RT Journal Article
SR Electronic
T1 Paneth cell–derived growth factors support tumorigenesis in the small intestine
JF Life Science Alliance
JO Life Sci. Alliance
FD Life Science Alliance LLC
SP e202000934
DO 10.26508/lsa.202000934
VO 4
IS 3
A1 Chen, Qing
A1 Suzuki, Kohei
A1 Sifuentes-Dominguez, Luis
A1 Miyata, Naoteru
A1 Song, Jie
A1 Lopez, Adam
A1 Starokadomskyy, Petro
A1 Gopal, Purva
A1 Dozmorov, Igor
A1 Tan, Shuai
A1 Ge, Bujun
A1 Burstein, Ezra
YR 2021
UL https://www.life-science-alliance.org/content/4/3/e202000934.abstract
AB Paneth cells (PCs) are small intestinal epithelial cells that secrete antimicrobial peptides and growth factors, such as Wnt ligands. Intriguingly, the context in which PC-derived Wnt secretion is relevant in vivo remains unknown as intestinal epithelial ablation of Wnt does not affect homeostatic proliferation or restitution after irradiation injury. Considering the importance of growth factors in tumor development, we explored here the role of PCs in intestinal carcinogenesis using a genetic model of PC depletion through conditional expression of diphtheria toxin-α subunit. PC depletion in ApcMin mice impaired adenoma development in the small intestine and led to decreased Wnt3 expression in small bowel adenomas. To determine if PC-derived Wnt3 was required for adenoma development, we examined tumor formation after PC-specific ablation of Wnt3. We found that this was sufficient to decrease small intestinal adenoma formation; moreover, organoids derived from these tumors displayed slower growth capacity. Overall, we report that PC-derived Wnt3 is required to sustain early tumorigenesis in the small bowel and identify a clear role for PC-derived Wnt production in intestinal pathology.