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Aadil KR, Nathani A, Rajendran A, Sharma CS, Lenka N, Gupta P. Investigation of human hair keratin-based nanofibrous scaffold for skin tissue engineering application. Drug Deliv Transl Res 2024; 14:236-246. [PMID: 37589816 DOI: 10.1007/s13346-023-01396-7] [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] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/22/2023] [Indexed: 08/18/2023]
Abstract
Keratin-based nanofibers were fabricated using the electrospinning technique, and their potential as scaffolds for tissue engineering was investigated. Keratin, extracted from the human hair, was blended with poly(vinyl alcohol) (PVA) in an aqueous medium. Morphological characterizations of the fabricated PVA-keratin nanofiber (PK-NF) random and aligned scaffolds performed using a scanning electron microscope (SEM) revealed the formation of uniform and randomly oriented nanofibers with an interconnected three-dimensional network structure. The mean diameter of the nanofibers ranged from 100 to 250 nm. Functional groups and structural studies were done by infrared spectroscopy (FTIR) and X-ray diffraction (XRD) analysis. FTIR study suggested that PVA interacted with keratin by hydrogen bonding. Moreover, the in vitro cell culture study could suggest that PK-NF scaffolds were non-cytotoxic by supporting the growth of murine embryonic stem cells (ESCs), human keratinocytes (HaCaT), and dermal fibroblast (NHDF) cell lines. Further, the immunocytochemical characterization revealed the successful infiltration, adhesion, and growth of ESCs, HaCaT, and NHDF cells seeded on PK-NF scaffolds. However, there was no noteworthy difference observed concerning cell growth and viability irrespective of the random and aligned internal fibril arrangement of the PK-NF scaffolds. The infiltration and growth pattern of HaCaT and NHDF cells adjacent to each other in a 3D co-culture study mimicked that of epidermal and dermal skin cells and indeed underscored the potential of PK-NFs as a scaffold for skin tissue engineering.
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Affiliation(s)
- Keshaw R Aadil
- Department of Biotechnology, National Institute of Technology Raipur, Raipur, 492001, Chhattisgarh, India.
- Department of Botany, Govt. Digvijay Autonomous Post-Graduate College, Rajnandgaon, Chhattisgarh, India.
| | - Akash Nathani
- Creative & Advanced Research Based On Nanomaterials (CARBON) Laboratory, Department of Chemical Engineering, Indian Institute of Technology Hyderabad, Kandi, 502285, Telangana, India
| | - Archana Rajendran
- National Centre for Cell Science, Ganeshkhind, Pune, 411007, Maharashtra, India
| | - Chandra S Sharma
- Creative & Advanced Research Based On Nanomaterials (CARBON) Laboratory, Department of Chemical Engineering, Indian Institute of Technology Hyderabad, Kandi, 502285, Telangana, India.
| | - Nibedita Lenka
- National Centre for Cell Science, Ganeshkhind, Pune, 411007, Maharashtra, India.
| | - Pratima Gupta
- Department of Biotechnology, National Institute of Technology Raipur, Raipur, 492001, Chhattisgarh, India.
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2
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Naik KM, Chourasia AK, Shavez M, Sharma CS. Bimetallic RuNi Electrocatalyst Coated MWCNTs Cathode for an Efficient and Stable Li-CO 2 and Li-CO 2 Mars Batteries Performance with Low Overpotential. ChemSusChem 2023; 16:e202300734. [PMID: 37317946 DOI: 10.1002/cssc.202300734] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Revised: 06/09/2023] [Accepted: 06/14/2023] [Indexed: 06/16/2023]
Abstract
Rechargeable lithium-CO2 (Li-CO2 ) batteries are an attractive energy storage technology that can reduce fossil fuel usage and limit the adverse environmental impact of CO2 emissions. However, the high charge overpotential, unstable cycling, and incomplete understanding of the electrochemical process limit its advancement for practical applications. Herein, we develop a Li-CO2 battery by designing a bimetallic ruthenium-nickel catalyst onto multi-walled carbon nanotubes (RuNi/MWCNTs) catalyst as cathode by solvothermal method, which exhibits a lower overpotential of 1.15 V and a discharge capacity of 15,165 mAh g-1 with outstanding coulombic efficiency of 97.4 %. The battery can also operate at high rates and have a stable cycle of more than 80 cycles at a current density of 200 mA g-1 with a fixed 500 mAh g-1 capacity. Furthermore, Mars exploration is made feasible with the Li-CO2 Mars battery composed of the RuNi/MWCNTs as cathode catalyst, which performs very similarly to that of pure CO2 atmosphere. This approach may simplify the process of developing high-performance Li-CO2 batteries to achieve carbon negativity on Earth and for future interplanetary Mars missions.
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Affiliation(s)
- Keerti M Naik
- Creative & Advanced Research Based On Nanomaterials (CARBON) Laboratory, Department of Chemical Engineering, Indian Institute of Technology Hyderabad, Kandi-502285, Sangareddy, Telangana, India
| | - Ankit Kumar Chourasia
- Creative & Advanced Research Based On Nanomaterials (CARBON) Laboratory, Department of Chemical Engineering, Indian Institute of Technology Hyderabad, Kandi-502285, Sangareddy, Telangana, India
| | - Mohd Shavez
- Creative & Advanced Research Based On Nanomaterials (CARBON) Laboratory, Department of Chemical Engineering, Indian Institute of Technology Hyderabad, Kandi-502285, Sangareddy, Telangana, India
| | - Chandra S Sharma
- Creative & Advanced Research Based On Nanomaterials (CARBON) Laboratory, Department of Chemical Engineering, Indian Institute of Technology Hyderabad, Kandi-502285, Sangareddy, Telangana, India
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3
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Mishra SS, Kumar N, Karkara BB, Sharma CS, Kalra S. Identification of potential inhibitors of Zika virus targeting NS3 helicase using molecular dynamics simulations and DFT studies. Mol Divers 2023; 27:1689-1701. [PMID: 36063275 DOI: 10.1007/s11030-022-10522-5] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Accepted: 08/26/2022] [Indexed: 10/14/2022]
Abstract
Despite the various research efforts towards the drug discovery program for Zika virus treatment, no antiviral drugs or vaccines have yet been discovered. The spread of the mosquito vector and ZIKV infection exposure is expected to accelerate globally due to continuing global travel. The NS3-Hel is a non-structural protein part and involved in different functions such as polyprotein processing, genome replication, etc. It makes an NS3-Hel protein an attractive target for designing novel drugs for ZIKV treatment. This investigation identifies the novel, potent ZIKV inhibitors by virtual screening and elucidates the binding pattern using molecular docking and molecular dynamics simulation studies. The molecular dynamics simulation results indicate dynamic stability between protein and ligand complexes, and the structures keep significantly unchanged at the binding site during the simulation period. All inhibitors found within the acceptable range having drug-likeness properties. The synthetic feasibility score suggests that all screened inhibitors can be easily synthesizable. Therefore, possible inhibitors obtained from this study can be considered a potential inhibitor for NS3 Hel, and further, it could be provided as a lead for drug development.
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Affiliation(s)
- Shashank Shekher Mishra
- Department of Pharmaceutical Chemistry, School of Pharmaceutical & Populations Health Informatics, DIT University, Dehradun, 248009, India.
| | - Neeraj Kumar
- Department of Pharmaceutical Chemistry, Bhupal Nobles' College of Pharmacy, Bhupal Nobles' University, Udaipur, 313001, India
| | - Bidhu Bhusan Karkara
- Department of Pharmaceutical Sciences, Vignan's Foundation for Science, Technology and Research, Vadlamudi, Guntur, 522213, India
| | - C S Sharma
- Department of Pharmaceutical Chemistry, Bhupal Nobles' College of Pharmacy, Bhupal Nobles' University, Udaipur, 313001, India
| | - Sourav Kalra
- National Institute of Pharmaceutical Education & Research, Mohali, Punjab, India
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4
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Chourasia AK, Pathak AD, Bongu C, Manikandan K, Praneeth S, Naik KM, Sharma CS. In Situ/Operando Characterization Techniques: The Guiding Tool for the Development of Li-CO 2 Battery. Small Methods 2022; 6:e2200930. [PMID: 36333232 DOI: 10.1002/smtd.202200930] [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] [Subscribe] [Scholar Register] [Received: 07/16/2022] [Revised: 09/29/2022] [Indexed: 06/16/2023]
Abstract
In recent times, the Li-CO2 battery has gained significant importance arising from its higher gravimetric energy density (1876 Wh kg-1 ) compared to the conventional Li-ion batteries. Also, its ability to utilize the greenhouse gas CO2 to operate an energy storage system and the prospective utilization on extraterrestrial planets such as Mars motivate to practicalize it. However, it suffers from numerous challenges such as (i) the reluctant CO2 reduction/evolution; (ii) solid/liquid/gas interface blockage arising from the deposition of Li2 CO3 discharge product on the cathode; (iii) high overpotential to decompose the stable discharge product Li2 CO3 ; and (iv) instability of the electrolytes. Numerous efforts have been undertaken to tackle these challenges by developing catalysts, improving the stability of electrolytes, protecting the anode, etc. Despite these efforts, due to the lack of a decisive confirmation of the reaction mechanisms of the discharging/charging reactions occurring in the system, the progress of the Li-CO2 battery system has been slow. In situ characterization techniques help overcome ex-situ techniques' limitations by monitoring the processes with the progress of a reaction. The current review focuses on bridging the gap in the understanding of the Li-CO2 batteries by exploring the various in situ/operando characterization techniques that have been employed.
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Affiliation(s)
- Ankit K Chourasia
- Creative and Advanced Research Based On Nanomaterials (CARBON) Laboratory, Department of Chemical Engineering, Indian Institute of Technology Hyderabad, Kandi, Telangana, 502285, India
| | - Anil D Pathak
- Creative and Advanced Research Based On Nanomaterials (CARBON) Laboratory, Department of Chemical Engineering, Indian Institute of Technology Hyderabad, Kandi, Telangana, 502285, India
| | - Chandrasekhar Bongu
- Creative and Advanced Research Based On Nanomaterials (CARBON) Laboratory, Department of Chemical Engineering, Indian Institute of Technology Hyderabad, Kandi, Telangana, 502285, India
| | - K Manikandan
- Creative and Advanced Research Based On Nanomaterials (CARBON) Laboratory, Department of Chemical Engineering, Indian Institute of Technology Hyderabad, Kandi, Telangana, 502285, India
| | - Sai Praneeth
- Creative and Advanced Research Based On Nanomaterials (CARBON) Laboratory, Department of Chemical Engineering, Indian Institute of Technology Hyderabad, Kandi, Telangana, 502285, India
| | - Keerti M Naik
- Creative and Advanced Research Based On Nanomaterials (CARBON) Laboratory, Department of Chemical Engineering, Indian Institute of Technology Hyderabad, Kandi, Telangana, 502285, India
| | - Chandra S Sharma
- Creative and Advanced Research Based On Nanomaterials (CARBON) Laboratory, Department of Chemical Engineering, Indian Institute of Technology Hyderabad, Kandi, Telangana, 502285, India
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Kumar SK, Gaikwad MM, Rani P, Pathak AD, Sharma CS. Fe-carbon hybrid composite interlayer for improved electrochemical performance of Li-S battery. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2021.139466] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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6
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Vishnu N, Sihorwala AZ, Sharma CS. Paper Based Low‐Cost and Portable Ultrasensitive Electroanalytical Devicefor The Detection of Uric Acid in Human Urine. ChemistrySelect 2021. [DOI: 10.1002/slct.202101632] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Nandimalla Vishnu
- Department of Chemistry School of Science GITAM Deemed to be University Rudraram 502329 Telangana India
- Creative & Advanced Research Based On Nanomaterials (CARBON) Laboratory Department of Chemical Engineering Indian Institute of Technology Hyderabad Kandi 502285 Telangana India
| | - Ahmed Z. Sihorwala
- Creative & Advanced Research Based On Nanomaterials (CARBON) Laboratory Department of Chemical Engineering Indian Institute of Technology Hyderabad Kandi 502285 Telangana India
| | - Chandra S. Sharma
- Creative & Advanced Research Based On Nanomaterials (CARBON) Laboratory Department of Chemical Engineering Indian Institute of Technology Hyderabad Kandi 502285 Telangana India
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8
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Ruhela A, Kasinathan GN, Rath SN, Sasikala M, Sharma CS. Electrospun freestanding hydrophobic fabric as a potential polymer semi-permeable membrane for islet encapsulation. Mater Sci Eng C Mater Biol Appl 2020; 118:111409. [PMID: 33255012 DOI: 10.1016/j.msec.2020.111409] [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] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 07/04/2020] [Accepted: 08/11/2020] [Indexed: 01/13/2023]
Abstract
One of the significant problems associated with islet encapsulation for type 1 diabetes treatment is the loss of islet functionality or cell death after transplantation because of the unfavorable environment for the cells. In this work, we propose a simple strategy to fabricate electrospun membranes that will provide a favorable environment for proper islet function and also a desirable pore size to cease cellular infiltration, protecting the encapsulated islet from immune cells. By electrospinning the wettability of three different biocompatible polymers: cellulose acetate (CA), polyethersulfone (PES), and polytetrafluoroethylene (PTFE) was greatly modified. The contact angle of electrospun CA, PES, and PTFE increased to 136°, 126°, and 155° as compared to 55°, 71°, and 128° respectively as a thin film, making the electrospun membranes hydrophobic. Commercial porous membranes of PES and PTFE show a contact angle of 30° and 118°, respectively, confirming the hydrophobicity of electrospun membranes is due to the surface morphology induced by electrospinning. In- vivo results confirm that the induced hydrophobicity and surface morphology of electrospun membranes impede cell attachment, which would help in maintaining the 3D circular morphology of islet cell. More importantly, the pore size of 0.3-0.6 μm obtained due to the densely packed structure of nanofibers, will be able to restrict immune cells but would allow free movement of molecules like insulin and glucose. Therefore, electrospun polymer fibrous membranes as fabricated in this work, with hydrophobic and porous properties, make a strong case for successful islet encapsulation.
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Affiliation(s)
- Aakanksha Ruhela
- Creative & Advanced Research Based On Nanomaterials (CARBON) Laboratory, Department of Chemical Engineering, Indian Institute of Technology Hyderabad, Kandi 502285, Telangana, India
| | - Gokula Nathan Kasinathan
- Regenerative Medicine and Stem Cell Laboratory (RMS), Department of Biomedical Engineering, Indian Institute of Technology Hyderabad, Kandi 502285, Telangana, India
| | - Subha N Rath
- Regenerative Medicine and Stem Cell Laboratory (RMS), Department of Biomedical Engineering, Indian Institute of Technology Hyderabad, Kandi 502285, Telangana, India
| | - M Sasikala
- Asian Healthcare Foundation, Gachibowli, Hyderabad 500032, Telangana, India
| | - Chandra S Sharma
- Creative & Advanced Research Based On Nanomaterials (CARBON) Laboratory, Department of Chemical Engineering, Indian Institute of Technology Hyderabad, Kandi 502285, Telangana, India.
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9
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Kushwaha N, Sharma CS. The Chemistry of Triazine Isomers: Structures, Reactions, Synthesis and Applications. Mini Rev Med Chem 2020; 20:2104-2122. [PMID: 32727324 DOI: 10.2174/1389557520666200729160720] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2019] [Revised: 03/25/2020] [Accepted: 05/14/2020] [Indexed: 11/22/2022]
Abstract
Triazine is the six-membered heterocyclic ring containing three nitrogens, which replace the carbon-hydrogen unit in the benzene ring. Based on nitrogen position present in the ring system, it is categorized in three isomeric forms, i.e., 1, 2, 3-triazine (vicinal triazine), 1, 2, 4-triazine (asymmetrical triazine or isotriazine) and 1, 3, 5-triazine (symmetrical or s-triazine or cyanidine). Triazines have a weakly basic property. Their isomers have much weaker resonance energy than benzene structure, so nucleophilic substitution reactions are more preferred than electrophilic substitution reactions. Triazine isomers and their derivatives are known to play important roles possessing various activities in medicinal and agricultural fields such as anti-cancer, antiviral, fungicidal, insecticidal, bactericidal, herbicidal, antimalarial and antimicrobial agents.
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Affiliation(s)
- Neelottama Kushwaha
- Department of Pharmaceutical Chemistry, BN College of Pharmacy, Faculty of Pharmacy, BN University, Udaipur, Rajasthan-313001, India
| | - C S Sharma
- Department of Pharmaceutical Chemistry, BN College of Pharmacy, Faculty of Pharmacy, BN University, Udaipur, Rajasthan-313001, India
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Sangabathula O, Potphode D, Sharma CS. Morphology‐Controlled Molybdenum Disulfide/Candle Soot Carbon Composite for High‐Performance Supercapacitor. ChemistrySelect 2020. [DOI: 10.1002/slct.202001443] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Omkar Sangabathula
- Creative & Advanced Research Based on Nanomaterials (CARBON) LaboratoryDepartment of Chemical EngineeringIndian Institute of Technology Hyderabad Kandi 502285 Telangana India
| | - Darshna Potphode
- Creative & Advanced Research Based on Nanomaterials (CARBON) LaboratoryDepartment of Chemical EngineeringIndian Institute of Technology Hyderabad Kandi 502285 Telangana India
| | - Chandra S. Sharma
- Creative & Advanced Research Based on Nanomaterials (CARBON) LaboratoryDepartment of Chemical EngineeringIndian Institute of Technology Hyderabad Kandi 502285 Telangana India
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Aadil KR, Nathani A, Sharma CS, Lenka N, Gupta P. Investigation of poly(vinyl) alcohol-gellan gum based nanofiber as scaffolds for tissue engineering applications. J Drug Deliv Sci Technol 2019. [DOI: 10.1016/j.jddst.2019.101276] [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: 02/02/2023]
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12
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Nathani A, Sharma CS. Electrospun Mesoporous Poly(Styrene‐Block‐Methyl‐ Methacrylate) Nanofibers as Biosensing Platform: Effect of Fibers Porosity on Sensitivity. ELECTROANAL 2019. [DOI: 10.1002/elan.201800796] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Akash Nathani
- Creative & Advanced Research Based On Nanomaterials (CARBON) LaboratoryDepartment of Chemical EngineeringIndian Institute of Technology, Hyderabad Kandi, Telangana 502285 India
| | - Chandra S. Sharma
- Creative & Advanced Research Based On Nanomaterials (CARBON) LaboratoryDepartment of Chemical EngineeringIndian Institute of Technology, Hyderabad Kandi, Telangana 502285 India
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13
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Illa MP, Khandelwal M, Sharma CS. Modulated Dehydration for Enhanced Anodic Performance of Bacterial Cellulose derived Carbon Nanofibers. ChemistrySelect 2019. [DOI: 10.1002/slct.201901359] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Mani Pujitha Illa
- Department of Materials Science and Metallurgical EngineeringIndian Institute of Technology, Hyderabad, Kandi- 502285 Telangana India
- Creative & Advanced Research Based On Nanomaterial (CARBON) LaboratoryDepartment of Chemical EngineeringIndian Institute of Technology, Hyderabad, Kandi- 502285 Telangana India
| | - Mudrika Khandelwal
- Department of Materials Science and Metallurgical EngineeringIndian Institute of Technology, Hyderabad, Kandi- 502285 Telangana India
| | - Chandra S. Sharma
- Creative & Advanced Research Based On Nanomaterial (CARBON) LaboratoryDepartment of Chemical EngineeringIndian Institute of Technology, Hyderabad, Kandi- 502285 Telangana India
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15
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Dhiman N, Kingshott P, Sumer H, Sharma CS, Rath SN. On-chip anticancer drug screening - Recent progress in microfluidic platforms to address challenges in chemotherapy. Biosens Bioelectron 2019; 137:236-254. [PMID: 31121461 DOI: 10.1016/j.bios.2019.02.070] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [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: 12/06/2018] [Revised: 02/27/2019] [Accepted: 02/27/2019] [Indexed: 12/18/2022]
Abstract
There is an increasing need for advanced and inexpensive preclinical models to accelerate the development of anticancer drugs. While costly animal models fail to predict human clinical outcomes, in vitro models such as microfluidic chips ('tumor-on-chip') are showing tremendous promise at predicting and providing meaningful preclinical drug screening outcomes. Research on 'tumor-on-chips' has grown enormously worldwide and is being widely accepted by pharmaceutical companies as a drug development tool. In light of this shift in philosophy, it is important to review the recent literature on microfluidic devices to determine how rapidly the technology has progressed as a promising model for drug screening and aiding cancer therapy. We review the past five years of successful developments and capabilities in microdevice technology (cancer models) for use in anticancer drug screening. Microfluidic devices that are being designed to address current challenges in chemotherapy, such as drug resistance, combinatorial drug therapy, personalized medicine, and cancer metastasis are also reviewed in detail. We provide a perspective on how personalized 'tumor-on-chip', as well as high-throughput microfluidic platforms based on patient-specific tumor cells, can potentially replace the more expensive and 'non-human' animal models in preclinical anticancer drug development.
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Affiliation(s)
- Nandini Dhiman
- Regenerative Medicine and Stem Cells Laboratory, Department of Biomedical Engineering, Indian Institute of Technology Hyderabad, Kandi, Telangana, India; Department of Chemistry and Biotechnology, Faculty of Science and Engineering Technology, Swinburne University of Technology, Hawthorn, Victoria, Australia
| | - Peter Kingshott
- Department of Chemistry and Biotechnology, Faculty of Science and Engineering Technology, Swinburne University of Technology, Hawthorn, Victoria, Australia
| | - Huseyin Sumer
- Department of Chemistry and Biotechnology, Faculty of Science and Engineering Technology, Swinburne University of Technology, Hawthorn, Victoria, Australia
| | - Chandra S Sharma
- Creative & Advanced Research Based On Nanomaterials Laboratory, Department of Chemical Engineering, Indian Institute of Technology Hyderabad, Kandi, Telangana, India
| | - Subha Narayan Rath
- Regenerative Medicine and Stem Cells Laboratory, Department of Biomedical Engineering, Indian Institute of Technology Hyderabad, Kandi, Telangana, India.
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Sankar S, Kakunuri M, D. Eswaramoorthy S, Sharma CS, Rath SN. Effect of patterned electrospun hierarchical structures on alignment and differentiation of mesenchymal stem cells: Biomimicking bone. J Tissue Eng Regen Med 2018; 12:e2073-e2084. [DOI: 10.1002/term.2640] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2017] [Revised: 11/30/2017] [Accepted: 01/02/2018] [Indexed: 01/06/2023]
Affiliation(s)
- Sharanya Sankar
- Department of Biomedical EngineeringIndian Institute of Technology Hyderabad Telangana India
| | - Manohar Kakunuri
- Department of Material Science and engineeringIndian Institute of Technology Hyderabad Telangana India
- Creative & Advanced Research Based On Nanomaterials (CARBON) Laboratory, Department of Chemical EngineeringIndian Institute of Technology Hyderabad Telangana India
| | | | - Chandra S. Sharma
- Creative & Advanced Research Based On Nanomaterials (CARBON) Laboratory, Department of Chemical EngineeringIndian Institute of Technology Hyderabad Telangana India
| | - Subha N. Rath
- Department of Biomedical EngineeringIndian Institute of Technology Hyderabad Telangana India
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17
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Sankar S, Sharma CS, Rath SN, Ramakrishna S. Electrospun Fibers for Recruitment and Differentiation of Stem Cells in Regenerative Medicine. Biotechnol J 2017; 12. [PMID: 28980771 DOI: 10.1002/biot.201700263] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2017] [Revised: 09/12/2017] [Indexed: 11/11/2022]
Abstract
Electrospinning is a popular technique used to mimic the natural sub-micron features of the native tissue. The ultra-fine fibers provide a favorable extracellular matrix-like environment for regulation of cellular functions. This article summarizes and reviews the current advances in electrospun fiber application and focuses on the novel strategies applied for tissue regeneration and repair. It explores the different factors affecting the attachment and proliferation of mesenchymal stem cells (MSCs) on the electrospun substrates. The influence of different features of electrospun fibers in the differentiation of MSCs into specific lineages (bone, cartilage, tendon/ligament, and nerves) has been elaborated. In addition, the different techniques to mimic the hierarchical features of tissues and its effect on cellular functions are reviewed. Additionally, the new developments like three-dimensional (3D) electrospinning, 3D spheroid double strategy and the comparative analysis of dynamic and static culture on electrospun scaffolds are discussed. With the intricate understanding of the interaction between the cells and the electrospun fiber matrix we can aim to combine the newer strategies to overcome the existing challenges and improve the potential application of electrospun fibers in the field of tissue regeneration and repair.
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Affiliation(s)
- Sharanya Sankar
- Department of Biomedical Engineering, Indian Institute of Technology, Telangana-502285, Hyderabad, India
| | - Chandra S Sharma
- Department of Chemical Engineering, Indian Institute of Technology, Telangana-502285, Hyderabad, India
| | - Subha N Rath
- Department of Biomedical Engineering, Indian Institute of Technology, Telangana-502285, Hyderabad, India
| | - Seeram Ramakrishna
- Center for Nanofibers & Nanotechnology, National University of Singapore, 110077, Singapore
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Laha A, Sharma CS, Majumdar S. Sustained drug release from multi-layered sequentially crosslinked electrospun gelatin nanofiber mesh. Materials Science and Engineering: C 2017; 76:782-786. [DOI: 10.1016/j.msec.2017.03.110] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Revised: 01/02/2017] [Accepted: 03/13/2017] [Indexed: 11/27/2022]
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Adepu S, Dhiman N, Laha A, Sharma CS, Ramakrishna S, Khandelwal M. Three-dimensional bioprinting for bone tissue regeneration. Current Opinion in Biomedical Engineering 2017. [DOI: 10.1016/j.cobme.2017.03.005] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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20
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Sankar S, Sharma CS, Rath SN, Ramakrishna S. Electrospun nanofibres to mimic natural hierarchical structure of tissues: application in musculoskeletal regeneration. J Tissue Eng Regen Med 2017; 12:e604-e619. [DOI: 10.1002/term.2335] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2016] [Revised: 07/26/2016] [Accepted: 09/26/2016] [Indexed: 01/26/2023]
Affiliation(s)
- Sharanya Sankar
- Department of Biomedical Engineering; Indian Institute of Technology; Telangana Hyderabad India
| | - Chandra S. Sharma
- Department of Chemical Engineering; Indian Institute of Technology; Telangana Hyderabad India
| | - Subha N. Rath
- Department of Biomedical Engineering; Indian Institute of Technology; Telangana Hyderabad India
| | - Seeram Ramakrishna
- Center for Nanofibres & Nanotechnology; National University of Singapore; Singapore
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Kakunuri M, Wanasekara ND, Sharma CS, Khandelwal M, Eichhorn SJ. Three-dimensional electrospun micropatterned cellulose acetate nanofiber surfaces with tunable wettability. J Appl Polym Sci 2017. [DOI: 10.1002/app.44709] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Manohar Kakunuri
- Department of Material Science and Metallurgical Engineering; Indian Institute of Technology Hyderabad; Kandi Telangana 502285 India
| | - Nandula D. Wanasekara
- College of Engineering, Mathematics and Physical Sciences; University of Exeter; Exeter Devon EX4 4QF United Kingdom
| | - Chandra S. Sharma
- Department of Chemical Engineering; Indian Institute of Technology Hyderabad; Kandi Telangana 502285 India
| | - Mudrika Khandelwal
- Department of Material Science and Metallurgical Engineering; Indian Institute of Technology Hyderabad; Kandi Telangana 502285 India
| | - Stephen J. Eichhorn
- College of Engineering, Mathematics and Physical Sciences; University of Exeter; Exeter Devon EX4 4QF United Kingdom
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Haridas AK, Sharma CS, Rao TN. Caterpillar-like sub-micron LiNi0.5Mn1.5O4 structures with site disorder and excess Mn3+ as high performance cathode material for lithium ion batteries. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2016.07.039] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Laha A, Majumdar S, Sharma CS. Controlled Drug Release Formulation by Sequential Crosslinking of Multilayered Electrospun Gelatin Nanofiber Mat. ACTA ACUST UNITED AC 2016. [DOI: 10.1557/adv.2016.320] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [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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24
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Laha A, Yadav S, Majumdar S, Sharma CS. In-vitro release study of hydrophobic drug using electrospun cross-linked gelatin nanofibers. Biochem Eng J 2016. [DOI: 10.1016/j.bej.2015.11.001] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Sharma CS, Dhakal J, Nannapaneni R. Efficacy of Lytic Bacteriophage Preparation in Reducing Salmonella In Vitro, on Turkey Breast Cutlets, and on Ground Turkey. J Food Prot 2015; 78:1357-62. [PMID: 26197288 DOI: 10.4315/0362-028x.jfp-14-585] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The efficacy of the recently approved Salmonella lytic bacteriophage preparation (SalmoFresh) in reducing Salmonella enterica serotype Heidelberg on turkey breast cutlets and ground turkey was evaluated. In a broth model assay, the phage preparation completely inhibited the growth of four S. enterica serotypes (Salmonella Enteritidis, Salmonella Heidelberg, Salmonella Kentucky, and Salmonella Typhimurium) at 37°C at a multiplicity of infection of 10,000 PFU/CFU. At 4°C in 0.1% peptone water (PW), phage treatment at a multiplicity of infection of 10,000 resulted in ca. 4.0-log CFU/ml reductions of Salmonella Enteritidis, Salmonella Heidelberg, and Salmonella Typhimurium. When raw turkey breast cutlets inoculated with Salmonella Heidelberg (∼10(3) CFU/g) were treated with phage preparation (10(7) PFU/g) and stored at 4°C, the phage treatment caused reductions of 0.8, 0.6, and 1.3 log CFU/g (P ≤ 0.05) of Salmonella Heidelberg on day 0, 1, and 7, respectively, compared with the counts in the control. However, no significant reduction of Salmonella Heidelberg (P > 0.05) was observed in ground turkey when turkey meat pieces inoculated with Salmonella Heidelberg were surface treated with phage preparation (10(7) PFU/g) before grinding. These findings indicate that the bacteriophage preparation was effective in reducing Salmonella on turkey breast cutlets as a surface treatment but did not cause any reduction of Salmonella Heidelberg in ground turkey.
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Affiliation(s)
- C S Sharma
- Poultry Science Department, Nutrition and Health Promotion, Mississippi State University, Mississippi State, Mississippi 39762, USA.
| | - J Dhakal
- Poultry Science Department, Nutrition and Health Promotion, Mississippi State University, Mississippi State, Mississippi 39762, USA
| | - R Nannapaneni
- Department of Food Science, Nutrition and Health Promotion, Mississippi State University, Mississippi State, Mississippi 39762, USA
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Haridas AK, Sharma CS, Rao TN. Donut-shaped Li4Ti5O12 structures as a high performance anode material for lithium ion batteries. Small 2015; 11:290-294. [PMID: 25167962 DOI: 10.1002/smll.201303894] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2013] [Revised: 07/01/2014] [Indexed: 06/03/2023]
Abstract
Lithium titanate (LTO) spinel 3D porous sub-micrometer donuts synthesized by combined sol-gel and electrospraying reveal a wall thickness of 200-250 nm with grain sizes in the range of 60-100 nm. Electrochemical testing of sub-micrometer donuts in half-cell mode exhibited a reversible specific capacity of 141 mAh/g even after 200 cycles of charging and discharging at 1C rate. The LTO structures with nanograins effectively reduce the Li ion diffusion path length, providing easy charge and discharge with good cyclability.
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Affiliation(s)
- Anulekha K Haridas
- Centre for Nano Materials, International Advanced Research Centre for Powder Metallurgy and New Materials (ARCI), Hyderabad, A. P., India; Department of Chemical Engineering, Indian Institute of Technology, Hyderabad, Yeddumailaram, A.P., India
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Kakunuri M, Vennamalla S, Sharma CS. Synthesis of carbon xerogel nanoparticles by inverse emulsion polymerization of resorcinol–formaldehyde and their use as anode materials for lithium-ion battery. RSC Adv 2015. [DOI: 10.1039/c4ra15171b] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Resorcinol–formaldehyde (RF) derived carbon xerogel nanoparticles synthesized by inverse emulsification followed by drying and pyrolysis exhibited excellent electrochemical characteristics and thus find potential use as high capacity anode materials for Li ion battery.
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Affiliation(s)
- Manohar Kakunuri
- Department of Chemical Engineering
- Indian Institute of Technology
- Hyderabad
- India
| | - Sheetal Vennamalla
- Department of Chemical Engineering
- Indian Institute of Technology
- Hyderabad
- India
| | - Chandra S. Sharma
- Department of Chemical Engineering
- Indian Institute of Technology
- Hyderabad
- India
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Haridas AK, Sharma CS, Rao TN. Electrochemical Performance of Lithium Titanate Submicron Rods Synthesized by Sol-Gel/Electrospinning. ELECTROANAL 2014. [DOI: 10.1002/elan.201400233] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Mattaparthi S, Sharma CS. Biomimicked high-aspect-ratio hierarchical superhydrophobic polymer surfaces. Bioinspired, Biomimetic and Nanobiomaterials 2014. [DOI: 10.1680/bbn.13.00015] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
There is an abundance of plant surfaces in nature, which inspires scientific community to replicate and prepare artificial superhydrophobic surfaces. However, most of these studies are limited to low-aspect-ratio structures as found in petals and leaves. In this study, the authors chose Canna indica, a garden plant belonging to Cannaceae family, as a model plant. The C. indica seedpods possess high-aspect-ratio multiscale structures and also show superhydrophobic behavior. These high-aspect-ratio hierarchical structures as found in C. Indica seedpod were then successfully replicated by replica molding in different polymers such as poly(dimethylsiloxane) (PDMS) and resorcinol–formaldehyde (RF)-based xerogel. These biomimicked polymer surfaces exhibit superhydrophobicity as confirmed by water contact angle measurement. The original seedpod shows water contact angle of 151°, while negative PDMS and RF gel replica with high-aspect-ratio structural patterns show water contact angle of 146 and 155°, respectively. Thus, the biomimetic approach depicted here not only allows the facile fabrication of high-aspect-ratio structures over a large area but also provides a low-cost alternative to produce superhydrophobic polymer surfaces.
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Affiliation(s)
- Srinadh Mattaparthi
- Department of Chemical Engineering, Indian Institute of Technology Hyderabad, Yeddumailaram, Andra Pradesh, India
| | - Chandra S. Sharma
- Department of Chemical Engineering, Indian Institute of Technology Hyderabad, Yeddumailaram, Andra Pradesh, India
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Haridas AK, Sharma CS, Sritharan V, Rao TN. Fabrication and surface functionalization of electrospun polystyrene submicron fibers with controllable surface roughness. RSC Adv 2014. [DOI: 10.1039/c3ra44170a] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Kaur S, Senthilkumar K, Verma VK, Kumar B, Kumar S, Katnoria JK, Sharma CS. Preliminary analysis of polycyclic aromatic hydrocarbons in air particles (PM10) in Amritsar, India: sources, apportionment, and possible risk implications to humans. Arch Environ Contam Toxicol 2013; 65:382-95. [PMID: 23695716 DOI: 10.1007/s00244-013-9912-6] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2013] [Accepted: 04/30/2013] [Indexed: 05/26/2023]
Abstract
Preliminary analysis was performed to assess human health risks of exposure to 16 polycyclic aromatic hydrocarbons (PAHs) by way of inhalation by children and adults living in urban area of Amritsar, Punjab, India. In particular, the United States Environmental Protection Agency's (USEPA's) 16 priority PAH compounds were analyzed in air particulate matter (PM10) from different geographical locations by high-volume air sampler. Sum concentrations of PAHs (37-274 ng m(-3)) were comparable with those of other cities in India as well many cities on a global scale. Pyrene, naphthalene, acenaphthene, acenaphthylene, fluoranthene, fluorene, and dibenzo(a,h)anthracene accounted for >80% of ∑16PAH concentrations. Furthermore, the contribution of seven carcinogenic PAHs accounted for 12% of ∑16PAHs. The estimated carcinogenicity of PAHs in terms of benzo(a)pyrene toxic equivalency (BaPTEQ) was assessed and confirmed that dibenzo(a,h)anthracene was the dominant PAH contributor (88.7%) followed by benzo(a)pyrene (6.67%). Homolog pattern and diagnostic ratios of PAHs suggested that mixed pyrogenic sources--including biomass burning, coal combustion, and petrogenic sources, such as vehicular emissions--are dominant PAH sources in Amritsar. Health risk of adults and children by way of PAHs was assessed by estimating the lifetime average daily dose (LADD) and corresponding incremental lifetime cancer risk (ILCR) using USEPA guidelines. The assessed cancer risk (ILCR) was found to be within the acceptable range (10(-6)-10(-4)).
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Affiliation(s)
- Simerpreet Kaur
- Department of Botanical and Environmental Sciences, Guru Nanak Dev University, Amritsar 143005, Punjab, India
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Abstract
Epidural volume extension is a technical modification of the combined spinal epidural block. It involves the epidural injection of normal saline or a small volume of local anaesthetic after an intrathecal injection, aiming to augment the post-spinal sensory level. Although the consequent sensory block augmentation has been adequately documented, the probable factors influencing epidural volume extension and its implications for clinical practice are not well defined. This article reviews published literature relating to the probable factors affecting epidural volume extension, its clinical implications, case reports of its successful clinical application and summarises its unexplored effects.
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Affiliation(s)
- A Tyagi
- Department of Anaesthesiology and Critical Care, University College of Medical Sciences and Guru Teg Bahadur Hospital, Shahadra, Delhi, India.
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Nayani K, Katepalli H, Sharma CS, Sharma A, Patil S, Venkataraghavan R. Electrospinning Combined with Nonsolvent-Induced Phase Separation To Fabricate Highly Porous and Hollow Submicrometer Polymer Fibers. Ind Eng Chem Res 2011. [DOI: 10.1021/ie2009229] [Citation(s) in RCA: 106] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Karthik Nayani
- Department of Chemical Engineering and DST Unit on Nanosciences, Indian Institute of Technology, Kanpur-208016, U.P., India
| | - Hari Katepalli
- Department of Chemical Engineering and DST Unit on Nanosciences, Indian Institute of Technology, Kanpur-208016, U.P., India
| | - Chandra S. Sharma
- Department of Chemical Engineering and DST Unit on Nanosciences, Indian Institute of Technology, Kanpur-208016, U.P., India
- Department of Chemical Engineering, Indian Institute of Technology, Hyderabad, Yeddumailaram-502205, A.P., India
| | - Ashutosh Sharma
- Department of Chemical Engineering and DST Unit on Nanosciences, Indian Institute of Technology, Kanpur-208016, U.P., India
| | - Sandip Patil
- Department of Chemical Engineering and DST Unit on Nanosciences, Indian Institute of Technology, Kanpur-208016, U.P., India
| | - R. Venkataraghavan
- Unilever R&D, Bangalore, 64, Main Road, Whitefield, Bangalore-560066, India
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Affiliation(s)
- Chandra S. Sharma
- Department of Chemical Engineering and DST Unit on Nanosciences, Indian Institute of Technology, Kanpur-208016, U.P., India
- Department of Chemical Engineering, Indian Institute of Technology, Hyderabad, Yeddumailaram-502205, A.P., India
| | - Kumar Abhishek
- Department of Chemical Engineering and DST Unit on Nanosciences, Indian Institute of Technology, Kanpur-208016, U.P., India
| | - Hari Katepalli
- Department of Chemical Engineering and DST Unit on Nanosciences, Indian Institute of Technology, Kanpur-208016, U.P., India
| | - Ashutosh Sharma
- Department of Chemical Engineering and DST Unit on Nanosciences, Indian Institute of Technology, Kanpur-208016, U.P., India
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Narang N, Banerjee A, Kotwal J, Kaur J, Sharma YV, Sharma CS. Psychiatric Manifestations in three cases of Acute Intermittent Porphyria. Med J Armed Forces India 2011; 59:171-3. [PMID: 27407502 DOI: 10.1016/s0377-1237(03)80075-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Affiliation(s)
- Neatu Narang
- Classified Specialist (Psychiatry), Military Hospital, Kirkee, Pune
| | - A Banerjee
- Classified Specialist (Medicine & Neurology), INHS Asvini, Colaba, Mumbai
| | - J Kotwal
- Classified Specialist (Pathology), Armed Forces Transfusion Centre, Delhi
| | - Jasmeet Kaur
- Graded Specialist, (Pathology), Command Hospital, Eastern Command, Calcutta
| | - Y V Sharma
- Comandant, Military Hospital, Ambala Cantt
| | - C S Sharma
- Addl Advisor, (Psychiatry), Command Hospital, Northern Command, C/o 56 APO
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Sharma CS, Sharma MK, Nagar PN. Organic Derivatives of Alkylene Dithiophosphates Part III: Synthesis and Properties of 2-( p -nitrophenyl) and 2-( p -nitrobenzoyl) Derivatives of Alkylene Dithiophosphates. PHOSPHORUS SULFUR 2010. [DOI: 10.1080/10426500210659] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [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]
Affiliation(s)
| | - Mukesh K. Sharma
- a Department of Chemistry , University of Rajasthan , Jaipur, India
| | - Padam N. Nagar
- a Department of Chemistry , University of Rajasthan , Jaipur, India
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Sharma CS, Verma A, Kulkarni MM, Upadhyay DK, Sharma A. Microfabrication of carbon structures by pattern miniaturization in resorcinol-formaldehyde gel. ACS Appl Mater Interfaces 2010; 2:2193-2197. [PMID: 20681561 DOI: 10.1021/am100512c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
A simple and novel method to fabricate and miniaturize surface and subsurface microstructures and micropatterns in glassy carbon is proposed and demonstrated. An aqueous resorcinol-formaldehyde (RF) sol is employed for micromolding of the master pattern to be replicated, followed by controlled drying and pyrolysis of the gel to reproduce an isotropically shrunk replica in carbon. The miniaturized version of the master pattern thus replicated in carbon is about 1 order of magnitude smaller than original master by repeating three times the above cycle of molding and drying. The microfabrication method proposed will greatly enhance the toolbox for a facile fabrication of a variety of carbon-MEMS and C-microfluidic devices.
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Pathak R, Suke SG, Ahmed T, Ahmed RS, Tripathi AK, Guleria K, Sharma CS, Makhijani SD, Banerjee BD. Organochlorine pesticide residue levels and oxidative stress in preterm delivery cases. Hum Exp Toxicol 2010; 29:351-8. [DOI: 10.1177/0748233710363334] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
A number of studies have focused attention on various biochemical abnormalities evoked due to exposure to organochlorine pesticides (OCPs). The aim of the present study was to analyze the OCP residues in maternal and cord blood of women and assess the levels of different non-enzymatic oxidative stress markers as well as to establish correlation with OCP levels, if any. Thirty women in each group of full-term delivery (FTD; ≥37 weeks of gestation) and preterm delivery (PTD; <37 weeks of gestation) were enrolled in this study. Levels of OCPs like Hexachlorocyclohexane (HCH), endosulfan, p,p′ Dichlorodiphenyldichloroethylene (DDE) and p,p’ Dichlorodiphenyltrichloroethane (DDT) were analyzed by gas chromatography. Non-enzymatic oxidative stress was measured by the quantification of malondialhyde (MDA), protein carbonyl, reduced glutathione (GSH) and ferric-reducing ability of plasma (FRAP). MDA and protein carbonyl levels were increased significantly, while the levels of GSH and FRAP were decreased in PTD in comparison to FTD cases. We have observed higher levels of β-HCH and α-endosulfan and increased oxidative stress in PTD than FTD cases. In PTD cases, a significant positive correlation was observed between maternal blood levels of β-HCH and MDA (r = .78), β-HCH and GSH (r = —.65), γ-HCH and MDA (r = .89), γ-HCH and GSH (r = —.74) and α-endosulfan and MDA (r = .54) in PTD cases. We also found significant correlations between cord blood levels of β-HCH and MDA (r = .59), β-HCH and GSH (r = —.69), γ-HCH and MDA (r = .62) and α-endosulfan and MDA (r = .54) in PTD cases. In conclusion, our results suggest that higher levels of some of the OCP residues may be associated with PTD and increased oxidative stress.
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Affiliation(s)
- Rahul Pathak
- Environmental Biochemistry and Immunology Laboratory, Department of Biochemistry, University College of Medical Sciences & G.T.B. Hospital (University of Delhi), Delhi, India
| | - Sanvidhan G Suke
- Environmental Biochemistry and Immunology Laboratory, Department of Biochemistry, University College of Medical Sciences & G.T.B. Hospital (University of Delhi), Delhi, India
| | - Tanzeel Ahmed
- Environmental Biochemistry and Immunology Laboratory, Department of Biochemistry, University College of Medical Sciences & G.T.B. Hospital (University of Delhi), Delhi, India
| | - Rafat S Ahmed
- Environmental Biochemistry and Immunology Laboratory, Department of Biochemistry, University College of Medical Sciences & G.T.B. Hospital (University of Delhi), Delhi, India
| | - AK Tripathi
- Environmental Biochemistry and Immunology Laboratory, Department of Biochemistry, University College of Medical Sciences & G.T.B. Hospital (University of Delhi), Delhi, India
| | - Kiran Guleria
- Department of Obstetrics and Gynecology, University College of Medical Sciences & G.T.B. Hospital (University of Delhi), Delhi, India
| | - CS Sharma
- Instrumentation and Bio-Labs, Central Pollution Control Board, Ministry of Environment and Forest, Delhi, India
| | - SD Makhijani
- Instrumentation and Bio-Labs, Central Pollution Control Board, Ministry of Environment and Forest, Delhi, India
| | - BD Banerjee
- Environmental Biochemistry and Immunology Laboratory, Department of Biochemistry, University College of Medical Sciences & G.T.B. Hospital (University of Delhi), Delhi, India,
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Jain S, Jain M, Sharma CS. Effect of yoga and relaxation techniques on cardiovascular system. Indian J Physiol Pharmacol 2010; 54:183-185. [PMID: 21090538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
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Pathak R, Suke SG, Ahmed T, Ahmed RS, Tripathi AK, Guleria K, Sharma CS, Makhijani SD, Banerjee BD. Organochlorine pesticide residue levels and oxidative stress in preterm delivery cases. Hum Exp Toxicol 2010. [DOI: 10.1177/0960327110363334] [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: 11/16/2022]
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Sharma CS, Sharma A, Madou M. Multiscale carbon structures fabricated by direct micropatterning of electrospun mats of SU-8 photoresist nanofibers. Langmuir 2010; 26:2218-22. [PMID: 20070083 DOI: 10.1021/la904078r] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
A novel method for the direct fabrication of arrays of micropatterned polymeric and carbon nanofiber structures on any substrate is developed. First SU-8, an epoxy-based negative photoresist, is electrospun under optimized conditions to produce a layer of polymeric nanofibers. Next, this nanofibrous mat is micropatterned using photolithography, and finally, pyrolysis produces ordered arrays of microdomains containing carbon nanofibers. The nanotextured surfaces of carbon nanofibers are shown to be very hydrophobic (water contact angle approximately 130 degrees). Micropatterning thus generates a substantial wettability contrast of nanofiber domains with intervening micropatches of very hydrophilic carbon (approximately 20 degrees) or silicon substrates.
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Affiliation(s)
- Chandra S Sharma
- Department of Chemical Engineering and DST Unit on Nanosciences, Indian Institute of Technology, Kanpur-208016, UP, India
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Sharma CS, Vasita R, Upadhyay DK, Sharma A, Katti DS, Venkataraghavan R. Photoresist Derived Electrospun Carbon Nanofibers with Tunable Morphology and Surface Properties. Ind Eng Chem Res 2010. [DOI: 10.1021/ie901312j] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Chandra S. Sharma
- Departments of Chemical Engineering and Biological Sciences and Bioengineering, Indian Institute of Technology, Kanpur-208016, India, Unilever Research & Development Bangalore, 64, Main Road, Whitefield, Bangalore 560066, India
| | - Rajesh Vasita
- Departments of Chemical Engineering and Biological Sciences and Bioengineering, Indian Institute of Technology, Kanpur-208016, India, Unilever Research & Development Bangalore, 64, Main Road, Whitefield, Bangalore 560066, India
| | - Devendra K. Upadhyay
- Departments of Chemical Engineering and Biological Sciences and Bioengineering, Indian Institute of Technology, Kanpur-208016, India, Unilever Research & Development Bangalore, 64, Main Road, Whitefield, Bangalore 560066, India
| | - Ashutosh Sharma
- Departments of Chemical Engineering and Biological Sciences and Bioengineering, Indian Institute of Technology, Kanpur-208016, India, Unilever Research & Development Bangalore, 64, Main Road, Whitefield, Bangalore 560066, India
| | - Dhirendra S. Katti
- Departments of Chemical Engineering and Biological Sciences and Bioengineering, Indian Institute of Technology, Kanpur-208016, India, Unilever Research & Development Bangalore, 64, Main Road, Whitefield, Bangalore 560066, India
| | - R. Venkataraghavan
- Departments of Chemical Engineering and Biological Sciences and Bioengineering, Indian Institute of Technology, Kanpur-208016, India, Unilever Research & Development Bangalore, 64, Main Road, Whitefield, Bangalore 560066, India
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Godara R, Sharma RL, Sharma CS. Aberrant infestation of goat mandibles with Oestrus ovis larvae. Trop Anim Health Prod 2009; 42:137-9. [PMID: 19536637 DOI: 10.1007/s11250-009-9397-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2009] [Accepted: 06/09/2009] [Indexed: 10/20/2022]
Abstract
Nasal oestrosis is primarily an infestation of sheep. However, a non descript goat, aged three years was presented in lateral recumbency with clinical history of sneezing fits, laboured breathing, eroded mandibular lesions and bilaterally housing nasal bots therein. The first ever occurrence of nasal bots in an aberrant location (mandibles) in a goat, its therapeutic management and public health significance have been documented and discussed.
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Affiliation(s)
- R Godara
- Department of Veterinary Parasitology, Apollo College of Veterinary Medicine, Agra Road, Jamdoli, Jaipur, 302003, India.
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Sharma CS, Upadhyay DK, Sharma A. Controlling the Morphology of Resorcinol−Formaldehyde-Based Carbon Xerogels by Sol Concentration, Shearing, and Surfactants. Ind Eng Chem Res 2009. [DOI: 10.1021/ie900359w] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Chandra S. Sharma
- Department of Chemical Engineering and DST Unit on Nanosciences, Indian Institute of Technology, Kanpur-208016, U.P., India
| | - Devendra K. Upadhyay
- Department of Chemical Engineering and DST Unit on Nanosciences, Indian Institute of Technology, Kanpur-208016, U.P., India
| | - Ashutosh Sharma
- Department of Chemical Engineering and DST Unit on Nanosciences, Indian Institute of Technology, Kanpur-208016, U.P., India
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Gaur K, Kori ML, Tyagi LK, Singh V, Nema RK, Tripathi P, Sharma CS. Licofelone- novel analgesic and anti-inflammatory agent for osteoarthritis: An overview. J Young Pharm 2009. [DOI: 10.4103/0975-1483.51884] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Sharma CS, Nema RK, Sharma VK. Synthesis and screening for analgesic and anti-inflammatory activities of some novel amino acid-containing bicyclo compounds. J Young Pharm 2009. [DOI: 10.4103/0975-1483.55751] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Pathak R, Suke SG, Ahmed RS, Tripathi AK, Guleria K, Sharma CS, Makhijani SD, Mishra M, Banerjee BD. Endosulfan and other organochlorine pesticide residues in maternal and cord blood in North Indian population. Bull Environ Contam Toxicol 2008; 81:216-219. [PMID: 18488129 DOI: 10.1007/s00128-008-9459-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2007] [Accepted: 04/24/2008] [Indexed: 05/26/2023]
Abstract
Humans are exposed to various environmental chemicals such as organochlorine pesticide residues, heavy metals, polychlorinatedbiphenyls (PCBs) etc. There is paucity of data regarding the present blood levels of organochlorine residues in North Indian population with reference to reproductive health. The present study was designed to analyze the levels of organochlorine pesticide residues in maternal and cord blood samples of normal healthy women with full term pregnancy to gain insight into the current status of pesticide burden in newborns. Hexachlorocyclohexane (HCH) contributed maximum towards the total organochlorine residues present in maternal and cord blood followed by endosulfan, pp' DDE and pp' DDT being the least. This is also the first report indicating endosulfan levels in this population. Our data indicates a transfer rate of 60-70% of these pesticides from mothers to newborns and this high rate of transfer of pesticides is of great concern as it may adversely affect the growth and development of newborn.
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Affiliation(s)
- Rahul Pathak
- Department of Biochemistry, University College of Medical Sciences, Dilshad Garden, Delhi, 110 095, India
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Affiliation(s)
- Chandra S. Sharma
- a Department of Chemistry , University of Rajasthan , Jaipur , India
| | - Brajesh K. Jha
- a Department of Chemistry , University of Rajasthan , Jaipur , India
| | - Padam N. Nagar
- a Department of Chemistry , University of Rajasthan , Jaipur , India
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Abstract
Hemangioma of the median nerve presenting as acute carpal tunnel syndrome is unusual A-18- year old male presented with severe incapacitating pain of sudden onset of left forearm and hand after manual field work. There was swelling on volar aspect of forearm, with hyperalgesia in the median nerve distribution. The fingers and wrist were inmarked flexion and the patient did not allow wrist and finger extension. X-rays were within normal limits. An emergency volar carpal ligament release revealed, haematoma about 100 ml with numerous vessels encircling the median nerve. Histopathology of lesion turned out to be a cavernous hemangioma. Post operatively patient had full recovery.
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Affiliation(s)
- DS Meena
- Dept. of Orthopedics, SMS Hospital, Jaipur, India,Correspondence: Dr. D.S. Meena, E-34, Chetak Marg, Near J K Lon Hospital, Jaipur, India. E-mail:
| | | | - CS Sharma
- Dept. of Orthopedics, SMS Hospital, Jaipur, India
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