Transcription factor Ets1 regulates expression of thioredoxin-interacting protein and inhibits insulin secretion in pancreatic β-cells
Long-term activation of extracellular-regulated kinase (ERK1/2) pathway has been shown to cause glucotoxicity and inhibit insulin gene expression in β-cells. Transcription factor Ets1 is activated by ERK1/2-mediated phosphorylation at the Thr38 residue. We hypothesize that Ets1 plays an important role in mediating ERK1/2 induced glucotoxicity in β-cells. We determined the role of Ets1 in Min6 cells and isolated mouse islets using overexpression and siRNA mediated knockdown of Ets1. The results show that Ets1 was localized in insulin-staining positive cells but not in glucagon-staining positive cells. Overexpression of Ets1 reduced glucose-stimulated insulin secretion in primary mouse islets. Overexpression of Ets1 in Min6 β-cells and mouse islets increased expression of thioredoxin-interacting protein (TXNIP). Conversely, knockdown of Ets1 by siRNA reduced expression of TXNIP in Min6 cells. Ets1 was associated with the txnip promoter in min6 cells and transfection of 293 cells with Ets1 and p300 synergistically increased txnip promoter reporter activity. Moreover, overexpression of Ets1 inhibited Min6 cell proliferation. Our results suggest that Ets1, by promoting TXNIP expression, negatively regulates β-cell function. Thus, over-activation of Ets1 may contribute to diet-induced β-cell dysfunction.
| Medienart: |
E-Artikel |
|---|
| Erscheinungsjahr: |
2014 |
|---|---|
| Erschienen: |
2014 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:9 |
|---|---|
| Enthalten in: |
PloS one - 9(2014), 6 vom: 05., Seite e99049 |
| Sprache: |
Englisch |
|---|
| Beteiligte Personen: |
Luo, Yan [VerfasserIn] |
|---|
| Links: |
|---|
| Anmerkungen: |
Date Completed 22.10.2015 Date Revised 21.10.2021 published: Electronic-eCollection Citation Status MEDLINE |
|---|
| doi: |
10.1371/journal.pone.0099049 |
|---|
| funding: |
|
|---|---|
| Förderinstitution / Projekttitel: |
|
| PPN (Katalog-ID): |
NLM238875067 |
|---|
| LEADER | 01000naa a22002652 4500 | ||
|---|---|---|---|
| 001 | NLM238875067 | ||
| 003 | DE-627 | ||
| 005 | 20231224114729.0 | ||
| 007 | cr uuu---uuuuu | ||
| 008 | 231224s2014 xx |||||o 00| ||eng c | ||
| 024 | 7 | |a 10.1371/journal.pone.0099049 |2 doi | |
| 028 | 5 | 2 | |a pubmed24n0796.xml |
| 035 | |a (DE-627)NLM238875067 | ||
| 035 | |a (NLM)24897113 | ||
| 040 | |a DE-627 |b ger |c DE-627 |e rakwb | ||
| 041 | |a eng | ||
| 100 | 1 | |a Luo, Yan |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Transcription factor Ets1 regulates expression of thioredoxin-interacting protein and inhibits insulin secretion in pancreatic β-cells |
| 264 | 1 | |c 2014 | |
| 336 | |a Text |b txt |2 rdacontent | ||
| 337 | |a ƒaComputermedien |b c |2 rdamedia | ||
| 338 | |a ƒa Online-Ressource |b cr |2 rdacarrier | ||
| 500 | |a Date Completed 22.10.2015 | ||
| 500 | |a Date Revised 21.10.2021 | ||
| 500 | |a published: Electronic-eCollection | ||
| 500 | |a Citation Status MEDLINE | ||
| 520 | |a Long-term activation of extracellular-regulated kinase (ERK1/2) pathway has been shown to cause glucotoxicity and inhibit insulin gene expression in β-cells. Transcription factor Ets1 is activated by ERK1/2-mediated phosphorylation at the Thr38 residue. We hypothesize that Ets1 plays an important role in mediating ERK1/2 induced glucotoxicity in β-cells. We determined the role of Ets1 in Min6 cells and isolated mouse islets using overexpression and siRNA mediated knockdown of Ets1. The results show that Ets1 was localized in insulin-staining positive cells but not in glucagon-staining positive cells. Overexpression of Ets1 reduced glucose-stimulated insulin secretion in primary mouse islets. Overexpression of Ets1 in Min6 β-cells and mouse islets increased expression of thioredoxin-interacting protein (TXNIP). Conversely, knockdown of Ets1 by siRNA reduced expression of TXNIP in Min6 cells. Ets1 was associated with the txnip promoter in min6 cells and transfection of 293 cells with Ets1 and p300 synergistically increased txnip promoter reporter activity. Moreover, overexpression of Ets1 inhibited Min6 cell proliferation. Our results suggest that Ets1, by promoting TXNIP expression, negatively regulates β-cell function. Thus, over-activation of Ets1 may contribute to diet-induced β-cell dysfunction | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Research Support, Non-U.S. Gov't | |
| 650 | 7 | |a Carrier Proteins |2 NLM | |
| 650 | 7 | |a Ets1 protein, mouse |2 NLM | |
| 650 | 7 | |a Insulin |2 NLM | |
| 650 | 7 | |a Proto-Oncogene Protein c-ets-1 |2 NLM | |
| 650 | 7 | |a RNA, Messenger |2 NLM | |
| 650 | 7 | |a RNA, Small Interfering |2 NLM | |
| 650 | 7 | |a Txnip protein, mouse |2 NLM | |
| 650 | 7 | |a Thioredoxins |2 NLM | |
| 650 | 7 | |a 52500-60-4 |2 NLM | |
| 650 | 7 | |a Glucose |2 NLM | |
| 650 | 7 | |a IY9XDZ35W2 |2 NLM | |
| 700 | 1 | |a He, Fengli |e verfasserin |4 aut | |
| 700 | 1 | |a Hu, Li |e verfasserin |4 aut | |
| 700 | 1 | |a Hai, Luo |e verfasserin |4 aut | |
| 700 | 1 | |a Huang, Meifeng |e verfasserin |4 aut | |
| 700 | 1 | |a Xu, Zhipeng |e verfasserin |4 aut | |
| 700 | 1 | |a Zhang, Jingjing |e verfasserin |4 aut | |
| 700 | 1 | |a Zhou, Zhiguang |e verfasserin |4 aut | |
| 700 | 1 | |a Liu, Feng |e verfasserin |4 aut | |
| 700 | 1 | |a Dai, Yan-Shan |e verfasserin |4 aut | |
| 773 | 0 | 8 | |i Enthalten in |t PloS one |d 2006 |g 9(2014), 6 vom: 05., Seite e99049 |w (DE-627)NLM167327399 |x 1932-6203 |7 nnns |
| 773 | 1 | 8 | |g volume:9 |g year:2014 |g number:6 |g day:05 |g pages:e99049 |
| 856 | 4 | 0 | |u http://dx.doi.org/10.1371/journal.pone.0099049 |3 Volltext |
| 912 | |a GBV_USEFLAG_A | ||
| 912 | |a GBV_NLM | ||
| 951 | |a AR | ||
| 952 | |d 9 |j 2014 |e 6 |b 05 |h e99049 | ||