Fetal Growth Plate Cartilage : Histological and Immunohistochemical Techniques.

Skeletal development is a tightly regulated process that primarily occurs through two distinct mechanisms. In intramembranous ossification, mesenchymal progenitors condense and transdifferentiate directly into osteoblasts, giving rise to the flat bones of the skull. The majority of the skeleton develops through endochondral ossification, in which mesenchymal progenitors give rise to a cartilaginous template that is gradually replaced by bone. The study of these processes necessitates a suitable animal model, a requirement to which the mouse is admirably suited. Their rapid reproductive ability, developmental and physiologic similarity to humans, and easily manipulated genetics all contribute to their widespread use. Outlined here are the most common histological and immunohistochemical techniques utilized in our laboratory for the isolation and analysis of specimens from the developing murine skeleton.