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Molecular biology

Equipment

  • Bacterial culture: thermo-regulated rotating incubators, centrifuges
  • DNA/RNA analysis: apparatus for DNA/RNA/protein purification; agarose and acrylamide electrophoresis; digital picture acquisition, quantitative analysis software
  • PCR amplification: PCR apparatus, PCR hood
  • Protein analysis: 1D and mini-2D Western Blot analysis, DotBlot, ELISA, FACS
  • Miscellaneous: Stratalinker, sonication disruptor, mixer mill disruptor
  • Analysis: Spectrometer, Fluorometer, Luminometer

Experiments performed by the laboratory

To observe : Quantify gene and protein expression.
  • RT/PCR analysis (RNA expression by semi-quantitative and quantitative methods, sequence specific amplification, sensitive detection, optimization of methodology
  • WB analysis: semi-quantitative methods, optimization of methodology
To modify : Modify gene and protein expression.
  • cDNA isolation
  • Mutagenesis
  • Constitutive or inducible expression
  • Cellular cloning (lipofectant transfection of siRNA and shRNA)
To characterize : Use functional assays to observe molecular action.
  • Molecular assays : immunoprecipitation, gel shifts and Dot Blot
  • Cellular assays : GENE reporter

Aim of these experiments in drug development

    To observe, to modify and to characterize gene and protein expression.

Gene expression and target validation = to observe

  • Evaluation of expression in a panel of cultured cell lines and grafted or primary tumors
  • Evaluation of gene or protein expression after in vitro or in vivo treatment
  • Detection of organ invasion by tumor cells
  • Evaluation of antibody specificity
  • Biomarker follow-up

Structure-function studies = to modify

  • Transient or stable over-expression of wild-type or mutated proteins in constitutive or inducible systems
  • Decrease of expression by RNA interference: RNAse III siRNA, synthetic siRNA and plasmidic shRNA(constitutive or inducible)

Interaction studies = to characterize

  • Immunoprecipitation (Tag or specific antibodies)
  • Gel-shift, filter binding assay, Dot Blot, GENE reporter
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