Al-Mehdi- Lung Cancer Flashcards
polycystic aromatic hydrocarbons (benzopyrene) + DNA adducts + _____ mutations= lung cancer
tumor suppressors
tobacco smokae + DNA adducts + _____ = DNA strand breaks
ROS
glutamine addiction of cancer cells to DNA methylation is what reprogramming
metabolic reprogramming
hereditary mutation in DNA repair genes
genomic instability
_____downregulation → less antigen presentation → less recognition of tumor cells by CD8+ cells
MHC1
_____loss of heterozygosity(LOH; loss of one functional allele; two hit hypothesis)→ progression from adenocarcinoma in situ to lung adenocarcinoma (NSCLC)
HLA
develops from pulmonary neuroendocrine cells
SCLC
____ in TP53, KRAS,EGFR,BRAF, histone methylation enzymes, and DNA damage response genes can lead to cancer
mutations
epithelial to ______ transition can lead to cancer
mesenchymal
(area of development to cancer) still confined to basement membrane but the can invade and that will be invasive carcinoma
carcinoma in situ
tumor suppressor genes hypermethylated in _______
NSCLC
cells express high levels of telomerase to avoid replicative senescence
cancer cells
uncontrolled growth of gastrin-releasing peptide is seen in what
SCLC
hepatocyte growth factor increase seen in what
NSCLC
upregulation of EGFR seen in what
NSCLC
cancer cells secrete _____ to form new blood vessels
VEGF
monoclonal anti-VEGF Ab used to treat NSCLC
BEVACIZUMAB
normoxia, pyruvate to lactate 85% of time!!!! Happens under aerobic conditions (this can suppress the growth of neighboring normal cells; tumor cells can grow under acidic environment)
cancer cells
with cancer, what kills a patient
metastasis
cells poised to undergo ____, then recruit reactive stroma and transition to cancer stem like state, and can turn into cancer stem cell w/ metastatic potential
epithelial to mesenchymal transition (EMT)
how cancer metastasizes
get into blood vessel or lymphatic vessel, travel to distant sites, colonize and form new tumor
2 main types of NSCLC
adenocarcinoma
SCC
central lung carcinomas
SCC and SCLC
KRAS mutation, woman and nonsmoker
adenocarcinoma
central location
smoker
PTHrP (hypercalcemia)
SCC
peripheral location
pleormorphic
poor prognosis
15% of bronchogenic carcinomas
large cell lung carcinoma
central location
arises from Kulchitsky cells (neuroendocrine cells)
MYC activation
SCLC
anti-neuron
SIADH
ACTH (cushing)
paraneoplastic syndromes associated with what
SCLC