Related Experiment Video
Updated: Dec 26, 2025
08:40
Genome-wide Screen for miRNA Targets Using the MISSION Target ID Library
Published on: April 6, 2012
17.9K
miRNA-7 and miRNA-324-5p regulate alpha9-Integrin expression and exert anti-oncogenic effects in rhabdomyosarcoma
C Molist1, N Navarro1, I Giralt1
1Laboratory of Translational Research in Child and Adolescent Cancer, Vall D'Hebron Research Institute, Hospital Universitari Vall D'Hebron, Universitat Autònoma de Barcelona, Barcelona, Spain.
Cancer Letters
|March 7, 2020
Summary
New microRNAs, miR-7 and miR-324-5p, show potential for treating metastatic rhabdomyosarcoma (RMS). Overexpressing these miRNAs inhibited tumor growth and metastasis, offering hope for improved pediatric cancer prognosis.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- Metastatic rhabdomyosarcoma (RMS) has a poor prognosis in children.
- Alpha-9 integrin (ITGA9) is implicated in cancer progression and invasiveness.
- MicroRNA (miRNA) regulation of ITGA9 is largely unstudied.
Purpose of the Study:
- To identify and characterize miRNAs that regulate ITGA9 in RMS.
- To investigate the effects of miR-7 and miR-324-5p on RMS cell proliferation and invasion.
- To evaluate the therapeutic potential of these miRNAs in preclinical RMS models.
Main Methods:
- Screening for ITGA9 regulators.
- Overexpression of miR-7 and miR-324-5p in RMS cells.
- Assessment of cell proliferation and invasion in vitro.
- Evaluation of tumor growth and lung metastasis in orthotopic RMS models.
Main Results:
- Overexpression of both miR-7 and miR-324-5p impaired RMS cell proliferation.
- miR-7 overexpression significantly reduced RMS cell invasion.
- Stable overexpression of both miRNAs reduced tumor growth in vivo.
- miR-7 inhibited lung metastatic colonization in a preclinical model.
Conclusions:
- miR-7 and miR-324-5p exhibit anti-oncogenic and anti-metastatic properties in RMS.
- These miRNAs represent potential novel therapeutic agents for combating RMS progression.
- Targeting ITGA9 via miR-7 and miR-324-5p offers a promising strategy for improving pediatric sarcoma treatment.
Related Concept Videos
01:22MicroRNAs
3.6K
MicroRNA (miRNA) are short, regulatory RNA transcribed from introns (non-coding regions of a gene) or intergenic regions (stretches of DNA present between genes). Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself, forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA...
3.6K
01:22MicroRNAs
23.8K
MicroRNA (miRNA) are short, regulatory RNA transcribed from introns—non-coding regions of a gene—or intergenic regions—stretches of DNA present between genes. Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After...
23.8K
02:23Abnormal Proliferation
5.0K
Under normal conditions, most adult cells remain in a non-proliferative state unless stimulated by internal or external factors to replace lost cells. Abnormal cell proliferation is a condition in which the cell's growth exceeds and is uncoordinated with normal cells. In such situations, cell division persists in the same excessive manner even after cessation of the stimuli, leading to persistent tumors. The tumor arises from the damaged cells that replicate to pass the damage to the...
5.0K
02:15Experimental RNAi
7.2K
RNA interference (RNAi) is a cellular mechanism that inhibits gene expression by suppressing its transcription or activating the RNA degradation process. The mechanism was discovered by Andrew Fire and Craig Mello in 1998 in plants. Today, it is observed in almost all eukaryotes, including protozoa, flies, nematodes, insects, parasites, and mammals. This precise cellular mechanism of gene silencing has been developed into a technique that provides an efficient way to identify and determine the...
7.2K
03:03mTOR Signaling and Cancer Progression
4.5K
The mammalian target of rapamycin or mTOR protein was discovered in 1994 due to its direct interaction with rapamycin. The protein gets its name from a yeast homolog called TOR. The mTOR protein complex in mammalian cells plays a major role in balancing anabolic processes such as the synthesis of proteins, lipids, and nucleotides and catabolic processes, such as autophagy in response to environmental cues, such as availability of nutrients and growth factors.
The mTOR pathway or the...
The mTOR pathway or the...
4.5K
01:20The Retinoblastoma Gene
4.6K
Tumor suppressor genes are normal genes that can slow down cell division, repair DNA mistakes, or program the cells for apoptosis in case of irreparable damage. Hence, they play an essential role in preventing the proliferation of damaged cells.
The first-ever tumor suppressor gene called Rb was identified in retinoblastoma - a rare eye tumor in children. In inherited forms of the disease, a child inherits one defective copy of the Rb gene, which predisposes them to retinoblastoma. However,...
The first-ever tumor suppressor gene called Rb was identified in retinoblastoma - a rare eye tumor in children. In inherited forms of the disease, a child inherits one defective copy of the Rb gene, which predisposes them to retinoblastoma. However,...
4.6K