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American Journal of Pathology, Vol 137, 605-615, Copyright © 1990 by American Society for Investigative Pathology

REGULAR ARTICLES

Histogenesis of the human adrenal medulla. An evaluation of the ontogeny of chromaffin and nonchromaffin lineages

MJ Cooper, GM Hutchins and MA Israel
Molecular Genetics Section, National Cancer Institute, National Institutes of Health, Bethesda, Maryland.

The authors previously evaluated the expression of a panel of chromaffin-related genes during histogenesis of the human adrenal medulla. In these studies, chromaffin and nonchromaffin adrenal neuroblasts were identified. To better characterize these nonchromaffin neuroblasts, the authors evaluated two additional markers: HNK-1, an antibody recognizing the migratory neural crest cell; and S-100, a protein expressed by sustentacular cells of the adrenal medulla. HNK-1 immunoreactivity was found in both chromaffin and nonchromaffin cell types at different times during development, marking the nonchromaffin lineage during the second trimester of gestation as well as the chromaffin lineage in the neonatal period. In addition, S-100 expression was noted in some nonchromaffin neuroblasts, and sustentacular cells were first identified at approximately 28 weeks of gestational age. These data suggest a model of human adrenal medullary histogenesis that incorporates the chromaffin, ganglionic, and sustentacular lineages known to constitute the adult adrenal medulla.


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Copyright © 1990 by the American Society for Investigative Pathology.