Blockade of thymic stromal lymphopoietin (TSLP) receptor inhibits TSLP-driven proliferation and signalling in lymphoblasts from a subset of B-precursor ALL patients

Vetter, Tina, Borowski, Andreas, Wohlmann, Andreas, Ranjan, Nilabh, Kuepper, Michael, Badura, Susanne, Ottmann, Oliver ORCID: https://orcid.org/0000-0001-9559-1330 and Friedrich, Karlheinz 2016. Blockade of thymic stromal lymphopoietin (TSLP) receptor inhibits TSLP-driven proliferation and signalling in lymphoblasts from a subset of B-precursor ALL patients. Leukemia Research 40 , pp. 38-43. 10.1016/j.leukres.2015.10.003

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Abstract

PURPOSE: The cytokine thymic stromal lymphopoietin (TSLP) and its receptor TSLPR are involved in intercellular communication in the course of allergic inflammation and have recently been implicated in the development of various malignancies including B cell precursor acute lymphoblastic leukemia (BCP-ALL). We studied TSLPR expression, TSLP-induced signal transduction and its antibody-mediated inhibition in long-term cultures of primary cells derived from B-precursor ALL patients. METHODS: TSLPR expression was determined by flow cytometry and Western blot analysis, cell proliferation, signal transduction via the JAK/STAT pathway was analysed by Western blot detection of STAT tyrosine phosphorylation and by measuring TSLP-dependent activation of a STAT-specific reporter gene construct. For inhibition studies a recently introduced antagonistic antibody to the TSLPRα-subunit was used. RESULTS: TSLPR surface expression was observed in leukemic lymphoblasts from two out of ten patients with BCP-ALL. Upon TSLP stimulation, the cells with the highest TSLPR expression level showed enhanced proliferation and JAK/STAT-mediated gene regulation in a dose-dependent manner. By employment of an inhibitory antibody to the TSLPR, both TSLP-triggered cell proliferation and STAT transcription factor activation were specifically inhibited. CONCLUSIONS: These results suggest that blockade of the TSLPR might be a therapeutic option for a subset of BCP-ALL patients.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Medicine
Subjects:	R Medicine > R Medicine (General)
Uncontrolled Keywords:	B-precursor ALL; Cytokine receptors; Inhibitory antibody; TSLP
Publisher:	Elsevier
ISSN:	0145-2126
Date of Acceptance:	9 October 2015
Last Modified:	02 Nov 2022 09:41
URI:	https://orca.cardiff.ac.uk/id/eprint/96042

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