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Age-related immune response disparities between adults and children with severe COVID-19: a case-control study in
Hongliang Chen1,2, Yuan Li1, Liping Yuan1
1Department of Epidemiology, School of Public Health, Southern Medical University, Guangzhou, China.
Insights
COVID-19 immune responses differ significantly between adults and children. Adults showed lymphocyte exhaustion and a cytokine storm, while children exhibited systemic immune responses, informing targeted interventions.
Area of Science:
- Immunology
- Virology
- Pediatrics
Background:
- Understanding immune response variations in COVID-19 is crucial for effective treatment strategies.
- Differences in immune responses between pediatric and adult populations with COVID-19 remain incompletely understood.
Purpose of the Study:
- To investigate and compare the immune profiles of adult and pediatric patients diagnosed with COVID-19.
- To identify key differences in serum biochemical markers and cytokine levels between these age groups.
Main Methods:
- Retrospective case-control study analyzing serum biochemical markers and cytokine profiles.
- Propensity score matching (PSM) was employed to control for confounding variables.
- Data collected from adult and child COVID-19 patients at the First People's Hospital of Chenzhou.
Main Results:
- Severe adult COVID-19 patients exhibited lymphocyte exhaustion, elevated neutrophil-to-lymphocyte (NEU/LYM) ratio, high C-reactive protein (CRP), and a pronounced cytokine storm.
- The cytokine storm in adults was characterized by elevated Th1 proinflammatory cytokines: interleukin 1β (IL-1β), IL-6, IL-8, interferon type I (IFN-γ), and tumor necrosis factor (TNF-α).
- Children with COVID-19 presented with distinct systemic immune responses compared to adults.
Conclusions:
- Significant disparities in immune responses exist between adult and pediatric COVID-19 cases.
- These immune differences suggest distinct underlying mechanisms of disease progression in adults and children.
- Identifying these differences is vital for developing age-specific therapeutic interventions for COVID-19.
Background:
Elucidation of immune response differences is critical for uncovering underlying mechanisms and developing potential intervention measures among adults and children with COVID-19.
Methods:
In this retrospective study, we analyzed serum biochemical markers and cytokine profiles among adults and children with COVID-19 in the First People's Hospital of Chenzhou in Hunan, China from 1 December 2022 to 13 February 2023. A case-control study was conducted using propensity score matching (PSM) to mitigate possible confounding factors.
Results:
The significant differences observed included lymphocyte exhaustion, an increased neutrophil-to-lymphocyte (NEU/LYM) ratio, high levels of C-reactive protein (CRP), and a cytokine storm, characterized by high levels of Th1 proinflammatory cytokines, including interleukin 1β (IL-1β), IL-6, IL-8, interferon type I (IFN-γ), and tumor necrosis factor (TNF-α) in the lung among severe adult COVID-19 patients. Additionally, systemic immune responses were observed in children with COVID-19.
Conclusion:
Significant differences in immune responses between adults and children with COVID-19 highlight the different mechanisms and potential intervention measures of COVID-19.
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