Purpose. Obesity is a risk factor for severe coronavirus disease 2019 (COVID-19). Circulating adipokines have been associated with iflammatory burden and amplified or dysregulated immune responses. This study aimed to evaluate the discriminatory ability of adipokines to identify COVID-19 pneumonia and to assess disease severity. Methods. We conducted an observational case-control study, with a prospective design, and recruited patients with diagnosis of COVID-19 pneumonia (n = 48) and healthy controls (n = 36), who were matched by age, sex, and BMI. Leptin, adiponectin, IL-6, and TNF-a were measured by ELISA. Results. Patients with COVID-19 pneumonia had higher levels of leptin, lower adiponectin/leptin (Adpn/Lep) ratio, and higher expression of IL-6. Leptin had an acceptable discriminatory accuracy for COVID-19 pneumonia in patients with BMI >30 (AUC 0.74 [0.58,0.90]) with a cuto¡ of 7852 pg/mL and it was associated with maximum respiratory support. By contrast, Adpn/Lep had an excellent discriminatory accuracy for OVID-19 pneumonia in patients with BMI <25 (AUC 0.9 [0.74, 1.06]) with a cutoff of 2.23. Conclusion. Our data indicate that high Adpn/Lep (>2.23) in lean patients is consistent with a state of good health, which decreases in case of inflammatory states, ranging from adipose tissue dysfunction with low-grade iflammation to COVID-19 pneumonia.

Discriminatory Value of Adiponectin to Leptin Ratio for COVID-19 Pneumonia

Tonon, Federica;Di Bella, Stefano;Giudici, Fabiola;Segat, Ludovica;Koncan, Raffaella;Toffoli, Barbara;D’Agaro, Pierlanfranco;Luzzati, Roberto;Fabris, Bruno;Bernardi, Stella
2022

Abstract

Purpose. Obesity is a risk factor for severe coronavirus disease 2019 (COVID-19). Circulating adipokines have been associated with iflammatory burden and amplified or dysregulated immune responses. This study aimed to evaluate the discriminatory ability of adipokines to identify COVID-19 pneumonia and to assess disease severity. Methods. We conducted an observational case-control study, with a prospective design, and recruited patients with diagnosis of COVID-19 pneumonia (n = 48) and healthy controls (n = 36), who were matched by age, sex, and BMI. Leptin, adiponectin, IL-6, and TNF-a were measured by ELISA. Results. Patients with COVID-19 pneumonia had higher levels of leptin, lower adiponectin/leptin (Adpn/Lep) ratio, and higher expression of IL-6. Leptin had an acceptable discriminatory accuracy for COVID-19 pneumonia in patients with BMI >30 (AUC 0.74 [0.58,0.90]) with a cuto¡ of 7852 pg/mL and it was associated with maximum respiratory support. By contrast, Adpn/Lep had an excellent discriminatory accuracy for OVID-19 pneumonia in patients with BMI <25 (AUC 0.9 [0.74, 1.06]) with a cutoff of 2.23. Conclusion. Our data indicate that high Adpn/Lep (>2.23) in lean patients is consistent with a state of good health, which decreases in case of inflammatory states, ranging from adipose tissue dysfunction with low-grade iflammation to COVID-19 pneumonia.
Pubblicato
INTERNATIONAL JOURNAL OF ENDOCRINOLOGY
https://www.hindawi.com/journals/ije/2022/9908450/
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11368/3018633
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