A mixed cell culture model for assessment of proliferation in tonsillar tissues from children with obstructive sleep apnea or recurrent tonsillitis
Article first published online: 5 MAR 2009
Copyright © 2009 The American Laryngological, Rhinological, and Otological Society, Inc.
Volume 119, Issue 5, pages 1005–1010, May 2009
How to Cite
Serpero, L. D., Kheirandish-Gozal, L., Dayyat, E., Goldman, J. L., Kim, J. and Gozal, D. (2009), A mixed cell culture model for assessment of proliferation in tonsillar tissues from children with obstructive sleep apnea or recurrent tonsillitis. The Laryngoscope, 119: 1005–1010. doi: 10.1002/lary.20147
- Issue published online: 20 APR 2009
- Article first published online: 5 MAR 2009
- Manuscript Accepted: 1 OCT 2008
- National Institutes of Health grants. Grant Numbers: HL-065270, HL-086662, HL-083075
- Commonwealth of Kentucky Research Challenge for Excellence Trust Fund, and the Children's Foundation Endowment for Sleep Research
- investigator initiated grant from Merck Company
- Obstructive sleep apnea;
- recurrent tonsillitis;
- tonsillar hypertrophy;
Recurrent infective tonsillitis (RI) and obstructive sleep apnea (OSA) are the major indications for adenotonsillectomy (T&A) in children. However, little is known on the determinants of lymphadenoid tissue proliferation in the pediatric upper airway.
To develop an in vitro culture system allowing for assessment of tonsillar or adenoidal proliferation under basal or stimulated conditions.
Tonsils surgically removed from pediatric patients with obstructive sleep apnea and recurrent tonsillitis during T&A, were dissociated using standard methods. Whole cell tonsillar cultures were either maintained in normal medium or stimulated with lipopolysaccharide (25 μg/mL) and concanavalin A (10 μg/mL) for 24 hours (stimulated conditions [STIM]). Cellular proliferation was evaluated by [3H]thymidine incorporation. In parallel, supernatants were collected after 48 hours, and concentration of cytokines was measured using standard enzyme-linked immunosorbent assay procedures.
Basal proliferative rates were increased in the OSA group (305.2 ± 40.6 cpm; n = 31) compared to RI group (232.8 ± 31.9 cpm; n = 26; P < .001). No significant differences in proliferative rates emerged after STIM between OSA and RI. Furthermore, basal TNF-alpha, IL-6, and IL-8 concentrations in the supernatant were increased in OSA-derived cultures compared to RI, but IL-8 was higher after STIM in RI, while IL-6 remained increased in OSA.
The proliferative rates and concentrations of inflammatory mediators in tonsillar cell cultures from children with OSA and RI suggest that lymphadenoid tissue proliferation in these two conditions may be regulated by different mechanisms. This novel method may allow for future development of specific therapeutic interventions aimed at curtailing and reversing tonsillar and adenoidal hypertrophy in children in a disease-specific manner. Laryngoscope, 2009