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Xiao L, Zhang L, Guo C, Xin Q, Gu X, Jiang C, Wu J. "Find Me" and "Eat Me" signals: tools to drive phagocytic processes for modulating antitumor immunity. Cancer Commun (Lond) 2024; 44:791-832. [PMID: 38923737 PMCID: PMC11260773 DOI: 10.1002/cac2.12579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 06/03/2024] [Accepted: 06/05/2024] [Indexed: 06/28/2024] Open
Abstract
Phagocytosis, a vital defense mechanism, involves the recognition and elimination of foreign substances by cells. Phagocytes, such as neutrophils and macrophages, rapidly respond to invaders; macrophages are especially important in later stages of the immune response. They detect "find me" signals to locate apoptotic cells and migrate toward them. Apoptotic cells then send "eat me" signals that are recognized by phagocytes via specific receptors. "Find me" and "eat me" signals can be strategically harnessed to modulate antitumor immunity in support of cancer therapy. These signals, such as calreticulin and phosphatidylserine, mediate potent pro-phagocytic effects, thereby promoting the engulfment of dying cells or their remnants by macrophages, neutrophils, and dendritic cells and inducing tumor cell death. This review summarizes the phagocytic "find me" and "eat me" signals, including their concepts, signaling mechanisms, involved ligands, and functions. Furthermore, we delineate the relationships between "find me" and "eat me" signaling molecules and tumors, especially the roles of these molecules in tumor initiation, progression, diagnosis, and patient prognosis. The interplay of these signals with tumor biology is elucidated, and specific approaches to modulate "find me" and "eat me" signals and enhance antitumor immunity are explored. Additionally, novel therapeutic strategies that combine "find me" and "eat me" signals to better bridge innate and adaptive immunity in the treatment of cancer patients are discussed.
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Affiliation(s)
- Lingjun Xiao
- State Key Laboratory of Pharmaceutical BiotechnologyNational Institute of Healthcare Data Science at Nanjing University, Jiangsu Key Laboratory of Molecular Medicine, Medical School, Nanjing UniversityNanjingJiangsuP. R. China
| | - Louqian Zhang
- State Key Laboratory of Pharmaceutical BiotechnologyNational Institute of Healthcare Data Science at Nanjing University, Jiangsu Key Laboratory of Molecular Medicine, Medical School, Nanjing UniversityNanjingJiangsuP. R. China
| | - Ciliang Guo
- State Key Laboratory of Pharmaceutical BiotechnologyNational Institute of Healthcare Data Science at Nanjing University, Jiangsu Key Laboratory of Molecular Medicine, Medical School, Nanjing UniversityNanjingJiangsuP. R. China
| | - Qilei Xin
- Jinan Microecological Biomedicine Shandong LaboratoryJinanShandongP. R. China
| | - Xiaosong Gu
- State Key Laboratory of Pharmaceutical BiotechnologyNational Institute of Healthcare Data Science at Nanjing University, Jiangsu Key Laboratory of Molecular Medicine, Medical School, Nanjing UniversityNanjingJiangsuP. R. China
- Jinan Microecological Biomedicine Shandong LaboratoryJinanShandongP. R. China
| | - Chunping Jiang
- State Key Laboratory of Pharmaceutical BiotechnologyNational Institute of Healthcare Data Science at Nanjing University, Jiangsu Key Laboratory of Molecular Medicine, Medical School, Nanjing UniversityNanjingJiangsuP. R. China
- Jinan Microecological Biomedicine Shandong LaboratoryJinanShandongP. R. China
| | - Junhua Wu
- State Key Laboratory of Pharmaceutical BiotechnologyNational Institute of Healthcare Data Science at Nanjing University, Jiangsu Key Laboratory of Molecular Medicine, Medical School, Nanjing UniversityNanjingJiangsuP. R. China
- Jinan Microecological Biomedicine Shandong LaboratoryJinanShandongP. R. China
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Meng Q, Zhou L, Liang H, Hu A, Zhou H, Zhou J, Zhou X, Lin H, Li X, Jiang L, Dong J. Spine‑specific downregulation of LAPTM5 expression promotes the progression and spinal metastasis of estrogen receptor‑positive breast cancer by activating glutamine‑dependent mTOR signaling. Int J Oncol 2022; 60:47. [PMID: 35294039 PMCID: PMC8923652 DOI: 10.3892/ijo.2022.5337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Accepted: 01/24/2022] [Indexed: 11/05/2022] Open
Abstract
Estrogen receptor-positive (ER+) breast cancer (BC) is a malignancy that is prone to metastasis to the spine, which is difficult to treat and often results in poor prognosis. However, the mechanism underlying the tumorigenesis and spinal metastasis of ER+ BC remains unclear. Lysosomal protein transmembrane 5 (LAPTM5) has been reported as a tumor suppressor in several types of cancer, but its role in ER+ BC has not been described. Here, by analyzing a gene sequencing dataset and ER+ BC tissues, tumor-adjacent normal tissues and spinal metastatic tissues from patients and mouse models, we found that LAPTM5 expression is negatively related to the progression and spinal metastasis of ER+ BC. Subsequently, in vitro experiments demonstrated that downregulation of LAPTM5 expression promoted the proliferation, migration, and chemoresistance of ER+ BC cells by activating glutamine-dependent mTOR signaling. A high level of CX3CL1 could inhibit LAPTM5 expression, explaining how ER+ BC metastasized to the spine. Thus, we found that LAPTM5 functions as a tumor suppressor in ER+ BC and that the CX3CL/CX3CR1/LAPTM5/glutamine axis mediates the spinal metastasis of ER+ BC. This axis may be a promising therapeutic target for ER+ BC.
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Affiliation(s)
- Qingbing Meng
- Department of Orthopaedic Surgery, Zhongshan Hospital, Fudan University, Shanghai 200032, P.R. China
| | - Lei Zhou
- Department of Orthopaedic Surgery, Zhongshan Hospital, Fudan University, Shanghai 200032, P.R. China
| | - Haifeng Liang
- Department of Orthopaedic Surgery, Zhongshan Hospital, Fudan University, Shanghai 200032, P.R. China
| | - Annan Hu
- Department of Orthopaedic Surgery, Zhongshan Hospital, Fudan University, Shanghai 200032, P.R. China
| | - Hao Zhou
- Department of Orthopedic Surgery, Xuhui‑Zhongshan Hospital, Fudan University, Shanghai 200032, P.R. China
| | - Jian Zhou
- Department of Orthopaedic Surgery, Zhongshan Hospital, Fudan University, Shanghai 200032, P.R. China
| | - Xiaogang Zhou
- Department of Orthopaedic Surgery, Zhongshan Hospital, Fudan University, Shanghai 200032, P.R. China
| | - Hong Lin
- Department of Orthopaedic Surgery, Zhongshan Hospital, Fudan University, Shanghai 200032, P.R. China
| | - Xilei Li
- Department of Orthopaedic Surgery, Zhongshan Hospital, Fudan University, Shanghai 200032, P.R. China
| | - Libo Jiang
- Department of Orthopaedic Surgery, Zhongshan Hospital, Fudan University, Shanghai 200032, P.R. China
| | - Jian Dong
- Department of Orthopaedic Surgery, Zhongshan Hospital, Fudan University, Shanghai 200032, P.R. China
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Rodenburg WS, van Buul JD. Rho GTPase signalling networks in cancer cell transendothelial migration. VASCULAR BIOLOGY 2021; 3:R77-R95. [PMID: 34738075 PMCID: PMC8558887 DOI: 10.1530/vb-21-0008] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Accepted: 09/14/2021] [Indexed: 01/21/2023]
Abstract
Rho GTPases are small signalling G-proteins that are central regulators of cytoskeleton dynamics, and thereby regulate many cellular processes, including the shape, adhesion and migration of cells. As such, Rho GTPases are also essential for the invasive behaviour of cancer cells, and thus involved in several steps of the metastatic cascade, including the extravasation of cancer cells. Extravasation, the process by which cancer cells leave the circulation by transmigrating through the endothelium that lines capillary walls, is an essential step for metastasis towards distant organs. During extravasation, Rho GTPase signalling networks not only regulate the transmigration of cancer cells but also regulate the interactions between cancer and endothelial cells and are involved in the disruption of the endothelial barrier function, ultimately allowing cancer cells to extravasate into the underlying tissue and potentially form metastases. Thus, targeting Rho GTPase signalling networks in cancer may be an effective approach to inhibit extravasation and metastasis. In this review, the complex process of cancer cell extravasation will be discussed in detail. Additionally, the roles and regulation of Rho GTPase signalling networks during cancer cell extravasation will be discussed, both from a cancer cell and endothelial cell point of view.
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Affiliation(s)
- Wessel S Rodenburg
- Molecular Cell Biology Lab at Department of Molecular Hematology, Sanquin Research and Landsteiner Laboratory, Amsterdam, the Netherlands
| | - Jaap D van Buul
- Molecular Cell Biology Lab at Department of Molecular Hematology, Sanquin Research and Landsteiner Laboratory, Amsterdam, the Netherlands.,Leeuwenhoek Centre for Advanced Microscopy, Section Molecular Cytology at Swammerdam Institute for Life Sciences at University of Amsterdam, Amsterdam, the Netherlands
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Jelgersma C, Vajkoczy P. How to Target Spinal Metastasis in Experimental Research: An Overview of Currently Used Experimental Mouse Models and Future Prospects. Int J Mol Sci 2021; 22:ijms22115420. [PMID: 34063821 PMCID: PMC8196562 DOI: 10.3390/ijms22115420] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2021] [Revised: 05/12/2021] [Accepted: 05/18/2021] [Indexed: 01/20/2023] Open
Abstract
The spine is one of the organs that is most affected by metastasis in cancer patients. Since the control of primary tumor is continuously improving, treatment of metastases is becoming one of the major challenges to prevent cancer-related death. Due to the anatomical proximity to the spinal cord, local spread of metastasis can directly cause neurological deficits, severely limiting the patient’s quality of life. To investigate the underlying mechanisms and to develop new therapies, preclinical models are required which represent the complexity of the multistep cascade of metastasis. Current research of metastasis focuses on the formation of the premetastatic niche, tumor cell dormancy and the influence and regulating function of the immune system. To unveil whether these influence the organotropism to the spine, spinal models are irreplaceable. Mouse models are one of the most suitable models in oncologic research. Therefore, this review provides an overview of currently used mouse models of spinal metastasis. Furthermore, it discusses technical aspects clarifying to what extend these models can picture key steps of the metastatic process. Finally, it addresses proposals to develop better mouse models in the future and could serve as both basis and stimulus for researchers and clinicians working in this field.
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