Related Experiment Video

Updated: Feb 10, 2026

MicroRNA Detection in Prostate Tumors by Quantitative Real-time PCR qPCR
08:30

MicroRNA Detection in Prostate Tumors by Quantitative Real-time PCR qPCR

Published on: May 16, 2012

25.1K

MicroRNAs as potential therapeutics to enhance chemosensitivity in advanced prostate cancer

Hui-Ming Lin1,2, Iva Nikolic1,2,3, Jessica Yang1

  • 1Cancer Division, The Kinghorn Cancer Centre, Garvan Institute of Medical Research, Darlinghurst, New South Wales, 2010, Australia.

Scientific Reports
|May 20, 2018
PubMed

Insights

Synthetic microRNAs, miR-217 and miR-181b-5p, show promise in enhancing taxane chemotherapy for metastatic castration-resistant prostate cancer (CRPC). These microRNAs may overcome therapeutic resistance by downregulating key cancer-related genes.

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • Metastatic castration-resistant prostate cancer (CRPC) poses significant treatment challenges, with therapeutic resistance to taxane chemotherapy (docetaxel, cabazitaxel) being a major clinical issue.
  • MicroRNAs (miRNAs) are key regulators of gene expression, offering potential therapeutic avenues by targeting multiple signaling pathways simultaneously.
  • Understanding miRNA roles in taxane resistance is crucial for developing novel treatment strategies in CRPC.

Purpose of the Study:

  • To identify specific microRNAs capable of enhancing the efficacy of taxane-based chemotherapy in CRPC.
  • To investigate the potential of synthetic microRNAs as a therapeutic approach to overcome taxane resistance in CRPC.

Main Methods:

  • A genome-wide screen of 1280 microRNAs was conducted in PC3 and DU145 CRPC cell lines treated with docetaxel or cabazitaxel.
  • The impact of miRNA mimics on apoptosis and gene expression was assessed.
  • Individual knockdown of selected target genes was performed to validate their role in miRNA-mediated taxane sensitization.

Main Results:

  • Mimics of miR-217 and miR-181b-5p significantly enhanced apoptosis in PC3 cells when combined with taxanes.
  • These miRNA mimics downregulated over a thousand transcripts, notably those involved in cell proliferation and focal adhesion.
  • Knockdown of selected target genes confirmed their involvement in mediating the taxane-sensitizing effects of the miRNA mimics.

Conclusions:

  • miR-217 and miR-181b-5p hold therapeutic potential for improving taxane response in CRPC by targeting genes regulating cell proliferation and adhesion.
  • These miRNA mimics may represent a novel strategy to overcome therapeutic resistance in CRPC patients.
  • Further development of these miRNA mimics could lead to improved treatment outcomes for CRPC.

More Related Videos

miRNA Expression Analyses in Prostate Cancer Clinical Tissues11:29

miRNA Expression Analyses in Prostate Cancer Clinical Tissues

Published on: September 8, 2015

11.3K
Establishment of Zebrafish Patient-Derived Xenografts from Pancreatic Cancer for Chemosensitivity Testing06:59

Establishment of Zebrafish Patient-Derived Xenografts from Pancreatic Cancer for Chemosensitivity Testing

Published on: May 12, 2023

1.8K

Related Concept Videos

MicroRNAs01:22

MicroRNAs

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...
24.3K
MicroRNAs01:22

MicroRNAs

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...
4.0K
Therapeutic Index01:13

Therapeutic Index

The therapeutic index of a drug is a key parameter in pharmacology that quantifies the relative safety of a drug by calculating the ratio between the dose that causes toxicity in half the population (50%) to the dose that proves to be effective for half the population (50%). It provides a spectrum of doses for a particular drug ranging from effective to potentially toxic. To illustrate, consider an anticoagulant agent like warfarin. It possesses a narrow window within its therapeutic index to...
6.9K
Overview of Advanced Functional Groups02:22

Overview of Advanced Functional Groups


Functional groups are groups of atoms with specific chemical properties that occur within organic molecules and are sometimes denoted as “R”. Functional groups can “functionalize” a compound by enabling it to adopt different physical and chemical properties.
Types of Advanced Functional Groups
The table below summarizes some of the major functional groups in organic chemistry.
30.2K
Potential Energy00:52

Potential Energy

The energy stored by a structure and location of matter in space is called potential energy. For instance, raising a kettlebell changes its spatial location and increases its potential energy. Similarly, a stretched rubber band contains potential energy which, under certain conditions, can be converted into other forms of energy, such as kinetic energy.
Chemical bonds that form attractive forces between atoms also contain potential energy, called chemical energy. When a chemical reaction...
42.8K
Self-Evaluation: Self-Enhancement and Self-Verification03:00

Self-Evaluation: Self-Enhancement and Self-Verification

Social psychologists have documented that feeling good about ourselves and maintaining positive self-esteem is a powerful motivator of human behavior (Tavris & Aronson, 2008). In the United States, members of the predominant culture typically think very highly of themselves and view themselves as good people who are above average on many desirable traits (Ehrlinger, Gilovich, & Ross, 2005). Often, our behavior, attitudes, and beliefs are affected when we experience a threat to our...
5.8K