1
|
Dong J, Pan YB, Wu XR, He LN, Liu XD, Feng DF, Xu TL, Sun S, Xu NJ. A neuronal molecular switch through cell-cell contact that regulates quiescent neural stem cells. SCIENCE ADVANCES 2019; 5:eaav4416. [PMID: 30820459 PMCID: PMC6392779 DOI: 10.1126/sciadv.aav4416] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Accepted: 01/14/2019] [Indexed: 05/24/2023]
Abstract
The quiescence of radial neural stem cells (rNSCs) in adult brain is regulated by environmental stimuli. However, little is known about how the neurogenic niche couples the external signal to regulate activation and transition of quiescent rNSCs. Here, we reveal that long-term excitation of hippocampal dentate granule cells (GCs) upon voluntary running leads to activation of adult rNSCs in the subgranular zone and thereby generation of newborn neurons. Unexpectedly, the role of these excited GC neurons in NSCs depends on direct GC-rNSC interaction in the local niche, which is through down-regulated ephrin-B3, a GC membrane-bound ligand, and attenuated transcellular EphB2 kinase-dependent signaling in the adjacent rNSCs. Furthermore, constitutively active EphB2 kinase sustains the quiescence of rNSCs during running. These findings thus elucidate the physiological significance of GC excitability on adult rNSCs under external environments and indicate a key-lock switch regulation via cell-cell contact for functional transition of rNSCs.
Collapse
Affiliation(s)
- Jian Dong
- Collaborative Innovation Center for Brain Science, Department of Anatomy and Physiology, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
- Department of Biochemistry and Molecular Cell Biology, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Yuan-Bo Pan
- Department of Neurosurgery, Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Xin-Rong Wu
- Department of Neurology, Institute of Neurology, Rui-jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Li-Na He
- Collaborative Innovation Center for Brain Science, Department of Anatomy and Physiology, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Xian-Dong Liu
- Collaborative Innovation Center for Brain Science, Department of Anatomy and Physiology, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
- Department of Biochemistry and Molecular Cell Biology, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Dong-Fu Feng
- Department of Neurosurgery, Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Tian-Le Xu
- Collaborative Innovation Center for Brain Science, Department of Anatomy and Physiology, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
- Department of Biochemistry and Molecular Cell Biology, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Suya Sun
- Department of Neurology, Institute of Neurology, Rui-jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Nan-Jie Xu
- Collaborative Innovation Center for Brain Science, Department of Anatomy and Physiology, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
- Department of Biochemistry and Molecular Cell Biology, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
- Key Laboratory of Cell Differentiation and Apoptosis of the Chinese Ministry of Education, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
- Shanghai Key Laboratory of Reproductive Medicine, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| |
Collapse
|
2
|
Wei W, Wang H, Ji S. Paradoxes of the EphB1 receptor in malignant brain tumors. Cancer Cell Int 2017; 17:21. [PMID: 28194092 PMCID: PMC5299699 DOI: 10.1186/s12935-017-0384-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2016] [Accepted: 01/20/2017] [Indexed: 02/07/2023] Open
Abstract
Eph receptors are a subfamily of receptor tyrosine kinases. Eph receptor-mediated forward and ephrin ligand-mediated reverse signalings are termed bidirectional signaling. Increasing evidence shows that Eph/ephrin signaling regulates cell migration, adhesion, morphological changes, differentiation, proliferation and survival through cell–cell communication. Some recent studies have started to implicate Eph/ephrin signaling in tumorigenesis, metastasis, and angiogenesis. Previous studies have shown that EphB1 receptor and its ephrin ligands are expressed in the central nervous system. EphB1/ephrin signaling plays an important role in the regulation of synapse formation and maturation, migration of neural progenitors, establishment of tissue patterns, and the development of immune organs. Besides, various recent studies have detected the abnormal expression of EphB1 receptor in different brain tumors. However, the underlying molecular mechanisms of EphB1/ephrins signaling in the development of these tumors are not fully understood. This review focuses on EphB1 that has both tumor-suppressing and -promoting roles in some brain tumors. Understanding the intracellular mechanisms of EphB1 in tumorigenesis and metastasis of brain tumors might provide a foundation for the development of EphB1-targeted therapies.
Collapse
Affiliation(s)
- Wenqiang Wei
- Laboratory of Cell Signal Transduction, Medical School, Henan University, Kaifeng, 475004 China.,Department of Microbiology, Medical School, Henan University, Kaifeng, 475004 China
| | - Hongju Wang
- Department of Anatomy, Medical School, Henan University, Kaifeng, 475004 China
| | - Shaoping Ji
- Laboratory of Cell Signal Transduction, Medical School, Henan University, Kaifeng, 475004 China.,Department of Oncology, The First Affiliated Hospital, Henan University, Kaifeng, 475001 China
| |
Collapse
|
3
|
Li J, Zhang J, Tang M, Xin J, Xu Y, Volk A, Hao C, Hu C, Sun J, Wei W, Cao Q, Breslin P, Zhang J. Hematopoietic Stem Cell Activity Is Regulated by Pten Phosphorylation Through a Niche-Dependent Mechanism. Stem Cells 2016; 34:2130-44. [PMID: 27096933 DOI: 10.1002/stem.2382] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2015] [Revised: 03/19/2016] [Accepted: 03/26/2016] [Indexed: 12/21/2022]
Abstract
The phosphorylated form of Pten (p-Pten) is highly expressed in >70% of acute myeloid leukemia samples. However, the role of p-Pten in normal and abnormal hematopoiesis has not been studied. We found that Pten protein levels are comparable among long-term (LT) hematopoietic stem cells (HSCs), short-term (ST) HSCs, and multipotent progenitors (MPPs); however, the levels of p-Pten are elevated during the HSC-to-MPP transition. To study whether p-Pten is involved in regulating self-renewal and differentiation in HSCs, we compared the effects of overexpression of p-Pten and nonphosphorylated Pten (non-p-Pten) on the hematopoietic reconstitutive capacity (HRC) of HSCs. We found that overexpression of non-p-Pten enhances the LT-HRC of HSCs, whereas overexpression of p-Pten promotes myeloid differentiation and compromises the LT-HRC of HSCs. Such phosphorylation-regulated Pten functioning is mediated by repressing the cell:cell contact-induced activation of Fak/p38 signaling independent of Pten's lipid phosphatase activity because both p-Pten and non-p-Pten have comparable activity in repressing PI3K/Akt signaling. Our studies suggest that, in addition to repressing PI3K/Akt/mTor signaling, non-p-Pten maintains HSCs in bone marrow niches via a cell-contact inhibitory mechanism by inhibiting Fak/p38 signaling-mediated proliferation and differentiation. In contrast, p-Pten promotes the proliferation and differentiation of HSCs by enhancing the cell contact-dependent activation of Src/Fak/p38 signaling. Stem Cells 2016;34:2130-2144.
Collapse
Affiliation(s)
- Jing Li
- Department of Biology, College of Life and Environment Science, Shanghai Normal University, Shanghai, People's Republic of China.,Oncology Institute, Cardinal Bernardin Cancer Center, Loyola University Chicago, Chicago, Illinois, USA
| | - Jun Zhang
- Department of Biology, College of Life and Environment Science, Shanghai Normal University, Shanghai, People's Republic of China.,Oncology Institute, Cardinal Bernardin Cancer Center, Loyola University Chicago, Chicago, Illinois, USA
| | - Minghui Tang
- Oncology Institute, Cardinal Bernardin Cancer Center, Loyola University Chicago, Chicago, Illinois, USA
| | - Junping Xin
- Oncology Institute, Cardinal Bernardin Cancer Center, Loyola University Chicago, Chicago, Illinois, USA
| | - Yan Xu
- Department of Biology, College of Life and Environment Science, Shanghai Normal University, Shanghai, People's Republic of China
| | - Andrew Volk
- Oncology Institute, Cardinal Bernardin Cancer Center, Loyola University Chicago, Chicago, Illinois, USA
| | - Caiqin Hao
- Department of Biology, College of Life and Environment Science, Shanghai Normal University, Shanghai, People's Republic of China
| | - Chenglong Hu
- Department of Biology, College of Life and Environment Science, Shanghai Normal University, Shanghai, People's Republic of China
| | - Jiewen Sun
- Department of Biology, College of Life and Environment Science, Shanghai Normal University, Shanghai, People's Republic of China
| | - Wei Wei
- Oncology Institute, Cardinal Bernardin Cancer Center, Loyola University Chicago, Chicago, Illinois, USA
| | - Quichan Cao
- Department of Public Health Sciences, Loyola University Chicago, Chicago, Illinois, USA
| | - Peter Breslin
- Department of Biology, Loyola University Chicago, Chicago, Illinois, USA.,Oncology Institute, Cardinal Bernardin Cancer Center, Loyola University Chicago, Chicago, Illinois, USA.,Department of Molecular and Cellular Physiology, Loyola University Chicago, Chicago, Illinois, USA
| | - Jiwang Zhang
- Oncology Institute, Cardinal Bernardin Cancer Center, Loyola University Chicago, Chicago, Illinois, USA.,Department of Pathology, Loyola University Medical Center, Maywood, Illinois, USA
| |
Collapse
|
4
|
ZHENG JUNFANG, DAI YUANPING, YANG ZHIYU, YANG LONGYAN, PENG ZHIQIANG, MENG RAN, XIONG YING, HE JUNQI. Ezrin-radixin-moesin-binding phosphoprotein-50 regulates EGF-induced AKT activation through interaction with EGFR and PTEN. Oncol Rep 2015; 35:530-7. [DOI: 10.3892/or.2015.4375] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Accepted: 09/04/2015] [Indexed: 11/06/2022] Open
|