1
|
Shu X, Xie Y, Shu M, Ou X, Yang J, Wu Z, Zhang X, Zhang J, Zeng H, Shao L. Acute effects of TLR3 agonist Poly(I:C) on bone marrow hematopoietic progenitor cells in mice. Immunol Lett 2024; 270:106927. [PMID: 39265918 DOI: 10.1016/j.imlet.2024.106927] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Revised: 08/20/2024] [Accepted: 09/09/2024] [Indexed: 09/14/2024]
Abstract
Hematopoietic progenitor cells (HPCs) in bone marrow with limited abilities for self-renewal and differentiation continuously supply hematopoietic cells through life. When suffering infection or inflammation, HPCs will actively proliferate to provide differentiated hematopoietic cells to maintain hematopoietic homeostasis. Poly(I:C), an agonist of TLR3, can specifically activate Type I interferon (IFN-I) signaling which exerts anti-inflammatory effects and influence hematopoiesis after infection. However, the effects of Poly(I:C)-induced IFN-I on the bone marrow hematopoietic system still deserve attention. In this study, our results revealed the efficacy of the IFN-I model, with a remarkably decrease in HPCs and a sharp elevation in LSKs numbers after single dose of Poly(I:C) injection. Apoptotic ratios of HPCs and LSKs significantly increased 48 h after Poly(I:C) treatment. Application of Poly(I:C) prompted the transition of HPCs and LSKs from G0 to G1 phases, potentially leading to the accelerated exhaustion of HPCs. From the cobblestone area-forming cell (CAFC) assay, we speculate that Poly(I:C) impairs the differentiation capacity of HPCs as well as their colony-forming ability. RT-qPCR and immunohistochemistry revealed significant upregulation of IFN-I associated genes and proteins following Poly(I:C) treatment. In conclusion, a single dose of Poly(I:C) induced an acute detrimental effect on HPCs within 48 h potentially due to TLR3 engagement. This activation cascaded into a robust IFN-I response emanating from the bone marrow, underscoring the intricate immunological dynamics at play following Poly(I:C) intervention.
Collapse
Affiliation(s)
- Xin Shu
- Jiangxi Provincial Key Laboratory of Disease Prevention and Public Health, Nanchang University, China; School of Public Health, Jiangxi Medical College, Nanchang University, China
| | - Yuxuan Xie
- Jiangxi Provincial Key Laboratory of Disease Prevention and Public Health, Nanchang University, China; School of Public Health, Jiangxi Medical College, Nanchang University, China
| | - Manling Shu
- Jiangxi Provincial Key Laboratory of Disease Prevention and Public Health, Nanchang University, China; School of Public Health, Jiangxi Medical College, Nanchang University, China
| | - Xiangying Ou
- Jiangxi Provincial Key Laboratory of Disease Prevention and Public Health, Nanchang University, China; School of Public Health, Jiangxi Medical College, Nanchang University, China
| | - Juan Yang
- Jiangxi Provincial Key Laboratory of Disease Prevention and Public Health, Nanchang University, China; School of Public Health, Jiangxi Medical College, Nanchang University, China
| | - Zhenyu Wu
- Jiangxi Provincial Key Laboratory of Disease Prevention and Public Health, Nanchang University, China; School of Public Health, Jiangxi Medical College, Nanchang University, China
| | - Xuan Zhang
- Jiangxi Provincial Key Laboratory of Disease Prevention and Public Health, Nanchang University, China; School of Public Health, Jiangxi Medical College, Nanchang University, China
| | - Jinfu Zhang
- Jiangxi Provincial Key Laboratory of Disease Prevention and Public Health, Nanchang University, China; School of Public Health, Jiangxi Medical College, Nanchang University, China
| | - Huihong Zeng
- Department of Histology and Embryology, School of Basic Medical Sciences, Jiangxi Medical College, Nanchang University, China; Basic Medical Experiment Center, School of Basic Medical Sciences, Jiangxi Medical College, Nanchang University, Nanchang, Jiangxi Province, 330006, China.
| | - Lijian Shao
- Jiangxi Provincial Key Laboratory of Disease Prevention and Public Health, Nanchang University, China; School of Public Health, Jiangxi Medical College, Nanchang University, China.
| |
Collapse
|
2
|
Wallbank BA, Pardy RD, Brodsky IE, Hunter CA, Striepen B. Cryptosporidium impacts epithelial turnover and is resistant to induced death of the host cell. mBio 2024; 15:e0172024. [PMID: 38995074 PMCID: PMC11323733 DOI: 10.1128/mbio.01720-24] [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: 06/10/2024] [Accepted: 06/13/2024] [Indexed: 07/13/2024] Open
Abstract
Infection with the apicomplexan parasite Cryptosporidium is a leading cause of diarrheal disease. Cryptosporidiosis is of particular importance in infants and shows a strong association with malnutrition, both as a risk factor and as a consequence. Cryptosporidium invades and replicates within the small intestine epithelial cells. This is a highly dynamic tissue that is developmentally stratified along the villus axis. New cells emerge from a stem cell niche in the crypt and differentiate into mature epithelial cells while moving toward the villus tip, where they are ultimately shed. Here, we studied the impact of Cryptosporidium infection on this dynamic architecture. Tracing DNA synthesis in pulse-chase experiments in vivo, we quantified the genesis and migration of epithelial cells along the villus. We found proliferation and epithelial migration to be elevated in response to Cryptosporidium infection. Infection also resulted in significant cell loss documented by imaging and molecular assays. Consistent with these observations, single-cell RNA sequencing of infected intestines showed a gain of young and a loss of mature cells. Interestingly, enhanced epithelial cell loss was not a function of enhanced apoptosis of infected cells. To the contrary, Cryptosporidium-infected cells were less likely to be apoptotic than bystanders, and experiments in tissue culture demonstrated that infection provided enhanced resistance to chemically induced apoptosis to the host but not bystander cells. Overall, this study suggests that Cryptosporidium may modulate cell apoptosis and documents pronounced changes in tissue homeostasis due to parasite infection, which may contribute to its long-term impact on the developmental and nutritional state of children. IMPORTANCE The intestine must balance its roles in digestion and nutrient absorption with the maintenance of an effective barrier to colonization and breach by numerous potential pathogens. An important component of this balance is its constant turnover, which is modulated by a gain of cells due to proliferation and loss due to death or extrusion. Here, we report that Cryptosporidium infection changes the dynamics of this process increasing both gain and loss of enterocytes speeding up the villus elevator. This leads to a much more immature epithelium and a reduction of the number of those cells typically found toward the villus apex best equipped to take up key nutrients including carbohydrates and lipids. These changes in the cellular architecture and physiology of the small intestine may be linked to the profound association between cryptosporidiosis and malnutrition.
Collapse
Affiliation(s)
- Bethan A. Wallbank
- Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Ryan D. Pardy
- Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Igor E. Brodsky
- Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Christopher A. Hunter
- Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Boris Striepen
- Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| |
Collapse
|
3
|
Yue M, Shao L, Cheng J, Fan Y, Cai X, Li H, Li M, Zhang X, Fu A, Huang Y, Nie C, Long F, Chen H, Zhu Q, Zeng H. Prostaglandin E2 accelerated recovery of chemotherapy-induced intestinal damage by increasing expression of cyclin D. Exp Cell Res 2020; 388:111819. [PMID: 31917964 DOI: 10.1016/j.yexcr.2020.111819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2019] [Revised: 12/14/2019] [Accepted: 01/03/2020] [Indexed: 11/26/2022]
Abstract
Intestinal stem cells (ISCs) play a crucial role in maintaining intestinal homeostasis upon chemotherapy and radiotherapy. It has been documented that prostaglandin E2 (PGE2) treatment improved hematopoietic stem cell function in vitro and in vivo, while the relationship between PGE2 and intestinal stem cells remains unclear. Presently, mice were exposed to PGE1, dmPGE2 and indomethacin. Numbers and function of ISCs were assessed by analyzing Olfm4+ ISCs. Intestinal protection of dmPGE2 was investigated on a 5-fluorouracil (5FU)-induced intestinal damage mouse model. The results showed that dmPGE2 treatment, but not PGE1, increased numbers of Olfm4+ ISCs in dose- and time-dependent manners. Indomethacin treatment decreased numbers of Olfm4+ ISCs. The beneficial effects of short-term dmPGE2 treatment on intestine were supported in a 5FU-induced intestinal damage model. Our data showed that 5FU treatment significantly decreased numbers of Olfm4+ ISCs and goblet cells in intestine, which could be ameliorated by dmPGE2 treatment. dmPGE2 treatment accelerated the recovery of 5FU-induced ISC injury via increasing expression of cyclin D1 and D2 in intestine. Furthermore, dmPGE2 treatment-induced expression of cyclin D1 and D2 might be mediated by up-regulation of FOXM1 expression in intestine. These findings feature PGE2 as an effective protector against chemotherapy-induced intestinal damage.
Collapse
Affiliation(s)
- Mengzhen Yue
- Medical School of Nanchang University, Nanchang, 330006, China
| | - Lijian Shao
- Medical School of Nanchang University, Nanchang, 330006, China; Jiangxi Provincial Key Laboratory of Preventive Medicine, Nanchang University, Nanchang, 330006, China
| | - Jiaoqi Cheng
- Medical School of Nanchang University, Nanchang, 330006, China
| | - Ying Fan
- Medical School of Nanchang University, Nanchang, 330006, China; Jiangxi Provincial Key Laboratory of Preventive Medicine, Nanchang University, Nanchang, 330006, China
| | - Xueqin Cai
- Medical School of Nanchang University, Nanchang, 330006, China
| | - Huan Li
- Medical School of Nanchang University, Nanchang, 330006, China
| | - Manjun Li
- The Second Affiliated Hospital of Nanchang University, Nanchang, 330006, China
| | - Xinxin Zhang
- The Second Affiliated Hospital of Nanchang University, Nanchang, 330006, China
| | - Aixiang Fu
- Medical School of Nanchang University, Nanchang, 330006, China
| | - Yanqiu Huang
- The First Affiliated Hospital of Nanchang University, Nanchang, 330006, China
| | - Chengtao Nie
- Medical School of Nanchang University, Nanchang, 330006, China
| | - Fei Long
- Medical School of Nanchang University, Nanchang, 330006, China
| | - Hongping Chen
- Medical School of Nanchang University, Nanchang, 330006, China
| | - Qingxian Zhu
- Medical School of Nanchang University, Nanchang, 330006, China
| | - Huihong Zeng
- Medical School of Nanchang University, Nanchang, 330006, China.
| |
Collapse
|