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Related Concept Videos

Mutations01:35

Mutations

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...
Mutations01:39

Mutations

Overview
Pulmonary Tuberculosis I01:29

Pulmonary Tuberculosis I

Tuberculosis, often called TB, is a contagious illness primarily caused by Mycobacterium tuberculosis. It mainly affects the lung parenchyma but can also impact other body parts.
Causative Organism
The primary infectious agent causing tuberculosis is Mycobacterium tuberculosis, a slow-growing, acid-fast, aerobic rod that exhibits sensitivity to heat and ultraviolet light. Instances of Mycobacterium bovis and Mycobacterium avium contributing to the development of TB infection are rare.
Mode of...
Immunodeficiency Diseases01:25

Immunodeficiency Diseases

Immunodeficiency disorders are conditions in which the immune system's ability to fight infectious disease and cancer is compromised or entirely absent. The immune system comprises a complex network of cells, tissues, and organs that work together to protect the body from potentially harmful invaders. When this system is deficient or not functioning properly, it leaves the body susceptible to infections, diseases, or other complications.
There are three main causes of immunodeficiency disorders...
Skin Cancer01:30

Skin Cancer

Skin cancer is a type of cancer that occurs when there is an abnormal growth of skin cells, usually triggered by damage to the DNA within the skin cells. It is primarily caused by exposure to ultraviolet (UV) radiation from the sun or artificial sources like tanning beds. Skin cancer is the most common type of cancer worldwide, and its incidence continues to rise.
Basal Cell Carcinoma (BCC): BCC is the most common type of skin cancer, accounting for about 80% of cases. It typically develops in...
Tumor Immunotherapy01:27

Tumor Immunotherapy

Immunotherapy is a treatment that boosts or manipulates the immune system to fight diseases, including cancer. For instance, by stimulating an immune response through vaccinations against viruses that cause cancers, like hepatitis B virus and human papillomavirus, these diseases can be prevented. Nonetheless, some cancer cells can avoid the immune system due to their rapid mutation and division. The immune response to many cancers involves three phases: elimination, equilibrium, and escape.

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Related Experiment Video

Updated: Jun 20, 2026

Studying Chronic Exposure of Mice to Ultraviolet B Radiation
03:20

Studying Chronic Exposure of Mice to Ultraviolet B Radiation

Published on: August 19, 2025

Ultraviolet radiation and immunosuppression.

G M Murphy1

  • 1Department of Dermatology, Beaumont & Mater Misericordiae Hospital, Dublin, Ireland. gmurphyoffice@eircom.net

The British Journal of Dermatology
|September 25, 2009
PubMed
Summary
This summary is machine-generated.

Ultraviolet (UV) radiation causes cancer by damaging skin DNA and weakening immune surveillance. Immunosuppressive drugs used in organ transplant recipients significantly increase UV radiation

Related Experiment Videos

Last Updated: Jun 20, 2026

Studying Chronic Exposure of Mice to Ultraviolet B Radiation
03:20

Studying Chronic Exposure of Mice to Ultraviolet B Radiation

Published on: August 19, 2025

Area of Science:

  • Dermatology
  • Oncology
  • Immunology

Background:

  • Ultraviolet (UV) radiation is a known carcinogen.
  • UV radiation induces DNA damage and suppresses immune surveillance in the skin.
  • Organ transplant recipients often require immunosuppressive drugs.

Purpose of the Study:

  • To review the mechanisms by which UV radiation causes cancer.
  • To examine the synergistic effect of immunosuppressive drugs on UV carcinogenicity in transplant patients.

Main Methods:

  • Literature review of existing studies on UV radiation, skin cancer, and immunosuppression.
  • Analysis of the molecular pathways involved in UV-induced DNA damage and immune suppression.
  • Examination of clinical data on skin cancer incidence in organ transplant recipients.

Main Results:

  • UV radiation directly damages cellular DNA, leading to mutations.
  • UV radiation suppresses local immune surveillance, hindering the elimination of cancerous cells.
  • Immunosuppressive drugs exacerbate UV-induced carcinogenicity by further impairing immune responses.

Conclusions:

  • UV radiation is a complete carcinogen with dual mechanisms of action.
  • The use of immunosuppressive drugs in organ transplant recipients significantly elevates their risk of UV-induced skin cancer.
  • Understanding these mechanisms is crucial for developing preventative strategies and managing skin cancer risk in this vulnerable population.