6-4 PP	pyrimidine-pyrimidone (6-4) photoproducts
AK	actinic keratosis
AP-1	activator protein-1
COX-2	cyclooxygenase-2
CPD	cyclobutane pyrimidine dimer
CPDNL	nanoliposomes of CPD photolyases
ERK	extracellular signal-regulated kinase
JNK	c-Jun-N-terminal kinase
MAPK	mitogen-activated protein kinases
MDA	malondialdehyde
MMP	matrix metalloproteinase
NER	nucleotide excision repair
NF-κB	nuclear factor-κB
NMSC	non-melanoma skin cancer
PBS	phosphate-buffered saline
PDI	polydispersity index
ROS	reactive oxygen species
RSM	response surface methodology
SDS-PAGE	sodium dodecyl sulfate polyacrylamide gel electrophoresis
TNF-α	tumor necrosis factor-α
UVB	ultraviolet-B
XP	xeroderma pigmentosum