Cancer Flashcards
What is cancer?
Cells that have acquired the ability to multiply and spread without the usual biologic restraints.
This unregulated growth is caused by damage to DNAresulting in mutations to genes that control cell
division.
Cancer: Celluar characteristics
- Damange to DNA and Mitochondria
- Increased activity of chemokines, cytokines and hormones
- Activation oncogenes.
Cancer Cells: Altered functions
- Limitless replication
- Evade apoptosis
- Angiogenesis
- Metastasise
Cancer Stages
Stage I: Only local tissue involvement.
Stage II: Spread to some surrounding tissues and perhaps to nearby lymph nodes.
Stage III: Metastasised to distant lymph nodes.
Stage IV: Spread to distant organs or other parts of the body.
Cancer terminology
- In situ: Abnormal cells are present in the layer of cells in which they originated.
- Localised: Cancer is limited to the organ in which it began, no evidence of spread.
- Regional: Cancer has spread beyond the primary site to nearby lymph nodes or tissues and organs.
- Distant: Cancer has spread from the primary site to distant tissues or organs or to distant lymph nodes.
Oncogenes
- Oncogenes are genes that code for one of the typical behaviours of cancer cells: growth, non-responsiveness to stop signals, failure of apoptosis, invasion, metastasis.
- Oncogenes become active:
– By a mutation that makes them constitutively active (may be inherited). BRCA1
– By epigenetic modifications such that a gene which is normally silenced becomes active (usually due to loss of methylation marks).
Lifestyle Cancers: Diet
Gastric
Colon
Breast
Pancreas
Lifestyle cancer: Obesity
Colon
Gastric
Breast
Pancreas
Lifestyle Cancers: Genetic
Breast: BRCA1/2
Prostate
Colorectal
Cancer causing: Virus/Bacteria
Epstein-Barr Virus: lymphoma
HPV: Cervical
Hepatitis B Virus: Hepatocellular carcinomas (Liver)
HIV: lymphoma
Retro Virus: Adult T-Cell leukaemia
Helicobacter Pylori: Gastric cancer
Cancer Support Goals: Primary
- Support allopathic treatment.
- Reduce side effects of those treatments.
- Support overall wellness.
Cancer Support Goals: Secondary
- Support immunity.
- Reduce tumour-promoting factors.
- Inhibit metastasis and tumour progression.
- Promote appropriate apoptosis.
Dietary Cancer Promoters
Damaged fats
Excess protein
Excess calories
Excess sugar
Omega 6:3 ration >6:1
Dietary Cancer - Protection
High fibre
Adequate protein
Adequate calories
Whole plant foods
Omega 6:3 ratio - 2:1
Physical activity
Cancer: Progression Promoters
- Excess & damaged fat: Creates lipid peroxides
- Excess protein: Increases IGF-1
- Excess omega 6: Inflammation
Can create new cancer cells - Aflatoxins (mould)
- Heterocyclic amines (high temp meat)
- N-nitroso compounds (cured meat)
- Polycyclic aromatic hydrocarbons (smoked foods)