Related Experiment Video

Updated: Aug 8, 2026

Induction and Diagnosis of Tumors in Drosophila Imaginal Disc Epithelia
08:14

Induction and Diagnosis of Tumors in Drosophila Imaginal Disc Epithelia

Published on: July 25, 2017

Development of a cancer DNA phenotype prior to tumor formation

Donald C Malins1, Katie M Anderson, Naomi K Gilman

  • 1Biochemical Oncology Program, Pacific Northwest Research Institute, 720 Broadway, Seattle, WA 98122, USA. dmalins@pnri.org

Proceedings of the National Academy of Sciences of the United States of America
|July 14, 2004
PubMed

Insights

Fourier transform-infrared spectroscopy revealed a cancer DNA phenotype preceding tumors in mice treated with 3-methylcholanthrene (MCA). Cyclophosphamide inhibited this phenotype, delaying tumor formation, suggesting a promising early cancer detection method.

Area of Science:

  • Molecular Biology
  • Biochemistry
  • Cancer Research

Background:

  • Carcinogen exposure can induce DNA alterations.
  • Early detection of cancer phenotypes is crucial for effective intervention.
  • Fourier transform-infrared spectroscopy (FTIR) offers a method for analyzing molecular structures.

Purpose of the Study:

  • To investigate the development of a cancer DNA phenotype using FTIR.
  • To assess the effect of cyclophosphamide on the cancer DNA phenotype and tumor formation.
  • To establish FTIR-detected DNA changes as an early indicator of carcinogenesis.

Main Methods:

  • Mice were injected with the carcinogen 3-methylcholanthrene (MCA).
  • DNA structural changes were analyzed using Fourier transform-infrared spectroscopy (FTIR).
  • The impact of cyclophosphamide co-administration on DNA phenotype and tumor development was evaluated.

Main Results:

  • MCA induced significant structural changes in DNA, evident as a 34% spectral difference between control and treated mice.
  • A distinct cancer DNA phenotype was detected 57 days before tumor appearance, even in histologically normal tissues.
  • Cyclophosphamide treatment inhibited the cancer DNA phenotype and delayed tumor formation.

Conclusions:

  • A cancer DNA phenotype, detectable by FTIR, emerges early in carcinogenesis.
  • FTIR analysis of DNA structure shows promise as an early diagnostic marker for tumor formation.
  • Inhibiting the cancer DNA phenotype may represent a strategy to delay or prevent cancer development.

More Related Videos

Testing Targeted Therapies in Cancer using Structural DNA Alteration Analysis and Patient-Derived Xenografts10:27

Testing Targeted Therapies in Cancer using Structural DNA Alteration Analysis and Patient-Derived Xenografts

Published on: July 25, 2020

Detection of Cell-Free DNA in Blood Plasma Samples of Cancer Patients08:25

Detection of Cell-Free DNA in Blood Plasma Samples of Cancer Patients

Published on: September 9, 2020

Related Concept Videos

Cancers Originate from Somatic Mutations in a Single Cell02:21

Cancers Originate from Somatic Mutations in a Single Cell

Cancer arises from mutations in the critical genes that allow healthy cells to escape cell cycle regulation and acquire the ability to proliferate indefinitely. Though originating from a single mutation event in one of the originator cells, cancer progresses when the mutant cell lines continue to gain more and more mutations, and finally, become malignant. For example, chronic myelogenous leukemia (CML) develops initially as a non-lethal increase in white blood cells, which progressively...
Tumor Progression02:07

Tumor Progression

Tumor progression is a phenomenon where the pre-formed tumor acquires successive mutations to become clinically more aggressive and malignant. In the 1950s, Foulds first described the stepwise progression of cancer cells through successive stages.
Colon cancer is one of the best-documented examples of tumor progression. Early mutation in the APC gene in colon cells causes a small growth on the colon wall called a polyp. With time, this polyp grows into a benign, pre-cancerous tumor. Further...
Cancer-Critical Genes I: Proto-oncogenes01:33

Cancer-Critical Genes I: Proto-oncogenes

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...
Cancers Originate from Somatic Mutations in a Single Cell02:21

Cancers Originate from Somatic Mutations in a Single Cell

Cancer arises from mutations in the critical genes that allow healthy cells to escape cell cycle regulation and acquire the ability to proliferate indefinitely. Though originating from a single mutation event in one of the originator cells, cancer progresses when the mutant cell lines continue to gain more and more mutations, and finally, become malignant. For example, chronic myelogenous leukemia (CML) develops initially as a non-lethal increase in white blood cells, which progressively...
Tumor Progression02:07

Tumor Progression

Tumor progression is a phenomenon where the pre-formed tumor acquires successive mutations to become clinically more aggressive and malignant. In the 1950s, Foulds first described the stepwise progression of cancer cells through successive stages.
Colon cancer is one of the best-documented examples of tumor progression. Early mutation in the APC gene in colon cells causes a small growth on the colon wall called a polyp. With time, this polyp grows into a benign, pre-cancerous tumor. Further...
Cancer-Critical Genes I: Proto-oncogenes01:33

Cancer-Critical Genes I: Proto-oncogenes

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...