An Antisense Transcript Mediates MALAT1 Response in Human Breast Cancer

Overview

Journal BMC Cancer

Publisher Biomed Central

Specialty Oncology

Date 2019 Aug 7

PMID 31382922

Citations 18

Authors

Carla Pereira Gomes

Sandrina Nobrega-Pereira

Beatriz Domingues-Silva

Kenny Rebelo

Catarina Alves-Vale

Sergio Pires Marinho

Tania Carvalho

Sergio Dias

Bruno Bernardes de Jesus

Affiliations

Soon will be listed here.

Abstract

Background: Long non-coding RNAs (lncRNAs) represent a substantial portion of the human transcriptome. LncRNAs present a very stringent cell-type/tissue specificity being potential candidates for therapeutical applications during aging and disease. As example, targeting of MALAT1, a highly conserved lncRNA originally identified in metastatic non-small cell lung cancer, has shown promising results in cancer regression. Nevertheless, the regulation and specificity of MALAT1 have not been directly addressed. Interestingly, MALAT1 locus is spanned by an antisense transcript named TALAM1.

Methods: Here using a collection of breast cancer cells and in vitro and in vivo migration assays we characterized the dynamics of expression and demonstrated that TALAM1 regulates and synergizes with MALAT1 during tumorigenesis.

Results: Down-regulation of TALAM1 was shown to greatly impact on the capacity of breast cancer cells to migrate in vitro or to populate the lungs of immunocompromised mice. Additionally, we demonstrated that TALAM1 cooperates with MALAT1 in the regulation of the properties guiding breast cancer aggressiveness and malignancy.

Conclusions: By characterizing this sense/anti-sense pair we uncovered the complexity of MALAT1 locus regulation, describing new potential candidates for cancer targeting.

Citing Articles

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