Mesenchymal stem cell (MSC)-mediated survival of insulin producing pancreatic ß-cells during cellular stress involves signalling via Akt and ERK1/2.
Mol Cell Endocrinol
; 473: 235-244, 2018 09 15.
Article
de En
| MEDLINE
| ID: mdl-29421520
ABSTRACT
Mesenchymal stem cells (MSC) are of interest for cell therapy since their secreted factors mediate immunomodulation and support tissue regeneration. This study investigated the direct humoral interactions between MSC and pancreatic ß-cells using human telomerase-immortalized MSC (hMSC-TERT) and rat insulinoma-derived INS-1E ß-cells. hMSC-TERT supported survival of cocultured INS-1E ß-cells during cellular stress by alloxan (ALX) and streptozotocin (STZ), but not in response to IL-1ß. Accordingly, hMSC-TERT had no effect on inflammatory cytokine-related signalling via NF-kB and p-JNK but maintained p-Akt and upregulated p-ERK1/2. Inhibition of either p-Akt or p-ERK1/2 did not abolish protection by hMSC-TERT but activated the respective non-inhibited pathway. This suggests that one pathway compensates for the other. Main results were confirmed in mouse islets except hMSC-TERT-mediated upregulation of p-ERK1/2. Therefore, MSC promote ß-cell survival by preservation of p-Akt signalling and further involve p-ERK1/2 activation in certain conditions such as loss of p-Akt or insulinoma background.
Mots clés
Texte intégral:
1
Collection:
01-internacional
Base de données:
MEDLINE
Sujet principal:
Stress physiologique
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Système de signalisation des MAP kinases
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Cellules à insuline
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Protéines proto-oncogènes c-akt
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Cellules souches mésenchymateuses
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Insuline
Limites:
Animals
/
Humans
Langue:
En
Journal:
Mol Cell Endocrinol
Année:
2018
Type de document:
Article
Pays d'affiliation:
États-Unis d'Amérique