PMID- 11359956 OWN - NLM STAT- MEDLINE DCOM- 20010705 LR - 20190503 IS - 0040-6376 (Print) IS - 1468-3296 (Electronic) IS - 0040-6376 (Linking) VI - 56 IP - 6 DP - 2001 Jun TI - Dendritic cells in the mucosa of the human trachea are not regularly found in the first year of life. PG - 427-31 AB - BACKGROUND: Dendritic cells (DCs) in the mucosa of the respiratory tract might be involved in the early development of pulmonary allergy or tolerance. To date, little is known about when the first DCs occur in human airways. METHODS: Specimens of the distal trachea from patients who had died from sudden death in the first year of life (n=29) and in older age groups (n=59) as well as from those who had died from respiratory tract infections in the first year of life (n=8) were examined by immunohistochemistry. Transmission electron microscopy was performed in additional samples from two adults. RESULTS: In the sudden death subgroup DCs were absent in 76% of those who died in the first year of life but were present in 53 of the 59 older cases. All infants who had died of respiratory infectious diseases had DCs in the tracheal mucosa. CONCLUSIONS: Mature DCs are not constitutively present in the human tracheobronchial mucosa in the first year of life, but their occurrence seems to be triggered by infectious stimuli. These data support the hypothesis that DCs play a crucial role in immunoregulation in early childhood. FAU - Tschernig, T AU - Tschernig T AD - Department of Anatomy, Medical School of Hannover, 30623 Hannover, Germany. Tschernig.Thomas@MH-Hannover.de FAU - Debertin, A S AU - Debertin AS FAU - Paulsen, F AU - Paulsen F FAU - Kleemann, W J AU - Kleemann WJ FAU - Pabst, R AU - Pabst R LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - Thorax JT - Thorax JID - 0417353 SB - IM CIN - Thorax. 2001 Jun;56(6):419-20. PMID: 11359953 MH - Adolescent MH - Adult MH - Aged MH - Aged, 80 and over MH - Autopsy MH - Child MH - Child, Preschool MH - Death, Sudden/pathology MH - Dendritic Cells/*immunology MH - Humans MH - Immunity, Cellular MH - Immunohistochemistry/methods MH - Infant MH - Infant, Newborn MH - Middle Aged MH - Respiratory Hypersensitivity/immunology/pathology MH - Respiratory Mucosa/*immunology MH - Respiratory Tract Diseases/immunology/pathology MH - Retrospective Studies MH - Sudden Infant Death/immunology/pathology MH - Trachea/*immunology MH - Virus Diseases/immunology PMC - PMC1746069 EDAT- 2001/05/22 10:00 MHDA- 2001/07/06 10:01 PMCR- 2004/06/01 CRDT- 2001/05/22 10:00 PHST- 2001/05/22 10:00 [pubmed] PHST- 2001/07/06 10:01 [medline] PHST- 2001/05/22 10:00 [entrez] PHST- 2004/06/01 00:00 [pmc-release] AID - 10.1136/thorax.56.6.427 [doi] PST - ppublish SO - Thorax. 2001 Jun;56(6):427-31. doi: 10.1136/thorax.56.6.427.