quiz image

Factors Affecting Rate of Normal Cells to Malignant State Quiz

SharpestGlacier avatar
SharpestGlacier
·
·
Download

Start Quiz

Study Flashcards

Questions and Answers

Alpha-fetoprotein is synthesized and secreted in the ______, found in the cord blood, and detected in hepatomas. It is also seen in non-malignant cases such as cirrhosis and hepatitis.

liver

CA 125, a mucin-like glycoprotein, is most useful in ovarian and ______ carcinomas.

endometrial

Human Epididymis Protein 4 (HE4) is recommended for monitoring patients for recurring epithelial ovarian cancer. Disease recurrence or progression can be indicated if HE4 levels are >_150.1 pM. This marker is not specific for ovarian cancer, and is also used for other ______.

indications

Thyroglobulin (Tg) is produced and used exclusively by the ______ gland. A Tg assay is frequently ordered prior to thyroid surgery to determine whether the tumor is producing Tg.

<p>thyroid</p> Signup and view all the answers

Neutrophils have a percentage range of 60-70% in the differential white cell count. Basophils have a percentage range of 0.5-1%. Eosinophils have a percentage range of 2-4%. Monocytes have a percentage range of 3-8%. Lymphocytes have a percentage range of 20-25%. Dendritic cells initiate the ______ immune response.

<p>adaptive</p> Signup and view all the answers

Neutrophils are known for their ______ activity. Basophils produce histamine. Eosinophils are toxic to parasites and also perform ______.

<p>phagocytic</p> Signup and view all the answers

Monocytes function as ______ as mature macrophages. They are found as fixed macrophages in lungs, liver, and bronchi, and as wandering macrophages roaming tissues.

<p>phagocytic</p> Signup and view all the answers

Microbial evasion of phagocytosis includes inhibiting adherence using M protein and capsules in organisms like Streptococcus pyogenes and S.pneumoniae. Staphylococcus aureus uses leukocidins to ______ phagocytes. Listeriamonocytogenes uses membrane attack complex to ______ phagocytes.

<p>kill, lyse</p> Signup and view all the answers

Spontaneous regression is the ________ of cancer cells without any treatment

<p>disappearance</p> Signup and view all the answers

Loss of contact inhibition leads to ________ reproduction of cells

<p>perpetual</p> Signup and view all the answers

Radiation exposure is associated with specific types of cancer, such as acute leukemia, thyroid cancer, and ________

<p>sarcomas</p> Signup and view all the answers

Aerosol and industrial pollutants, drugs, infectious agents, and radiation exposure are environmental factors definitely linked with ________

<p>cancer</p> Signup and view all the answers

Lead, copper, zinc, arsenic, and cyclic aromatics are linked with lung cancer due to exposure to ________

<p>tobacco</p> Signup and view all the answers

Hepatitis B is associated with an increased risk of developing ________

<p>hepatocellular carcinoma</p> Signup and view all the answers

ERC are coated with both IgG and ______, although in some, coating with IgG alone, or less often, with complement alone.

<p>complement</p> Signup and view all the answers

Cold reactive IgM antibodies react with RBCs in the peripheral circulation when the body temp falls to 32 deg.C and binds C to the cell. This IgG autoantibody can be demonstrated by performing the donath landsteiner t.DLA (IgG directed against antigen ______).

<p>P</p> Signup and view all the answers

Autoantibody is an IgG that reacts with RBCs in colder parts of the body. At warmer temp, RBCs are destroyed and Ab elutes from the cells. As idiopathic as it has remained, an initial insult (injury) to the pulmonary vasculature is required for exposure of the alveolar capillaries to the anti-GBM antibodies. Predisposing factors for such exposure include the following: o Exposure to organic solvents e.g. ______ or hydrocarbon).

<p>chloroform</p> Signup and view all the answers

Exposure to tobacco smoke, certain gene mutations (human leukocyte antigen HLA-DR15), infection (viral), such as influenza A, cocaine inhalation, metal dust inhalation, bacteremia, sepsis, high-oxygen environments, anti-lymphocytic treatment (especially monoclonal antibodies such as ______).

<p>alemtuzumab</p> Signup and view all the answers

Study Notes

  • Differential white cell count: Neutrophils (60-70%), Basophils (0.5-1%), Eosinophils (2-4%), Monocytes (3-8%), Lymphocytes (20-25%)
  • Neutrophils: Phagocytic cells, produce histamine (Basophils) not involved, initiate adaptive immune response (Dendritic cells), phagocytic as mature macrophages
    • Fixed macrophages in lungs, liver, and bronchi
    • Wandering macrophages roam tissues
  • Lymphocytes: Involved in specific immunity
  • Phagocytosis: Ingestion of microbes or particles by a cell, performed by phagocytes
  • Microbial evasion of phagocytosis:
    • Prevent adherence: Streptococcus pyogenes, S.pneumoniae
    • Kill phagocytes: Staphylococcus aureus
    • Lyse phagocytes: Membrane attack complex (Listeriamonocytogenes)
    • Escape phagosome: Shigella
    • Prevent phagosome-lysosome fusion: HIV
    • Survive in phagolysosome: Coxiella burnetti
  • Hemolytic diseases:
    • Autoantibodies in warm AHA react with RBCs at body temperature
      • Coated with both IgG and complement
      • Elution of Ab from RBCs can demonstrate autoantibody
    • Autoantibodies in cold AHA react with RBCs in colder parts of the body
      • IgM (anti I or anti-i)
      • Cold reactive IgM antibodies bind C to the cell
    • Predisposing factors for exposure of alveolar capillaries to anti-GBM antibodies:
      • Exposure to organic solvents (e.g., chloroform or hydrocarbon)
      • Exposure to tobacco smoke
      • Certain gene mutations (human leukocyte antigen HLA-DR15)
      • Infection (viral), such as influenza A
      • Cocaine inhalation
      • Metal dust inhalation
      • Bacteremia
      • Sepsis
      • High-oxygen environments
      • Anti-lymphocytic treatment (monoclonal antibodies such as alemtuzumab)
  • Factors that affect the rate of normal cells to malignant state:
    • Dedifferentiation
    • Perpetual reproduction (tumorigenesis)
    • Loss of contact inhibition
    • Increased mitotic rate
    • Causative factors: Environmental factors (e.g., chemical and radiation) / Host factors and disease associations
  • Environmental factors linked with cancer:
    • Aerosol and industrial pollutants: Asbestos (silica), Lead, copper, zinc, arsenic, cyclic aromatics
    • Drugs: Androgenic steroids, Estrogen, Hydantoins, alkylating agents
    • Infectious agents: Epstein-Bar Virus, Human papillomavirus, Herpesvirus type 2, Hepatitis B, Kaposi’s sarcoma-associated herpesvirus (HHV-8), Human Immunodeficiency Virus (HIV), HTLV-1
    • Presence of certain genetic disorders associated with increased incidence of leukemia
  • Cancer biomarkers:
    • Selected environmental factors associated with cancer: Aerosol and industrial pollutants, Drugs, Infectious agents
    • Types of molecules: Enzyme Oncofetal proteins, Hormones, Mucins, Immunoglobulins, Genetic alterations
    • Examples of cancer biomarkers: Alpha-fetoprotein (AFP), CA 125, Human epididymis protein 4 (HE4), Thyroglobulin, Prostate-specific antigen (PSA), Carcinoembryonic antigen (CEA), CA 19-9, CA 15-3, CA 27.29, HER2/neu, Beta-hCG.

Studying That Suits You

Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

Quiz Team
Use Quizgecko on...
Browser
Browser