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The scaffold-dependent function of RIPK1 in dendritic cells promotes injury-induced colitis.

Publication ,  Journal Article
Moriwaki, K; Park, C; Koyama, K; Balaji, S; Kita, K; Yagi, R; Komazawa-Sakon, S; Semba, M; Asuka, T; Nakano, H; Kamada, Y; Miyoshi, E; Chan, FKM
Published in: Mucosal Immunol
January 2022

Receptor interacting protein kinase 1 (RIPK1) is a cytosolic multidomain protein that controls cell life and death. While RIPK1 promotes cell death through its kinase activity, it also functions as a scaffold protein to promote cell survival by inhibiting FADD-caspase 8-dependent apoptosis and RIPK3-MLKL-dependent necroptosis. This pro-survival function is highlighted by excess cell death and perinatal lethality in Ripk1-/- mice. Recently, loss of function mutation of RIPK1 was found in patients with immunodeficiency and inflammatory bowel diseases. Hematopoietic stem cell transplantation restored not only immunodeficiency but also intestinal inflammatory pathology, indicating that RIPK1 in hematopoietic cells is critical to maintain intestinal immune homeostasis. Here, we generated dendritic cell (DC)-specific Ripk1-/- mice in a genetic background with loss of RIPK1 kinase activity and found that the mice developed spontaneous colonic inflammation characterized by increased neutrophil and Ly6C+ monocytes. In addition, these mice were highly resistant to injury-induced colitis. The increased colonic inflammation and the resistance to colitis were restored by dual inactivation of RIPK3 and FADD, but not by inhibition of RIPK3, MLKL, or ZBP1 alone. Altogether, these results reveal a scaffold activity-dependent role of RIPK1 in DC-mediated maintenance of colonic immune homeostasis.

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Published In

Mucosal Immunol

DOI

EISSN

1935-3456

Publication Date

January 2022

Volume

15

Issue

1

Start / End Page

84 / 95

Location

United States

Related Subject Headings

  • Tissue Scaffolds
  • Receptor-Interacting Protein Serine-Threonine Kinases
  • Neutrophils
  • Monocytes
  • Mice, Knockout
  • Mice
  • Inflammatory Bowel Diseases
  • Immunology
  • Immunologic Deficiency Syndromes
  • Humans
 

Citation

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Moriwaki, K., Park, C., Koyama, K., Balaji, S., Kita, K., Yagi, R., … Chan, F. K. M. (2022). The scaffold-dependent function of RIPK1 in dendritic cells promotes injury-induced colitis. Mucosal Immunol, 15(1), 84–95. https://doi.org/10.1038/s41385-021-00446-y
Moriwaki, Kenta, Christa Park, Kazuha Koyama, Sakthi Balaji, Kohei Kita, Ryoko Yagi, Sachiko Komazawa-Sakon, et al. “The scaffold-dependent function of RIPK1 in dendritic cells promotes injury-induced colitis.Mucosal Immunol 15, no. 1 (January 2022): 84–95. https://doi.org/10.1038/s41385-021-00446-y.
Moriwaki K, Park C, Koyama K, Balaji S, Kita K, Yagi R, et al. The scaffold-dependent function of RIPK1 in dendritic cells promotes injury-induced colitis. Mucosal Immunol. 2022 Jan;15(1):84–95.
Moriwaki, Kenta, et al. “The scaffold-dependent function of RIPK1 in dendritic cells promotes injury-induced colitis.Mucosal Immunol, vol. 15, no. 1, Jan. 2022, pp. 84–95. Pubmed, doi:10.1038/s41385-021-00446-y.
Moriwaki K, Park C, Koyama K, Balaji S, Kita K, Yagi R, Komazawa-Sakon S, Semba M, Asuka T, Nakano H, Kamada Y, Miyoshi E, Chan FKM. The scaffold-dependent function of RIPK1 in dendritic cells promotes injury-induced colitis. Mucosal Immunol. 2022 Jan;15(1):84–95.

Published In

Mucosal Immunol

DOI

EISSN

1935-3456

Publication Date

January 2022

Volume

15

Issue

1

Start / End Page

84 / 95

Location

United States

Related Subject Headings

  • Tissue Scaffolds
  • Receptor-Interacting Protein Serine-Threonine Kinases
  • Neutrophils
  • Monocytes
  • Mice, Knockout
  • Mice
  • Inflammatory Bowel Diseases
  • Immunology
  • Immunologic Deficiency Syndromes
  • Humans