TY - JOUR
T1 - Expression of a single-chain Fv antibody fragment specific for the hepatitis B surface antigen in transgenic tobacco plants
AU - Ram, Nadia
AU - Ayala, Marta
AU - Lorenzo, Damaryst
AU - Palenzuela, Daniel
AU - Herrera, Lissett
AU - Doreste, Vivian
AU - Pérez, Marlene
AU - Gavilondo, Jorge V.
AU - Oramas, Pedro
PY - 2002
Y1 - 2002
N2 - An anti-Hepatitis B virus surface antigen (HBsAg) single chain Fv (scFv) antibody fragment was expressed in Nicotiana tabacum transgenic plants. The 6-histidine tagged scFv was targeted to either the cytosol, apoplast, and vacuole, or for retention in the endoplasmic reticulum. Expression of active scFv was detected by ELISA in fresh leaf material from F1 transgenic plant lines representative of the genetic constructs targeting the antibody fragment to the apoplastic fluid (AF-12, 0.031% of the total soluble protein), vacuole (V-20, 0.032% of the total soluble protein), and endoplasmic reticulum (ER-52, 0.22% of the total soluble protein). No scFv was detected by ELISA or western blot in the plants transformed with the cytosol construct. The biologically active scFv was easily purified (to 94-95% purity) from ER-52 and AF-12 plant material using immobilized metal ion affinity chromatography. Recovery estimated from the ER-52 plant line indicates that 15-20 μg of pure active scFv can be obtained per gram of fresh leaf material, on a laboratory scale.
AB - An anti-Hepatitis B virus surface antigen (HBsAg) single chain Fv (scFv) antibody fragment was expressed in Nicotiana tabacum transgenic plants. The 6-histidine tagged scFv was targeted to either the cytosol, apoplast, and vacuole, or for retention in the endoplasmic reticulum. Expression of active scFv was detected by ELISA in fresh leaf material from F1 transgenic plant lines representative of the genetic constructs targeting the antibody fragment to the apoplastic fluid (AF-12, 0.031% of the total soluble protein), vacuole (V-20, 0.032% of the total soluble protein), and endoplasmic reticulum (ER-52, 0.22% of the total soluble protein). No scFv was detected by ELISA or western blot in the plants transformed with the cytosol construct. The biologically active scFv was easily purified (to 94-95% purity) from ER-52 and AF-12 plant material using immobilized metal ion affinity chromatography. Recovery estimated from the ER-52 plant line indicates that 15-20 μg of pure active scFv can be obtained per gram of fresh leaf material, on a laboratory scale.
KW - HBsAg
KW - ScFv antibody fragments
KW - Transgenic tobacco
UR - http://www.scopus.com/inward/record.url?scp=0036008335&partnerID=8YFLogxK
U2 - 10.1023/A:1013967705337
DO - 10.1023/A:1013967705337
M3 - Artículo
C2 - 11874103
AN - SCOPUS:0036008335
SN - 0962-8819
VL - 11
SP - 61
EP - 64
JO - Transgenic Research
JF - Transgenic Research
IS - 1
ER -