Author
Jacques Piette
Bio: Jacques Piette is an academic researcher from Catholic University of Leuven. The author has contributed to research in topics: Cancer & Kinase. The author has an hindex of 2, co-authored 2 publications receiving 4224 citations.
Topics: Cancer, Kinase, Apoptosis, Photodynamic therapy, Programmed cell death
Papers
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TL;DR: The combination of PDT with pyridinyl imidazole inhibitors of p38 MAPK may improve the therapeutic efficacy of PDT by blocking COX-2 up-regulation, which contributes to tumor growth by the release of growth- and pro-angiogenic factors, as well as by sensitizing cancer cells to apoptosis.
134 citations
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TL;DR: Photodynamic therapy uses non-toxic photosensitizers and harmless visible light in combination with oxygen to produce cytotoxic reactive oxygen species that kill malignant cells by apoptosis and/or necrosis, shut down the tumour microvasculature and stimulate the host immune system.
Abstract: Photodynamic therapy (PDT) uses non-toxic photosensitizers and harmless visible light in combination with oxygen to produce cytotoxic reactive oxygen species that kill malignant cells by apoptosis and/or necrosis, shut down the tumour microvasculature and stimulate the host immune system. In contrast to surgery, radiotherapy and chemotherapy that are mostly immunosuppressive, PDT causes acute inflammation, expression of heat-shock proteins, invasion and infiltration of the tumour by leukocytes, and might increase the presentation of tumour-derived antigens to T cells.
2,150 citations
TL;DR: The role of endoplasmic reticulum (ER) stress and reactive oxygen species (ROS) in regulating the immunogenicity of dying cancer cells and the effect of therapy-resistant cancer microevolution on ICD are discussed.
Abstract: Although it was thought that apoptotic cells, when rapidly phagocytosed, underwent a silent death that did not trigger an immune response, in recent years a new concept of immunogenic cell death (ICD) has emerged. The immunogenic characteristics of ICD are mainly mediated by damage-associated molecular patterns (DAMPs), which include surface-exposed calreticulin (CRT), secreted ATP and released high mobility group protein B1 (HMGB1). Most DAMPs can be recognized by pattern recognition receptors (PRRs). In this Review, we discuss the role of endoplasmic reticulum (ER) stress and reactive oxygen species (ROS) in regulating the immunogenicity of dying cancer cells and the effect of therapy-resistant cancer microevolution on ICD.
1,736 citations
University College London1, Francis Crick Institute2, Natera3, University of Leicester4, Brigham and Women's Hospital5, Harvard University6, Institute of Cancer Research7, The Royal Marsden NHS Foundation Trust8, University of Manchester9, University of Birmingham10, University of Aberdeen11, Glenfield Hospital12, Middlesex University13, Royal Free Hospital14, Princess Alexandra Hospital15, Royal Surrey County Hospital16, Ashford University17, Cardiff University18, University Hospital of Wales19, Whittington Hospital20, Semmelweis University21, Technical University of Denmark22, Boston Children's Hospital23, Max Delbrück Center for Molecular Medicine24, Katholieke Universiteit Leuven25
TL;DR: It is shown that phylogenetic ct DNA profiling tracks the subclonal nature of lung cancer relapse and metastasis, providing a new approach for ctDNA-driven therapeutic studies.
Abstract: The early detection of relapse following primary surgery for non-small-cell lung cancer and the characterization of emerging subclones, which seed metastatic sites, might offer new therapeutic approaches for limiting tumour recurrence. The ability to track the evolutionary dynamics of early-stage lung cancer non-invasively in circulating tumour DNA (ctDNA) has not yet been demonstrated. Here we use a tumour-specific phylogenetic approach to profile the ctDNA of the first 100 TRACERx (Tracking Non-Small-Cell Lung Cancer Evolution Through Therapy (Rx)) study participants, including one patient who was also recruited to the PEACE (Posthumous Evaluation of Advanced Cancer Environment) post-mortem study. We identify independent predictors of ctDNA release and analyse the tumour-volume detection limit. Through blinded profiling of postoperative plasma, we observe evidence of adjuvant chemotherapy resistance and identify patients who are very likely to experience recurrence of their lung cancer. Finally, we show that phylogenetic ctDNA profiling tracks the subclonal nature of lung cancer relapse and metastasis, providing a new approach for ctDNA-driven therapeutic studies.
1,179 citations
TL;DR: This document and the conference recommendations it includes builds upon prior literature, the National Consensus Project Guidelines, and the National Quality Forum Preferred Practices and Conference proceedings.
Abstract: A Consensus Conference sponsored by the Archstone Foundation of Long Beach, California, was held February 17–18, 2009, in Pasadena, California. The Conference was based on the belief that spiritual care is a fundamental component of quality palliative care. This document and the conference recommendations it includes builds upon prior literature, the National Consensus Project Guidelines, and the National Quality Forum Preferred Practices and Conference proceedings.
1,114 citations
TL;DR: Analysis of whole-exome sequencing data of metastatic biopsies from patients observed substantial genomic overlap between castration-resistant tumors that were histologically characterized as prostate adenocarcinomas and neuroendocrine prostate cancer (CRPC-NE), supporting the emergence of an alternative, 'AR-indifferent' cell state through divergent clonal evolution as a mechanism of treatment resistance in advanced prostate cancer.
Abstract: An increasingly recognized resistance mechanism to androgen receptor (AR)-directed therapy in prostate cancer involves epithelial plasticity, in which tumor cells demonstrate low to absent AR expression and often have neuroendocrine features. The etiology and molecular basis for this 'alternative' treatment-resistant cell state remain incompletely understood. Here, by analyzing whole-exome sequencing data of metastatic biopsies from patients, we observed substantial genomic overlap between castration-resistant tumors that were histologically characterized as prostate adenocarcinomas (CRPC-Adeno) and neuroendocrine prostate cancer (CRPC-NE); analysis of biopsy samples from the same individuals over time points to a model most consistent with divergent clonal evolution. Genome-wide DNA methylation analysis revealed marked epigenetic differences between CRPC-NE tumors and CRPC-Adeno, and also designated samples of CRPC-Adeno with clinical features of AR independence as CRPC-NE, suggesting that epigenetic modifiers may play a role in the induction and/or maintenance of this treatment-resistant state. This study supports the emergence of an alternative, 'AR-indifferent' cell state through divergent clonal evolution as a mechanism of treatment resistance in advanced prostate cancer.
1,095 citations