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Naskar S, Deepa M. Separator-free Zn-ion Battery with Mn:V 3O 7·H 2O Nanobelts and a Zn 2+-Polyacrylamide Semisolid Electrolyte with Ultralong Cycle Life. ACS Appl Mater Interfaces 2023. [PMID: 37470169 DOI: 10.1021/acsami.3c06490] [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] [Indexed: 07/21/2023]
Abstract
Vanadium based oxides are immensely suitable for zinc-ion-batteries (ZIBs) due to their layered and stable crystal structures. In this study, Mn doped V3O7·H2O nanobelts were synthesized and used as cathodes in ZIBs for the very first time and the doped oxide exhibited an enhanced capacity of 258 mAh g-1 compared to its undoped counterpart (208 mAh g-1) at the same current density of 40 mA g-1. Mn:V3O7·H2O outperforms the V3O7·H2O due to the superior bulk electrical conductivity as well as higher nanoscale current carrying capability imparted by a high proportion of mixed valent states of Mn3+, Mn2+, V5+, and V4+ and the smaller crystallite size that affords short diffusion lengths for Zn2+ ions. The Mn:V3O7·H2O cathode is coupled with a Zn2+ ion conducting polyacrylamide gel electrolyte and a Zn flakes/activated carbon (Zn Fs/C) composite anode to yield a unique separator free Mn:V3O7·H2O/Zn2+-PAM gel/Zn-Fs/C battery. The cell exhibits a capacity of ∼205 mAh g-1 (at 40 mA g-1) and retains 99% of its original capacity after 3500 cycles. The Zn2+-PAM gel shows a high ionic conductivity in the range of 5.9 to 28.2 S cm-1, over a wide temperature span of 0 to 70 °C, and a wide electrochemical potential stability window of -0.5 to +2.3 V, thus rendering it suitable for low temperature applications as well. The gel also inhibits dendritic growth of Zn over the Zn-Fs/C anode through regulated flow of Zn2+ ions during charging, prevents cathode dissolution, and improves cycle life via preservation of structural integrity of the Mn:V3O7·H2O cathode after 200 charge-discharge cycles. This is a highly scalable cell configuration and opens up opportunities to produce long lasting batteries completely free of costly separators with a semisolid free-standing electrolyte and a robust doped oxide.
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Affiliation(s)
- Souvik Naskar
- Department of Chemistry, Indian Institute of Technology Hyderabad, Kandi, Sangareddy502284, Telangana, India
| | - Melepurath Deepa
- Department of Chemistry, Indian Institute of Technology Hyderabad, Kandi, Sangareddy502284, Telangana, India
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2
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Naskar S, Nandi G, Ghosh T. An examination of the reaction pathways of XO + O → X + O2 (X = Br and I). COMPUT THEOR CHEM 2022. [DOI: 10.1016/j.comptc.2022.113864] [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: 11/28/2022]
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3
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Barman K, Konwar D, Sarma D, Thomas R, Naskar S, Pegu S, Banik S, Mohan N, Tamuli M, Kaushik P, Rajkhowa S. Effect of supplementation of methionine chelated trace minerals on growth, nutrient utilization and blood profiles in crossbred (Hampshire X Ghungroo) finisher pigs. ANIM NUTR FEED TECHN 2022. [DOI: 10.5958/0974-181x.2022.00003.8] [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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Naskar S, Nandi G, Ghosh TK. Ab initio study of the mechanism of the reaction ClO + O --> Cl + O2. J MEX CHEM SOC 2021. [DOI: 10.29356/jmcs.v66i1.1628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Abstract. Ab initio investigation on the reaction mechanism of ClO + O --> Cl + O2 reaction has been performed using correlation consistent triple zeta basis set. The geometry and frequency of the reactants, products, minimum energy geometries and transition states are obtained using MP2 method and energetics are obtained at the QCISD(T)//MP2 level of theory. Primarily, a possible reaction mechanism is obtained on the basis on IRC calculations using MP2 level of theory. To obtain true picture of the reaction path, we performed IRC calculations using CASSCF method with a minimal basis set 6-31G**. Some new equilibrium geometries and transition states have been identified at the CASSCF level. Energetics are also obtained at the QCISD(T)//CASSCF method. Possible reaction paths have been discussed, which are new in literature. Heat of reaction is found to be consistent with the experimental data. Bond dissociation energies to various dissociation paths are also reported.
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Briggs NS, Bruce KE, Naskar S, Winkler ME, Roper DI. The Pneumococcal Divisome: Dynamic Control of Streptococcus pneumoniae Cell Division. Front Microbiol 2021; 12:737396. [PMID: 34737730 PMCID: PMC8563077 DOI: 10.3389/fmicb.2021.737396] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Accepted: 09/15/2021] [Indexed: 12/14/2022] Open
Abstract
Cell division in Streptococcus pneumoniae (pneumococcus) is performed and regulated by a protein complex consisting of at least 14 different protein elements; known as the divisome. Recent findings have advanced our understanding of the molecular events surrounding this process and have provided new understanding of the mechanisms that occur during the division of pneumococcus. This review will provide an overview of the key protein complexes and how they are involved in cell division. We will discuss the interaction of proteins in the divisome complex that underpin the control mechanisms for cell division and cell wall synthesis and remodelling that are required in S. pneumoniae, including the involvement of virulence factors and capsular polysaccharides.
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Affiliation(s)
- Nicholas S. Briggs
- School of Life Sciences, University of Warwick, Coventry, United Kingdom
| | - Kevin E. Bruce
- Department of Biology, Indiana University Bloomington, Bloomington, IN, United States
| | - Souvik Naskar
- Department of Infectious Disease, Imperial College London, London, United Kingdom
| | - Malcolm E. Winkler
- Department of Biology, Indiana University Bloomington, Bloomington, IN, United States
| | - David I. Roper
- School of Life Sciences, University of Warwick, Coventry, United Kingdom
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Liu J, Tassinari M, Souza DP, Naskar S, Noel JK, Bohuszewicz O, Buck M, Williams TA, Baum B, Low HH. Bacterial Vipp1 and PspA are members of the ancient ESCRT-III membrane-remodeling superfamily. Cell 2021; 184:3660-3673.e18. [PMID: 34166615 PMCID: PMC8281802 DOI: 10.1016/j.cell.2021.05.041] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Revised: 11/24/2020] [Accepted: 05/25/2021] [Indexed: 12/31/2022]
Abstract
Membrane remodeling and repair are essential for all cells. Proteins that perform these functions include Vipp1/IM30 in photosynthetic plastids, PspA in bacteria, and ESCRT-III in eukaryotes. Here, using a combination of evolutionary and structural analyses, we show that these protein families are homologous and share a common ancient evolutionary origin that likely predates the last universal common ancestor. This homology is evident in cryo-electron microscopy structures of Vipp1 rings from the cyanobacterium Nostoc punctiforme presented over a range of symmetries. Each ring is assembled from rungs that stack and progressively tilt to form dome-shaped curvature. Assembly is facilitated by hinges in the Vipp1 monomer, similar to those in ESCRT-III proteins, which allow the formation of flexible polymers. Rings have an inner lumen that is able to bind and deform membranes. Collectively, these data suggest conserved mechanistic principles that underlie Vipp1, PspA, and ESCRT-III-dependent membrane remodeling across all domains of life.
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Affiliation(s)
- Jiwei Liu
- Department of Infectious Disease, Imperial College, London, UK
| | | | - Diorge P Souza
- MRC Laboratory for Molecular Cell Biology, University College London, London, UK; Division of Cell Biology, MRC Laboratory of Molecular Biology, Cambridge, UK
| | - Souvik Naskar
- Department of Infectious Disease, Imperial College, London, UK
| | - Jeffrey K Noel
- Max Delbrück Center for Molecular Medicine, Berlin, Germany
| | | | - Martin Buck
- Department of Life Sciences, Imperial College, London, UK
| | - Tom A Williams
- School of Biological Sciences, University of Bristol, Bristol, UK
| | - Buzz Baum
- MRC Laboratory for Molecular Cell Biology, University College London, London, UK; Division of Cell Biology, MRC Laboratory of Molecular Biology, Cambridge, UK; Institute for the Physics of Living Systems, University College London, London, UK.
| | - Harry H Low
- Department of Infectious Disease, Imperial College, London, UK.
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Kedare GM, . V, Karunakaran M, Mandal A, Ghosh MK, Naskar S. Effect of area specific mineral mixture supplementation on milk production, biochemical and blood mineral status of Black Bengal goats. IJDS 2021. [DOI: 10.33785/ijds.2021.v74i02.007] [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: 11/23/2022]
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Mukhopadhyay T, Naskar S, Gupta KK, Kumar R, Dey S, Adhikari S. Probing the Stochastic Dynamics of Coronaviruses: Machine Learning Assisted Deep Computational Insights with Exploitable Dimensions. Adv Theory Simul 2021. [DOI: 10.1002/adts.202000291] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- T. Mukhopadhyay
- Department of Aerospace Engineering Indian Institute of Technology Kanpur Kanpur India
| | - S. Naskar
- Department of Aerospace Engineering Indian Institute of Technology Bombay Mumbai India
| | - K. K. Gupta
- Department of Mechanical Engineering National Institute of Technology Silchar Silchar India
| | - R. Kumar
- Department of Mechanical Engineering National Institute of Technology Silchar Silchar India
| | - S. Dey
- Department of Mechanical Engineering National Institute of Technology Silchar Silchar India
| | - S. Adhikari
- College of Engineering Swansea University Swansea United Kingdom
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Pirger Z, László Z, Naskar S, Crossley M, O'Shea M, Benjamin PR, Kemenes G, Kemenes I. Interneuronal mechanisms for learning-induced switch in a sensory response that anticipates changes in behavioral outcomes. Curr Biol 2021. [PMID: 33571436 DOI: 10.1101/2020.02.12.944553v2] [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] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Sensory cues in the natural environment predict reward or punishment, important for survival. For example, the ability to detect attractive tastes indicating palatable food is essential for foraging while the recognition of inedible substrates prevents harm. While some of these sensory responses are innate, they can undergo fundamental changes due to prior experience associated with the stimulus. However, the mechanisms underlying such behavioral switching of an innate sensory response at the neuron and network levels require further investigation. We used the model learning system of Lymnaea stagnalis1-3 to address the question of how an anticipated aversive outcome reverses the behavioral response to a previously effective feeding stimulus, sucrose. Key to the switching mechanism is an extrinsic inhibitory interneuron of the feeding network, PlB (pleural buccal4,5), which is inhibited by sucrose to allow a feeding response. After multi-trial aversive associative conditioning, pairing sucrose with strong tactile stimuli to the head, PlB's firing rate increases in response to sucrose application to the lips and the feeding response is suppressed; this learned response is reversed by the photoinactivation of a single PlB. A learning-induced persistent change in the cellular properties of PlB that results in an increase rather than a decrease in its firing rate in response to sucrose provides a neurophysiological mechanism for this behavioral switch. A key interneuron, PeD12 (Pedal-Dorsal 12), of the defensive withdrawal network5,6 does not mediate the conditioned suppression of feeding, but its facilitated output contributes to the sensitization of the withdrawal response.
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Affiliation(s)
- Zsolt Pirger
- Sussex Neuroscience, School of Life Sciences, University of Sussex, Brighton BN1 9QG, UK
| | - Zita László
- Sussex Neuroscience, School of Life Sciences, University of Sussex, Brighton BN1 9QG, UK
| | - Souvik Naskar
- Sussex Neuroscience, School of Life Sciences, University of Sussex, Brighton BN1 9QG, UK
| | - Michael Crossley
- Sussex Neuroscience, School of Life Sciences, University of Sussex, Brighton BN1 9QG, UK
| | - Michael O'Shea
- Sussex Neuroscience, School of Life Sciences, University of Sussex, Brighton BN1 9QG, UK
| | - Paul R Benjamin
- Sussex Neuroscience, School of Life Sciences, University of Sussex, Brighton BN1 9QG, UK
| | - György Kemenes
- Sussex Neuroscience, School of Life Sciences, University of Sussex, Brighton BN1 9QG, UK
| | - Ildikó Kemenes
- Sussex Neuroscience, School of Life Sciences, University of Sussex, Brighton BN1 9QG, UK.
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Naskar S, Hohl M, Tassinari M, Low HH. The structure and mechanism of the bacterial type II secretion system. Mol Microbiol 2020; 115:412-424. [PMID: 33283907 DOI: 10.1111/mmi.14664] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Revised: 12/03/2020] [Indexed: 12/17/2022]
Abstract
The type II secretion system (T2SS) is a multi-protein complex used by many bacteria to move substrates across their cell membrane. Substrates released into the environment serve as local and long-range effectors that promote nutrient acquisition, biofilm formation, and pathogenicity. In both animals and plants, the T2SS is increasingly recognized as a key driver of virulence. The T2SS spans the bacterial cell envelope and extrudes substrates through an outer membrane secretin channel using a pseudopilus. An inner membrane assembly platform and a cytoplasmic motor controls pseudopilus assembly. This microreview focuses on the structure and mechanism of the T2SS. Advances in cryo-electron microscopy are enabling increasingly elaborate sub-complexes to be resolved. However, key questions remain regarding the mechanism of pseudopilus extension and retraction, and how this is coupled with the choreography of the substrate moving through the secretion system. The T2SS is part of an ancient type IV filament superfamily that may have been present within the last universal common ancestor (LUCA). Overall, mechanistic principles that underlie T2SS function have implication for other closely related systems such as the type IV and tight adherence pilus systems.
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Affiliation(s)
- Souvik Naskar
- Department of Infectious Disease, Imperial College, London, UK
| | - Michael Hohl
- Department of Infectious Disease, Imperial College, London, UK
| | | | - Harry H Low
- Department of Infectious Disease, Imperial College, London, UK
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Mukhopadhyay T, Mahata A, Naskar S, Adhikari S. Probing the Effective Young's Modulus of ‘Magic Angle’ Inspired Multi‐Functional Twisted Nano‐Heterostructures. Adv Theory Simul 2020. [DOI: 10.1002/adts.202000129] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- T. Mukhopadhyay
- Department of Aerospace Engineering Indian Institute of Technology Kanpur Kanpur India
| | - A. Mahata
- School of Engineering Brown University Providence Rhode Island USA
| | - S. Naskar
- Department of Aerospace Engineering Indian Institute of Technology Bombay Bombay India
| | - S. Adhikari
- College of Engineering Swansea University Swansea UK
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12
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Crossley M, Lorenzetti FD, Naskar S, O’Shea M, Kemenes G, Benjamin PR, Kemenes I. Proactive and retroactive interference with associative memory consolidation in the snail Lymnaea is time and circuit dependent. Commun Biol 2019; 2:242. [PMID: 31263786 PMCID: PMC6595009 DOI: 10.1038/s42003-019-0470-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Accepted: 05/18/2019] [Indexed: 12/29/2022] Open
Abstract
Interference-based forgetting occurs when new information acquired either before or after a learning event attenuates memory expression (proactive and retroactive interference, respectively). Multiple learning events often occur in rapid succession, leading to competition between consolidating memories. However, it is unknown what factors determine which memory is remembered or forgotten. Here, we challenge the snail, Lymnaea, to acquire two consecutive similar or different memories and identify learning-induced changes in neurons of its well-characterized motor circuits. We show that when new learning takes place during a stable period of the original memory, proactive interference only occurs if the two consolidating memories engage the same circuit mechanisms. If different circuits are used, both memories survive. However, any new learning during a labile period of consolidation promotes retroactive interference and the acquisition of the new memory. Therefore, the effect of interference depends both on the timing of new learning and the underlying neuronal mechanisms.
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Affiliation(s)
- Michael Crossley
- Sussex Neuroscience, School of Life Sciences, University of Sussex, Brighton, BN1 9QG UK
| | | | - Souvik Naskar
- Sussex Neuroscience, School of Life Sciences, University of Sussex, Brighton, BN1 9QG UK
| | - Michael O’Shea
- Sussex Neuroscience, School of Life Sciences, University of Sussex, Brighton, BN1 9QG UK
| | - György Kemenes
- Sussex Neuroscience, School of Life Sciences, University of Sussex, Brighton, BN1 9QG UK
| | - Paul R. Benjamin
- Sussex Neuroscience, School of Life Sciences, University of Sussex, Brighton, BN1 9QG UK
| | - Ildikó Kemenes
- Sussex Neuroscience, School of Life Sciences, University of Sussex, Brighton, BN1 9QG UK
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Goodyear RJ, Cheatham MA, Naskar S, Zhou Y, Osgood RT, Zheng J, Richardson GP. Accelerated Age-Related Degradation of the Tectorial Membrane in the Ceacam16βgal/βgal Null Mutant Mouse, a Model for Late-Onset Human Hereditary Deafness DFNB113. Front Mol Neurosci 2019; 12:147. [PMID: 31249509 PMCID: PMC6582249 DOI: 10.3389/fnmol.2019.00147] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Accepted: 05/20/2019] [Indexed: 12/20/2022] Open
Abstract
CEACAM16 is a non-collagenous protein of the tectorial membrane, an extracellular structure of the cochlea essential for normal hearing. Dominant and recessive mutations in CEACAM16 have been reported to cause postlingual and progressive forms of deafness in humans. In a previous study of young Ceacam16βgal/βgal null mutant mice on a C57Bl/6J background, the incidence of spontaneous otoacoustic emissions (SOAEs) was greatly increased relative to Ceacam16+/+ and Ceacam16+/βgal mice, but auditory brain-stem responses (ABRs) and distortion product otoacoustic emissions (DPOAEs) were near normal, indicating auditory thresholds were not significantly affected. To determine if the loss of CEACAM16 leads to hearing loss at later ages in this mouse line, cochlear structure and auditory function were examined in Ceacam16+/+, Ceacam16+/βgal and Ceacam16βgal/βgal mice at 6 and 12 months of age and compared to that previously described at 1 month. Analysis of older Ceacam16βgal/βgal mice reveals a progressive loss of matrix from the core of the tectorial membrane that is more extensive in the apical, low-frequency regions of the cochlea. In Ceacam16βgal/βgal mice at 6-7 months, the DPOAE magnitude at 2f1-f2 and the incidence of SOAEs both decrease relative to young animals. By ∼12 months, SOAEs and DPOAEs are not detected in Ceacam16βgal/βgal mice and ABR thresholds are increased by up to ∼40 dB across frequency, despite a complement of hair cells similar to that present in Ceacam16+/+ mice. Although SOAE incidence decreases with age in Ceacam16βgal/βgal mice, it increases in aging heterozygous Ceacam16+/βgal mice and is accompanied by a reduction in the accumulation of CEACAM16 in the tectorial membrane relative to controls. An apically-biased loss of matrix from the core of the tectorial membrane, similar to that observed in young Ceacam16βgal/βgal mice, is also seen in Ceacam16+/+ and Ceacam16+/βgal mice, and other strains of wild-type mice, but at much later ages. The loss of Ceacam16 therefore accelerates age-related degeneration of the tectorial membrane leading, as in humans with mutations in CEACAM16, to a late-onset progressive form of hearing loss.
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Affiliation(s)
- Richard J. Goodyear
- Sussex Neuroscience, School of Life Sciences, University of Sussex, Brighton, United Kingdom
| | - Mary Ann Cheatham
- The Knowles Hearing Center, Northwestern University, Evanston, IL, United States
- Roxelyn and Richard Pepper Department of Communication Sciences and Disorders, Northwestern University, Evanston, IL, United States
| | - Souvik Naskar
- Sussex Neuroscience, School of Life Sciences, University of Sussex, Brighton, United Kingdom
| | - Yingjie Zhou
- Roxelyn and Richard Pepper Department of Communication Sciences and Disorders, Northwestern University, Evanston, IL, United States
| | - Richard T. Osgood
- Sussex Neuroscience, School of Life Sciences, University of Sussex, Brighton, United Kingdom
| | - Jing Zheng
- The Knowles Hearing Center, Northwestern University, Evanston, IL, United States
- Department of Otolaryngology – Head and Neck Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL, United States
| | - Guy P. Richardson
- Sussex Neuroscience, School of Life Sciences, University of Sussex, Brighton, United Kingdom
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Korneev SA, Vavoulis DV, Naskar S, Dyakonova VE, Kemenes I, Kemenes G. A CREB2-targeting microRNA is required for long-term memory after single-trial learning. Sci Rep 2018; 8:3950. [PMID: 29500383 PMCID: PMC5834643 DOI: 10.1038/s41598-018-22278-w] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Accepted: 02/12/2018] [Indexed: 02/01/2023] Open
Abstract
Although single-trial induced long-term memories (LTM) have been of major interest in neuroscience, how LTM can form after a single episode of learning remains largely unknown. We hypothesized that the removal of molecular inhibitory constraints by microRNAs (miRNAs) plays an important role in this process. To test this hypothesis, first we constructed small non-coding RNA (sncRNA) cDNA libraries from the CNS of Lymnaea stagnalis subjected to a single conditioning trial. Then, by next generation sequencing of these libraries, we identified a specific pool of miRNAs regulated by training. Of these miRNAs, we focussed on Lym-miR-137 whose seed region shows perfect complementarity to a target sequence in the 3' UTR of the mRNA for CREB2, a well-known memory repressor. We found that Lym-miR-137 was transiently up-regulated 1 h after single-trial conditioning, preceding a down-regulation of Lym-CREB2 mRNA. Furthermore, we discovered that Lym-miR-137 is co-expressed with Lym-CREB2 mRNA in an identified neuron with an established role in LTM. Finally, using an in vivo loss-of-function approach we demonstrated that Lym-miR-137 is required for single-trial induced LTM.
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Affiliation(s)
- Sergei A Korneev
- Sussex Neuroscience, School of Life Sciences, University of Sussex, Brighton, BN1 9QG, UK.
| | - Dimitris V Vavoulis
- RDM Nuffield Division of Clinical Laboratory Sciences, University of Oxford, Clifton, BS8 1UB, UK
| | - Souvik Naskar
- Sussex Neuroscience, School of Life Sciences, University of Sussex, Brighton, BN1 9QG, UK
| | - Varvara E Dyakonova
- Koltzov Institute of Developmental Biology, Russian Academy of Sciences, Moscow, 119334, Russia
| | - Ildikó Kemenes
- Sussex Neuroscience, School of Life Sciences, University of Sussex, Brighton, BN1 9QG, UK
| | - György Kemenes
- Sussex Neuroscience, School of Life Sciences, University of Sussex, Brighton, BN1 9QG, UK
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Vashi Y, Naskar S, Chutia T, Banik S, Singh AK, Goswami J, Sejian V. Comparative assessment of native, crossbred and exotic pigs during different seasons (winter, spring and summer) based on rhythmic changes in the levels of serum cortisol, lactate dehydrogenase levels and PBMC HSP70 mRNA expression pattern. BIOL RHYTHM RES 2018. [DOI: 10.1080/09291016.2017.1410019] [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: 10/18/2022]
Affiliation(s)
- Y. Vashi
- ICAR-National Research Centre on Pig, Guwahati, India
- Department of Biotechnology, Assam Don Bosco University, Sonapur, India
| | - S. Naskar
- ICAR-National Research Centre on Pig, Guwahati, India
- ICAR-Indian Institute of Agricultural Biotechnology, Ranchi, India
| | - T. Chutia
- ICAR-National Research Centre on Pig, Guwahati, India
| | - S. Banik
- ICAR-National Research Centre on Pig, Guwahati, India
| | - A. K. Singh
- ICAR-National Research Centre on Pig, Guwahati, India
| | - J. Goswami
- College of Veterinary Science, Assam Agricultural University, Guwahati, India
| | - V. Sejian
- ICAR-National Institute of Animal Nutrition and Physiology, Bengaluru, India
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Singh AK, Naskar S, Saikia B, Vashi Y, Gupta S, Banik S, Tamuli MK, Pande V, Sarma DK, Dhara SK. Effect of testicular tissue lysate on developmental competence of porcine oocytes matured and fertilized in vitro. Reprod Domest Anim 2016; 52:183-188. [PMID: 27862454 DOI: 10.1111/rda.12875] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2016] [Accepted: 09/21/2016] [Indexed: 11/29/2022]
Abstract
The objective of the present study was to investigate the effect of testicular tissue lysate (TTL) on developmental competence of germinal vesicle (GV) stage porcine oocytes. Two types of TTL were prepared through repeated freeze-thaw in liquid nitrogen, one from whole testicular tissue (wTTL) and other from either of four different sections of testes, namely just beneath the tunica albuginea (TA), from the transitional area between the seminiferous cord/tubules and the mediastinum testis (TR) and from the intermediate area (parenchymal tissue origin) and CE (cauda epididymis origin). The whole or section-wise TTL treatments were given for 44 hr during in vitro maturation (IVM). Oocyte maturation was done in either of the two media, namely defined (high-performance basic medium for porcine oocyte maturation, commercially available) and serum containing (TCM199). After maturation, oocytes were co-incubated with fresh spermatozoa for 6 hr and then transferred to embryo culture media. Treatment of GV stage oocytes with wTTL (1 mg/ml) increased the cleavage and morula percentage rate (69.23 ± 6.23 and 48.15 ± 6.77, respectively) than that of their control (58.33 ± 8.08 and 32.54 ± 5.53, respectively) in defined media, and in serum-containing media, cleavage and morula percentage rate were almost equal in both treatment (54.56 ± 7.79 and 34.70 ± 6.78, respectively) and control (59.52 ± 8.21 and 38.52 ± 6.54, respectively). However, effect of wTTL was not significant. In case of section-wise TTL supplements, TR section significantly (p < .01) improved cleavage and morula rate (58.43 ± 7.98 and 36.14 ± 6.89, respectively) followed by TA. In conclusion, present study indicates that IVM, in vitro fertilization and in vitro culture of embryo are improved in the presence of TTL, particularly its TR section. Further study is expected to reveal the principal components of TTL which may prove useful for IVM.
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Affiliation(s)
- A K Singh
- ICAR-Indian Veterinary Research Institute, Bareilly, Uttar Pradesh, India.,Department of Biotechnology, Kumaun University, Nainital, Uttarakhand, India
| | - S Naskar
- ICAR-National Research Centre on Pig, Guwahati, Assam, India.,ICAR-Indian Institute of Agricultural Biotechnology, Ranchi, Jharkhand, India
| | - B Saikia
- ICAR-National Research Centre on Pig, Guwahati, Assam, India
| | - Y Vashi
- ICAR-National Research Centre on Pig, Guwahati, Assam, India
| | - S Gupta
- ICAR-Indian Veterinary Research Institute, Bareilly, Uttar Pradesh, India
| | - S Banik
- ICAR-National Research Centre on Pig, Guwahati, Assam, India
| | - M K Tamuli
- ICAR-National Research Centre on Pig, Guwahati, Assam, India
| | - V Pande
- Department of Biotechnology, Kumaun University, Nainital, Uttarakhand, India
| | - D K Sarma
- ICAR-National Research Centre on Pig, Guwahati, Assam, India
| | - S K Dhara
- ICAR-Indian Veterinary Research Institute, Bareilly, Uttar Pradesh, India
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Korneev SA, Maconochie M, Naskar S, Korneeva EI, Richardson GP, O'Shea M. A novel long non-coding natural antisense RNA is a negative regulator of Nos1 gene expression. Sci Rep 2015; 5:11815. [PMID: 26154151 PMCID: PMC4495418 DOI: 10.1038/srep11815] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2015] [Accepted: 05/19/2015] [Indexed: 11/09/2022] Open
Abstract
Long non-coding natural antisense transcripts (NATs) are widespread in eukaryotic species. Although recent studies indicate that long NATs are engaged in the regulation of gene expression, the precise functional roles of the vast majority of them are unknown. Here we report that a long NAT (Mm-antiNos1 RNA) complementary to mRNA encoding the neuronal isoform of nitric oxide synthase (Nos1) is expressed in the mouse brain and is transcribed from the non-template strand of the Nos1 locus. Nos1 produces nitric oxide (NO), a major signaling molecule in the CNS implicated in many important functions including neuronal differentiation and memory formation. We show that the newly discovered NAT negatively regulates Nos1 gene expression. Moreover, our quantitative studies of the temporal expression profiles of Mm-antiNos1 RNA in the mouse brain during embryonic development and postnatal life indicate that it may be involved in the regulation of NO-dependent neurogenesis.
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Affiliation(s)
- Sergei A Korneev
- Sussex Neuroscience, School of Life Science, University of Sussex, Brighton BN1 9QG, UK
| | - Mark Maconochie
- School of Biological and Chemical Sciences, Queen Mary University of London, London E1 4NS, UK
| | - Souvik Naskar
- Sussex Neuroscience, School of Life Science, University of Sussex, Brighton BN1 9QG, UK
| | - Elena I Korneeva
- Sussex Neuroscience, School of Life Science, University of Sussex, Brighton BN1 9QG, UK
| | - Guy P Richardson
- Sussex Neuroscience, School of Life Science, University of Sussex, Brighton BN1 9QG, UK
| | - Michael O'Shea
- Sussex Neuroscience, School of Life Science, University of Sussex, Brighton BN1 9QG, UK
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18
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Paul A, Dangi S, Gupta M, Singh J, Thakur N, Naskar S, Nanda P, Mohanty N, Das A, Bandopadhayay S, Das B, Sarkar M. Expression of TLR genes in Black Bengal goat (Capra hircus) during different seasons. Small Rumin Res 2015. [DOI: 10.1016/j.smallrumres.2015.01.011] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [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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20
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Naskar S, Borah S, Vashi Y, Thomas R, Dhara S, Banik S. Evaluation of pig rearing farmers of North East India as prospective breeder: A retrospective analysis. INDIAN J ANIM RES 2015. [DOI: 10.5958/0976-0555.2015.00025.4] [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: 10/24/2022]
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21
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Jana TK, Naskar S, Paul S, Sarkar B, Saha J. Handling machine breakdown for dynamic scheduling by a colony of cognitive agents in a holonic manufacturing framework. 10 5267/j dsl 2015. [DOI: 10.5267/j.dsl.2015.5.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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22
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Pirger Z, Crossley M, László Z, Naskar S, Kemenes G, O’Shea M, Benjamin P, Kemenes I. Interneuronal Mechanism for Tinbergen's Hierarchical Model of Behavioral Choice. Curr Biol 2014; 24:2215. [PMID: 28903055 PMCID: PMC5629021 DOI: 10.1016/j.cub.2014.09.024] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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23
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Pirger Z, Crossley M, László Z, Naskar S, Kemenes G, O'Shea M, Benjamin PR, Kemenes I. Interneuronal mechanism for Tinbergen's hierarchical model of behavioral choice. Curr Biol 2014; 24:2018-24. [PMID: 25155505 PMCID: PMC4159561 DOI: 10.1016/j.cub.2014.07.044] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2014] [Revised: 06/24/2014] [Accepted: 07/16/2014] [Indexed: 11/08/2022]
Abstract
Recent studies of behavioral choice support the notion that the decision to carry out one behavior rather than another depends on the reconfiguration of shared interneuronal networks [1]. We investigated another decision-making strategy, derived from the classical ethological literature [2, 3], which proposes that behavioral choice depends on competition between autonomous networks. According to this model, behavioral choice depends on inhibitory interactions between incompatible hierarchically organized behaviors. We provide evidence for this by investigating the interneuronal mechanisms mediating behavioral choice between two autonomous circuits that underlie whole-body withdrawal [4, 5] and feeding [6] in the pond snail Lymnaea. Whole-body withdrawal is a defensive reflex that is initiated by tactile contact with predators. As predicted by the hierarchical model, tactile stimuli that evoke whole-body withdrawal responses also inhibit ongoing feeding in the presence of feeding stimuli. By recording neurons from the feeding and withdrawal networks, we found no direct synaptic connections between the interneuronal and motoneuronal elements that generate the two behaviors. Instead, we discovered that behavioral choice depends on the interaction between two unique types of interneurons with asymmetrical synaptic connectivity that allows withdrawal to override feeding. One type of interneuron, the Pleuro-Buccal (PlB), is an extrinsic modulatory neuron of the feeding network that completely inhibits feeding when excited by touch-induced monosynaptic input from the second type of interneuron, Pedal-Dorsal12 (PeD12). PeD12 plays a critical role in behavioral choice by providing a synaptic pathway joining the two behavioral networks that underlies the competitive dominance of whole-body withdrawal over feeding. Behavioral choice between mutually exclusive behaviors is hierarchically organized Touch-induced whole-body withdrawal inhibits sucrose-driven feeding rhythms Two interneurons with asymmetrical connectivity allow withdrawal to override feeding Suppression of feeding is due to the enhancement of tonic inhibition
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Affiliation(s)
- Zsolt Pirger
- Sussex Neuroscience, School of Life Sciences, University of Sussex, Brighton BN1 9QG, UK
| | - Michael Crossley
- Sussex Neuroscience, School of Life Sciences, University of Sussex, Brighton BN1 9QG, UK
| | - Zita László
- Sussex Neuroscience, School of Life Sciences, University of Sussex, Brighton BN1 9QG, UK
| | - Souvik Naskar
- Sussex Neuroscience, School of Life Sciences, University of Sussex, Brighton BN1 9QG, UK
| | - György Kemenes
- Sussex Neuroscience, School of Life Sciences, University of Sussex, Brighton BN1 9QG, UK
| | - Michael O'Shea
- Sussex Neuroscience, School of Life Sciences, University of Sussex, Brighton BN1 9QG, UK
| | - Paul R Benjamin
- Sussex Neuroscience, School of Life Sciences, University of Sussex, Brighton BN1 9QG, UK
| | - Ildikó Kemenes
- Sussex Neuroscience, School of Life Sciences, University of Sussex, Brighton BN1 9QG, UK.
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Naskar S, Wan H, Kemenes G. pT305-CaMKII stabilizes a learning-induced increase in AMPA receptors for ongoing memory consolidation after classical conditioning. Nat Commun 2014; 5:3967. [PMID: 24875483 PMCID: PMC4048835 DOI: 10.1038/ncomms4967] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2013] [Accepted: 04/25/2014] [Indexed: 12/02/2022] Open
Abstract
The role of CaMKII in learning-induced activation and trafficking of AMPA receptors (AMPARs) is well established. However, the link between the phosphorylation state of CaMKII and the agonist-triggered proteasomal degradation of AMPARs during memory consolidation remains unknown. Here we describe a novel CaMKII-dependent mechanism by which a learning-induced increase in AMPAR levels is stabilized for consolidation of associative long-term memory. Six hours after classical conditioning the levels of both autophosphorylated pT305-CaMKII and GluA1 type AMPAR subunits are significantly elevated in the ganglia containing the learning circuits of the snail Lymnaea stagnalis. CaMKIINtide treatment significantly reduces the learning-induced elevation of both pT305-CaMKII and GluA1 levels and impairs associative long-term memory. Inhibition of proteasomal activity offsets the deleterious effects of CaMKIINtide on both GluA1 levels and long-term memory. These findings suggest that increased levels of pT305-CaMKII play a role in AMPAR dependent memory consolidation by reducing proteasomal degradation of GluA1 receptor subunits.
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Affiliation(s)
- Souvik Naskar
- Sussex Neuroscience, School of Life Sciences, University of Sussex, Brighton, BN1 9QG, UK
| | - Huimin Wan
- Sussex Neuroscience, School of Life Sciences, University of Sussex, Brighton, BN1 9QG, UK
| | - György Kemenes
- Sussex Neuroscience, School of Life Sciences, University of Sussex, Brighton, BN1 9QG, UK
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Pirger Z, Naskar S, László Z, Kemenes G, Reglődi D, Kemenes I. Reversal of age-related learning deficiency by the vertebrate PACAP and IGF-1 in a novel invertebrate model of aging: the pond snail (Lymnaea stagnalis). J Gerontol A Biol Sci Med Sci 2014; 69:1331-8. [PMID: 24846768 PMCID: PMC4197904 DOI: 10.1093/gerona/glu068] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [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] [Indexed: 12/16/2022] Open
Abstract
With the increase of life span, nonpathological age-related memory decline is affecting an increasing number of people. However, there is evidence that age-associated memory impairment only suspends, rather than irreversibly extinguishes, the intrinsic capacity of the aging nervous system for plasticity (1). Here, using a molluscan model system, we show that the age-related decline in memory performance can be reversed by administration of the pituitary adenylate cyclase activating polypeptide (PACAP). Our earlier findings showed that a homolog of the vertebrate PACAP38 and its receptors exist in the pond snail (Lymnaea stagnalis) brain (2), and it is both necessary and instructive for memory formation after reward conditioning in young animals (3). Here we show that exogenous PACAP38 boosts memory formation in aged Lymnaea, where endogenous PACAP38 levels are low in the brain. Treatment with insulin-like growth factor-1, which in vertebrates was shown to transactivate PACAP type I (PAC1) receptors (4) also boosts memory formation in aged pond snails. Due to the evolutionarily conserved nature of these polypeptides and their established role in memory and synaptic plasticity, there is a very high probability that they could also act as “memory rejuvenating” agents in humans.
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Affiliation(s)
- Zsolt Pirger
- Balaton Limnological Institute, Centre for Ecological Research, Hungarian Academy of Sciences, Tihany, Hungary. Sussex Neuroscience, School of Life Sciences, University of Sussex, Brighton. Department of Anatomy MTA-PTE, "Momentum" PACAP Team, University of Pécs, Hungary
| | - Souvik Naskar
- Sussex Neuroscience, School of Life Sciences, University of Sussex, Brighton
| | - Zita László
- Balaton Limnological Institute, Centre for Ecological Research, Hungarian Academy of Sciences, Tihany, Hungary. Sussex Neuroscience, School of Life Sciences, University of Sussex, Brighton
| | - György Kemenes
- Sussex Neuroscience, School of Life Sciences, University of Sussex, Brighton
| | - Dóra Reglődi
- Department of Anatomy MTA-PTE, "Momentum" PACAP Team, University of Pécs, Hungary
| | - Ildikó Kemenes
- Sussex Neuroscience, School of Life Sciences, University of Sussex, Brighton.
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26
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Nayak MK, Agrawal AS, Bose S, Naskar S, Bhowmick R, Chakrabarti S, Sarkar S, Chawla-Sarkar M. Antiviral activity of baicalin against influenza virus H1N1-pdm09 is due to modulation of NS1-mediated cellular innate immune responses. J Antimicrob Chemother 2014; 69:1298-310. [DOI: 10.1093/jac/dkt534] [Citation(s) in RCA: 76] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
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27
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Chowdhury P, Hari R, Chakraborty B, Mandal B, Naskar S, Das N. Isolation, culture optimization and physico-chemical characterization of laccase enzyme from Pleurotus fossulatus. Pak J Biol Sci 2014; 17:173-181. [PMID: 24783799 DOI: 10.3923/pjbs.2014.173.181] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Pleurotus fossulatus (Cooke) Sace is member of oyster mushroom can produced extracellular laccase (benzenediol: oxygen oxidoreductase; EC 1.10.3.2) in submerged fermentation. To analyze the optimum production for laccase P. fossulatus was cultured both in stationary and shaking condition in different media. Partial purification of laccase was done after 0-80% ammonium sulphate precipitation, followed by DEAE (Diethylaminoethyl) Sephadex (A-50) anion exchange chromatography. Potato-sucrose peptone (PSP) medium and Potato-dextrose (PD) medium showed highest laccase production in shaking and stationary conditions, respectively. Though the time required for optimum laccase production in stationary condition was much more than the shaking condition but the amount of laccase was about 2.75t greater in former condition. The laccase produced in stationary condition was more stable than the enzyme produced in shaking condition. The partially purified enzyme showed highest affinity towards o-dianisidine than guaiacol and ABTS (2,2'-Azino-bis (3-ethylbenzothiazoline-6-sulfonic acid) as evidenced by their K(m). The physico-chemical properties of the laccase suggested the significance of this enzyme in industrial applications.
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Borah S, Sarmah B, Chakravarty P, Naskar S, Dutta D, Kalita D. Effect of zinc supplementation on serum biochemicals in grower pig. Journal of Applied Animal Research 2013. [DOI: 10.1080/09712119.2013.824888] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Mitra A, Basak T, Datta K, Naskar S, Sengupta S, Sarkar S. Role of α-crystallin B as a regulatory switch in modulating cardiomyocyte apoptosis by mitochondria or endoplasmic reticulum during cardiac hypertrophy and myocardial infarction. Cell Death Dis 2013; 4:e582. [PMID: 23559016 PMCID: PMC3641337 DOI: 10.1038/cddis.2013.114] [Citation(s) in RCA: 90] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Cardiac hypertrophy and myocardial infarction (MI) are two major causes of heart failure with different etiologies. However, the molecular mechanisms associated with these two diseases are not yet fully understood. So, this study was designed to decipher the process of cardiomyocyte apoptosis during cardiac hypertrophy and MI in vivo. Our study revealed that mitochondrial outer membrane channel protein voltage-dependent anion channel-1 (VDAC1) was upregulated exclusively during cardiac hypertrophy, whereas 78 kDa glucose-regulated protein (GRP78) was exclusively upregulated during MI, which is an important upstream regulator of the endoplasmic reticulum (ER) stress pathway. Further downstream analysis revealed that mitochondrial pathway of apoptosis is instrumental in case of hypertrophy, whereas ER stress-induced apoptosis is predominant during MI, which was confirmed by treatment with either siRNA against VDAC1 or ER stress inhibitor tauroursodeoxycholic acid (TUDCA). Very interestingly, our data also showed that the expression and interaction of small heat-shock protein α-crystallin B (CRYAB) with VDAC1 was much more pronounced during MI compared with either hypertrophy or control. The study demonstrated for the first time that two different organelles—mitochondria and ER have predominant roles in mediating cardiomyocyte death signaling during hypertrophy and MI, respectively, and activation of CRYAB acts as a molecular switch in bypassing mitochondrial pathway of apoptosis during MI.
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Affiliation(s)
- A Mitra
- Department of Zoology, University of Calcutta, 35, B.C. Road, Kolkata 700 019, India
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Das M, Laha R, Devi P, Bordoloi RK, Naskar S. Sarcoptic mange infestation in pigs in a hilly region of Meghalaya. Trop Anim Health Prod 2009; 42:1009-11. [PMID: 20041347 DOI: 10.1007/s11250-009-9523-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/09/2009] [Indexed: 11/29/2022]
Abstract
Skin lesions were collected from 15 adult crossbred pigs maintained at the pig farm of ICAR Research Complex for the North-Eastern Hill Region, Umiam, a hilly region of the state of Meghalaya, India. Skin scrapings of these 15 animals were examined by KOH digestion method. Presence of mites were detected in five animals which were indistinguishable from Sarcoptes scabiei var. suis. Infected pigs were treated with a single dose of Ivermectin at 200 ug/kg body weight, subcutaneously. No mites were recovered from treated pigs after a period of 10 days of post-treatment. The presence of S. scabiei var. suis in pigs from this part of the country has never been reported. This infestation has great significance because it affects the growth rate and feed conversion significantly, specially to the grower and weaned pigs. It can be concluded that S. scabiei var. suis infestation is prevalent in hilly region of Meghalaya. The pig producers are generally unaware about the severity of the problem of mite infestation, so precaution should be taken to prevent their valuable pigs from S. scabiei var. suis infestation.
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Affiliation(s)
- M Das
- Division of Veterinary Parasitology, ICAR Research Complex for NEH Region, Umroi Road, Umiam, Meghalaya, 793 103, India
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Kumaresan A, Kadirvel G, Bujarbaruah K, Bardoloi R, Das A, Kumar S, Naskar S. Preservation of boar semen at 18°C induces lipid peroxidation and apoptosis like changes in spermatozoa. Anim Reprod Sci 2009; 110:162-71. [DOI: 10.1016/j.anireprosci.2008.01.006] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2007] [Revised: 01/10/2008] [Accepted: 01/13/2008] [Indexed: 11/30/2022]
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Hering J, Rottmann M, Hempel F, Naskar S, Angelkort B. Langzeitergebnisse nach primär erfolgreicher transluminaler percutaner Angioplastie (PTA) von Unterschenkelarterien beim diabetischen Fußsyndrom. DIABETOL STOFFWECHS 2006. [DOI: 10.1055/s-2006-943918] [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: 10/19/2022]
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Naskar S, Biswas S, Mishra D, Adhikary B, Falvello L, Soler T, Schwalbe C, Chattopadhyay S. Studies on the relative stabilities of Mn(II) and Mn(III) in complexes with N4O2 donor environments: crystal structures of [Mn(pybzhz)2] and [Mn(Ophsal)(imzH)2] ClO4 (pybzhz=N-(benzoyl)-N′-(picolinylidene) hydrazine, Ophsal=N,N′-o-phenylenebis(salicylideneimine), imzH=imidazole). Inorganica Chim Acta 2004. [DOI: 10.1016/j.ica.2004.06.018] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.2] [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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35
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Naskar S, Nanda DK. Cytomorphology of the ring gland and its relation with the stomatogastric nervous system in adult fly, Chrysomyia megacephala (Diptera: Calliphoridae). CYTOLOGIA 1975; 40:277-84. [PMID: 1157524 DOI: 10.1508/cytologia.40.277] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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