What question did this study set out to answer?

This research aims to elucidate the autocrine role of endothelin in vascular smooth muscle cells and its implications for vascular function.

August 1, 1990Cell RegulationOpen Access

Stimulation of endothelin mRNA and secretion in rat vascular smooth muscle cells: a novel autocrine function.

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Population

Immunocytochemically characterized smooth muscle cells isolated from the aortas of spontaneously…

Comparison

Stimulation with growth factors and vasoactive… vs Quiescent cultures of rVSMC

Design

Preclinical

Authors

AHA W HahnUniversity Hospital of Basel TRThérèse J. ResinkUniversity of Cape Town TSTimothy Scott‐BurdenTexas Medical Center

Discussion

Member takes

Implication

May indicate autocrine ET-1 in vascular smooth muscle; leaves open its role in human atherosclerosis.

Key Points

This research aims to elucidate the autocrine role of endothelin in vascular smooth muscle cells and its implications for vascular function.
Isolated rat vascular smooth muscle cells (rVSMC) from spontaneously hypertensive rats were utilized.
Growth factors and vasoactive hormones were applied to investigate the induction of prepro ET-1mRNA and peptide secretion.
The expression of ET-1 mRNA and peptide was measured through immunocytochemistry, radioreceptor, and radioimmunoassay techniques.
Induction of prepro ET-1mRNA was rapid and transient, with ET-1 levels accumulating to approximately 200 pg.10(6) cells-1 x 4 h-1.
Down-regulation of protein kinase C reduced the expression of ET-1 transcripts and secretion in response to Ang II.
ET-1 influenced the gene expression of PDGF-A chain, TGF-beta, and thrombospondin, indicating its mitogenic potential on smooth muscle cells.

Structured PICO

Population

Immunocytochemically characterized smooth muscle cells (rVSMC) isolated from the aortas of spontaneously hypertensive rats

Intervention

Stimulation with growth factors (TGF-beta, PDGF-A chain) and vasoactive hormones (Ang II, arginine-vasopressin, ET-1)

Comparator

Quiescent cultures of rVSMC

Outcome

Expression of prepro ET-1mRNA and secretion of ET-1 peptidesurrogate

The study demonstrates that vascular smooth muscle cells can synthesize and secrete endothelin-1 in response to growth factors and vasoactive hormones, indicating a novel autocrine loop that may play a role in vasospasm and atherosclerosis.

Cite This Study

Hahn et al. (1990) studied this question.

synapsesocial.com/papers/6a2084c347fdc8d429f4254b https://doi.org/10.1091/mbc.1.9.649

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Stimulation of endothelin mRNA and secretion in rat vascular smooth muscle cells: a novel autocrine function.

Discussion

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Implication

Key Points

Structured PICO

Cite This Study

Stimulation of endothelin mRNA and secretion in rat vascular smooth muscle cells: a novel autocrine function.

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

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