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KIF5B-ALK, a Novel Fusion Oncokinase Identified by an Immunohistochemistry-based Diagnostic System for ALK-positive Lung Cancer

Takeuchi, Kengo, Choi, Young Lim, Togashi, Yuki, Soda, Manabu, Hatano, Satoko, Inamura, Kentaro, Takada, Shuji, Ueno, Toshihide, Yamashita, Yoshihiro, Satoh, Yukitoshi, Okumura, Sakae, Nakagawa, Ken, Ishikawa, Yuichi, Mano, Hiroyuki·2009·Clinical Cancer Research

Abstract

Purpose: EML4-ALK is a transforming fusion tyrosine kinase, several isoforms of which have been identified in lung cancer. Immunohistochemical detection of EML4-ALK has proved difficult, however, likely as a result of low transcriptional activity conferred by the promoter-enhancer region of EML4. The sensitivity of EML4-ALK detection by immunohistochemistry should be increased adequately. Experimental Design: We developed an intercalated antibody-enhanced polymer (iAEP) method that incorporates an intercalating antibody between the primary antibody to ALK and the dextran polymer-based detection reagents. Results: Our iAEP method discriminated between tumors positive or negative for EML4-ALK in a test set of specimens. Four tumors were also found to be positive for ALK in an archive of lung adenocarcinoma (n = 130) and another 4 among fresh cases analyzed in a diagnostic laboratory. These 8 tumors were found to include 1 with EML4-ALK variant 1, 1 with variant 2, 3 with variant 3, and 2 with previously unidentified variants (designated variants 6 and 7). Inverse reverse transcription-PCR analysis revealed that the remaining tumor harbored a novel fusion in which intron 24 of KIF5B was ligated to intron 19 of ALK. Multiplex reverse transcription-PCR analysis of additional archival tumor specimens identified another case of lung adenocarcinoma positive for KIF5B-ALK. Conclusions: The iAEP method should prove suitable for immunohistochemical screening of tumors positive for ALK or ALK fusion proteins among pathologic archives. Coupling of PCR-based detection to the iAEP method should further facilitate the rapid identification of novel ALK fusion genes such as KIF5B-ALK.

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Metadata

Authors
Takeuchi, K., Choi, Y. L., Togashi, Y., Soda, M., Hatano, S., Inamura, K., Takada, S., Ueno, T., Yamashita, Y., Satoh, Y., Okumura, S., Nakagawa, K., Ishikawa, Y., & Mano, H.
Venue
Clinical Cancer Research
Published
2009-04-30
Volume
15
Issue
9
Pages
3143-3149
ISSN
  • 1078-0432 (ISSN-L)
  • 1557-3265
OpenAlex
W2123727052
Cited by
717
References
21
FWCI
48.53
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: KIF5B-ALK, a Novel Fusion Oncokinase Identified by an Immunohistochemistry-based Diagnostic System for ALK-positive Lung Cancer. https://app.cochat.ai/papers/10.1158/1078-0432.ccr-08-3248
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Takeuchi, K., Choi, Y. L., Togashi, Y., Soda, M., Hatano, S., Inamura, K., Takada, S., Ueno, T., Yamashita, Y., Satoh, Y., Okumura, S., Nakagawa, K., Ishikawa, Y., & Mano, H. (2009). KIF5B-ALK, a Novel Fusion Oncokinase Identified by an Immunohistochemistry-based Diagnostic System for ALK-positive Lung Cancer. Clinical Cancer Research. https://doi.org/10.1158/1078-0432.ccr-08-3248

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