Related Experiment Video
Updated: Feb 10, 2026
06:24
Oncogene Expression Analysis with Alterations in pH in a Pancreatic Ductal Cell Line
Published on: April 11, 2025
946
[Oncogene expression and point mutation in human pancreatic adenocarcinomas]
Summary
Oncogene expression, including c-myc and c-Ki-ras, was absent in normal pancreatic tissue but present in pancreatic cancer cell lines. A high prevalence (82.4%) of c-Ki-ras gene mutations was found in pancreatic adenocarcinoma.
Area of Science:
- Molecular biology
- Oncology
- Genetics
Context:
- Pancreatic cancer is a deadly disease with limited treatment options.
- Understanding the molecular mechanisms driving pancreatic cancer is crucial for developing targeted therapies.
Purpose:
- To investigate the expression of specific oncogenes in normal pancreatic tissue and pancreatic adenocarcinoma.
- To identify the frequency of c-Ki-ras gene point mutations in pancreatic adenocarcinoma specimens.
Summary:
- Oncogene expression analysis using nucleic acid hybridization and PCR revealed that c-myc and c-Ki-ras oncogenes were expressed in all four human pancreatic adenocarcinoma cell lines studied.
- In contrast, none of the five oncogenes examined were expressed in normal human pancreatic tissue.
- Furthermore, analysis of 34 surgical specimens of pancreatic adenocarcinoma indicated that 82.4% (28 out of 34 cases) harbored a point mutation in codon 12 of the c-Ki-ras gene.
Impact:
- These findings highlight the significant role of c-myc and c-Ki-ras oncogenes in pancreatic adenocarcinoma development.
- The high frequency of c-Ki-ras mutations suggests its potential as a therapeutic target for pancreatic cancer.
- This research provides valuable insights into the molecular pathology of pancreatic cancer, paving the way for improved diagnostic and therapeutic strategies.
Related Concept Videos
01:30Point and Frameshift Mutations
1.2K
Point mutations are genetic alterations involving the change of a single nucleotide base pair in DNA. Depending on how the alteration affects protein synthesis, they can lead to various consequences.Point mutations fall into the following types:Silent mutations occur when a nucleotide change does not alter the amino acid sequence due to the redundancy of the genetic code. For instance, changing ACC to ACA still encodes threonine, leaving the protein function unaffected. This occurs because...
1.2K
01:39Mutations
94.6K
Overview
94.6K
01:35Mutations
44.6K
Mutations are changes in the sequence of DNA. These changes can occur spontaneously or they can be induced by exposure to environmental factors. Mutations can be characterized in a number of different ways: whether and how they alter the amino acid sequence of the protein, whether they occur over a small or large area of DNA, and whether they occur in somatic cells or germline cells.
Chromosomal Alterations Are Large-Scale Mutations
While point mutations are changes in a single nucleotide in...
Chromosomal Alterations Are Large-Scale Mutations
While point mutations are changes in a single nucleotide in...
44.6K
00:36Viral Mutations
39.9K
A mutation is a change in the sequence of bases of DNA or RNA in a genome. Some mutations occur during replication of the genome due to errors made by the polymerase enzymes that replicate DNA or RNA. Unlike DNA polymerase, RNA polymerase is prone to errors because it is not capable of “proofreading” its work. Viruses with RNA-based genomes, like HIV, therefore accrue mutations faster than viruses with DNA-based genomes. Because mutation and recombination provide the raw material...
39.9K
01:33Cancer-Critical Genes I: Proto-oncogenes
11.5K
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...
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...
11.5K
01:09Mutation, Gene Flow, and Genetic Drift
64.5K
In a population that is not at Hardy-Weinberg equilibrium, the frequency of alleles changes over time. Therefore, any deviations from the five conditions of Hardy-Weinberg equilibrium can alter the genetic variation of a given population. Conditions that change the genetic variability of a population include mutations, natural selection, non-random mating, gene flow, and genetic drift (small population size).
64.5K