PMID- 15066327 OWN - NLM STAT- MEDLINE DCOM- 20040630 LR - 20220316 IS - 0165-4608 (Print) IS - 0165-4608 (Linking) VI - 150 IP - 2 DP - 2004 Apr 15 TI - Fluorescence in situ hybridization analysis of allelic losses involving the long arm of chromosome 17 in NF1-associated neurofibromas. PG - 168-72 AB - Neurofibromatosis type 1 (NF1) is a common autosomal dominant condition associated with germline mutations of the NF1 gene located at chromosome band 17q11.2. Molecular analysis of a number of NF1-specific tumors has shown the inactivation of both NF1 alleles during tumorigenesis, supporting the tumor suppressor hypothesis for the NF1 gene. Using interphase dual-color fluorescence in situ hybridization (FISH) technique on paraffin-embedded tissues, we studied 11 plexiform, 4 cutaneous, and 6 subcutaneous neurofibromas. Cytogenetic analysis was conducted using two probes, one specific for the NF1 region (RP11-229K15) and one for the centromeric region of chromosome 17 as control. No large somatic deletions were found. Only in one of the plexiform neurofibromas loss of a whole chromosome 17 was observed. If we assume that dual-color FISH analysis is sensitive enough to detect the majority of large somatic deletions present, then other mutational mechanisms affecting the NF1 gene are probably involved in neurofibroma formation, and other tumor suppressor genes may play an important role in NF1 tumorigenesis. FAU - De Luca, Alessandro AU - De Luca A AD - IRCCS-CSS, San Giovanni Rotondo and CSS-Mendel Institute, Viale Regina Margherita 261, 00198 Rome, Italy. a.deluca@css-mendel.it FAU - Bernardini, Laura AU - Bernardini L FAU - Ceccarini, Caterina AU - Ceccarini C FAU - Sinibaldi, Lorenzo AU - Sinibaldi L FAU - Novelli, Antonio AU - Novelli A FAU - Giustini, Sandra AU - Giustini S FAU - Daniele, Innocenzi AU - Daniele I FAU - Calvieri, Stefano AU - Calvieri S FAU - Mingarelli, Rita AU - Mingarelli R LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Cancer Genet Cytogenet JT - Cancer genetics and cytogenetics JID - 7909240 SB - IM MH - Adolescent MH - Adult MH - Child MH - Child, Preschool MH - Chromosome Mapping MH - *Chromosomes, Human, Pair 17/*genetics MH - Female MH - Humans MH - In Situ Hybridization, Fluorescence MH - Male MH - Middle Aged MH - Neurofibromatosis 1/*genetics MH - Sequence Deletion EDAT- 2004/04/07 05:00 MHDA- 2004/07/01 05:00 CRDT- 2004/04/07 05:00 PHST- 2003/07/29 00:00 [received] PHST- 2003/08/29 00:00 [revised] PHST- 2003/09/02 00:00 [accepted] PHST- 2004/04/07 05:00 [pubmed] PHST- 2004/07/01 05:00 [medline] PHST- 2004/04/07 05:00 [entrez] AID - S0165460803003911 [pii] AID - 10.1016/j.cancergencyto.2003.09.001 [doi] PST - ppublish SO - Cancer Genet Cytogenet. 2004 Apr 15;150(2):168-72. doi: 10.1016/j.cancergencyto.2003.09.001.