Journal of Clinical and Cellular Immunology
Open Access

Jun Thorsteinsdottir

Publications

• Research Article
  Quantitative Analysis of Liposomal Heat Shock Protein 70 (Hsp70) in the Blood of Tumor Patients Using a Novel LipHsp70 ELISA
  Author(s): Stephanie Breuninger, Janina Erl, Clemens Knape, Sophie Gunther, Ivonne Regel, Franz Rödel, Udo S Gaipl, Jun Thorsteinsdottir, Lydia Giannitrapani, Anne M Dickinson and Gabriele MulthoffStephanie Breuninger, Janina Erl, Clemens Knape, Sophie Gunther, Ivonne Regel, Franz Rödel, Udo S Gaipl, Jun Thorsteinsdottir, Lydia Giannitrapani, Anne M Dickinson and Gabriele Multhoff
  
  Elevated levels of the stress-inducible heat shock protein 70 (Hsp70) in the peripheral circulation have been reported for many tumor entities. In line with these findings we have shown that Hsp70 membrane-positive tumor cells actively release Hsp70 in exosome-like lipid vesicles. Since most commercial Hsp70 Enzyme-Linked Immunosorbent Assays (ELISAs) are not validated for the detection of liposomal Hsp70 in serum, the lipHsp70 ELISA was established using the monoclonal antibody cmHsp70.1 as a detection reagent. This antibody has been reported to recognize free and membrane-bound Hsp70 on living tumor cells. Validation of the ELISA showed a high assay precision and linearity in a concentration range of 0.36-17.4 ng/ml. A comparison of the recovery of spiked Hsp70 in buffer and serum samples revealed a significantly better recovery using the lipHsp70 .. View More»
  DOI: 10.4172/2155-9899.1000264

  Abstract PDF

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