Interactions of IGF-1 with the blood-brain barrier in vivo and in situ.
Pan W & Kastin A J · Neuroendocrinology · 2000
Researchers studied how insulin-like growth factor-1 (IGF-1) crosses the blood-brain barrier (BBB) and its behavior in the brain and spinal cord. They found that IGF-1 can enter the brain quickly and remains intact for a short period, suggesting a specific transport system at the BBB that regulates its availability to the central nervous system.
Key findings
- 01Researchers observed that IGF-1 has a half-life of 4.5 minutes in blood and can enter the brain and spinal cord effectively after intravenous injection.
- 02The influx rate of IGF-1 into the brain was measured at 0.4 microl/g x min, indicating a significant transport mechanism.
- 03The study found that the presence of nonradiolabeled IGF-1 enhances the influx of IGF-1 into the brain when injected, but not during direct brain perfusion.