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Related Concept Videos

Biological Effects of Radiation02:59

Biological Effects of Radiation

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All radioactive nuclides emit high-energy particles or electromagnetic waves. When this radiation encounters living cells, it can cause heating, break chemical bonds, or ionize molecules. The most serious biological damage results when these radioactive emissions fragment or ionize molecules. For example, α and β particles emitted from nuclear decay reactions possess much higher energies than ordinary chemical bond energies. When these particles strike and penetrate matter, they...
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Cancer therapies are various modes of treatment, such as surgery, radiation therapy, and chemotherapy that are administered to cancer patients.
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Mutations01:35

Mutations

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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.
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Isotopes and Radioisotopes01:28

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In the early 1900s, English chemist Frederick Soddy realized that an element could have atoms with different masses that were chemically indistinguishable. These different types are called isotopes — atoms of the same element that differ in mass. Isotopes differ in mass because they have different numbers of neutrons but are chemically identical because they have the same number of protons. Soddy was awarded the Nobel Prize in Chemistry in 1921 for this discovery.
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The targeted cancer therapies, also known as “molecular targeted therapies,” take advantage of the molecular and genetic differences between the cancer cells and the normal cells. It needs a thorough understanding of the cancer cells to develop drugs that can target specific molecular aspects that drive the growth, progression, and spread of cancer cells without affecting the growth and survival of other normal cells in the body.
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Effects of Radiotherapy in Normal Tissue.

Deborah E Citrin1, Robert D Timmerman2,3

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Radiotherapy advances improve cancer treatment and reduce side effects. Ongoing research into radiation

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Area of Science:

  • Oncology
  • Radiation Oncology
  • Cancer Biology

Background:

  • Radiotherapy is a cornerstone of cancer treatment, evolving with technological advancements.
  • Modern techniques offer conformal and ablative treatments, enhancing tumor control and patient safety.
  • Radiotherapy is increasingly combined with systemic therapies like targeted treatments and immunotherapies.

Purpose of the Study:

  • To review the advancements in radiotherapy and their impact on cancer treatment efficacy and side effect profiles.
  • To explore the biological mechanisms underlying normal tissue responses to radiation.
  • To highlight the potential of personalized approaches in optimizing radiotherapy outcomes.

Main Methods:

  • Review of current literature on radiotherapy advancements.
  • Analysis of biological mechanisms of radiation-induced normal tissue damage.
  • Discussion of emerging biomarkers and personalized treatment strategies.

Main Results:

  • Technological progress in imaging, planning, and delivery has led to more precise radiotherapy.
  • Improved tumor control is achievable with no increase, or even a decrease, in side effects.
  • Understanding radiation's effects on normal tissues (stem cell senescence, inflammation, etc.) is crucial.

Conclusions:

  • Further research into the biology of radiation effects and biomarkers promises to enhance radiotherapy efficacy.
  • Personalized approaches hold the key to improving treatment outcomes and minimizing side effects.
  • Continued innovation in radiotherapy aims to further increase its effectiveness and improve patient quality of life.