PMID- 22201277 OWN - NLM STAT- MEDLINE DCOM- 20120604 LR - 20120220 IS - 1651-2251 (Electronic) IS - 0001-6489 (Linking) VI - 132 IP - 3 DP - 2012 Mar TI - Biological and clinical significance of p75NTR expression in laryngeal squamous epithelia and laryngocarcinoma. PG - 314-24 LID - 10.3109/00016489.2011.639086 [doi] AB - CONCLUSION: The apparent features of p75 neurotrophin receptor (p75(NTR)) expression indicated that p75(NTR) would serve as a potential stem cell marker for normal human laryngeal squamous epithelia. In human laryngeal squamous cell carcinoma (LSCC) p75(NTR) is differentially expressed. The abnormal expression and distribution of p75(NTR) may indicate malignant transformation. OBJECTIVE: To investigate the expression of p75(NTR) and its possible roles in normal laryngeal squamous epithelia and LSCC. METHODS: We used immunohistochemistry methods to examine normal laryngeal epithelia, para-cancer mucosa with dysplasia, laryngeal papilloma, and LSCC specimens for the expression of p75(NTR), nerve growth factor (NGF), -tyrosine kinase receptor (TrkA), p63, and Ki67. Immunocytochemistry and flow cytometry were used to examine the expression of p75(NTR) in Hep-2 cells. RESULTS: The expression of p75(NTR) was only located in basal cells of normal laryngeal epithelia, consistent with the staining features of epithelial stem cells as evidenced by parallel staining of p63, a putative keratinocyte stem cell marker. p75(NTR) is differentially expressed in LSCC, although no significant relationship was found with many clinicopathologic factors, this expression and distribution may correlate to malignant transformation and tumor proliferation. Co-expression of p75(NTR) and CD133 was confirmed, showing the association of p75(NTR)-positive cells with cancer stem cells in Hep-2 cells. FAU - Li, Xiaoming AU - Li X AD - Department of Otorhinolaryngology Head and Neck Surgery, Center for Otorhinolaryngological Diseases, Shijiazhuang, China. xmlmo@126.com FAU - Shen, Yupeng AU - Shen Y FAU - Di, Bin AU - Di B FAU - Li, Jun AU - Li J FAU - Geng, Jiangqiao AU - Geng J FAU - Lu, Xiuying AU - Lu X FAU - He, Zhanguo AU - He Z LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20111227 PL - England TA - Acta Otolaryngol JT - Acta oto-laryngologica JID - 0370354 RN - 0 (Receptor, Nerve Growth Factor) RN - EC 2.7.10.1 (Protein-Tyrosine Kinases) SB - IM MH - Carcinoma, Squamous Cell/*metabolism/pathology MH - Cells, Cultured MH - Flow Cytometry MH - Hep G2 Cells MH - Humans MH - Immunohistochemistry MH - Laryngeal Mucosa/*metabolism/pathology MH - Laryngeal Neoplasms/*metabolism/pathology MH - Neoplastic Stem Cells/metabolism MH - Papilloma/metabolism MH - Precancerous Conditions/*metabolism/pathology MH - Protein-Tyrosine Kinases/metabolism MH - Receptor, Nerve Growth Factor/*metabolism EDAT- 2011/12/29 06:00 MHDA- 2012/06/05 06:00 CRDT- 2011/12/29 06:00 PHST- 2011/12/29 06:00 [entrez] PHST- 2011/12/29 06:00 [pubmed] PHST- 2012/06/05 06:00 [medline] AID - 10.3109/00016489.2011.639086 [doi] PST - ppublish SO - Acta Otolaryngol. 2012 Mar;132(3):314-24. doi: 10.3109/00016489.2011.639086. Epub 2011 Dec 27.