BACKGROUND: The interaction between CD40 ligand (CD40L) and CD40 on antigen presenting cells is essential for the initiation of antigen-specific T-cell responses, whereas CD40L stimulation of CD40+ tumor cells can induce cellular apoptosis. We investigated the anti-tumor effects induced by CD40L gene transfer into the mouse prostate adenocarcinoma cell line TRAMP-C2, both in vitro and in vivo. METHODS: TRAMP-C2 cells were transduced with an adenoviral vector encoding CD40L (AdCD40L). The induced expression of co-stimulatory molecules and cell viability was analyzed. AdCD40L-transduced TRAMP-C2 cells were used in prophylactic vaccination studies, while therapeutic studies were performed using peritumoral injections of AdCD40L. RESULTS: AdCD40L yielded reduced TRAMP-C2 cell viability and induced apoptosis in vitro. Vaccination with CD40L-expressing TRAMP-C2 cells induced anti-tumor immunity and peritumoral AdCD40L injections induced tumor growth suppression. CONCLUSIONS: Our observations highlight the therapeutic potential of using AdCD40L as a monotherapy or in combination with conventional chemotherapy or novel therapies (e.g., oncolytic viruses). The use of AdCD40L offers an attractive option for future clinical trials.
BACKGROUND: The interaction between CD40 ligand (CD40L) and CD40 on antigen presenting cells is essential for the initiation of antigen-specific T-cell responses, whereas CD40L stimulation of CD40+ tumor cells can induce cellular apoptosis. We investigated the anti-tumor effects induced by CD40L gene transfer into the mouseprostate adenocarcinoma cell line TRAMP-C2, both in vitro and in vivo. METHODS:TRAMP-C2 cells were transduced with an adenoviral vector encoding CD40L (AdCD40L). The induced expression of co-stimulatory molecules and cell viability was analyzed. AdCD40L-transduced TRAMP-C2 cells were used in prophylactic vaccination studies, while therapeutic studies were performed using peritumoral injections of AdCD40L. RESULTS:AdCD40L yielded reduced TRAMP-C2 cell viability and induced apoptosis in vitro. Vaccination with CD40L-expressing TRAMP-C2 cells induced anti-tumor immunity and peritumoral AdCD40L injections induced tumor growth suppression. CONCLUSIONS: Our observations highlight the therapeutic potential of using AdCD40L as a monotherapy or in combination with conventional chemotherapy or novel therapies (e.g., oncolytic viruses). The use of AdCD40L offers an attractive option for future clinical trials.
Authors: Angelika Danielsson; Helena Dzojic; Victoria Rashkova; Wing-Shing Cheng; Magnus Essand Journal: PLoS One Date: 2011-02-17 Impact factor: 3.240
Authors: Cynthia A Wenner; Mark R Martzen; Hailing Lu; Michael R Verneris; Hongbo Wang; Joel W Slaton Journal: Int J Oncol Date: 2011-12-12 Impact factor: 5.650
Authors: E Eriksson; R Moreno; I Milenova; L Liljenfeldt; L C Dieterich; L Christiansson; H Karlsson; G Ullenhag; S M Mangsbo; A Dimberg; R Alemany; A Loskog Journal: Gene Ther Date: 2016-12-01 Impact factor: 5.250