The area-code hypothesis: the immune system provides clues to understanding the genetic and molecular basis of cell recognition during development

Journal of Supramolecular Structure
L HoodW J Dreyer

Abstract

Numberous studies of embryogenesis have provided evidence for highly specific cell-surface recognition phenomena. These include both the interactions of neighboring cells and the specific cellular migrations which occur as the developmental program of the embryo progresses. The area-code hypothesis elaborate here is an attempt to provide a framework for understanding cell-recognition phenomena in development. This hypothesis is based on extensive genetic, molecular, and cellular studies of the immune system. These studies suggest that the following events occur during the differentiation of antibody-producing cells. 1) Somatic cell lines of antibody-producing cells undergo a modification of their DNA as they become committed to synthesize a particular type of antibody molecule. This chromosomal modification event is probably a DNA translocation which leads to a somatic rearrangement of certain antibody genes. 2) In each of the specific cell lineages the new arrangement of DNA is inherited by all subsequent generations of cells. 3) The developmental programs which control these genetic alterations may be employed in a programmed and reproducible fashion. This programming of antibody development is suggested because different emb...Continue Reading

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