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Table 4 Summary of Treatments to Increase Exogenous Uptake of FITC-Subtilisin

From: Fluorescent derivatization of a protease antigen to track antigen uptake and processing in human cell lines

 

Treatment

Uptake and Processing

1.

Active Subtilisin

Cell Lysis

2.

TCA-precipitated FITC-subtilisin

Uptake, no increase in processing

3.

Autolysed FITC-subtilisin

Uptake, no increase in processing

4.

FITC-subtilisin antibody conjugate

Uptake, no increase in processing

5.

FITC-subtilisin crosslinked with glutaraldehyde

Uptake, no increase in processing

6.

Carriers (BioPorter, Chariot, TAT peptide) + FITC-subtilisin

Uptake, no increase in processing

7.

Liposomes + FITC-subtilisin

Uptake, no increase in processing

8.

Alpha-2-macroglobulin + FITC-subtilisin

No increase

9.

IFN gamma + FITC-subtilisin

10–25% increase in processing

10.

Pulse 2 hr, 12 hr, 24 hr, 36 hr, 48 hr

24 hr best

11.

Antigen dose 100–900 μg/mL

100–200 μg/mL best