To this end, we will summarize the main methodologies used for sample preparation and possible methods for the separation, detection, identification, and quantification of proteins/peptides.
In order to minimize the peak broadening and increase the separation resolution, tITP was used for sample stacking and preconcentration.
For sample separation, an Acquity UPLC system equipped with Acquity BEH Shield RP18 column (100 × 2.1 mm, 1.7 μm particle size) (Waters, Milford, MA, USA) was used.
Heparinized blood sample is used for PBMC separation and culture while the clot blood samples are kept for ~30 at RT followed by centrifugation at 1500 g at RT. Sera thus recovered are transferred to clean micro-tubes in aliquots.
Heparinized blood samples used for the separation of peripheral blood mononuclear cells (PBMCs) and liver biopsy tissue specimens were obtained from patients at 4 time points: Time 1 (T1) - Initial inflammation phase: High HBV-DNA load, a high HBsAg load, and serum ALT values were no more than 5 times the upper limit of normal (normal range: 10 40 IU/L).
A gradient of A (0.5% acetic acid (high purity, LGC Promochem) in water (HPLC gradient grade, Mallinckrodt Baker B.V)) and B (0.5% acetic acid in 80% ACN (LC-MS grade, Wako) in water) with increasing organic proportion was used for peptide separation (loading of sample with 2% B; separation ramp: from 10 to 30% B within 80 min).
A gradient of A (0.5% acetic acid (high purity; LGC Promochem, Wesel, Germany) in water) and B (0.5% acetic acid in 80% acetonitrile (LC-MS grade; Wako, Germany) in water) with increasing organic proportion was used for peptide separation (loading of sample with 2% B; separation ramp: from 10 30% B within 80 min).
A capillary column model Carbowax 20 M was used for separation of the sample components.
A gradient method was used for the separation of the extracted samples: 0-25 min, 15%-40% A; 25-40 min, 40%-100% A. The elution flow rate and detection wavelength were set at 1.0 mL/min and 254 nm, respectively.
Bio-Rad Miniprotean III System (Hercules, CA, USA) was used for electrophoresis separation of the protein samples.
