AUC	area under the curve
DPP-IV	dipeptidyl peptidase IV
EC	ethyl cellulose
EE	encapsulation efficiency
ELISA	enzyme-linked immunosorbent assay
ERL	Eudragit RLPO
FTIR-MS	Fourier-transform infrared micro spectroscopy
FITC	fluorescein isothiocyanate
GLP-1	glucagon-like peptide 1
HPMC	hydroxypropyl methylcellulose
Lipo	liposome
ICNP	insulin-coated nanoparticle
IPC	interpolymer complex
PEG	polyethylene glycol
PAA	polyacrylic acid
PEG-b-PLA	polyethylene glycol-block-poly lactic acid
PDI	polydispersity index
RBA	relative bioavailability
RPB	relative pharmacological bioavailability
SC	sodium cholate
SGDC	sodium glycodeoxycholate
SPC	soybean phosphatidylcholine
SRCD	Synchrotron Radiation Circular Dichroism
TEER	transepithelial electrical resistance
T1DM	type 1 Diabetes Mellitus.
TR146	human buccal carcinoma cell line model
Tmax	time to maximum concentration