Abstract: |
Purpose: To establish the utility of serum Type III procollagen N-terminal propeptide (PIIINP) in predicting pulmonary toxicity (pulm tox) during chemotherapy (chemo) for lung cancer. Methods: A prospective study of serum PIIINP levels during induction Mitomycin (M), vinblastine (V), and cisplatin(P) chemo in patients (pts) with advanced non-small cell lung cancer (NSCLC). Serial serum samples from 16 pts during treatment (tx) were analyzed by radioimmunoassay for PIIINP. Pulm tox was prospectively defined. Results: Pts were divided into 3 groups based on the PIIINP levels. Group I (9 pts) had normal (nl) baseline PIIINP values which increased to abnormal levels during treatment. In 7/9 pts in this group, the rise in PIIINP was observed prior to clinical signs of pulm tox. Group II (6 pts) had elevated baseline PIIINP levels and all except 1 pt had Stage IV disease. 5/6 pts in Group II had further increases in their PIIINP levels during tx; the rise preceded the development of pulm tox in 4/5. Group III (1 pt) had nl PIIINP levels throughout and no evidence of pulm tox. 69% of pts met the criteria for pulm tox. 8 of 8 pts treated with systemic corticosteroids improved. Conclusions: An increase in serum PIIINP is a sensitive predictor for the development of MVP-induced pulm tox. Clinical Implications: Serum PIIINP measurements can identify NSCLC pts at risk for pulm tox with MVP tx. |