Other studies using intramuscular injection of ferritin (~112 nm), irondextran (11 or 21 nm), and gold protein (20-25 nm) NSPs also showed rapid penetration through the basal lamina into the synaptic clef of the neuromuscular junction, but this was restricted to only the smaller nanoparticles, implying that there may be a size-dependent penetration of the basal lamina with a threshold somewhere between 10 and 20 nm (Oldfors and Fardeau 1983).

A basal lamina surrounds the endothelial cell and splits to enclose each pericyte.

After three to four weeks, a complete basal lamina -- a layer of specially arranged cells -- is formed between the epidermis and dermis.