What is the clinical evidence from this study?

Study design: Other. Population: Hypertension. Intervention: Losartan vs. Untreated SHR / WKY. Primary outcome: Number of PRV-labeled neurons in the PVN and RVLM and hypertension development.

What does this research mean for the field?

Long-term losartan treatment in young, prehypertensive spontaneously hypertensive rats blunts age-dependent hypertension development and reverses the increase in presympathetic neuronal labeling, demonstrating that enhanced AT1 receptor activity drives the expansion of presympathetic circuitry. Novelty: ClaimNovelty.NOVEL_FINDING. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To determine whether presympathetic neural circuitry projecting to the adrenal gland undergoes remodeling during the progression of hypertension, and to examine the role of angiotensin AT1 receptors in this process.

September 14, 2026Neurobiology of DiseaseOpen Access

Long-term losartan blunts age-dependent hypertension in prehypertensive rats and reverses increased presympathetic neuronal labeling.

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Why the study?

Although presympathetic neural circuitry in the healthy brain is well characterized, whether these pathways undergo remodeling during hypertension remains unclear.

Population

Male spontaneously hypertensive rats and normotensive Wistar-Kyoto rats

Comparison

Losartan treatment vs no losartan in SHR and WKY rats

Design

Preclinical animal study with transsynaptic retrograde viral tracing and electrophysiological recordings

Key result

Long-term losartan treatment in young, prehypertensive spontaneously hypertensive rats blunted age-dependent hypertension development and reversed the increase in presympathetic neuronal labeling.

Authors

JZJing-Jing Zhou JSJian-Ying Shao SCShao-Rui Chen

Discussion

Member takes

Overview

Early AT1 blockade may limit sympathetic remodeling in hypertension models; human translation remains untested.

Key Points

To determine whether presympathetic neural circuitry projecting to the adrenal gland undergoes remodeling during the progression of hypertension, and to examine the role of angiotensin AT1 receptors in this process.
Mapped adrenal-projecting presympathetic circuits using retrograde transsynaptic tracing with pseudorabies virus (PRV) injected into the adrenal glands of male spontaneously hypertensive rats (SHR) and normotensive Wistar-Kyoto rats (WKY).
Assessed neuronal labeling and electrophysiological properties in young prehypertensive and adult rats following long-term treatment with the AT1 receptor antagonist losartan.
Adult SHR exhibited a significantly higher number of PRV-labeled presympathetic neurons in the hypothalamic paraventricular nucleus (PVN) and rostral ventrolateral medulla (RVLM) compared to WKY, whereas labeling was equivalent in young prehypertensive rats.
Early chronic losartan treatment prevented the age-dependent increase in blood pressure, reversed the anatomical expansion of PVN and RVLM circuitry in SHR, and had no effect in normotensive controls.
Losartan administration normalized the elevated frequency of miniature excitatory postsynaptic currents observed in PVN presympathetic neurons of SHR.

Structured PICO

Population

Male spontaneously hypertensive rats and normotensive Wistar-Kyoto rats evaluated for presympathetic neural circuit remodeling during hypertension development.

Intervention

Long-term treatment with losartan (a brain-penetrant angiotensin II AT1 receptor antagonist)

Comparator

Untreated SHR and WKY rats (with and without losartan)

Outcome

Number of PRV-labeled neurons in the hypothalamic paraventricular nucleus (PVN) and the rostral ventrolateral medulla (RVLM)surrogate

Long-term AT1 receptor antagonism with losartan prevents the age-dependent expansion of presympathetic neuronal connectivity associated with hypertension development in a rat model.

Cite This Study

Zhou et al. (2026) studied Hypertension. Losartan vs. Untreated SHR / WKY was evaluated on Number of PRV-labeled neurons in the PVN and RVLM and hypertension development. Long-term losartan treatment in young, prehypertensive spontaneously hypertensive rats blunted age-dependent hypertension development and reversed the increase in presympathetic neuronal labeling.

synapsesocial.com/papers/6aa7b2530926e14a848b0b22 https://doi.org/10.1016/j.nbd.2026.107607

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September 14, 2026Neurobiology of DiseaseOpen Access

Long-term losartan blunts age-dependent hypertension in prehypertensive rats and reverses increased presympathetic neuronal labeling.

View Full Paper

Ask AI

Bookmark

Why the study?

Although presympathetic neural circuitry in the healthy brain is well characterized, whether these pathways undergo remodeling during hypertension remains unclear.

Population

Male spontaneously hypertensive rats and normotensive Wistar-Kyoto rats

Comparison

Losartan treatment vs no losartan in SHR and WKY rats

Design

Preclinical animal study with transsynaptic retrograde viral tracing and electrophysiological recordings

Key result

Long-term losartan treatment in young, prehypertensive spontaneously hypertensive rats blunted age-dependent hypertension development and reversed the increase in presympathetic neuronal labeling.

Authors

JZJing-Jing Zhou JSJian-Ying Shao SCShao-Rui Chen

Discussion

Member takes

Overview

Early AT1 blockade may limit sympathetic remodeling in hypertension models; human translation remains untested.

Key Points

To determine whether presympathetic neural circuitry projecting to the adrenal gland undergoes remodeling during the progression of hypertension, and to examine the role of angiotensin AT1 receptors in this process.
Mapped adrenal-projecting presympathetic circuits using retrograde transsynaptic tracing with pseudorabies virus (PRV) injected into the adrenal glands of male spontaneously hypertensive rats (SHR) and normotensive Wistar-Kyoto rats (WKY).
Assessed neuronal labeling and electrophysiological properties in young prehypertensive and adult rats following long-term treatment with the AT1 receptor antagonist losartan.
Adult SHR exhibited a significantly higher number of PRV-labeled presympathetic neurons in the hypothalamic paraventricular nucleus (PVN) and rostral ventrolateral medulla (RVLM) compared to WKY, whereas labeling was equivalent in young prehypertensive rats.
Early chronic losartan treatment prevented the age-dependent increase in blood pressure, reversed the anatomical expansion of PVN and RVLM circuitry in SHR, and had no effect in normotensive controls.
Losartan administration normalized the elevated frequency of miniature excitatory postsynaptic currents observed in PVN presympathetic neurons of SHR.

Structured PICO

Population

Male spontaneously hypertensive rats and normotensive Wistar-Kyoto rats evaluated for presympathetic neural circuit remodeling during hypertension development.

Intervention

Long-term treatment with losartan (a brain-penetrant angiotensin II AT1 receptor antagonist)

Comparator

Untreated SHR and WKY rats (with and without losartan)

Outcome

Number of PRV-labeled neurons in the hypothalamic paraventricular nucleus (PVN) and the rostral ventrolateral medulla (RVLM)surrogate

Long-term AT1 receptor antagonism with losartan prevents the age-dependent expansion of presympathetic neuronal connectivity associated with hypertension development in a rat model.

Cite This Study

synapsesocial.com/papers/6aa7b2530926e14a848b0b22 https://doi.org/10.1016/j.nbd.2026.107607

View Full Paper

Ask AI

Bookmark