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Characteristics of T cell premature senescence in maintenance hemodialysis patients.
- Source :
-
Inflammation research : official journal of the European Histamine Research Society ... [et al.] [Inflamm Res] 2024 Aug; Vol. 73 (8), pp. 1299-1309. Date of Electronic Publication: 2024 Jun 08. - Publication Year :
- 2024
-
Abstract
- Background: Uremia-associated immunodeficiency, mainly characterized by T cell dysfunction, exists in patients on maintenance hemodialysis (MHD) and promotes systemic inflammation. However, T cell senescence, one of the causes of T cell dysfunction, has not been clearly revealed yet. In this cross-sectional research, we aimed to study the manifestation of T cell premature senescence in MHD patients and further investigate the associated clinical factors.<br />Methods: 76 MHD patients including 33 patients with cardiovascular diseases (CVD) and 28 patients with arteriovenous fistula (AVF) event history were enrolled in this study. Complementarity determining region 3 (CDR3) of T cell receptor (TCR) was analyzed by immune repertoire sequencing (IR-Seq). CD28- T cell subsets and expression of senescence marker p16 and p21 genes were detected by multicolor flow cytometry and RT-qPCR, respectively.<br />Results: MHD patients had significantly decreased TCR diversity (P < 0.001), increased CDR3 clone proliferation (P = 0.001) and a left-skewed CDR3 length distribution. The proportion of CD4 + CD28- T cells increased in MHD patients (P = 0.014) and showed a negative correlation with TCR diversity (P = 0.001). p16 but not p21 expression in T cells was up-regulated in MHD patients (P = 0.039). Patients with CVD exhibited increased expression of p16 and p21 genes (P = 0.010 and 0.004, respectively), and patients with AVF events showed further TCR diversity and evenness reduction (P = 0.002 and 0.017, respectively) compared to patients without the comorbidities. Moreover, age, average convection volume, total cholesterol, high-density lipoprotein cholesterol and transferrin saturation were associated with TCR diversity or CD4 + CD28- T cell proportion (P < 0.05).<br />Conclusions: MHD patients undergo T cell premature senescence characterized by significant TCR diversity reduction and repertoire skew, as well as accumulation of the CD4 + CD28- subset and up-regulation of p16 gene. Patients with CVD or AVF events show higher level of immunosenescence. Furthermore, T cell senescence in MHD patients is associated with blood cholesterol and uremic toxin retention, suggesting potential intervention strategies in the future.<br /> (© 2024. The Author(s), under exclusive licence to Springer Nature Switzerland AG.)
Details
- Language :
- English
- ISSN :
- 1420-908X
- Volume :
- 73
- Issue :
- 8
- Database :
- MEDLINE
- Journal :
- Inflammation research : official journal of the European Histamine Research Society ... [et al.]
- Publication Type :
- Academic Journal
- Accession number :
- 38850344
- Full Text :
- https://doi.org/10.1007/s00011-024-01897-2