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February 12, 2026Advances in Clinical and Experimental Medicine0 citationsOpen Access

Expression profile of circular RNA in angiotensin II-mediated abdominal aortic aneurysm in mice: A microarray analysis

JLJiangjie LouSWShaoze WuTLTing Lin

Key Result

Angiotensin II infusion induced abdominal aortic aneurysm in apoE -/- mice with 324 circRNAs differentially expressed compared to controls, including 90 upregulated and 234 downregulated circRNAs (p < 0.05).

Key Points

  • To analyze the expression profile of circular RNAs in abdominal aortic aneurysms induced by angiotensin II in a mouse model.
  • Utilized microarray analysis to assess circRNA expression levels in mouse abdominal aortic aneurysm tissues.
  • Compared circRNA expression profiles between aneurysm-induced and control groups.
  • Identified differential expressions of various circRNAs in the abdominal aortic aneurysm tissues.
  • Suggested involvement of the circRNA-miRNA-mRNA axis as a regulatory mechanism in abdominal aortic aneurysm.

Structured PICO

Does angiotensin II infusion alter the expression profile of circular RNAs in the abdominal aorta of apoE-/- mice?

P
Population
30 male apoE-/- mice (12 weeks old, C57BL/6 background)
I
Intervention
Angiotensin II (1,000 ng/kg/min) via subcutaneous osmotic minipump for 28 consecutive days
C
Comparator
Normal saline via subcutaneous osmotic minipump for 28 consecutive days
O
Outcome
Differential expression of circRNAs in aortic tissuessurrogate

Significant differential expression of circRNAs in Ang II-induced AAA mice suggests that the circRNA-miRNA-mRNA axis may serve as a potential molecular regulatory mechanism for abdominal aortic aneurysms.

Main Result

Effect estimate: 90 circRNAs upregulated and 234 circRNAs downregulated (fold change ≥1.5, p < 0.05)

Absolute Event Rate: 324% vs 0%

p-value: p=<0.05

Limitations

  • The study was performed in a mouse model and results may not translate directly to humans.
  • The circRNA-miRNA-mRNA interaction network was predicted solely by bioinformatics and requires experimental validation.
  • Functional roles of validated circRNAs were not confirmed by knockdown or overexpression studies.
  • Potential interactions of circRNAs with RNA-binding proteins or their translation into peptides were not explored.

Abstract

The differential expression of various circRNAs identified in AAA suggests that the circRNA-miRNA-mRNA axis may serve as a potential molecular regulatory mechanism for AAA.

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Cite This Study

Lou et al. (2026) studied Male apolipoprotein E-deficient (apoE -/-) mice aged 12 weeks with angiotensin II-induced abdominal aortic aneurysm (n=30). Angiotensin II infusion vs. saline infusion was evaluated on Differential expression of circular RNAs in abdominal aortic tissue (90 circRNAs upregulated and 234 circRNAs downregulated (fold change ≥1.5, p < 0.05), p=<0.05). Angiotensin II infusion induced abdominal aortic aneurysm in apoE -/- mice with 324 circRNAs differentially expressed compared to controls, including 90 upregulated and 234 downregulated circRNAs (p < 0.05).

synapsesocial.com/papers/698d6d445be6419ac0d52345https://doi.org/10.17219/acem/203098
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