PMID- 14729603 OWN - NLM STAT- MEDLINE DCOM- 20040401 LR - 20191108 IS - 0008-5472 (Print) IS - 0008-5472 (Linking) VI - 64 IP - 1 DP - 2004 Jan 1 TI - Cathepsin B mediates caspase-independent cell death induced by microtubule stabilizing agents in non-small cell lung cancer cells. PG - 27-30 AB - We have previously reported that the microtubule stabilizing agents (MSAs) paclitaxel, epothilone B and discodermolide induce caspase-independent cell death in non-small cell lung cancer (NSCLC) cells. Here we present two lines of evidence indicating a central role for the lysosomal protease cathepsin B in mediating cell death. First, inhibition of cathepsin B, and not of caspases or other proteases, such as cathepsin D or calpains, results in a strong protection against drug-induced cell death in several NSCLC cells. Second, MSAs trigger disruption of lysosomes and release and activation of cathepsin B. Interestingly, inhibition of cathepsin B prevents the appearance of multinucleated cells, an early characteristic of MSA-induced cell death, pointing to a central, proximal role for cathepsin B in this novel cell death pathway. FAU - Broker, Linda E AU - Broker LE AD - Department of Medical Oncology, VU University Medical Center, Amsterdam, the Netherlands. FAU - Huisman, Cynthia AU - Huisman C FAU - Span, Simone W AU - Span SW FAU - Rodriguez, Jose A AU - Rodriguez JA FAU - Kruyt, Frank A E AU - Kruyt FA FAU - Giaccone, Giuseppe AU - Giaccone G LA - eng PT - Journal Article PL - United States TA - Cancer Res JT - Cancer research JID - 2984705R RN - 0 (Alkanes) RN - 0 (Antineoplastic Agents) RN - 0 (Carbamates) RN - 0 (DNA Primers) RN - 0 (Epothilones) RN - 0 (Lactones) RN - 0 (Pyrones) RN - DHG59994DN (discodermolide) RN - EC 3.4.22.- (Caspases) RN - EC 3.4.22.1 (Cathepsin B) RN - P88XT4IS4D (Paclitaxel) RN - UEC0H0URSE (epothilone B) SB - IM MH - Alkanes/toxicity MH - Antineoplastic Agents/*toxicity MH - Apoptosis/*drug effects MH - Base Sequence MH - Carbamates/toxicity MH - Carcinoma, Non-Small-Cell Lung MH - Caspases/*metabolism MH - Cathepsin B/*metabolism MH - Cell Death MH - DNA Primers MH - Epothilones/toxicity MH - Humans MH - Lactones/toxicity MH - Lung Neoplasms MH - Lysosomes/drug effects/enzymology MH - Microscopy, Fluorescence MH - Microtubules/drug effects/*physiology MH - Paclitaxel/*toxicity MH - Pyrones MH - Transfection MH - Tumor Cells, Cultured EDAT- 2004/01/20 05:00 MHDA- 2004/04/02 05:00 CRDT- 2004/01/20 05:00 PHST- 2004/01/20 05:00 [pubmed] PHST- 2004/04/02 05:00 [medline] PHST- 2004/01/20 05:00 [entrez] AID - 10.1158/0008-5472.can-03-3060 [doi] PST - ppublish SO - Cancer Res. 2004 Jan 1;64(1):27-30. doi: 10.1158/0008-5472.can-03-3060.