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Speaker
Giulio Filippo Tarro
Foundation T. and L. de Beaumont Bonelli for Cancer Research, Italy
Biography

Giulio Tarro graduated from Medicine School, Naples University (1962). He was a Research Associate in the Division of Virology and Cancer Research at Children’s Hospital (1965-1968). He also serverd as a Assistant Professor of Research Pediatrics at Cincinnati University, Ohio. He was a Professor at Naples University (1972-1985). He was seving as a Chief in the Division of Virology (1973-2003) and Head Department Diagnostic Laboratories, (2003-2006). He received recipient of the Sbarro Health Research Organization lifetime achievement award (2010). Currently he ia a President at Foundation de Beaumont Bonelli for Cancer Research.

Abstract

Tumor liberated protein (TLP) has been previously described as a TAA (complex) present in the sera from lung cancer patients with early stage disease. Since early detection improves overall survival in lung cancer, identification of screening biomarkers for patients at risk for the development of this disease represents an important target. Starting from the peptide epitope RTNKEASI previously isolated from TLP complexes, we generated a rabbit anti-RTNKEASI serum. This antiserum detected and immunoprecipitated a 55kDa protein band in the lysate of the lung cancer cell line A549. This protein band was identified as aldehyde dehydrogenase isoform 1A1 through mass spectrometry, revealing the molecular nature of at least one component of the previously described TLP complex. Next, we screened a cohort of 29 lung cancer patients (all histologies), 17 patients with non-neoplastic lung pathologies and 9 healthy donors for the presence of serum ALDH1A1 and global serum ALDH by enzyme-linked immunosorbent assay. This analysis indicated that the presence of ALDH was highly restricted to patients with lung cancer. Interestingly, the global ALDH test detected more lung cancer patients compared to the ALDH1A1-specific test, suggesting that other ALDH isoforms might add to the sensitivity of the assay. Our data suggest that ALDH levels may therefore be evaluated as part of a marker panel for lung cancer screening. Finally, the ability of the immune system to recognize a TAA, enables the development of a vaccine approach for preventive and therapeutic application and represents a main target of this field of research.

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