Insulin Gene Can Be Expressed in the Absence of Isl-1

The possible role of Isl-1 in insulin-gene transcription was investigated using Northern blot analysis to determine whether insulin and Isl-1 gene expression are correlated in various somatic cell hybrids. Among several hybrid cell lines obtained by fusing insulin-producing rat insulinoma (RIN) cell...

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Veröffentlicht in:Experimental cell research 1993-11, Vol.209 (1), p.58-63
Hauptverfasser: Dandoy-Dron, Francoise, Deltour, Louise, Monthioux, Eliane, Bucchini, Danielle, Jami, Jacques
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container_issue 1
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container_title Experimental cell research
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creator Dandoy-Dron, Francoise
Deltour, Louise
Monthioux, Eliane
Bucchini, Danielle
Jami, Jacques
description The possible role of Isl-1 in insulin-gene transcription was investigated using Northern blot analysis to determine whether insulin and Isl-1 gene expression are correlated in various somatic cell hybrids. Among several hybrid cell lines obtained by fusing insulin-producing rat insulinoma (RIN) cells and mouse spleen cells, three (RR2, RR5, and RR11) had amounts of insulin transcripts similar to those of the parental RIN cells, although two of them, RR5 and RR11, lacked Isl-1 protein. In contrast, two R1N × mouse L cell hybrids where insulin expression was extinct still expressed Isl-1. RT-PCR analysis showed that Isl-1 transcripts are widely distributed in various mouse tissues, including pancreas, brain, lung, thymus, and ovary. These results indicate that Is-1 is not essential for insulin gene expression.
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source MEDLINE; Elsevier ScienceDirect Journals
subjects Animals
Base Sequence
Biological and medical sciences
Blotting, Northern
Blotting, Western
Cell Line
DNA-Binding Proteins - pharmacology
Fundamental and applied biological sciences. Psychology
Gene Expression Regulation
Homeodomain Proteins
Hybrid Cells
Insulin - genetics
Insulinoma - genetics
L Cells (Cell Line)
LIM-Homeodomain Proteins
Mice
Molecular and cellular biology
Molecular genetics
Molecular Sequence Data
Nerve Tissue Proteins
Rats
Spleen
Transcription Factors
Transcription. Transcription factor. Splicing. Rna processing
title Insulin Gene Can Be Expressed in the Absence of Isl-1
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