Expression of E-cadherin and specific CXCR3 isoforms impact each other in prostate cancer

BACKGROUND: Carcinoma cells shift between epithelial and mesenchymal phenotypes during cancer progression, as defined by surface presentation of the cell-cell cohesion molecule E-cadherin, affecting dissemination, progression and therapy responsiveness. Concomitant with the loss of E-cadherin during the mesenchymal transition, the predominant receptor isoform for ELR-negative CXC ligands shifts from CXCR3-B to CXCR3-A which turns this classical G-protein coupled receptor from an inhibitor to an activator of cell migration, thus promoting tumor cell invasiveness. We proposed that CXCR3 was not just a coordinately changed receptor but actually a regulator of the cell phenotype.

METHODS: Immunoblotting, immunofluorescence, quantitative real-time PCR and flow cytometry assays investigated the expression of E-cadherin and CXCR3 isoforms. Intrasplenic inoculation of human prostate cancer (PCa) cells with spontaneous metastasis to the liver analyzed E-cadherin and CXCR3-B expression during cancer progression in vivo.

RESULTS: We found reciprocal regulation of E-cadherin and CXCR3 isoforms. E-cadherin surface expression promoted CXCR3-B presentation on the cell membrane, and to a lesser extent increased its mRNA and total protein levels. In turn, forced expression of CXCR3-A reduced E-cadherin expression level, whereas CXCR3-B increased E-cadherin in PCa. Meanwhile, a positive correlation of E-cadherin and CXCR3-B expression was found both in experimental PCa liver micro-metastases and patients' tissue.

CONCLUSIONS: CXCR3-B and E-cadherin positively correlated in vitro and in vivo in PCa cells and liver metastases, whereas CXCR3-A negatively regulated E-cadherin expression. These results suggest that CXCR3 isoforms may play important roles in cancer progression and dissemination via diametrically regulating tumor's phenotype.

Medienart:

E-Artikel

Erscheinungsjahr:

2019

Erschienen:

2019

Enthalten in:

Zur Gesamtaufnahme - volume:17

Enthalten in:

Cell communication and signaling : CCS - 17(2019), 1 vom: 12. Dez., Seite 164

Sprache:

Englisch

Beteiligte Personen:

Ma, Bo [VerfasserIn]
Khazali, Ahmad [VerfasserIn]
Shao, Hanshuang [VerfasserIn]
Jiang, Yuhan [VerfasserIn]
Wells, Alan [VerfasserIn]

Links:

Volltext

Themen:

CXCR3 protein, human
CXCR3 variant
CXCR3-B
Cadherins
E-cadherin
EMT
Journal Article
MErT
Prostate cancer; metastasis
Protein Isoforms
Receptors, CXCR3
Research Support, N.I.H., Extramural
Research Support, U.S. Gov't, Non-P.H.S.

Anmerkungen:

Date Completed 01.10.2020

Date Revised 22.10.2020

published: Electronic

Citation Status MEDLINE

doi:

10.1186/s12964-019-0489-1

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM304322504