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@ARTICLE{Huang:300266,
author = {J. C. Huang and X. L. Tong and M. S. W. Xiang and B. B.
Boumelhem and D. P. Foulis and M. Zhang and C. A. McKenzie
and G. W. McCaughan and T. Reinheckel$^*$ and H. E. Zhang
and M. D. Gorrell},
title = {{D}ipeptidyl peptidase 9 ({DPP}9) depletion from
hepatocytes in experimental primary liver cancer.},
journal = {Biochimica et biophysica acta / Molecular basis of disease},
volume = {1871},
number = {5},
issn = {0006-3002},
address = {Amsterdam},
publisher = {Elsevier},
reportid = {DKFZ-2025-00719},
pages = {167819},
year = {2025},
abstract = {Dipeptidyl peptidase 9 (DPP9) is an indispensable
intracellular protease. Among its many molecular functions
is suppression of the NLRP1 inflammasome. Inhibitors
targeting all four proteases of the DPP4 family, including
DPP9, can reduce tumour burden, including in mouse liver. To
explore hepatocyte DPP9 in experimental hepatocellular
carcinoma (HCC), we generated hepatocyte-specific DPP9-KO
mice by crossing albumin-Cre mice with DPP9 floxed mice and
treated sequentially with diethylnitrosamine, then with
thioacetamide combined with an atherogenic high-fat diet
until 28 weeks of age. DPP9-KO mice had less body, liver and
subcutaneous adipose tissue mass, lower fasting plasma
glucose and fewer small macroscopic liver nodules compared
to DPP9-WT control mice. However, there were no differences
in the total number of macroscopic liver nodules, or of
microscopic tumour burden, inflammation, fibrosis or
steatosis. Consistent with the known function of DPP9 to
suppress NLRP1 activation, activated caspase-1 protein and
inflammation markers Nfkbib, Cxcl10 and Ccl5 were elevated
in DPP9-KO liver. The tumour suppressor protein p53 was
increased and the autophagy proteins beclin1, LC3B and p62
were altered. In conclusion, hepatocyte-specific DPP9 gene
deletion in experimental primary liver cancer improved
energy metabolism and may reduce liver cancer initiation,
via mechanisms that may include increased autophagy and
tumour suppression.},
keywords = {Adiposity (Other) / Autophagy (Other) / Dipeptidyl
peptidase 9 (Other) / Glucose homeostasis (Other) /
Hepatocellular carcinoma (Other) / Histopathology (Other) /
Inflammasome (Other) / Serine protease (Other) / tp53
(Other)},
cin = {FR01},
ddc = {610},
cid = {I:(DE-He78)FR01-20160331},
pnm = {899 - ohne Topic (POF4-899)},
pid = {G:(DE-HGF)POF4-899},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:40187163},
doi = {10.1016/j.bbadis.2025.167819},
url = {https://inrepo02.dkfz.de/record/300266},
}