PMID- 26557913 OWN - NLM STAT- PubMed-not-MEDLINE DCOM- 20151111 LR - 20181113 IS - 1759-7706 (Print) IS - 1759-7714 (Electronic) IS - 1759-7706 (Linking) VI - 6 IP - 6 DP - 2015 Nov TI - Loss of heterozygosity at the human leukocyte antigen locus in thymic epithelial tumors. PG - 749-53 LID - 10.1111/1759-7714.12252 [doi] AB - BACKGROUND: To study the relationship between loss of heterozygosity (LOH) at the human leukocyte antigen (HLA) locus and the pathogenicity and clinicopathological features of thymic epithelial tumors (TET). METHODS: Tumor and adjacent normal tissues were isolated from 36 TET patients. Five microsatellite loci (D6S1666, D6S265, D6S273, DS6276, and D6S291) within the HLA locus were amplified by polymerase chain reaction. DNA sequencing was used to measure the frequency of microsatellite LOH. RESULTS: LOH was identified in at least one locus in 83.6% of TET patients. LOH frequency at D6S1666, D6S265, D6S273, D6S276, and D6S291 was 44.4%, 16.7%, 30.5%, 38.9%, and 36.1% respectively. There was no significant association between LOH frequency in TET with tumor severity, or in the presence or absence of myasthenia gravis. CONCLUSIONS: D6S1666, D6S265, D6S273, DS6S276, and D6S29 are sensitive loci for studying microsatellite LOH in TET. LOH within the HLA complex is implicated in the occurrence and development of TET, with the HLA-DQA1 gene likely involved. However, an understanding of the relationship between LOH and the clinicopathological features of TET requires a larger sample size than that of the present study. FAU - Chen, Yuan AU - Chen Y AD - Deparment of Cardiothoracic Surgery, Tianjin Medical University General Hospital Tianjin, China. FAU - Wang, Guojin AU - Wang G AD - Deparment of Hematology and Oncology, Tianjin Medical University General Hospital Tianjin, China. FAU - Zhang, Peng AU - Zhang P AD - Deparment of Cardiothoracic Surgery, Tianjin Medical University General Hospital Tianjin, China. FAU - Liu, Yimei AU - Liu Y AD - Deparment of Cardiothoracic Surgery, Tianjin Medical University General Hospital Tianjin, China. FAU - Yao, Yuanyuan AU - Yao Y AD - Deparment of Cardiothoracic Surgery, Tianjin Medical University General Hospital Tianjin, China. FAU - Wang, Hai AU - Wang H AD - Deparment of Cardiothoracic Surgery, Tianjin Medical University General Hospital Tianjin, China. FAU - Wang, Yuanguo AU - Wang Y AD - Deparment of Cardiothoracic Surgery, Tianjin Medical University General Hospital Tianjin, China. LA - eng PT - Journal Article DEP - 20150409 PL - Singapore TA - Thorac Cancer JT - Thoracic cancer JID - 101531441 PMC - PMC4632927 OTO - NOTNLM OT - Human leukocyte antigen (HLA) OT - loss of heterozygosity (LOH) OT - microsatellite OT - thymic epithelial tumor (TET) EDAT- 2015/11/12 06:00 MHDA- 2015/11/12 06:01 PMCR- 2015/11/01 CRDT- 2015/11/12 06:00 PHST- 2014/11/08 00:00 [received] PHST- 2015/01/05 00:00 [accepted] PHST- 2015/11/12 06:00 [entrez] PHST- 2015/11/12 06:00 [pubmed] PHST- 2015/11/12 06:01 [medline] PHST- 2015/11/01 00:00 [pmc-release] AID - 10.1111/1759-7714.12252 [doi] PST - ppublish SO - Thorac Cancer. 2015 Nov;6(6):749-53. doi: 10.1111/1759-7714.12252. Epub 2015 Apr 9.