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Singh S, Goel T, Singh A, Chugh H, Chakraborty N, Roy I, Tiwari M, Chandra R. Synthesis and characterization of Fe 3O 4@SiO 2@PDA@Ag core-shell nanoparticles and biological application on human lung cancer cell line and antibacterial strains. Artif Cells Nanomed Biotechnol 2024; 52:46-58. [PMID: 38156875 DOI: 10.1080/21691401.2023.2295534] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Accepted: 12/06/2023] [Indexed: 01/03/2024]
Abstract
Novel magnetic and metallic nanoparticles garner much attention of researchers due to their biological, chemical and catalytic properties in many chemical reactions. In this study, we have successfully prepared a core-shell Fe3O4@SiO2@PDA nanocomposite wrapped with Ag using a simple synthesis method, characterised and tested on small cell lung cancer and antibacterial strains. Incorporating Ag in Fe3O4@SiO2@PDA provides promising advantages in biomedical applications. The magnetic Fe3O4 nanoparticles were coated with SiO2 to obtain negatively charged surface which is then coated with polydopamine (PDA). Then silver nanoparticles were assembled on Fe3O4@SiO2@PDA surface, which results in the formation core-shell nanocomposite. The synthesised nanocomposite were characterized using SEM-EDAX, dynamic light scattering, XRD, FT-IR and TEM. In this work, we report the anticancer activity of silver nanoparticles against H1299 lung cancer cell line using MTT assay. The cytotoxicity data revealed that the IC50 of Fe3O4@SiO2@PDA@Ag against H1299 lung cancer nanocomposites cells was 21.52 µg/mL. Furthermore, the biological data of nanocomposites against Gram-negative 'Pseudomonas aeruginosa' and Gram-positive 'Staphylococcus aureus' were carried out. The range of minimum inhibitory concentration was found to be 115 µg/mL where gentamicin was used as a standard drug. The synthesized AgNPs proves its supremacy as an efficient biomedical agent and AgNPs may act as potential beneficial molecule in lung cancer chemoprevention and antibacterial strains.
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Affiliation(s)
- Snigdha Singh
- Department of Chemistry, University of Delhi, Delhi, India
| | - Tanya Goel
- Department of Chemistry, University of Delhi, Delhi, India
- Dr. B. R. Ambedkar Center for Biomedical Research, University of Delhi, Delhi, India
| | - Aarushi Singh
- Department of Chemistry, University of Delhi, Delhi, India
- Max Planck Institute for Multidisciplinary Sciences, Göttingen, Germany
| | - Heerak Chugh
- Department of Chemistry, University of Delhi, Delhi, India
| | | | - Indrajit Roy
- Department of Chemistry, University of Delhi, Delhi, India
| | - Manisha Tiwari
- Dr. B. R. Ambedkar Center for Biomedical Research, University of Delhi, Delhi, India
| | - Ramesh Chandra
- Department of Chemistry, University of Delhi, Delhi, India
- Dr. B. R. Ambedkar Center for Biomedical Research, University of Delhi, Delhi, India
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Mishra CB, Shalini S, Gusain S, Kumar P, Kumari S, Choi YS, Kumari J, Moku BK, Yadav AK, Prakash A, Jeon R, Tiwari M. Multitarget action of Benzothiazole-piperazine small hybrid molecule against Alzheimer's disease: In silico, In vitro, and In vivo investigation. Biomed Pharmacother 2024; 174:116484. [PMID: 38565058 DOI: 10.1016/j.biopha.2024.116484] [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: 01/02/2024] [Revised: 03/12/2024] [Accepted: 03/19/2024] [Indexed: 04/04/2024] Open
Abstract
A novel small molecule based on benzothiazole-piperazine has been identified as an effective multi-target-directed ligand (MTDL) against Alzheimer's disease (AD). Employing a medicinal chemistry approach, combined with molecular docking, MD simulation, and binding free energy estimation, compound 1 emerged as a potent MTDL against AD. Notably, compound 1 demonstrated efficient binding to both AChE and Aβ1-42, involving crucial molecular interactions within their active sites. It displayed a binding free energy (ΔGbind) -18.64± 0.16 and -16.10 ± 0.18 kcal/mol against AChE and Aβ1-42, respectively. In-silico findings were substantiated through rigorous in vitro and in vivo studies. In vitro analysis confirmed compound 1 (IC50=0.42 μM) as an effective, mixed-type, and selective AChE inhibitor, binding at both the enzyme's catalytic and peripheral anionic sites. Furthermore, compound 1 demonstrated a remarkable ability to reduce the aggregation propensity of Aβ, as evidenced by Confocal laser scanning microscopy and TEM studies. Remarkably, in vivo studies exhibited the promising therapeutic potential of compound 1. In a scopolamine-induced memory deficit mouse model of AD, compound 1 showed significantly improved spatial memory and cognition. These findings collectively underscore the potential of compound 1 as a promising therapeutic candidate for the treatment of AD.
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Affiliation(s)
- Chandra Bhushan Mishra
- College of Pharmacy, Sookmyung Women's University, Cheongpa-ro 47-gil 100, Yongsan-gu, Seoul 04310, South Korea; Department of Biochemistry and Molecular Pharmacology, Baylor College of Medicine, Houston, TX 77030, USA.
| | - Shruti Shalini
- Dr. B. R. Ambedkar Centre for Biomedical Research, University of Delhi, New Delhi 110007, India
| | - Siddharth Gusain
- Dr. B. R. Ambedkar Centre for Biomedical Research, University of Delhi, New Delhi 110007, India
| | - Pawan Kumar
- School of Computational and Integrative Sciences, Jawaharlal Nehru University, New Delhi 110067, India
| | - Shikha Kumari
- Department of Chemistry, Virginia Tech, Blacksburg, VA 24061, USA
| | - Yong-Sung Choi
- College of Pharmacy, Sookmyung Women's University, Cheongpa-ro 47-gil 100, Yongsan-gu, Seoul 04310, South Korea
| | - Jyoti Kumari
- Dr. B. R. Ambedkar Centre for Biomedical Research, University of Delhi, New Delhi 110007, India
| | - Bala Krishna Moku
- Department of Biochemistry and Molecular Pharmacology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Anita Kumari Yadav
- Dr. B. R. Ambedkar Centre for Biomedical Research, University of Delhi, New Delhi 110007, India
| | - Amresh Prakash
- Amity Institute of Integrative Sciences and Health (AIISH), Amity University Haryana, Amity Education Valley, Gurgaon 122413, India
| | - Raok Jeon
- College of Pharmacy, Sookmyung Women's University, Cheongpa-ro 47-gil 100, Yongsan-gu, Seoul 04310, South Korea.
| | - Manisha Tiwari
- Dr. B. R. Ambedkar Centre for Biomedical Research, University of Delhi, New Delhi 110007, India.
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Li D, Parvez W, Tiwari M, Jones M, Tufail M, Agrawal S, Bennett J, Sudhir R. EP13.01-001 The Burden of Incidental Extra-thoracic Positron Emission Tomography-CT (PET-CT) Findings in Thoracic Malignancies. J Thorac Oncol 2022. [DOI: 10.1016/j.jtho.2022.07.921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Varma DA, Singh M, Wakode S, Dinesh NE, Vinaik S, Asthana S, Tiwari M. Structure-based pharmacophore mapping and virtual screening of natural products to identify polypharmacological inhibitor against c-MET/EGFR/VEGFR-2. J Biomol Struct Dyn 2022; 41:2956-2970. [PMID: 35196966 DOI: 10.1080/07391102.2022.2042388] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Three receptor tyrosine kinases (RTKs), c-MET, EGFR, and VEGFR-2 have been identified as potential oncogenic targets involved in tumor development, metastasis, and invasion. Designing inhibitors that can simultaneously interact with multiple targets is a promising approach, therefore, inhibiting these three RTKs with a single chemical component might give an effective chemotherapeutic strategy for addressing the disease while limiting adverse effects. The in-silico methods have been developed to identify the polypharmacological inhibitors particularly for drug repurposing and multitarget drug design. Here, to find a viable inhibitor from natural source against these three RTKs, structure-based pharmacophore mapping and virtual screening of SN-II database were carried out. The filtered compound SN00020821, identified as Cedeodarin, from different computational approaches, demonstrated good interactions with all the three targets, c-MET/EGFR/VEGFR-2, with interaction energies of -42.35 kcal/mol, -49.32 kcal/mol and -44.83 kcal/mol, respectively. SN00020821displayed stable key interactions with critical amino acids of all the three receptors' kinase catalytic domains including "DFG motif" explored through the MD simulations. Furthermore, it also met the ADMET requirements and was determined to be drug-like as predicted from the Lipinski's rule of five and Veber's rule. Finally, SN00020821 provides a novel molecular scaffold that could be investigated further as a polypharmacological anticancer therapeutic candidate that targets the three RTKs.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Diksha A Varma
- Dr. B. R Ambedkar Centre for Biomedical Research, University of Delhi, New Delhi, India
| | - Mrityunjay Singh
- Non-communicable diseases, Translational Health Science and Technology Institute, Faridabad, India.,Pharmaceutical Chemistry, Delhi Institute of Pharmaceutical Sciences and Research, DPSRU, New Delhi, India
| | - Sharad Wakode
- Pharmaceutical Chemistry, Delhi Institute of Pharmaceutical Sciences and Research, DPSRU, New Delhi, India
| | - N E Dinesh
- Dr. B. R Ambedkar Centre for Biomedical Research, University of Delhi, New Delhi, India
| | - Simran Vinaik
- Dr. B. R Ambedkar Centre for Biomedical Research, University of Delhi, New Delhi, India
| | - Shailendra Asthana
- Non-communicable diseases, Translational Health Science and Technology Institute, Faridabad, India
| | - Manisha Tiwari
- Dr. B. R Ambedkar Centre for Biomedical Research, University of Delhi, New Delhi, India
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Li J, Tiwari M, Chen Y, Luanpitpong S, Sen GL. CDK12 Is Necessary to Promote Epidermal Differentiation Through Transcription Elongation. Stem Cells 2022; 40:435-445. [PMID: 35325240 PMCID: PMC9199850 DOI: 10.1093/stmcls/sxac002] [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: 08/20/2021] [Accepted: 12/17/2021] [Indexed: 01/30/2023]
Abstract
Proper differentiation of the epidermis is essential to prevent water loss and to protect the body from the outside environment. Perturbations in this process can lead to a variety of skin diseases that impacts 1 in 5 people. While transcription factors that control epidermal differentiation have been well characterized, other aspects of transcription control such as elongation are poorly understood. Here we show that of the two cyclin-dependent kinases (CDK12 and CDK13), that are known to regulate transcription elongation, only CDK12 is necessary for epidermal differentiation. Depletion of CDK12 led to loss of differentiation gene expression and absence of skin barrier formation in regenerated human epidermis. CDK12 binds to genes that code for differentiation promoting transcription factors (GRHL3, KLF4, and OVOL1) and is necessary for their elongation. CDK12 is necessary for elongation by promoting Ser2 phosphorylation on the C-terminal domain of RNA polymerase II and the stabilization of binding of the elongation factor SPT6 to target genes. Our results suggest that control of transcription elongation by CDK12 plays a prominent role in adult cell fate decisions.
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Affiliation(s)
- Jingting Li
- Institute of Precision Medicine, Department of Burns, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, Guangdong, China
| | - Manisha Tiwari
- Department of Dermatology and Department of Cellular and Molecular Medicine, UCSD Stem Cell Program, University of California, San Diego, La Jolla, CA, USA
| | - Yifang Chen
- Department of Dermatology and Department of Cellular and Molecular Medicine, UCSD Stem Cell Program, University of California, San Diego, La Jolla, CA, USA
| | - Sudjit Luanpitpong
- Siriraj Center of Excellence for Stem Cell Research, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkoknoi, Bangkok, Thailand
| | - George L Sen
- Department of Dermatology and Department of Cellular and Molecular Medicine, UCSD Stem Cell Program, University of California, San Diego, La Jolla, CA, USA,Corresponding author: George L. Sen, Department of Dermatology and Department of Cellular and Molecular Medicine, UCSD Stem Cell Program, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0869, USA. Tel: 858-246-0268;
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Ling J, Tiwari M, Chen Y, Sen GL. RACK1 Prevents the Premature Differentiation of Epidermal Progenitor Cells by Inhibiting IRF6 Expression. J Invest Dermatol 2021; 142:1499-1502.e4. [PMID: 34742704 DOI: 10.1016/j.jid.2021.10.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 09/29/2021] [Accepted: 10/18/2021] [Indexed: 11/16/2022]
Affiliation(s)
- Ji Ling
- Department of Dermatology, Department of Cellular and Molecular Medicine, UCSD Stem Cell Program, University of California, San Diego, La Jolla, CA 92093-0869
| | - Manisha Tiwari
- Department of Dermatology, Department of Cellular and Molecular Medicine, UCSD Stem Cell Program, University of California, San Diego, La Jolla, CA 92093-0869
| | - Yifang Chen
- Department of Dermatology, Department of Cellular and Molecular Medicine, UCSD Stem Cell Program, University of California, San Diego, La Jolla, CA 92093-0869
| | - George L Sen
- Department of Dermatology, Department of Cellular and Molecular Medicine, UCSD Stem Cell Program, University of California, San Diego, La Jolla, CA 92093-0869.
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Tiwari DK, Jha G, Tiwari M, Kerkar S, Das S, Gobre VV. Synergistic Antibacterial Potential and Cell Surface Topology Study of Carbon Nanodots and Tetracycline Against E. coli. Front Bioeng Biotechnol 2021; 9:626276. [PMID: 34676200 PMCID: PMC8524088 DOI: 10.3389/fbioe.2021.626276] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Accepted: 08/05/2021] [Indexed: 11/24/2022] Open
Abstract
Increasing drugs and antibiotic resistance against pathogenic bacteria create the necessity to explore novel biocompatible antibacterial materials. This study investigated the antibacterial effect of carbon dot (C-dot) against E. coli and suggested an effective synergistic dose of tetracycline with C-dot, using mathematical modeling of antibacterial data. Colony count and growth curve studies clearly show an enhanced antibacterial activity against E. coli synergistically treated with C-dot and tetracycline, even at a concentration ten times lower than the minimum inhibitory concentration (MIC). The Richards model-fit of growth curve clearly showed an increase in doubling time, reduction in growth rate, and early stationary phase in the synergistic treatment with 42% reduction in the growth rate (μm) compared to the control. Morphological studies of E. coli synergistically treated with C-dot + tetracycline showed cell damage and deposition of C-dots on the bacterial cell membrane in scanning electron microscopy imaging. We further validated the topological changes, cell surface roughness, and significant changes in the height profile (ΔZ) with the control and treated E. coli cells viewed under an atomic force microscope. We confirmed that the effective antibacterial doses of C-dot and tetracycline were much lower than the MIC in a synergistic treatment.
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Affiliation(s)
- Dhermendra K Tiwari
- Department of Biotechnology, Faculty of Life Sciences and Environment, Goa University, Taleigao plateau, Goa, India
| | - Gargi Jha
- Department of Biotechnology, Faculty of Life Sciences and Environment, Goa University, Taleigao plateau, Goa, India
| | - Manisha Tiwari
- Department of Biotechnology, Faculty of Life Sciences and Environment, Goa University, Taleigao plateau, Goa, India
| | - Savita Kerkar
- Department of Biotechnology, Faculty of Life Sciences and Environment, Goa University, Taleigao plateau, Goa, India
| | - Suman Das
- Department of Biotechnology, Faculty of Life Sciences and Environment, Goa University, Taleigao plateau, Goa, India
| | - Vivekanand V Gobre
- School of Chemical Sciences, Goa University, Taleigao plateau, Goa, India
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Li J, Chen Y, Tiwari M, Bansal V, Sen GL. Regulation of integrin and extracellular matrix genes by HNRNPL is necessary for epidermal renewal. PLoS Biol 2021; 19:e3001378. [PMID: 34543262 PMCID: PMC8452081 DOI: 10.1371/journal.pbio.3001378] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Accepted: 07/30/2021] [Indexed: 01/05/2023] Open
Abstract
Stratified epithelia such as the epidermis require coordinated regulation of stem and progenitor cell proliferation, survival, and differentiation to maintain homeostasis. Integrin-mediated anchorage of the basal layer stem cells of the epidermis to the underlying dermis through extracellular matrix (ECM) proteins is crucial for this process. It is currently unknown how the expression of these integrins and ECM genes are regulated. Here, we show that the RNA-binding protein (RBP) heterogeneous nuclear ribonucleoprotein L (HNRNPL) binds to these genes on chromatin to promote their expression. HNRNPL recruits RNA polymerase II (Pol II) to integrin/ECM genes and is required for stabilizing Pol II transcription through those genes. In the absence of HNRNPL, the basal layer of the epidermis where the stem cells reside prematurely differentiates and detaches from the underlying dermis due to diminished integrin/ECM expression. Our results demonstrate a critical role for RBPs on chromatin to maintain stem and progenitor cell fate by dictating the expression of specific classes of genes.
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Affiliation(s)
- Jingting Li
- Institute of Precision Medicine, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Yifang Chen
- Department of Dermatology, Department of Cellular and Molecular Medicine, UCSD Stem Cell Program, University of California San Diego, La Jolla, California, United States of America
| | - Manisha Tiwari
- Department of Dermatology, Department of Cellular and Molecular Medicine, UCSD Stem Cell Program, University of California San Diego, La Jolla, California, United States of America
| | - Varun Bansal
- Department of Dermatology, Department of Cellular and Molecular Medicine, UCSD Stem Cell Program, University of California San Diego, La Jolla, California, United States of America
| | - George L. Sen
- Department of Dermatology, Department of Cellular and Molecular Medicine, UCSD Stem Cell Program, University of California San Diego, La Jolla, California, United States of America
- * E-mail:
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Varma DA, Tiwari M. Crizotinib-induced anti-cancer activity in human cervical carcinoma cells via ROS-dependent mitochondrial depolarization and induction of apoptotic pathway. J Obstet Gynaecol Res 2021; 47:3923-3930. [PMID: 34482598 DOI: 10.1111/jog.15003] [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: 05/11/2021] [Revised: 08/04/2021] [Accepted: 08/21/2021] [Indexed: 12/09/2022]
Abstract
INTRODUCTION Cervical cancer is one of the leading causes of mortality among women population worldwide. In spite of recurrent screening, vaccination, and chemotherapeutic interventions, combating cervical cancer still remains a challenge. Crizotinib is a small molecule inhibitor that targets mesenchymal epithelial transition factor (c-MET) and has been successfully studied for its anti-cancer effects in non-small cell lung cancer, pancreatic, gastric, renal, prostate, and breast carcinomas. Although c-MET is a well-known prognostic, diagnostic, and therapeutic target in cervical cancer, anti-cancer properties of its inhibitor crizotinib against cervical carcinoma, has not been explored yet. METHODS In the present study, the anti-cancer effects of crizotinib on cervical cancer cells were evaluated using various in vitro cell-based assays, such as labelling drug-treated cells with MTT, H2 DCFDA, Annexin V5-fluorescein isothiocyanate (FITC) antibody, JC-1, PI, and analysis using fluorescence-activated cell sorting (FACS). RESULTS The molecule was found to effectively inhibit proliferation of cervical cancer cells HeLa and SiHa with an IC50 of 0.641 ± 0.0724 and 0.871 ± 0.104 μM, respectively, and induce apoptosis in a dose-dependent manner. Further investigations showed that crizotinib-induced production of reactive oxygen species (ROS) with increasing concentrations further resulted in mitochondrial membrane depolarization. However, the drug had no effect on cell cycle progression of HeLa and SiHa cells. CONCLUSION Thus, the study elucidates the cytotoxic effects of crizotinib in cervical cancer cells by activation of ROS-dependent apoptotic pathway via mitochondrial depolarization. These findings will further aid the evaluation of other molecular mechanisms of crizotinib and would pave the way for its implication as a chemotherapeutic option in cervical cancer.
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Affiliation(s)
- Diksha A Varma
- Dr. B. R Ambedkar Centre for Biomedical Research, University of Delhi, North Campus, New Delhi, India
| | - Manisha Tiwari
- Dr. B. R Ambedkar Centre for Biomedical Research, University of Delhi, North Campus, New Delhi, India
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Tiwari M, Verma M, Singh P, Bharti D. Role of Fok I VDR polymorphism in TB risk assessment; A Study in Central India population. Meta Gene 2021. [DOI: 10.1016/j.mgene.2021.100896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Mishra CB, Kumari S, Angeli A, Bua S, Mongre RK, Tiwari M, Supuran CT. Discovery of Potent Carbonic Anhydrase Inhibitors as Effective Anticonvulsant Agents: Drug Design, Synthesis, and In Vitro and In Vivo Investigations. J Med Chem 2021; 64:3100-3114. [PMID: 33721499 DOI: 10.1021/acs.jmedchem.0c01889] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Two sets of benzenesulfonamide-based effective human carbonic anhydrase (hCA) inhibitors have been developed using the tail approach. The inhibitory action of these novel molecules was examined against four isoforms: hCA I, hCA II, hCA VII, and hCA XII. Most of the molecules disclosed low to medium nanomolar range inhibition against all tested isoforms. Some of the synthesized derivatives selectively inhibited the epilepsy-involved isoforms hCA II and hCA VII, showing low nanomolar affinity. The anticonvulsant activity of selected sulfonamides was assessed using the maximal electroshock seizure (MES) and subcutaneous pentylenetetrazole (sc-PTZ) in vivo models of epilepsy. These potent CA inhibitors effectively inhibited seizures in both epilepsy models. The most effective compounds showed long duration of action and abolished MES-induced seizures up to 6 h after drug administration. These sulfonamides were found to be orally active anticonvulsants, being nontoxic in neuronal cell lines and in animal models.
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Affiliation(s)
- Chandra Bhushan Mishra
- College of Pharmacy, Sookmyung Women's University, Cheongpa-ro 47-gil 100, Yongsan-gu, Seoul 04310, Republic of Korea
| | - Shikha Kumari
- Bio-Organic Chemistry Laboratory, Dr. B. R. Ambedkar Center for Biomedical Research, University of Delhi, Delhi 110007, India
| | - Andrea Angeli
- Dipartimento Neurofarba, Sezione di Scienze Farmaceutiche e Nutraceutiche, Universitàdegli Studi di Firenze, Florence 50019, Italy
| | - Silvia Bua
- Dipartimento Neurofarba, Sezione di Scienze Farmaceutiche e Nutraceutiche, Universitàdegli Studi di Firenze, Florence 50019, Italy
| | - Raj Kumar Mongre
- College of Pharmacy, Sookmyung Women's University, Cheongpa-ro 47-gil 100, Yongsan-gu, Seoul 04310, Republic of Korea
| | - Manisha Tiwari
- Bio-Organic Chemistry Laboratory, Dr. B. R. Ambedkar Center for Biomedical Research, University of Delhi, Delhi 110007, India
| | - Claudiu T Supuran
- Dipartimento Neurofarba, Sezione di Scienze Farmaceutiche e Nutraceutiche, Universitàdegli Studi di Firenze, Florence 50019, Italy
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Li J, Xu X, Tiwari M, Chen Y, Fuller M, Bansal V, Tamayo P, Das S, Ghosh P, Sen GL. SPT6 promotes epidermal differentiation and blockade of an intestinal-like phenotype through control of transcriptional elongation. Nat Commun 2021; 12:784. [PMID: 33542242 PMCID: PMC7862286 DOI: 10.1038/s41467-021-21067-w] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Accepted: 01/11/2021] [Indexed: 12/16/2022] Open
Abstract
In adult tissue, stem and progenitor cells must tightly regulate the balance between proliferation and differentiation to sustain homeostasis. How this exquisite balance is achieved is an area of active investigation. Here, we show that epidermal genes, including ~30% of induced differentiation genes already contain stalled Pol II at the promoters in epidermal stem and progenitor cells which is then released into productive transcription elongation upon differentiation. Central to this process are SPT6 and PAF1 which are necessary for the elongation of these differentiation genes. Upon SPT6 or PAF1 depletion there is a loss of human skin differentiation and stratification. Unexpectedly, loss of SPT6 also causes the spontaneous transdifferentiation of epidermal cells into an intestinal-like phenotype due to the stalled transcription of the master regulator of epidermal fate P63. Our findings suggest that control of transcription elongation through SPT6 plays a prominent role in adult somatic tissue differentiation and the inhibition of alternative cell fate choices.
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Affiliation(s)
- Jingting Li
- Department of Dermatology, Department of Cellular and Molecular Medicine, UCSD Stem Cell Program, University of California, San Diego, La Jolla, CA, USA
| | - Xiaojun Xu
- Moores Cancer Center, University of California, San Diego, La Jolla, CA, USA
| | - Manisha Tiwari
- Department of Dermatology, Department of Cellular and Molecular Medicine, UCSD Stem Cell Program, University of California, San Diego, La Jolla, CA, USA
| | - Yifang Chen
- Department of Dermatology, Department of Cellular and Molecular Medicine, UCSD Stem Cell Program, University of California, San Diego, La Jolla, CA, USA
| | - Mackenzie Fuller
- Departments of Medicine and Cellular and Molecular Medicine, HUMANOID Center of Research Excellence, University of California, San Diego, La Jolla, CA, USA
- Department of Pathology, HUMANOID Center of Research Excellence, University of California, San Diego, La Jolla, CA, USA
| | - Varun Bansal
- Department of Dermatology, Department of Cellular and Molecular Medicine, UCSD Stem Cell Program, University of California, San Diego, La Jolla, CA, USA
| | - Pablo Tamayo
- Moores Cancer Center, University of California, San Diego, La Jolla, CA, USA
- Division of Medical Genetics, School of Medicine, University of California, San Diego, La Jolla, CA, USA
| | - Soumita Das
- Department of Pathology, HUMANOID Center of Research Excellence, University of California, San Diego, La Jolla, CA, USA
| | - Pradipta Ghosh
- Departments of Medicine and Cellular and Molecular Medicine, HUMANOID Center of Research Excellence, University of California, San Diego, La Jolla, CA, USA
| | - George L Sen
- Department of Dermatology, Department of Cellular and Molecular Medicine, UCSD Stem Cell Program, University of California, San Diego, La Jolla, CA, USA.
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Saxena A, Kumar V, Tiwari M, Kumar S, Kumar U. Research Article Non-synonymous de novo gene mutations in Wilms’ Tumor: Identification and characterization of new variants of WT1 and WT2 loci in Indian Population. Genet Mol Res 2021. [DOI: 10.4238/gmr18958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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D’Ambrosio K, Di Fiore A, Buonanno M, Kumari S, Tiwari M, Supuran CT, Mishra CB, Monti SM, De Simone G. The crystal structures of 2-(4-benzhydrylpiperazin-1-yl)- N-(4-sulfamoylphenyl)acetamide in complex with human carbonic anhydrase II and VII provide insights into selective CA inhibitor development. NEW J CHEM 2021. [DOI: 10.1039/d0nj03544k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Our studies suggest that the acetamide linker and long tails are suitable structural features to design selective CA inhibitors.
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Affiliation(s)
| | - Anna Di Fiore
- Istituto di Biostrutture e Bioimmagini-CNR
- Napoli
- Italy
| | | | - Shikha Kumari
- Dr. B. R. Ambedkar Centre for Biomedical Research
- University of Delhi
- Delhi
- India
| | - Manisha Tiwari
- Dr. B. R. Ambedkar Centre for Biomedical Research
- University of Delhi
- Delhi
- India
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15
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Das S, Tiwari M, Mondal D, Sahoo BR, Tiwari DK. Growing tool-kit of photosensitizers for clinical and non-clinical applications. J Mater Chem B 2020; 8:10897-10940. [PMID: 33165483 DOI: 10.1039/d0tb02085k] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Photosensitizers are photosensitive molecules utilized in clinical and non-clinical applications by taking advantage of light-mediated reactive oxygen generation, which triggers local and systemic cellular toxicity. Photosensitizers are used for diverse biological applications such as spatio-temporal inactivation of a protein in a living system by chromophore-assisted light inactivation, localized cell photoablation, photodynamic and immuno-photodynamic therapy, and correlative light-electron microscopy imaging. Substantial efforts have been made to develop several genetically encoded, chemically synthesized, and nanotechnologically driven photosensitizers for successful implementation in redox biology applications. Genetically encoded photosensitizers (GEPS) or reactive oxygen species (ROS) generating proteins have the advantage of using them in the living system since they can be manipulated by genetic engineering with a variety of target-specific genes for the precise spatio-temporal control of ROS generation. The GEPS variety is limited but is expanding with a variety of newly emerging GEPS proteins. Apart from GEPS, a large variety of chemically- and nanotechnologically-empowered photosensitizers have been developed with a major focus on photodynamic therapy-based cancer treatment alone or in combination with pre-existing treatment methods. Recently, immuno-photodynamic therapy has emerged as an effective cancer treatment method using smartly designed photosensitizers to initiate and engage the patient's immune system so as to empower the photosensitizing effect. In this review, we have discussed various types of photosensitizers, their clinical and non-clinical applications, and implementation toward intelligent efficacy, ROS efficiency, and target specificity in biological systems.
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Affiliation(s)
- Suman Das
- Department of Biotechnology, Faculty of Life Sciences and Environment, Goa University, Taleigao Plateau, Goa 403206, India.
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16
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Ling J, Sckaff M, Tiwari M, Chen Y, Li J, Jones J, Sen GL. RAS-mediated suppression of PAR3 and its effects on SCC initiation and tissue architecture occur independently of hyperplasia. J Cell Sci 2020; 133:jcs.249102. [PMID: 33172988 DOI: 10.1242/jcs.249102] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [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: 05/18/2020] [Accepted: 10/27/2020] [Indexed: 12/12/2022] Open
Abstract
Proper epithelial development and homeostasis depends on strict control of oriented cell division. Current evidence shows that this process is regulated by intrinsic polarity factors and external spatial cues. Owing to the lack of an appropriate model system that can recapitulate the architecture of the skin, deregulation of spindle orientation in human epithelial carcinoma has never been investigated. Here, using an inducible model of human squamous cell carcinoma (SCC), we demonstrate that RAS-dependent suppression of PAR3 (encoded by PARD3) accelerates epithelial disorganization during early tumorigenesis. Diminished PAR3 led to loss of E-cadherin-mediated cell adhesion, which in turn contributed to misoriented cell division. Pharmacological inhibition of the MAPK pathway downstream of RAS activation reversed the defects in PAR3 expression, E-cadherin-mediated cell adhesion and mitotic spindle orientation. Thus, temporal analysis of human neoplasia provides a powerful approach to study cellular and molecular transformations during early oncogenesis, which allowed identification of PAR3 as a critical regulator of tissue architecture during initial human SCC development.
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Affiliation(s)
- Ji Ling
- Department of Dermatology, Department of Cellular and Molecular Medicine, UCSD Stem Cell Program, University of California, San Diego, La Jolla, CA 92093-0869, USA
| | - Maria Sckaff
- Department of Dermatology, Department of Cellular and Molecular Medicine, UCSD Stem Cell Program, University of California, San Diego, La Jolla, CA 92093-0869, USA
| | - Manisha Tiwari
- Department of Dermatology, Department of Cellular and Molecular Medicine, UCSD Stem Cell Program, University of California, San Diego, La Jolla, CA 92093-0869, USA
| | - Yifang Chen
- Department of Dermatology, Department of Cellular and Molecular Medicine, UCSD Stem Cell Program, University of California, San Diego, La Jolla, CA 92093-0869, USA
| | - Jingting Li
- Department of Dermatology, Department of Cellular and Molecular Medicine, UCSD Stem Cell Program, University of California, San Diego, La Jolla, CA 92093-0869, USA
| | - Jackson Jones
- Department of Dermatology, Department of Cellular and Molecular Medicine, UCSD Stem Cell Program, University of California, San Diego, La Jolla, CA 92093-0869, USA
| | - George L Sen
- Department of Dermatology, Department of Cellular and Molecular Medicine, UCSD Stem Cell Program, University of California, San Diego, La Jolla, CA 92093-0869, USA
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17
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Li J, Bansal V, Tiwari M, Chen Y, Sen GL. ELL Facilitates RNA Polymerase II-Mediated Transcription of Human Epidermal Proliferation Genes. J Invest Dermatol 2020; 141:1352-1356.e3. [PMID: 33157094 DOI: 10.1016/j.jid.2020.09.024] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 09/25/2020] [Accepted: 09/29/2020] [Indexed: 01/08/2023]
Affiliation(s)
- Jingting Li
- Department of Dermatology, University of California, San Diego, La Jolla, California, USA; Department of Cellular and Molecular Medicine, UCSD Stem Cell Program, University of California, San Diego, La Jolla, California, USA
| | - Varun Bansal
- Department of Dermatology, University of California, San Diego, La Jolla, California, USA; Department of Cellular and Molecular Medicine, UCSD Stem Cell Program, University of California, San Diego, La Jolla, California, USA
| | - Manisha Tiwari
- Department of Dermatology, University of California, San Diego, La Jolla, California, USA; Department of Cellular and Molecular Medicine, UCSD Stem Cell Program, University of California, San Diego, La Jolla, California, USA
| | - Yifang Chen
- Department of Dermatology, University of California, San Diego, La Jolla, California, USA; Department of Cellular and Molecular Medicine, UCSD Stem Cell Program, University of California, San Diego, La Jolla, California, USA
| | - George L Sen
- Department of Dermatology, University of California, San Diego, La Jolla, California, USA; Department of Cellular and Molecular Medicine, UCSD Stem Cell Program, University of California, San Diego, La Jolla, California, USA.
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18
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Abstract
AIM Trichostatin A (TSA) has been shown to mitigate whole body γ-radiation-induced morbidity and mortality. The current study aimed at studying the effects of TSA post-irradiation treatment on gut-microbiota, especially the translocation of the microbes from the intestine to other organs in C57 Bl/6 mice model. MATERIALS AND METHODS On 1st, 3rd 5th 7th 9th 12th and 14th days after various treatments bacteria were isolated from the intestine and nearby organs (mesenteric lymph node, spleen and liver) for further analysis. The jejunum part of all animals was processed for histological analysis. RESULTS The group radiation + drug showed reduced susceptibility to radiation injury as well as microbiota related anomalies compared to the irradiated alone group. This was described by increased microflora in different parts of the GI tract in the radiation + drug group compared to the irradiated group and reduced histopathological damages in the jejunum. Also, a reduced percentage of translocated bacteria were found in different organs of radiation + drug group animals. CONCLUSION TSA treatment post-irradiation could effectively control bacterial translocation as well as GI injury in mice.
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Affiliation(s)
- Noopur Gupta
- Department of Radiation Genetics and Epigenetics, Institute of Nuclear Medicine and Allied Sciences, Delhi, India.,Ambedkar Center for Biomedical Research, University of Delhi, Delhi, India
| | - Anup Kainthola
- Department of Radiation Genetics and Epigenetics, Institute of Nuclear Medicine and Allied Sciences, Delhi, India
| | - Manisha Tiwari
- Ambedkar Center for Biomedical Research, University of Delhi, Delhi, India
| | - Paban K Agrawala
- Department of Radiation Genetics and Epigenetics, Institute of Nuclear Medicine and Allied Sciences, Delhi, India
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19
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Mishra CB, Tiwari M, Supuran CT. Progress in the development of human carbonic anhydrase inhibitors and their pharmacological applications: Where are we today? Med Res Rev 2020; 40:2485-2565. [PMID: 32691504 DOI: 10.1002/med.21713] [Citation(s) in RCA: 134] [Impact Index Per Article: 33.5] [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: 02/04/2020] [Revised: 06/14/2020] [Accepted: 07/03/2020] [Indexed: 12/21/2022]
Abstract
Carbonic anhydrases (CAs, EC 4.2.1.1) are widely distributed metalloenzymes in both prokaryotes and eukaryotes. They efficiently catalyze the reversible hydration of carbon dioxide to bicarbonate and H+ ions and play a crucial role in regulating many physiological processes. CAs are well-studied drug target for various disorders such as glaucoma, epilepsy, sleep apnea, and high altitude sickness. In the past decades, a large category of diverse families of CA inhibitors (CAIs) have been developed and many of them showed effective inhibition toward specific isoforms, and effectiveness in pathological conditions in preclinical and clinical settings. The discovery of isoform-selective CAIs in the last decade led to diminished side effects associated with off-target isoforms inhibition. The many new classes of such compounds will be discussed in the review, together with strategies for their development. Pharmacological advances of the newly emerged CAIs in diseases not usually associated with CA inhibition (neuropathic pain, arthritis, cerebral ischemia, and cancer) will also be discussed.
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Affiliation(s)
- Chandra B Mishra
- Department of Bioorganic Chemistry, Dr. B. R. Ambedkar Center for Biomedical Research, University of Delhi, Delhi, India.,Department of Pharmaceutical Chemistry, College of Pharmacy, Sookmyung Women's University, Seoul, South Korea
| | - Manisha Tiwari
- Department of Bioorganic Chemistry, Dr. B. R. Ambedkar Center for Biomedical Research, University of Delhi, Delhi, India
| | - Claudiu T Supuran
- Dipartimento Neurofarba, Sezione di Scienze Farmaceutiche e Nutraceutiche, Università degli Studi di Firenze, Florence, Italy
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20
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Jones J, Chen Y, Tiwari M, Li J, Ling J, Sen GL. KLF3 Mediates Epidermal Differentiation through the Epigenomic Writer CBP. iScience 2020; 23:101320. [PMID: 32659720 PMCID: PMC7358749 DOI: 10.1016/j.isci.2020.101320] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Revised: 06/02/2020] [Accepted: 06/24/2020] [Indexed: 12/24/2022] Open
Abstract
Impairments in the differentiation process can lead to skin diseases that can afflict ∼20% of the population. Thus, it is of utmost importance to understand the factors that promote the differentiation process. Here we identify the transcription factor KLF3 as a regulator of epidermal differentiation. Knockdown of KLF3 results in reduced differentiation gene expression and increased cell cycle gene expression. Over half of KLF3's genomic binding sites occur at active enhancers. KLF3 binds to active enhancers proximal to differentiation genes that are dependent upon KLF3 for expression. KLF3's genomic binding sites also highly overlaps with CBP, a histone acetyltransferase necessary for activating enhancers. Depletion of KLF3 causes reduced CBP localization at enhancers proximal to differentiation gene clusters, which leads to loss of enhancer activation but not priming. Our results suggest that KLF3 is necessary to recruit CBP to activate enhancers and drive epidermal differentiation gene expression.
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Affiliation(s)
- Jackson Jones
- Department of Dermatology, Department of Cellular and Molecular Medicine, UCSD Stem Cell Program, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0869, USA
| | - Yifang Chen
- Department of Dermatology, Department of Cellular and Molecular Medicine, UCSD Stem Cell Program, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0869, USA
| | - Manisha Tiwari
- Department of Dermatology, Department of Cellular and Molecular Medicine, UCSD Stem Cell Program, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0869, USA
| | - Jingting Li
- Department of Dermatology, Department of Cellular and Molecular Medicine, UCSD Stem Cell Program, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0869, USA
| | - Ji Ling
- Department of Dermatology, Department of Cellular and Molecular Medicine, UCSD Stem Cell Program, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0869, USA
| | - George L Sen
- Department of Dermatology, Department of Cellular and Molecular Medicine, UCSD Stem Cell Program, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0869, USA.
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21
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Li J, Tiwari M, Xu X, Chen Y, Tamayo P, Sen GL. TEAD1 and TEAD3 Play Redundant Roles in the Regulation of Human Epidermal Proliferation. J Invest Dermatol 2020; 140:2081-2084.e4. [PMID: 32142794 DOI: 10.1016/j.jid.2020.01.029] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2019] [Revised: 01/15/2020] [Accepted: 01/31/2020] [Indexed: 01/20/2023]
Affiliation(s)
- Jingting Li
- Department of Dermatology, Department of Cellular and Molecular Medicine, UCSD Stem Cell Program, University of California, San Diego, La Jolla, California, USA
| | - Manisha Tiwari
- Department of Dermatology, Department of Cellular and Molecular Medicine, UCSD Stem Cell Program, University of California, San Diego, La Jolla, California, USA
| | - Xiaojun Xu
- Moores Cancer Center, University of California, San Diego, La Jolla, California, USA
| | - Yifang Chen
- Department of Dermatology, Department of Cellular and Molecular Medicine, UCSD Stem Cell Program, University of California, San Diego, La Jolla, California, USA
| | - Pablo Tamayo
- Moores Cancer Center, University of California, San Diego, La Jolla, California, USA; Division of Medical Genetics, School of Medicine, University of California, San Diego, La Jolla, California, USA
| | - George L Sen
- Department of Dermatology, Department of Cellular and Molecular Medicine, UCSD Stem Cell Program, University of California, San Diego, La Jolla, California, USA.
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22
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Jones J, Chen Y, Tiwari M, Li J, Ling J, Sen GL. BRD4 Is Necessary for Differentiation Downstream of Epidermal Lineage-Determining Transcription Factors. J Invest Dermatol 2020; 140:2077-2081.e5. [PMID: 32142793 DOI: 10.1016/j.jid.2020.01.030] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Revised: 01/17/2020] [Accepted: 01/27/2020] [Indexed: 02/06/2023]
Affiliation(s)
- Jackson Jones
- Department of Dermatology, Department of Cellular and Molecular Medicine, UCSD Stem Cell Program, University of California, San Diego, La Jolla, California, USA
| | - Yifang Chen
- Department of Dermatology, Department of Cellular and Molecular Medicine, UCSD Stem Cell Program, University of California, San Diego, La Jolla, California, USA
| | - Manisha Tiwari
- Department of Dermatology, Department of Cellular and Molecular Medicine, UCSD Stem Cell Program, University of California, San Diego, La Jolla, California, USA
| | - Jingting Li
- Department of Dermatology, Department of Cellular and Molecular Medicine, UCSD Stem Cell Program, University of California, San Diego, La Jolla, California, USA
| | - Ji Ling
- Department of Dermatology, Department of Cellular and Molecular Medicine, UCSD Stem Cell Program, University of California, San Diego, La Jolla, California, USA
| | - George L Sen
- Department of Dermatology, Department of Cellular and Molecular Medicine, UCSD Stem Cell Program, University of California, San Diego, La Jolla, California, USA.
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23
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López-Mendilaharsu M, Giffoni B, Monteiro D, Prosdocimi L, Vélez-Rubio GM, Fallabrino A, Estrades A, Santos AS, Lara PH, Pires T, Tiwari M, Bolten AB, Marcovaldi MÂ. Multiple-threats analysis for loggerhead sea turtles in the southwest Atlantic Ocean. ENDANGER SPECIES RES 2020. [DOI: 10.3354/esr01025] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Priority-setting approaches for widely distributed and long-lived species can be challenging. This is especially true for sea turtles, which are species of conservation concern. The aim of this study was to conduct a detailed analysis of threats to identify, quantify and prioritize the main impacts to the loggerhead Caretta caretta population in the southwest Atlantic (SWA) region. A matrix of relative threats was constructed. Threats were identified and classified for 8 different life stages (nesting females, eggs, hatchlings, swim-frenzy transitional stage, juveniles-neritic, juveniles-oceanic, adults-neritic, adults-oceanic) and for 3 ecosystems inhabited by sea turtles (terrestrial, neritic and oceanic). Results indicated that fisheries bycatch represents a major threat for loggerheads in the SWA. The trawl fishery was identified as the main source of mortality for neritic juvenile and adult turtles, whereas juveniles in oceanic areas are mostly impacted by surface longlines. In terrestrial environments, eggs and hatchlings are mainly affected by habitat alteration and by native and exotic predators. Loggerheads have shown a positive nesting trend at their main nesting beaches in the SWA, probably due to long-term conservation efforts to reduce mortality of the different life stages within the terrestrial zone. However, the high mortality rates of juveniles and sub-adults documented at some known foraging grounds represent a reason for concern, as this may affect the overall population trend in the future. This threat analysis provides a tool to review the goals of national action plans, prioritize actions and optimize the allocation of management resources.
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Affiliation(s)
- M López-Mendilaharsu
- Fundação Pró-Tamar, Rua Rubens Guelli 134/ 307, Itaigara - Salvador, CEP: 41815-135 Bahia, Brazil
| | - B Giffoni
- Fundação Pró-Tamar, Rua Rubens Guelli 134/ 307, Itaigara - Salvador, CEP: 41815-135 Bahia, Brazil
| | - D Monteiro
- Núcleo de Educação e Monitoramento Ambiental - NEMA, Rua Maria Araújo 450, 96207-480 Rio Grande, RS, Brazil
- Laboratório de Ecologia e Conservação da Megafauna Marinha, EcoMega, Universidade Federal do Rio Grande, FURG, 96203-900 Rio Grande, RS, Brazil
| | - L Prosdocimi
- Programa Regional de Investigación y Conservación de Tortugas Marinas de la Argentina (PRICTMA), 1609 Buenos Aires, Argentina
| | - GM Vélez-Rubio
- Karumbé NGO, Zoo Villa Dolores, 11600 Montevideo, Uruguay
- Centro Universitario Regional del Este (CURE), Universidad de la República, 27000 Rocha, Uruguay
| | - A Fallabrino
- Karumbé NGO, Zoo Villa Dolores, 11600 Montevideo, Uruguay
| | - A Estrades
- Karumbé NGO, Zoo Villa Dolores, 11600 Montevideo, Uruguay
| | - AS Santos
- Fundação Pró-Tamar, Rua Rubens Guelli 134/ 307, Itaigara - Salvador, CEP: 41815-135 Bahia, Brazil
| | - PH Lara
- Fundação Pró-Tamar, Rua Rubens Guelli 134/ 307, Itaigara - Salvador, CEP: 41815-135 Bahia, Brazil
| | - T Pires
- Fundação Pró-Tamar, Rua Rubens Guelli 134/ 307, Itaigara - Salvador, CEP: 41815-135 Bahia, Brazil
| | - M Tiwari
- NOAA-National Marine Fisheries Service, Marine Turtle Ecology & Assessment Program, Southwest Fisheries Science Center, La Jolla, California 92034, USA
| | - AB Bolten
- Archie Carr Center for Sea Turtle Research and Department of Biology, University of Florida, Gainesville, Florida 32611, USA
| | - MÂ Marcovaldi
- Fundação Pró-Tamar, Rua Rubens Guelli 134/ 307, Itaigara - Salvador, CEP: 41815-135 Bahia, Brazil
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24
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Singh AD, Ghosh AK, Mehrotra RC, Patnaik R, Tiwari M. Recent advances in understanding Neogene climatic evolution: Indian perspective. PINSA 2020. [DOI: 10.16943/ptinsa/2020/49776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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25
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Mishra CB, Shalini S, Gusain S, Prakash A, Kumari J, Kumari S, Yadav AK, Lynn AM, Tiwari M. Development of novel N-(6-methanesulfonyl-benzothiazol-2-yl)-3-(4-substituted-piperazin-1-yl)-propionamides with cholinesterase inhibition, anti-β-amyloid aggregation, neuroprotection and cognition enhancing properties for the therapy of Alzheimer's disease. RSC Adv 2020; 10:17602-17619. [PMID: 35515597 PMCID: PMC9053591 DOI: 10.1039/d0ra00663g] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Accepted: 04/19/2020] [Indexed: 12/14/2022] Open
Abstract
A novel series of benzothiazole–piperazine hybrids were rationally designed, synthesized, and evaluated as multifunctional ligands against Alzheimer's disease (AD). The synthesized hybrid molecules illustrated modest to strong inhibition of acetylcholinesterase (AChE) and Aβ1-42 aggregation. Compound 12 emerged as the most potent hybrid molecule exhibiting balanced functions with effective, uncompetitive and selective inhibition against AChE (IC50 = 2.31 μM), good copper chelation, Aβ1-42 aggregation inhibition (53.30%) and disaggregation activities. Confocal laser scanning microscopy and TEM analysis also validate the Aβ fibril inhibition ability of this compound. Furthermore, this compound has also shown low toxicity and is capable of impeding loss of cell viability elicited by H2O2 neurotoxicity in SHSY-5Y cells. Notably, compound 12 significantly improved cognition and spatial memory against scopolamine-induced memory deficit in a mouse model. Hence, our results corroborate the multifunctional nature of novel hybrid molecule 12 against AD and it may be a suitable lead for further development as an effective therapeutic agent for therapy in the future. A novel series of benzothiazole–piperazine hybrids were rationally designed, synthesized, and evaluated as multifunctional ligands against Alzheimer's disease (AD).![]()
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Affiliation(s)
- Chandra Bhushan Mishra
- Dr. B. R. Ambedkar Centre for Biomedical Research
- University of Delhi
- New Delhi 110007
- India
| | - Shruti Shalini
- Dr. B. R. Ambedkar Centre for Biomedical Research
- University of Delhi
- New Delhi 110007
- India
| | - Siddharth Gusain
- Dr. B. R. Ambedkar Centre for Biomedical Research
- University of Delhi
- New Delhi 110007
- India
| | - Amresh Prakash
- Amity Institute of Integrative Sciences and Health (AIISH)
- Amity University Haryana
- Gurgaon-122413
- India
| | - Jyoti Kumari
- Dr. B. R. Ambedkar Centre for Biomedical Research
- University of Delhi
- New Delhi 110007
- India
| | - Shikha Kumari
- Dr. B. R. Ambedkar Centre for Biomedical Research
- University of Delhi
- New Delhi 110007
- India
| | - Anita Kumari Yadav
- Dr. B. R. Ambedkar Centre for Biomedical Research
- University of Delhi
- New Delhi 110007
- India
| | - Andrew M. Lynn
- School of Computational & Integrative Sciences
- Jawaharlal Nehru University
- New Delhi 110067
- India
| | - Manisha Tiwari
- Dr. B. R. Ambedkar Centre for Biomedical Research
- University of Delhi
- New Delhi 110007
- India
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Saxena A, Tiwari M, Kumar R, Aprajita, Kumar A, Singh C, Agarwal M. Research Article Impact of the Y-chromosome gene on SOX9 stem cell expression in non-obstructive azoospermic cases. Genet Mol Res 2020. [DOI: 10.4238/gmr18464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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27
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Umar T, Shalini S, Raza MK, Gusain S, Kumar J, Seth P, Tiwari M, Hoda N. A multifunctional therapeutic approach: Synthesis, biological evaluation, crystal structure and molecular docking of diversified 1H-pyrazolo[3,4-b]pyridine derivatives against Alzheimer's disease. Eur J Med Chem 2019; 175:2-19. [DOI: 10.1016/j.ejmech.2019.04.038] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Revised: 04/03/2019] [Accepted: 04/13/2019] [Indexed: 11/26/2022]
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28
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Umar T, Gusain S, Raza MK, Shalini S, Kumar J, Tiwari M, Hoda N. Naphthalene-triazolopyrimidine hybrid compounds as potential multifunctional anti-Alzheimer's agents. Bioorg Med Chem 2019; 27:3156-3166. [PMID: 31176571 DOI: 10.1016/j.bmc.2019.06.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [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: 02/08/2019] [Revised: 05/29/2019] [Accepted: 06/01/2019] [Indexed: 01/12/2023]
Abstract
In an attempt to construct potential anti-Alzheimer's agents Naphthalene-triazolopyrimidine hybrids were synthesized and screened in vitro against the two cholinesterases (ChE)s, amyloid β aggregation and for antioxidation activity. Single-crystal X-ray crystallography was utilized for crystal structure determination of one of the compounds. In vitro study of compounds revealed that most of the compounds are capable of inhibiting acetylcholinesterase and Butyrylcholinesterase activity. Particularly, the compounds 4e and 4d exhibited IC50 values ranging from 8.6 to 14 nM against AChE lower than the standard drug Donepezil (IC50 49 nM). Best result was found for compound 4e with IC50 of 8.6 nM (for AChE) and 150 nM (for BuChE). Selectivity upto that of Donepezil and even more was observed for 4a, 4c and 4h. Investigation by electron microscopy, transmission electron microscopy and ThT fluorescence assay unveils the fact that synthesized hybrids exhibit amyloid β self-aggregation inhibition. The compounds 4i and 4j revealed highest inhibitory potential, 85.46% and 72.77% at 50 μM respectively; above the standard Aβ disaggregating agent, Curcumin. Their antioxidation profile was also analyzed. Studies from DPPH free radical scavenging assay and ORAC assay depicts molecules to possess low antioxidation profile. Results suggest that triazolopyrimidines are potential candidate for Acetylcholinesterase (AChE), Butyrylcholinesterase (BuChE), and amyloid β aggregation inhibition. In silico ADMET profiling indicates drug-like properties with a very low toxic influence. Such synthesized compounds provide a strong vision for further development of potential anti-Alzheimer's agents.
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Affiliation(s)
- Tarana Umar
- Department of Chemistry, Jamia Millia Islamia (Central University), New Delhi 110025, India
| | - Siddharth Gusain
- Dr. B. R. Ambedkar Centre for Biomedical Research, University of Delhi, New Delhi 110007, India
| | - Md Kausar Raza
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
| | - Shruti Shalini
- Dr. B. R. Ambedkar Centre for Biomedical Research, University of Delhi, New Delhi 110007, India
| | - Jitendra Kumar
- Department of Chemistry, Sardar Vallabhbhai Patel College, Bhabua, Kaimur 821101, V. K. S. U., Ara, Bihar 802301, India
| | - Manisha Tiwari
- Dr. B. R. Ambedkar Centre for Biomedical Research, University of Delhi, New Delhi 110007, India.
| | - Nasimul Hoda
- Department of Chemistry, Jamia Millia Islamia (Central University), New Delhi 110025, India.
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Pandit G, Sahu S, Ajmal P, Tiwari M, Bhangare R. Application of 210Po isotope dating for chronological assessment of organochlorine pesticides in estuarine sediment. Journal of Radiation Research and Applied Sciences 2019. [DOI: 10.1016/j.jrras.2014.03.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- G.G. Pandit
- Environmental Monitoring and Assessment section, Bhabha Atomic Research Centre, Trombay, Mumbai, 400085, India
| | - S.K. Sahu
- Environmental Monitoring and Assessment section, Bhabha Atomic Research Centre, Trombay, Mumbai, 400085, India
| | - P.Y. Ajmal
- Environmental Monitoring and Assessment section, Bhabha Atomic Research Centre, Trombay, Mumbai, 400085, India
| | - M. Tiwari
- Environmental Monitoring and Assessment section, Bhabha Atomic Research Centre, Trombay, Mumbai, 400085, India
| | - R.C. Bhangare
- Environmental Monitoring and Assessment section, Bhabha Atomic Research Centre, Trombay, Mumbai, 400085, India
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Tiwari M, Rathod TD, Ajmal PY, Bhangare RC, Sahu SK. Distribution and characterization of microplastics in beach sand from three different Indian coastal environments. Mar Pollut Bull 2019; 140:262-273. [PMID: 30803642 DOI: 10.1016/j.marpolbul.2019.01.055] [Citation(s) in RCA: 159] [Impact Index Per Article: 31.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Revised: 01/24/2019] [Accepted: 01/24/2019] [Indexed: 05/12/2023]
Abstract
The occurrence of microplastic particles were evaluated on beaches along the Indian coast from three different locations Girgaon Mumbai (Arabian sea coast), Tuticorin, and Dhanushkodi (Bay of Bengal coast). Density separation method was adopted for isolation of microplastics from sand. Isolated microplastics were characterized using three different analytical techniques e.g. fluorescence microscopy (after staining with Nile Red), FTIR and SEM-EDS techniques. Microplastic concentrations in beach sands were from 45 ± 12 # MP kg-1 to 220 ± 50 # MP kg-1 of dry sand. The order of abundance of plastic type was polyethylene (43%) > polyethylene terephthalate (17.3%) ≈ polystyrene (17%) > polypropylene (12.3%) > Others (11%) > polyvinylchloride (1.33%), and very similar profile was observed for all monitored locations. SEM images show microplastics surfaces with characteristic cracks, suggests their polymer aging, mechanical and oxidative weathering, which was found highest for the microplastics collected from Mumbai.
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Affiliation(s)
- M Tiwari
- Environmental Monitoring and Assessment Section, Health Safety and Environment Group, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - T D Rathod
- Environmental Monitoring and Assessment Section, Health Safety and Environment Group, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - P Y Ajmal
- Environmental Monitoring and Assessment Section, Health Safety and Environment Group, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - R C Bhangare
- Environmental Monitoring and Assessment Section, Health Safety and Environment Group, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - S K Sahu
- Environmental Monitoring and Assessment Section, Health Safety and Environment Group, Bhabha Atomic Research Centre, Mumbai 400085, India; Homi Bhabha National Institute, Anushaktinagar, Mumbai 400094, India.
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Bhangare RC, Ajmal PY, Rathod TD, Tiwari M, Sahu SK. Experimental and Theoretical Determination of Henry's Law Constant for Polychlorinated Biphenyls: Its Dependence on Solubility and Degree of Chlorination. Arch Environ Contam Toxicol 2019; 76:142-152. [PMID: 30361943 DOI: 10.1007/s00244-018-0577-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Accepted: 10/15/2018] [Indexed: 06/08/2023]
Abstract
The fate of a pollutant in the environment depends on its interaction with the surroundings. Henry's law constant (HLC) is one of the important properties useful for assessment of environmental risk and estimation of mass transfer of the pollutant between water and air. Estimation of HLC is relatively a difficult task for many of the organic pollutants due to their very low aqueous solubility. People have attempted the measurement of HLC for persistent organic pollutants, such as polychlorinated biphenyls (PCBs), but due to the difficulty in estimation, there is a variation of approximately 2-3 orders of magnitude in reported values of HLC for PCBs in the literature. A study was performed for estimation of HLC for PCBs using the static method with a modification that eliminates any disturbance in equilibrium due to sampling and also avoids removal or addition of material in or out of the system unlike the conventional methods. The results were consistent with the literature values. The experimental values of HLC ranged from 0.004 to 0.08 for different congeners. All of the experimental values were in agreement with the literature values. The experimental data was further used for deriving a correlation equation for theoretical estimation of the HLC from aqueous solubility and chlorination number. The equation gave a very good estimation of HLC values for all the PCBs congeners except single- and double-chlorinated congeners. The theoretically predicted values were also found to be in close agreement with the reported HLC values.
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Affiliation(s)
- R C Bhangare
- Environmental Monitoring and Assessment Section, Health Safety and Environment Group, Bhabha Atomic Research Centre, Mumbai, India
| | - P Y Ajmal
- Environmental Monitoring and Assessment Section, Health Safety and Environment Group, Bhabha Atomic Research Centre, Mumbai, India
| | - T D Rathod
- Environmental Monitoring and Assessment Section, Health Safety and Environment Group, Bhabha Atomic Research Centre, Mumbai, India
| | - M Tiwari
- Environmental Monitoring and Assessment Section, Health Safety and Environment Group, Bhabha Atomic Research Centre, Mumbai, India
| | - S K Sahu
- Environmental Monitoring and Assessment Section, Health Safety and Environment Group, Bhabha Atomic Research Centre, Mumbai, India.
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Sui XM, Tiwari M, Greenfeld I, Khalfin RL, Meeuw H, Fiedler B, Wagner HD. Extreme scale-dependent tensile properties of epoxy fibers. EXPRESS POLYM LETT 2019. [DOI: 10.3144/expresspolymlett.2019.86] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Mishra CB, Kumari S, Siraj F, Yadav R, Kumari S, Tiwari AK, Tiwari M. The anti-epileptogenic and cognition enhancing effect of novel 1-[4-(4-benzo [1, 3] dioxol-5-ylmethyl-piperazin-1-yl)-phenyl]-3-phenyl-urea (BPPU) in pentylenetetrazole induced chronic rat model of epilepsy. Biomed Pharmacother 2018; 105:470-480. [DOI: 10.1016/j.biopha.2018.05.140] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2017] [Revised: 05/26/2018] [Accepted: 05/28/2018] [Indexed: 10/14/2022] Open
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Umar T, Shalini S, Raza MK, Gusain S, Kumar J, Ahmed W, Tiwari M, Hoda N. New amyloid beta-disaggregating agents: synthesis, pharmacological evaluation, crystal structure and molecular docking of N-(4-((7-chloroquinolin-4-yl)oxy)-3-ethoxybenzyl)amines. Medchemcomm 2018; 9:1891-1904. [PMID: 30568757 DOI: 10.1039/c8md00312b] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2018] [Accepted: 08/06/2018] [Indexed: 11/21/2022]
Abstract
In the journey towards the development of potent multi-targeted ligands for the treatment of Alzheimer's disease, a series of Aβ aggregation inhibitors having quinoline scaffold were designed utilizing computational biology tools, synthesized and characterized by various spectral techniques including single-crystal X-ray crystallography. Organic syntheses relying upon convergent synthetic routes were employed. Investigations via ThT fluorescence assay, electron microscopy and transmission electron microscopy revealed the synthesized derivatives to exhibit Aβ self-aggregation inhibition. Molecules 5g and 5a showed the highest inhibitory potential, 53.73% and 53.63% at 50 μM respectively; higher than the standard Aβ disaggregating agent, curcumin. Molecules 5g and 5a disaggregated AChE-induced (58.26%, 47.36%) Aβ aggregation more than two fold more than the standard drug-donepezil (23.66%) and inhibited Cu2+-induced Aβ aggregation. A docking study significantly showed their interaction with key residues of Aβ and the results were in accordance with the study. Besides, these compounds also exhibited potential antioxidant activity (5a, 2.7240 Trolox equivalent by ORAC assay) and metal chelating property. Furthermore, the stoichiometric ratio of Cu (ii)-5a and Cu(ii)-5g complexes were found by Job's method (0.5 : 1 for 5a and 0.8 : 1 for 5g). In silico ADMET profiling showed these derivatives to have drug like properties with very low toxicity effects in the pharmacokinetic study. Overall, these results displayed a multi-activity profile with promising Aβ aggregation inhibition and antioxidation and metal chelation activity that could be helpful for developing new multifunctional agents against Alzheimer's disease.
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Affiliation(s)
- Tarana Umar
- Department of Chemistry , Jamia Millia Islamia (Central University) , New Delhi 110025 , India .
| | - Shruti Shalini
- Dr. B. R. Ambedkar Centre for Biomedical Research , University of Delhi , New Delhi 110007 , India .
| | - Md Kausar Raza
- Department of Inorganic and Physical Chemistry , Indian Institute of Science , Bangalore 560012 , India
| | - Siddharth Gusain
- Dr. B. R. Ambedkar Centre for Biomedical Research , University of Delhi , New Delhi 110007 , India .
| | - Jitendra Kumar
- Department of Chemistry , Sardar Vallabhbhai Patel College , Kaimur- 821101, V. K. S. U., Ara , Bhabua , Bihar-802301 , India
| | - Waqar Ahmed
- Department of Chemistry , Jamia Millia Islamia (Central University) , New Delhi 110025 , India .
| | - Manisha Tiwari
- Dr. B. R. Ambedkar Centre for Biomedical Research , University of Delhi , New Delhi 110007 , India .
| | - Nasimul Hoda
- Department of Chemistry , Jamia Millia Islamia (Central University) , New Delhi 110025 , India .
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Mishra CB, Kumari S, Angeli A, Bua S, Buonanno M, Monti SM, Tiwari M, Supuran CT. Discovery of potent anti-convulsant carbonic anhydrase inhibitors: Design, synthesis, in vitro and in vivo appraisal. Eur J Med Chem 2018; 156:430-443. [PMID: 30015076 DOI: 10.1016/j.ejmech.2018.07.019] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Revised: 07/05/2018] [Accepted: 07/07/2018] [Indexed: 12/25/2022]
Abstract
We report the design, synthesis and pharmacological assessment of novel benzenesulfonamide derivatives acting as effective carbonic anhydrase (CA, EC 4.2.1.1) inhibitors. All the synthesized compounds were screened for their CA inhibitory action against four isoforms of human origin (h), i.e. hCA I, hCA II, hCA VII and hCA IX. In-vitro carbonic anhydrase inhibition studies have shown that first series, 4-(2-(4-(4-substitutedpiperazin-1-yl)benzylidene)hydrazinyl)benzenesulfonamides (4a- 4i) bestowed low nanomolar range to medium nanomolar range inhibitors against hCA II and hCA VII, effectively involved in epileptogenesis. Furthermore, compounds belonging to the second series, 4-(2-(4-(4-substitutedpiperazin-yl)benzylidene)hydrazinecarbonyl)benzenesulfonamides (8a-8k) showed effective inhibition against hCA VII, being less effective against other hCA isoforms. Inspiring with obtained CA inhibition results, we have chosen some of the potent hCA II and hCA VII inhibitors (4g, 4i and 8d) to test their anti-convulsant efficacy in MES and sc-PTZ seizure tests in Swiss Albino male mice. In result, these compounds significantly attenuated both electrical (MES) as well as chemical (sc-PTZ) induced seizures. Next, in advance anticonvulsant tests, compound 8d displayed long duration of action in time course study and successfully attenuated MES induced seizure in mice up to 6 h after drug administration without showing neurotoxicity in rotarod test. Moreover, this compound was also found to be orally active and effectively abolished generalized tonic-clonic seizures in male Wistar rats upon oral administration, being non-toxic in sub acute toxicity studies.
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Affiliation(s)
- Chandra Bhushan Mishra
- Bio-Organic Chemistry Laboratory, Dr. B. R. Ambedkar Centre for Biomedical Research, University of Delhi, 110007, Delhi, India
| | - Shikha Kumari
- Bio-Organic Chemistry Laboratory, Dr. B. R. Ambedkar Centre for Biomedical Research, University of Delhi, 110007, Delhi, India
| | - Andrea Angeli
- Dipartimento Neurofarba, Universita` degli Studi di Firenze, Sezione di Scienze Farmaceutiche e Nutraceutiche, 50019, Sesto Fiorentino, Florence, Italy
| | - Silvia Bua
- Dipartimento Neurofarba, Universita` degli Studi di Firenze, Sezione di Scienze Farmaceutiche e Nutraceutiche, 50019, Sesto Fiorentino, Florence, Italy
| | - Martina Buonanno
- Institute of Biostructures and Bioimaging, CNR, via Mezzocannone, 16, 80134, Naples, Italy
| | - Simona Maria Monti
- Institute of Biostructures and Bioimaging, CNR, via Mezzocannone, 16, 80134, Naples, Italy
| | - Manisha Tiwari
- Bio-Organic Chemistry Laboratory, Dr. B. R. Ambedkar Centre for Biomedical Research, University of Delhi, 110007, Delhi, India.
| | - Claudiu T Supuran
- Dipartimento Neurofarba, Universita` degli Studi di Firenze, Sezione di Scienze Farmaceutiche e Nutraceutiche, 50019, Sesto Fiorentino, Florence, Italy.
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Mohan M, Sreelakshmi U, Vishnu Sagar MK, Gopikrishna VG, Pandit GG, Sahu SK, Tiwari M, Ajmal PY, Kannan VM, Abdul Shukkur M, Krishnan KP. Rate of sediment accumulation and historic metal contamination in a tidewater glacier fjord, Svalbard. Mar Pollut Bull 2018; 131:453-459. [PMID: 29886971 DOI: 10.1016/j.marpolbul.2018.04.057] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Revised: 04/13/2018] [Accepted: 04/25/2018] [Indexed: 06/08/2023]
Abstract
The sedimentation rates in Arctic fjords are influenced by the changes in the glacial inputs. The recent studies have indicated the retreat of glaciers due to climate change and subsequent increase in melt water outflow with high content of debris. The debris may contain natural and anthropogenically originated contaminants. The present study analysed the sedimentation rate in inner Kongsfjorden, Ny-Ålesund, Svalbard using 210Pb/210Po dating technique. The sedimentation rate ranged between 0.22 and 0.37 cm/year during the last 112 years. The average sedimentation rate obtained was 0.28 cm/y. The rate has been increased during the last 20 years and it might be due to the increased influx of glacial melt water containing debris. Metals and other elements showed an increasing trend towards the surface and observed high deposition rate since 1970s, indicating influence of industrial emissions and it can be a potential threat to Arctic biota.
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Affiliation(s)
- Mahesh Mohan
- School of Environmental Sciences, Mahatma Gandhi University, Kottayam 686560, Kerala, India.
| | - U Sreelakshmi
- School of Environmental Sciences, Mahatma Gandhi University, Kottayam 686560, Kerala, India
| | - M K Vishnu Sagar
- School of Environmental Sciences, Mahatma Gandhi University, Kottayam 686560, Kerala, India
| | - V G Gopikrishna
- School of Environmental Sciences, Mahatma Gandhi University, Kottayam 686560, Kerala, India
| | - G G Pandit
- Environmental Monitoring and Assessment Section, Bhabha Atomic Research Centre, Mumbai, India
| | - S K Sahu
- Environmental Monitoring and Assessment Section, Bhabha Atomic Research Centre, Mumbai, India
| | - M Tiwari
- Environmental Monitoring and Assessment Section, Bhabha Atomic Research Centre, Mumbai, India
| | - P Y Ajmal
- Environmental Monitoring and Assessment Section, Bhabha Atomic Research Centre, Mumbai, India
| | - V M Kannan
- School of Environmental Sciences, Mahatma Gandhi University, Kottayam 686560, Kerala, India
| | - M Abdul Shukkur
- School of Environmental Sciences, Mahatma Gandhi University, Kottayam 686560, Kerala, India
| | - K P Krishnan
- National Centre for Antarctic and Ocean Research, Goa, India
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Mishra CB, Kumari S, Prakash A, Yadav R, Tiwari AK, Pandey P, Tiwari M. Discovery of novel Methylsulfonyl phenyl derivatives as potent human Cyclooxygenase-2 inhibitors with effective anticonvulsant action: Design, synthesis, in-silico, in-vitro and in-vivo evaluation. Eur J Med Chem 2018; 151:520-532. [DOI: 10.1016/j.ejmech.2018.04.007] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2017] [Revised: 02/28/2018] [Accepted: 04/02/2018] [Indexed: 02/07/2023]
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Rathod T, Tiwari M, Maity S, Sahu S, Pandit G. Multi-element detection in sea water using preconcentration procedure and EDXRF technique. Appl Radiat Isot 2018; 135:57-60. [DOI: 10.1016/j.apradiso.2018.01.014] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2017] [Revised: 11/22/2017] [Accepted: 01/12/2018] [Indexed: 11/28/2022]
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Mishra CB, Kumari S, Angeli A, Bua S, Tiwari M, Supuran CT. Discovery of Benzenesulfonamide Derivatives as Carbonic Anhydrase Inhibitors with Effective Anticonvulsant Action: Design, Synthesis, and Pharmacological Evaluation. J Med Chem 2018; 61:3151-3165. [PMID: 29566486 DOI: 10.1021/acs.jmedchem.8b00208] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Two series of novel benzenesulfonamide derivatives were synthesized and evaluated for their human carbonic anhydrase (CA, EC 4.2.1.1) inhibitory activity against four isoforms, hCA I, hCA II, hCA VII, and hCA IX. It was found that compounds of both series showed low to medium nanomolar inhibitory potential against all isoforms. Some of these derivatives displayed selective inhibition against the epileptogenesis related isoforms hCA II and VII, within the nanomolar range. These potent hCA II and VII inhibitors were evaluated as anticonvulsant agents against MES and sc-PTZ induced convulsions. These sulfonamides effectively abolished induced seizures in both models. Furthermore, time dependent seizure protection capability of the most potent compound was also evaluated. A long duration of action was displayed, with efficacy up to 6 h after drug administration. The compound appeared as an orally active anticonvulsant agent without showing neurotoxicity in a rotarod test, a nontoxic chemical profile being observed in subacute toxicity study.
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Affiliation(s)
- Chandra Bhushan Mishra
- Bio-Organic Chemistry Laboratory, Dr. B. R. Ambedkar Center for Biomedical Research , University of Delhi , 110007 Delhi , India
| | - Shikha Kumari
- Bio-Organic Chemistry Laboratory, Dr. B. R. Ambedkar Center for Biomedical Research , University of Delhi , 110007 Delhi , India
| | - Andrea Angeli
- Dipartimento Neurofarba, Sezione di Scienze Farmaceutiche e Nutraceutiche , Università degli Studi di Firenze , 50019 Florence , Italy
| | - Silvia Bua
- Dipartimento Neurofarba, Sezione di Scienze Farmaceutiche e Nutraceutiche , Università degli Studi di Firenze , 50019 Florence , Italy
| | - Manisha Tiwari
- Bio-Organic Chemistry Laboratory, Dr. B. R. Ambedkar Center for Biomedical Research , University of Delhi , 110007 Delhi , India
| | - Claudiu T Supuran
- Dipartimento Neurofarba, Sezione di Scienze Farmaceutiche e Nutraceutiche , Università degli Studi di Firenze , 50019 Florence , Italy
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Srivastav VK, Tiwari M, Zhang X, Yao XJ. Synthesis and Antiretroviral Activity of 6-Acetyl-coumarin Derivatives against HIV-1 Infection. Indian J Pharm Sci 2018. [DOI: 10.4172/pharmaceutical-sciences.1000335] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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41
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Singh A, Gotherwal V, Junni P, Vijayan V, Tiwari M, Ganju P, Kumar A, Sharma P, Fatima T, Gupta A, Holla A, Kar HK, Khanna S, Thukral L, Malik G, Natarajan K, Gadgil CJ, Lahesmaa R, Natarajan VT, Rani R, Gokhale RS. Mapping architectural and transcriptional alterations in non-lesional and lesional epidermis in vitiligo. Sci Rep 2017; 7:9860. [PMID: 28852211 PMCID: PMC5575244 DOI: 10.1038/s41598-017-10253-w] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Accepted: 08/08/2017] [Indexed: 01/31/2023] Open
Abstract
In vitiligo, chronic loss of melanocytes and consequent absence of melanin from the epidermis presents a challenge for long-term tissue maintenance. The stable vitiligo patches are known to attain an irreversible depigmented state. However, the molecular and cellular processes resulting in this remodeled tissue homeostasis is unclear. To investigate the complex interplay of inductive signals and cell intrinsic factors that support the new acquired state, we compared the matched lesional and non-lesional epidermis obtained from stable non-segmental vitiligo subjects. Hierarchical clustering of genome-wide expression of transcripts surprisingly segregated lesional and non-lesional samples in two distinct clades, despite the apparent heterogeneity in the lesions of different vitiligo subjects. Pathway enrichment showed the expected downregulation of melanogenic pathway and a significant downregulation of cornification and keratinocyte differentiation processes. These perturbations could indeed be recapitulated in the lesional epidermal tissue, including blunting of rete-ridges, thickening of stratum corneum and increase in the size of corneocytes. In addition, we identify marked increase in the putrescine levels due to the elevated expression of spermine/spermidine acetyl transferase. Our study provides insights into the intrinsic self-renewing ability of damaged lesional tissue to restore epidermal functionality in vitiligo.
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Affiliation(s)
- Archana Singh
- CSIR-Institute of Genomics and Integrative Biology, Mathura Road, New Delhi, India
| | - Vishvabandhu Gotherwal
- CSIR-Institute of Genomics and Integrative Biology, Mathura Road, New Delhi, India.,Academy of Scientific and Innovative Research, New Delhi, India
| | - Päivi Junni
- Turku Centre for Biotechnology, University of Turku and ÅboAkademi University, Turku, Finland
| | - Vinaya Vijayan
- CSIR-National Chemical Laboratory, Chemical Engineering Division, Pune, India
| | - Manisha Tiwari
- CSIR-Institute of Genomics and Integrative Biology, Mathura Road, New Delhi, India
| | - Parul Ganju
- National Institute of Immunology, ArunaAsaf Ali Marg, New Delhi, India
| | - Avinash Kumar
- National Institute of Immunology, ArunaAsaf Ali Marg, New Delhi, India
| | - Pankaj Sharma
- Department of Dermatology, Post Graduate Institute for Medical Education and Research (PGIMER), Dr. Ram Manohar Lohia Hospital, New Delhi, India
| | - Tanveer Fatima
- Department of Dermatology, Post Graduate Institute for Medical Education and Research (PGIMER), Dr. Ram Manohar Lohia Hospital, New Delhi, India
| | - Aayush Gupta
- Department of Dermatology, Dr. D. Y. Patil Medical College, Pimpri, Pune, India
| | - Ananthaprasad Holla
- MelanoSite, Center for Advanced Vitiligo Treatment and Collaborative Pigment Cell Research, New Delhi, India
| | - Hemanta K Kar
- Department of Dermatology, Post Graduate Institute for Medical Education and Research (PGIMER), Dr. Ram Manohar Lohia Hospital, New Delhi, India
| | - Sangeeta Khanna
- CSIR-Institute of Genomics and Integrative Biology, Mathura Road, New Delhi, India
| | - Lipi Thukral
- CSIR-Institute of Genomics and Integrative Biology, Mathura Road, New Delhi, India
| | - Garima Malik
- CSIR-Institute of Genomics and Integrative Biology, Mathura Road, New Delhi, India
| | | | - Chetan J Gadgil
- CSIR-National Chemical Laboratory, Chemical Engineering Division, Pune, India
| | - Riitta Lahesmaa
- Turku Centre for Biotechnology, University of Turku and ÅboAkademi University, Turku, Finland
| | - Vivek T Natarajan
- CSIR-Institute of Genomics and Integrative Biology, Mathura Road, New Delhi, India. .,Academy of Scientific and Innovative Research, New Delhi, India.
| | - Rajni Rani
- National Institute of Immunology, ArunaAsaf Ali Marg, New Delhi, India.
| | - Rajesh S Gokhale
- CSIR-Institute of Genomics and Integrative Biology, Mathura Road, New Delhi, India. .,National Institute of Immunology, ArunaAsaf Ali Marg, New Delhi, India. .,CSIR-National Chemical Laboratory, Chemical Engineering Division, Pune, India. .,Jawaharlal Nehru Centre for Advanced Scientific Research, Bengaluru, India.
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Tiwari M, Oasa S, Yamamoto J, Mikuni S, Kinjo M. A Quantitative Study of Internal and External Interactions of Homodimeric Glucocorticoid Receptor Using Fluorescence Cross-Correlation Spectroscopy in a Live Cell. Sci Rep 2017; 7:4336. [PMID: 28659593 PMCID: PMC5489515 DOI: 10.1038/s41598-017-04499-7] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2016] [Accepted: 05/18/2017] [Indexed: 01/16/2023] Open
Abstract
Glucocorticoid receptor (GRα) is a well-known ligand-dependent transcription-regulatory protein. The classic view is that unliganded GRα resides in the cytoplasm, relocates to the nucleus after ligand binding, and then associates with a specific DNA sequence, namely a glucocorticoid response element (GRE), to activate a specific gene as a homodimer. It is still a puzzle, however, whether GRα forms the homodimer in the cytoplasm or in the nucleus before DNA binding or after that. To quantify the homodimerization of GRα, we constructed the spectrally different fluorescent protein tagged hGRα and applied fluorescence cross-correlation spectroscopy. First, the dissociation constant (Kd) of mCherry2-fused hGRα or EGFP-fused hGRα was determined in vitro. Then, Kd of wild-type hGRα was found to be 3.00 μM in the nucleus, which was higher than that in vitro. Kd of a DNA-binding-deficient mutant was 3.51 μM in the nucleus. This similarity indicated that GRα homodimerization was not necessary for DNA binding but could take place on GRE by means of GRE as a scaffold. Moreover, cytoplasmic homodimerization was also observed using GRα mutated in the nuclear localization signal. These findings support the existence of a dynamic monomer pathway and regulation of GRα function both in the cytoplasm and nucleus.
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Affiliation(s)
- Manisha Tiwari
- Laboratory of Molecular Cell Dynamics, Faculty of Advanced Life Science, Hokkaido University, Sapporo, 001-0021, Japan
| | - Sho Oasa
- Laboratory of Molecular Cell Dynamics, Faculty of Advanced Life Science, Hokkaido University, Sapporo, 001-0021, Japan
| | - Johtaro Yamamoto
- Laboratory of Molecular Cell Dynamics, Faculty of Advanced Life Science, Hokkaido University, Sapporo, 001-0021, Japan
| | - Shintaro Mikuni
- Laboratory of Molecular Cell Dynamics, Faculty of Advanced Life Science, Hokkaido University, Sapporo, 001-0021, Japan
| | - Masataka Kinjo
- Laboratory of Molecular Cell Dynamics, Faculty of Advanced Life Science, Hokkaido University, Sapporo, 001-0021, Japan.
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Kainthola A, Haritwal T, Tiwari M, Gupta N, Parvez S, Tiwari M, Prakash H, Agrawala PK. Immunological Aspect of Radiation-Induced Pneumonitis, Current Treatment Strategies, and Future Prospects. Front Immunol 2017; 8:506. [PMID: 28512460 PMCID: PMC5411429 DOI: 10.3389/fimmu.2017.00506] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2016] [Accepted: 04/12/2017] [Indexed: 12/21/2022] Open
Abstract
Delivery of high doses of radiation to thoracic region, particularly with non-small cell lung cancer patients, becomes difficult due to subsequent complications arising in the lungs of the patient. Radiation-induced pneumonitis is an early event evident in most radiation exposed patients observed within 2-4 months of treatment and leading to fibrosis later. Several cytokines and inflammatory molecules interplay in the vicinity of the tissue developing radiation injury leading to pneumonitis and fibrosis. While certain cytokines may be exploited as biomarkers, they also appear to be a potent target of intervention at transcriptional level. Initiation and progression of pneumonitis and fibrosis thus are dynamic processes arising after few months to year after irradiation of the lung tissue. Currently, available treatment strategies are challenged by the major dose limiting complications that curtails success of the treatment as well as well being of the patient's future life. Several approaches have been in practice while many other are still being explored to overcome such complications. The current review gives a brief account of the immunological aspects, existing management practices, and suggests possible futuristic approaches.
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Affiliation(s)
- Anup Kainthola
- Department of Radiation Genetics and Epigenetics, Institute of Nuclear Medicine and Allied Sciences, Delhi, India
| | - Teena Haritwal
- Department of Radiation Genetics and Epigenetics, Institute of Nuclear Medicine and Allied Sciences, Delhi, India
| | - Mrinialini Tiwari
- Department of Radiation Genetics and Epigenetics, Institute of Nuclear Medicine and Allied Sciences, Delhi, India
| | - Noopur Gupta
- Department of Radiation Genetics and Epigenetics, Institute of Nuclear Medicine and Allied Sciences, Delhi, India
| | - Suhel Parvez
- Department of Toxicology, School of Chemical and Life Sciences, Jamia Hamdard University, New Delhi, India
| | - Manisha Tiwari
- Ambedkar Center for Biomedical Research, University of Delhi, Delhi, India
| | - Hrideysh Prakash
- School of Life Sciences, Science complex, University of Hyderabad, Hyderabad, India
| | - Paban K. Agrawala
- Department of Radiation Genetics and Epigenetics, Institute of Nuclear Medicine and Allied Sciences, Delhi, India
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Jameel E, Meena P, Maqbool M, Kumar J, Ahmed W, Mumtazuddin S, Tiwari M, Hoda N, Jayaram B. Rational design, synthesis and biological screening of triazine-triazolopyrimidine hybrids as multitarget anti-Alzheimer agents. Eur J Med Chem 2017; 136:36-51. [PMID: 28478343 DOI: 10.1016/j.ejmech.2017.04.064] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [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: 01/26/2017] [Revised: 04/02/2017] [Accepted: 04/23/2017] [Indexed: 12/22/2022]
Abstract
In our endeavor towards the development of potent multitarget ligands for the treatment of Alzheimer's disease, a series of triazine-triazolopyrimidine hybrids were designed, synthesized and characterized by various spectral techniques. Docking and scoring techniques were used to design the inhibitors and to display their interaction with key residues of active site. Organic synthesis relied upon convergent synthetic routes were mono and di-substituted triazines were connected with triazolopyrimidine using piperazine as a linker. In total, seventeen compounds were synthesized in which the di-substituted triazine-triazolopyrimidine derivatives 9a-d showed better acetylcholinesterase (AChE) inhibitory activity than the corresponding tri-substituted triazine-triazolopyrimidine derivatives 10a-f. Out of the disubstituted triazine-triazolopyrimidine based compounds, 9a and 9b showed encouraging inhibitory activity on AChE with IC50 values 0.065 and 0.092 μM, respectively. Interestingly, 9a and 9b also demonstrated good inhibition selectivity towards AChE over BuChE by ∼28 folds. Furthermore, kinetic analysis and molecular modeling studies showed that 9a and 9b target both catalytic active site as well as peripheral anionic site of AChE. In addition, these derivatives effectively modulated Aβ self-aggregation as investigated through CD spectroscopy, ThT fluorescence assay and electron microscopy. Besides, these compounds exhibited potential antioxidants (2.15 and 2.91 trolox equivalent by ORAC assay) and metal chelating properties. In silico ADMET profiling highlighted that, these novel triazine derivatives have appropriate drug like properties and possess very low toxic effects in the primarily pharmacokinetic study. Overall, the multitarget profile exerted by these novel triazine molecules qualified them as potential anti-Alzheimer drug candidates in AD therapy.
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Affiliation(s)
- Ehtesham Jameel
- Department of Chemistry, Jamia Millia Islamia (Central University), Jamia Nagar, New Delhi 110025, India
| | - Poonam Meena
- Dr. B. R. Ambedkar Centre for Biomedical Research, University of Delhi, New Delhi 110007, India
| | - Mudasir Maqbool
- Department of Chemistry, Jamia Millia Islamia (Central University), Jamia Nagar, New Delhi 110025, India
| | - Jitendra Kumar
- Department of Chemistry, Jamia Millia Islamia (Central University), Jamia Nagar, New Delhi 110025, India
| | - Waqar Ahmed
- Department of Chemistry, Jamia Millia Islamia (Central University), Jamia Nagar, New Delhi 110025, India
| | - Syed Mumtazuddin
- Department of Chemistry, B. R. Ambedkar Bihar University, Muzaffarpur 842001, Bihar, India
| | - Manisha Tiwari
- Dr. B. R. Ambedkar Centre for Biomedical Research, University of Delhi, New Delhi 110007, India.
| | - Nasimul Hoda
- Department of Chemistry, Jamia Millia Islamia (Central University), Jamia Nagar, New Delhi 110025, India.
| | - B Jayaram
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India; Kusuma School of Biological Sciences, IIT Delhi, New Delhi 110016, India; Supercomputing Facility for Bioinformatics & Computational Biology, IIT Delhi, New Delhi 110016, India
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Mishra CB, Kumari S, Angeli A, Monti SM, Buonanno M, Tiwari M, Supuran CT. Discovery of Benzenesulfonamides with Potent Human Carbonic Anhydrase Inhibitory and Effective Anticonvulsant Action: Design, Synthesis, and Pharmacological Assessment. J Med Chem 2017; 60:2456-2469. [PMID: 28253618 DOI: 10.1021/acs.jmedchem.6b01804] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
We report two series of novel benzenesulfonamide derivatives acting as effective carbonic anhydrase (CA, EC 4.2.1.1) inhibitors. The synthesized compounds were tested against human (h) isoforms hCA I, hCA II, hCA VII, and hCA XII. The first series of compounds, 4-(3-(2-(4-substitued piperazin-1-yl)ethyl)ureido)benzenesulfonamides, showed low nanomolar inhibitory action against hCA II, being less effective against the other isoforms. The second series, 2-(4-substitued piperazin-1-yl)-N-(4-sulfamoylphenyl)acetamide derivatives, showed low nanomolar inhibitory activity against hCA II and hCA VII, isoforms involved in epileptogenesis. Some of these derivatives were evaluated for their anticonvulsant activity and displayed effective seizure protection against MES and scPTZ induced seizures in Swiss Albino mice. These sulfonamides were also found effective upon oral administration to Wistar rats and inhibited MES induced seizure episodes in this animal model of the disease. Some of the new compounds showed a long duration of action in the performed time course anticonvulsant studies, being nontoxic in subacute toxicity studies.
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Affiliation(s)
- Chandra Bhushan Mishra
- Bio-Organic Chemistry Laboratory, Dr. B. R. Ambedkar Centre for Biomedical Research, University of Delhi , Delhi, India
| | - Shikha Kumari
- Bio-Organic Chemistry Laboratory, Dr. B. R. Ambedkar Centre for Biomedical Research, University of Delhi , Delhi, India
| | - Andrea Angeli
- Dipartimento Neurofarba, Università degli Studi di Firenze, Sezione di Scienze Farmaceutiche e Nutraceutiche , Florence, Italy
| | - Simona Maria Monti
- Istituto di Biostrutture e Bioimmagini (IBB) CNR ,via Mezzocannone, Naples, Italy
| | - Martina Buonanno
- Istituto di Biostrutture e Bioimmagini (IBB) CNR ,via Mezzocannone, Naples, Italy
| | - Manisha Tiwari
- Bio-Organic Chemistry Laboratory, Dr. B. R. Ambedkar Centre for Biomedical Research, University of Delhi , Delhi, India
| | - Claudiu T Supuran
- Dipartimento Neurofarba, Università degli Studi di Firenze, Sezione di Scienze Farmaceutiche e Nutraceutiche , Florence, Italy
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Mishra CB, Mongre RK, Kumari S, Jeong DK, Tiwari M. Novel Triazole-Piperazine Hybrid Molecules Induce Apoptosis via Activation of the Mitochondrial Pathway and Exhibit Antitumor Efficacy in Osteosarcoma Xenograft Nude Mice Model. ACS Chem Biol 2017; 12:753-768. [PMID: 28084722 DOI: 10.1021/acschembio.6b01007] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Mitochondria impart a crucial role in the regulation of programmed cell death and reactive oxygen species (ROS) generation, besides serving as a primary energy source. Mitochondria appeared as an important target for the therapy of cancer due to their significant contribution to cell survival and death. Here, we report the design and synthesis of a novel series of triazole-piperazine hybrids as potent anticancer agents. MCS-5 emerged as an excellent anticancer agent which showed better anticancer activity than the standard drug doxorubicin in in vitro and in vivo studies. MCS-5 displayed an IC50 value of 1.92 μM and induced apoptosis in Cal72 (human osteosarcoma cell line) cells by targeting the mitochondrial pathway. This compound arrested the G2/M phase of the cell cycle and induced ROS production and mitochondrial potential collapse in Cal72 cells. MCS-5 displayed excellent anticancer activity in the Cal72 xenograft nude mice model, where it significantly reduced tumor progression, leading to enhanced life span in treated animals compared to control and doxorubicin treated animals without exerting noticeable toxicity. In addition, a 2DG optical probe guided study clearly evoked that MCS-5 remarkably reduced tumor metastasis in the Cal72 xenograft nude mice model. These results indicate that MCS-5 appeared as a novel chemical entity which is endowed with excellent in vitro as well as in vivo anticancer activity and may contribute significantly to the management of cancer in the future.
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Affiliation(s)
- Chandra Bhushan Mishra
- Bio-organic
Chemistry Laboratory, Dr. B.R. Ambedkar Center for Biomedical Research, University of Delhi, Delhi 110007, India
| | - Raj Kumar Mongre
- Laboratory
of Animal Genetic Engineering and Stem Cell Biology, Department of
Animal Biotechnology and Advance Next Generation Convergence, Faculty
of Biotechnology, Jeju National University, Jeju-Do, Republic of Korea
| | - Shikha Kumari
- Bio-organic
Chemistry Laboratory, Dr. B.R. Ambedkar Center for Biomedical Research, University of Delhi, Delhi 110007, India
| | - Dong Kee Jeong
- Laboratory
of Animal Genetic Engineering and Stem Cell Biology, Department of
Animal Biotechnology and Advance Next Generation Convergence, Faculty
of Biotechnology, Jeju National University, Jeju-Do, Republic of Korea
| | - Manisha Tiwari
- Laboratory
of Animal Genetic Engineering and Stem Cell Biology, Department of
Animal Biotechnology and Advance Next Generation Convergence, Faculty
of Biotechnology, Jeju National University, Jeju-Do, Republic of Korea
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Saini V, Manral A, Arora R, Meena P, Gusain S, Saluja D, Tiwari M. Novel synthetic analogs of diallyl disulfide triggers cell cycle arrest and apoptosis via ROS generation in MIA PaCa-2 cells. Pharmacol Rep 2017; 69:813-821. [PMID: 28591670 DOI: 10.1016/j.pharep.2017.03.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [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: 09/09/2016] [Revised: 02/06/2017] [Accepted: 03/10/2017] [Indexed: 11/16/2022]
Abstract
BACKGROUND Diallyl disulfide (DADS), a principal organosulfur component of garlic, is known for its medicinal properties including anti-cancer activity. Prior studies have demonstrated that the compounds containing Diallyl disulfide moieties exhibited diverse therapeutic potential with promising biological activities. In the present study, we have investigated the in vitro anticancer activity of Diallyl disulfide derivatives (5a-5l and 7e-7m) against human cancer cell lines. METHODS The effect of DADS analogs on different cancer cell lines was measured through MTT assay. Cell cycle progression, apoptosis, DNA fragmentation and levels of ROS were analyzed through FACS and confocal imaging. RESULTS Bis[3-(3-fluorophenyl)prop-2-ene]disulfide (compound 5b) was the most potent compound among the tested DADS derivatives. FACS analysis revealed that increase in ROS generation by compound 5b was accompanied by cell cycle arrest in the G2/M phase and apoptosis in MIA PaCa-2 cells. Further, the apoptosis was confirmed by TUNEL assay. Western blot analysis showed that compound 5b induces G2/M phase arrest via ROS mediated DNA-damage, which in turn, induces phosphorylation of Chk1/Cdc25c/Cdc2 pathway. Furthermore, altered levels of ROS triggers intrinsic apoptotic cascade, as evidenced by dissipated mitochondrial membrane potential (ψ), decrease in Bcl-2/Bax ratio, cytochrome c release and cleavage of procaspase-3. Scavenging of ROS by antioxidant N-acetyl-cysteine (NAC) reversed the compound 5b induced augmented intracellular ROS levels and cell death. CONCLUSION Taken together, the anti-proliferative effects of compound 5b were attributed to intracellular ROS accumulation, which in turn, triggers apoptosis by mediating DNA damage-induced G2/M phase arrest and evoking mitochondrial apoptotic pathway in MIA PaCa-2 cells.
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Affiliation(s)
- Vikas Saini
- Bio-Organic Chemistry Laboratory, Dr. B.R. Ambedkar Centre for Biomedical Research, University of Delhi, Delhi, India
| | - Apra Manral
- Bio-Organic Chemistry Laboratory, Dr. B.R. Ambedkar Centre for Biomedical Research, University of Delhi, Delhi, India
| | - Rashi Arora
- Medical Biotechnology Laboratory, Dr. B.R. Ambedkar Centre for Biomedical Research, University of Delhi, Delhi, India
| | - Poonam Meena
- Bio-Organic Chemistry Laboratory, Dr. B.R. Ambedkar Centre for Biomedical Research, University of Delhi, Delhi, India
| | - Siddharth Gusain
- Bio-Organic Chemistry Laboratory, Dr. B.R. Ambedkar Centre for Biomedical Research, University of Delhi, Delhi, India
| | - Daman Saluja
- Medical Biotechnology Laboratory, Dr. B.R. Ambedkar Centre for Biomedical Research, University of Delhi, Delhi, India
| | - Manisha Tiwari
- Bio-Organic Chemistry Laboratory, Dr. B.R. Ambedkar Centre for Biomedical Research, University of Delhi, Delhi, India.
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Tiwari M, Sahu SK, Pandit GG. Distribution of PAHs in different compartment of creek ecosystem: Ecotoxicological concern and human health risk. Environ Toxicol Pharmacol 2017; 50:58-66. [PMID: 28131077 DOI: 10.1016/j.etap.2017.01.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2016] [Revised: 01/09/2017] [Accepted: 01/13/2017] [Indexed: 06/06/2023]
Abstract
We report levels of polycyclic aromatic hydrocarbons in sediment, seawater, fish and crab samples from Thane creek, India. Concentrations of sixteen USEPA PAH in sediments varies from 874 to 1925ngg-1, dry weight (dw) in winter, between 219-495ngg-1 in summer. In seawater Σ16 PAHs concentration during winter was recorded 706±193ngL-1, and during summer 337±79ngL-1. Total concentrations of PAHs in consumable portion of lizard fish, bombay duck and crab were found 156.8±18 and 122±24.5ngg-1, 117.4±17.65ngg-1 and 95.8±16.2ngg-1, 348±94.5 and 95.62±31.9ngg-1 wet weight (ww) in summer and winter respectively. PAHs concentration were compared with sediments quality guidelines viz. ERL-ERM, TEL-PEL indexes for finding ecotoxicological risk on marine organism. The ILCR values were above public screening criteria for carcinogens.
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Affiliation(s)
- M Tiwari
- Environmental Monitoring and Assessment Section, Health Safety and Environment Group, Bhabha Atomic Research Centre Trombay, Mumbai 400085, India
| | - S K Sahu
- Environmental Monitoring and Assessment Section, Health Safety and Environment Group, Bhabha Atomic Research Centre Trombay, Mumbai 400085, India
| | - G G Pandit
- Environmental Monitoring and Assessment Section, Health Safety and Environment Group, Bhabha Atomic Research Centre Trombay, Mumbai 400085, India.
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Kapil S, Bairwa D, Bhagat H, Panda N, Bhukal I, Tiwari M. Time to emergence and factors affecting emergence in patinets with aneurysmal subarachnoid hemorrhage following craniotomy: A prospective observational study. Journal of Neuroanaesthesiology and Critical Care 2017. [DOI: 10.1055/s-0038-1646225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
Affiliation(s)
- S. Kapil
- Department of Anaesthesia and Intensive Care, PGIMER, Chandigarh, India
| | - D. Bairwa
- Department of Anaesthesia and Intensive Care, PGIMER, Chandigarh, India
| | - H. Bhagat
- Department of Anaesthesia and Intensive Care, PGIMER, Chandigarh, India
| | - N. Panda
- Department of Anaesthesia and Intensive Care, PGIMER, Chandigarh, India
| | - I. Bhukal
- Department of Anaesthesia and Intensive Care, PGIMER, Chandigarh, India
| | - M. Tiwari
- Neurosurgery, PGIMER, Chandigarh, India
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