Abstract:
:The sensitivity of human tissues and tumors to infection with type C adenoviruses correlates with the expression of the human coxsackie B- and adenovirus receptor, hCAR. HCAR is heterogeneously expressed in various tissues and types of human cancer cells, which has implications for the use of adenoviruses as vectors in cancer gene therapy. Using immunoblotting, real-time PCR, FACS-analysis and sensitivity to infection with adenovirus-lacZ, we analyzed the expression level of hCAR in glioma Grade IV cell lines. With real-time PCR, we also analyzed hCAR expression in primary human astrocytomas of different malignancy grades, as well as in their xenograft derivatives. Analysis of a set of 10 cell lines showed great variation in hCAR expression. Susceptibility to Ad5lacZ correlated well with hCAR expression, whereas no correlation was observed with the expression of alphavbeta3/alphavbeta5 integrins, proposed to function as co-receptors for adenoviruses. A great variation of CAR expression was also observed in primary astrocytomas of different malignancy grades. The mean value of CAR expression was significantly lower in 22 Grade IV tumors as compared to the values for 6 Grade II (p = 0.01) and 6 Grade III (p = 0.01) tumors. When the hCAR expression in 11 xenografts derived from Grade IV gliomas were compared to the levels detected in the original parental tumors, a mean 12-fold higher expression was seen in the xenografts (P = 0.01). Two xenografts with low hCAR expression grew considerably faster than the hCAR-expressing cells. Our results have relevance for the use of adenoviruses in gene therapy against astrocytomas.
journal_name
Int J Cancerjournal_title
International journal of cancerauthors
Fuxe J,Liu L,Malin S,Philipson L,Collins VP,Pettersson RFdoi
10.1002/ijc.10891keywords:
subject
Has Abstractpub_date
2003-03-01 00:00:00pages
723-9issue
6eissn
0020-7136issn
1097-0215journal_volume
103pub_type
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