体内内皮细胞增殖指数的1.6倍和浸润梗塞心脏的NK细胞数量的1.8倍,但对心脏CD4和CD8细胞的数量没有影响。在体外,rhIL-2激活的NK细胞使心脏内皮细胞增殖提高了17.2%。在这里,我们显示,通过涉及NK细胞的过程改善血管生成,一次静脉注射rhIL-2可以对心脏功能产生积极影响。

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