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May 16, 2014Journal of Bone and Mineral ResearchOpen Access

IGFBP-2 overexpression doubled osteocalcin expression by day 6 compared to controls, and addition of IGFBP-2 or its HBD-1 peptide rescued differentiation in IGFBP-2(-/-) osteoblasts via RPTPβ interaction and AKT activation.

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Population

MC-3T3 preosteoblasts and primary calvarial osteoblasts from IGFBP-2(-/-) mice

Comparison

IGFBP-2 modulation vs Control cultures

Design

Preclinical

Authors

GXGang XiCWChristine WaiVDVictoria DeMambro

Discussion

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Overview

IGFBP-2 pathway merits exploration for osteoporosis therapy; leaves open clinical translation from preclinical models.

Structured PICO

P
Population
MC-3T3 preosteoblasts and primary calvarial osteoblasts from IGFBP-2(-/-) mice
I
Intervention
IGFBP-2 modulation (knockdown, overexpression, or exogenous addition of wild-type, mutant, or synthetic HBD-1 peptide)
C
Comparator
Control cultures
O
Outcome
Osteoblast differentiation (measured by osteocalcin expression and Alizarin red staining)surrogate

IGFBP-2 directly stimulates osteoblast differentiation via interaction between its heparin-binding domain-1 and RPTPβ, highlighting a key mechanism for bone mass regulation.

Cite This Study

Xi et al. (2014) studied this question.

synapsesocial.com/papers/6a852f8122ea7ab258b2ea4dhttps://doi.org/10.1002/jbmr.2282
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Evidence that IGF-binding protein-5 functions as a growth factor2001 · 216 citations
  2. 2Insulin like growth factor – insulin like growth factor binding protein family in osteoporosis: mechanistic and clinical insights2026
  3. 3Paradoxical Actions of Endogenous and Exogenous Insulin-like Growth Factor-binding Protein-5 Revealed by RNA Interference Analysis2004 · 65 citations
  4. 4IGFBP-2 expression in a human cell line is associated with increased IGFBP-3 proteolysis, decreased IGFBP-1 expression and increased tumorigenicity1998 · 51 citations
  5. 5Selective Alterations in Organ Sizes in Mice with a Targeted Disruption of the Insulin-Like Growth Factor Binding Protein-2 Gene2000 · 119 citations