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- W1987293314 abstract "We have investigated the effects of antisense oligodeoxynucleotides (oligos) to islet amyloid polypeptide (IAPP) mRNA on the expression and secretion of IAPP and insulin, in the clonal beta-cell line HIT-T15. Phosphorothioate-modified oligos were cytotoxic compared with phosphodiester (D)-oligos. Of the nine oligos tested using a lipofection reagent, O3, a 30-mer D-oligo complementary to a sequence downstream of the IAPP initiation codon, showed a significant dose-dependent suppression of IAPP mRNA, with a 42% decrease at 7.5 microM, compared with a scrambled (MSO3) control oligo (n = 3, P < 0.01). A subsequent 89% suppression of IAPP release was observed in the 4-h period following antisense treatment (1.78 +/- 0.13 (MSO3) vs 0.19 +/- 0.14 (O3) pmol/10(6) cells per 240 min, n = 7, P < 0.01). A significant increase in insulin mRNA (100 +/- 10% (MSO3) vs 124 +/- 8% (O3), n = 3, P < 0.05) and insulin content (13.0 +/- 0.9 (MSO3) vs 17.4 +/- 1.4 (O3) pmol/10(6) cells, n = 7, P = 0.028) was observed following treatment with O3 at 7.5 microM. O8, a 20-mer D-oligo directed to a region of IAPP mRNA further downstream than O3, also showed a decrease in IAPP mRNA and peptide release and an increase in insulin content. No significant changes were observed in the expression and release of the unrelated beta-cell peptide, neuropeptide Y. We thus show a suppression of synthesis and release of IAPP in HIT-T15 cells using antisense oligos. The associated increase in insulin mRNA and content in these cells after treatment with IAPP antisense oligos is in accord with an inhibitor action of IAPP on insulin availability." @default.
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- W1987293314 date "1996-12-01" @default.
- W1987293314 modified "2023-10-13" @default.
- W1987293314 title "Investigation of the effects of antisense oligodeoxynucleotides to islet amyloid polypeptide mRNA on insulin release, content and expression" @default.
- W1987293314 doi "https://doi.org/10.1677/joe.0.1510341" @default.
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