Open Access

LRIG1 negatively regulates RET mutants and is downregulated in thyroid cancer

  • Authors:
    • David Lindquist
    • Fernando C. Alsina
    • Carl Herdenberg
    • Catharina Larsson
    • Jo Höppener
    • Na Wang
    • Gustavo Paratcha
    • Miklós Tarján
    • Tibor Tot
    • Roger Henriksson
    • Håkan Hedman
  • View Affiliations

  • Published online on: February 9, 2018     https://doi.org/10.3892/ijo.2018.4273
  • Pages: 1189-1197
  • Copyright: © Lindquist et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

Papillary thyroid carcinoma (PTC) and medullary thyroid carcinoma (MTC) are characterized by genomic rearrangements and point mutations in the proto-oncogene RET. Leucine-rich repeats and immunoglobulin-like domains 1 (LRIG1) is a suppressor of various receptor tyrosine kinases, including RET. LRIG1 expression levels are associated with patient survival in many cancer types. In the present study, we investigated whether the oncogenic RET mutants RET2A (C634R) and RET2B (M918T) were regulated by LRIG1, and the possible effects of LRIG1 expression in thyroid cancer were investigated in three different clinical cohorts and in a RET2B-driven mouse model of MTC. LRIG1 was shown to physically interact with both RET2A and RET2B and to restrict their ligand-independent activation. LRIG1 mRNA levels were downregulated in PTC and MTC compared to normal thyroid gland tissue. There was no apparent association between LRIG1 RNA or protein expression levels and patient survival in the studied cohorts. The transgenic RET2B mice developed pre-cancerous medullary thyroid lesions at a high frequency (36%); however, no overt cancers were observed. There was no significant difference in the incidence of pre-cancerous lesions between Lrig1 wild-type and Lrig1-deficient RET2B mice. In conclusion, the findings that LRIG1 is a negative regulator of RET2A and RET2B and is also downregulated in PTC and MTC may suggest that LRIG1 functions as a thyroid tumor suppressor.
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April-2018
Volume 52 Issue 4

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

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Spandidos Publications style
Lindquist D, Alsina FC, Herdenberg C, Larsson C, Höppener J, Wang N, Paratcha G, Tarján M, Tot T, Henriksson R, Henriksson R, et al: LRIG1 negatively regulates RET mutants and is downregulated in thyroid cancer. Int J Oncol 52: 1189-1197, 2018
APA
Lindquist, D., Alsina, F.C., Herdenberg, C., Larsson, C., Höppener, J., Wang, N. ... Hedman, H. (2018). LRIG1 negatively regulates RET mutants and is downregulated in thyroid cancer. International Journal of Oncology, 52, 1189-1197. https://doi.org/10.3892/ijo.2018.4273
MLA
Lindquist, D., Alsina, F. C., Herdenberg, C., Larsson, C., Höppener, J., Wang, N., Paratcha, G., Tarján, M., Tot, T., Henriksson, R., Hedman, H."LRIG1 negatively regulates RET mutants and is downregulated in thyroid cancer". International Journal of Oncology 52.4 (2018): 1189-1197.
Chicago
Lindquist, D., Alsina, F. C., Herdenberg, C., Larsson, C., Höppener, J., Wang, N., Paratcha, G., Tarján, M., Tot, T., Henriksson, R., Hedman, H."LRIG1 negatively regulates RET mutants and is downregulated in thyroid cancer". International Journal of Oncology 52, no. 4 (2018): 1189-1197. https://doi.org/10.3892/ijo.2018.4273