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Mahaling B, Verma M, Mishra G, Chaudhuri S, Dutta D, Sivakumar S. Fate of GdF 3 nanoparticles-loaded PEGylated carbon capsules inside mice model: a step toward clinical application. Nanotoxicology 2020; 14:577-594. [PMID: 31928284 DOI: 10.1080/17435390.2019.1708494] [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] [Indexed: 12/25/2022]
Abstract
The successful translation of nanostructure-based bioimaging and/or drug delivery system needs extensive in vitro and in vivo studies on biocompatibility, biodistribution, clearance, and toxicity for its diagnostic applications. Herein, we have investigated the in vitro cyto-hemocompatibility, in vivo biodistribution, clearance, and toxicity in mice after systemic administration of GdF3 nanoparticles loaded PEGylated mesoporous carbon capsule (GdF3-PMCC)-based theranostic system. In vitro cyto-hemocompatibility study showed a very good biocompatibility up to concentration of 500 µg/ml. Biodistribution studies carried out from 1 h to 8 days showed that GdF3-PMCC was found in major organs, such as liver, kidney, spleen, and muscle till 4th day and it was negligible in any tissue after 8th day. The clearance study was carried out for a period of 8 days and it was observed that the urinary system is the main route of excretion of GdF3-PMCC. The tissue toxicity study was done for 15 days and histopathological analysis indicated that the GdF3-PMCC based theranostic system does not have any adverse effect in tissues. Thus, PMCCs are nontoxic and can be applied as theranostic agents in contrast to the other carbon-based systems (PEGylated carbon nanotubes and PEGylated graphene oxide) which showed significant toxicity.
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Affiliation(s)
- Binapani Mahaling
- Department of Chemical Engineering, Centre for Environmental Science and Engineering, Thematic Unit of Excellence in Soft Nanofabrication, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, India
| | - Madhu Verma
- Department of Chemical Engineering, Centre for Environmental Science and Engineering, Thematic Unit of Excellence in Soft Nanofabrication, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, India.,Department of Biotechnology, National Institute of Technology Durgapur, Durgapur, West Bengal, India
| | - Gargi Mishra
- Department of Chemical Engineering, Centre for Environmental Science and Engineering, Thematic Unit of Excellence in Soft Nanofabrication, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, India
| | - Surabhi Chaudhuri
- Department of Biotechnology, National Institute of Technology Durgapur, Durgapur, West Bengal, India
| | - Debjani Dutta
- Department of Biotechnology, National Institute of Technology Durgapur, Durgapur, West Bengal, India
| | - Sri Sivakumar
- Department of Chemical Engineering, Centre for Environmental Science and Engineering, Thematic Unit of Excellence in Soft Nanofabrication, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, India.,Material Science Programme, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, India
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Abbas Z, Singh P, Dasari S, Sivakumar S, Patra AK. Luminescent EuIIIand TbIIIbimetallic complexes of N,N′-heterocyclic bases and tolfenamic acid: structures, photophysical aspects and biological activity. NEW J CHEM 2020. [DOI: 10.1039/d0nj03261a] [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: 12/15/2022]
Abstract
The isostructural bimetallic luminescent EuIIIand TbIIIdimers containing N,N′-heterocyclic bases and tolfenamic acid as a bridging ligands were evaluated for their structures, cellular imaging capability and photocytotoxicity.
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Affiliation(s)
- Zafar Abbas
- Department of Chemistry
- Indian Institute of Technology Kanpur
- Kanpur 208016
- India
| | - Prerana Singh
- Department of Chemical Engineering
- Indian Institute of Technology Kanpur
- Kanpur 208016
- India
- Department of Biological Sciences and Bioengineering
| | - Srikanth Dasari
- Department of Chemistry
- Indian Institute of Technology Kanpur
- Kanpur 208016
- India
| | - Sri Sivakumar
- Department of Chemical Engineering
- Indian Institute of Technology Kanpur
- Kanpur 208016
- India
| | - Ashis K. Patra
- Department of Chemistry
- Indian Institute of Technology Kanpur
- Kanpur 208016
- India
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Abstract
A pH-responsive, water soluble luminescent Eu(iii) probe is designed to target lysosomes via intrinsic f–f emission from the Eu(iii) centre.
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Affiliation(s)
- Kritika Gupta
- Department of Chemistry
- Indian Institute of Technology Kanpur
- Kanpur 208016
- India
| | - Madhu Verma
- Department of Chemical Engineering and Centre for Environmental Science and Engineering
- Indian Institute of Technology Kanpur
- Kanpur 208016
- India
| | - Priyanka Srivastava
- Department of Chemistry
- Indian Institute of Technology Kanpur
- Kanpur 208016
- India
| | - Sri Sivakumar
- Department of Chemical Engineering and Centre for Environmental Science and Engineering
- Indian Institute of Technology Kanpur
- Kanpur 208016
- India
| | - Ashis K. Patra
- Department of Chemistry
- Indian Institute of Technology Kanpur
- Kanpur 208016
- India
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Jakubek YA, Chang K, Sivakumar S, Yu Y, Giordano MR, Fowler J, Huff CD, Kadara H, Vilar E, Scheet P. Large-scale analysis of acquired chromosomal alterations in non-tumor samples from patients with cancer. Nat Biotechnol 2020; 38:90-96. [PMID: 31685958 PMCID: PMC8082517 DOI: 10.1038/s41587-019-0297-6] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Accepted: 09/25/2019] [Indexed: 01/21/2023]
Abstract
Mosaicism, the presence of subpopulations of cells bearing somatic mutations, is associated with disease and aging and has been detected in diverse tissues, including apparently normal cells adjacent to tumors. To analyze mosaicism on a large scale, we surveyed haplotype-specific somatic copy number alterations (sCNAs) in 1,708 normal-appearing adjacent-to-tumor (NAT) tissue samples from 27 cancer sites and in 7,149 blood samples from The Cancer Genome Atlas. We find substantial variation across tissues in the rate, burden and types of sCNAs, including those spanning entire chromosome arms. We document matching sCNAs in the NAT tissue and the adjacent tumor, suggesting a shared clonal origin, as well as instances in which both NAT tissue and tumor tissue harbor a gain of the same oncogene arising in parallel from distinct parental haplotypes. These results shed light on pan-tissue mutations characteristic of field cancerization, the presence of oncogenic processes adjacent to cancer cells.
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Affiliation(s)
- Y A Jakubek
- Department of Epidemiology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.
| | - K Chang
- Department of Epidemiology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - S Sivakumar
- Department of Epidemiology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Y Yu
- Department of Epidemiology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - M R Giordano
- Department of Epidemiology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - J Fowler
- Department of Epidemiology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - C D Huff
- Department of Epidemiology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - H Kadara
- Department of Translational Molecular Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - E Vilar
- Department of Clinical Cancer Prevention, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - P Scheet
- Department of Epidemiology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
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Sasmal S, Sharma SK, Chatterjee S, Pal AJ, Turaga SP, Bettiol AA, Pala RGS, Sivakumar S, Valiyaveettil S. Gas-Induced Confinement-Deconfinement Interplay in Organic-Inorganic Hybrid Perovskite Thin Film Results in Systematic Band Modulation. ACS Appl Mater Interfaces 2019; 11:43708-43718. [PMID: 31642311 DOI: 10.1021/acsami.9b15122] [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] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Gas-induced growth of organic-inorganic hybrid perovskites, especially methylammonium lead iodide (MAPbI3), has shown interesting properties and applications in the area of optoelectronics. In this report, we introduce a method of gas-induced band gap engineering of thin films of MAPbI3 due to systematic dimensional confinement-deconfinement along the crystallographic c axis of growing MAPbI3. Interestingly, such a restricted growth phenomenon was observed when the hexylammonium lead iodide (two-dimensional hybrid perovskite) film was exposed to methylamine gas instead of the conventional PbI2 film-methylamine gas precursor pair. Hexylamine, formed due to the cation exchange reaction, interacts selectively with the Pb centers of growing MAPbI3 crystals, and this induces an enormous restriction in the growth of MAPbI3 along the crystallographic c direction, leading to a unique sheet-type MAPbI3 film having a much higher band gap (2.18 eV) compared to conventional bulk MAPbI3. However, careful control of exposure timing gradually evaporates the hexylamine, leading to systematic dimensional deconfinement, enabling modulation of the band gap from 2.18 to 1.69 eV. An interplay of adsorption and desorption of hexylamine is also utilized for generating patterns of two different fluorescent hybrid perovskite materials in a single pixel. This new mechanistic investigation highlighting gas-induced interplay of dimensional confinement-deconfinement associated with band gap tuning provides smooth thin films, which can be used to develop optoelectronic devices.
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Affiliation(s)
- Sayantan Sasmal
- Department of Chemistry , National University of Singapore , 3 Science Drive 3 , Singapore 117543
| | | | - Soumyo Chatterjee
- Department of Solid State Physics , Indian Association for the Cultivation of Science , Kolkata 700032 , India
| | - Amlan J Pal
- Department of Solid State Physics , Indian Association for the Cultivation of Science , Kolkata 700032 , India
| | - Shuvan Prashant Turaga
- Department of Physics , National University of Singapore , 2 Science Drive 3 , Singapore 117542
| | - Andrew Anthony Bettiol
- Department of Physics , National University of Singapore , 2 Science Drive 3 , Singapore 117542
| | | | | | - Suresh Valiyaveettil
- Department of Chemistry , National University of Singapore , 3 Science Drive 3 , Singapore 117543
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Sivakumar S, Muthirulan P, Meenakshi Sundaram M. Adsorption kinetic and isotherm studies of Azure A on various activated carbons derived from agricultural wastes. ARAB J CHEM 2019. [DOI: 10.1016/j.arabjc.2014.10.028] [Citation(s) in RCA: 5] [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] [Indexed: 10/24/2022] Open
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Srivastava P, Mishra R, Verma M, Sivakumar S, Patra AK. Cytotoxic ruthenium(II) polypyridyl complexes with naproxen as NSAID: Synthesis, biological interactions and antioxidant activity. Polyhedron 2019. [DOI: 10.1016/j.poly.2019.04.009] [Citation(s) in RCA: 5] [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] [Indexed: 12/11/2022]
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Mishra G, Bhattacharyya S, Bhatia V, Ateeq B, Sharma A, Sivakumar S. Correction to "Direct Intranuclear Anticancer Drug Delivery via Polydimethylsiloxane Nanoparticles: In Vitro and In Vivo Xenograft Studies". ACS Appl Mater Interfaces 2019; 11:39395. [PMID: 31608621 DOI: 10.1021/acsami.9b17603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
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Sharma GP, Pala RGS, Sivakumar S. Ultrasmall NiMoO4 robust nanoclusters-active carbon composite for high performance extrinsic pseudocapacitor. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.06.039] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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61
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Oakey J, Smith C, Underwood D, Afsharnasab M, Alday-Sanz V, Dhar A, Sivakumar S, Sahul Hameed AS, Beattie K, Crook A. Global distribution of white spot syndrome virus genotypes determined using a novel genotyping assay. Arch Virol 2019; 164:2061-2082. [PMID: 31131427 PMCID: PMC6591196 DOI: 10.1007/s00705-019-04265-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2019] [Accepted: 03/29/2019] [Indexed: 11/25/2022]
Abstract
White spot disease, caused by infection with white spot syndrome virus (WSSV), is a serious panzootic affecting prawn aquaculture. The disease has spread rapidly around the prawn-culturing regions of the world through a number of previously identified mechanisms. The ability to distinguish and trace strains of WSSV is of great benefit to identify, and then limit, the translocation routes of the disease. Here, we describe a novel genotyping method using 34 short tandem repeat regions of the viral genome concurrently. This technique is highly sensitive to strain differences when compared to previous methods. The efficacy of the described method is demonstrated by testing WSSV isolates from around the globe, showing regional genotypic differences. The differences in the genotypes were used to create a global minimum spanning network, and in most cases the observed relationships were substantiated with verification of transboundary movement. This novel panel of STR markers will provide a valuable epidemiological tool for white spot disease. We have applied this to an outbreak of the disease in Queensland, Australia, that occurred in 2016. While the results indicate that the source of this outbreak currently remains cryptic, the analyses have provided valuable insights with which to further study the origins of the strains involved.
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Affiliation(s)
- J Oakey
- Biosecurity Sciences Laboratory, Biosecurity Queensland, Queensland Department of Agriculture and Fisheries, 39 Kessels Road, Coopers Plains, QLD, 4108, Australia.
| | - C Smith
- Biosecurity Sciences Laboratory, Biosecurity Queensland, Queensland Department of Agriculture and Fisheries, 39 Kessels Road, Coopers Plains, QLD, 4108, Australia
| | - D Underwood
- Biosecurity Sciences Laboratory, Biosecurity Queensland, Queensland Department of Agriculture and Fisheries, 39 Kessels Road, Coopers Plains, QLD, 4108, Australia
| | - M Afsharnasab
- Department of Aquatic Animal Health and Diseases, Iranian Fisheries Research Organization, Tehran, Iran
| | - V Alday-Sanz
- National Aquaculture Group, King Abdul Aziz Rd, Al Murjan, Jeddah, 23715, Kingdom of Saudi Arabia
| | - A Dhar
- School of Animal and Comparative Biomedical Sciences, The University of Arizona, 1041 E Lowell St, Tucson, AZ, 85721, USA
| | - S Sivakumar
- Aquatic Animal Health Laboratory, C. Abdul Hakeem College, Melvisharam, Vellore District, Tamil Nadu, India
| | - A S Sahul Hameed
- Aquatic Animal Health Laboratory, C. Abdul Hakeem College, Melvisharam, Vellore District, Tamil Nadu, India
| | - K Beattie
- Biosecurity Queensland, Queensland Department of Agriculture and Fisheries, 41 George Street, Brisbane, 4000, Australia
| | - A Crook
- Biosecurity Queensland, Queensland Department of Agriculture and Fisheries, 41 George Street, Brisbane, 4000, Australia
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Sivakumar S, Abu-Shah E, Ahern D, Mangal N, Reddy S, Rendek A, Silva M, Soonawalla Z, Middleton M, Dustin M. The T cell architecture of pancreatic ductal adenocarcinoma. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz155.233] [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: 11/12/2022] Open
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63
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Lee L, Starkey T, Sivakumar S, Fotheringham S, Mozolowski G, Shearwood V, Palles C, Camilleri P, Kerr R, Kerr D. ToxNav germline genetic testing and PROMinet digital mobile application toxicity monitoring: results of a prospective single centre clinical utility study (PRECISE STUDY). Ann Oncol 2019. [DOI: 10.1093/annonc/mdz155.038] [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: 11/14/2022] Open
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64
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Ashok Kumar GVS, Venkata Subramani CR, Kumar R, Sivakumar S, Murugan S, Varadharajan S, Sureshkumar KV, Ananthasivan K, Joseph M, Srinivasan G. Design, installation and preliminary flux measurements at the Fast Flux Experimental Facility (FFEF) of the Fast Breeder Test Reactor (FBTR). J Radioanal Nucl Chem 2019. [DOI: 10.1007/s10967-019-06463-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Thamizhvanan S, Sivakumar S, Santhosh Kumar S, Vinoth Kumar D, Suryakodi S, Balaji K, Rajkumar T, Vimal S, Abdul Majeed S, Taju G, Sahul Hameed AS. Multiple infections caused by white spot syndrome virus and Enterocytozoon hepatopenaei in pond-reared Penaeus vannamei in India and multiplex PCR for their simultaneous detection. J Fish Dis 2019; 42:447-454. [PMID: 30659620 DOI: 10.1111/jfd.12956] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [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: 10/18/2018] [Revised: 11/26/2018] [Accepted: 11/27/2018] [Indexed: 06/09/2023]
Abstract
White leg shrimp, Penaeus vannamei, were collected on a monthly basis from grow-out ponds located at Tamil Nadu and Andhra Pradesh states along the east coast of India for screening of viral and other pathogens. Totally 240 shrimp samples randomly collected from 92 farms were screened for white spot syndrome virus (WSSV), infectious hypodermal and haematopoietic necrosis virus (IHHNV), infectious myonecrosis virus (IMNV) and Enterocytozoon hepatopenaei (EHP). The number of shrimp collected from shrimp farms ranged from 6 to 20 based on the body weight of the shrimp. All the shrimp collected from one farm were pooled together for screening for pathogens by PCR assay. Among the samples screened, 28 samples were WSSV-positive, one positive for IHHNV and 30 samples positive for EHP. Among the positive samples, four samples were found to be positive for both WSSV and EHP, which indicated that the shrimp had multiple infections with WSSV and EHP. This is the first report on the occurrence of multiple infections caused by WSSV and EHP. Multiplex PCR (m-PCR) protocol was standardized to detect both pathogens simultaneously in single reaction instead of carrying out separate PCR for both pathogens. Using m-PCR assay, naturally infected shrimp samples collected from field showed two prominent bands of 615 and 510 bp for WSSV and EHP, respectively.
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Affiliation(s)
- S Thamizhvanan
- Aquatic Animal Health Laboratory, C. Abdul Hakeem College, Melvisharam, Vellore, Tamil Nadu, India
| | - S Sivakumar
- Aquatic Animal Health Laboratory, C. Abdul Hakeem College, Melvisharam, Vellore, Tamil Nadu, India
| | - S Santhosh Kumar
- Aquatic Animal Health Laboratory, C. Abdul Hakeem College, Melvisharam, Vellore, Tamil Nadu, India
| | - D Vinoth Kumar
- Aquatic Animal Health Laboratory, C. Abdul Hakeem College, Melvisharam, Vellore, Tamil Nadu, India
| | - S Suryakodi
- Aquatic Animal Health Laboratory, C. Abdul Hakeem College, Melvisharam, Vellore, Tamil Nadu, India
| | - K Balaji
- Aquatic Animal Health Laboratory, C. Abdul Hakeem College, Melvisharam, Vellore, Tamil Nadu, India
| | - T Rajkumar
- Aquatic Animal Health Laboratory, C. Abdul Hakeem College, Melvisharam, Vellore, Tamil Nadu, India
| | - S Vimal
- Aquatic Animal Health Laboratory, C. Abdul Hakeem College, Melvisharam, Vellore, Tamil Nadu, India
| | - S Abdul Majeed
- Aquatic Animal Health Laboratory, C. Abdul Hakeem College, Melvisharam, Vellore, Tamil Nadu, India
| | - G Taju
- Aquatic Animal Health Laboratory, C. Abdul Hakeem College, Melvisharam, Vellore, Tamil Nadu, India
| | - A S Sahul Hameed
- Aquatic Animal Health Laboratory, C. Abdul Hakeem College, Melvisharam, Vellore, Tamil Nadu, India
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Sivakumar S. A Study on Non-Performing Asset Management with Special Reference to Coimbatore City Co-Operative Bank Ltd, Tamilnadu. International Journal of Management Studies 2018. [DOI: 10.18843/ijms/v5i4(2)/08] [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: 11/07/2022] Open
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68
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Sivakumar S, Vimal S, Abdul Majeed S, Santhosh Kumar S, Taju G, Madan N, Rajkumar T, Thamizhvanan S, Shamsudheen KV, Scaria V, Sivasubbu S, Sahul Hameed AS. A new strain of white spot syndrome virus affecting Litopenaeus vannamei in Indian shrimp farms. J Fish Dis 2018; 41:1129-1146. [PMID: 29745450 DOI: 10.1111/jfd.12811] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [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: 01/17/2018] [Accepted: 03/01/2018] [Indexed: 06/08/2023]
Abstract
White spot syndrome virus (WSSV)-infected shrimp samples collected from grow-out ponds located at Nellore, Andhra Pradesh, India, showed WSSV negative and positive by PCR using primer sets specific to ORF119 and VP28 gene of WSSV, respectively. This indicated the deletion of genetic fragments in the genome of WSSV. The WSSV isolate along with lab strain of WSSV was subjected to next-generation sequencing. The sequence analysis revealed a deletion of 13,170 bp at five positions in the genome of WSSV-NS (new strain) relative to WSSV-TH and WSSV-LS (lab strain). The PCR analysis using the ORF's specific primer sets revealed the complete deletion of 10 ORFs in the genome of WSSV-NS strain. The primer set was designed based on sequence covering ORF161/162/163 to amplify a product of 2,748 bp for WSSV-LS and 402 bp for WSSV-NS. Our surveillance programme carried out since 2002 revealed the replacement of WSSV-LS by WSSV-NS in Indian shrimp culture system.
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Affiliation(s)
- S Sivakumar
- OIE Reference Laboratory for WTD, C. Abdul Hakeem College, Melvisharam, India
| | - S Vimal
- OIE Reference Laboratory for WTD, C. Abdul Hakeem College, Melvisharam, India
| | - S Abdul Majeed
- OIE Reference Laboratory for WTD, C. Abdul Hakeem College, Melvisharam, India
| | - S Santhosh Kumar
- OIE Reference Laboratory for WTD, C. Abdul Hakeem College, Melvisharam, India
| | - G Taju
- OIE Reference Laboratory for WTD, C. Abdul Hakeem College, Melvisharam, India
| | - N Madan
- OIE Reference Laboratory for WTD, C. Abdul Hakeem College, Melvisharam, India
| | - T Rajkumar
- OIE Reference Laboratory for WTD, C. Abdul Hakeem College, Melvisharam, India
| | - S Thamizhvanan
- OIE Reference Laboratory for WTD, C. Abdul Hakeem College, Melvisharam, India
| | - K V Shamsudheen
- CSIR-Institute of Genomics and Integrative Biology, Delhi, India
- Academy of Scientific and Innovative Research, Delhi, India
| | - V Scaria
- CSIR-Institute of Genomics and Integrative Biology, Delhi, India
- Academy of Scientific and Innovative Research, Delhi, India
| | - S Sivasubbu
- CSIR-Institute of Genomics and Integrative Biology, Delhi, India
- Academy of Scientific and Innovative Research, Delhi, India
| | - A S Sahul Hameed
- OIE Reference Laboratory for WTD, C. Abdul Hakeem College, Melvisharam, India
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69
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Shrivastava VP, Kumar J, Sivakumar S. Enhanced Green Upconversion Emission From α-NaYF4
:Yb, Er Nanoparticles Embedded Silica Inverse Opal Heterostructure. CHEMPHOTOCHEM 2018. [DOI: 10.1002/cptc.201800079] [Citation(s) in RCA: 2] [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: 11/06/2022]
Affiliation(s)
- Vishnu Prasad Shrivastava
- Dr. Vishnu Prasad Shrivastava, Prof. Jitendra Kumar and Prof. Sri Sivakumar; Materials Science Programme; Indian Institute of Technology Kanpur; Kanpur- 208016 India
| | - Jitendra Kumar
- Dr. Vishnu Prasad Shrivastava, Prof. Jitendra Kumar and Prof. Sri Sivakumar; Materials Science Programme; Indian Institute of Technology Kanpur; Kanpur- 208016 India
| | - Sri Sivakumar
- Dr. Vishnu Prasad Shrivastava, Prof. Jitendra Kumar and Prof. Sri Sivakumar; Materials Science Programme; Indian Institute of Technology Kanpur; Kanpur- 208016 India
- Prof. Sri Sivakumar; Department of Chemical Engineering; Centre for Environmental Science and Engineering; Thematic Unit of Excellence on Soft Nanofabrication; Indian Institute of Technology Kanpur; Kanpur- 208016 India
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Sivakumar S, Chandrasekaran A, Ravisankar R, Ravikumar S, Prince Prakash Jebakumar J, Vijayagopal P, Vijayalakshmi I, Jose M. Measurement of natural radioactivity and evaluation of radiation hazards in coastal sediments of east coast of Tamilnadu using statistical approach. Journal of Taibah University for Science 2018. [DOI: 10.1016/j.jtusci.2014.03.004] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Affiliation(s)
- S. Sivakumar
- Department of Physics, Mailam Engineering College, Mailam 604304, Tamilnadu, India
| | - A. Chandrasekaran
- Vel Tech Dr. Rangarajan Dr. Sakunthala Engineering College, Avadi, Chennai 600 062, India
| | - R. Ravisankar
- Post Graduate and Research Department of Physics, Government Arts College, Thiruvannamalai 606603, Tamilnadu, India
| | - S.M. Ravikumar
- Post Graduate and Research Department of Physics, Government Arts College, Thiruvannamalai 606603, Tamilnadu, India
| | - J. Prince Prakash Jebakumar
- Coastal and Environmental Engineering, National Institute of Ocean Technology, Pallikaranai, Chennai 600100, Tamilnadu, India
| | - P. Vijayagopal
- Radiation Safety Section, Radiological Safety Division, Indira Gandhi Centre for Atomic Research, Kalpakkam 603102, Tamilnadu, India
| | - I. Vijayalakshmi
- Radiation Safety Section, Radiological Safety Division, Indira Gandhi Centre for Atomic Research, Kalpakkam 603102, Tamilnadu, India
| | - M.T. Jose
- Radiation Safety Section, Radiological Safety Division, Indira Gandhi Centre for Atomic Research, Kalpakkam 603102, Tamilnadu, India
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Rajkumar K, Sivakumar S, Arulraj R, Kaur M, Jasinski JP, Manimekalai A, Thiruvalluvar A. Crystal structures of two new 3-(2-chloro-eth-yl)- r(2), c(6)-diarylpiperidin-4-ones. Acta Crystallogr E Crystallogr Commun 2018; 74:483-486. [PMID: 29765751 PMCID: PMC5946973 DOI: 10.1107/s2056989018003766] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [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: 02/06/2018] [Accepted: 03/04/2018] [Indexed: 12/02/2022]
Abstract
The syntheses and crystal structures of 3-(2-chloro-eth-yl)-r-2,c-6-di-phenyl-piperidin-4-one, C19H20ClNO, (I), and 3-(2-chloro-eth-yl)-r-2,c-6-bis-(4-fluoro-phen-yl)piperidin-4-one, C19H18ClF2NO, (II), are described. The piperidone ring adopts a chair conformation in (I), whereas a slightly distorted chair conformation is formed in (II). The dihedral angle between the mean plane of the phenyl rings is 59.1 (1)° in (I) and 76.1 (1)° in (II). The crystal packing features weak inter-molecular N-H⋯O hydrogen bonds in each structure.
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Affiliation(s)
- K. Rajkumar
- Research and Development Centre, Bharathiar University, Coimbatore 641 046, Tamilnadu, India
| | - S. Sivakumar
- Research and Development Centre, Bharathiar University, Coimbatore 641 046, Tamilnadu, India
- Department of Chemistry, Thiruvalluvar Arts and Science College, Kurinjipadi 607 302, Tamilnadu, India
| | - R. Arulraj
- Research and Development Centre, Bharathiar University, Coimbatore 641 046, Tamilnadu, India
| | - Manpreet Kaur
- Department of Chemistry, Keene State College, 229 Main Street, Keene, NH, 03435-2001, USA
| | - Jerry P. Jasinski
- Department of Chemistry, Keene State College, 229 Main Street, Keene, NH, 03435-2001, USA
| | - A. Manimekalai
- Department of Chemistry, Annamalai University, Annamalai Nagar 608 002, Tamilnadu, India
| | - A. Thiruvalluvar
- Principal, Kunthavai Naacchiyaar Government Arts College for Women (Autonomous), Thanjavur 613 007, Tamilnadu, India
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72
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Mugundhan K, Chandrasekaran P, Sivakumar S, Sundaresan N, Senthilkumar P. Megalencephalic Leucoencephalopathy [Van Der Knaap Disease] in a Non Agarwal Family. J Assoc Physicians India 2018; 66:80. [PMID: 30341876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Affiliation(s)
| | | | | | - N Sundaresan
- Asst. Professor, Dept. of Radiology, Govt. Mohan Kumaramangalam Medical College Hospital, Salem, Tamil Nadu
| | - P Senthilkumar
- Asst. Professor, Dept. of Radiology, Govt. Mohan Kumaramangalam Medical College Hospital, Salem, Tamil Nadu
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73
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Sasmal S, Sinha A, Donnadieu B, Pala RGS, Sivakumar S, Valiyaveettil S. Volatility and Chain Length Interplay of Primary Amines: Mechanistic Investigation on the Stability and Reversibility of Ammonia-Responsive Hybrid Perovskites. ACS Appl Mater Interfaces 2018; 10:6711-6718. [PMID: 29372637 DOI: 10.1021/acsami.7b17971] [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] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Hybrid organic-inorganic perovskites possess promising signal transduction properties, which can be exploited in a variety of sensing applications. Interestingly, the highly polar nature of these materials, while being a bane in terms of stability, can be a boon for sensitivity when they are exposed to polar gases in a controlled atmosphere. However, signal transduction during sensing induces irreversible changes in the chemical and physical structure, which is one of the major lacuna preventing its utility in commercial applications. In the context of developing alkylammonium lead(II) iodide perovskite materials for sensing, here we address major issues such as reversibility of structure and properties, correlation between instability and properties of alkylamines, and relation between packing of alkyl chains inside the crystal lattice and the response time toward NH3 gas. The current investigation highlights that the vapor pressure of alkylamine formed in the presence of NH3 determines the reversibility and stability of the original perovskite lattice. In addition, close packing of alkyl chains inside the perovskite crystal lattice reduces the response toward NH3 gas. The mechanistic study addresses three important factors such as quick response, reversibility, and stability of perovskite materials in the presence of NH3 gas, which could lead to the design of stable and sensitive two-dimensional hybrid perovskite materials for developing sensors.
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Affiliation(s)
- Sayantan Sasmal
- Department of Chemistry, National University of Singapore , 3 Science Drive 3, 117543, Singapore
| | - Arup Sinha
- Department of Chemistry, National University of Singapore , 3 Science Drive 3, 117543, Singapore
| | - Bruno Donnadieu
- Department of Chemistry, National University of Singapore , 3 Science Drive 3, 117543, Singapore
| | | | | | - Suresh Valiyaveettil
- Department of Chemistry, National University of Singapore , 3 Science Drive 3, 117543, Singapore
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74
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Vincent M, Kumarasingam K, Mane S, Shunmugam R, Sivakumar S, Uma Devi KR. Enhancing antimycobacterial activity of isoniazid and rifampicin incorporated norbornene nanoparticles. Int J Mycobacteriol 2018. [DOI: 10.4103/ijmy.ijmy_162_17] [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] [Indexed: 11/04/2022] Open
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75
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76
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Sahana S, Mishra G, Sivakumar S, Bharadwaj PK. 2-(2′-Hydroxyphenyl)-benzothiazole (HBT)-terpyridine conjugate: A highly specific ICT based fluorescent probe for Zn2+ ions and its application in confocal cell imaging. J Photochem Photobiol A Chem 2018. [DOI: 10.1016/j.jphotochem.2017.10.009] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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77
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Gupta M, Pandey H, Sivakumar S. Intracellular Delivery of β-Galactosidase Enzyme Using Arginase-Responsive Dextran Sulfate/Poly-l-arginine Capsule for Lysosomal Storage Disorder. ACS Omega 2017; 2:9002-9012. [PMID: 30023598 PMCID: PMC6044979 DOI: 10.1021/acsomega.7b01230] [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] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Accepted: 11/23/2017] [Indexed: 06/08/2023]
Abstract
β-Galactosidase (β-gal) is one of the important lysosomal enzymes that is involved in the breakdown of glycosphingolipids (e.g., GM1 ganglioside), and its deficiency leads to GM1 Gangliosidosis, a lysosomal storage disorder (LSD). Intracellular delivery of β-gal is one of the preferable methods to treat this kind of LSDs. However, it cannot permeate the cell membrane due to its intricate macromolecular nature, low stability, and degradation by endogenous proteases. To this end, we report efficient intracellular delivery of β-gal via arginase-responsive dextran sulfate/poly-l-arginine polymer capsules (DS/PA capsules). The therapeutic activity of β-gal enzyme has been assessed in two gene-deficient diseased cell lines, SV (β-galactosidase gene-deficient mouse fibroblast) and R201C (deficient human β-galactosidase gene-introduced mouse fibroblast), and in wild-type mouse fibroblast immortalized cell lines. The activity of β-gal enzyme has been estimated within cells by using fluorescein isothiocyanate-cholera toxin B as a florescent probe that illustrates the level of GM1 ganglioside, the β-gal substrate. We found 1.8-, 3.4-, and 2.8-fold reduction in the substrate level in R201C, SV, and wild-type mouse fibroblast, respectively, which confirms the release and therapeutic activity of β-gal enzyme inside the cells. Moreover, enzyme delivery in gene-deficient diseased cell lines (SV and R201C) via DS/PA capsules reduced the level of enzyme substrate to a normal endogenous level, which is present in untreated wild-type mouse fibroblast cells. We note that loading of β-gal enzyme within DS/PA capsules was estimated to be 3 mU per hundred capsules and more than 77% of β-gal is released within 12 h. Overall, these results highlight the potential of DS/PA capsules as an efficient delivery carrier for therapeutic enzyme.
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Affiliation(s)
- Meenakshi Gupta
- Institute
of Pharmacy, Chhatrapati Shahu Ji Maharaj
University, Kanpur, Uttar Pradesh 208024, India
- Department
of Pharmaceutical Sciences, Sam Higginbottom
University of Agriculture, Technology and Sciences, Allahabad, Uttar Pradesh 211007, India
| | - Himanshu Pandey
- Department
of Pharmaceutical Sciences, Sam Higginbottom
University of Agriculture, Technology and Sciences, Allahabad, Uttar Pradesh 211007, India
| | - Sri Sivakumar
- Department
of Chemical Engineering, Material Science Programme, Centre for Nanoscience
and Soft Nanotechnology, Centre for Environmental Science and Engineering, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208016, India
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78
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Srivastava P, Singh K, Verma M, Sivakumar S, Patra AK. Photoactive platinum(II) complexes of nonsteroidal anti-inflammatory drug naproxen: Interaction with biological targets, antioxidant activity and cytotoxicity. Eur J Med Chem 2017; 144:243-254. [PMID: 29274491 DOI: 10.1016/j.ejmech.2017.12.025] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Revised: 12/05/2017] [Accepted: 12/07/2017] [Indexed: 02/02/2023]
Abstract
The effect on the therapeutic efficacy of Pt(II) complexes on combining non-steroidal anti-inflammatory drugs (NSAIDs) is an attractive strategy to circumvent chronic inflammation mediated by cancer and metastasis. Two square-planar platinum(II) complexes: [Pt(dach)(nap)Cl] (1) and [Pt(dach)(nap)2] (2), where dach = (1R,2R)-dichloro(cyclohexane-1,2-diamine) and NSAID drug naproxen (nap), have been designed for studying their biological activity. The naproxen bound to the Pt(II) centre get released upon photoirradiation with low-power UV-A light as confirmed by the significant enhancement in emission intensities of the complexes. The compounds were evaluated for their photophysical properties, photostability, reactivity with 5'-guanosine monophophosphate (5'-GMP), interactions with CT-DNA and BSA, antioxidant activity and reactive oxygen species mediated photo-induced DNA damage properties. ESI-MS studies demonstrated the formation of bis-adduct with 5'-GMP and the formation of PtII-DNA crosslinks by gel electrophoretic mobility shift assay and ITC studies. The interaction of the complexes 1 and 2 with the CT-DNA exhibits potential binding affinity (Kb ∼ 104 M-1, Kapp∼ 105 M-1), implying intercalation to CT-DNA through planar naphthyl ring of the complexes. Both the complexes also exhibit strong binding affinity towards BSA (KBSA∼ 105 M-1). The complexes exhibit efficient DNA damage activity on irradiation at 365 nm via formation of singlet oxygen (1O2) and hydroxyl radical (•OH) under physiological conditions. Both the complexes were cytotoxic in dark and exhibit significant enhancement of cytotoxicity upon photo-exposure against HeLa and HepG2 cancer cells giving IC50 values ranging from 8 to 12 μM for 1 and 2. The cellular internalization data showed cytosolic and nuclear localization of the complexes in the HeLa cells.
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Affiliation(s)
- Payal Srivastava
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, Uttar Pradesh, India
| | - Khushbu Singh
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, Uttar Pradesh, India
| | - Madhu Verma
- Department of Chemical Engineering and Centre for Environmental Science and Engineering, Indian Institute of Technology Kanpur, Kanpur 208016, Uttar Pradesh, India
| | - Sri Sivakumar
- Department of Chemical Engineering and Centre for Environmental Science and Engineering, Indian Institute of Technology Kanpur, Kanpur 208016, Uttar Pradesh, India
| | - Ashis K Patra
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, Uttar Pradesh, India.
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79
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Abstract
Purpose: To identify the morbidity patterns causing blindness in children attending schools for the blind in Chennai and comparing our data with similar studies done previously. Methods: A cross-sectional prevalence study was carried out in two schools for the blind in Chennai. Blind schools were visited by a team of ophthalmologists and optometrists. Students with best-corrected visual acuity (BCVA) worse than 3/60 in the better eye were included and relevant history was noted. Every student underwent anterior segment evaluation and detailed fundus examination. Morbidity of the better eye was taken as cause of blindness. Health records maintained by the school were referred to wherever available. Results: The anatomical causes of blindness include optic nerve disorders in 75 (24.8%) cases, retinal disorders in 55 (18.2%), corneal disorders in 47 (15.6%), lens-related disorders in 39 (12.9%), congenital anomalies in 11 (3.6%), and congenital glaucoma in 20 (6.6%) cases. The whole globe was involved in six cases (1.99%). Among conditions causing blindness, optic atrophy seen in 73 (24.17%) cases was the most common, followed by retinal dystrophy in 44 (14.56%), corneal scarring in 35 (11.59%), cataract in 22 (7.28%), and congenital glaucoma in 20 (6.6%) cases. Conclusion: It was found that avoidable causes of blindness were seen in 31% of cases and incurable causes in 45%. Optic nerve atrophy and retinal dystrophy are the emerging causes of blindness, underlining the need for genetic counseling and low vision rehabilitation centers, along with a targeted approach for avoidable causes of blindness.
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Affiliation(s)
- M Vs Prakash
- Department of Ophthalmology, Regional Institute of Ophthalmology and Government Ophthalmic Hospital, Chennai, Tamil Nadu, India
| | - S Sivakumar
- Department of Ophthalmology, Regional Institute of Ophthalmology and Government Ophthalmic Hospital, Chennai, Tamil Nadu, India
| | - Ashutosh Dayal
- Department of Ophthalmology, Regional Institute of Ophthalmology and Government Ophthalmic Hospital, Chennai, Tamil Nadu, India
| | - A Chitra
- Department of Community Medicine, Madras Medical College, Chennai, Tamil Nadu, India
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80
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Shetty S, Sivakumar S, Jana SK, Sreenivasarao G. Investigation of CHx (x = 2–4) Adsorption on Mo2C and Mo4C2 Sites Incorporated in ZSM-5 Zeolite Using Periodic-DFT Approach. Catal Letters 2017. [DOI: 10.1007/s10562-017-2199-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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81
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Kishor K, Parashtekar A, Saha S, Sivakumar S, Ramkumar J, Pala RGS. Rational design strategy for optimization of clamping pressure to minimize contact resistance between electrode and current collector while preserving porosity of electrodes in water electrolyzers. CAN J CHEM ENG 2017. [DOI: 10.1002/cjce.23036] [Citation(s) in RCA: 2] [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: 11/06/2022]
Affiliation(s)
- Koshal Kishor
- Department of Chemical Engineering; Indian Institute of Technology; Kanpur, 208016 India
| | - Alhad Parashtekar
- Materials Science Programme; Indian Institute of Technology; Kanpur, 208016 India
| | - Sulay Saha
- Department of Chemical Engineering; Indian Institute of Technology; Kanpur, 208016 India
| | - Sri Sivakumar
- Department of Chemical Engineering; Indian Institute of Technology; Kanpur, 208016 India
- Materials Science Programme; Indian Institute of Technology; Kanpur, 208016 India
| | - Janakaraman Ramkumar
- Materials Science Programme; Indian Institute of Technology; Kanpur, 208016 India
| | - Raj Ganesh S. Pala
- Department of Chemical Engineering; Indian Institute of Technology; Kanpur, 208016 India
- Materials Science Programme; Indian Institute of Technology; Kanpur, 208016 India
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82
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Mugundhan K, Balamurugan N, Chandrasekar P, Sivakumar S, Mayan MCV, Nidhin PD. Giant Intraparanchymal Neurocysticercosis. J Assoc Physicians India 2017; 65:85-86. [PMID: 29322717] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Affiliation(s)
| | | | | | | | - M C Vasif Mayan
- Post graduates in General Medicine, Govt. Mohan Kumaramangalam Medical College Hospital, Salem, Tamil Nadu
| | - P D Nidhin
- Post graduates in General Medicine, Govt. Mohan Kumaramangalam Medical College Hospital, Salem, Tamil Nadu
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83
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Rajkumar T, Taju G, Abdul Majeed S, Sinwan Sajid M, Santhosh Kumar S, Sivakumar S, Thamizhvanan S, Vimal S, Sahul Hameed AS. Ontogenetic changes in the expression of immune related genes in response to immunostimulants and resistance against white spot syndrome virus in Litopenaeus vannamei. Dev Comp Immunol 2017; 76:132-142. [PMID: 28579079 DOI: 10.1016/j.dci.2017.06.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [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: 03/09/2017] [Revised: 05/10/2017] [Accepted: 06/01/2017] [Indexed: 06/07/2023]
Abstract
In recent years, researchers have focused on viral and plant immunostimulants which could have beneficial effects in disease prevention and control in shrimp culture. At present, the application of the recombinant VP28 protein (r-VP28) and herbal immunostimulant has been considered as a more effective approach to prevent white spot syndrome (WSS) by enhancing the immune response in shrimp. In the present study, expression of selected immune related genes in response to r-VP28 and herbal immunostimulant mix (HIM) were separately studied qualitatively and quantitatively by RT-PCR and real time PCR, respectively during ontogenetic development from nauplius to juvenile stage in Litopenaeus vannamei. The mRNA expression level of immune related genes such as anti-lipopolysaccharides (ALF), Lysozyme, cMnSOD, Crustin, Prophenoloxidase, Tumor necrosis factor receptor-associated factor 6 (TRAF6) and Haemocyanin were found to be up-regulated significantly in different ontogenetic development stages of shrimp fed with r-VP28 and HIM formulated diets. Relative percent survival (RPS) was determined in shrimp fed with immunostimulants formulated diets after oral challenge with WSSV. The survival of WSSV challenged shrimp was found to be higher in immunostimulants treated groups when compared to untreated group. The results of PCR, ELISA and real time PCR revealed the absence of WSSV in WSSV-challenged shrimp after 20 days of treatment with immunostimulants. Among these immunostimulants, HIM was found to be more effective when compared to r-VP28. After a survey of literature, we are of the opinion that this might be the first report on the expression of immune genes during ontogenetic development of L. vannamei in response to immunostimulants.
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Affiliation(s)
- T Rajkumar
- Aquatic Animal Health Laboratory (OIE Reference for WTD), Department of Zoology, C. Abdul Hakeem College, Melvisharam, Tamil Nadu, India
| | - G Taju
- Aquatic Animal Health Laboratory (OIE Reference for WTD), Department of Zoology, C. Abdul Hakeem College, Melvisharam, Tamil Nadu, India
| | - S Abdul Majeed
- Aquatic Animal Health Laboratory (OIE Reference for WTD), Department of Zoology, C. Abdul Hakeem College, Melvisharam, Tamil Nadu, India
| | - M Sinwan Sajid
- Aquatic Animal Health Laboratory (OIE Reference for WTD), Department of Zoology, C. Abdul Hakeem College, Melvisharam, Tamil Nadu, India
| | - S Santhosh Kumar
- Aquatic Animal Health Laboratory (OIE Reference for WTD), Department of Zoology, C. Abdul Hakeem College, Melvisharam, Tamil Nadu, India
| | - S Sivakumar
- Aquatic Animal Health Laboratory (OIE Reference for WTD), Department of Zoology, C. Abdul Hakeem College, Melvisharam, Tamil Nadu, India
| | - S Thamizhvanan
- Aquatic Animal Health Laboratory (OIE Reference for WTD), Department of Zoology, C. Abdul Hakeem College, Melvisharam, Tamil Nadu, India
| | - S Vimal
- School of Biosciences and Technology, VIT University, Vellore, Tamil Nadu, India
| | - A S Sahul Hameed
- Aquatic Animal Health Laboratory (OIE Reference for WTD), Department of Zoology, C. Abdul Hakeem College, Melvisharam, Tamil Nadu, India.
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84
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Mishra G, Bhattacharyya S, Bhatia V, Ateeq B, Sharma A, Sivakumar S. Direct Intranuclear Anticancer Drug Delivery via Polydimethylsiloxane Nanoparticles: in Vitro and in Vivo Xenograft Studies. ACS Appl Mater Interfaces 2017; 9:34625-34633. [PMID: 28902490 DOI: 10.1021/acsami.7b08806] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Direct delivery of anticancer drugs to nuclei of tumor cells is required to enhance the therapeutic activity, which can be achieved by a nuclear localization signal (NLS) or peptide-decorated nanovehicles. However, NLS/peptide-based approaches may create certain undesirable immunological responses and the utilized synthesis processes are generally labor intensive. To this end, we report ligand-free, enhanced intranuclear delivery of Doxorubicin (Dox) to different cancer cells via porous polydimethylsiloxane (PDMS) nanoparticles (NPs). PDMS NPs were prepared by sacrificial silica template-based approach and Dox was loaded into the pores of PDMS NPs. These Dox-loaded PDMS NPs show enhanced cytotoxicity and reduce the IC50 values by 84 and 54% for HeLa and PC-3, respectively, compared to free Dox. Further, DNA damage in HeLa cells was estimated using comet assay suggesting enhanced DNA damage (72%) with Dox-loaded PDMS NPs as compared to free Dox (12%). The therapeutic efficiency of PDMS-Dox drug delivery system was tested in prostate cancer (PC-3) xenografts in NOD/SCID mice which showed enhanced tumor reduction (∼66%) as compared to free Dox. Taken together, our PDMS-Dox delivery system shows efficient and enhanced transportation of Dox to tumor cells which can be harnessed to develop advanced chemotherapy-based approaches to treat prostate and other cancers.
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Affiliation(s)
- Gargi Mishra
- Department of Chemical Engineering, Centre for Environmental Science & Engineering, Thematic Unit of Excellence in Soft Nanofabrication, ‡Material Science Programme, and §Department of Biological Sciences & Bioengineering, Indian Institute of Technology Kanpur , Kanpur 208016, Uttar Pradesh, India
| | - Souryadeep Bhattacharyya
- Department of Chemical Engineering, Centre for Environmental Science & Engineering, Thematic Unit of Excellence in Soft Nanofabrication, ‡Material Science Programme, and §Department of Biological Sciences & Bioengineering, Indian Institute of Technology Kanpur , Kanpur 208016, Uttar Pradesh, India
| | - Vipul Bhatia
- Department of Chemical Engineering, Centre for Environmental Science & Engineering, Thematic Unit of Excellence in Soft Nanofabrication, ‡Material Science Programme, and §Department of Biological Sciences & Bioengineering, Indian Institute of Technology Kanpur , Kanpur 208016, Uttar Pradesh, India
| | - Bushra Ateeq
- Department of Chemical Engineering, Centre for Environmental Science & Engineering, Thematic Unit of Excellence in Soft Nanofabrication, ‡Material Science Programme, and §Department of Biological Sciences & Bioengineering, Indian Institute of Technology Kanpur , Kanpur 208016, Uttar Pradesh, India
| | - Ashutosh Sharma
- Department of Chemical Engineering, Centre for Environmental Science & Engineering, Thematic Unit of Excellence in Soft Nanofabrication, ‡Material Science Programme, and §Department of Biological Sciences & Bioengineering, Indian Institute of Technology Kanpur , Kanpur 208016, Uttar Pradesh, India
| | - Sri Sivakumar
- Department of Chemical Engineering, Centre for Environmental Science & Engineering, Thematic Unit of Excellence in Soft Nanofabrication, ‡Material Science Programme, and §Department of Biological Sciences & Bioengineering, Indian Institute of Technology Kanpur , Kanpur 208016, Uttar Pradesh, India
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85
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Affiliation(s)
- Pratibha
- Department of Chemistry; Indian Institute of Technology Kanpur; 208016 Kanpur Uttar Pradesh India
| | - Swati Singh
- Department of Chemical Engineering; Material Science Programme; Indian Institute of Technology Kanpur; 208016 Kanpur Uttar Pradesh India
| | - Sri Sivakumar
- Department of Chemical Engineering; Material Science Programme; Indian Institute of Technology Kanpur; 208016 Kanpur Uttar Pradesh India
| | - Sandeep Verma
- Department of Chemistry; Indian Institute of Technology Kanpur; 208016 Kanpur Uttar Pradesh India
- DST Thematic Unit of Excellence on Soft Nanofabrication; Indian Institute of Technology Kanpur; 208016 Kanpur Uttar Pradesh India
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86
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Sudheendra Budhiraju V, Sharma A, Sivakumar S. Structurally Stable Mesoporous Hierarchical NiMoO4
Hollow Nanofibers for Asymmetric Supercapacitors with Enhanced Capacity and Improved Cycling Stability. ChemElectroChem 2017. [DOI: 10.1002/celc.201700503] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [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)
- Venkata Sudheendra Budhiraju
- Department of Chemical Engineering; Indian Institute of Technology Kanpur; UP, 208016 India
- Tata Research Development and Design Centre; A Division of Tata Consultancy Services Limited; 54-B, Hadapsar Industrial Estate Pune 411013 India
| | - Ashutosh Sharma
- Department of Chemical Engineering; Indian Institute of Technology Kanpur; UP, 208016 India
- Thematic Unit of Excellence on Soft Nanofabrication; Indian Institute of Technology Kanpur; UP, 208016 India
- Centre for Environmental Science & Engineering; Indian Institute of Technology Kanpur; UP, 208016 India
| | - Sri Sivakumar
- Department of Chemical Engineering; Indian Institute of Technology Kanpur; UP, 208016 India
- Thematic Unit of Excellence on Soft Nanofabrication; Indian Institute of Technology Kanpur; UP, 208016 India
- Material Science Programme; Indian Institute of Technology Kanpur; UP, 208016 India
- Centre for Environmental Science & Engineering; Indian Institute of Technology Kanpur; UP, 208016 India
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87
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Abstract
A system of two coupled cavities with N − 1 photons is shown to be dynamically equivalent to an array of N coupled cavities containing one photon. Every transition in the two cavity system has a dual phenomenon in terms of photon transport in the cavity array. This duality is employed to arrive at the required coupling strengths and nonlinearities in the cavity array so that controlled photon transfer is possible between any two cavities. This transfer of photons between two of the cavities in the array is effected without populating the other cavities. The condition for perfect transport enables perfect state transfer between any two cavities in the array. Further, possibility of high fidelity generation of generalized NOON states in two coupled cavities, which are dual to the Bell states of the photon in the cavity array, is established.
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Affiliation(s)
- Nilakantha Meher
- Materials Science Group, Indira Gandhi Centre For Atomic Research, Homi Bhabha National Institute, Kalpakkam, 603102, Tamilnadu, India
| | - S Sivakumar
- Materials Science Group, Indira Gandhi Centre For Atomic Research, Homi Bhabha National Institute, Kalpakkam, 603102, Tamilnadu, India.
| | - Prasanta K Panigrahi
- Indian Institute of Science Education and Research Kolkata, Mohanpur, 741246, West Bengal, India.
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88
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Jeyaraman J, Malecka A, Billimoria P, Shukla A, Marandi B, Patel PM, Jackson AM, Sivakumar S. Immuno-silent polymer capsules encapsulating nanoparticles for bioimaging applications. J Mater Chem B 2017; 5:5251-5258. [PMID: 32264110 DOI: 10.1039/c7tb01044c] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
PEGylated polymer capsules encapsulating LaVO4:Tb3+, GdVO4:Tb3+, Gd2O3:Tb3+, GdF3:Tb3+, YVO4:Tb3+ and iron oxide nanoparticles are promising new fluorescence, magnetic and magnetofluorescence imaging agents. Recently, we have reported their in vitro and in vivo level toxicity profiles which show the non-toxic nature of these polymer capsules encapsulating nanoparticles. However, prior to clinical use, it is essential to ensure that these agents are unlikely to activate immune responses. Herein, we investigated the immunocompatibility of polymer capsules with dendritic cells (DCs), macrophages (MOs), and major antigen presenting cell (APC) subsets required for the activation of innate and adaptive immunity. The capsules were efficiently internalized by both DCs and MOs in vitro. Importantly, despite the presence of intracellular capsules, there was no significant impact on the viability of the cells. We studied the impact of different capsules on the cytokine profiles of the DCs and MOs, which is known to be important for the polarization of T-cell immunity. None of the capsules elicited a change in cytokine secretion from the DCs. Furthermore, the capsules did not alter the polarization of either M1 or M2 MO subsets as determined by the balance of IL-12 and IL-10 secretion. These data support the notion that PEGylated polymer capsules loaded with nanoparticles have the potential to remain immunologically silent as they do not activate APCs nor do they hinder the response of DCs or MOs to pathogen activating signals. These systems, therefore, exhibit promising characteristics for bioimaging applications.
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Affiliation(s)
- Jaishree Jeyaraman
- Department of Chemical Engineering, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh-208016, India.
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89
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Budhiraju VS, Kumar R, Sharma A, Sivakumar S. Structurally stable hollow mesoporous graphitized carbon nanofibers embedded with NiMoO 4 nanoparticles for high performance asymmetric supercapacitors. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.04.039] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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90
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Santhoshkumar S, Sivakumar S, Vimal S, Abdul Majeed S, Taju G, Haribabu P, Uma A, Sahul Hameed AS. Biochemical changes and tissue distribution of Enterocytozoon hepatopenaei (EHP) in naturally and experimentally EHP-infected whiteleg shrimp, Litopenaeus vannamei (Boone, 1931), in India. J Fish Dis 2017; 40:529-539. [PMID: 27524805 DOI: 10.1111/jfd.12530] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [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: 05/04/2016] [Revised: 06/11/2016] [Accepted: 06/14/2016] [Indexed: 06/06/2023]
Abstract
Stunted growth in pond-reared Litopenaeus vannamei was observed in different farms located in Tamil Nadu and Andhra Pradesh, India. No mortality was associated with stunted growth. PCR assay on these samples revealed the presence of Enterocytozoon hepatopenaei (EHP) in stunted shrimp. Tissue distribution of EHP in naturally and experimentally infected shrimp was studied by PCR and histology. Histological examination revealed the presence of EHP in hepatopancreas and gut, but not in other organs. The PCR assay revealed the presence of EHP in all the organs tested in both naturally and experimentally infected shrimp. Healthy shrimp were challenged with E. hepatopenaei by intramuscular injection and oral route, and no mortality was observed in both routes after 30 days post-challenge. Different developmental stages of the microsporidian parasite were observed in the hepatopancreatic epithelial cells. Biochemical parameters such as total protein, albumin, aspartate transaminase (AST), alanine transaminase (ALT) and alkaline phosphatase were measured in the haemolymph of naturally and experimentally EHP-infected shrimp. All biochemical parameters mentioned were found to be significantly higher in EHP-infected shrimp when compared to normal shrimp. This is the first report relating AST and ALT levels to EHP infection in naturally and experimentally infected shrimp.
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Affiliation(s)
- S Santhoshkumar
- OIE Reference Laboratory for WTD, Department of Zoology, C. Abdul Hakeem College, Melvisharam, Tamil Nadu, India
| | - S Sivakumar
- OIE Reference Laboratory for WTD, Department of Zoology, C. Abdul Hakeem College, Melvisharam, Tamil Nadu, India
| | - S Vimal
- Biomolecules Division, School of Biosciences and Technology, VIT University, Vellore, Tamil Nadu, India
| | - S Abdul Majeed
- OIE Reference Laboratory for WTD, Department of Zoology, C. Abdul Hakeem College, Melvisharam, Tamil Nadu, India
| | - G Taju
- OIE Reference Laboratory for WTD, Department of Zoology, C. Abdul Hakeem College, Melvisharam, Tamil Nadu, India
| | - P Haribabu
- Department of Aquatic Animal Health Management, College of Fishery Science, S.V.V. University, Mutukur, Andhra Pradesh, India
| | - A Uma
- Fisheries Research and Extension Centre, Tamil Nadu Fisheries University, Chennai, Tamil Nadu, India
| | - A S Sahul Hameed
- OIE Reference Laboratory for WTD, Department of Zoology, C. Abdul Hakeem College, Melvisharam, Tamil Nadu, India
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91
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Arulraj R, Sivakumar S, Kaur M, Thiruvalluvar A, Jasinski JP. Crystal structures of three 3-chloro-3-methyl-2,6-di-aryl-piperidin-4-ones. Acta Crystallogr E Crystallogr Commun 2017; 73:107-111. [PMID: 28217321 PMCID: PMC5290544 DOI: 10.1107/s2056989016020661] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2016] [Accepted: 12/29/2016] [Indexed: 11/29/2022]
Abstract
The syntheses and crystal structure of 3-chloro-3-methyl-r-2,c-6-di-phenyl-piperidin-4-one, C18H18ClNO, (I), 3-chloro-3-methyl-r-2,c-6-di-p-tolyl-piperidin-4-one, C20H22ClNO, (II), and 3-chloro-3-methyl-r-2,c-6-bis-(4-chloro-phen-yl)piperidin-4-one, C18H16Cl3NO, (III), are described. In each structure, the piperidine ring adopts a chair conformation and dihedral angles between the mean planes of the phenyl rings are 58.4 (2), 73.5 (5) and 78.6 (2)° in (I), (II) and (III), respectively. In the crystals, mol-ecules are linked into C(6) chains by weak N-H⋯O hydrogen bonds and C-H⋯π inter-actions are also observed.
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Affiliation(s)
- R. Arulraj
- Research and Development Centre, Bharathiar University, Coimbatore 641 046, Tamilnadu, India
| | - S. Sivakumar
- Research and Development Centre, Bharathiar University, Coimbatore 641 046, Tamilnadu, India
- Department of Chemistry, Thiruvalluvar Arts and Science College, Kurinjipadi 607 302, Tamilnadu, India
| | - Manpreet Kaur
- Department of Chemistry, Keene State College, 229 Main Street, Keene, NH 03435-2001, USA
| | - A. Thiruvalluvar
- Principal, Government College for Women (Autonomous), Kumbakonam 612 001, Tamilnadu, India
| | - Jerry P. Jasinski
- Department of Chemistry, Keene State College, 229 Main Street, Keene, NH 03435-2001, USA
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92
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Sahana S, Mishra G, Sivakumar S, Bharadwaj PK. Highly sensitive and selective “turn-on” chemodosimeter based on Cu2+- promoted hydrolysis for nanomolar detection of Cu2+ and its application in confocal cell imaging. J Photochem Photobiol A Chem 2017. [DOI: 10.1016/j.jphotochem.2016.10.035] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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93
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Mugundhan K, Arasi KV, Balamurugan N, Chandrasekaran P, Thiruvarutchelvan K, Sivakumar S. Carcinoma Prostate Presenting as Multiple Cranial Nerve Palsy. J Assoc Physicians India 2017; 65:92-93. [PMID: 28457045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Metastatic prostatic carcinoma commonly involves bones and extra pelvic lymph nodes. CNS involvement is unusual and particularly the occurence of leptomeningeal metastasis is extremely rare, with few cases described in the literature.1 The reported incidence at autopsy vary from 0.6 to 4.4 percent.2 We report a 65 year old male who presented with multiple cranial nerve palsies due to leptomeningeal metastasis in carcinoma prostate treated with orchidectomy and planned for radiotherapy and antiandrogen therapy.
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Affiliation(s)
| | - K V Arasi
- Senior Assistant Professor of Urology
| | | | | | | | - S Sivakumar
- Head of the Dept., Dept. of Neurology, Govt. Mohan Kumaramangalam Medical College Hospital, Salem, Tamil Nadu
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94
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Singh K, Singh S, Srivastava P, Sivakumar S, Patra AK. Lanthanoplatins: emissive Eu(iii) and Tb(iii) complexes staining nucleoli targeted through Pt–DNA crosslinking. Chem Commun (Camb) 2017; 53:6144-6147. [DOI: 10.1039/c7cc02047c] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Luminescent photostable heterometallic LnPt2 complexes were designed for their preferential nucleoli staining through formation of Pt–DNA cross-links observed through fluorescence microscopy.
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Affiliation(s)
- Khushbu Singh
- Department of Chemistry
- Indian Institute of Technology Kanpur
- Kanpur 208016
- India
| | - Swati Singh
- Department of Chemical Engineering and Centre for Environmental Science and Engineering
- Indian Institute of Technology Kanpur
- Kanpur 208016
- India
| | - Payal Srivastava
- Department of Chemistry
- Indian Institute of Technology Kanpur
- Kanpur 208016
- India
| | - Sri Sivakumar
- Department of Chemical Engineering and Centre for Environmental Science and Engineering
- Indian Institute of Technology Kanpur
- Kanpur 208016
- India
| | - Ashis K. Patra
- Department of Chemistry
- Indian Institute of Technology Kanpur
- Kanpur 208016
- India
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95
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Schuster R, Kinne J, Sivakumar S, Nagy P, Juhasz J, Ismail A, Baumann M. The epidemiology of physocephalosis in camel in the united arab emirates. J CAMEL PRACT RES 2017. [DOI: 10.5958/2277-8934.2017.00035.2] [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: 10/17/2022]
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96
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Kaliyaperumal V, Raphael CJ, Varghese KM, Gopu P, Sivakumar S, Boban M, Raj NAN, Senthilnathan K, Babu PR. Study of Variation in Dose Calculation Accuracy Between kV Cone-Beam Computed Tomography and kV fan-Beam Computed Tomography. J Med Phys 2017; 42:171-180. [PMID: 28974864 PMCID: PMC5618465 DOI: 10.4103/jmp.jmp_24_17] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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] [Indexed: 02/06/2023] Open
Abstract
Cone-beam computed tomography (CBCT) images are presently used for geometric verification for daily patient positioning. In this work, we have compared the images of CBCT with the images of conventional fan beam CT (FBCT) in terms of image quality and Hounsfield units (HUs). We also compared the dose calculated using CBCT with that of FBCT. Homogenous RW3 plates and Catphan phantom were scanned by FBCT and CBCT. In RW3 and Catphan phantom, percentage depth dose (PDD), profiles, isodose distributions (for intensity modulated radiotherapy plans), and calculated dose volume histograms were compared. The HU difference was within ± 20 HU (central region) and ± 30 HU (peripheral region) for homogeneous RW3 plates. In the Catphan phantom, the difference in HU was ± 20 HU in the central area and peripheral areas. The HU differences were within ± 30 HU for all HU ranges starting from -1000 to 990 in phantom and patient images. In treatment plans done with simple symmetric and asymmetric fields, dose difference (DD) between CBCT plan and FBCT plan was within 1.2% for both phantoms. In intensity modulated radiotherapy (IMRT) treatment plans, for different target volumes, the difference was <2%. This feasibility study investigated HU variation and dose calculation accuracy between FBCT and CBCT based planning and has validated inverse planning algorithms with CBCT. In our study, we observed a larger deviation of HU values in the peripheral region compared to the central region. This is due to the ring artifact and scatter contribution which may prevent the use of CBCT as the primary imaging modality for radiotherapy treatment planning. The reconstruction algorithm needs to be modified further for improving the image quality and accuracy in HU values. However, our study with TG-119 and intensity modulated radiotherapy test targets shows that CBCT can be used for adaptive replanning as the recalculation of dose with the anisotropic analytical algorithm is in full accord with conventional planning CT except in the build-up regions. Patient images with CBCT have to be carefully analyzed for any artifacts before using them for such dose calculations.
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Affiliation(s)
| | - C Jomon Raphael
- Department of Radiation Oncology, Amala Institute of Medical Sciences, Thrissur, Kerala, India
| | - K Mathew Varghese
- Department of Radiation Oncology, Amala Institute of Medical Sciences, Thrissur, Kerala, India
| | - Paul Gopu
- Department of Radiation Oncology, Amala Institute of Medical Sciences, Thrissur, Kerala, India
| | - S Sivakumar
- Department of Radiation Oncology, Amala Institute of Medical Sciences, Thrissur, Kerala, India
| | - Minu Boban
- Department of Radiation Oncology, Amala Institute of Medical Sciences, Thrissur, Kerala, India
| | - N Arunai Nambi Raj
- Centre for Biomaterials, Cellular and Molecular Theranostics, VIT University, Vellore, Tamil Nadu, India
| | - K Senthilnathan
- Department of Physics, School of Advanced Sciences VIT University, Vellore, Tamil Nadu, India
| | - P Ramesh Babu
- Department of Physics, School of Advanced Sciences VIT University, Vellore, Tamil Nadu, India
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Abstract
In the title compound, C24H24N2O [systematic name: (E)-3-benzyl-2,6-diphenylpiperidin-4-one oxime], the piperidine ring adopts a slightly distorted chair conformation and the phenyl rings and the benzyl group substituents are attached equatorially. The oxime group makes a dihedral angle of 42.88 (12)° with the piperidine ring. The dihedral angle between the phenyl rings is 71.96 (8)°. The benzyl ring makes dihedral angles of 63.01 (8) and 59.35 (8)° with the two phenyl rings. In the crystal, molecules are linked by O—H...N hydrogen bonds, formingC(7) chains along thecaxis. The chains are linked by C—H...π interactions, forming slabs lying parallel to thebcplane.
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98
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Behara DK, Sharma GP, Upadhyay AP, Gyanprakash M, Pala RGS, Sivakumar S. Synchronization of charge carrier separation by tailoring the interface of Si–Au–TiO2 heterostructures via click chemistry for PEC water splitting. Chem Eng Sci 2016. [DOI: 10.1016/j.ces.2016.06.063] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [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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99
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Dasari S, Singh S, Sivakumar S, Patra AK. Dual-Sensitized Luminescent Europium(ΙΙΙ) and Terbium(ΙΙΙ) Complexes as Bioimaging and Light-Responsive Therapeutic Agents. Chemistry 2016; 22:17387-17396. [DOI: 10.1002/chem.201603453] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Indexed: 12/13/2022]
Affiliation(s)
- Srikanth Dasari
- Department of Chemistry; Indian Institute of Technology Kanpur; Kanpur 208016, Uttar Pradesh India
| | - Swati Singh
- Department of Chemical Engineering and Centre for Environmental Science and Engineering; Indian Institute of Technology Kanpur; Kanpur 208016, Uttar Pradesh India
| | - Sri Sivakumar
- Department of Chemical Engineering and Centre for Environmental Science and Engineering; Indian Institute of Technology Kanpur; Kanpur 208016, Uttar Pradesh India
| | - Ashis K. Patra
- Department of Chemistry; Indian Institute of Technology Kanpur; Kanpur 208016, Uttar Pradesh India
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100
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Abstract
The title compound, C18H16ClF2NO, contains one independent molecule in the asymmetric unit, with the piperidin-4-one ring adopting a slightly distorted chair conformation and an equatorial orientation of all the substituents except chlorine. A single weak intermolecular C—H...O interaction influences the crystal packing, forming infinite one-dimensional zigzag chains along the a axis. The structure was refined as a two-component inversion twin.
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