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Kuduvalli SS, Daisy PS, Vaithy A, Purushothaman M, Muralidharan AR, Agiesh KB, Mezger M, Antony JS, Subramani M, Dubashi B, Biswas I, Guruprasad KP, Anitha TS. Corrigendum: A combination of metformin and epigallocatechin gallate potentiates glioma chemotherapy in vivo. Front Pharmacol 2024; 14:1322332. [PMID: 38264527 PMCID: PMC10803621 DOI: 10.3389/fphar.2023.1322332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Accepted: 12/22/2023] [Indexed: 01/25/2024] Open
Abstract
[This corrects the article DOI: 10.3389/fphar.2023.1096614.].
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Affiliation(s)
- Shreyas S. Kuduvalli
- Mahatma Gandhi Medical Advanced Research Institute (MGMARI), Sri Balaji Vidyapeeth University (Deemed to-be University), Puducherry, India
| | - Precilla S. Daisy
- Mahatma Gandhi Medical Advanced Research Institute (MGMARI), Sri Balaji Vidyapeeth University (Deemed to-be University), Puducherry, India
| | - Anandraj Vaithy
- Department of Pathology, Mahatma Gandhi Medical College and Research Institute, Sri Balaji Vidyapeeth University (Deemed to-be University), Puducherry, India
| | | | - Arumugam Ramachandran Muralidharan
- Department of Visual Neurosciences, Singapore Eye Research Institute, Singapore, Singapore
- Eye-APC, Duke-NUS Medical School, Singapore, Singapore
| | - Kumar B. Agiesh
- Mahatma Gandhi Medical Advanced Research Institute (MGMARI), Sri Balaji Vidyapeeth University (Deemed to-be University), Puducherry, India
| | - Markus Mezger
- Department of General Paediatrics, Haematology/Oncology, University Children’s Hospital Tübingen, Tübingen, Germany
| | - Justin S. Antony
- Department of General Paediatrics, Haematology/Oncology, University Children’s Hospital Tübingen, Tübingen, Germany
| | | | - Biswajit Dubashi
- Department of Medical Oncology, Jawaharlal Institute of Postgraduate Medical Education and Research (JIPMER), Puducherry, India
| | - Indrani Biswas
- Mahatma Gandhi Medical Advanced Research Institute (MGMARI), Sri Balaji Vidyapeeth University (Deemed to-be University), Puducherry, India
| | - K. P. Guruprasad
- Department of Ageing Research, Manipal School of Life Sciences, MAHE, Manipal, Karnataka, India
| | - T. S. Anitha
- Mahatma Gandhi Medical Advanced Research Institute (MGMARI), Sri Balaji Vidyapeeth University (Deemed to-be University), Puducherry, India
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Kuduvalli SS, Daisy PS, Vaithy A, Purushothaman M, Ramachandran Muralidharan A, Agiesh KB, Mezger M, Antony JS, Subramani M, Dubashi B, Biswas I, Guruprasad KP, Anitha TS. A combination of metformin and epigallocatechin gallate potentiates glioma chemotherapy in vivo. Front Pharmacol 2023; 14:1096614. [PMID: 37025487 PMCID: PMC10070706 DOI: 10.3389/fphar.2023.1096614] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Accepted: 03/02/2023] [Indexed: 04/08/2023] Open
Abstract
Glioma is the most devastating high-grade tumor of the central nervous system, with dismal prognosis. Existing treatment modality does not provide substantial benefit to patients and demands novel strategies. One of the first-line treatments for glioma, temozolomide, provides marginal benefit to glioma patients. Repurposing of existing non-cancer drugs to treat oncology patients is gaining momentum in recent years. In this study, we investigated the therapeutic benefits of combining three repurposed drugs, namely, metformin (anti-diabetic) and epigallocatechin gallate (green tea-derived antioxidant) together with temozolomide in a glioma-induced xenograft rat model. Our triple-drug combination therapy significantly inhibited tumor growth in vivo and increased the survival rate (50%) of rats when compared with individual or dual treatments. Molecular and cellular analyses revealed that our triple-drug cocktail treatment inhibited glioma tumor growth in rat model through ROS-mediated inactivation of PI3K/AKT/mTOR pathway, arrest of the cell cycle at G1 phase and induction of molecular mechanisms of caspases-dependent apoptosis.In addition, the docking analysis and quantum mechanics studies performed here hypothesize that the effect of triple-drug combination could have been attributed by their difference in molecular interactions, that maybe due to varying electrostatic potential. Thus, repurposing metformin and epigallocatechin gallate and concurrent administration with temozolomide would serve as a prospective therapy in glioma patients.
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Affiliation(s)
- Shreyas S. Kuduvalli
- Mahatma Gandhi Medical Advanced Research Institute (MGMARI), Sri Balaji Vidyapeeth (Deemed to-be University), Puducherry, India
| | - Precilla S. Daisy
- Mahatma Gandhi Medical Advanced Research Institute (MGMARI), Sri Balaji Vidyapeeth (Deemed to-be University), Puducherry, India
| | - Anandraj Vaithy
- Department of Pathology, Mahatma Gandhi Medical College and Research Institute, Sri Balaji Vidyapeeth (Deemed to-be University), Puducherry, India
| | | | - Arumugam Ramachandran Muralidharan
- Department of Visual Neurosciences, Singapore Eye Research Institute, Singapore, Singapore
- Eye-APC, Duke-NUS Medical School, Singapore, Singapore
| | - Kumar B. Agiesh
- Mahatma Gandhi Medical Advanced Research Institute (MGMARI), Sri Balaji Vidyapeeth (Deemed to-be University), Puducherry, India
| | - Markus Mezger
- University Children’s Hospital Tübingen, Department of General Paediatrics, Haematology /Oncology, Tübingen, Germany
| | - Justin S. Antony
- University Children’s Hospital Tübingen, Department of General Paediatrics, Haematology /Oncology, Tübingen, Germany
| | | | - Biswajit Dubashi
- Department of Medical Oncology, Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India
| | - Indrani Biswas
- Mahatma Gandhi Medical Advanced Research Institute (MGMARI), Sri Balaji Vidyapeeth (Deemed to-be University), Puducherry, India
| | - K. P. Guruprasad
- Department of Ageing Research, Manipal School of Life Sciences, MAHE, Manipal, Karnataka, India
| | - T. S. Anitha
- Mahatma Gandhi Medical Advanced Research Institute (MGMARI), Sri Balaji Vidyapeeth (Deemed to-be University), Puducherry, India
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Precilla DS, Kuduvalli SS, Purushothaman M, Marimuthu P, Ramachandran MA, Anitha TS. Wnt/β-catenin Antagonists: Exploring New Avenues to Trigger Old Drugs in Alleviating Glioblastoma Multiforme. Curr Mol Pharmacol 2021; 15:338-360. [PMID: 33881978 DOI: 10.2174/1874467214666210420115431] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2020] [Revised: 12/24/2020] [Accepted: 01/30/2021] [Indexed: 11/22/2022]
Abstract
BACKGROUND Glioblastoma multiforme is one of the most heterogenous primary brain tumor with high mortality. Nevertheless, of the current therapeutic approaches, survival rate remains poor with 12 to 15 months following preliminary diagnosis, this warrants the need for effective treatment modality. Wnt/β-catenin pathway is presumably the most noteworthy pathway up-regulated in almost 80% GBM cases contributing to tumor-initiation, progression and survival. Therefore, therapeutic strategies targeting key components of Wnt/β-catenin cascade using established genotoxic agents like temozolomide and pharmacological inhibitors would be an effective approach to modulate Wnt/β-catenin pathway. Recently, drug repurposing by means of effective combination therapy has gained importance in various solid tumors including GBM, by targeting two or more proteins in a single pathway, thereby possessing the ability to overcome the hurdle implicated by chemo-resistance in GBM. OBJECTIVE In this context, by employing computational tools, an attempt has been carried out to speculate the novel combinations against Wnt/β-catenin signaling pathway. METHODS We have explored the binding interactions of three conventional drugs namely temozolomide, metformin, chloroquine along with three natural compounds viz., epigallocatechin gallate, naringenin and phloroglucinol on the major receptors of Wnt/β-catenin signaling. RESULTS It was noted that all the experimental compounds possessed profound interaction with the two major receptors of Wnt/β-catenin pathway. CONCLUSION To the best of our knowledge, this study is the first of its kind to characterize the combined interactions of the afore-mentioned drugs on Wnt/β-catenin signaling in silico and this will putatively open up new avenues for combination therapies in GBM treatment.
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Affiliation(s)
- Daisy S Precilla
- Central Inter-Disciplinary Research Facility, School of Biological Sciences, Sri Balaji Vidyapeeth (Deemed to-be University), Puducherry, India
| | - Shreyas S Kuduvalli
- Central Inter-Disciplinary Research Facility, School of Biological Sciences, Sri Balaji Vidyapeeth (Deemed to-be University), Puducherry, India
| | | | - Parthiban Marimuthu
- Structural Bioinformatics Laboratory - Pharmacy, Faculty of Science and Engineering, Åbo Akademi University, Turku. Finland
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Purushothaman M, Sarkar S, Morita M, Gugger M, Schmidt EW, Morinaka BI. Genome-Mining-Based Discovery of the Cyclic Peptide Tolypamide and TolF, a Ser/Thr Forward O-Prenyltransferase. Angew Chem Int Ed Engl 2021; 60:8460-8465. [PMID: 33586286 DOI: 10.1002/anie.202015975] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 02/04/2021] [Indexed: 11/09/2022]
Abstract
Cyanobactins comprise a widespread group of peptide metabolites produced by cyanobacteria that are often diversified by post-translational prenylation. Several enzymes have been identified in cyanobactin biosynthetic pathways that carry out chemically diverse prenylation reactions, representing a resource for the discovery of post-translational alkylating agents. Here, genome mining was used to identify orphan cyanobactin prenyltransferases, leading to the isolation of tolypamide from the freshwater cyanobacterium Tolypothrix sp. The structure of tolypamide was confirmed by spectroscopic methods, degradation, and enzymatic total synthesis. Tolypamide is forward-prenylated on a threonine residue, representing an unprecedented post-translational modification. Biochemical characterization of the cognate enzyme TolF revealed a prenyltransferase with strict selectivity for forward O-prenylation of serine or threonine but with relaxed substrate selectivity for flanking peptide sequences. Since cyanobactin pathways often exhibit exceptionally broad substrate tolerance, these enzymes represent robust tools for synthetic biology.
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Affiliation(s)
- Mugilarasi Purushothaman
- Department of Pharmacy, National University of Singapore, 18 Science Dr 4, Singapore, 117543, Singapore
| | - Snigdha Sarkar
- Department of Medicinal Chemistry, University of Utah, Salt Lake City, UT, 84112, USA
| | - Maho Morita
- Laboratory of Chemical Biology of Natural Products, Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa, Nagoya, 464-8601, Japan
| | - Muriel Gugger
- Institut Pasteur, Collection des Cyanobactéries, Département de Microbiologie, 75015, Paris, France
| | - Eric W Schmidt
- Department of Medicinal Chemistry, University of Utah, Salt Lake City, UT, 84112, USA
| | - Brandon I Morinaka
- Department of Pharmacy, National University of Singapore, 18 Science Dr 4, Singapore, 117543, Singapore
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Purushothaman M, Sarkar S, Morita M, Gugger M, Schmidt EW, Morinaka BI. Genome‐Mining‐Based Discovery of the Cyclic Peptide Tolypamide and TolF, a Ser/Thr Forward
O
‐Prenyltransferase. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202015975] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Mugilarasi Purushothaman
- Department of Pharmacy National University of Singapore 18 Science Dr 4 Singapore 117543 Singapore
| | - Snigdha Sarkar
- Department of Medicinal Chemistry University of Utah Salt Lake City UT 84112 USA
| | - Maho Morita
- Laboratory of Chemical Biology of Natural Products Graduate School of Bioagricultural Sciences Nagoya University, Furo-cho, Chikusa Nagoya 464-8601 Japan
| | - Muriel Gugger
- Institut Pasteur Collection des Cyanobactéries Département de Microbiologie 75015 Paris France
| | - Eric W. Schmidt
- Department of Medicinal Chemistry University of Utah Salt Lake City UT 84112 USA
| | - Brandon I. Morinaka
- Department of Pharmacy National University of Singapore 18 Science Dr 4 Singapore 117543 Singapore
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Nguyen TQN, Tooh YW, Sugiyama R, Nguyen TPD, Purushothaman M, Leow LC, Hanif K, Yong RHS, Agatha I, Winnerdy FR, Gugger M, Phan AT, Morinaka BI. Post-translational formation of strained cyclophanes in bacteria. Nat Chem 2020; 12:1042-1053. [DOI: 10.1038/s41557-020-0519-z] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Accepted: 07/04/2020] [Indexed: 11/09/2022]
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Beemarao M, Silambarasan S, Nasser AJA, Purushothaman M, Ravichandran K. Crystal structure, DFT and Hirshfeld surface analysis of 2-amino-4-(2-chlorophenyl)-7-hydroxy-4 H-benzo[1,2- b]pyran-3-carbonitrile. Acta Crystallogr E Crystallogr Commun 2019; 75:1638-1642. [PMID: 31709082 PMCID: PMC6829740 DOI: 10.1107/s2056989019013537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Accepted: 10/03/2019] [Indexed: 11/10/2022]
Abstract
The benzopyran ring of the title compound, C16H11ClN2O2, is planar [maximum deviation = 0.079 (2) Å] and is almost perpendicular to the chlorophenyl ring [dihedral angle = 86.85 (6)°]. In the crystal, N—H...O, O—H...N, C—H...O and C—H...Cl hydrogen bonds form inter- and intramolecular interactions. The DFT/B3LYP/6-311G(d,p) method was used to determine the HOMO–LUMO energy levels. The molecular electrostatic potential surfaces were investigated by Hirshfeld surface analysis and two-dimensional fingerprint plots were used to analyse the intermolecular interactions in the molecule.
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Purushothaman M, Krishnan PSG, Nayak SK. Effect of butyl lactate methacrylate content on the properties of acrylic acid copolymers. Polym Sci Ser A 2016. [DOI: 10.1134/s0965545x16030159] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Preetam Raj J, Purushothaman M, Ameer K, Panicker SG. In-vitro Anticancer and Antioxidant Activity of Gold Nanoparticles Conjugate with Tabernaemontana divaricata flower SMs Against MCF -7 Breast Cancer Cells. Korean Chemical Engineering Research 2016. [DOI: 10.9713/kcer.2016.54.1.75] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Purushothaman M, Santhana Gopala Krishnan P, Nayak SK. Studies on Hydrophilicity and Thermal Stability of Poly(isoalkyl lactate methacrylate)s. Journal of Macromolecular Science, Part A 2015. [DOI: 10.1080/10601325.2015.996942] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Purushothaman M, Gopala Krishnan PS, Nayak SK. Effect of Isoalkyl Lactates as Pendant Group on Poly(acrylic acid). Journal of Macromolecular Science, Part A 2014. [DOI: 10.1080/10601325.2014.906251] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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K-Raman P, Fuster V, Levy A, Purushothaman M, Oapos;Connor W, Moreno P. PO9-259 ATHEROSCLEROTIC NEOVASCULARIZATION IN DIABETES MELLITUS IS RELATED TO PLAQUE INFLAMMATION EXPRESSED AS INCREASED MACROPHAGE AND T-CELL LYMPHOCYTE INFILTRATION. ATHEROSCLEROSIS SUPP 2007. [DOI: 10.1016/s1567-5688(07)71269-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Salkever DS, Goldman H, Purushothaman M, Shinogle J. Disability management, employee health and fringe benefits, and long-term-disability claims for mental disorders: an empirical exploration. Milbank Q 2000; 78:79-113, iii. [PMID: 10834082 PMCID: PMC2751149 DOI: 10.1111/1468-0009.00162] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
Mental disorders account for a large share of claims and benefit costs in both private and public long-term-disability (LTD) insurance programs. This is the first empirical study to explore factors that may explain variations in private-sector LTD claims incidence and cost across groups of employees. Employee fringe-benefit arrangements, including patterns of coverage for mental health treatment, are found to be important predictors of incidence rates. Award rates for public disability insurance coverage (SSDI) are also strongly related to claims incidence, suggesting that private LTD is an important pathway to SSDI benefits. Some employee disability-management strategies, such as front-line manager involvement and provision of alternative jobs for employees returning from disability leave, are predictive of lower claims rates and/or costs.
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Affiliation(s)
- D S Salkever
- Department of Health Policy and Management, Johns Hopkins University, Baltimore, MD 21205, USA.
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