Splicing factor-modulated generation of mechano gr... - MGF Igf-1-ec Study

Key Findings

Cyclic mechanical stretching raises MGF levels in osteoblasts

MGF enhances osteoblast proliferation and migration but inhibits their differentiation via the Erk1/2 pathway

The splicing factor ASF/SF2 is up‑regulated by stretch and drives the production of MGF

Practical Outcomes

Regular mechanical loading like resistance exercise may naturally increase MGF in bone, potentially supporting bone remodeling. However, the research is cell‑based and doesn’t provide dosing or direct supplementation advice, so biohackers should view it as mechanistic insight rather than a ready‑to‑use protocol.

Summary

The study shows that when bone cells are stretched, they make more of a protein called mechano‑growth factor (MGF), which helps the cells multiply and move but slows their maturation, and this is controlled by a splicing factor named ASF/SF2.

Abstract

Mechanical stimuli influence various physiological processes in osteoblasts. We previously showed that mechano-growth factor (MGF), a splicing variant of insulin-like growth factor 1, is highly expressed in osteoblasts in response to mechanical stimuli. This study aims to explore the systemic functions of MGF in osteoblasts, and the mechanisms by which mechanical stress regulates the alternative splicing of <i>Igf1</i> to generate MGF. We found that MGF promoted the proliferation and migration of osteoblasts, while it inhibited their differentiation via Erk1/2 pathway. Furthermore, cyclic stretching upregulated the expression of ASF/SF2, which in turn regulated the expression of MGF. Our findings indicate that mechanical stimuli influence the physiological responses of osteoblasts by increasing the expression of MGF, which is regulated by splicing factors.

Study Information

Provider

pubmed

Year

2019

Date

2019-01-01T00:00:00.000Z

DOI

10.1080/19336918.2019.1686103

Citations

References