What is the clinical evidence from this study?

Population: Cardiac hypertrophy. Intervention: Angiotensin II vs. Control. Primary outcome: RhoA activation and actin fiber organization.

What question did this study set out to answer?

The research aims to investigate if angiotensin II activates RhoA and mediates actin organization in cardiac myocytes.

April 6, 1998Circulation ResearchOpen Access

Angiotensin II Activates RhoA in Cardiac Myocytes

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Key result

Angiotensin II activates RhoA in cultured neonatal rat cardiac myocytes, mediating the formation of premyofibrils and induction of a subset of genes.

Key Points

The research aims to investigate if angiotensin II activates RhoA and mediates actin organization in cardiac myocytes.
Cardiac myocytes were treated with angiotensin II to assess actin fiber formation.
Immunoblot analyses and immunostaining were conducted to detect RhoA expression.
C3 exoenzyme was used to analyze Rho's role in actin organization.
Angiotensin II induced rapid formation of premyofibrils and mature myofibrils within 30 minutes.
C3 treatment completely inhibited premyofibril formation but only partially affected mature myofibrils.
RhoA activation by angiotensin II was confirmed, indicating it mediates specific gene expression.

Structured PICO

Population

Cultured neonatal rat cardiac myocytes

Intervention

Angiotensin II (Ang II) treatment, exoenzyme C3 treatment, and expression of constitutively active RhoA (V14RhoA)

Comparator

Control state

Outcome

Activation of RhoA and organization of actin fibers (formation of striated mature myofibrils and nonstriated premyofibrils)surrogate

Angiotensin II activates RhoA to mediate the formation of premyofibrils and induction of specific genes in cardiac myocytes, elucidating a signaling mechanism in cardiac hypertrophy.

Discussion

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Implication

No immediate clinical implications for hypertrophy; leaves open RhoA's role in adult human myocytes.

Cite This Study

Aoki et al. (1998) studied Cardiac hypertrophy. Angiotensin II vs. Control was evaluated on RhoA activation and actin fiber organization. Angiotensin II activates RhoA in cultured neonatal rat cardiac myocytes, mediating the formation of premyofibrils and induction of a subset of genes.

synapsesocial.com/papers/6a64022eb5b214049b7a88ed https://doi.org/10.1161/01.res.82.6.666

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Angiotensin II Activates RhoA in Cardiac Myocytes

Key Points

Structured PICO

Discussion

Implication

Cite This Study

Angiotensin II Activates RhoA in Cardiac Myocytes

Key Points

Structured PICO

Discussion

Implication

Cite This Study

Also Consider

Also Consider