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Changes of serum concentration of lipid peroxidation products in patients with pneumonia
1Dept of Pneumonology and Allergology, Medical University of Lódź, Poland.
Abstract:
During lower respiratory tract infection, massive influx and activation of phagocytes is observed. Reactive oxygen species (ROS) released by macrophages and polymorphonuclear neutrophils (PMNs) kill microorganisms and cause damage to host tissues. One feature of this damage may be enhanced lipid peroxidation. Therefore, the aim of this study was to estimate the serum concentration of lipid peroxidation products in combination with clinical and biochemical indicators of inflammation in 32 patients with pneumonia. Serum concentration of lipid peroxides (CLP) and malondialdehyde (CMDA) was measured at Day 1, 4, 10 and 14 of observation, whilst chest radiography and routine blood analysis were performed at Day 1 and 14 during a 2 week treatment of lower airway infection. The CLP decreased during treatment (p < 0.05) from 0.059 +/- 0.024 to 0.043 +/- 0.017 (A532 nm) and the CMDA (p < 0.05) from 3.5 +/- 1.4 to 2.8 +/- 1.3 nmol.mL-1. A negative correlation between CLP and radiological regression (r = 0.49) and a drop in white blood cell count (WBC) (r = 0.39) was observed during the treatment. A positive correlation between CMDA and serum trypsin inhibitory capacity (STIC) (r = 0.47) and erythrocyte sedimentation rate (ESR) (r = 0.43) was found. Our data indicate that an enhanced process of lipid peroxidation occurs during pneumonia and that serum concentration of lipid peroxides returns to normal values quicker than the concentration of malondialdehyde during recovery. The use of antioxidants is suggested as an adjuvant treatment in patients with pneumonia.
Insights
Pneumonia involves increased lipid peroxidation. Serum lipid peroxides and malondialdehyde levels decreased during treatment, with peroxides normalizing faster. Antioxidants may aid pneumonia recovery.
Area of Science:
- Biochemistry
- Immunology
- Pulmonology
Background:
- Lower respiratory tract infections trigger phagocyte activation and release of reactive oxygen species (ROS).
- ROS can cause host tissue damage, potentially through enhanced lipid peroxidation.
- Lipid peroxidation products may serve as indicators of disease activity and progression in pneumonia.
Purpose of the Study:
- To investigate serum concentrations of lipid peroxidation products in pneumonia patients.
- To correlate these markers with clinical and biochemical indicators of inflammation.
- To assess changes in lipid peroxidation markers during treatment and recovery.
Main Methods:
- Serum lipid peroxides (CLP) and malondialdehyde (CMDA) were measured in 32 pneumonia patients on days 1, 4, 10, and 14.
- Chest radiography and routine blood analyses (including white blood cell count, serum trypsin inhibitory capacity, and erythrocyte sedimentation rate) were performed.
- Statistical analysis was used to assess changes over time and correlations between markers.
Main Results:
- CLP and CMDA levels significantly decreased during the 2-week treatment period.
- CLP normalized more rapidly than CMDA during recovery.
- Negative correlations were observed between CLP and radiological regression/white blood cell count.
- Positive correlations were found between CMDA and serum trypsin inhibitory capacity/erythrocyte sedimentation rate.
Conclusions:
- Pneumonia is associated with an enhanced lipid peroxidation process.
- Serum lipid peroxides and malondialdehyde levels reflect disease activity and response to treatment.
- The findings suggest that antioxidant therapy could be a beneficial adjuvant treatment for pneumonia.