Reference SummarySun X, Mol Cancer 2009;8():73
Title |
The proprotein convertase PC5/6 is protective against intestinal tumorigenesis: in vivo mouse model. |
Authors |
Sun X; Essalmani R; Seidah NG; Prat A |
Journal |
Mol Cancer |
Volume |
8 |
Issue |
|
Year |
2009 |
Pages |
73 |
Abstract |
BACKGROUND: The secretory basic amino acid-specific proprotein convertases (PCs) have often been associated with cancer/metastasis. By controlling the cleavage of cancer-associated proteins, PCs play key roles in multiple steps of cancer development. Most analyses of the implication of PCs in cancer/metastasis relied on the use of in vitro overexpression systems or inhibitors that can affect more than one PC. Aside from the role of furin in salivary gland tumorigenesis, no other in vivo genetic model of PC-knockout was reported in relation to cancer development. RESULTS: Since PC5/6 is highly expressed in the small intestine, the present study examined its in vivo role in intestinal tumorigenesis. Analysis of human intestinal tumors at various stages showed a systematic down-regulation of PC5/6 expression. Since gene inactivation of PC5/6 leads to lethality at birth, we generated mice lacking PC5/6 in enterocytes and analyzed the impact of the presence or absence of this PC in the mouse ApcMin/+ model that develops numerous adenocarcinomas along the intestinal tract. This resulted in viable mice with almost no expression of PC5/6 in small intestine, but with no overt phenotype. The data showed that by themselves ApcMin/+ tumors express lower levels of PC5/6 mRNA, and that the lack of PC5/6 in enterocytes results in a significantly higher tumor number in the duodenum, with a similar trend in other intestinal segments. Finally, the absence of PC5/6 is also associated with a premature mortality of ApcMin/+ mice. CONCLUSION: Overall, these data suggest that intestinal PC5/6 is protective towards tumorigenesis, especially in mouse duodenum, and possibly in human colon. |
Links |
J:220950 – MGI References 19737405 – National Library of Medicine/PubMed |
| Strain | Model Name | Treatment Agent(s) | Organ Affected | Frequency | Model Details |
|---|---|---|---|---|---|
| STOCK ApcMin/+ Pcsk5tm2Prat | Intestine - Large Intestine - Colon tumor | Intestine - Large Intestine - Colon |
63.64 |
||
| STOCK ApcMin/+ Pcsk5tm2Prat Tg(Vil1-cre)997Gum | Intestine - Large Intestine - Colon tumor | Intestine - Large Intestine - Colon |
52.94 |
||
| C57BL/6J-ApcMin/+ | Intestine - Small Intestine - Duodenum tumor | Intestine - Small Intestine - Duodenum |
observed |
||
| STOCK ApcMin/+ Pcsk5tm2Prat | Intestine - Small Intestine - Duodenum tumor | Intestine - Small Intestine - Duodenum |
90.91 |
||
| STOCK ApcMin/+ Pcsk5tm2Prat Tg(Vil1-cre)997Gum | Intestine - Small Intestine - Duodenum tumor | Intestine - Small Intestine - Duodenum |
100 |
||
| C57BL/6J-ApcMin/+ | Intestine - Small Intestine - Ileum tumor | Intestine - Small Intestine - Ileum |
observed |
||
| STOCK ApcMin/+ Pcsk5tm2Prat | Intestine - Small Intestine - Ileum tumor | Intestine - Small Intestine - Ileum |
100 |
||
| STOCK ApcMin/+ Pcsk5tm2Prat Tg(Vil1-cre)997Gum | Intestine - Small Intestine - Ileum tumor | Intestine - Small Intestine - Ileum |
100 |
||
| C57BL/6J-ApcMin/+ | Intestine - Small Intestine - Jejunum tumor | Intestine - Small Intestine - Jejunum |
observed |
||
| STOCK ApcMin/+ Pcsk5tm2Prat | Intestine - Small Intestine - Jejunum tumor | Intestine - Small Intestine - Jejunum |
100 |
||
| STOCK ApcMin/+ Pcsk5tm2Prat Tg(Vil1-cre)997Gum | Intestine - Small Intestine - Jejunum tumor | Intestine - Small Intestine - Jejunum |
100 |
||
| C57BL/6J-ApcMin/+ | Intestine - Small Intestine tumor | Intestine - Small Intestine |
observed |
||
| C57BL/6J-ApcMin/+ | Intestine adenocarcinoma | Intestine |
observed |
||
| STOCK ApcMin/+ Pcsk5tm2Prat | Intestine tumor | Intestine |
100 |
||
| STOCK ApcMin/+ Pcsk5tm2Prat Tg(Vil1-cre)997Gum | Intestine tumor | Intestine |
100 |