Leptin receptor expression and its association with PI3K/AKT signaling pathway in diffuse large B-cell lymphoma.

Abstract:

:We investigated the role of the leptin receptor (Ob-R) and its relationship with PI3K/AKT activation in diffuse large B-cell lymphoma (DLBCL) clinical samples followed by in vitro studies using a panel of CRC cell lines. Leptin exerts its physiological action through its receptor Ob-R. Overexpression of Ob-R has been implicated in the pathogenesis of a variety of malignancies; however, its role in DLBCL has not been investigated. Using immunohistochemistry on a large cohort of DLBCL samples in a tissue microarray format, Ob-R immunostaining was detected in 86/216 (39.8%). Ob-R overexpression was associated with the catalytic subunit p110 of PI3K (p = 0.0283), activated AKT (p = 0.0003), and antiapoptotic marker XIAP (p = 0.0008) expression. In in vitro analysis using DLBCL cell lines, our data showed that leptin stimulated cell proliferation and inhibited apoptosis via activation of the PI3K/AKT signaling pathway. Pretreatment of DLBCL cells with Ob-R specific small interference RNA or inactivation of PI3K/AKT activity by LY294002 abolished these responses. Altogether, these data suggest that leptin plays a critical role in DLBCL pathogesis through the P13K/AKT pathway via Ob-R.

journal_name

Leuk Lymphoma

journal_title

Leukemia & lymphoma

authors

Uddin S,Bu R,Ahmed M,Hussain AR,Ajarim D,Al-Dayel F,Bavi P,Al-kuraya KS

doi

10.3109/10428191003802365

subject

Has Abstract

pub_date

2010-07-01 00:00:00

pages

1305-14

issue

7

eissn

1042-8194

issn

1029-2403

journal_volume

51

pub_type

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