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Tao S, Qiu X, Wang Y, Qiu R, Yu C, Sun M, Liu L, Tao Z, Zhang L, Tang D. Effect of Post-transplant Dietary Restriction on Hematopoietic Reconstitution and Maintenance of Reconstitution Capacity of Hematopoietic Stem Cells. Stem Cell Rev Rep 2024:10.1007/s12015-024-10754-y. [PMID: 38965147 DOI: 10.1007/s12015-024-10754-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/22/2024] [Indexed: 07/06/2024]
Abstract
Hematopoietic cell transplantation (HCT) is an important therapy for many hematological malignancies as well as some non-malignant diseases. Post-transplant hematopoiesis is affected by multiple factors, and the mechanisms of delayed post-transplant hematopoiesis remain poorly understood. Patients undergoing HCT often suffer from significantly reduced food intake due to complications induced by preconditioning treatments. Here, we used a dietary restriction (DR) mouse model to study the effect of post-transplant dietary reduction on hematopoiesis and hematopoietic stem cells (HSCs). We found that post-transplant DR significantly inhibited both lymphopoiesis and myelopoiesis in the primary recipient mice. However, when bone marrow cells (BMCs) from the primary recipient mice were serially transplanted into secondary and tertiary recipient mice, the HSCs derived from the primary recipient mice, which were exposed to post-transplant DR, exhibited a much higher reconstitution capacity. Transplantation experiments with purified HSCs showed that post-transplant DR greatly inhibited hematopoietic stem cell (HSC) expansion. Additionally, post-transplant DR reshaped the gut microbiotas of the recipient mice, which inhibited inflammatory responses and thus may have contributed to maintaining HSC function. Our findings may have important implications for clinical work because reduced food intake and problems with digestion and absorption are common in patients undergoing HCT.
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Affiliation(s)
- Si Tao
- Department of Oncology, The Second Affiliated Hospital of Nanchang University, Jiangxi, China
- Jiangxi Key Laboratory of Clinical and Translational Cancer Research, Department of Oncology, The Second Affiliated Hospital of Nanchang University, Jiangxi, China
| | - Xingxing Qiu
- Department of Oncology, The Second Affiliated Hospital of Nanchang University, Jiangxi, China
- Jiangxi Key Laboratory of Clinical and Translational Cancer Research, Department of Oncology, The Second Affiliated Hospital of Nanchang University, Jiangxi, China
| | - Yiting Wang
- Department of Hematology, The Second Affiliated Hospital of Nanchang University, Jiangxi, China
- Jiangxi Provincial Key Laboratory of Hematological Diseases (2024SSY06052), Department of Hematology, The Second Affiliated Hospital of Nanchang University, Min-De Road. 1, Nanchang City, 330006, Jiangxi Province, China
| | - Rongrong Qiu
- Department of Oncology, The Second Affiliated Hospital of Nanchang University, Jiangxi, China
- Jiangxi Key Laboratory of Clinical and Translational Cancer Research, Department of Oncology, The Second Affiliated Hospital of Nanchang University, Jiangxi, China
| | - Chenghui Yu
- Department of Hematology, The Second Affiliated Hospital of Nanchang University, Jiangxi, China
- Jiangxi Provincial Key Laboratory of Hematological Diseases (2024SSY06052), Department of Hematology, The Second Affiliated Hospital of Nanchang University, Min-De Road. 1, Nanchang City, 330006, Jiangxi Province, China
| | - Man Sun
- Department of Oncology, The Second Affiliated Hospital of Nanchang University, Jiangxi, China
| | - Lulu Liu
- Department of Medical Oncology, First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Zhendong Tao
- Department of Medical Laboratory Medicine, Jiangxi Province Hospital of Integrated Chinese & Western Medicine, Jiangxi, China
| | - Liu Zhang
- Intensive Care Unit, Beijing Jishuitan Hospital, Capital Medical University, Beijing, China
| | - Duozhuang Tang
- Department of Hematology, The Second Affiliated Hospital of Nanchang University, Jiangxi, China.
- Jiangxi Provincial Key Laboratory of Hematological Diseases (2024SSY06052), Department of Hematology, The Second Affiliated Hospital of Nanchang University, Min-De Road. 1, Nanchang City, 330006, Jiangxi Province, China.
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Mohamed AA, al-Ramadi BK, Fernandez-Cabezudo MJ. Interplay between Microbiota and γδ T Cells: Insights into Immune Homeostasis and Neuro-Immune Interactions. Int J Mol Sci 2024; 25:1747. [PMID: 38339023 PMCID: PMC10855551 DOI: 10.3390/ijms25031747] [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: 12/04/2023] [Revised: 01/03/2024] [Accepted: 01/04/2024] [Indexed: 02/12/2024] Open
Abstract
The gastrointestinal (GI) tract of multicellular organisms, especially mammals, harbors a symbiotic commensal microbiota with diverse microorganisms including bacteria, fungi, viruses, and other microbial and eukaryotic species. This microbiota exerts an important role on intestinal function and contributes to host health. The microbiota, while benefiting from a nourishing environment, is involved in the development, metabolism and immunity of the host, contributing to the maintenance of homeostasis in the GI tract. The immune system orchestrates the maintenance of key features of host-microbe symbiosis via a unique immunological network that populates the intestinal wall with different immune cell populations. Intestinal epithelium contains lymphocytes in the intraepithelial (IEL) space between the tight junctions and the basal membrane of the gut epithelium. IELs are mostly CD8+ T cells, with the great majority of them expressing the CD8αα homodimer, and the γδ T cell receptor (TCR) instead of the αβ TCR expressed on conventional T cells. γδ T cells play a significant role in immune surveillance and tissue maintenance. This review provides an overview of how the microbiota regulates γδ T cells and the influence of microbiota-derived metabolites on γδ T cell responses, highlighting their impact on immune homeostasis. It also discusses intestinal neuro-immune regulation and how γδ T cells possess the ability to interact with both the microbiota and brain.
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Affiliation(s)
- Alaa A. Mohamed
- Department of Biochemistry and Molecular Biology, College of Medicine and Health Sciences, United Arab Emirates University, Al-Ain P.O. Box 15551, United Arab Emirates
| | - Basel K. al-Ramadi
- Department of Medical Microbiology and Immunology, College of Medicine and Health Sciences, United Arab Emirates University, Al-Ain P.O. Box 15551, United Arab Emirates
- Zayed Center for Health Sciences, United Arab Emirates University, Al Ain P.O. Box 15551, United Arab Emirates
| | - Maria J. Fernandez-Cabezudo
- Department of Biochemistry and Molecular Biology, College of Medicine and Health Sciences, United Arab Emirates University, Al-Ain P.O. Box 15551, United Arab Emirates
- Zayed Center for Health Sciences, United Arab Emirates University, Al Ain P.O. Box 15551, United Arab Emirates
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