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MicroRNA Signatures in Malignant Pleural Mesothelioma Effusions. DISEASE MARKERS 2019; 2019:8628612. [PMID: 31481984 PMCID: PMC6701424 DOI: 10.1155/2019/8628612] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Revised: 05/28/2019] [Accepted: 07/17/2019] [Indexed: 02/08/2023]
Abstract
Malignant pleural mesothelioma (MPM) is an incurable cancer of the pleura that can be difficult to diagnose. Biomarkers for an easier and/or earlier diagnosis are needed. Approximately 90% of MPM patients develop a pleural effusion (PE). PEs are ideal sources of biomarkers as the fluid would almost always require drainage for diagnostic and/or therapeutic reasons. However, differentiating MPM PE from PE caused by other diseases can be challenging. MicroRNAs are popular biomarkers given their stable expression in tissue and fluid. MicroRNAs have been analysed in PE cytology samples for the diagnosis of MPM but have not been measured in frozen/fresh PE. We hypothesise that microRNAs expressed in PE are biomarkers for MPM. TaqMan OpenArray was used to analyse over 700 microRNAs in PE cells and supernatants from 26 MPMs and 21 other PE-causing diseases. In PE cells, combining miR-143, miR-210, and miR-200c could differentiate MPM with an area under the curve (AUC) of 0.92. The three-microRNA signature could also discriminate MPM from a further 40 adenocarcinomas with an AUC of 0.9887. These results suggest that the expression of miR-143, miR-210, and miR-200c in PE cells might provide a signature for diagnosing MPM.
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Guazzelli A, Meysami P, Bakker E, Bonanni E, Demonacos C, Krstic-Demonacos M, Mutti L. What can independent research for mesothelioma achieve to treat this orphan disease? Expert Opin Investig Drugs 2019; 28:719-732. [PMID: 31262194 DOI: 10.1080/13543784.2019.1638363] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Introduction: Malignant pleural mesothelioma (MPM) is a rare neoplasm with a poor prognosis, as current therapies are ineffective. Despite the increased understanding of the molecular biology of mesothelioma, there is still a lack of drugs that dramatically enhance patient survival. Area Covered: This review discusses recent and complete clinical trials supported by the NIH, other U.S. Federal agencies, universities and organizations found on clinicaltrials.gov. Firstly, chemotherapy-based trials are described, followed by immunotherapy and multitargeted therapy. Then we introduce drug repositioning and the use of drug docking as tools to find new interesting molecules. Finally, we highlight potential molecular pathways that may play a role in mesothelioma biology and therapy. Expert Opinion: Numerous biases are present in the clinical trials due to a restricted number of cases, inappropriate endpoints and inaccurate stratification of patients which delay the finding of a treatment for MPM. The most crucial issue of independent research for MPM is the lack of more substantive funding to translate these findings to the clinical setting. However, this approach is not necessarily scientific given the low mutational load of mesothelioma relative to other cancers, and therefore patients need a more solid rationale to have a good chance of successful treatment.
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Affiliation(s)
- Alice Guazzelli
- a School of Environment and Life Sciences, University of Salford , Salford , UK
| | - Parisa Meysami
- a School of Environment and Life Sciences, University of Salford , Salford , UK
| | - Emyr Bakker
- b School of Medicine, University of Central Lancashire , Preston , UK
| | | | - Constantinos Demonacos
- d Faculty of Biology, Medicine and Health, School of Health Sciences, University of Manchester , Manchester , UK
| | | | - Luciano Mutti
- e Sbarro Institute for Cancer Research and Molecular Medicine, Center for Biotechnology, College of Science and Technology, Temple University , Philadelphia , PA , USA
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3
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Deshmukh A, Arfuso F, Newsholme P, Dharmarajan A. Epigenetic demethylation of sFRPs, with emphasis on sFRP4 activation, leading to Wnt signalling suppression and histone modifications in breast, prostate, and ovary cancer stem cells. Int J Biochem Cell Biol 2019; 109:23-32. [DOI: 10.1016/j.biocel.2019.01.016] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Revised: 01/22/2019] [Accepted: 01/28/2019] [Indexed: 12/23/2022]
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Perumal V, Corica T, Dharmarajan AM, Sun Z, Dhaliwal SS, Dass CR, Dass J. Circulating Tumour Cells (CTC), Head and Neck Cancer and Radiotherapy; Future Perspectives. Cancers (Basel) 2019; 11:E367. [PMID: 30875950 PMCID: PMC6468366 DOI: 10.3390/cancers11030367] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Revised: 03/10/2019] [Accepted: 03/11/2019] [Indexed: 02/07/2023] Open
Abstract
Head and neck cancer is the seventh most common cancer in Australia and globally. Despite the current improved treatment modalities, there is still up to 50⁻60% local regional recurrence and or distant metastasis. High-resolution medical imaging technologies such as PET/CT and MRI do not currently detect the early spread of tumour cells, thus limiting the potential for effective minimal residual detection and early diagnosis. Circulating tumour cells (CTCs) are a rare subset of cells that escape from the primary tumour and enter into the bloodstream to form metastatic deposits or even re-establish themselves in the primary site of the cancer. These cells are more aggressive and accumulate gene alterations by somatic mutations that are the same or even greater than the primary tumour because of additional features acquired in the circulation. The potential application of CTC in clinical use is to acquire a liquid biopsy, by taking a reliable minimally invasive venous blood sample, for cell genotyping during radiotherapy treatment to monitor the decline in CTC detectability, and mutational changes in response to radiation resistance and radiation sensitivity. Currently, very little has been published on radiation therapy, CTC, and circulating cancer stem cells (CCSCs). The prognostic value of CTC in cancer management and personalised medicine for head and neck cancer radiotherapy patients requires a deeper understanding at the cellular level, along with other advanced technologies. With this goal, this review summarises the current research of head and neck cancer CTC, CCSC and the molecular targets for personalised radiotherapy response.
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Affiliation(s)
- Vanathi Perumal
- School of Pharmacy and Biomedical Sciences, Curtin University, Perth, WA 6102, Australia.
- Radiation Oncology, Sir Charles Gairdner Hospital, Cancer Centre, Nedlands, Perth, WA 6009, Australia.
- Stem Cell and Cancer Biology Laboratory, School of Pharmacy and Biomedical Sciences, Curtin Health Innovation Research Institute, Curtin University, Perth, WA 6102, Australia.
- Curtin Health Innovation Research Institute, Curtin University, Perth, WA 6102, Australia.
| | - Tammy Corica
- Radiation Oncology, Sir Charles Gairdner Hospital, Cancer Centre, Nedlands, Perth, WA 6009, Australia.
| | - Arun M Dharmarajan
- School of Pharmacy and Biomedical Sciences, Curtin University, Perth, WA 6102, Australia.
- Stem Cell and Cancer Biology Laboratory, School of Pharmacy and Biomedical Sciences, Curtin Health Innovation Research Institute, Curtin University, Perth, WA 6102, Australia.
- Curtin Health Innovation Research Institute, Curtin University, Perth, WA 6102, Australia.
| | - Zhonghua Sun
- Discipline of Medical Radiation Sciences, School of Molecular and Life Sciences, Faculty of Science and Engineering, Curtin University, Perth, WA 6102, Australia.
| | - Satvinder S Dhaliwal
- School of Public Health, Faculty of Health Sciences, Curtin University, Perth, WA 6102, Australia.
| | - Crispin R Dass
- School of Pharmacy and Biomedical Sciences, Curtin University, Perth, WA 6102, Australia.
- Curtin Health Innovation Research Institute, Curtin University, Perth, WA 6102, Australia.
| | - Joshua Dass
- Radiation Oncology, Sir Charles Gairdner Hospital, Cancer Centre, Nedlands, Perth, WA 6009, Australia.
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5
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Nordquist E, LaHaye S, Nagel C, Lincoln J. Postnatal and Adult Aortic Heart Valves Have Distinctive Transcriptional Profiles Associated With Valve Tissue Growth and Maintenance Respectively. Front Cardiovasc Med 2018; 5:30. [PMID: 29740591 PMCID: PMC5928323 DOI: 10.3389/fcvm.2018.00030] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2017] [Accepted: 03/15/2018] [Indexed: 12/16/2022] Open
Abstract
Heart valves are organized connective tissues of high mechanical demand. They open and close over 100,000 times a day to preserve unidirectional blood flow by maintaining structure-function relationships throughout life. In affected individuals, structural failure compromises function and often leads to regurgitant blood flow and progressive heart failure. This is most common in degenerative valve disease due to age-related wear and tear, or congenital malformations. At present, the only effective treatment of valve disease is surgical repair or replacement and this is often impermanent and requires anti-coagulation therapy throughout life. Therefore, there is a critical need to discover new alternatives. A promising therapeutic area is tissue regeneration and in non-valvular tissues this requires a tightly regulated genetic “growth program” involving cell proliferation. To explore this in heart valves, we performed RNA-seq analysis to compare transcriptional profiles of aortic valve tissue isolated from mice during stages of growth (postnatal day (PND) 2) and adult maintenance (4 months). Data analysis reveals distinct mRNA profiles at each time point and pathway ontology identifies associated changes in biological functions. The PND2 aortic valve is characterized by extensive cell proliferation and expression of mRNAs related to the extracellular matrix (ECM). At 4 months, proliferation is not significant and a differential set of ECM-related genes are expressed. Interestingly there is enrichment of the defense response biological process at this later time point. Together, these data highlight the unique transcriptome of the postnatal valve during stages of growth and maturation, as well as biological functions associated with adult homeostatic valves. These studies create a platform for future work exploring the molecular programs altered in the onset of heart valve disease after birth and provide insights for the development of mechanistic-based therapies.
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Affiliation(s)
- Emily Nordquist
- Molecular Cellular and Developmental Biology Graduate Program, The Ohio State University, Columbus, OH, United States.,Center for Cardiovascular Research, The Research Institute at Nationwide Children's Hospital, Columbus, OH, United States.,The Heart Center, Nationwide Children's Hospital, Columbus, OH, United States
| | - Stephanie LaHaye
- The Institute for Genomic Medicine at Nationwide Children's Hospital, Columbus, OH, United States
| | - Casey Nagel
- Ocean Ridge Biosciences, Deerfield Beach, FL, United States
| | - Joy Lincoln
- Center for Cardiovascular Research, The Research Institute at Nationwide Children's Hospital, Columbus, OH, United States.,The Heart Center, Nationwide Children's Hospital, Columbus, OH, United States.,Department of Pediatrics, The Ohio State University, Columbus, OH, United States
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Visweswaran M, Keane KN, Arfuso F, Dilley RJ, Newsholme P, Dharmarajan A. The Influence of Breast Tumour-Derived Factors and Wnt Antagonism on the Transformation of Adipose-Derived Mesenchymal Stem Cells into Tumour-Associated Fibroblasts. CANCER MICROENVIRONMENT 2018; 11:71-84. [PMID: 29637435 DOI: 10.1007/s12307-018-0210-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Accepted: 03/28/2018] [Indexed: 12/30/2022]
Abstract
Within the tumour stroma, a heterogeneous population of cell types reciprocally regulates cell proliferation, which considerably affects the progression of the disease. In this study, using tumour conditioned medium (TCM) derived from breast tumour cell lines - MCF7 and MDA MB 231, we have demonstrated the differentiation of adipose-derived mesenchymal stem cells (ADSCs) into tumour-associated fibroblasts (TAFs). Since the Wnt signalling pathway is a key signalling pathway driving breast tumour growth, the effect of the Wnt antagonist secreted frizzled-related protein 4 (sFRP4) was also examined. The response of ADSCs to TCM and sFRP4 treatments was determined by using cell viability assay to determine the changes in ADSC viability, immunofluorescence for mesenchymal markers, glucose uptake assay, and glycolysis stress test using the Seahorse Extracellular Flux analyser to determine the glycolytic activity of ADSCs. ADSCs have been shown to acquire a hyper-proliferative state, significantly increasing their number upon short-term and long-term exposure to TCM. Changes have also been observed in the expression of key mesenchymal markers as well as in the metabolic state of ADSCs. SFRP4 significantly inhibited the differentiation of ADSCs into TAFs by reducing cell growth as well as mesenchymal marker expression (cell line-dependent). However, sFRP4 did not induce further significant changes to the altered metabolic phenotype of ADSCs following TCM exposure. Altogether, this study suggests that the breast tumour milieu may transform ADSCs into a tumour-supportive phenotype, which can be altered by Wnt antagonism, but is independent of metabolic changes.
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Affiliation(s)
- Malini Visweswaran
- Stem Cell and Cancer Biology Laboratory, School of Pharmacy and Biomedical Sciences, Curtin Health Innovation Research Institute, Curtin University, Perth, WA, 6102, Australia
| | - Kevin N Keane
- School of Pharmacy and Biomedical Sciences, Curtin Health Innovation Research Institute, Curtin University, Perth, Australia
| | - Frank Arfuso
- Stem Cell and Cancer Biology Laboratory, School of Pharmacy and Biomedical Sciences, Curtin Health Innovation Research Institute, Curtin University, Perth, WA, 6102, Australia
| | - Rodney J Dilley
- Ear Sciences Centre, University of Western Australia, Perth, Australia
| | - Philip Newsholme
- School of Pharmacy and Biomedical Sciences, Curtin Health Innovation Research Institute, Curtin University, Perth, Australia
| | - Arun Dharmarajan
- Stem Cell and Cancer Biology Laboratory, School of Pharmacy and Biomedical Sciences, Curtin Health Innovation Research Institute, Curtin University, Perth, WA, 6102, Australia.
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Visweswaran M, Arfuso F, Dilley RJ, Newsholme P, Dharmarajan A. The inhibitory influence of adipose tissue-derived mesenchymal stem cell environment and Wnt antagonism on breast tumour cell lines. Int J Biochem Cell Biol 2018; 95:63-72. [DOI: 10.1016/j.biocel.2017.12.013] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Revised: 12/15/2017] [Accepted: 12/19/2017] [Indexed: 12/12/2022]
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8
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Delivery of expression constructs of secreted frizzled-related protein 4 and its domains by chitosan-dextran sulfate nanoparticles enhances their expression and anti-cancer effects. Mol Cell Biochem 2017; 443:205-213. [PMID: 29185158 DOI: 10.1007/s11010-017-3225-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Accepted: 11/24/2017] [Indexed: 12/26/2022]
Abstract
In malignant mesothelioma (MM) cells, secreted frizzled-related protein 4 (SFRP4) expression is downregulated by promoter methylation. In this study, we evaluated the effect of encapsulated chitosan-dextran (CS-DS) nanoparticle formulations of SFRP4 and its cysteine-rich domain (CRD) and netrin-like domain (NLD) as means of SFRP4-GFP protein delivery and their effects in JU77 and ONE58 MM cell lines. CS-DS formulations of SFRP4, CRD, and NLD nanoparticles were prepared by a complex coacervation technique, and particle size ranged from 300 nm for empty particles to 337 nm for particles containing the proteins. Measurement of the zeta potential showed that all preparations were around 25 mV or above, suggesting stable formulation and good affinity for the DNA molecules. The CS-DS nanoparticle formulation maintained high integrity and entrapment efficiency. Gene delivery of SFRP4 and its domains showed enhanced biological effects in both JU77 and ONE58 cell lines when compared to the non-liposomal FUGENE® HD transfection reagent. In comparison to the CRD nanoparticles, both the SFRP4 and NLD nanoparticles significantly reduced the viability of MM cells, with the NLD showing the greatest effect. The CS-DS nanoparticle effects were observed at an earlier time point and with lower DNA concentrations. Morphological changes in MM cells were characterized by the formation of membrane-associated vesicles and green fluorescent protein expression specific to SFRP4 and the NLD. The findings from our proof-of-concept study provide a stepping stone for further investigations using in vivo models.
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Wang X, Peng Q, Jiang F, Xue L, Li J, Fan Z, Chen P, Chen G, Cai Y. Secreted frizzled-related protein 5 protects against oxidative stress-induced apoptosis in human aortic endothelial cells via downregulation of Bax. J Biochem Mol Toxicol 2017; 31. [PMID: 28834606 DOI: 10.1002/jbt.21978] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2017] [Accepted: 08/01/2017] [Indexed: 12/14/2022]
Abstract
This study was undertaken to determine the role of secreted frizzled-related protein 5 (SFRP5) in endothelial oxidative injury. Human aortic endothelial cells (HAECs) were exposed to different oxidative stimuli and examined for SFRP5 expression. The effects of SFRP5 overexpression and knockdown on cell viability, apoptosis, and reactive oxygen species production were measured. HAECs treated with angiotensin (Ang) II (1 μM) or oxidized low-density lipoprotein (oxLDL) (150 μg/mL) showed a significant increase in SFRP5 expression. Overexpression of SFRP5 significantly attenuated the viability suppression and apoptosis induction by Ang II and oxLDL, whereas the knockdown of SFRP5 exerted opposite effects. Overexpression of SFRP5 prevented ROS formation and β-catenin activation and reduced Bax expression. Co-expression of Bax significantly reversed the anti-apoptotic effect of SFRP5 overexpression, whereas knockdown of Bax restrained Ang II- and oxLDL-induced apoptosis in HAECs. Taken together, SFRP5 confers protection against oxidative stress-induced apoptosis through inhibition of β-catenin activation and downregulation of Bax.
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Affiliation(s)
- Xiaojie Wang
- Department of Endocrinology, The Affiliated Hospital, Southwest Medical University, Luzhou, China
| | - Qing Peng
- Department of Cardiology, The Affiliated Hospital, Southwest Medical University, Luzhou, China
| | - Feng Jiang
- Department of Cardiology, The Affiliated Hospital, Southwest Medical University, Luzhou, China
| | - Li Xue
- Department of Cardiology, The Affiliated Hospital, Southwest Medical University, Luzhou, China
| | - Jiafu Li
- Department of Cardiology, The Affiliated Hospital, Southwest Medical University, Luzhou, China
| | - Zhongcai Fan
- Department of Cardiology, The Affiliated Hospital, Southwest Medical University, Luzhou, China
| | - Pan Chen
- Department of Endocrinology, The Affiliated Hospital, Southwest Medical University, Luzhou, China
| | - Guo Chen
- Department of Endocrinology, The Affiliated Hospital, Southwest Medical University, Luzhou, China
| | - Yihua Cai
- Department of Cardiology, The Affiliated Hospital, Southwest Medical University, Luzhou, China
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Agostino M, Pohl SÖG, Dharmarajan A. Structure-based prediction of Wnt binding affinities for Frizzled-type cysteine-rich domains. J Biol Chem 2017; 292:11218-11229. [PMID: 28533339 DOI: 10.1074/jbc.m117.786269] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2017] [Revised: 05/09/2017] [Indexed: 11/06/2022] Open
Abstract
Wnt signaling pathways are of significant interest in development and oncogenesis. The first step in these pathways typically involves the binding of a Wnt protein to the cysteine-rich domain (CRD) of a Frizzled receptor. Wnt-Frizzled interactions can be antagonized by secreted Frizzled-related proteins (SFRPs), which also contain a Frizzled-like CRD. The large number of Wnts, Frizzleds, and SFRPs, as well as the hydrophobic nature of Wnt, poses challenges to laboratory-based investigations of interactions involving Wnt. Here, utilizing structural knowledge of a representative Wnt-Frizzled CRD interaction, as well as experimentally determined binding affinities for a selection of Wnt-Frizzled CRD interactions, we generated homology models of Wnt-Frizzled CRD interactions and developed a quantitative structure-activity relationship for predicting their binding affinities. The derived model incorporates a small selection of terms derived from scoring functions used in protein-protein docking, as well as an energetic term considering the contribution made by the lipid of Wnt to the Wnt-Frizzled binding affinity. Validation with an external test set suggests that the model can accurately predict binding affinity for 75% of cases and that the error associated with the predictions is comparable with the experimental error. The model was applied to predict the binding affinities of the full range of mouse and human Wnt-Frizzled and Wnt-SFRP interactions, indicating trends in Wnt binding affinity for Frizzled and SFRP CRDs. The comprehensive predictions made in this study provide the basis for laboratory-based studies of previously unexplored Wnt-Frizzled and Wnt-SFRP interactions, which, in turn, may reveal further Wnt signaling pathways.
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Affiliation(s)
- Mark Agostino
- From the Stem Cell and Cancer Biology Laboratory, School of Biomedical Sciences and Curtin Health Innovation Research Institute and .,Curtin Institute of Computation, Curtin University, Kent Street, Bentley, Western Australia 6102, Australia
| | - Sebastian Öther-Gee Pohl
- From the Stem Cell and Cancer Biology Laboratory, School of Biomedical Sciences and Curtin Health Innovation Research Institute and
| | - Arun Dharmarajan
- From the Stem Cell and Cancer Biology Laboratory, School of Biomedical Sciences and Curtin Health Innovation Research Institute and
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Saran U, Mani KP, Balaguru UM, Swaminathan A, Nagarajan S, Dharmarajan AM, Chatterjee S. sFRP4 signalling of apoptosis and angiostasis uses nitric oxide-cGMP-permeability axis of endothelium. Nitric Oxide 2017; 66:30-42. [PMID: 28267592 DOI: 10.1016/j.niox.2017.02.012] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Revised: 02/11/2017] [Accepted: 02/13/2017] [Indexed: 01/23/2023]
Abstract
Nitric oxide (NO) plays a critical role in endothelial functions such as cellular migration, vascular permeability and angiogenesis. Angiogenesis, the formation of new blood vessels from "pre-existing" ones is a carefully regulated process and essential during reproduction, development and wound healing. Previously our lab group reported that Secreted Frizzled-Related Protein 4 (sFRP4) could inhibit angiogenesis in both in vitro and in vivo conditions. sFRP4 belongs to a family of secreted glycoproteins that function as antagonists of the canonical Wnt signalling pathway. Although the pro-apoptotic role of sFRP4 is well discussed in literature, little is known in regards to its anti-angiogenic property. The objective of this study was to elucidate sFRP4 implications in NO biology of the endothelium. Results demonstrate that sFRP4 causes endothelial dysfunction by suppressing NO-cGMP signaling and elevating corresponding ROS levels. The imbalance between NO and ROS levels results in apoptosis and subsequent leakiness of endothelium as confirmed in vivo (Texas red/Annxin - CAM assay) and in vitro (Monolayer permeability assay) conditions. Furthermore utilizing peptides synthesized from the CRD domain of sFRP4, our results showed that while these peptides were able to cause endothelial dysfunctions, they did not cause apoptosis of the endothelial cells. Thereby confirming that sFRP4 can mediate its anti-angiogenic effect independent of its pro-apoptotic property. In conclusion, the current study reports that sFRP4-mediated anti-angiogenesis occurs as a result of impaired NO-cGMP signaling which in turn allow for elevation of redox levels and promotion of apoptosis of endothelial cells.
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Affiliation(s)
- Uttara Saran
- Vascular Biology Lab, AU-KBC Research Centre, Anna University, Chennai 600044, India
| | - Krishna Priya Mani
- Vascular Biology Lab, AU-KBC Research Centre, Anna University, Chennai 600044, India
| | | | - Akila Swaminathan
- Vascular Biology Lab, AU-KBC Research Centre, Anna University, Chennai 600044, India
| | - Shunmugam Nagarajan
- Vascular Biology Lab, AU-KBC Research Centre, Anna University, Chennai 600044, India
| | - Arun M Dharmarajan
- Stem Cell and Cancer Biology Laboratory, School of Biomedical Sciences, Curtin Health Innovation Research Institute, Curtin University, Bentley, WA, Australia
| | - Suvro Chatterjee
- Vascular Biology Lab, AU-KBC Research Centre, Anna University, Chennai 600044, India; Department of Biotechnology, Anna University, Chennai 600044, India.
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