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Agalakova NI. Chloroquine and Chemotherapeutic Compounds in Experimental Cancer Treatment. Int J Mol Sci 2024; 25:945. [PMID: 38256019 PMCID: PMC10815352 DOI: 10.3390/ijms25020945] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Revised: 01/03/2024] [Accepted: 01/09/2024] [Indexed: 01/24/2024] Open
Abstract
Chloroquine (CQ) and its derivate hydroxychloroquine (HCQ), the compounds with recognized ability to suppress autophagy, have been tested in experimental works and in clinical trials as adjuvant therapy for the treatment of tumors of different origin to increase the efficacy of cytotoxic agents. Such a strategy can be effective in overcoming the resistance of cancer cells to standard chemotherapy or anti-angiogenic therapy. This review presents the results of the combined application of CQ/HCQ with conventional chemotherapy drugs (doxorubicin, paclitaxel, platinum-based compounds, gemcitabine, tyrosine kinases and PI3K/Akt/mTOR inhibitors, and other agents) for the treatment of different malignancies obtained in experiments on cultured cancer cells, animal xenografts models, and in a few clinical trials. The effects of such an approach on the viability of cancer cells or tumor growth, as well as autophagy-dependent and -independent molecular mechanisms underlying cellular responses of cancer cells to CQ/HCQ, are summarized. Although the majority of experimental in vitro and in vivo studies have shown that CQ/HCQ can effectively sensitize cancer cells to cytotoxic agents and increase the potential of chemotherapy, the results of clinical trials are often inconsistent. Nevertheless, the pharmacological suppression of autophagy remains a promising tool for increasing the efficacy of standard chemotherapy, and the development of more specific inhibitors is required.
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Affiliation(s)
- Natalia I Agalakova
- Sechenov Institute of Evolutionary Physiology and Biochemistry, Russian Academy of Sciences, 44 Thorez Avenue, Saint-Petersburg 194223, Russia
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Zimmer N, Trzeciak ER, Müller A, Licht P, Sprang B, Leukel P, Mailänder V, Sommer C, Ringel F, Tuettenberg J, Kim E, Tuettenberg A. Nuclear Glycoprotein A Repetitions Predominant (GARP) Is a Common Trait of Glioblastoma Stem-like Cells and Correlates with Poor Survival in Glioblastoma Patients. Cancers (Basel) 2023; 15:5711. [PMID: 38136258 PMCID: PMC10741777 DOI: 10.3390/cancers15245711] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Revised: 11/17/2023] [Accepted: 12/01/2023] [Indexed: 12/24/2023] Open
Abstract
Glioblastoma (GB) is notoriously resistant to therapy. GB genesis and progression are driven by glioblastoma stem-like cells (GSCs). One goal for improving treatment efficacy and patient outcomes is targeting GSCs. Currently, there are no universal markers for GSCs. Glycoprotein A repetitions predominant (GARP), an anti-inflammatory protein expressed by activated regulatory T cells, was identified as a possible marker for GSCs. This study evaluated GARP for the detection of human GSCs utilizing a multidimensional experimental design that replicated several features of GB: (1) intratumoral heterogeneity, (2) cellular hierarchy (GSCs with varied degrees of self-renewal and differentiation), and (3) longitudinal GSC evolution during GB recurrence (GSCs from patient-matched newly diagnosed and recurrent GB). Our results indicate that GARP is expressed by GSCs across various cellular states and disease stages. GSCs with an increased GARP expression had reduced self-renewal but no alterations in proliferative capacity or differentiation commitment. Rather, GARP correlated inversely with the expression of GFAP and PDGFR-α, markers of astrocyte or oligodendrocyte differentiation. GARP had an abnormal nuclear localization (GARPNU+) in GSCs and was negatively associated with patient survival. The uniformity of GARP/GARPNU+ expression across different types of GSCs suggests a potential use of GARP as a marker to identify GSCs.
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Affiliation(s)
- Niklas Zimmer
- Department of Dermatology, University Medical Center Mainz, 55131 Mainz, Germany (P.L.)
| | - Emily R. Trzeciak
- Department of Dermatology, University Medical Center Mainz, 55131 Mainz, Germany (P.L.)
| | - Andreas Müller
- Department of Neurosurgery, University Medical Center Mainz, 55131 Mainz, Germany
- Laboratory of Experimental Neurooncology, University Medical Center Mainz, 55131 Mainz, Germany
| | - Philipp Licht
- Department of Dermatology, University Medical Center Mainz, 55131 Mainz, Germany (P.L.)
| | - Bettina Sprang
- Department of Neurosurgery, University Medical Center Mainz, 55131 Mainz, Germany
- Laboratory of Experimental Neurooncology, University Medical Center Mainz, 55131 Mainz, Germany
| | - Petra Leukel
- Institute of Neuropathology, University Medical Center Mainz, 55131 Mainz, Germany
| | - Volker Mailänder
- Department of Dermatology, University Medical Center Mainz, 55131 Mainz, Germany (P.L.)
- Research Center for Immunotherapy, University Medical Center Mainz, 55131 Mainz, Germany
| | - Clemens Sommer
- Institute of Neuropathology, University Medical Center Mainz, 55131 Mainz, Germany
| | - Florian Ringel
- Department of Neurosurgery, University Medical Center Mainz, 55131 Mainz, Germany
| | - Jochen Tuettenberg
- Department of Neurosurgery, SHG-Klinikum Idar-Oberstein, 55743 Idar-Oberstein, Germany;
| | - Ella Kim
- Department of Neurosurgery, University Medical Center Mainz, 55131 Mainz, Germany
- Laboratory of Experimental Neurooncology, University Medical Center Mainz, 55131 Mainz, Germany
| | - Andrea Tuettenberg
- Department of Dermatology, University Medical Center Mainz, 55131 Mainz, Germany (P.L.)
- Research Center for Immunotherapy, University Medical Center Mainz, 55131 Mainz, Germany
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