Differences in Transcript Levels of ABC Transporters Between Pancreatic Adenocarcinoma and Nonneoplastic Tissues

作者：Mohelnikova Duchonova Beatrice^*; Brynychova Veronika; Oliverius Martin; Honsova Eva; Kala Zdenek; Muckova Katarina; Soucek Pavel

来源：Pancreas, 2013, 42(4): 707-716.

DOI：10.1097/MPA.0b013e318279b861

• pancreas
• carcinoma
• ABC transporters
• expression
• KRAS

Objectives: The aim of this study was to evaluate transcript levels of all 49 human ATP-binding cassette transporters (ABCs) in one of the most drug-resistant cancers, namely, the pancreatic ductal adenocarcinoma (PDAC). Association of ABCs levels with clinical-pathologic characteristics and KRAS mutation status was followed as well. %26lt;br%26gt;Methods: Tumors and adjacent nonneoplastic tissues were obtained from 32 histologically verified PDAC patients. The transcript profile of ABCs was assessed using quantitative real-time polymerase chain reaction with a relative standard curve. KRAS mutations in exon 2 were assessed by high-resolution melting analysis and sequencing. %26lt;br%26gt;Results: Most ABCs were deregulated in PDAC and 10 ABCs were associated with clinical-pathologic characteristics. KRAS mutations did not change the global expression profile of ABCs. %26lt;br%26gt;Conclusions: The expression of ABC transporters was significantly deregulated in PDAC tumors when compared to nonmalignant tissues. The observed up-regulation of ABCB4, ABCB11, ABCC1, ABCC3, ABCC5, ABCC10, and ABCG2 in tumors may contribute to the generally poor treatment response of PDAC. The up-regulation of ABCA1, ABCA7, and ABCG1 implicates a serious impairment of cellular cholesterol homeostasis in PDAC. On the other hand, the observed down-regulation of ABCA3, ABCC6, ABCC7, and ABCC8 suggests a possible role of stem cells in the development and progression of PDAC.

• 出版日期2013-5