Torimoto Keiichi, Vari Hymavathi Reddy, Nakayama Yuki, Utsunomiya Hirotoshi, Takeda Masatoshi, Hashimoto Tomoki, Rizzo Victor, Eguchi Satoru
Department of Cardiovascular Science, Lewis Katz School of Medicine at Temple University, Philadelphia, PA.
Department of Rehabilitation, Osaka Kawasaki Rehabilitation University, Osaka, Japan.
JVS Vasc Sci. 2024 Dec 2;6:100270. doi: 10.1016/j.jvssci.2024.100270. eCollection 2025.
Treatment with an inhibitor of glucose use via glucose transporters (GLUT) has been shown to attenuate experimental abdominal aortic aneurysm (AAA) development in mice. Vascular smooth muscle cell (VSMC) signaling seems to be essential for angiotensin II (Ang II)-induced AAA in mice. Accordingly, we have tested a hypothesis that VSMC silencing of the major GLUT, GLUT1, prevents AAA development and rupture in mice treated with Ang II plus β-aminopropionitrile. A mouse model of inducible VSMC GLUT1 deletion was created and aortic GLUT1 silencing was confirmed. Without Ang II plus β-aminopropionitrile treatment, no difference was observed regarding the external aortic diameter (control 1.06 ± 0.18 mm vs deletion 0.97 ± 0.26 mm) or systolic blood pressure (control 102 ± 9 mm Hg vs deletion 107 ± 11 mm Hg) between control or GLUT1-silenced mice. With treatment, control mice as well as VSMC GLUT1-silenced mice equally developed AAA (control 2.37 ± 0.75 mm vs deletion 2.41 ± 0.93 mm), whereas a tendency toward lower blood pressure was observed in GLUT1 silenced mice (control 150 ± 9 mm Hg vs deletion 135 ± 22 mm Hg). No significant difference was observed regarding the rate of rupture-dependent mortality. We concluded that VSMC GLUT1 is dispensable for AAA development induced by Ang II in mice.
通过葡萄糖转运蛋白(GLUT)抑制葡萄糖利用的治疗已被证明可减轻小鼠实验性腹主动脉瘤(AAA)的发展。血管平滑肌细胞(VSMC)信号传导似乎对小鼠中血管紧张素II(Ang II)诱导的AAA至关重要。因此,我们测试了一个假设,即主要GLUT即GLUT1在VSMC中的沉默可预防在用Ang II加β-氨基丙腈治疗的小鼠中AAA的发展和破裂。创建了可诱导的VSMC GLUT1缺失的小鼠模型,并证实了主动脉GLUT1的沉默。在未用Ang II加β-氨基丙腈治疗的情况下,对照小鼠或GLUT1沉默小鼠之间在主动脉外径(对照1.06±0.18毫米对缺失0.97±0.26毫米)或收缩压(对照102±9毫米汞柱对缺失107±11毫米汞柱)方面未观察到差异。经过治疗,对照小鼠以及VSMC GLUT1沉默小鼠均同样发生了AAA(对照2.37±\u003cspan lang="EN-US">0.75毫米对缺失2.41±0.93毫米),而在GLUT1沉默小鼠中观察到血压有降低的趋势(对照150±9毫米汞柱对缺失135±22毫米汞柱)。在依赖破裂的死亡率方面未观察到显著差异。我们得出结论,VSMC GLUT1对于小鼠中由Ang II诱导的AAA发展是可有可无的。