Open AccessLocalization of E2A mRNA expression in developing and adult rat tissues.
Author(s) -
Veronica J. Roberts,
Renske D.M. Steenbergen,
Cornelis Murre
Publication year - 1993
Publication title -
proceedings of the national academy of sciences of the united states of america
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.011
H-Index - 771
eISSN - 1091-6490
pISSN - 0027-8424
DOI - 10.1073/pnas.90.16.7583
Subject(s) - biology , in situ hybridization , ependyma , germinal center , microbiology and biotechnology , neural tube , embryonic stem cell , morphogenesis , pancreas , choroid plexus , notochord , messenger rna , embryo , embryogenesis , central nervous system , endocrinology , immunology , b cell , gene , genetics , antibody
E2A helix-loop-helix proteins are involved in the control of various developmental pathways. We show here by in situ hybridization that E2A transcripts are present in most embryonic and adult tissues. However, no E2A expression is detectable in heart and nonproliferative regions of the brain and spinal cord. Highest levels of E2A expression are found in the ependyma cell layer surrounding the cerebral ventricles in the embryonic rat brain. In addition, in the embryo, E2A transcripts were found in secretory cells of the pancreas, the bronchial tubes of the lung, glomeruli of the kidney, and the lining of the stomach. Interestingly, high levels of E2A transcripts are selectively found in the germinal center of the lymphatic nodules in the adult rat spleen. Thus, E2A, like its Drosophila homolog daughterless, is expressed in most tissues. The most notable feature of the E2A expression pattern is its high levels of expression in some areas of rapid cell proliferation and differentiation and in certain epithelial cell types.