Monocytes from Cystic Fibrosis Patients and Their Immune Response
Author Information
Author(s): del Fresno Carlos, Gómez-Piña Vanesa, Lores Vanesa, Soares-Schanoski Alessandra, Fernández-Ruiz Irene, Rojo Blas, Alvarez-Sala Rodolfo, Caballero-Garrido Ernesto, García Felipe, Veliz Tania, Arnalich Francisco, Fuentes-Prior Pablo, García-Río Francisco, López-Collazo Eduardo
Primary Institution: Research Unit, ‘La Paz’ Hospital, Madrid, Spain
Hypothesis
The high frequency of infection observed in CF patients is at least partly the consequence of deregulated innate immune responses.
Conclusion
Cystic fibrosis patients' monocytes are locked in an endotoxin tolerance state due to down-regulation of TREM-1 expression.
Supporting Evidence
- CF monocytes showed significantly lower levels of TNFα and IL-6 after LPS stimulation compared to healthy controls.
- TREM-1 expression was down-regulated in CF monocytes, which did not respond to LPS challenge.
- PU.1 levels were significantly higher in CF monocytes, suggesting a role in TREM-1 down-regulation.
- Normal levels of TLR4 and MD2 were found in CF monocytes, indicating that LPS recognition was not impaired.
Takeaway
People with cystic fibrosis have trouble fighting infections because their immune cells don't respond well to germs.
Methodology
Monocytes from CF patients and healthy controls were isolated and stimulated with LPS to analyze cytokine production and TREM-1 expression.
Potential Biases
Potential bias in patient selection and the influence of concurrent infections.
Limitations
The study focused on a limited number of patients and may not represent all CF patients.
Participant Demographics
20 non-smoker adults diagnosed with cystic fibrosis, aged 30±10 years.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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