Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

Transcription profiling by array of human SK-N-AS neuroblastoma xenograft tumor treated with anti-human IGF-IR monoclonal antibody (h10H5) to study the anti-tumour function of the antibody

ABSTRACT: The insulin-like growth factor (IGF) system consists of two ligands (IGF-I and IGF-II), which both signal through type I IGF receptor (IGF-IR) to stimulate proliferation and inhibit apoptosis, with activity contributing to malignant growth of many types of human cancers. We have developed a humanized, affinity-matured anti-human IGF-IR monoclonal antibody (h10H5), which binds with high affinity and specificity to the extracellular domain. h10H5 inhibits IGF-IR-mediated signaling by blocking IGF-I and IGF-IIbinding and by inducing cell surface receptor down-regulation via internalization and degradation. In vitro, h10H5 exhibits anti-proliferative effects on cancer cell lines. In vivo, h10H5 demonstrates single-agent anti-tumor efficacy in human SK-N-AS neuroblastoma and SW527 breast cancer xenograft models, and even greater efficacy in combination with the chemotherapeutic agent Docetaxel or an anti-VEGF antibody. Anti-tumor activity of h10H5 is associated with decreased AKT activation and glucose uptake, and a 316-gene transcription profile with significant changes involving DNA metabolic and cell cycle machineries. These data support the clinical testing of h10H5 as a biotherapeutic for IGF-IR-dependent human tumors. Experiment Overall Design: Two treatment groups with four tumor samples per group are collected and analyzed,

ORGANISM(S): Homo sapiens

SUBMITTER: Jerry Tang

PROVIDER: E-GEOD-11959 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Antixenograft tumor activity of a humanized anti-insulin-like growth factor-I receptor monoclonal antibody is associated with decreased AKT activation and glucose uptake.

Shang Yonglei Y Mao Yifan Y Batson Jennifer J Scales Suzie J SJ Phillips Gail G Lackner Mark R MR Totpal Klara K Williams Simon S Yang Jihong J Tang Zhijun Z Modrusan Zora Z Tan Christine C Liang Wei-Ching WC Tsai Siao Ping SP Vanderbilt Alexander A Kozuka Kenji K Hoeflich Klaus K Tien Janet J Ross Sarajane S Li Congfen C Lee Sang Hoon SH Song An A Wu Yan Y Stephan Jean-Philippe JP Ashkenazi Avi A Zha Jiping J

Molecular cancer therapeutics 20080901 9

The insulin-like growth factor (IGF) system consists of two ligands (IGF-I and IGF-II), which both signal through IGF-I receptor (IGF-IR) to stimulate proliferation and inhibit apoptosis, with activity contributing to malignant growth of many types of human cancers. We have developed a humanized, affinity-matured anti-human IGF-IR monoclonal antibody (h10H5), which binds with high affinity and specificity to the extracellular domain. h10H5 inhibits IGF-IR-mediated signaling by blocking IGF-I and ...[more]

PMID: 18790743

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Project description:Insulin-like growth factor receptor-1 (IGF-1R) inhibition could be a relevant therapeutic approach in small cell lung cancer (SCLC) given the importance of an IGF-1R autocrine loop and its role in DNA damage repair processes. We assessed IGF-1R and pAkt protein expression in 83 SCLC human specimens. The efficacy of R1507 (a monoclonal antibody directed against IGF-1R) alone or combined with cisplatin or ionizing radiation (IR) was evaluated in H69, H146 and H526 cells in vitro and in vivo. Innovative genomic and functional approaches were conducted to analyze the molecular behavior under the different treatment conditions. A total of 53% and 37% of human specimens expressed IGF-1R and pAkt, respectively. R1507 demonstrated single agent activity in H146 and H526 cells but not in H69 cells. R1507 exhibited synergistic effects with both Cisplatin and IR in vitro. The triple combination R1507-Cisplatin-IR led to a dramatic delay in tumor growth compared to Cisplatin-IR in H526 cells. Analyzing the apparent absence of antitumoral effect of R1507 alone in vivo, we observed a transient reduction of IGF-1R staining intensity in vivo, concomitant to the activation of multiple cell surface receptors and intracellular proteins involved in proliferation, angiogenesis and survival. Finally, we identified that the nucleotide excision repair pathway (NER) was mediated after exposure to R1507-CDDP and R1507-IR in vitro and in vivo. In conclusion, adding R1507 to the current standard Cisplatin-IR doublet reveals remarkable chemo- and radiosensitizing effects in selected SCLC models and warrants to be investigated in the clinical setting. We used microarrays to investigate the effect of IGF-1R targetting on the global gene expression. Gene expression data from H526 xenografts under various treatment and time conditions Total mRNA from 33 NCI-H526 SCLC (small-cell lung cancer) xenografts was hybridized to Affymetrix HGU133 Plus 2.0 expression arrays. Log2 gene expression values were calculated using RMA. (A) To identify the molecular mechanisms involved in the response to R1507 alone along the treatment time, we performed global gene expression profiling in H526 xenografts at the following time points: baseline (vehicle), R1507 day 1 and R1507 day 7. (B) To identify the molecular mechanisms involved in the response to CDDP- and IR-R1507 combinations, we performed global gene expression profiling on mice bearing H526 xenografts treated with the following treatment conditions: vehicle, R1507 CDDP, IR, CDDP-R1507 and IR-R1507.

Dataset Information

Transcription profiling by array of human SK-N-AS neuroblastoma xenograft tumor treated with anti-human IGF-IR monoclonal antibody (h10H5) to study the anti-tumour function of the antibody

Publications

Antixenograft tumor activity of a humanized anti-insulin-like growth factor-I receptor monoclonal antibody is associated with decreased AKT activation and glucose uptake.

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