By LabPulse.com staff writers

October 3, 2019 -- Certain small molecules involved in lung and systemic inflammatory processes show promise as affordable blood-based biomarkers for pneumonia patients at risk of life-threatening complications, according to a study presented on October 2 at the European Respiratory Society (ERS) International Congress in Madrid.

Identifying particular microRNAs -- small molecules involved in the regulation of gene expression -- using polymerase chain reaction (PCR) testing at the time patients are hospitalized with severe pneumonia could alert health professionals to risks and help prevent complications, reported Dr. Francisco Sanz, a pulmonologist at Consorci Hospital General Universitari de València, and colleagues. Testing is affordable, is readily available in hospitals, and takes from one to three hours, the researchers noted.

The study evaluated microRNAs in 169 patients who were hospitalized after acquiring pneumonia in community settings, outside of institutional environments. Most of the patients had severe pneumonia and also comorbidities, notably diabetes and chronic obstructive pulmonary disease, and their average age was 67. Complications were common, occurring in 64.5% of the patients.

Complications in patients with pneumonia
Complication Incidence rate (n = 169)
Acute hypoxemic respiratory failure 25.4%
Sepsis 13.6%
Death 3.6%

Sanz and colleagues identified three particular microRNAs associated with complications and estimated the accuracy for predicting the onset of complications. For example, they reported that microRNA182 was predictive for both sepsis and respiratory failure.

Correlation between microRNAs in blood tests and complications
microRNA Complication Accuracy of complication prediction
microRNA182 Sepsis, respiratory failure 83% for sepsis; 76% for respiratory failure
microRNA223 Sepsis 78%
microRNA574 Respiratory failure 77%

In a statement, ERS President Dr. Tobias Welte from Hannover University in Germany described the approach as innovative with the potential to save lives, but he acknowledged that its usefulness would need to be confirmed by comparison with guidelines and current best practice.

In separate news, the American Thoracic Society and the Infectious Diseases Society of America published a clinical guideline on October 1 for the treatment of adults with community-acquired pneumonia. The guideline advises that for some patients, more microscopic studies of respiratory tract samples should be performed in light of the risks of antibiotic resistance.

ATS, IDSA revamp pneumonia testing guidance
More microscopic studies of respiratory tract samples are needed in some patients with pneumonia to reduce the risk of treating drug-resistant infections,...
Why blood cultures must come first in suspected sepsis
Patients suspected of having sepsis must get blood cultures prior to antibiotic therapy, in line with national guidelines, according to a study published...
Applied BioCode files 510(k) for respiratory pathogen panel
Applied BioCode has submitted its Respiratory Pathogen Panel, which detects viruses and bacteria that cause upper respiratory infections, for 510(k) clearance...
Blood test helps gauge lung cancer risk in heavy smokers
Pairing a microRNA blood test with low-dose computed tomography scans helps assess risk for lung cancer and guide screening efforts, according to an Italian...

Copyright © 2019 LabPulse.com

Last Updated np 10/3/2019 10:11:06 AM



Register below for our weekly Letter from the Editor to receive the latest Clinical Lab news and insights.
Email