Knockdown of the Hippo transducer YAP reduces proliferation and promotes apoptosis in the Jurkat leukemia cell

Wu,Ran; Yang,Hui; Wan,Jiangbo; Deng,Xiaohui; Chen,Linjun; Hao,Siguo; Ma,Liyuan

doi:10.3892/mmr.2018.9556

Knockdown of the Hippo transducer YAP reduces proliferation and promotes apoptosis in the Jurkat leukemia cell

Authors:
- Ran Wu
- Hui Yang
- Jiangbo Wan
- Xiaohui Deng
- Linjun Chen
- Siguo Hao
- Liyuan Ma
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Affiliations: Department of Hematology, Xinhua Hospital, Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai 200092, P.R. China, Department of Hematology, Shanghai 6th People's Hospital, Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai 200092, P.R. China
Published online on: October 15, 2018 https://doi.org/10.3892/mmr.2018.9556
Pages: 5379-5388
Copyright: © Wu et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

Leukemia and lymphoma are common hematological malignancies in children and young adults, which pose a tremendous threat to the survival of these young patients worldwide, despite availability of various effective treatments. The Hippo pathway is a novel‑signaling pathway that regulates organ size, cell proliferation, apoptosis and tumorigenesis. The chief component of this pathway is the transducer yes‑associated protein (YAP) which is over‑expressed in numerous categories of tumors. However, little is known about the effect of YAP in hematological malignancies. In the present study, YAP expression was screened in several leukemia and lymphoma cell lines, and high YAP expression was demonstrated in Jurkat cells. To further unravel its effect on the biological behavior of Jurkat cells, lentivirus transduced short hairpin RNA (shRNA) technique was used to silence YAP. As expected, the YAP‑specific shRNA dramatically inhibited YAP expression at the mRNA and protein levels. Reduced leukemia cell proliferation and increased cell apoptosis were demonstrated in YAP knockdown Jurkat cells. It was also demonstrated that YAP knockdown resulted in deregulated expression of a cluster of downstream genes crucial to cell proliferation or apoptosis, including protein kinase B, B‑cell lymphoma 2 (BCL2) and BCL2 like protein 1. Consequently, the results of the present study established that suppression of YAP expression serves an important role in Jurkat cell proliferation and apoptosis, which may serve as a potential therapeutic target.

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