PMID- 21223812 OWN - NLM STAT- MEDLINE DCOM- 20111115 LR - 20120621 IS - 0376-2491 (Print) IS - 0376-2491 (Linking) VI - 90 IP - 48 DP - 2010 Dec 28 TI - [Analysis of BRAF mutation and extracellular regulated protein kinases activation in nasal mucosa melanomas]. PG - 3399-402 AB - OBJECTIVE: To determine the rate of BRAF gene mutation and the expression of activated extracellular regulated protein kinases (ERK) in nasal mucosa malignant melanomas and compare the results with those in cutaneous melanomas so as to explore the difference in the pathogenesis between nasal mucosa malignant melanomas and cutaneous melanomas. METHODS: Twenty nasal mucosa melanomas samples were collected. Genomic DNA was extracted and the BRAF mutation detected by PCR (polymerase chain reaction) and direct sequencing analysis. Total protein was obtained and the activated ERK detected by Western blot. RESULTS: BRAF mutation was detected in 5% (1/20) samples of all patients. The mutation rate was much lower than that in cutaneous melanomas. And phosphorylated ERK protein was detected in 60% (12/20). And the result was almost similar to that of cutaneous melanomas. CONCLUSIONS: The high expression of activated ERK is not caused mainly by BRAF gene mutation in nasal mucosa malignant melanomas. The pathogenic pathways are different between nasal mucosa malignant melanomas and cutaneous melanomas. FAU - Li, Hou-Yong AU - Li HY AD - Department of Otorhinolaryngology, Eye & Ear Nose Throat Hospital, Fudan University, Shanghai 200031, China. lihouy2000@yahoo.com.cn FAU - Zhou, Liang AU - Zhou L FAU - Tian, Jie AU - Tian J FAU - Cong, Ning AU - Cong N LA - chi PT - English Abstract PT - Journal Article PL - China TA - Zhonghua Yi Xue Za Zhi JT - Zhonghua yi xue za zhi JID - 7511141 RN - EC 2.7.11.1 (BRAF protein, human) RN - EC 2.7.11.1 (Proto-Oncogene Proteins B-raf) RN - EC 2.7.11.24 (Extracellular Signal-Regulated MAP Kinases) SB - IM MH - Adult MH - Aged MH - DNA Mutational Analysis MH - Extracellular Signal-Regulated MAP Kinases/genetics/*metabolism MH - Female MH - Humans MH - Melanoma/genetics/*metabolism MH - Middle Aged MH - Mutation MH - Nasal Mucosa/metabolism/pathology MH - Nose Neoplasms/genetics/*metabolism MH - Phosphorylation MH - Proto-Oncogene Proteins B-raf/*genetics EDAT- 2011/01/13 06:00 MHDA- 2011/11/16 06:00 CRDT- 2011/01/13 06:00 PHST- 2011/01/13 06:00 [entrez] PHST- 2011/01/13 06:00 [pubmed] PHST- 2011/11/16 06:00 [medline] PST - ppublish SO - Zhonghua Yi Xue Za Zhi. 2010 Dec 28;90(48):3399-402.