@article{930ce9538cd84bf1b4a60aac98837a6b,
title = "NALP3 inflammasome upregulation and CASP1 cleavage of the glucocorticoid receptor cause glucocorticoid resistance in leukemia cells",
abstract = "Glucocorticoids are universally used in the treatment of acute lymphoblastic leukemia (ALL), and resistance to glucocorticoids in leukemia cells confers poor prognosis. To elucidate mechanisms of glucocorticoid resistance, we determined the prednisolone sensitivity of primary leukemia cells from 444 patients newly diagnosed with ALL and found significantly higher expression of CASP1 (encoding caspase 1) and its activator NLRP3 in glucocorticoid-resistant leukemia cells, resulting from significantly lower somatic methylation of the CASP1 and NLRP3 promoters. Overexpression of CASP1 resulted in cleavage of the glucocorticoid receptor, diminished the glucocorticoid-induced transcriptional response and increased glucocorticoid resistance. Knockdown or inhibition of CASP1 significantly increased glucocorticoid receptor levels and mitigated glucocorticoid resistance in CASP1-overexpressing ALL. Our findings establish a new mechanism by which the NLRP3-CASP1 inflammasome modulates cellular levels of the glucocorticoid receptor and diminishes cell sensitivity to glucocorticoids. The broad impact on the glucocorticoid transcriptional response suggests that this mechanism could also modify glucocorticoid effects in other diseases. ",
keywords = "Adolescent, Antineoplastic Agents, Hormonal/pharmacology, Base Sequence, Carrier Proteins/metabolism, Caspase 1/metabolism, Child, Child, Preschool, DNA Methylation, Drug Resistance, Neoplasm, Drug Screening Assays, Antitumor, Gene Expression Regulation, Leukemic, HEK293 Cells, Humans, Infant, Infant, Newborn, Inflammasomes/metabolism, NLR Family, Pyrin Domain-Containing 3 Protein, Neoplasm Recurrence, Local/enzymology, Precursor Cell Lymphoblastic Leukemia-Lymphoma/drug therapy, Prednisolone/pharmacology, Proteolysis, Receptors, Glucocorticoid/metabolism, Transcription, Genetic, Tumor Cells, Cultured, Up-Regulation",
author = "Paugh, {Steven W} and Bonten, {Erik J} and Daniel Savic and Ramsey, {Laura B} and Thierfelder, {William E} and Prajwal Gurung and Malireddi, {R K Subbarao} and Marcelo Actis and Anand Mayasundari and Jaeki Min and Coss, {David R} and Laudermilk, {Lucas T} and Panetta, {John C} and McCorkle, {J Robert} and Yiping Fan and Crews, {Kristine R} and Gabriele Stocco and Wilkinson, {Mark R} and Ferreira, {Antonio M} and Cheng Cheng and Wenjian Yang and Karol, {Seth E} and Fernandez, {Christian A} and Barthelemy Diouf and Colton Smith and Hicks, {J Kevin} and Alessandra Zanut and Audrey Giordanengo and Daniel Crona and Bianchi, {Joy J} and Linda Holmfeldt and Mullighan, {Charles G} and {den Boer}, {Monique L} and Rob Pieters and Sima Jeha and Dunwell, {Thomas L} and Farida Latif and Deepa Bhojwani and Carroll, {William L} and Ching-Hon Pui and Myers, {Richard M} and Guy, {R Kiplin} and Thirumala-Devi Kanneganti and Relling, {Mary V} and Evans, {William E}",
note = "Publisher Copyright: {\textcopyright} 2015 Nature America, Inc. All rights reserved.",
year = "2015",
month = jun,
doi = "10.1038/ng.3283",
language = "English",
volume = "47",
pages = "607--14",
journal = "Nature Genetics",
issn = "1061-4036",
publisher = "Nature Research",
number = "6",
}