Abstract
Dipeptidyl peptidase 9 (DPP9) is a ubiquitous intracellular post-proline protease of the DPP4 (S9b) family of atypical serine proteases. Emerging data support roles for DPP9 in intracellular signalling, particularly in the epidermal growth factor receptor pathway, in immune cells, particularly in macrophages and antigen processing, and in energy metabolism. The focus of this review is the roles of DPP9 in regulating physiological and cellular processes. Such data is derived from a genetically modified mouse strain and from manipulations of cell lines. The mouse strain that lacks DPP9 enzyme activity is homozygous lethal. DPP9 alters behaviours, such as cell adhesion, of cancer cell lines. This review points to the functional importance of DPP9 in immunity, metabolism and cancer.
Abbreviations
- AMC:
-
Amino methylcoumarin
- AMPK:
-
AMP-activated protein kinase
- B-CLL:
-
B-cell chronic lymphocytic leukaemia
- CAF:
-
Cancer-associated fibroblasts
- CXCL:
-
CXC chemokine ligand
- DEN:
-
Diethylnitrosamine
- DPP:
-
Dipeptidyl peptidase
- DSS:
-
Dextran sulphate sodium
- DTT:
-
Dithiothreitol
- ECM:
-
Extracellular matrix
- EGF:
-
Epidermal growth factor
- EGFR:
-
Epidermal growth factor receptor
- EMT:
-
Epithelial–mesenchymal transition
- ESFT:
-
Ewing sarcoma family of tumours
- FAP:
-
Fibroblast activation protein
- FGF:
-
Fibroblast growth factor
- HCC:
-
Hepatocellular carcinoma
- HFD:
-
High fat diet
- HSC:
-
Hepatic stellate cells
- IRS:
-
Insulin receptor substrate
- IκBα:
-
Nuclear factor of kappa light polypeptide gene enhancer in B-cells inhibitor, alpha
- MMP:
-
Matrix metalloproteinase
- NEM:
-
N-ethylmaleimide
- NPY:
-
Neuropeptide Y
- PARP:
-
Poly(ADP-ribose) polymerase
- PGC-1α:
-
PPAR coactivator-1α
- PBMC:
-
Peripheral blood mononuclear cells
- pNA:
-
P-nitroaniline
- POP:
-
Prolyl oligopeptidase
- PPAR:
-
Peroxisome proliferator-activated receptor
- SUMO:
-
Small ubiquitin-like modifier
- TAA:
-
Thioacetamide
- TAM:
-
Tumour-associated macrophages
- TGF:
-
Transforming growth factor
- TNF-α:
-
Tumour necrosis factor α
- VEGF-A:
-
Vascular endothelial growth factor-A
- WT:
-
Wild-type
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Acknowledgements
This work was supported by National Health and Medical Research Council of Australia Project Grants 512282 and 1113842 (MDG), and a Sydney Medical School Foundation/Francis M. Hooper Scholarship for Medical Research through the University of Sydney (MGG).
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Gall, M.G., Gorrell, M.D. (2017). The Multifunctional Post-proline Dipeptidyl Peptidase, DPP9, in Mice, Cell Biology and Immunity. In: Chakraborti, S., Dhalla, N. (eds) Pathophysiological Aspects of Proteases. Springer, Singapore. https://doi.org/10.1007/978-981-10-6141-7_2
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Publisher Name: Springer, Singapore
Print ISBN: 978-981-10-6140-0
Online ISBN: 978-981-10-6141-7
eBook Packages: Biomedical and Life SciencesBiomedical and Life Sciences (R0)