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Sherapura A, Siddesh BM, Malojirao VH, Thirusangu P, Avin BRV, Kumari NS, Ramachandra YL, Prabhakar BT. Steroidal alkaloid solanidine impedes hypoxia-driven ATM phosphorylation to switch on anti-angiogenesis in lung adenocarcinoma. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2023; 119:154981. [PMID: 37531902 DOI: 10.1016/j.phymed.2023.154981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 06/14/2023] [Accepted: 07/15/2023] [Indexed: 08/04/2023]
Abstract
PURPOSE The declined oxygen tension in the cancer cell leads to the hypoxic adaptive response and favors establishment of tumor micro environment [TEM]. The complex TME consists of interwoven hypoxic HIF-1α and DNA damage repair ATM signaling. The ATM/HIF-1α phosphorylation switch on angiogenesis and abort apoptosis. Targeting this signaling nexus would be a novel therapeutic strategy for the treatment of cancer. BACKGROUND Steroidal alkaloid solanidine is known for varied pharmacological role but with less molecular evidences. Our earlier findings on solanidine proven its anti-neoplastic activity by inducing apoptosis in lung cancer. In continued research, efforts have been made to establish the underlying molecular signaling in induction of DNA damage in prevailing hypoxic TME. METHODS The solanidine induced DNA damage was assessed trough alkali COMET assay; signaling nexus and gene expression profile analysis through IB, qRT-PCR, Gelatin Zymography, IHC, IF and ELISA. Pathophysiological modulations assessed through tube formation, migration, invasion assays. Anti-angiogenic studies through CAM, rat aorta, matrigel assays and corneal neovascularization assay. Anti-tumor activity through in-vivo DLA ascites tumor model and LLC model. RESULTS The results postulates, inhibition of hypoxia driven DDR proteins pATMser1981/pHIF-1αser696 by solanidine induces anti-angiogenesis. Systematic study of both non-tumorigenic and tumorigenic models in-vitro as well as in-vivo experimental system revealed the angio-regression mediated anticancer effect in lung cancer. These effects are due to the impeded expression of angiogenic mediators such as VEGF, MMP2&9 and inflammatory cytokines IL6 and TNFα to induce pathophysiological changes CONCLUSION: The study establishes new role of solanidine by targeting ATM/HIF-1α signaling to induce anti-angiogenesis for the first time. The study highlights the potentiality of plant based phytomedicine solanidine which can targets the multiple hallmarks of cancer by targeting interwoven signaling crosstalk. Such an approach through solanidine necessary to counteract heterogeneous complexity of cancer which could be nearly translated into drug.
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Affiliation(s)
- Ankith Sherapura
- Molecular Biomedicine Laboratory, Postgraduate Department of Studies and Research in Biotechnology, Sahyadri Science College, Kuvempu University, Shivamogga, 577203, Karnataka, India
| | - B M Siddesh
- Molecular Biomedicine Laboratory, Postgraduate Department of Studies and Research in Biotechnology, Sahyadri Science College, Kuvempu University, Shivamogga, 577203, Karnataka, India
| | - Vikas H Malojirao
- Molecular Biomedicine Laboratory, Postgraduate Department of Studies and Research in Biotechnology, Sahyadri Science College, Kuvempu University, Shivamogga, 577203, Karnataka, India; Division for DNA Repair Research, Department of Neurosurgery, Centre for Neuroregeneration, Houston Methodist, Fannin Street, Houston, TX, USA
| | - Prabhu Thirusangu
- Molecular Biomedicine Laboratory, Postgraduate Department of Studies and Research in Biotechnology, Sahyadri Science College, Kuvempu University, Shivamogga, 577203, Karnataka, India; Department of Experidmental Pathology and Laboratory Medicine, Mayo Clinic, Rochester, MN, USA
| | - B R Vijay Avin
- Molecular Biomedicine Laboratory, Postgraduate Department of Studies and Research in Biotechnology, Sahyadri Science College, Kuvempu University, Shivamogga, 577203, Karnataka, India; Department of Pharmacology and Centre for Lung and Vascular Biology, University of Illinois at Chicago, Chicago, 60612, USA
| | - N Suchetha Kumari
- Department of Biochemistry, K.S. Hegde Medical College, Nitte University, Mangalore, India
| | - Y L Ramachandra
- Postgraduate Department of Studies and Research in Biotechnology, Kuvempu University, Shankaraghatta, 577 451, Karnataka, India
| | - B T Prabhakar
- Molecular Biomedicine Laboratory, Postgraduate Department of Studies and Research in Biotechnology, Sahyadri Science College, Kuvempu University, Shivamogga, 577203, Karnataka, India.
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Kadir RRA, Alwjwaj M, Rakkar K, Othman OA, Sprigg N, Bath PM, Bayraktutan U. Outgrowth Endothelial Cell Conditioned Medium Negates TNF-α-Evoked Cerebral Barrier Damage: A Reverse Translational Research to Explore Mechanisms. Stem Cell Rev Rep 2023; 19:503-515. [PMID: 36056287 PMCID: PMC9902316 DOI: 10.1007/s12015-022-10439-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/28/2022] [Indexed: 02/07/2023]
Abstract
Improved understanding of the key mechanisms underlying cerebral ischemic injury is essential for the discovery of efficacious novel therapeutics for stroke. Through detailed analysis of plasma samples obtained from a large number of healthy volunteers (n = 90) and ischemic stroke patients (n = 81), the current study found significant elevations in the levels of TNF-α at baseline (within the first 48 h of stroke) and on days 7, 30, 90 after ischaemic stroke. It then assessed the impact of this inflammatory cytokine on an in vitro model of human blood-brain barrier (BBB) and revealed dramatic impairments in both barrier integrity and function, the main cause of early death after an ischemic stroke. Co-treatment of BBB models in similar experiments with outgrowth endothelial cell-derived conditioned media (OEC-CM) negated the deleterious effects of TNF-α on BBB. Effective suppression of anti-angiogenic factor endostatin, stress fiber formation, oxidative stress, and apoptosis along with concomitant improvements in extracellular matrix adhesive and tubulogenic properties of brain microvascular endothelial cells and OECs played an important role in OEC-CM-mediated benefits. Significant increases in pro-angiogenic endothelin-1 and monocyte chemoattractant protein-1 in OEC-CM compared to the secretomes of OEC and HBMEC, detected by proteome profiling assay, accentuate the beneficial effects of OEC-CM. In conclusion, this reverse translational study identifies TNF-α as an important mediator of post-ischemic cerebral barrier damage and proposes OEC-CM as a potential vasculoprotective therapeutic strategy by demonstrating its ability to regulate a wide range of mechanisms associated with BBB function. Clinical trial registration NCT02980354.
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Affiliation(s)
- Rais Reskiawan A Kadir
- Academic Unit of Mental Health and Clinical Neuroscience, Clinical Sciences Building, School of Medicine, The University of Nottingham, Hucknall Road, Nottingham, NG5 1PB, UK
| | - Mansour Alwjwaj
- Academic Unit of Mental Health and Clinical Neuroscience, Clinical Sciences Building, School of Medicine, The University of Nottingham, Hucknall Road, Nottingham, NG5 1PB, UK
| | - Kamini Rakkar
- Academic Unit of Mental Health and Clinical Neuroscience, Clinical Sciences Building, School of Medicine, The University of Nottingham, Hucknall Road, Nottingham, NG5 1PB, UK
| | - Othman Ahmad Othman
- Academic Unit of Mental Health and Clinical Neuroscience, Clinical Sciences Building, School of Medicine, The University of Nottingham, Hucknall Road, Nottingham, NG5 1PB, UK
| | - Nikola Sprigg
- Academic Unit of Mental Health and Clinical Neuroscience, Clinical Sciences Building, School of Medicine, The University of Nottingham, Hucknall Road, Nottingham, NG5 1PB, UK
| | - Philip M Bath
- Academic Unit of Mental Health and Clinical Neuroscience, Clinical Sciences Building, School of Medicine, The University of Nottingham, Hucknall Road, Nottingham, NG5 1PB, UK
| | - Ulvi Bayraktutan
- Academic Unit of Mental Health and Clinical Neuroscience, Clinical Sciences Building, School of Medicine, The University of Nottingham, Hucknall Road, Nottingham, NG5 1PB, UK.
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Arteriogenesis and Therapeutic Angiogenesis-An Update. Int J Mol Sci 2021; 22:ijms222413244. [PMID: 34948041 PMCID: PMC8709312 DOI: 10.3390/ijms222413244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Accepted: 12/06/2021] [Indexed: 11/17/2022] Open
Abstract
Vascular occlusive diseases such myocardial infarction, peripheral artery disease of the lower extremities, or stroke still represent a substantial health burden worldwide [...].
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