{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T01:25:56Z","timestamp":1760145956703,"version":"build-2065373602"},"reference-count":31,"publisher":"MDPI AG","issue":"17","license":[{"start":{"date-parts":[[2024,9,5]],"date-time":"2024-09-05T00:00:00Z","timestamp":1725494400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"National Institutes of Health","award":["RO1DK091845"],"award-info":[{"award-number":["RO1DK091845"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJMS"],"abstract":"<jats:p>Amylin promoter and transcriptional factors are well-established, inducible factors in the production of the main amyloidogenic pancreatic hormone, human islet amyloid peptide (hIAPP) or amylin. However, posttranscriptional mechanisms driving hIAPP expression in pancreas remain enigmatic, and hence were explored here. The translational assay revealed that both 5\u2032 and 3\u2032 untranslated regions (UTRs) of hIAPP restricted expression of the luciferase constructs only in constructs driven by the hIAPP promoter. Bioinformatics analysis revealed several putative seed sequences for a dozen micro RNAs (miRNAs) in hIAPP\u2019s 3\u2032 UTR. miR-182, miR-335, and miR-495 were the most downregulated miRNAs in stressed human islets exposed to endoplasmic reticulum (ER) or metabolic stressors, thapsigargin (TG) or high glucose (HG). Correspondingly, miR-335 mimics alone or in combination with miR-495 and miR-182 mimics significantly and potently (&gt;3-fold) reduced hIAPP protein expression in HG-treated cultured human islets. siRNA-mediated silencing of Ago2 but not Ago1 significantly stimulated hIAPP expression and secretion from transfected, HG-treated human islets. Conversely, ectopic expression of Ago2 in hIAPP-expressing RIN-m5F cell line driven by CMV promoter reduced hIAPP intracellular protein levels. Collectively, the results point to a novel and synergistic role for hIAPP promoter, 5\/3\u2032 UTRs and Ago-2\/miR-335 complex in post-transcriptional regulation of hIAPP gene expression in normal and metabolically active \u03b2-cells.<\/jats:p>","DOI":"10.3390\/ijms25179614","type":"journal-article","created":{"date-parts":[[2024,9,5]],"date-time":"2024-09-05T04:15:11Z","timestamp":1725509711000},"page":"9614","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["UTRs and Ago-2\/miR-335 Complex Restricts Amylin Translation in Insulinoma and Human Pancreatic \u03b2-Cells"],"prefix":"10.3390","volume":"25","author":[{"ORCID":"https:\/\/orcid.org\/0009-0003-5124-8057","authenticated-orcid":false,"given":"Zhanar","family":"Kudaibergenova","sequence":"first","affiliation":[{"name":"Department of Biological Sciences, The George Washington University, Washington, DC 20052, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Satyabrata","family":"Pany","sequence":"additional","affiliation":[{"name":"Department of Biological Sciences, The George Washington University, Washington, DC 20052, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Elizabeth","family":"Placheril","sequence":"additional","affiliation":[{"name":"Department of Biological Sciences, The George Washington University, Washington, DC 20052, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Aleksandar M.","family":"Jeremic","sequence":"additional","affiliation":[{"name":"Department of Biological Sciences, The George Washington University, Washington, DC 20052, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2024,9,5]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"107","DOI":"10.2991\/jegh.k.191028.001","article-title":"Epidemiology of Type 2 Diabetes\u2014Global Burden of Disease and Forecasted Trends","volume":"10","author":"Khan","year":"2020","journal-title":"J. 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