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Lee JW, Hur J, Kwon YW, Chae CW, Choi JI, Hwang I, Yun JY, Kang JA, Choi YE, Kim YH, Lee SE, Lee C, Jo DH, Seok H, Cho BS, Baek SH, Kim HS. KAI1(CD82) is a key molecule to control angiogenesis and switch angiogenic milieu to quiescent state. J Hematol Oncol 2021; 14:148. [PMID: 34530889 PMCID: PMC8444549 DOI: 10.1186/s13045-021-01147-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Accepted: 08/25/2021] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Little is known about endogenous inhibitors of angiogenic growth factors. In this study, we identified a novel endogenous anti-angiogenic factor expressed in pericytes and clarified its underlying mechanism and clinical significance. METHODS Herein, we found Kai1 knockout mice showed significantly enhanced angiogenesis. Then, we investigated the anti-angiogenic roll of Kai1 in vitro and in vivo. RESULTS KAI1 was mainly expressed in pericytes rather than in endothelial cells. It localized at the membrane surface after palmitoylation by zDHHC4 enzyme and induced LIF through the Src/p53 pathway. LIF released from pericytes in turn suppressed angiogenic factors in endothelial cells as well as in pericytes themselves, leading to inhibition of angiogenesis. Interestingly, KAI1 had another mechanism to inhibit angiogenesis: It directly bound to VEGF and PDGF and inhibited activation of their receptors. In the two different in vivo cancer models, KAI1 supplementation significantly inhibited tumor angiogenesis and growth. A peptide derived from the large extracellular loop of KAI1 has been shown to have anti-angiogenic effects to block the progression of breast cancer and retinal neovascularization in vivo. CONCLUSIONS KAI1 from PC is a novel molecular regulator that counterbalances the effect of angiogenic factors.
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Affiliation(s)
- Jin-Woo Lee
- National Research Laboratory for Stem Cell Niche, Center for Medical Innovation, Seoul National University Hospital, Seoul, Republic of Korea
- Center of Cell- and Bio-Therapy (CBT), Seoul National University Hospital, Seoul, Republic of Korea
| | - Jin Hur
- Department of Convergence Medicine, Pusan National University School of Medicine, Yangsan, Republic of Korea
| | - Yoo-Wook Kwon
- National Research Laboratory for Stem Cell Niche, Center for Medical Innovation, Seoul National University Hospital, Seoul, Republic of Korea
- Center of Cell- and Bio-Therapy (CBT), Seoul National University Hospital, Seoul, Republic of Korea
| | - Cheong-Whan Chae
- National Research Laboratory for Stem Cell Niche, Center for Medical Innovation, Seoul National University Hospital, Seoul, Republic of Korea
- Center of Cell- and Bio-Therapy (CBT), Seoul National University Hospital, Seoul, Republic of Korea
| | - Jae-Il Choi
- National Research Laboratory for Stem Cell Niche, Center for Medical Innovation, Seoul National University Hospital, Seoul, Republic of Korea
- Center of Cell- and Bio-Therapy (CBT), Seoul National University Hospital, Seoul, Republic of Korea
| | - Injoo Hwang
- National Research Laboratory for Stem Cell Niche, Center for Medical Innovation, Seoul National University Hospital, Seoul, Republic of Korea
- Center of Cell- and Bio-Therapy (CBT), Seoul National University Hospital, Seoul, Republic of Korea
| | - Ji-Yeon Yun
- National Research Laboratory for Stem Cell Niche, Center for Medical Innovation, Seoul National University Hospital, Seoul, Republic of Korea
- Center of Cell- and Bio-Therapy (CBT), Seoul National University Hospital, Seoul, Republic of Korea
| | - Jin-A Kang
- National Research Laboratory for Stem Cell Niche, Center for Medical Innovation, Seoul National University Hospital, Seoul, Republic of Korea
- Center of Cell- and Bio-Therapy (CBT), Seoul National University Hospital, Seoul, Republic of Korea
| | - Young-Eun Choi
- National Research Laboratory for Stem Cell Niche, Center for Medical Innovation, Seoul National University Hospital, Seoul, Republic of Korea
- Center of Cell- and Bio-Therapy (CBT), Seoul National University Hospital, Seoul, Republic of Korea
| | - Young Hyun Kim
- National Research Laboratory for Stem Cell Niche, Center for Medical Innovation, Seoul National University Hospital, Seoul, Republic of Korea
- Center of Cell- and Bio-Therapy (CBT), Seoul National University Hospital, Seoul, Republic of Korea
- Department of Molecular Medicine and Biopharmaceutical Sciences, Graduate School of Convergence Science and Technology, and College of Medicine or College of Pharmacy, Seoul National University, Seoul, Republic of Korea
| | - Sang Eun Lee
- National Research Laboratory for Stem Cell Niche, Center for Medical Innovation, Seoul National University Hospital, Seoul, Republic of Korea
- Center of Cell- and Bio-Therapy (CBT), Seoul National University Hospital, Seoul, Republic of Korea
| | - Cheol Lee
- Department of Pathology, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Dong Hyun Jo
- Department of Anatomy, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Heeyoung Seok
- Genomics Core Facility, Department of Transdisciplinary Research and Collaboration, Biomedical Research Institute, Seoul National University Hospital, Seoul, Republic of Korea
| | - Byong Seung Cho
- ExoCoBio Inc, Gasan digital 1-ro, Geumcheon-gu, Seoul, 08594, Republic of Korea
| | - Sung Hee Baek
- Creative Research Initiative Center for Chromatin Dynamics, School of Biological Sciences, Seoul National University, Seoul, 151-742, Republic of Korea
| | - Hyo-Soo Kim
- National Research Laboratory for Stem Cell Niche, Center for Medical Innovation, Seoul National University Hospital, Seoul, Republic of Korea.
- Center of Cell- and Bio-Therapy (CBT), Seoul National University Hospital, Seoul, Republic of Korea.
- Department of Molecular Medicine and Biopharmaceutical Sciences, Graduate School of Convergence Science and Technology, and College of Medicine or College of Pharmacy, Seoul National University, Seoul, Republic of Korea.
- Department of Internal Medicine, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, Seoul, 110-744, Korea.
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