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Could SP-A and SP-D Serum Levels Predict COVID-19 Severity?
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Journal Article
Could SP-A and SP-D Serum Levels Predict COVID-19 Severity?
2024
Overview
Given the various clinical manifestations that characterize Coronavirus Disease 2019 (COVID-19), the scientific community is constantly searching for biomarkers with prognostic value. Surfactant proteins A (SP-A) and D (SP-D) are collectins that play a crucial role in ensuring proper alveolar function and an alteration of their serum levels was reported in several pulmonary diseases characterized by Acute Respiratory Distress Syndrome (ARDS) and pulmonary fibrosis. Considering that such clinical manifestations can also occur during Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) infection, we wondered if these collectins could act as prognostic markers. In this regard, serum levels of SP-A and SP-D were measured by enzyme immunoassay in patients with SARS-CoV-2 infection (n = 51) at admission (T0) and after seven days (T1) and compared with healthy donors (n = 11). SP-D increased in COVID-19 patients compared to healthy controls during the early phases of infection, while a significant reduction was observed at T1. Stratifying SARS-CoV-2 patients according to disease severity, increased serum SP-D levels were observed in severe compared to mild patients. In light of these results, SP-D, but not SP-A, seems to be an eligible marker of COVID-19 pneumonia, and the early detection of SP-D serum levels could be crucial for preventive clinical management.
Publisher
MDPI AG,MDPI
Subject
Acute respiratory distress syndrome
/ Adult
/ Aged
/ Continuous positive airway pressure
/ Female
/ Humans
/ Male
/ Proteins
/ Pulmonary Surfactant-Associated Protein A - blood
/ Pulmonary Surfactant-Associated Protein D - blood
/ SARS-CoV-2 - isolation & purification
/ Severe acute respiratory syndrome
