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2016 ; 126
(8
): 2867-80
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Schlafen 4-expressing myeloid-derived suppressor cells are induced during murine
gastric metaplasia
#MMPMID27427984
Ding L
; Hayes MM
; Photenhauer A
; Eaton KA
; Li Q
; Ocadiz-Ruiz R
; Merchant JL
J Clin Invest
2016[Aug]; 126
(8
): 2867-80
PMID27427984
show ga
Chronic Helicobacter pylori infection triggers neoplastic transformation of the
gastric mucosa in a small subset of patients, but the risk factors that induce
progression to gastric metaplasia have not been identified. Prior to cancer
development, the oxyntic gastric glands atrophy and are replaced by metaplastic
cells in response to chronic gastritis. Previously, we identified schlafen 4
(Slfn4) as a GLI1 target gene and myeloid differentiation factor that correlates
with spasmolytic polypeptide-expressing metaplasia (SPEM) in mice. Here, we
tested the hypothesis that migration of SLFN4-expressing cells from the bone
marrow to peripheral organs predicts preneoplastic changes in the gastric
microenvironment. Lineage tracing in Helicobacter-infected Slfn4 reporter mice
revealed that SLFN4+ cells migrated to the stomach, where they exhibited
myeloid-derived suppressor cell (MDSC) markers and acquired the ability to
inhibit T cell proliferation. SLFN4+ MDSCs were not observed in infected
GLI1-deficient mice. Overexpression of sonic hedgehog ligand (SHH) in infected WT
mice accelerated the appearance of SLFN4+ MDSCs in the gastric corpus. Similarly,
in the stomachs of H. pylori-infected patients, the human SLFN4 ortholog SLFN12L
colocalized to cells that expressed MDSC surface markers CD15+CD33+HLA-DRlo.
Together, these results indicate that SLFN4 marks a GLI1-dependent population of
MDSCs that predict a shift in the gastric mucosa to a metaplastic phenotype.