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Summary Toxicology Lecture 8 $3.19
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  2.  
  3. Vrije Universiteit Amsterdam (VU)
  4.  
  5. Microbiology and Toxicology

Summary

Summary Toxicology Lecture 8
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  • Course
  • Microbiology and Toxicology
  • Institution
  • Vrije Universiteit Amsterdam (VU)
  • Book
  • Brock Biology of Microorganisms, Global Edition

Orderly and clear summary of lecture 8 what is discussed during the toxicology lectures. With this summary you will save a lot of time. I passed this course with a 7,5. Good luck :)

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  • Yes
  • December 7, 2020
  • 3
  • 2019/2020
  • Summary

Subjects

  • biomedical sciences
  • biomedical sciences
  • microbiology
  • toxicology

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  • Bachelor Biomedical Sciences
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Content preview

Toxicology 08 – Chemical carcinogenesis
Short introduction to cancer
Cancer; collective name for diseases
Characterized; unlimited cell division (proliferation)
• Concentrated; tumor, mass
• Diffuse; leukemia, no mass

Tumor;

• Benign (goedaardige tumor). Risk is that it can block
vessels and surrounding tissues, and risk that is will grow
out to malign tumor.
o Encapsulated, differentiated cells (cells that have
normal features), slow growth
• Malign (kwaadaardige tumor)
o Dedifferentiated cells, invasive (penetrate
(binnendringen) the surrounding tissues), metastasis
(uitzwaaingen)

Risk factors for cancer;
• Genetic factors
• Environmental factors;
o Food; fat (-), alcohol (-), anti-oxidants (+), vitamins (+)
o Radiation
o Compounds other than food; smoking
o Fibers
o Viruses
• Hormonal and reproduction factors;
o Pregnancy at later age
o Contraceptives? (voorbehoudsmiddelen)
o Number of sexual contacts

Multistage process
• Initiation; change in DNA (mutation) → pre-neoplasmic cells
• Promotion; dedifferentiation of cells, increased in proliferation → tumor cells
• Progression; invasion (binnendringen omliggende weefsels) and metastasis
(uitzaaingen) → malignant tumor

Each phase can be influence by;

• Compounds (chemical carcinogenesis)
o Initiation; mutagens
o Promotion; tumor promotors
o Progression; tumor progressors
• Other factors
o Initiation; viruses, radiation
o Promotion; endogenous hormones
o Progression; spontaneous mutations

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