What question did this study set out to answer?

To evaluate the IGF-independent roles of IGFBP-3 in cell proliferation and metabolism, and to examine the regulatory mechanisms controlling its systemic and local availability.

March 12, 2009AJP Cell Physiology

Perspectives in mammalian IGFBP-3 biology: local vs. systemic action

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Authors

PYPaulette M. YamadaUniversity of Hawaiʻi at Mānoa KLKuk‐Wha LeeEwha Womans University

Discussion

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Implication

Review uncovers IGF-independent actions of IGFBP-3 on metabolism and tumor proliferation in mammalian models, highlighting its dual function as an endocrine and autocrine effector molecule.

Key Points

To evaluate the IGF-independent roles of IGFBP-3 in cell proliferation and metabolism, and to examine the regulatory mechanisms controlling its systemic and local availability.
Synthesized findings from studies utilizing non-IGF-binding IGFBP-3 analogs, cell lines devoid of type 1 IGF receptors, and in vivo tumor models.
Reviewed cellular and molecular mechanisms regulating IGFBP-3 levels, focusing on synthesis, gene methylation, and ubiquitination pathways.
IGFBP-3 suppresses cancer cell proliferation independently of IGF and cooperates with retinoid X receptor-alpha to decrease prostate tumor growth and prostate-specific antigen in vivo.
IGFBP-3 directly impairs insulin-stimulated glucose uptake in adipocytes via an IGF-independent mechanism.
IGFBP-3 tissue availability and bioactivity are regulated across systemic and local environments via promoter methylation and post-translational ubiquitination.

Cite This Study

Yamada et al. (2009) studied this question.

synapsesocial.com/papers/6a1f844e52dcfdcb78cf30c0 https://doi.org/10.1152/ajpcell.00598.2008

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Implication

Review uncovers IGF-independent actions of IGFBP-3 on metabolism and tumor proliferation in mammalian models, highlighting its dual function as an endocrine and autocrine effector molecule.

Perspectives in mammalian IGFBP-3 biology: local vs. systemic action

Discussion

Member takes

Implication

Key Points

Cite This Study

Perspectives in mammalian IGFBP-3 biology: local vs. systemic action

Discussion

Member takes

Implication

Key Points

Cite This Study

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