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Does "OPTINAB" strategy ("stop-and-go") work in treatment of advanced pancreatic cancer (APC) with nab-paclitaxel-gemcitabine?
Cancer Chemotherapy and Pharmacology 2017 August
BACKGROUND: MPACT demonstrated a survival benefit of nab-paclitaxel plus gemcitabine versus gemcitabine in advanced pancreatic cancer (APC). However, sensory peripheral neuropathy is a dose-limiting toxicity and neuromodulators have shown limited, if any activity in ameliorating neuropathy. In colorectal cancer, the OPTIMOX ("stop-and-go") approach offered a strategy to reduce neuropathy. No data exist to support this strategy for nab-paclitaxel in APC.
METHODS: Retrospective study of APC patients who developed grade 3 neuropathy during nab-paclitaxel plus gemcitabine was done. Nab-paclitaxel was held and then reinstituted upon radiological or tumor marker progression. Duration of disease control (DCC) was measured. We named this strategy "OPTINAB".
RESULTS: Seven patients out of 27 (25%) developed grade 3 neuropathy after an average of 4.2 months; nab-paclitaxel was suspended while gemcitabine was continued. Maintenance gemcitabine continued for a mean of 2.8 months. Upon progression (radiologic or CA19-9) nab-paclitaxel was re-instituted with gemcitabine. One patient could not tolerate nab-paclitaxel due to worsening of neuropathy while other six continued the combo with mean progression-free survival 2 (PFS2) of 2.2 months. The six patients continued nab-paclitaxel for a mean of PFS2 of 2.2 months (range 1-4 months). Nab-paclitaxel resulted in improvement of an average DDC with an average of (7.0 + 2.2 =) 8.2 months (range 8-13 months). Average overall survival for this group was 11.7 months (range 9.5-17 months). Reintroduction of nab-paclitaxel resulted in an average DDC of 9.4 months. Average overall survival (OS) for this group was 11.7 months.
CONCLUSIONS: "OPTINAB" approach improved PFS2 in these patients and was feasible as majority of the patient tolerated nab-paclitaxel. Although it is a small study, it supports the need for a randomized, prospective study to test the concept of "OPTINAB".
METHODS: Retrospective study of APC patients who developed grade 3 neuropathy during nab-paclitaxel plus gemcitabine was done. Nab-paclitaxel was held and then reinstituted upon radiological or tumor marker progression. Duration of disease control (DCC) was measured. We named this strategy "OPTINAB".
RESULTS: Seven patients out of 27 (25%) developed grade 3 neuropathy after an average of 4.2 months; nab-paclitaxel was suspended while gemcitabine was continued. Maintenance gemcitabine continued for a mean of 2.8 months. Upon progression (radiologic or CA19-9) nab-paclitaxel was re-instituted with gemcitabine. One patient could not tolerate nab-paclitaxel due to worsening of neuropathy while other six continued the combo with mean progression-free survival 2 (PFS2) of 2.2 months. The six patients continued nab-paclitaxel for a mean of PFS2 of 2.2 months (range 1-4 months). Nab-paclitaxel resulted in improvement of an average DDC with an average of (7.0 + 2.2 =) 8.2 months (range 8-13 months). Average overall survival for this group was 11.7 months (range 9.5-17 months). Reintroduction of nab-paclitaxel resulted in an average DDC of 9.4 months. Average overall survival (OS) for this group was 11.7 months.
CONCLUSIONS: "OPTINAB" approach improved PFS2 in these patients and was feasible as majority of the patient tolerated nab-paclitaxel. Although it is a small study, it supports the need for a randomized, prospective study to test the concept of "OPTINAB".
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