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Development, Vol 102, Issue 1 101-106, Copyright © 1988 by Company of Biologists

JOURNAL ARTICLES

Detection of nerve growth factor mRNA in the developing chicken embryo

T Ebendal and H Persson
Department of Zoology, Uppsala University, Sweden.

Nerve growth factor (beta NGF) is a protein supporting sympathetic and sensory innervation in the peripheral tissues as well as cholinergic innervation in the brain. A DNA probe derived from a genomic clone coding for chicken NGF was used to study NGF mRNA levels during development. NGF mRNA was detected in the chicken embryo as early as day 3.5 of incubation. The level of NGF mRNA in total embryo increased four-fold until day 8, remained high until day 12, and subsequently decreased. No corresponding peak in NGF mRNA expression was found in heart and brain measured separately. Instead these organs showed increased NGF mRNA levels after hatching. The highest levels of NGF mRNA in the day-8 embryo were found in skin and eye (in particular cornea, but also iris, sclera-choroid and neural retina) suggesting a correlation between sensory innervation and this early peak of NGF expression.


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© The Company of Biologists Ltd 1988