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Hypersensitivity of Ph-positive lymphoid cell lines to rapamycin: Possible clinical application of mTOR inhibitor by Chikara Hirase; Yasuhiro Maeda; Shunsuke Takai; Akihisa Kanamaru is a Medicine article available to read on EtoBox.
What is Hypersensitivity of Ph-positive lymphoid cell lines to rapamycin: Possible clinical application of mTOR inhibitor about?
The BCR/ABL tyrosine kinase inhibitor, imatinib mesylate, has shown substantial effects in chronic myelogenous leukemia (CML) and Ph-positive acute lymphoblastic leukemia (Ph + ALL). However, most patients relapse after an initial clinical response, indicating that drug resistance is a major problem in patients on imatinib. It is a serious problem that effective treatment choices to T315I, in the ABL kinase domain that shows a strong tolerance in imatinib do not exist clinically. In this study, we propose a new therapeutic approach to Ph + ALL with the T315I. Here, we report that the serine/threonine kinase mTOR (the mammalian target of rapamycin) inhibitor, rapamycin, inhibits the growth of not only the Bcr-Abl-positive lymphoid leukemic cell line, SU-Ph2, established from Ph + ALL patients, but also the imatinib-resistant cell line, SU/SR, that has acquired T315I. Rapamycin significantly inhibits cell growth in both these cell lines, and easily induces apoptosis at the same dose, thereby acting as an immunosuppressive agent. Our result suggested that the mTOR-signaling pathway has become an important therapeutic target for Ph-positive leukemias in the future, and at the same time
Who reads Hypersensitivity of Ph-positive lymphoid cell lines to rapamycin: Possible clinical application of mTOR inhibitor?
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- Author
- Chikara Hirase; Yasuhiro Maeda; Shunsuke Takai; Akihisa Kanamaru
- Publisher
- Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 0145-2126)
- Published
- 2009
- Language
- EN
- Field
- Medicine (Health Sciences)