Related Experiment Video

Updated: Jul 1, 2025

miRNA Expression Analyses in Prostate Cancer Clinical Tissues
11:29

miRNA Expression Analyses in Prostate Cancer Clinical Tissues

Published on: September 8, 2015

10.9K

Methylation Status of miR-34a and miR-126 in Non-Small Cell Lung Cancer (NSCLC) Tumor Tissues

Nazanin Mehrzad1, Mohammad Saber Zamani1, Amirabbas Rahimi1

  • 1Molecular Medicine Department, Biotechnology Research Center, Pasteur Institute of Iran, Tehran, Iran.

Iranian Biomedical Journal
|March 6, 2024
PubMed
Abstract

Insights

Methylation analysis of miR-34a and miR-126 in non-small cell lung cancer (NSCLC) tissues showed no significant differences between tumor and normal samples. Further investigation is needed to understand the silencing mechanisms of these tumor suppressors in NSCLC.

Area of Science:

  • Oncology
  • Molecular Biology
  • Epigenetics

Background:

  • MicroRNAs (miRNAs), specifically miR-34a and miR-126, function as tumor suppressors.
  • These miRNAs are frequently downregulated in various cancers, including non-small cell lung cancer (NSCLC).

Purpose of the Study:

  • To investigate the methylation status of miR-34a and miR-126 in NSCLC patients.
  • To explore potential correlations between miRNA methylation and clinicopathological features.

Main Methods:

  • The study involved 63 NSCLC and paired adjacent normal tissues.
  • DNA was extracted and bisulfite-treated, followed by methylation-specific PCR (MSP) analysis for miR-34a and miR-126.

Main Results:

  • No statistically significant differences in the methylation status of miR-34a and miR-126 were observed between NSCLC and normal tissues (p > 0.05).
  • No significant correlation was found between the methylation status of these miRNAs and patient demographic parameters (gender, age, pathology subtype).

Conclusions:

  • The study did not find promoter hypermethylation to be the primary mechanism for silencing miR-34a and miR-126 in NSCLC.
  • More sensitive methods are recommended to detect methylation levels or explore alternative silencing mechanisms for these crucial tumor suppressor genes in NSCLC.
Keywords:
DNA methylationNon-small cell lung carcinomamiR-126miR-34a

More Related Videos

MicroRNA Based Liquid Biopsy: The Experience of the Plasma miRNA Signature Classifier MSC for Lung Cancer Screening08:14

MicroRNA Based Liquid Biopsy: The Experience of the Plasma miRNA Signature Classifier MSC for Lung Cancer Screening

Published on: October 26, 2017

15.7K
Analysis of Combinatorial miRNA Treatments to Regulate Cell Cycle and Angiogenesis11:44

Analysis of Combinatorial miRNA Treatments to Regulate Cell Cycle and Angiogenesis

Published on: March 30, 2019

7.6K

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...
21.3K
lncRNA - Long Non-coding RNAs02:39

lncRNA - Long Non-coding RNAs

In humans, more than 80% of the genome gets transcribed. However, only around 2% of the genome codes for proteins. The remaining part produces non-coding RNAs which includes ribosomal RNAs, transfer RNAs, telomerase RNAs, and regulatory RNAs, among other types. A large number of regulatory non-coding RNAs have been classified into two groups depending upon their length – small non-coding RNAs, such as microRNA, which are less than 200 nucleotides in length, and long non-coding RNA...
8.6K