Leinenkugel G, Kong B, Raulefs S, Miller K, Roth S, Jiang H, Istvánffy R, Heikenwälder H, Maeritz N, Regel I, Abiatari I, Kleeff J, Michalski CW, Rieder S. Sca-1 is a marker for cell plasticity in murine pancreatic epithelial cells and induced by IFN-β in vitro.
Pancreatology 2022;
22:294-303. [PMID:
35120820 DOI:
10.1016/j.pan.2022.01.006]
[Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/18/2021] [Revised: 11/16/2021] [Accepted: 01/11/2022] [Indexed: 12/11/2022]
Abstract
BACKGROUND & AIMS
Sca-1 is a surface marker for murine hematopoietic stem cells (HSCs) and type-I interferon is a key regulator for Lin-Sca-1+ HSCs expansion through Ifnar/Stat-1/Sca-1-signaling. In this study we aimed to characterize the role and regulation of Sca-1+ cells in pancreatic regeneration.
METHODS
To characterize Sca-1 in vivo, immunohistochemistry and immunofluorescence staining of Sca-1 was conducted in normal pancreas, in cerulein-mediated acute pancreatitis, and in Kras-triggered cancerous lesions. Ifnar/Stat-1/Sca-1-signaling was studied in type-I IFN-treated epithelial explants of adult wildtype, Ifnar-/-, and Stat-1-/- mice. Sca-1 induction was analyzed by gene expression and FACS analysis. After isolation of pancreatic epithelial Lin-Sca-1+cells, pancreatosphere-formation and immunofluorescence-assays were carried out to investigate self-renewal and differentiation capabilities.
RESULTS
Sca-1+ cells were located in periacinar and periductal spaces and showed an enrichment during cerulein-induced acute pancreatitis (23.2/100 μm2 ± 4.9 SEM) and in early inflammation-mediated carcinogenic lesions of the pancreas of KrasG12D mice (35.8/100 μm2 ± SEM 1.9) compared to controls (3.6/100 μm2 ± 1.3 SEM). Pancreatic Lin-Sca-1+ cells displayed a small population of 1.46% ± 0.12 SEM in FACS. In IFN-β treated pancreatic epithelial explants, Sca-1 expression was increased, and Lin-Sca-1+ cells were enriched in vitro (from 1.49% ± 0.36 SEM to 3.85% ± 0.78 SEM). Lin-Sca-1+ cells showed a 12 to 51-fold higher capacity for clonal self-renewal compared to Lin-Sca-1- cells and generated cells express markers of the acinar and ductal compartment.
CONCLUSIONS
Pancreatic Sca-1+ cells enriched during parenchymal damage showed a significant capacity for cell renewal and in vitro plasticity, suggesting that corresponding to the type I interferon-dependent regulation of Lin-Sca-1+ hematopoietic stem cells, pancreatic Sca-1+ cells also employ type-I-interferon for regulating progenitor-cell-homeostasis.
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