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Sheik S, Sheik S. Fungal Mediated Effective Exploitation of Uncongenial Wastes from Environment. Fungal Biol 2022. [DOI: 10.1007/978-981-16-8877-5_18] [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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Kuthyala S, Nagaraja GK, Sheik S, Hanumanthappa M, Kumar S M. Synthesis of imidazo [1, 2-a]pyridine-chalcones as potent inhibitors against A549 cell line and their crystal studies. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2018.09.087] [Citation(s) in RCA: 10] [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: 01/31/2023]
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Sheik S, Sheik S, Nairy R, Nagaraja GK, Prabhu A, Rekha PD, Prashantha K. Study on the morphological and biocompatible properties of chitosan grafted silk fibre reinforced PVA films for tissue engineering applications. Int J Biol Macromol 2018; 116:45-53. [PMID: 29733927 DOI: 10.1016/j.ijbiomac.2018.05.019] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2017] [Revised: 05/03/2018] [Accepted: 05/03/2018] [Indexed: 11/25/2022]
Abstract
The current study delineates the preparation of novel chitosan grafted silk fibre reinforced Poly (vinyl alcohol) (PVA) composite films with desirable properties. Although silk fibroin has been extensively used for various biomedical applications, its properties could be further re-tailored for its suitability in the field of regenerative medicine. Chitosan was successfully grafted over silk, via acylation with succinic anhydride and thereby the fibres were incised and used for the preparation of the films. The grafted silk fibre reinforced PVA films were subjected to FTIR studies, microscopic analysis by atomic force microscopy (AFM) and optical microscopy techniques, X-ray diffraction (XRD) analysis and further evaluated for in vitro biocompatibility studies. The composite films demonstrated improved surface roughness with increasing concentration of the fibre and its dispersion in the polymer matrix was observed. Furthermore, in vitro biocompatibility and cellular behaviour such as adhesion and proliferation of mouse fibroblasts as well as astrocyte cells was studied and the results showed improved proliferative activity, when compared to the pristine PVA films. These results were further supported by the results confirmed by MTT assay demonstrating the films to be non-toxic. The efficiency and feasibility of the films to be used for tissue engineering, was further evaluated by haemocompatibility studies using human erythrocytes, thus making them a potential material to be used for biomedical applications.
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Affiliation(s)
- Sareen Sheik
- Department of Post-Graduate Studies & Research in Chemistry, Mangalore University, Mangalagangothri, 574199, (D.K.), Karnataka, India
| | - Sana Sheik
- Department of Applied Botany, Mangalore University, Mangalagangothri, 574199, (D.K.), Karnataka, India
| | - Rajesha Nairy
- Department of Physics, P.A. College of Engineering, Mangalore, 574153, (D.K.), Karnataka, India
| | - G K Nagaraja
- Department of Post-Graduate Studies & Research in Chemistry, Mangalore University, Mangalagangothri, 574199, (D.K.), Karnataka, India.
| | - Ashwini Prabhu
- Yenepoya Research Centre, Yenepoya University, University Road Deralakatte, Mangalore, 575018, (D.K.), Karnataka, India
| | - P D Rekha
- Yenepoya Research Centre, Yenepoya University, University Road Deralakatte, Mangalore, 575018, (D.K.), Karnataka, India
| | - Kalappa Prashantha
- IMT Lille Douai, Institut Mines-Télécom, Polymers and Composites Technology & Mechanical Engineering Department, 941 rue Charles Bourseul, 59508 Douai, France; Université de Lille, 59000 Lille, France
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Sheik S, Chandrashekar KR. Fungal endophytes of an endemic plant Humboldtia brunonis wall. of western Ghats (India) and their antimicrobial and DPPH radical scavenging potentiality. ACTA ACUST UNITED AC 2018. [DOI: 10.1007/s13596-018-0297-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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S. Nayak P, Narayana B, Fernandes J, K. Sarojini B, Sheik S, S. Shashidhara K, R. Chandrashekhar K, Byrappa K. Synthesis & Characterization of 2-(substituted-phenyl)acetohydrazide Analogs, 1,3,4-oxadiazoles, and 1,2,4-triazine Ring Systems: A Novel Class of Potential Analgesic and Anti-Inflammatory Agents. LETT DRUG DES DISCOV 2016. [DOI: 10.2174/1570180812666151003001957] [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: 11/22/2022]
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Mill R, Sheik S, Indiveri G, Denham SL. A Model of Stimulus-Specific Adaptation in Neuromorphic Analog VLSI. IEEE Trans Biomed Circuits Syst 2011; 5:413-419. [PMID: 23852174 DOI: 10.1109/tbcas.2011.2163155] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Stimulus-specific adaptation (SSA) is a phenomenon observed in neural systems which occurs when the spike count elicited in a single neuron decreases with repetitions of the same stimulus, and recovers when a different stimulus is presented. SSA therefore effectively highlights rare events in stimulus sequences, and suppresses responses to repetitive ones. In this paper we present a model of SSA based on synaptic depression and describe its implementation in neuromorphic analog very-large-scale integration (VLSI). The hardware system is evaluated using biologically realistic spike trains with parameters chosen to reflect those of the stimuli used in physiological experiments. We examine the effect of input parameters and stimulus history upon SSA and show that the trends apparent in the results obtained in silico compare favorably with those observed in biological neurons.
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Thayyil S, Sheik S, Kempley ST, Sinha A. A gestation- and postnatal age-based reference chart for assessing renal function in extremely premature infants. J Perinatol 2008; 28:226-9. [PMID: 18288122 DOI: 10.1038/sj.jp.7211905] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
OBJECTIVE A single value of plasma creatinine cannot be used to define renal dysfunction in premature babies, as levels are influenced by gestation and postnatal age. The aim of this study was to create reference ranges for plasma creatinine in cohort of extremely premature infants. STUDY DESIGN Retrospective analysis of plasma creatinine levels in the first 8 weeks of life from 161 consecutively admitted premature infants 28 weeks gestation. RESULT Babies were divided into three groups according to gestation. Peak (10th, 90th percentiles) creatinine levels were 132 (106,162) in 22 to 24 weeks gestational infants, 127 (89,151) in those from 25 to 26 weeks and 110 (87,134) in those from 27 to 28 weeks (P<0.001). Creatinine at birth was similar across the groups with levels increasing during the first few days. It decreases thereafter before reaching stable levels by 5 weeks of age. CONCLUSION Gestation- and age-based reference charts should be used for interpretation of creatinine values in extremely premature babies.
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Affiliation(s)
- S Thayyil
- Department of Cardiovascular Imaging, Great Ormond Street Hospital, UCL Institute of Child health, London, UK.
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