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Sunday, 2 June 2019

'RNA interference (RNAi)' technology has gained popularity in the last few years. Why?

  By GK Planet Team       Sunday, 2 June 2019
Q. 'RNA interference (RNAi)' technology has gained popularity in the last few years. Why?
  1. It is used in developing gene silencing therapies.
  2. It can be used in developing therapies for the treatment of cancer.
  3. It can be used to develop hormone replacement therapies.
  4. It can be used to produce crop plants that are resistant to viral pathogens.
Select the correct answer using the code given below.
  1. 1, 2 and 4
  2. 2 and 3
  3. 1 and 3
  4. 1 and 4 only
Answer: 1, 2 and 4

RNA interference 

RNA interference
(RNAi) is a process in living cells. It adjusts (moderates) the activity of their genes. RNAi molecules are key to gene regulation. In 2006, Andrew Fire and Craig Mello shared the Nobel Prize in Physiology or Medicine for their work on RNA interference in the nematode worm Caenorhabditis elegans, published in 1998.
RNA interference (RNAi) or Post-Transcriptional Gene Silencing (PTGS) is a conserved biological response to double-stranded RNA that mediates resistance to both endogenous parasitic and exogenous pathogenic nucleic acids, and regulates the expression of protein-coding genes.
The natural functions of RNA interference are:
  • Immunity against the foreign virus (and other) RNAs
  • Upregulation of genes
  • Downregulation of genes
While traditional chemotherapy can effectively kill cancer cells, lack of specificity for discriminating normal cells and cancer cells in these treatments usually cause severe side effects. Numerous studies have demonstrated that RNAi can provide a more specific approach to inhibit tumor growth by targeting cancer-related genes (i.e., oncogene). It has also been proposed that RNAi can enhance the sensitivity of cancer cells to chemotherapeutic agents, providing a combinatorial therapeutic approach with chemotherapy. Another potential RNAi-based treatment is to inhibit cell invasion and migration.
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