Endostatin gene therapy enhances the efficacy of IL-2 in suppressing metastatic renal cell carcinoma in mice


Autoria(s): ROCHA, Flavia Gomes de Goes; CHAVES, Karen Cristina Barbosa; CHAMMAS, Roger; PERON, Jean Pierre Schatzmann; RIZZO, Luiz Vicente; SCHOR, Nestor; BELLINI, Maria Helena
Contribuinte(s)

UNIVERSIDADE DE SÃO PAULO

Data(s)

19/10/2012

19/10/2012

2010

Resumo

We investigated whether the administration of IL-2 combined with endostatin gene therapy was able to produce additive or even synergistic immunomodulatory activity in a mouse model of metastatic renal carcinoma. Renca cells were injected into the tail vein of BALB/c mice. After 24 h, the animals were randomly divided into four groups (5 mice/group). One group of mice was the control, the second group received treatment with 100,000 UI of Recombinant IL-2 (Proleukin, Chiron) twice a day, 1 day per week during 2 weeks (IL-2), the third group received treatment with a subcutaneous inoculation of 3.6 x 10(6) endostatin-producing cells, and the fourth group received both therapies (IL-2 + ES). Mice were treated for 2 weeks. In the survival studies, 10 mice/group daily, mice were monitored daily until they died. The presence of metastases led to a twofold increase in endostatin levels. Subcutaneous inoculation of NIH/3T3-LendSN cells resulted in a 2.75 and 2.78-fold increase in endostatin levels in the ES and IL-2 + ES group, respectively. At the end of the study, there was a significant decrease in lung wet weight, lung nodules area, and microvascular area (MVA) in all treated groups compared with the control group (P < 0.001). The significant difference in lung wet weight and lung nodules area between groups IL-2 and IL-2 + ES revealed a synergistic antitumor effect of the combined treatment (P < 0.05). The IL-2 + ES therapy Kaplan-Meier survival curves showed that the probability of survival was significantly higher for mice treated with the combined therapy (log-rank test, P = 0.0028). Conjugated therapy caused an increase in the infiltration of CD4, CD8 and CD49b lymphocytes. An increase in the amount of CD8 cells (P < 0.01) was observed when animals received both ES and IL-2, suggesting an additive effect of ES over IL-2 treatment. A synergistic effect of ES on the infiltration of CD4 (P < 0.001) and CD49b cells (P < 0.01) was also observed over the effect of IL-2. Here, we show that ES led to an increase in CD4 T helper cells as well as cytotoxic lymphocytes, such as NK cells and CD8 cells, within tumors of IL-2 treated mice. This means that ES plays a role in supporting the actions of T cells.

FAPESP[2007/54253-6]

Identificador

CANCER IMMUNOLOGY IMMUNOTHERAPY, v.59, n.9, p.1357-1365, 2010

0340-7004

http://producao.usp.br/handle/BDPI/21890

10.1007/s00262-010-0865-6

http://dx.doi.org/10.1007/s00262-010-0865-6

Idioma(s)

eng

Publicador

SPRINGER

Relação

Cancer Immunology Immunotherapy

Direitos

restrictedAccess

Copyright SPRINGER

Palavras-Chave #Gene therapy #Renal cancer #Endostatin #IL-2 #TUMOR-GROWTH #IN-VIVO #ANGIOGENESIS INHIBITORS #ANTIANGIOGENIC THERAPY #EXPERIMENTAL-DESIGN #DOSE INTERLEUKIN-2 #INTERFERON-ALPHA #LUNG METASTASES #CANCER #IMMUNOTHERAPY #Oncology #Immunology
Tipo

article

original article

publishedVersion