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Zhao S, Qiao Z, Pfeifer R, Pape HC, Mao K, Tang H, Meng B, Chen S, Liu H. Modulation of fracture healing by senescence-associated secretory phenotype (SASP): a narrative review of the current literature. Eur J Med Res 2024; 29:38. [PMID: 38195489 PMCID: PMC10775505 DOI: 10.1186/s40001-023-01604-7] [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: 05/07/2023] [Accepted: 12/19/2023] [Indexed: 01/11/2024] Open
Abstract
The senescence-associated secretory phenotype (SASP) is a generic term for the secretion of cytokines, such as pro-inflammatory factors and proteases. It is a crucial feature of senescent cells. SASP factors induce tissue remodeling and immune cell recruitment. Previous studies have focused on the beneficial role of SASP during embryonic development, wound healing, tissue healing in general, immunoregulation properties, and cancer. However, some recent studies have identified several negative effects of SASP on fracture healing. Senolytics is a drug that selectively eliminates senescent cells. Senolytics can inhibit the function of senescent cells and SASP, which has been found to have positive effects on a variety of aging-related diseases. At the same time, recent data suggest that removing senescent cells may promote fracture healing. Here, we reviewed the latest research progress about SASP and illustrated the inflammatory response and the influence of SASP on fracture healing. This review aims to understand the role of SASP in fracture healing, aiming to provide an important clinical prevention and treatment strategy for fracture. Clinical trials of some senolytics agents are underway and are expected to clarify the effectiveness of their targeted therapy in the clinic in the future. Meanwhile, the adverse effects of this treatment method still need further study.
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Affiliation(s)
- Shangkun Zhao
- Department of Orthopedic Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Zhi Qiao
- Department of Orthopedic Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Roman Pfeifer
- Department of Traumatology, University Hospital of Zurich, Zurich, 8091, China
| | - Hans-Christoph Pape
- Department of Traumatology, University Hospital of Zurich, Zurich, 8091, China
| | - Keya Mao
- Chinese PLA General Hospital Beijing, Beijing, 100853, China
| | - Hai Tang
- Beijing Friendship Hospital, Beijing, 100050, China
| | - Bin Meng
- First Affiliated Hospital of Soochow University, Suzhou, 215006, Jiangsu, China
| | - Songfeng Chen
- Department of Orthopedic Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Hongjian Liu
- Department of Orthopedic Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China.
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Wu S, Nie Q, Tan S, Liao G, Lv Y, Lv C, Chen G, Liu S. The immunity modulation of transforming growth factor-β in malaria and other pathological process. Int Immunopharmacol 2023; 122:110658. [PMID: 37467691 DOI: 10.1016/j.intimp.2023.110658] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2023] [Revised: 07/09/2023] [Accepted: 07/14/2023] [Indexed: 07/21/2023]
Abstract
The main causative agent of malaria in humans is Plasmodium falciparum, which is spread through biting Anopheles mosquitoes. Immunoregulation in the host involving the pleiotropic cytokine transforming growth factor-β (TGF-β) has a vital role in controlling the immune response to P. falciparum infection. Based on a search of the published literature, this study investigated the correlation between malaria and immune cells, specifically the role of TGF-β in the immune response. The studies analyzed showed that, when present in low amounts, TGF-β promotes inflammation, but inhibits inflammation when present in high concentrations; thus, it is an essential regulator of inflammation. It has also been shown that the quantity of TGF-β produced by the host can influence how badly the parasite affects the host. Low levels of TGF-β in the host prevent the host from being able to manage the inflammation that Plasmodium causes, which results in a pathological situation that leaves the host vulnerable to fatal infection. Additionally, the amount of TGF-β fluctuates throughout the host's Plasmodium infection. At the beginning of a Plasmodium infection, TGF-β levels are noticeably increased, and as Plasmodium multiplies quickly, they start to decline, hindering further growth. In addition, it is also involved in the growth, proliferation, and operation of various types of immune cell and correlated with levels of cytokines associated with the immune response to malaria. TGF-β levels were positively connected with the anti-inflammatory cytokine interleukin-10 (IL-10), but negatively correlated with the proinflammatory cytokines interferon-γ (IFN-γ) and IL-6 in individuals with severe malaria. Thus, TGF-β might balance immune-mediated pathological damage and the regulation and clearance of infectious pathogens. Numerous domestic and international studies have demonstrated that TGF-β maintains a dynamic balance between anti-inflammation and pro-inflammation in malaria immunity by acting as an anti-inflammatory factor when inflammation levels are too high and as a pro-inflammatory factor when inflammation levels are deficient. Such information could be of relevance to the design of urgently needed vaccines and medications to meet the emerging risks associated with the increasing spread of malaria and the development of drug resistance.
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Affiliation(s)
- Shuang Wu
- Department of Basic Medical Sciences, Taizhou University, No 1139 Shifu Road, Jiaojiang District, Taizhou, China
| | - Qing Nie
- Weifang Centers for Disease Control and Prevention, No 4801 Huixian Road, Gaoxin District, Shandong Province, Weifang 261061, China
| | - Shuang Tan
- Department of Basic Medical Sciences, Taizhou University, No 1139 Shifu Road, Jiaojiang District, Taizhou, China
| | - Guoyan Liao
- Department of Basic Medical Sciences, Taizhou University, No 1139 Shifu Road, Jiaojiang District, Taizhou, China
| | - Yinyi Lv
- Department of Basic Medical Sciences, Taizhou University, No 1139 Shifu Road, Jiaojiang District, Taizhou, China
| | - Caohua Lv
- Department of Dermatology, Taizhou Second People's Hospital, No 2 Shuinan East Road, Tiantai Country, Taizhou 317200, China
| | - Guang Chen
- Department of Basic Medical Sciences, Taizhou University, No 1139 Shifu Road, Jiaojiang District, Taizhou, China.
| | - Shuangchun Liu
- Municipal Hospital Affiliated to Medical School of Taizhou University, No 381, Zhongshan East Road, Jiaojiang District, Taizhou 318000, China.
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