Since efficient transfer of foreign genes into primary articular chondrocytes (CC) is difficult, a VSV.G pseudotyped retroviral vector (bullet) was developed for marker and growth factor gene transfer. Transduction efficiency, BMP2 expression, cell proliferation and matrix synthesis were analysed in the following. After initial transduction rates of more than 90% in ATDC5 cells and CC, expression of marker genes remained constantly high over the time (ATDC5: 52 weeks 94,7±0,6%; CC: 15 weeks 75,7±14,2%). The growth factor gene BMP2 was expressed and led to a considerable increase in proliferation rate, proteoglycan and alkaline phosphatase production. The described retroviral vector system achieved high initial transduction rates in ATDC5 cells and CC. Gene transfer was very stable over the time period analysed, rendering it a useful tool for future in vitro and in vivo studies on cartilage remodelling.
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Since efficient transfer of foreign genes into primary articular chondrocytes (CC) is difficult, a VSV.G pseudotyped retroviral vector (bullet) was developed for marker and growth factor gene transfer. Transduction efficiency, BMP2 expression, cell proliferation and matrix synthesis were analysed in the following. After initial transduction rates of more than 90% in ATDC5 cells and CC, expression of marker genes remained constantly high over the time (ATDC5: 52 weeks 94,7±0,6%; CC: 15 weeks 75,...
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