What is the clinical evidence from this study?

Study design: Other. Population: Myocardial infarction. Intervention: Arterial baroreflex deficiency vs. Normal baroreflex function. Primary outcome: Angiogenesis (capillary density, regional blood flow, VEGF concentration) and survival time.

What does this research mean for the field?

Arterial baroreflex deficiency impairs post-myocardial infarction angiogenesis and shortens survival via downregulation of acetylcholine and the alpha-7 nicotinic acetylcholine receptor pathway. Novelty: ClaimNovelty.NOVEL_FINDING. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To examine whether arterial baroreflex deficiency impairs angiogenesis in the ischaemic myocardium after myocardial infarction and to determine the underlying acetylcholine receptor mechanisms.

August 18, 2026European Heart JournalOpen Access

Baroreflex deficiency hampers angiogenesis after myocardial infarction via acetylcholine- 7-nicotinic ACh receptor in rats

Q: What are the key findings of this study?

Arterial baroreflex deficiency (BRS <0.60 ms/mmHg) significantly shortened survival time and attenuated angiogenesis in ischemic myocardium after myocardial infarction in rats.

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Key result

Arterial baroreflex deficiency shortens survival and impairs angiogenesis post-MI in rats.

Why the study?

Human studies have associated arterial baroreflex deficiency with higher rates of sudden death after MI, but whether arterial baroreflex deficiency affects angiogenesis in MI was unknown.

Does arterial baroreflex deficiency attenuate angiogenesis after myocardial infarction via the acetylcholine-α7-nicotinic ACh receptor pathway in animal models?

Population

Rats with MI, α7-nAChR knockout mice, and cultured cardiac microvascular endothelial cells

Comparison

Arterial baroreflex deficiency or modulation vs controls

Design

Preclinical animal and cellular experimental study

Follow-up

1 month

Authors

JYJian‐Guang YuShanghai Jiao Tong University SSShangqing SongShanghai Ninth People's Hospital HSHao ShuUniversity of Science and Technology of China

Discussion

Member takes

Implication

ABR deficiency may impair post-MI angiogenesis in rats; leaves open any human relevance or therapeutic target.

Key Points

To examine whether arterial baroreflex deficiency impairs angiogenesis in the ischaemic myocardium after myocardial infarction and to determine the underlying acetylcholine receptor mechanisms.
Measured baroreflex sensitivity (BRS) in conscious Sprague-Dawley rats one month after left anterior descending coronary artery occlusion, evaluating the impact of sinoaortic denervation and ketanserin (0.6 mg/kg/day).
Assessed post-infarction angiogenesis in alpha-7 nicotinic acetylcholine receptor (α7-nAChR) knockout mice and in rats treated with the cholinesterase inhibitor pyridostigmine (30 mg/kg/day).
Evaluated VEGF expression, VEGF receptor 2 phosphorylation, and endothelial tube formation in cultured cardiac microvascular endothelial cells exposed to acetylcholine.
Rats with BRS <0.60 ms/mmHg exhibited significantly shorter survival post-infarction compared to those with BRS ≥0.60 ms/mmHg.
Sinoaortic denervation significantly reduced capillary density, regional blood flow, VEGF concentration, vesicular acetylcholine transporter, and α7-nAChR expression, whereas ketanserin or pyridostigmine reversed these angiogenic impairments.
Angiogenesis was attenuated in α7-nAChR knockout mice, and acetylcholine stimulated VEGF expression, VEGFR-2 phosphorylation, and endothelial tube formation in an α7-nAChR-dependent manner.

Structured PICO

Does arterial baroreflex deficiency attenuate angiogenesis after myocardial infarction via the acetylcholine-α7-nicotinic ACh receptor pathway in animal models?

Population

Sprague-Dawley rats, α7-nAChR knockout mice, and cultured cardiac microvascular endothelial cells used to study angiogenesis after myocardial infarction.

Exposure

Sinoaortic denervation, ketanserin (0.6 mg/kg/day), or pyridostigmine (30 mg/kg/day)

Comparator

Animals with intact arterial baroreflex or untreated controls

Outcome

Angiogenesis (capillary density, regional blood flow, VEGF concentration) and survival timesurrogate

Arterial baroreflex deficiency impairs angiogenesis after myocardial infarction via the acetylcholine-α7-nicotinic ACh receptor pathway, highlighting a potential therapeutic target.

Cite This Study

Yu et al. (2011) studied Myocardial infarction. Arterial baroreflex deficiency vs. Normal baroreflex function was evaluated on Angiogenesis (capillary density, regional blood flow, VEGF concentration) and survival time. Arterial baroreflex deficiency (BRS <0.60 ms/mmHg) significantly shortened survival time and attenuated angiogenesis in ischemic myocardium after myocardial infarction in rats.

synapsesocial.com/papers/6a84cc49ee0fea72647692eb https://doi.org/10.1093/eurheartj/ehr299

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Baroreflex deficiency hampers angiogenesis after myocardial infarction via acetylcholine- 7-nicotinic ACh receptor in rats

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Baroreflex deficiency hampers angiogenesis after myocardial infarction via acetylcholine- 7-nicotinic ACh receptor in rats

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

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