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Increased expression of Profilin potentiates chemotherapeutic agent-mediated tumour regression. Br J Cancer 2022; 126:1410-1420. [PMID: 35022526 PMCID: PMC9091232 DOI: 10.1038/s41416-021-01683-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Revised: 12/10/2021] [Accepted: 12/21/2021] [Indexed: 01/14/2023] Open
Abstract
BACKGROUND Targeted cancer therapy is an alternative to standard chemotherapy for a better prognosis. Although its incompetency for triple-negative breast cancer (TNBC), treatment still relies on classical chemotherapy. Increasing evidence suggest that chemotherapeutic drug-induced toxic effect could be minimised by combinatorial therapy. Profilin's familiar anti-tumorigenic activity can be utilised in combination with the drug to improve efficacy, which could be promising therapeutics to treat TNBC. METHODS All-trans retinoic acid (ATRA) in combination with vinblastine was tested on human MDA MB-231 cell line (MB-231) (in vitro) and MB-231 borne breast cancer in nude mice (in vivo). Effects of combination treatment on tumour growth inhibition and apoptosis were examined by tumour volume, histology and PARP cleavage. ATRA-induced transcriptional regulation of profilin had been evaluated by gel-shift and reporter gene assays. Profilin's role in ATRA-induced vinblastine efficacy was validated in profilin-stable and profilin-silenced cells. RESULTS ATRA binds with RAR/RXR to increase the profilin expression that potentiated cell death by chemotherapeutics. ATRA priming led to vinblastine-mediated potentiation of G2-M phase cell cycle arrest in MB-231 cells and regression of breast cancer in xenograft mice at very low concentration without any adverse effects. Moreover, increased p53 and PTEN but downregulated p65 in the tumour tissues further supported the involvement of profilin for tumour regression. CONCLUSIONS Vinblastine at very low concentration (20 times lesser than the recommended dose for breast cancer therapeutic) significantly regress tumour growth in ATRA-primed mice without any toxic effects suggesting potential combinatorial therapeutics for TNBC.
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Saurav S, Manna SK. Profilin upregulation induces autophagy through stabilization of AMP-activated protein kinase. FEBS Lett 2022; 596:1765-1777. [PMID: 35532157 DOI: 10.1002/1873-3468.14372] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 04/27/2022] [Accepted: 05/02/2022] [Indexed: 11/10/2022]
Abstract
Profilin regulates actin polymerization, and its balanced expression is required for cellular growth and development. Most tumors have compromised profilin expression, and its overexpression in MDA MB-231 breast cancer cells has been reported to activate AMP-activated protein kinase α (AMPKα), an energy-sensing molecule that affects various cellular processes including autophagy. The present study aims to explore the role of profilin in inducing autophagy. We employed all-trans retinoic acid (ATRA) as an inducer of profilin expression and showed that profilin induces autophagy through mTOR inhibition, autophagy-activating kinase ULK1 upregulation, and AMPK stabilization as well as its activation. Furthermore, evidence from our study indicates physical interaction between profilin and AMPK, which results in AMPK stabilization and induction of prolonged autophagy, thereby leading to apoptosis. This study uncovers a novel mechanism that induces autophagy in triple-negative breast cancer cells.
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Affiliation(s)
- Shashank Saurav
- Laboratory of Immunology, Centre for DNA Fingerprinting & Diagnostics, Uppal, Hyderabad, 500 039, Telangana, India.,Graduate Studies, Manipal Academy of Higher Education, Manipal, 576104, Karnataka, India
| | - Sunil Kumar Manna
- Laboratory of Immunology, Centre for DNA Fingerprinting & Diagnostics, Uppal, Hyderabad, 500 039, Telangana, India
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Zembroski AS, Andolino C, Buhman KK, Teegarden D. Proteomic Characterization of Cytoplasmic Lipid Droplets in Human Metastatic Breast Cancer Cells. Front Oncol 2021; 11:576326. [PMID: 34141606 PMCID: PMC8204105 DOI: 10.3389/fonc.2021.576326] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Accepted: 05/10/2021] [Indexed: 12/19/2022] Open
Abstract
One of the characteristic features of metastatic breast cancer is increased cellular storage of neutral lipid in cytoplasmic lipid droplets (CLDs). CLD accumulation is associated with increased cancer aggressiveness, suggesting CLDs contribute to metastasis. However, how CLDs contribute to metastasis is not clear. CLDs are composed of a neutral lipid core, a phospholipid monolayer, and associated proteins. Proteins that associate with CLDs regulate both cellular and CLD metabolism; however, the proteome of CLDs in metastatic breast cancer and how these proteins may contribute to breast cancer progression is unknown. Therefore, the purpose of this study was to identify the proteome and assess the characteristics of CLDs in the MCF10CA1a human metastatic breast cancer cell line. Utilizing shotgun proteomics, we identified over 1500 proteins involved in a variety of cellular processes in the isolated CLD fraction. Interestingly, unlike other cell lines such as adipocytes or enterocytes, the most enriched protein categories were involved in cellular processes outside of lipid metabolism. For example, cell-cell adhesion was the most enriched category of proteins identified, and many of these proteins have been implicated in breast cancer metastasis. In addition, we characterized CLD size and area in MCF10CA1a cells using transmission electron microscopy. Our results provide a hypothesis-generating list of potential players in breast cancer progression and offers a new perspective on the role of CLDs in cancer.
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Affiliation(s)
- Alyssa S Zembroski
- Department of Nutrition Science, Purdue University, West Lafayette, IN, United States
| | - Chaylen Andolino
- Department of Nutrition Science, Purdue University, West Lafayette, IN, United States
| | - Kimberly K Buhman
- Department of Nutrition Science, Purdue University, West Lafayette, IN, United States
| | - Dorothy Teegarden
- Department of Nutrition Science, Purdue University, West Lafayette, IN, United States
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Abstract
Profilin is a ubiquitously expressed protein well known as a key regulator of actin polymerisation. The actin cytoskeleton is involved in almost all cellular processes including motility, endocytosis, metabolism, signal transduction and gene transcription. Hence, profilin's role in the cell goes beyond its direct and essential function in regulating actin dynamics. This review will focus on the interactions of Profilin 1 and its ligands at the plasma membrane, in the cytoplasm and the nucleus of the cells and the regulation of profilin activity within those cell compartments. We will discuss the interactions of profilin in cell signalling pathways and highlight the importance of the cell context in the multiple functions that this small essential protein has in conjunction with its role in cytoskeletal organisation and dynamics. We will review some of the mechanisms that control profilin expression and the implications of changed expression of profilin in the light of cancer biology and other pathologies.
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Golubnitschaja O, Filep N, Yeghiazaryan K, Blom HJ, Hofmann-Apitius M, Kuhn W. Multi-omic approach decodes paradoxes of the triple-negative breast cancer: lessons for predictive, preventive and personalised medicine. Amino Acids 2017; 50:383-395. [PMID: 29249020 DOI: 10.1007/s00726-017-2524-0] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Accepted: 12/05/2017] [Indexed: 10/24/2022]
Abstract
Breast cancer epidemic in the early twenty-first century results in around two million new cases and half-a-million of the disease-related deaths registered annually worldwide. A particularly dramatic situation is attributed to some specific patient subgroups such as the triple-negative breast cancer (TNBC). TNBC is a particularly aggressive type of breast cancer lacking clear diagnostic approach and targeted therapies. Consequently, more than 50% of the TNBC patients die of the metastatic BC within the first 6 months of the diagnosis. In the current study we have hypothesised that multi-omic approach utilising blood samples may lead to discovery of a unique molecular signature of the TNBC subtype. The results achieved demonstrate, indeed, multi-omics as highly promising approach that could be of great clinical utility for development of predictive diagnosis, targeted prevention and treatments tailored to the person-overall advancing the management of the TNBC.
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Affiliation(s)
- Olga Golubnitschaja
- Department of Radiology, Rheinische Friedrich-Wilhelms-Universität Bonn, Sigmund-Freud-Str 25, 53105, Bonn, Germany. .,Breast Cancer Research Centre, Rheinische Friedrich-Wilhelms-Universität Bonn, Bonn, Germany. .,Centre for Integrated Oncology, Cologne-Bonn, Rheinische Friedrich-Wilhelms-Universität Bonn, Bonn, Germany.
| | - Nora Filep
- Department of Bioinformatics, Fraunhofer Institute for Algorithms and Scientific Computing (SCAI), Sankt Augustin, Germany
| | - Kristina Yeghiazaryan
- Department of Radiology, Rheinische Friedrich-Wilhelms-Universität Bonn, Sigmund-Freud-Str 25, 53105, Bonn, Germany.,Breast Cancer Research Centre, Rheinische Friedrich-Wilhelms-Universität Bonn, Bonn, Germany.,Centre for Integrated Oncology, Cologne-Bonn, Rheinische Friedrich-Wilhelms-Universität Bonn, Bonn, Germany
| | - Henricus Johannes Blom
- Laboratory of Clinical Biochemistry and Metabolism, Department of General Pediatrics, Adolescent Medicine and Neonatology, University Medical Centre Freiburg, Freiburg, Germany
| | - Martin Hofmann-Apitius
- Department of Bioinformatics, Fraunhofer Institute for Algorithms and Scientific Computing (SCAI), Sankt Augustin, Germany
| | - Walther Kuhn
- Breast Cancer Research Centre, Rheinische Friedrich-Wilhelms-Universität Bonn, Bonn, Germany.,Centre for Integrated Oncology, Cologne-Bonn, Rheinische Friedrich-Wilhelms-Universität Bonn, Bonn, Germany.,Centre for Obstetrics and Gynaecology, Rheinische Friedrich-Wilhelms-Universität Bonn, Bonn, Germany
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Moens PDJ, Coumans JVF. Profilin-1 mediated cell-cycle arrest: searching for drug targets. Cell Cycle 2015; 14:3669-70. [PMID: 26313613 DOI: 10.1080/15384101.2015.1086204] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Affiliation(s)
- Pierre D J Moens
- a Centre for Bioactive Discovery in Health and Aging; School of Science and Technology ; University of New England ; Armidale , NSW Australia
| | - Joelle V F Coumans
- b School of Rural Medicine ; University of New England ; Armidale , NSW Australia
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