PMID- 24156086 OWN - NLM STAT- PubMed-not-MEDLINE DCOM- 20131024 LR - 20211021 IS - 2193-1801 (Print) IS - 2193-1801 (Electronic) IS - 2193-1801 (Linking) VI - 2 DP - 2013 TI - Status of the anaplastic lymphoma kinase (ALK) gene in inflammatory breast carcinoma. PG - 409 LID - 10.1186/2193-1801-2-409 [doi] LID - 409 AB - BACKGROUND: Although preliminary reports suggest that ALK gene amplification may occur in inflammatory breast cancer (IBC), data are limited. We performed a comprehensive investigation of the status of ALK gene in IBC. METHODS: We used core biopsy (CB) samples from 30 IBC patients for immunohistochemistry (IHC), 25 of these samples for fluorescence in situ hybridization (FISH) of ALK gene rearrangement, 8 for chromosome 2 aneusomy, and 20 microdissected frozen CBs for array comparative genomic hybridization (CGH) and mRNA analysis. RESULTS: All 30 samples were negative for ALK protein expression by IHC. FISH analysis showed no EML4-ALK gene rearrangement in any samples, although 16 of the 25 samples (64%) contained 3 to 4 extra copies of the ALK gene, and chromosome 2 aneusomy was found in 7 of 8 samples that had extra copies of the ALK gene. Only 3 of the 20 samples showed evidence of mild ALK gene amplification by array CGH. mRNA analysis revealed that mRNA expression of ALK was not significantly higher in these samples compared with samples that showed no evidence of ALK gene amplification in CGH analysis, nor was mRNA expression of ALK significantly different in tumor compared with 5 normal breast samples (P > 0.05, t test). CONCLUSION: Our comprehensive evaluation suggests that ALK gene rearrangement did not occur in the IBC patients studied. The significance of our finding of mildly increased copy numbers of the ALK gene resulting from chromosome 2 aneusomy rather than mild amplification of the ALK gene requires further investigation. FAU - Krishnamurthy, Savitri AU - Krishnamurthy S AD - Department of Pathology, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd., Unit 53, Houston, TX 77030 USA. FAU - Woodward, Wendy AU - Woodward W FAU - Yang, Wei AU - Yang W FAU - Reuben, James M AU - Reuben JM FAU - Tepperberg, James AU - Tepperberg J FAU - Ogura, Dai AU - Ogura D FAU - Niwa, Shin-Ichiro AU - Niwa S FAU - Huo, Lei AU - Huo L FAU - Gong, Yun AU - Gong Y FAU - El-Zein, Randa AU - El-Zein R FAU - Gonzalez-Angulo, Ana M AU - Gonzalez-Angulo AM FAU - Chavez-Macgregor, Mariana AU - Chavez-Macgregor M FAU - Alvarez, Ricardo AU - Alvarez R FAU - Lucci, Anthony AU - Lucci A FAU - Valero, Vicente AU - Valero V FAU - Ueno, Naoto T AU - Ueno NT LA - eng PT - Journal Article DEP - 20130828 PL - Switzerland TA - Springerplus JT - SpringerPlus JID - 101597967 PMC - PMC3797914 EDAT- 2013/10/25 06:00 MHDA- 2013/10/25 06:01 PMCR- 2013/08/28 CRDT- 2013/10/25 06:00 PHST- 2013/08/21 00:00 [received] PHST- 2013/08/23 00:00 [accepted] PHST- 2013/10/25 06:00 [entrez] PHST- 2013/10/25 06:00 [pubmed] PHST- 2013/10/25 06:01 [medline] PHST- 2013/08/28 00:00 [pmc-release] AID - 583 [pii] AID - 10.1186/2193-1801-2-409 [doi] PST - epublish SO - Springerplus. 2013 Aug 28;2:409. doi: 10.1186/2193-1801-2-409. eCollection 2013.