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Updated: Jan 21, 2026
Modeling Breast Cancer in Human Breast Tissue using a Microphysiological System
Published on: April 23, 2021
An antisense transcript mediates MALAT1 response in human breast cancer
Carla Pereira Gomes1, Sandrina Nóbrega-Pereira1,2, Beatriz Domingues-Silva1
1Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, 1649-028, Lisbon, Portugal.
The antisense transcript TALAM1 regulates and synergizes with MALAT1, a long non-coding RNA (lncRNA), impacting breast cancer cell migration and aggressiveness. This discovery reveals new therapeutic targets for cancer treatment.
Area of Science:
- Molecular Biology
- Genetics
- Cancer Research
Background:
- Long non-coding RNAs (lncRNAs) are key regulators with cell-type specificity, offering therapeutic potential in aging and disease.
- MALAT1, a conserved lncRNA in metastatic lung cancer, shows promise for cancer regression, but its regulation remains unclear.
- The MALAT1 locus is associated with an antisense transcript, TALAM1, suggesting a regulatory relationship.
Purpose of the Study:
- To characterize the expression dynamics and function of TALAM1 in relation to MALAT1.
- To investigate the role of the TALAM1/MALAT1 pair in breast cancer tumorigenesis and aggressiveness.
- To explore potential therapeutic strategies targeting the MALAT1 locus.
Main Methods:
- Utilized a panel of breast cancer cell lines for in vitro studies.
- Performed in vitro and in vivo migration assays to assess cell motility.
- Analyzed the expression and functional interplay between TALAM1 and MALAT1.
Main Results:
- Down-regulation of TALAM1 significantly impaired breast cancer cell migration in vitro and metastasis in vivo.
- TALAM1 was demonstrated to cooperate with MALAT1 in regulating breast cancer aggressiveness and malignancy.
- The study uncovered the complex regulation of the MALAT1 locus by its antisense partner, TALAM1.
Conclusions:
- The sense/antisense pair TALAM1 and MALAT1 plays a crucial role in breast cancer progression.
- TALAM1 acts as a regulator and synergizes with MALAT1, influencing key aspects of tumorigenesis.
- This research identifies novel therapeutic targets within the MALAT1 locus for cancer intervention.
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