Oncotarget

Research Papers:

This article has been corrected. Correction in: Oncotarget. 2018; 9:29537.

Circulating and tumor-associated caspase-4: a novel diagnostic and prognostic biomarker for non-small cell lung cancer

Michela Terlizzi, Chiara Colarusso, Ilaria De Rosa, Nicolina De Rosa, Pasquale Somma, Carlo Curcio, Alessandro Sanduzzi, Pietro Micheli, Antonio Molino, Antonello Saccomanno, Rosario Salvi, Rita P. Aquino, Aldo Pinto and Rosalinda Sorrentino _

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Oncotarget. 2018; 9:19356-19367. https://doi.org/10.18632/oncotarget.25049

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Abstract

Michela Terlizzi1, Chiara Colarusso1,5, Ilaria De Rosa2, Nicolina De Rosa2, Pasquale Somma2, Carlo Curcio3, Alessandro Sanduzzi4, Pietro Micheli2, Antonio Molino4, Antonello Saccomanno1, Rosario Salvi3, Rita P. Aquino1, Aldo Pinto1 and Rosalinda Sorrentino1

1Department of Pharmacy, University of Salerno, ImmunePharma S.r.l., Fisciano, SA, Italy

2Anatomy and Pathology Unit, Ospedale dei Colli, AORN, “Monaldi”, Naples, Italy

3Thoracic Surgery Unit, Ospedale dei Colli, AORN, “Monaldi”, Naples, Italy

4Department of Respiratory Medicine, Respiratory Division, University of Naples Federico II, Fisciano, SA, Italy

5PhD Program in Drug Discovery and Development, Department of Pharmacy, University of Salerno, Fisciano, SA, Italy

Correspondence to:

Rosalinda Sorrentino, email: rsorrentino@unisa.it

Keywords: non-small cell lung cancer; NSCLC; diagnosis; prognosis; biomarker

Received: February 27, 2018     Accepted: March 17, 2018     Published: April 10, 2018

ABSTRACT

Late diagnosis limits therapeutic options and survival rate of non-small cell lung cancer (NSCLC) patients. Therefore the identification of biomarkers represents an emerging medical need.

A highly sensitive and specific test was developed to identify/quantify a novel/selective diagnostic biomarker for NSCLC patients, caspase-4. This test was validated by using i) plasma from 125 NSCLC patients and 79 healthy (non-pathological) subjects, ii) plasma from 139 smokers and iii) from 70 chronic-obstructive pulmonary disease (COPD) patients. Caspase-4 quantification was also assessed in the lung tumor mass of 98 paired NSCLC patients compared to 10 non-tumor lung tissues (i.e. tuberculosis).

Circulating caspase-4 was detected in both healthy and NSCLC patients; however at different range values: 2.603–3.372 ng/ml for NSCLC patients (95% CI) compared to 0.3994-0.6219 ng/ml for healthy subjects (95% CI). The sensitivity of the test ranged from 97.07% to 100%; the specificity was 88.1% with a positive predictive value of 92.54%, accuracy of 95.19% and AUC of 0.971. Smokers (95% CI, 0.3947–0.6197 ng/ml) and COPD patients (95% CI, 1.703–2.995 ng/ml) showed intermediate values of circulating caspase-4. Tissue levels of caspase-4 in the tumor mass showed that 72 (72.7%) out of 99 patients were positive. More importantly, higher levels (cut-off value = 0.307 ng/ml) of caspase-4 in the tumor mass were associated to reduced overall survival (median 0.92 years) compared to NSCLC patients with lower levels (median 3.02 years).

We report for the first time caspase-4 as a novel diagnostic and prognostic biomarker, opening new therapeutic perspectives for NSCLC patients.


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