title: Recombinant Newcastle Disease Virus Encoding IL-12 and/or IL-2 as Potential Candidate for Hepatoma Carcinoma Therapy.
abstract: Interleukins as immunomodulators are promising therapeutic agents for cancer therapy. Previous studies showed that there was an improved antitumor immunity in tumor-bearing mice using recombinant Newcastle disease virus carrying for interleukin-2. Interleukin-12 is a promising antitumor cytokine too. So we investigated and compared the antitumor effect of genetically engineered Newcastle disease virus strains expressing both interleukin-12 and/or interleukin-2 (rClone30-interleukin-2, rClone30-interleukin-12, and rClone30-interleukin-12-interleukin-2). In vitro studies showed that rClone30s could efficiently infect tumor cells and express interleukin-12 and/or interleukin-2. 3-(4,5-Dimethylthiazol-2-y)-2,5-diphenyl-tetrazolium bromide results showed rClone30s possessed strong cytotoxic activities against multiple tumor cell lines (U251, HepG2, A549, and Hela). Animal studies showed that rClone30-interleukin-12-interleukin-2 was more effective in inhibition of murine hepatoma carcinoma tumors, with the mean tumor volume (day 14) of 141.70 mm(3) comparing 165.67 mm(3) of rClone30-interleukin-12 group, 210.47 mm(3) of rClone30-interleukin-2 group, 574.70 mm(3) of rClone30 group, and 1206.83 mm(3) of phosphate-buffered saline group. Moreover, the rClone30-interleukin-12-interleukin-2 treated mice secreted more interferon γ (333.518 pg/mL) and its downstream cytokine interferon-γ induced protein 10 (16.006 pg/mL) in tumor than the rClone30-interleukin-12 group (interferon γ: 257.548 pg/mL; interferon-γ induced protein 10: 13.601 pg/mL), rClone30-interleukin2 group (interferon γ: 124.601 pg/mL; interferon-γ induced protein 10: 9.779 pg/mL), or rClone30 group (interferon γ: 48.630 pg/mL; interferon-γ induced protein 10:1.650 pg/mL). For the survival study, rClone30-interleukin12-interleukin2 increased the survival rate (12 of 16) of the tumor-bearing mice versus 11 of 16 in rClone30-interleukin-12 group, 10 of 16 in rClone30-interleukin-2 group, 7 of 16 in Clone30 group, and 0/16 in phosphate-buffered saline group, respectively. To determine whether the mice treated with recombinant virus developed protective immune response, the mice were rechallenged with the same tumor cells. The results showed that viral-treated mice were significantly protected from rechallenge. These results suggest that expressing both interleukin-2 and/or interleukin-12 could be ideal approaches to enhance the antitumor ability of Newcastle disease virus, and rClone30-interleukin-12-interleukin-2 is slightly superior over rClone30-interleukin-12 and rClone30-interleukin-2 alone.
authors: College of Life Science, Northeast Agricultural University, Xiangfang District, Harbin, China Key Laboratory of Agricultural Biological Functional Gene, Northeast Agricultural University, Harbin, China.
authors: Guiping
authors: G
authors: Ren
authors: College of Life Science, Northeast Agricultural University, Xiangfang District, Harbin, China.
authors: Guiyou
authors: G
authors: Tian
authors: College of Life Science, Northeast Agricultural University, Xiangfang District, Harbin, China.
authors: Yunye
authors: Y
authors: Liu
authors: College of Life Science, Northeast Agricultural University, Xiangfang District, Harbin, China.
authors: Jinjiao
authors: J
authors: He
authors: College of Life Science, Northeast Agricultural University, Xiangfang District, Harbin, China.
authors: Xinyu
authors: X
authors: Gao
authors: College of Life Science, Northeast Agricultural University, Xiangfang District, Harbin, China.
authors: Yinhang
authors: Y
authors: Yu
authors: College of Life Science, Northeast Agricultural University, Xiangfang District, Harbin, China.
authors: Xin
authors: X
authors: Liu
authors: College of Life Science, Northeast Agricultural University, Xiangfang District, Harbin, China.
authors: Xu
authors: X
authors: Zhang
authors: College of Life Science, Northeast Agricultural University, Xiangfang District, Harbin, China.
authors: Tian
authors: T
authors: Sun
authors: College of Life Science, Northeast Agricultural University, Xiangfang District, Harbin, China.
authors: Shuangqing
authors: S
authors: Liu
authors: College of Life Science, Northeast Agricultural University, Xiangfang District, Harbin, China.
authors: Jiechao
authors: J
authors: Yin
authors: College of Life Science, Northeast Agricultural University, Xiangfang District, Harbin, China Key Laboratory of Agricultural Biological Functional Gene, Northeast Agricultural University, Harbin, China deshanli@163.com.
authors: Deshan
authors: D
authors: Li
mesh_terms: D000818:Animals; D006528:Carcinoma, Hepatocellular / Q000235:genetics / Q000473:pathology / Q000628:therapy; D045744:Cell Line, Tumor; D016207:Cytokines / Q000235:genetics / Q000378:metabolism; D004195:Disease Models, Animal; D015870:Gene Expression; D023061:Gene Order; D015316:Genetic Therapy; D005822:Genetic Vectors / Q000008:administration & dosage / Q000235:genetics*; D006801:Humans; D007376:Interleukin-2 / Q000235:genetics*; D008113:Liver Neoplasms / Q000235:genetics* / Q000401:mortality / Q000473:pathology* / Q000628:therapy; D051379:Mice; D009522:Newcastle disease virus / Q000235:genetics*; D050130:Oncolytic Virotherapy; D014161:Transduction, Genetic; D047368:Tumor Burden
chemical_list: D016207:Cytokines; D007376:Interleukin-2
keywords: IL-12; IL-2; antitumor immunity; combination interleukins; rClone30; virotherapy