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Mechanical model of steady-state and inflammatory conditions in patients with relapsing polychondritis

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Abstract Relapsing polychondritis (RP) is a multisystem inflammatory disorder, considered to associate with immune aberration. Increased T helper type-1 cell-related cytokines were reported in RP patients. mRNA expressions of a… Click to show full abstract

Abstract Relapsing polychondritis (RP) is a multisystem inflammatory disorder, considered to associate with immune aberration. Increased T helper type-1 cell-related cytokines were reported in RP patients. mRNA expressions of a regulatory T cell cytokine interleukin (IL)-10 increased, whereas pro-inflammatory cytokines IL1β and IL6 mRNA expressions decreased in freshly isolated peripheral blood mononuclear cells of RP patients compared with those in healthy individuals. Upon in vitro stimulation with mitogen, IL10 mRNA expressions decreased, and IL1β and IL6 mRNA expressions increased in RP patients. This short-time dynamic change of gene expressions from anti-inflammatory to pro-inflammatory features of immune cells may be associated with the “relapsing” disease course of patients with RP. IL1β mRNA expressions of peripheral blood mononuclear cells exhibited positive correlations with serum matrix metalloproteinase (MMP)-3 concentrations in patients with respiratory involvement. Such positive correlation was not found in those without respiratory involvement. In a metagenomic analysis, an altered composition of gut microbes was found, suggesting that microbe metabolites such as short-chain fatty acids may affect T cell responses of the patients. In this review, the relationships among RP-related inflammatory molecules were summarized. The data support a hypothesis that the immune conditions are different between steady-state and inflammation in RP patients.

Keywords: mechanical model; model steady; relapsing polychondritis; steady state; mrna expressions

Journal Title: Medicine
Year Published: 2022

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