In situ hybridization of calbindin-D 28 k transcripts in undecalcified sections of the rat continuously erupting incisor.

Abstract:

:Calbindin-D9k and calbindin-D-28k genes are useful systems to investigate the tissue- and stage-specificity as well as the hormonal control of gene expression. Since they regulate cellular calcium mobilization, their study may be of interest in mineralized tissues. However, thus far, immunocytochemical labelling has been mainly realized in these systems. In order to set up methods for mRNA investigation, in situ hybridization of calbindin-D28k mRNAs was performed in the continuously erupting incisor of Sprague-Dawley rats (15-, 30-, and 56-day-old). 35S UTP labelled antisense and sense riboprobes specific for brain calbindin-D 28k were used for in situ hybridization. Specific and non-specific signals could not be discerned when studying decalcified samples. In contrast, on sections not pretreated with EDTA, calbindin-D 28k transcripts (in tooth and kidney) appeared strongly labelled with antisense probes, while sense probes provided a negligible background. In ameloblasts, the signal (i.e., calbindin-D 28k mRNA levels) increased during the presecretory stage. Different mRNA gradients and subcellular distribution patterns characterized the secretory and maturation stages. A nuclear labelling was observed, associated with the highest levels of transcripts. These data suggest a developmental control of calbindin-D28k mRNA transcription. Calbindin-D28k gene expression appears to be up-regulated during the initiation of both secretory and maturation stages of enamel mineralization.

journal_name

Connect Tissue Res

authors

Hotton D,Davideau JL,Bernaudin JF,Berdal A

doi

10.3109/03008209509013716

subject

Has Abstract

pub_date

1995-01-01 00:00:00

pages

137-43

issue

1-4

eissn

0300-8207

issn

1607-8438

journal_volume

32

pub_type

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