Previous studies in human subjects have mostly been confined to peripheral blood lymphocytes for infection. We here aimed to compare circulating and pulmonary T-cell populations derived from human immunodeficiency virus (HIV)-uninfected immunocompromised patients with pneumonia (PCP) in order to direct new therapies. Peripheral blood and bronchoalveolar lavage samples were collected from patients with and without PCP. Populations of Th1/Tc1, Th2/Tc2, Th9/Tc9, and Th17/Tc17 CD4 and CD8 T cells were quantified using multiparameter flow cytometry. No significant differences were found between PCP and non-PCP groups in circulating T cells. However, significantly higher proportions of pulmonary Th1 and Tc9 were observed in the PCP than in the non-PCP group. Interestingly, our data indicated that pulmonary Th1 was negatively correlated with disease severity, whereas pulmonary Tc9 displayed a positive correlation in PCP patients. Our findings suggest that pulmonary expansion of Th1 and Tc9 subsets may play protective and detrimental roles in PCP patients, respectively. Thus, these specific T-cell subsets in the lungs may serve as targeted immunotherapies for patients with PCP.

Download full-text PDF

Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6775264PMC
http://dx.doi.org/10.7150/ijms.34512DOI Listing

Publication Analysis

Top Keywords

circulating pulmonary
8
pulmonary t-cell
8
t-cell populations
8
immunocompromised patients
8
patients pneumonia
8
peripheral blood
8
patients pcp
8
pcp non-pcp
8
pulmonary th1
8
th1 tc9
8

Similar Publications

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!