Enhanced green fluorescence protein (EGFP) expression in the meningeal pia mater cells.

<p>EGFP expression was located in the meningeal pia mater cells in the Ad-EGFP group after intrathecal injection (see red arrow in the panel A), suggesting that adenovirus was transfected into the same location. This was not observed in the normal saline group as indicated in panel B.</p>