Understanding CRISPR
CRISPR stands for clustered regularly interspaced short palindromic repeats. It functions as a form of scissors that can precisely cut into DNA sequences. It uses a type of RNA, called guide RNA (gRNA) to lead the special Cas9 protein to the targeted sequence.
How Does CRISPR Work?
Identification: Researchers start by identifying the sequence that they want to alter. This is called the target sequence. Then the gRNA is created, using an application such as ZiFit, to be complementary to the sequence.
Binding and Cutting: The gRNA and Cas9 protein both bond to the sequence. Then, with the help of the gRNA, Cas9 makes a cut into the DNA at the sequence at a targeted spot. This cut can be used to remove a segment of DNA or insert new genetic material.
Applications of CRISPR
Medical Research: CRISPR could be used to prevent and treat cancer. Its editing ability means that it can fix single and multi-gene mutations. Apart from treating diseases, CRISPR can also treat conditions such as blindness and hearing loss.
Agriculture: In agriculture, CRISPR can be used to create genetically modified crops with only desired traits. These traits include a longer growing season, crops with more nutrition, and resistance to diseases. This could help address global food challenges.
Ethical Considerations
There are certain ethical and safety concerns related to the use of CRISPR technology. The biggest issues regarding editing human genes are the risks it poses to human safety. There could be unforeseen or undesirable side effects that result as a consequence of trying to correct a disease.
My Thoughts:
Even though CRISPR revolutionary technology is genetic engineering, it has the risk of causing unintended and undesirable side effects. Its wide range of applications has the power to change medicine and agriculture. As more research is conducted and technology continues to evolve, the full extent of CRISPR’s impact is yet to be realized, but its potential is endless.
4/6/2024
Resources:
Fyodor Urnov is a Professor of Molecular and Cell Biology at the University of California. “CRISPR in Medicine.” Innovative Genomics Institute (IGI), 16 Nov. 2022, innovativegenomics.org/crisprpedia/crispr-in-medicine/.
Kennedy, Edward M, et al. “Inactivation of the Human Papillomavirus E6 or E7 Gene in Cervical Carcinoma Cells by Using a Bacterial CRISPR/CAS RNA-Guided Endonuclease.” Journal of Virology, U.S. National Library of Medicine, Oct. 2014, www.ncbi.nlm.nih.gov/pmc/articles/PMC4178730/.
Liu, Qier, et al. “Application of CRISPR/Cas9 in Crop Quality Improvement.” International Journal of Molecular Sciences, U.S. National Library of Medicine, 19 Apr. 2021, www.ncbi.nlm.nih.gov/pmc/articles/PMC8073294/.
