Crispr Loss Of Function
Crispr Loss Of Function - Related Videos
01:59
CRISPR
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2019
Genome editing technologies allow scientists to modify an organism’s DNA via the addition, removal, or rearrangement of genetic material at specific genomic locations. These types of techniques could potentially be used to cure genetic disorders such as hemophilia and sickle cell anemia. One popular and widely used DNA-editing research tool that could lead to safe and effective cures for genetic disorders is the CRISPR-Cas9 system. CRISPR-Cas9 stands for Clustered Regularly Interspaced Short...
09:39
CRISPR-mediated Loss of Function Analysis in Cerebellar Granule Cells Using In Utero Electroporation-based Gene Transfer
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Cited by 4 •
2018
Conventional loss-of-function studies of genes using knockout animals have often been costly and time-consuming. Electroporation-based CRISPR-mediated somatic mutagenesis is a powerful tool to understand gene functions in vivo. Here, we report a method to analyze knockout phenotypes in proliferating cells of the cerebellum.
01:12
Loss of Tumor Suppressor Gene Functions
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2023
Tumor suppressor genes are normal genes that can slow down cell division, repair DNA mistakes, or program the cells for apoptosis in case of irreparable damage. Hence, they play an essential role in preventing the proliferation of damaged cells. When the tumor suppressor genes develop mutations or are lost, cells start growing out of control, leading to cancer. However, a single functional copy of the tumor suppressor gene is enough for the cells to maintain their normal functions and cell...
01:12
Loss of Tumor Suppressor Gene Functions
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2021
Tumor suppressor genes are normal genes that can slow down cell division, repair DNA mistakes, or program the cells for apoptosis in case of irreparable damage. Hence, they play an essential role in preventing the proliferation of damaged cells. When the tumor suppressor genes develop mutations or are lost, cells start growing out of control, leading to cancer. However, a single functional copy of the tumor suppressor gene is enough for the cells to maintain their normal functions and cell...
02:53
CRISPR and crRNAs
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2020
Bacteria and archaea are susceptible to viral infections just like eukaryotes; therefore, they have developed a unique adaptive immune system to protect themselves. Clustered regularly interspaced short palindromic repeats and CRISPR-associated proteins (CRISPR-Cas) are present in more than 45% of known bacteria and 90% of known archaea. The CRISPR-Cas system stores a copy of foreign DNA in the host genome and uses it to identify the foreign DNA upon reinfection. CRISPR-Cas has three different...
FAQs
Insertions or deletions introduced during repair can shift the gene’s reading frame, changing how its DNA sequence is interpreted. This frameshift can prevent production of the functional protein encoded by the gene. Examining the resulting cellular or developmental phenotype helps researchers associate loss of that protein with a specific biological process.
The guide RNA provides sequence-specific targeting by pairing with a complementary DNA sequence. It directs a CRISPR-associated nuclease, such as Cas9, to that location, where the nuclease makes a double-strand break. The subsequent error-prone repair creates the sequence changes used to interfere with gene function.
Removing gene function allows researchers to examine what changes when that gene is absent rather than merely observing where it is expressed. In developmental biology, the resulting phenotype can connect a gene to cell fate, tissue formation, or morphogenesis, helping test whether it contributes causally to a developmental process.
A typical experiment selects a DNA sequence within the gene, uses a guide RNA to direct the nuclease there, and relies on repair of the resulting double-strand break to generate disruptive insertions or deletions. Researchers then examine affected cells or organisms for altered developmental or cellular outcomes and relate those changes to the targeted gene.
Pooled screens allow researchers to examine the effects of targeted gene disruptions across many guide RNA-directed perturbations in a shared experimental strategy. By comparing the resulting phenotypes, investigators can identify genes associated with developmental outcomes such as cell-fate decisions, tissue formation, and morphogenesis, supporting broader functional gene discovery.
CRISPR loss-of-function studies can reveal how particular genes contribute to cell fate, tissue formation, and morphogenesis by linking targeted disruption with changes in those processes. They can also connect gene absence to disease-related phenotypes. These results help researchers evaluate causal mechanisms underlying development rather than only describing developmental patterns.