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Updated: Aug 16, 2026

In Vivo Immunofluorescence Localization for Assessment of Therapeutic and Diagnostic Antibody Biodistribution in Cancer Research
Published on: September 16, 2019
Anti-cancer drugs: molecular mechanisms of action
Mauro Cesar Isoldi1, Maria Aparecida Visconti, Ana Maria de Lauro Castrucci
1Department of Biology, Gilmer Hall, University of Virginia, Charlottesville, 22904-4328, USA. mauroisoldi@hotmail.com
Abstract:
Genetic alterations are responsible for all cancers. These mutations produce, in turn, alterations in key proteins of certain signaling pathways. Amongst the best known and studied alterations related to malignant transformations are those which occur in Ras protein and p53. In most cases mutations in Ras and p53 lead to the appearance of practically most malignant transformations. Mutated Ras genes exist in approximately 20 to 30% of all human cancers. Ras proteins are switches that regulate diverse functions such as cell proliferation, differentiation and apoptosis. Normal p53 expression, also known as the "genome guardian", is a key molecule for suppressing cell proliferation. The great importance of these proteins rests on their intimacy with the events leading to cell proliferation or death. The comprehension of the extent of transformation on Ras and p53, and of the diverse biochemical pathways of intracellular signaling, activated by them, is of extreme importance for the understanding of malignant transformation, as well as its control, through the creation, for example, of new drugs which contribute to the elimination of these cells. To clarify the consequences originated by transformed Ras, p53 and their biochemical interlinks in the different intracellular pathways, besides the possible intervening points and pharmacological controls presently used in combating cancer, are the aims of this review.
Insights
Cancer arises from genetic mutations affecting key proteins like Ras and p53, which control cell growth and death. Understanding these altered signaling pathways is crucial for developing targeted cancer therapies.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- Genetic mutations are the root cause of all cancers.
- Alterations in key signaling pathway proteins, notably Ras and p53, are central to malignant transformations.
- Mutations in Ras and p53 are implicated in a majority of human cancers.
Purpose of the Study:
- To elucidate the consequences of transformed Ras and p53 proteins and their biochemical interlinks in intracellular signaling pathways.
- To identify intervention points within these pathways for cancer control.
- To review current pharmacological strategies for combating cancer by targeting these pathways.
Main Methods:
- Review of scientific literature on Ras and p53 mutations and their roles in cancer.
- Analysis of intracellular signaling pathways influenced by these proteins.
- Examination of existing and potential pharmacological interventions.
Main Results:
- Ras proteins act as critical switches regulating cell proliferation, differentiation, and apoptosis.
- p53, the "genome guardian," is vital for suppressing cell proliferation.
- Mutated Ras and p53 significantly drive malignant transformation by disrupting normal cellular processes.
Conclusions:
- Comprehending the impact of Ras and p53 alterations on intracellular signaling is essential for understanding cancer.
- Targeting these pathways offers significant potential for developing novel anti-cancer drugs.
- Further research into these biochemical interlinks can lead to more effective cancer treatments.
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