Terminology



 This section is constantly changing: if you do not understand a term or concept let us know and we will add it to our list!

Angiogenesis: growth of new blood vessels sprouting from existing blood vessels

Aneuploidy: an abnormal number of chromosomes.  Humans are diploid, meaning we have two sets of 23 chromosomes for a total of 46 chromosomes.  Aneuploidy is a form of genetic instability

Apoptosis:  Programmed cell death, initiated from within the cell

Autophagy:  A form of programmed cell death where the damaged organelles of the cell are recycled by the lysosome; literally means “eating self”

Carcinoma: abnormal cellular growth of epithelial cells; the most common type of cancer

Cell Proliferation: A cellular process under control of the cell cycle whereby each cell duplicates its DNA and divides into two daughter cells

Chromosome: structure that consists of long strands of DNA and its associated
Proteins

Cytokine: extracellular signal or peptide secreted by immune cells that elicit cellular response in neighbouring cell types; cytokines can include growth factors, interleukins, or interferons. 

DNA:  deoxyribonucleic acid; the genetic and hereditary information; the basic building block of life: transcription from DNA to RNA to protein

Endothelial cell: cells forming the inner lining blood vessels

Epithelial cell: make up the epithelium; arranged as sheets of cells, the epithelium is the outer layer of body tissues (organs), blood vessels, and small cavities.  

Genetic: relating to genes; interchanged with genomic

Genetic Instability: a situation characterized by a high degree of mutations that ultimately leads to further mutations

Genome: all of the genetic information of an organism or cell

Genotype: the genetic makeup of a cell or organism; translated into its phenotype

Growth Factor:  external signals that relay growth information into receptive cells.  Specific growth factors act as signals (ligands) for specific receptors on cell surfaces.  For example, epidermal growth factor (EGF) activates the epidermal growth factor receptor (EGFR) to promote proliferation.

Hereditary: genes originating from germ cells that can be passed down from parent to child

Homeostasis:  a state of balance; a non-diseased state

Metastasis: the process by which a cancer cell migrates from the primary tumor to a distant site in the body

Mitogenic: Capable of promoting growth by the induction of mitosis; proliferative protein

Mitosis: division of the nucleus of one cell into two identical daughter cells; involves the duplication and separation of chromosomes

Morphology: the structure and appearance, in particular of that of cells

Mutation: an alteration in the DNA sequence; mutations can include single nucleotide changes, frameshift mutations, or deletions and insertions

Neoplasia: abnormal cellular growth; tumor

Next generation sequencing: the encompassing phrase describing new high-throughput sequencing or nucleic acids (DNA or RNA).

Phenotype: the physical appearance of a cell or organism; related to its genotype

Phosphorylation: A specific post-translational modification that involves linking a phosphate group to a protein

Polymorphism:  variations in genes

Post-translational modification (PTM):  An enzyme-catalyzed change in a protein made after the protein is synthesized.  Examples include phosphorylation, acetylation, methylation, cleavage, or glycosylation.

Targeted therapy:  therapy involving small molecules whose action is directed against a specific protein; to alter cellular signaling dynamics

Telomere: end of a chromosome, composed of characteristic telomeric repeats which is a measure of cell life

Transcription: copying one strand of DNA into a complementary RNA strand (mRNA); under the control of RNA polymerase; the process by which genes are converted to proteins

Transcription factor: any protein involved in regulating (initiating, inhibiting) transcription

Translation: the process of converting mRNA into proteins

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