Anchored p90 ribosomal S6 kinase 3 is required for cardiac myocyte hypertrophy.

Jinliang Li, Michael D. Kritzer, Jennifer J.Carlisle Michel, Andrew Le, Hrishikesh Thakur, Marjorie Gayanilo, Catherine L. Passariello, Alejandra Negro, Joshua B. Danial, Behzad Oskouei, Michael Sanders, Joshua Hare, Andre Hanauer, Kimberly Dodge-Kafka, Michael S Kapiloff

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

Cardiac myocyte hypertrophy is the main compensatory response to chronic stress on the heart. p90 ribosomal S6 kinase (RSK) family members are effectors for extracellular signal-regulated kinases that induce myocyte growth. Although increased RSK activity has been observed in stressed myocytes, the functions of individual RSK family members have remained poorly defined, despite being potential therapeutic targets for cardiac disease. To demonstrate that type 3 RSK (RSK3) is required for cardiac myocyte hypertrophy. RSK3 contains a unique N-terminal domain that is not conserved in other RSK family members. We show that this domain mediates the regulated binding of RSK3 to the muscle A-kinase anchoring protein scaffold, defining a novel kinase anchoring event. Disruption of both RSK3 expression using RNA interference and RSK3 anchoring using a competing muscle A-kinase anchoring protein peptide inhibited the hypertrophy of cultured myocytes. In vivo, RSK3 gene deletion in the mouse attenuated the concentric myocyte hypertrophy induced by pressure overload and catecholamine infusion. Taken together, these data demonstrate that anchored RSK3 transduces signals that modulate pathologic myocyte growth. Targeting of signaling complexes that contain select kinase isoforms should provide an approach for the specific inhibition of cardiac myocyte hypertrophy and for the development of novel strategies for the prevention and treatment of heart failure.

Original languageEnglish (US)
Pages (from-to)128-139
Number of pages12
JournalUnknown Journal
Volume112
Issue number1
DOIs
StatePublished - 2013
Externally publishedYes

Fingerprint

90-kDa Ribosomal Protein S6 Kinases
Ribosomal Protein S6 Kinases
muscle cells
Cardiomegaly
Cardiac Myocytes
Muscle Cells
Muscle
Phosphotransferases
Proteins
Scaffolds (biology)
RNA
Peptides
Genes
Protein Kinases
Hypertrophy
Extracellular Signal-Regulated MAP Kinases
muscles
Muscles
Scaffolds
Catecholamines

ASJC Scopus subject areas

  • Physiology
  • Cardiology and Cardiovascular Medicine

Cite this

Li, J., Kritzer, M. D., Michel, J. J. C., Le, A., Thakur, H., Gayanilo, M., ... Kapiloff, M. S. (2013). Anchored p90 ribosomal S6 kinase 3 is required for cardiac myocyte hypertrophy. Unknown Journal, 112(1), 128-139. https://doi.org/10.1161/CIRCRESAHA.112.276162

Anchored p90 ribosomal S6 kinase 3 is required for cardiac myocyte hypertrophy. / Li, Jinliang; Kritzer, Michael D.; Michel, Jennifer J.Carlisle; Le, Andrew; Thakur, Hrishikesh; Gayanilo, Marjorie; Passariello, Catherine L.; Negro, Alejandra; Danial, Joshua B.; Oskouei, Behzad; Sanders, Michael; Hare, Joshua; Hanauer, Andre; Dodge-Kafka, Kimberly; Kapiloff, Michael S.

In: Unknown Journal, Vol. 112, No. 1, 2013, p. 128-139.

Research output: Contribution to journalArticle

Li, J, Kritzer, MD, Michel, JJC, Le, A, Thakur, H, Gayanilo, M, Passariello, CL, Negro, A, Danial, JB, Oskouei, B, Sanders, M, Hare, J, Hanauer, A, Dodge-Kafka, K & Kapiloff, MS 2013, 'Anchored p90 ribosomal S6 kinase 3 is required for cardiac myocyte hypertrophy.', Unknown Journal, vol. 112, no. 1, pp. 128-139. https://doi.org/10.1161/CIRCRESAHA.112.276162
Li, Jinliang ; Kritzer, Michael D. ; Michel, Jennifer J.Carlisle ; Le, Andrew ; Thakur, Hrishikesh ; Gayanilo, Marjorie ; Passariello, Catherine L. ; Negro, Alejandra ; Danial, Joshua B. ; Oskouei, Behzad ; Sanders, Michael ; Hare, Joshua ; Hanauer, Andre ; Dodge-Kafka, Kimberly ; Kapiloff, Michael S. / Anchored p90 ribosomal S6 kinase 3 is required for cardiac myocyte hypertrophy. In: Unknown Journal. 2013 ; Vol. 112, No. 1. pp. 128-139.
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