Open Access

Toll like receptors TLR1/2, TLR6 and MUC5B as binding interaction partners with cytostatic proline rich polypeptide 1 in human chondrosarcoma

  • Authors:
    • Karina Galoian
    • Silva Abrahamyan
    • Gor Chailyan
    • Amir Qureshi
    • Parthik Patel
    • Gil Metser
    • Alexandra Moran
    • Inesa Sahakyan
    • Narine Tumasyan
    • Albert Lee
    • Tigran Davtyan
    • Samvel Chailyan
    • Armen Galoyan
  • View Affiliations

  • Published online on: November 9, 2017     https://doi.org/10.3892/ijo.2017.4199
  • Pages:139-154
  • Copyright: © Galoian et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

Metastatic chondrosarcoma is a bone malignancy not responsive to conventional therapies; new approaches and therapies are urgently needed. We have previously reported that mTORC1 inhibitor, antitumorigenic cytostatic proline rich polypeptide 1 (PRP-1), galarmin caused a significant upregulation of tumor suppressors including TET1/2 and SOCS3 (known to be involved in inflammatory processes), downregulation of oncoproteins and embryonic stem cell marker miR-302C and its targets Nanog, c-Myc and Bmi-1 in human chondrosarcoma. To understand better the mechanism of PRP-1 action it was very important to identify the receptor it binds to. Nuclear pathway receptor and GPCR assays indicated that PRP-1 receptors are not G protein coupled, neither do they belong to family of nuclear or orphan receptors. In the present study, we have demonstrated that PRP-1 binding interacting partners belong to innate immunity pattern recognition toll like receptors TLR1/2 and TLR6 and gel forming secreted mucin MUC5B. MUC5B was identified as PRP-1 receptor in human chondrosarcoma JJ012 cell line using Ligand-receptor capture technology. Toll like receptors TLR1/2 and TLR6 were identified as binding interaction partners with PRP-1 by western blot analysis in human chondrosarcoma JJ012 cell line lysates. Immunocytochemistry experiments confirmed the finding and indicated the localization of PRP-1 receptors in the tumor nucleus predominantly. TLR1/2, TLR6 and MUC5B were downregulated in human chondrosarcoma and upregulated in dose-response manner upon PRP-1 treatment. Experimental data indicated that in this cellular context the mentioned receptors had tumor suppressive function.

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January 2018
Volume 52 Issue 1

Print ISSN: 1019-6439
Online ISSN:1791-2423

2016 Impact Factor: 3.079
Ranked #33/217 Oncology
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APA
Galoian, K., Abrahamyan, S., Chailyan, G., Qureshi, A., Patel, P., Metser, G. ... Galoyan, A. (2018). Toll like receptors TLR1/2, TLR6 and MUC5B as binding interaction partners with cytostatic proline rich polypeptide 1 in human chondrosarcoma. International Journal of Oncology, 52, 139-154. https://doi.org/10.3892/ijo.2017.4199
MLA
Galoian, K., Abrahamyan, S., Chailyan, G., Qureshi, A., Patel, P., Metser, G., Moran, A., Sahakyan, I., Tumasyan, N., Lee, A., Davtyan, T., Chailyan, S., Galoyan, A."Toll like receptors TLR1/2, TLR6 and MUC5B as binding interaction partners with cytostatic proline rich polypeptide 1 in human chondrosarcoma". International Journal of Oncology 52.1 (2018): 139-154.
Chicago
Galoian, K., Abrahamyan, S., Chailyan, G., Qureshi, A., Patel, P., Metser, G., Moran, A., Sahakyan, I., Tumasyan, N., Lee, A., Davtyan, T., Chailyan, S., Galoyan, A."Toll like receptors TLR1/2, TLR6 and MUC5B as binding interaction partners with cytostatic proline rich polypeptide 1 in human chondrosarcoma". International Journal of Oncology 52, no. 1 (2018): 139-154. https://doi.org/10.3892/ijo.2017.4199