What question did this study set out to answer?

This research aims to understand how alpha- and beta-adrenergic agonists affect the mitogen-activated protein kinase (MAPK) pathway in cardiac myocytes.

February 15, 1996Biochemical JournalOpen Access

Adrenergic receptor stimulation of the mitogen-activated protein kinase cascade and cardiac hypertrophy

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Population

cardiac myocytes

Design

Preclinical

Authors

MBMarie A. BogoyevitchElectrophysiology MAMonica AnderssonKarolinska University Hospital JBJudith BrownUniversity of Glasgow

Discussion

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Implication

Animal data on distinct adrenergic MAPK pathways do not inform practice; hypothesis-generating for human cardiac signaling studies.

Key Points

This research aims to understand how alpha- and beta-adrenergic agonists affect the mitogen-activated protein kinase (MAPK) pathway in cardiac myocytes.
Utilized phenylephrine, noradrenaline, and isoprenaline to stimulate MAPK activation.
Measured EC50 values for MAPK activation by noradrenaline and isoprenaline.
Analyzed the effects of adrenergic antagonists and calcium ion manipulation on MAPK activity.
Isoprenaline activates MAPK with an EC50 of 0.2-0.3 µM, while noradrenaline shows 2-4 µM.
Propranolol inhibited isoprenaline-induced MAPK activation, and prazosin did the same for noradrenaline.
Elevated intracellular calcium is crucial for MAPK activation by isoprenaline, contrasting with noradrenaline's pathway.

Structured PICO

Population

cardiac myocytes

Intervention

phenylephrine, noradrenaline (alpha-adrenergic agonism) or isoprenaline (beta-adrenergic agonism)

Outcome

activation of mitogen-activated protein kinase (MAPK), protein synthesis rates, and activity of the atrial natriuretic factor gene promotersurrogate

Alpha- and beta-adrenergic agonists activate the MEK/MAPK pathway in cardiac myocytes via distinct signaling mechanisms, highlighting the role of intracellular calcium in beta-adrenergic signaling.

Cite This Study

Bogoyevitch et al. (1996) studied this question.

synapsesocial.com/papers/6a746202c2eb6969bf093812 https://doi.org/10.1042/bj3140115

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Adrenergic receptor stimulation of the mitogen-activated protein kinase cascade and cardiac hypertrophy

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Adrenergic receptor stimulation of the mitogen-activated protein kinase cascade and cardiac hypertrophy

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

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