The Role of DNA Viruses in Human Cancer

Zohreh-Al-Sadat Ghoreshi1, Hamid Reza Molaei2, Nasir Arefinia1

  • 1Student Research Committee, Jiroft University of Medical Sciences, Jiroft, Iran.

Cancer Informatics
|June 26, 2023
PubMed

Insights

Virus infections cause 15-20% of human cancers by manipulating cellular pathways. Viral oncoproteins interact with deubiquitinases (DUBs), impacting cell stability and promoting cancer development, including HPV-linked and Hepatitis B-associated malignancies.

Area of Science:

  • Oncology
  • Virology
  • Molecular Biology

Background:

  • Infections are linked to a significant portion of human cancers.
  • Viral infections contribute 15-20% of all cancer cases globally.
  • DNA viruses encode proteins that interfere with host cellular signaling.

Purpose of the Study:

  • To review the role of virus infections in human cancers.
  • To explore the mechanisms by which viral oncoproteins contribute to cancer development.
  • To highlight specific viruses and their associated malignancies.

Main Methods:

  • Literature review of studies on virus-associated cancers.
  • Analysis of molecular interactions between viral oncoproteins and host cellular machinery.
  • Compilation of data on prevalence and types of virus-linked cancers.

Main Results:

  • Viral oncoproteins interact with host Deubiquitinases (DUBs) to enhance stability and signaling.
  • This interaction promotes uncontrolled cell proliferation, inhibits cell death, and disrupts genomic integrity.
  • Specific examples include Human Papillomaviruses (cervical, oral cancers), Hepatitis B (HCC), and Epstein-Barr virus (lymphomas, nasopharyngeal carcinoma).

Conclusions:

  • Virus infections are a major etiological factor in a substantial percentage of human cancers.
  • Understanding viral oncoprotein interactions with DUBs is crucial for developing targeted cancer therapies.
  • Targeting these viral-host interactions could offer new strategies for cancer prevention and treatment.

Related Concept Videos

Mechanisms of Retrovirus-induced Cancers01:51

Mechanisms of Retrovirus-induced Cancers

Retroviruses are RNA viruses that have been shown to cause cancers in diverse species, including chickens, mice, cats, and monkeys. The RNA genomes of these viruses are first reverse-transcribed into single and then double-stranded DNA (dsDNA) copies. This dsDNA called proviral DNA then integrates into the host genome. Subsequently, the host cell transcribes the proviral DNA in concert with the chromosomal DNA. This leads to the production of viral RNA and proteins that assemble at the host...
5.1K
Rous Sarcoma Virus (RSV) and Cancer01:03

Rous Sarcoma Virus (RSV) and Cancer

Rous Sarcoma virus or RSV was discovered by F. Peyton Rous in the year 1911 as a filterable transmissible agent that could cause tumors in chickens. He won a Nobel Prize for this discovery in 1966. His experiments clearly demonstrated that some cancers could be caused by infectious agents and led to the discovery of many more cancer-causing viruses in animals as well as humans.
RSV is a retrovirus that contains two copies of a plus-strand  RNA genome. Its genome consists of four main open...
5.1K
Cancer Prevention02:59

Cancer Prevention

Several factors can increase the risk of cancer in an individual. About 50% of cancer cases can be prevented by adopting a healthy lifestyle, regular exercise, eating healthy, and following a modest cancer prevention diet. Epidemiological studies have consistently shown that populations with vegetable and fruit-rich diets have reduced the incidence of cancer. On the other hand, populations who have a diet rich in animal fat, red meat, junk food, or high calories are predisposed to cancer.
Some...
6.2K
Size and Structure of Viral Genomes01:26

Size and Structure of Viral Genomes

Viral genomes exhibit remarkable diversity in size, structure, and composition, influencing their replication strategies and interactions with host cells. These genomes consist of either DNA or RNA and may be linear or circular. Additionally, they can be single-stranded or double-stranded, with each configuration affecting how the virus propagates within a host. RNA viruses, for instance, generally have smaller genomes than DNA viruses, a factor that contributes to their high mutation rates and...
67
Viral Mutations00:36

Viral Mutations

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...
32.5K
DNA Helicases00:55

DNA Helicases

DNA unwinding helicase enzymes are a type of motor protein. Motor proteins can translocate along filaments or polymers using energy generated from ATP hydrolysis. Helicases are involved in all the important cellular processes where DNA unwinding is required, such as DNA replication, repair, recombination, and transcription. They are present in all living organisms, but vary in their structure, function, and mechanism of action. For example, in prokaryotes, DnaB helicase binds and translocates...
21.6K