{Reference Type}: Journal Article {Title}: SMI-32 labeling in Cajal-Retzius cells of feline primary visual cortex. {Author}: Merkulyeva N;Mikhalkin A; {Journal}: Neurosci Lett {Volume}: 762 {Issue}: 0 {Year}: 09 2021 25 {Factor}: 3.197 {DOI}: 10.1016/j.neulet.2021.136165 {Abstract}: Cajal-Retzius cells are one of the transient elements of the developing cerebral cortex. These cells express some characteristic molecules. One of them, heavy-chain neurofilaments, participating in the construction of the mature cerebral networks, are believed to be a specific feature of the human's Cajal-Retzius cells. Using histochemical stain for SMI-32 antibody to the non-phosphorylated heavy-chain neurofilaments, large neurons having horizontally oriented soma and bipolar processes were labeled in the molecular layer of the primary visual cortex of cats aged 0-2 postnatal days. Using DiI technique, similar neurons having a well-developed system of parallel vertical branches coming from the two horizontal processes were visualized in these areas. The location and general morphology of these neurons were similar to the Cajal-Retzius cells allowing to suppose for the carnivores to share similar with primates developmental mechanisms of the corticogenesis.