Single-agent panobinostat for relapsed/refractory diffuse large B-cell lymphoma: clinical outcome and correlation with genomic data. A phase 2 study of the Fondazione Italiana Linfomi

Leuk Lymphoma. 2018 Dec;59(12):2904-2910. doi: 10.1080/10428194.2018.1452208. Epub 2018 Apr 4.

Abstract

We investigated panobinostat 40 mg three times weekly in 35 adult patients with relapsed/refractory (R/R) diffuse large B-cell lymphoma (DLBCL). Overall response rate and complete response were 17.1% and 11.4%, respectively. Median progression-free survival (PFS) and overall survival were 2.4 and 7.6 months, respectively. Calculated 12, 24 and 36 months PFS were 26%, 11% and 11%, respectively. Four patients who achieved a sustained CR, continued receiving panobinostat for an overall period of 44, 48, 50, 62 months. Thrombocytopenia grade 3 (5 patients) and 4 (24 patients) represented the main toxic effect, causing dose reduction or treatment suspension in 19 patients. Genomic analysis was unable to identify any relationship between mutations and response; TP53 mutation appeared not to impact the clinical outcome. Overall, panobinostat has a modest activity in R/R DLBCL patients, however it can induce very long lasting responses in some cases. Thrombocytopenia frequently limits the use of this agent.

Keywords: Diffuse large B-cell lymphoma; genomic; panobinostat; relapsed/refractory.

Publication types

  • Clinical Trial, Phase II
  • Multicenter Study

MeSH terms

  • Aged
  • Antineoplastic Agents / administration & dosage*
  • Antineoplastic Agents / adverse effects
  • Dose-Response Relationship, Drug
  • Drug Administration Schedule
  • Drug Resistance, Neoplasm
  • Female
  • Humans
  • Italy / epidemiology
  • Lymphoma, Large B-Cell, Diffuse / drug therapy*
  • Lymphoma, Large B-Cell, Diffuse / genetics
  • Lymphoma, Large B-Cell, Diffuse / mortality
  • Lymphoma, Large B-Cell, Diffuse / pathology
  • Male
  • Mutation
  • Neoplasm Recurrence, Local / drug therapy*
  • Neoplasm Recurrence, Local / genetics
  • Neoplasm Recurrence, Local / mortality
  • Neoplasm Recurrence, Local / pathology
  • Panobinostat / administration & dosage*
  • Panobinostat / adverse effects
  • Progression-Free Survival
  • Prospective Studies
  • Thrombocytopenia / chemically induced
  • Thrombocytopenia / epidemiology*
  • Time Factors
  • Tumor Suppressor Protein p53 / genetics

Substances

  • Antineoplastic Agents
  • TP53 protein, human
  • Tumor Suppressor Protein p53
  • Panobinostat