Stress-Inflammation Dysregulation and Biomarker Dynamics in Pediatric Mycoplasma Pneumoniae Pneumonia
Wen He1, Chongyu Xu2, Yuanyuan Huang3
1Department of Pediatrics, The Second Affiliated Hospital of Anhui Medical University; Department of Pediatric Respiratory Disease, Anhui Provincial Children's Hospital.
Insights
Psychological stress and inflammation are linked in pediatric Mycoplasma pneumoniae pneumonia (MPP). Elevated LDH and D-dimer may signal severe illness and prolonged hospitalization in children with MPP.
Area of Science:
- Pediatric infectious diseases
- Psychoneuroimmunology
- Biomarker research
Background:
- Mycoplasma pneumoniae pneumonia (MPP) is a common pediatric illness.
- MPP often involves systemic inflammation and psychological stress.
- The bidirectional relationship between stress and inflammation in MPP is not well understood.
Purpose of the Study:
- To investigate the relationship between psychological stress and inflammatory markers in hospitalized children with MPP.
- To identify clinical biomarkers for predicting disease severity and complications in pediatric MPP.
Main Methods:
- Retrospective analysis of 120 hospitalized children (aged 5-12 years).
- Assessment using the Child Stress Questionnaire (CSQ), inflammatory mediators (CRP, IL-6), and clinical biomarkers (LDH, D-dimer, MP-DNA load).
Main Results:
- Elevated LDH and D-dimer correlated with higher CSQ scores and severe inflammation.
- Children with prolonged illness (>7 days) and high MP-DNA load showed significantly higher stress scores.
- LDH ≥ 450 U/L predicted extended hospitalization (OR=2.1), and ROC analysis showed high accuracy for predicting severe complications (AUC=0.89).
Conclusions:
- A bidirectional link exists between psychological stress and immune dysregulation in pediatric MPP.
- LDH and D-dimer are valuable biomarkers for early identification of high-risk children with MPP.
Abstract:
Mycoplasma pneumoniae pneumonia (MPP) is a common pediatric infection frequently accompanied by systemic inflammation and psychological stress; however, its potential bidirectional relationship remains poorly defined. We retrospectively analyzed 120 hospitalized children aged 5-12 years using the Child Stress Questionnaire (CSQ), inflammatory mediators (CRP, IL-6), and three clinical biomarkers (LDH, D-dimer, MP-DNA load). Elevated LDH and D-dimer were significantly associated with higher CSQ scores (r = 0.67, p < 0.01) and more severe inflammatory responses. Children with prolonged illness (>7 days) and high MP-DNA load had markedly higher stress scores (mean 38 vs. 25, p < 0.01). LDH ≥ 450 U/L independently predicted extended hospitalization (OR = 2.1, 95% CI: 1.2-3.7), and ROC analysis demonstrated strong discriminative power for severe complications (AUC = 0.89, 95% CI: 0.83-0.95; sensitivity = 82%, specificity = 81%). These findings support a bidirectional link between psychological stress and immune dysregulation in pediatric MPP and highlight LDH and D-dimer as practical biomarkers for early identification of high-risk children.
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