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Liu R, Zhu J, Chen A, Fan Y, Li L, Mei Y, Wang Y, Wang X, Liu B, Liu Q. Intra-bone marrow injection with engineered Lactococcus lactis for the treatment of metastatic tumors: Primary report. Biomed Pharmacother 2024; 173:116384. [PMID: 38471270 DOI: 10.1016/j.biopha.2024.116384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 02/27/2024] [Accepted: 03/06/2024] [Indexed: 03/14/2024] Open
Abstract
Bone marrow has the capacity to produce different types of immune cells, such as natural killer cells, macrophages, dendritic cells (DCs) and T cells. Improving the activation of immune cells in the bone marrow can enhance the therapy of bone metastases. Previously, we designed an engineered probiotic Lactococcus lactis, capable of expressing a fusion protein of Fms-like tyrosine kinase 3 ligand and co-stimulator OX40 ligand (FOLactis), and proved that it can induce the activation and differentiation of several immune cells. In this research, we successfully establish mouse models of bone metastasis, lung metastasis and intraperitoneal dissemination, and we are the first to directly inject the probiotics into the bone marrow to inhibit tumor growth. We observe that injecting FOLactis into the bone marrow of mice can better regulate the immune microenvironment of tumor-bearing mice, resulting in a tumor-suppressive effect. Compared to subcutaneous (s.c.) injection, intra-bone marrow (IBM) injection is more effective in increasing mature DCs and CD8+ T cells and prolonging the survival of tumor-bearing mice. Our results confirm that IBM injection of FOLactis reprograms the immune microenvironment of bone marrow and has remarkable effectiveness in various metastatic tumor models.
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Affiliation(s)
- Rui Liu
- The Comprehensive Cancer Centre, Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, 321 Zhongshan Road, Nanjing 210008, China; The Clinical Cancer Institute of Nanjing University, Nanjing, China; The Comprehensive Cancer Centre, China Pharmaceutical University Nanjing Drum Tower Hospital, 321 Zhongshan Road, Nanjing 210008, China
| | - Junmeng Zhu
- The Comprehensive Cancer Centre, Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, 321 Zhongshan Road, Nanjing 210008, China; The Clinical Cancer Institute of Nanjing University, Nanjing, China
| | - Aoxing Chen
- The Clinical Cancer Institute of Nanjing University, Nanjing, China; Department of Oncology, Nanjing Drum Tower Hospital Clinical College of Nanjing University of Chinese Medicine, 321 Zhongshan Road, Nanjing 210008, China
| | - Yue Fan
- The Comprehensive Cancer Centre, Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, 321 Zhongshan Road, Nanjing 210008, China; The Clinical Cancer Institute of Nanjing University, Nanjing, China; The Comprehensive Cancer Centre, China Pharmaceutical University Nanjing Drum Tower Hospital, 321 Zhongshan Road, Nanjing 210008, China
| | - Lin Li
- Department of Oncology, Nanjing Drum Tower Hospital Clinical College of Nanjing University of Chinese Medicine, 321 Zhongshan Road, Nanjing 210008, China; Department of Pathology, The Affiliated Hospital of Nanjing University Medical School, 321 Zhongshan Road, Nanjing 210008, China
| | - Yi Mei
- The Comprehensive Cancer Centre, Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, 321 Zhongshan Road, Nanjing 210008, China; The Clinical Cancer Institute of Nanjing University, Nanjing, China
| | - Yan Wang
- The Comprehensive Cancer Centre, Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, 321 Zhongshan Road, Nanjing 210008, China; The Clinical Cancer Institute of Nanjing University, Nanjing, China
| | - Xiaonan Wang
- The Comprehensive Cancer Centre, Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, 321 Zhongshan Road, Nanjing 210008, China; The Clinical Cancer Institute of Nanjing University, Nanjing, China; The Comprehensive Cancer Centre, China Pharmaceutical University Nanjing Drum Tower Hospital, 321 Zhongshan Road, Nanjing 210008, China
| | - Baorui Liu
- The Comprehensive Cancer Centre, Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, 321 Zhongshan Road, Nanjing 210008, China; The Clinical Cancer Institute of Nanjing University, Nanjing, China
| | - Qin Liu
- The Comprehensive Cancer Centre, Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, 321 Zhongshan Road, Nanjing 210008, China; The Clinical Cancer Institute of Nanjing University, Nanjing, China.
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