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Related Concept Videos

Cancer-Critical Genes II: Tumor Suppressor Genes01:05

Cancer-Critical Genes II: Tumor Suppressor Genes

Genes usually encode proteins necessary for the proper functioning of a healthy cell. Mutations can often cause changes to the gene expression pattern, thereby altering the phenotype.
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...
Cancer-Critical Genes II: Tumor Suppressor Genes01:05

Cancer-Critical Genes II: Tumor Suppressor Genes

Genes usually encode proteins necessary for the proper functioning of a healthy cell. Mutations can often cause changes to the gene expression pattern, thereby altering the phenotype.
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...
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 ends...
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...
Experimental RNAi02:15

Experimental RNAi

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...
siRNA - Small Interfering RNAs02:30

siRNA - Small Interfering RNAs

Small interfering RNAs, or siRNAs, are short regulatory RNA molecules that can silence genes post-transcriptionally, as well as the transcriptional level in some cases. siRNAs are important for protecting cells against viral infections and silencing transposable genetic elements.
In the cytoplasm, siRNA is processed from a double-stranded RNA, which comes from either endogenous DNA transcription or exogenous sources like a virus. This double-stranded RNA is then cleaved by the ATP-dependent...

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Related Experiment Video

Updated: Jun 20, 2026

Dual CRISPR-Interference Strategy for Targeting Synthetic Lethal Interactions Between Non-Coding RNAs in Cancer Cells
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Dual CRISPR-Interference Strategy for Targeting Synthetic Lethal Interactions Between Non-Coding RNAs in Cancer Cells

Published on: May 30, 2025

Can Sir(2) regulate cancer?

Pratibha V Nerurkar1, Vivek R Nerurkar

  • 1Laboratory of Metabolic Disorders and Alternative Medicine, Dept. of Molecular Biosciences and Bioengineering (MBBE), CTAHR, , University of Hawaii, Honolulu.

Cellscience
|September 28, 2011
PubMed
Summary

Sirtuin activators show promise for metabolic disorders and aging. However, inhibiting sirtuin 1 (SIRT1) may benefit cancer treatment and fragile X syndrome by modulating cell death and gene expression.

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Genetics

Background:

  • Sirtuin activators, like resveratrol, are investigated for metabolic health and anti-aging effects.
  • Sirtuin 1 (SIRT1) plays a dual role, with potential benefits in aging and metabolic disorders.
  • Recent research highlights negative regulation of SIRT1.

Purpose of the Study:

  • To explore the dual role of sirtuin 1 (SIRT1) in both promoting health and disease.
  • To investigate the therapeutic potential of modulating SIRT1 activity.

Main Methods:

  • Review of recent studies on sirtuin activators and inhibitors.
  • Analysis of SIRT1's interaction with deleted in breast cancer 1 (DBC1).
  • Examination of SIRT1's role in p53-induced apoptosis and radiation sensitization in cancer cells.

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Analysis of Combinatorial miRNA Treatments to Regulate Cell Cycle and Angiogenesis

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DNA Vector-based RNA Interference to Study Gene Function in Cancer
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DNA Vector-based RNA Interference to Study Gene Function in Cancer

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Related Experiment Videos

Last Updated: Jun 20, 2026

Dual CRISPR-Interference Strategy for Targeting Synthetic Lethal Interactions Between Non-Coding RNAs in Cancer Cells
07:23

Dual CRISPR-Interference Strategy for Targeting Synthetic Lethal Interactions Between Non-Coding RNAs in Cancer Cells

Published on: May 30, 2025

Analysis of Combinatorial miRNA Treatments to Regulate Cell Cycle and Angiogenesis
11:44

Analysis of Combinatorial miRNA Treatments to Regulate Cell Cycle and Angiogenesis

Published on: March 30, 2019

DNA Vector-based RNA Interference to Study Gene Function in Cancer
13:10

DNA Vector-based RNA Interference to Study Gene Function in Cancer

Published on: June 4, 2012

Main Results:

  • Sirtuin activators are beneficial for metabolic disorders and aging.
  • Targeted silencing of SIRT1 by DBC1 promotes cancer cell apoptosis and radiation sensitivity.
  • Negative SIRT1 regulation alleviates gene repression in fragile X mental retardation syndrome.

Conclusions:

  • Modulating sirtuin 1 (SIRT1) activity is a critical regulatory point for disease pathogenesis.
  • Targeted activation or inhibition of SIRT1 offers potential therapeutic strategies for diverse conditions.