Why the study?
The dysregulation of adiponectin in lower respiratory tract infection remains controversial despite its recognized role in regulating inflammation in metabolic disease.
Serum adiponectin and PBMC AdipoR1 mRNA levels are elevated in patients with lower respiratory tract infections and correlate with disease onset and severity.
Answers are grounded in this paper and cite their sources.
APN/AdipoR associations in LRTI are hypothesis-generating; leaves open biomarker or therapeutic roles pending prospective validation.
Objective The role of adiponectin (APN) in regulating inflammation is well recognized in metabolic disease, but the dysregulation of APN in lower respiratory tract infection (LRTI) remains controversial. We aimed to measure APN and its signaling receptors, adiponectin receptor (AdipoR), in peripheral blood mononuclear cells (PBMCs) from LRTI patients to explore their potential roles in the LRTI process. Methods A total of 99 LRTI patients from the Second Xiangya Hospital of Central South University were categorized into acute (n=35) and non-acute (n=64), and non-severe (n=62) and severe (n=37) groups. Serum APN was quantified using ELISA, and mRNA levels of PBMC AdipoRs were determined by RT-qPCR. Results Both levels of APN in circulation and AdipoR1 mRNA were significantly elevated in the LRTI patients ( P =2.61E-04; P =2.49E-08), while no statistical difference was observed for AdipoR2. APN levels were increased in the non-acute group compared to the acute group ( P =6.06E-04) and AdipoR1 levels were higher in the severe group ( P =0.004). Increased APN and AdipoR1 mRNA levels were positively associated with LRTI even after adjustment for sex, age, BMI and blood lipids (OR=1.10; 95% CI 1.04-1.18; P =9.61E-04; OR=2.69; 95% CI 1.29-5.58; P =0.008). Subgroup analyses based on sex, age, and BMI revealed APN elevation in males, ≥65-year-olds, and overweight individuals, with higher AdipoR2 mRNA in females and those under 65; AdipoR1 was uniformly elevated. Additionally, APN was negatively correlated with lymphocyte count in acute and severe subgroup; AdipoR1 was positively correlated with indicators of inflammation in LRTI group. Conclusion Our study highlights that serum APN and AdipoR1 mRNA in PBMCs are associated with LRTI. Circulating APN and PBMC AdipoR1 have different significances in LRTI acute onset and severity.
No takes yet. Share an insight, caveat, or question.
Wang et al. (2025) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: