72 results on '"Muthusamy G"'
Search Results
2. The influence of e-service quality towards post-purchase intention on shopee
- Author
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Bahtar, A. Z., primary, Daud, S., additional, Yazid, Z. A., additional, Fazli, M. A. M., additional, Muthusamy, G., additional, Kamis, R., additional, Harun, H., additional, and Awang, A. H., additional
- Published
- 2024
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3. Effect of Cooling Rate During Solidification of Aluminum–Chromium Alloy
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Muthusamy, G., primary, Wagstaff, S., additional, and Allanore, A., additional
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- 2020
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4. Wider Row Spacing in Sugarcane: A Socio-economic Performance Analysis
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Rajula Shanthy, T. and Muthusamy, G. R.
- Published
- 2012
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5. Detection of Hepatozoan canis in Dogs from Namakkal Region of Tamilnadu by Conventional and Molecular Approach
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Kalaivanan Murugesan Saravanan Subramanian and Palanivel Kondan Muthusamy G. Ponnudurai
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0301 basic medicine ,03 medical and health sciences ,Veterinary medicine ,0302 clinical medicine ,Canis ,biology ,030231 tropical medicine ,030108 mycology & parasitology ,biology.organism_classification - Published
- 2017
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6. Impact of Surface Charge-Tailored Gold Nanorods for Selective Targeting of Mitochondria in Breast Cancer Cells Using Photodynamic Therapy
- Author
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Nadar Manimaran Vinita, Umapathy Devan, Sabapathi Durgadevi, Selvaraj Anitha, Muthusamy Govarthanan, Arockiam Antony Joseph Velanganni, Jeyaraman Jeyakanthan, Pitchan Arul Prakash, Mohamed Sultan Mohamed Jaabir, and Ponnuchamy Kumar
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Chemistry ,QD1-999 - Published
- 2023
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7. Triphenylphosphonium conjugated gold nanotriangles impact Pi3K/AKT pathway in breast cancer cells: a photodynamic therapy approach
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Nadar Manimaran Vinita, Umapathy Devan, Sabapathi Durgadevi, Selvaraj Anitha, Dhamodharan Prabhu, Sundarraj Rajamanikandan, Muthusamy Govarthanan, Ananthanarayanan Yuvaraj, Muniyandi Biruntha, Arockiam Antony Joseph Velanganni, Jeyaraman Jeyakanthan, Pitchan Arul Prakash, Mohamed Sultan Mohamed Jaabir, and Ponnuchamy Kumar
- Subjects
Medicine ,Science - Abstract
Abstract Although gold nanoparticles based photodynamic therapy (PDT) were reported to improve efficacy and specificity, the impact of surface charge in targeting cancer is still a challenge. Herein, we report gold nanotriangles (AuNTs) tuned with anionic and cationic surface charge conjugating triphenylphosphonium (TPP) targeting breast cancer cells with 5-aminoleuvinic acid (5-ALA) based PDT, in vitro. Optimized surface charge of AuNTs with and without TPP kill breast cancer cells. By combining, 5-ALA and PDT, the surface charge augmented AuNTs deliver improved cellular toxicity as revealed by MTT, fluorescent probes and flow cytometry. Further, the 5-ALA and PDT treatment in the presence of AuNTs impairs cell survival Pi3K/AKT signaling pathway causing mitochondrial dependent apoptosis. The cumulative findings demonstrate that, cationic AuNTs with TPP excel selective targeting of breast cancer cells in the presence of 5-ALA and PDT.
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- 2023
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8. Synthesis of conformationally constrained alpha-amino acid derivatives containing bicyclo[2.2.2] unit via the Diels-Alder and Suzuki-Miyaura cross-coupling reactions as key steps
- Author
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KOTHA, S, MESHRAM, M, and MUTHUSAMY, G
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Diversity ,Bromination ,Anthracene Derivatives ,Palladium Catalysts ,Metathesis ,Halides ,Bicyclic Alpha-Amino Acid Derivatives ,9-Substituted Anthracenes ,2-Acetamidoacrylate ,Glycine Equivalent ,Buchwald Ligand ,Tribromide ,Diels-Alder Reaction ,Suzuki-Miyaura Cross-Coupling Reaction ,Peptides - Abstract
A simple route to synthesize conformationally constrained a-amino acid (AAA) derivatives containing bicyclo[2.2.2]octane ring-system has been devised. Diels-Alder reaction is chosen to assemble highly constrained AAA derivatives and the scope of the methodology is further expanded by Suzuki-Miyaura cross-coupling reaction with various boronic acids.
- Published
- 2015
9. Organizational intention to use forensic accounting services for fraud detection and prevention by large Malaysian companies
- Author
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Atul Gupta, Muthusamy, G., Quaddus, Mohammed, Evans, Robert, Atul Gupta, Muthusamy, G., Quaddus, Mohammed, and Evans, Robert
- Published
- 2010
10. Thiosemicarbazone Complexes of Ruthenium(II) and Rhodium(I) Containing Triphenylphosphine
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Muthusamy, G., primary, Viswanathamurthi, P., additional, Muthukumar, M., additional, and Natarajan, K., additional
- Published
- 2009
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11. β-Diketonate and α,β-Unsaturated-β-ketoaminate Complexes of Ruthenium(II) Containing Carbonyl, Thiocarbonyl and Pyridine Ligands
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Muthusamy, G., primary, Ramesh, R., additional, and Natarajan, K., additional
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- 1994
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12. bis-β-Diketonate Bridged Binuclear Complexes of Ruthenium (II) and Rhodium (I) Containing Triphenylphosphine
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Muthusamy, G., primary, Jayakumar, N., additional, Manonmani, B., additional, Shantha, R., additional, and Natarajan, K., additional
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- 1992
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13. Eco-friendly biosynthesis and characterization of silver nanoparticles using Tinospora cordifolia (Thunb.) Miers and evaluate its antibacterial, antioxidant potential
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Kandasamy Selvam, Chinnappan Sudhakar, Muthusamy Govarthanan, Periasamy Thiyagarajan, Arumugam Sengottaiyan, Balakrishnan Senthilkumar, and Thangasamy Selvankumar
- Subjects
Tinospora cordifolia ,Silver nanoparticles ,Response surface methodology ,Antioxidant ,Antibacterial activity ,Medical physics. Medical radiology. Nuclear medicine ,R895-920 ,Nuclear engineering. Atomic power ,TK9001-9401 - Abstract
The present study reports an eco-friendly, rapid and easy method for synthesis of silver nanoparticles (AgNPs) using Tinospora cordifolia as a reducing and capping agent. The different factor such as silver nitrate (AgNO3) concentration, fresh weight of T. cordifolia leaf, incubation time, and pH affecting silver reduction was investigated using Response surface methodology based Box–Behnken design (BBD). The optimum conditions were AgNO3 (1.25 mM), incubation time (15 h), Temperature (45 °C) and pH (4.5). T. cordifolia leaf extract can reduces silver ions into AgNPs within 30 min after heating the reaction mixture (60 °C) as indicated by the developed reddish brown color. The UV-Vis spectrum of AgNPs revealed a characteristic surface plasmon resonance (SPR) peak at 430 nm. AgNPs were characterized X-ray diffraction (XRD) revealed their crystalline nature and their average size of nanoparticles was 30 nm as determined by using Scherrer's equation. Fourier transform infrared (FTIR) spectroscopy affirmed the role of T. cordifolia leaf extract as a reducing and capping agent of silver ions. Scanning electron microscope-energy dispersive X-ray spectroscopy (SEM-EDS) showed spherical shaped and confirming presence of elemental silver. The synthesized AgNPs was found higher antioxidant activity than plant extract by dot plot assay. In addition, antibacterial activity against Staphylococcus sp. (NCBI-Accession: KC688883.1) and Klebsiella sp. (NCBI-Accession: KF649832.1), showed maximum zone of inhibition of 13 mm and 12.3 mm, respectively, at 10 μg/mL of AgNPs. From the results it is suggested that the synthesized AgNPs showed higher antioxidant and antibacterial activity than the plant extract, thus signification of the present study is the production of biomedical products.
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- 2017
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14. Acorus calamus rhizome extract mediated biosynthesis of silver nanoparticles and their bactericidal activity against human pathogens
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Chinnappan Sudhakar, Kandasamy Selvam, Muthusamy Govarthanan, Balakrishnan Senthilkumar, Arumugam Sengottaiyan, Murugesan Stalin, and Thangasamy Selvankumar
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Biosynthesis ,Silver nanoparticles ,Rhizome ,Response surface methodology ,Bactericidal activity ,Biotechnology ,TP248.13-248.65 ,Genetics ,QH426-470 - Abstract
Silver nanoparticle (AgNP) synthesis and characterization is an area of vast interest due to their broader application in the fields of science and technology and medicine. Plants are an attractive source for AgNP synthesis because of its ability to produce a wide range of secondary metabolites with strong reducing potentials. Thus, the present study describes the synthesis of AgNPs using aqueous rhizome extract of Acorus calamus (sweet flag). The AgNP formation was evaluated at different temperatures, incubation time and concentrations of AgNO3 using Response surface methodology based Box–Behnken design (BBD). The synthesized AgNPs were characterized by UV–Visible spectroscopy, Fourier transform infra-red spectroscopy (FTIR), X-ray diffraction (XRD), and Scanning electron microscopy–energy-dispersive spectroscopy (SEM–EDS). The surface plasmon resonance found at 420 nm confirmed the formation of AgNPs. SEM images reveal that the particles are spherical in nature. The EDS analysis of the AgNPs, using an energy range of 2–4 keV, confirmed the presence of elemental silver without any contamination. The antibacterial activity of synthesized AgNPs was evaluated against the clinical isolates Staphylococcus aureus and Escherichia coli and it was found that bacterial growth was significantly inhibited in a dose dependent manner. The results suggest that the AgNPs from rhizome extract could be used as a potential antibacterial agent for commercial application.
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- 2015
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15. A comparative study on bioactive constituents between wild and in vitro propagated Centella asiatica
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Muthusamy Govarthanan, Rathika Rajinikanth, Seralathan Kamala-Kannan, and Thangasamy Selvankumar
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Centella asiatica ,Callus ,Free radicals ,Medicinal plants ,Biotechnology ,TP248.13-248.65 ,Genetics ,QH426-470 - Abstract
Centella asiatica (Umbelliferae) has been used for centuries in Indian ayurvedic medicine for the treatment of a wide number of health disorders. The aim of this study was to estimate and compare the concentration of bioactive compounds between wild and in vitro propagated C. asiatica plants. A marked decrease in the total phenolic compounds, flavonoids, and ascorbic acid was observed between in vitro propagated and wild type plants collected from wet land habitat. The radical scavenging activity of the wild type plant extracts also varied with the habitats. This study clearly indicates that environmental factors play a crucial role in the plant metabolic activity and medicinal activity.
- Published
- 2015
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16. Identification of Potential Biomarkers and Spectral Fingerprinting for Detection of Foodborne Pathogens in Raw Chicken Meat Matrix Using GCMS and FTIR.
- Author
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Muthusamy G, Karthikeyan S, Arun Giridhari V, Alhimaidi AR, Balachandar D, Ammari AA, Paranidharan V, and Maruthamuthu T
- Abstract
Foodborne illnesses pose a serious threat to public health, with increasing global incidence rates driven by factors such as rising meat consumption. Rapid detection of foodborne pathogens in meat is critical for preventing outbreaks. This study investigates the potential of gas chromatography-mass spectrometry (GC-MS) and Fourier-transform infrared spectroscopy (FTIR) for identifying biomarkers and spectral fingerprints indicative of foodborne pathogens in raw chicken meat. Raw broiler chicken meat samples were surface-sterilized and inoculated with foodborne pathogens. The samples were challenge inoculated with the specific pathogen and the physical quality parameters like pH, color, texture, drip loss, and water activity were assessed. GC-MS analysis identified 113 metabolites, including potential biomarkers like ureidopropionic acid, 5-sulfosalicylic acid, 11,14-eicosadienoic acid, methyl ester for E . coli O157:H7; 11-bromoundecanoic acid, neocurdione, glafenin, eicosanoic acid for Salmonella ; azepan-1-yl-acetic acid, methyl ester, tramadol, cytarabine, dipipanone for Staphylococcus and cyclopentaneundecanoic acid, phosphonofluoridic acid, î-n-formyl-l-lysine for Pseudomonas . Pathway analysis revealed the involvement of fatty acid metabolism and amino acid degradation pathways. FTIR spectral data showed significant variances between control and spiked samples, particularly in the fatty acid spectral region. The identified metabolites and spectral patterns could serve as biomarkers for developing rapid pathogen detection methods, contributing to enhanced food safety protocols.
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- 2024
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17. Microalgae to bioenergy production: Recent advances, influencing parameters, utilization of wastewater - A critical review.
- Author
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Bora A, Thondi Rajan AS, Ponnuchamy K, Muthusamy G, and Alagarsamy A
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- Biomass, Microalgae growth & development, Biofuels, Wastewater, Waste Disposal, Fluid methods
- Abstract
Fossil fuel limitations and their influence on climate change through atmospheric greenhouse gas emissions have made the excessive use of fossil fuels widely recognized as unsustainable. The high lipid content, carbon-neutral nature and potential as a biofuel source have made microalgae a subject of global study. Microalgae are a promising supply of biomass for third-generation biofuels production since they are renewable. They have the potential to produce significant amounts of biofuel and are considered a sustainable alternative to non-renewable energy sources. Microalgae are currently incapable to synthesize algal biofuel on an extensive basis in a sustainable manner, despite their significance in the global production of biofuels. Wastewater contains nutrients (both organic and inorganic) which is essential for the development of microalgae. Microalgae and wastewater can be combined to remediate waste effectively. Wastewater of various kinds such as industrial, agricultural, domestic, and municipal can be used as a substrate for microalgal growth. This process helps reduce carbon dioxide emissions and makes the production of biofuels more cost-effective. This critical review provides a detailed analysis of the utilization of wastewater as a growth medium for microalgal - biofuel production. The review also highlights potential future strategies to improve the commercial production of biofuels from microalgae., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 Elsevier B.V. All rights reserved.)
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- 2024
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18. Tailoring CuO x loading on CoFe 2 O 4 nanocubes photocatalyst for superior photocatalytic degradation of triclosan pollutants under VL irradiation and toxicological evaluation.
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Subash V, Manikandan V, Soup Song K, Sethuraman V, Elango D, Muthusamy G, Kim W, and Jayanthi P
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- Animals, Catalysis, Ferric Compounds chemistry, Ferric Compounds toxicity, Light, Caenorhabditis elegans drug effects, Caenorhabditis elegans radiation effects, Photolysis, Water Pollutants, Chemical chemistry, Water Pollutants, Chemical toxicity, Triclosan chemistry, Triclosan toxicity, Copper chemistry, Cobalt chemistry
- Abstract
In this study, we report the development of a novel CuO
x (3 wt%)/CoFe2 O4 nanocubes (NCs) photocatalyst through simple co-precipitation and wet impregnation methods for the efficient photocatalytic degradation of triclosan (TCS) pollutants. Initially, rod-shaped bare CoFe2 O4 was synthesized using a simple co-precipitation technique. Subsequently, CuOx was loaded in various percentages (1, 2, and 3 wt%) onto the surface of bare CoFe2 O4 nanorods (NRs) via the wet impregnation method. The synthesized materials were systematically characterized to evaluate their composition, structural and electrical characteristics. The CuOx (3 wt%)/CoFe2 O4 NCs photocatalyst exhibited superior photocatalytic degradation efficiency of TCS (89.9%) compared to bare CoFe2 O4 NRs (62.1 %), CuOx (1 wt%)/CoFe2 O4 (80.1 %), CuOx (2 wt%)/CoFe2 O4 (87.0 %) under visible light (VL) irradiation (λ ≥ 420 nm), respectively. This enhanced performance was attributed to the improved separation effectiveness of photogenerated electron (e- ) and hole (h+ ) in CuOx (3 wt%)/CoFe2 O4 NCs. Furthermore, the optimized CuOx (3 wt%)/CoFe2 O4 NCs exhibited strong stability and reusability in TCS degradation, as demonstrated by three successive cycles. Genetic screening on Caenorhabditis elegans showed that CuOx (3 wt%)/CoFe2 O4 NCs reduced ROS-induced oxidative stress during TCS photocatalytic degradation. ROS levels decreased at 30, 60, and 120-min intervals during TCS degradation, accompanied by improved egg hatching rates. Additionally, expression levels of stress-responsible antioxidant proteins like SOD-3GFP and HSP-16.2GFP were significantly normalized. This study demonstrates the efficiency of CuOx (3 wt%)/CoFe2 O4 NCs in degrading TCS pollutants, offers insights into toxicity dynamics, and recommends its use for future environmental remediation., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 Elsevier Inc. All rights reserved.)- Published
- 2024
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19. Weathered polyethylene microplastics induced immunomodulation in zebrafish.
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Harikrishnan T, Paramasivam P, Sankar A, Sakthivel M, Sanniyasi E, Raman T, Thangavelu M, Singaram G, and Muthusamy G
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- Animals, Male, Female, Immunomodulation drug effects, Microplastics toxicity, Water Pollutants, Chemical toxicity, Polyethylene toxicity, Zebrafish immunology, Muramidase
- Abstract
Microplastics are pollutants of emerging concern and the aquatic biota consumes microplastics (MPs), which has a range of toxicological and environmental effects on aquatic organisms that are not the intended targets. The current study looked into how weathered polyethylene (wPE) MPs affected Danio albolineatus immunological and haematological markers. In this experiment, fish of both sexes were placed in control and exposure groups, and they were exposed for 40 d at the sublethal level (1 μg L
-1 ) of fragmented wPE, which contained 1074 ± 52 MPs per litre. Similarly, fish exposed to wPE MPs showed significant modifications in lysozyme, antimicrobial, and antiprotease activity, as well as differential counts. Results of the present study show that the male fish were more susceptible than female fish after 40 d of chronic exposure. Further studies are needed to ascertain how the innate and humoral immune systems of the fish respond to MPs exposure., Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 Elsevier B.V. All rights reserved.)- Published
- 2024
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20. Advancements in non-thermal technologies for enhanced extraction of functional triacylglycerols from microalgal biomass: A comprehensive review.
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Jadhav HB, Choudhary P, Deshmukh ND, Singh DK, Das M, Das A, Sai NCS, Muthusamy G, Annapure US, Ramniwas S, Mugabi R, and Nayik GA
- Abstract
Microalgae have emerged as a storehouse of biologically active components having numerous health benefits that can be used in the formulation of nutraceuticals, and functional foods, for human consumption. Among these biologically active components, functional triacylglycerols are increasingly attracting the attention of researchers owing to their beneficial characteristics. Microalgae are excellent sources of triacylglycerol containing omega-3 and omega-6 fatty acids and can be used by the vegan population as a replacement for fish oil. The functional triacylglycerols extracted using conventional processes have various drawbacks resulting in lower yield and inferior quality products. The non-thermal technologies are emerging as user-friendly and environment-friendly technologies that intensify the yield of final products and maintain the high purity of extracted products that can be used in food, cosmetic, pharmaceutical, and nutraceutical applications. The present review focuses on major non-thermal technologies that can probably be used for the extraction of high-quality functional triacylglycerols from microalgae., Competing Interests: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (© 2024 The Author(s).)
- Published
- 2024
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21. Neuroprotective effect of biogenically synthesized ZnO nanoparticles against oxidative stress and β-amyloid toxicity in transgenic Caenorhabditis elegans.
- Author
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Mani R, Ezhumalai D, Muthusamy G, and Namasivayam E
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- Animals, Amyloid beta-Peptides toxicity, Caenorhabditis elegans metabolism, Animals, Genetically Modified metabolism, Oxidative Stress, Antioxidants pharmacology, Zinc Oxide pharmacology, Neuroprotective Agents pharmacology, Alzheimer Disease drug therapy, Nanoparticles
- Abstract
Amyloid β (Aβ) plaque accumulation-mediated neuronal toxicity has been suggested to cause synaptic damage and consequent degeneration of brain cells in Alzheimer's disease (AD). With the increasing prerequisite of eco-friendly nanoparticles (NPs), research investigators are utilizing green approaches for the synthesis of zinc oxide (ZnO) NPs for pharmaceutical applications. In this present study, ZnO NPs were synthesized from Acanthus ilicifolius to assess the neuroprotective properties in the AD model of transgenic Caenorhabditis elegans strains CL2006 and CL4176 expressing Aβ aggregation. Our findings revealed that the therapeutic effect of green-synthesized ZnO NPs is associated with antioxidant activity. We also found that ZnO NPs significantly enhance the C. elegan's lifespan, locomotion, pharyngeal pumping, chemotaxis behavior also diminish the ROS deposition and intracellular productionMoreover, thioflavin T staining demonstrated that ZnO NPs substantially attenuated the Aβ deposition in the C. elegans strain as compared to untreated worms. With their antioxidant properties, the greenly synthesized ZnO NPs had a significant neuroprotective efficiency on Aβ-induced toxicity by reducing Aβ aggregation and specifically reducing the progression of paralysis in the C. elegans AD model. Our findings suggested that the biosynthesized ZnO NPs could be thought-provoking candidates for age-associated neurodegenerative disorders accompanied by oxidative stress., (© 2023 International Union of Biochemistry and Molecular Biology, Inc.)
- Published
- 2024
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22. Effect of microfibers induced toxicity in marine sedentary polychaete Hydroides elegans: Insight from embryogenesis axis.
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Harikrishnan T, Sivakumar P, Sivakumar S, Arumugam S, Raman T, Singaram G, Thangavelu M, Kim W, and Muthusamy G
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- Animals, Male, Humans, Ecosystem, Pandemics, Semen, Embryonic Development, Plastics, Metals, Heavy toxicity, Polychaeta
- Abstract
Presence of surgical face masks in the environment are more than ever before after the COVID-19 pandemic, and it poses a newer threat to aquatic habitats around the world due to microfibers (MFs) and other contaminants that get discharged when these masks deteriorate. The mechanism behind the developmental toxicity of MFs, especially released from surgical masks, on the early life stages of aquatic organisms are not well understood. Toxicity test were developed to examine the effects of MFs released from surgical facemask upon deterioration using the early gametes and early life stages of marine sedentary polychaete Hydroides elegans. For MFs release, cut pieces of face masks were allowed to degrade in seawater for different time points (1 day, 30 days and 120 days) after which the fibers were obtained for further toxicity studies. The gametes of H. elegans were exposed to the MFs (length < 20 μm) separately for 20 min at a concentration of 50 MFs/ml before fertilization. In addition, we also analyzed the experimental samples for heavy metals and organic substances released from face masks. Our findings demonstrated that gametes exposed to MFs affected the percentage of successful development, considerably slowed down the mitotic cell division and significantly postponed the time of larval hatching and also produced an adverse effect during embryogenesis. When the sperm were exposed fertilization rate was decreased drastically, whereas when the eggs were exposed to MFs fertilization was not inhibited but a delay in early embryonic development observed. In addition the release of heavy metals and other volatile organics from the degrading face masks could also contribute to overall toxicity of these materials in environment. Our study thus shows that inappropriately discarded face masks and MFs and other pollutants released from such face masks could pose long-term hazard to coastal ecosystems., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2023 Elsevier B.V. All rights reserved.)
- Published
- 2024
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23. Deletion of PGAM5 Downregulates FABP1 and Attenuates Long-Chain Fatty Acid Uptake in Hepatocellular Carcinoma.
- Author
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Muthusamy G, Liu CC, and Johnston AN
- Abstract
Phosphoglycerate mutase 5 (PGAM5) is a Ser/His/Thr phosphatase responsible for regulating mitochondrial homeostasis. Overexpression of PGAM5 is correlated with a poor prognosis in hepatocellular carcinoma, colon cancer, and melanoma. In hepatocellular carcinoma, silencing of PGAM5 reduces growth, which has been attributed to decreased mitophagy and enhanced apoptosis. Yet in colon cancer, PGAM5's pro-tumor survival effect is correlated to lipid metabolism. We sought to identify whether deletion of PGAM5 modulated lipid droplet accrual in hepatocellular carcinoma. HepG2 and Huh7 PGAM5 knockout cell lines generated using CRISPR/Cas9 technology were used to measure cell growth, cellular ATP, and long-chain fatty acid uptake. Expression of hepatocellular fatty acid transporters, cluster of differentiation 36 (CD36), solute carrier family 27 member 2 (SLC27A2), solute carrier family 27 member 5 (SLC27A5), and fatty acid binding protein 1 (FABP1) was measured by quantitative PCR and Western blot. We found that deletion of PGAM5 attenuates hepatocellular carcinoma cell growth and ATP production. Further, PGAM5 knockout ameliorates palmitate-induced steatosis and reduces expression of FABP1 in HepG2 and Huh7 cell lines. PGAM5's role in hepatocellular carcinoma includes regulation of fatty acid metabolism, which may be related to expression of the fatty acid transporter, FABP1., Competing Interests: The authors declare no conflicts of interest.
- Published
- 2023
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24. A novel encapsulation of 16 polycyclic aromatic hydrocarbons in petroleum sludge with palm oil fuel ash binder; an optimization study and sensitivity analysis using machine learning application.
- Author
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Roslee NF, Kamil NAFM, Alias S, Senthil Kumar P, Alkhadher S, Muthusamy G, and Al-Gheethi A
- Subjects
- Humans, Sewage chemistry, Palm Oil, Environmental Pollution, Petroleum, Polycyclic Aromatic Hydrocarbons analysis
- Abstract
Palm oil fuel ash (POFA) has limited use as a fertilizer, while contribute effectively to the environmental contamination and health risks. Petroleum sludge poses a serious effect on the ecological environment and human health. The present work aimed to present a novel encapsulation process with POFA binder for treating petroleum sludge. Among 16 polycyclic aromatic hydrocarbons, four compounds were selected for the optimization of encapsulation process due to their high risk as carcinogenic substrates. Percentage PS (10-50%) and curing days (7-28 days) factors were used in the optimization process. The leaching test of PAHs was assessed using a GC-MS. The best operating parameters to minimize PAHs leaching from solidified cubes with OPC and10% POFA were recorded with 10% PS and after 28 days, at which PAH leaching was 4.255 and 0.388 ppm with R
2 is 0.90%. Sensitivity analysis of the actual and predicted results for both the control and the test (OPC and 10% POFA) revealed that the actual results of the 10% POFA experiments have a high consistency with the predicted data (R2 0.9881) while R2 in the cement experiments was 0.8009. These differences were explained based on the responses of PAH leaching toward percentage of PS and days of cure. In the OPC encapsulation process, the main role was belonged to PS% (94.22%), while with 10% POFA, PS% contributed by 32.36 and cure day contributed by 66.91%., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2023 Elsevier Ltd. All rights reserved.)- Published
- 2023
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25. Deciphering Microalgal Diversity of Peculiar Lentic Ecosystem in Chennai, South India: A Way Towards Sustainability.
- Author
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Subramanian KG, Dhanushkodi M, Satyapriyan A, Nagarajan M, and Muthusamy G
- Abstract
Microalgae are quickly gaining attention among the researchers in various aspects such as biofuel applications, biogas, biomass production, waste water treatment, carbon fixation, animal feed ingredients, pigment production, and pharmaceutical products. One of the approaches to choose microalgae for biotechnological applications is to investigate their diversity and abundance in all possible wet environments. Samples were collected from three sampling sites for the period of 1 year (October 2021-September 2022) in Vadapalani temple tank at Chennai. Physicochemical parameters in current investigation were estimated according to APHA, 2017. Qualitative and quantitative analyses of phytoplankton were done throughout the study period. One-way ANOVA (Analyses of Variance) and Karl Pearson's correlation coefficient were estimated using SPSS (V.26.0). A total of 11 diversity indices were estimated using PAST (V 4.0). A total of 52 algal species were identified, prevailed over by Chlorophyceae (15 species), followed by Zygnematophyceae, Bacillariophyceae, Cyanophyceae, and Trebouxiophyceae. Chlorophyceae quantitatively structured the major category. The maximum and minimum values of density were observed during the season of summer (287 Cells/L) and monsoon (80 Cells/L), respectively. Chlorophyceae showed dominance with a density of 168 cells/L. The maximum and minimum densities of Chlorophyceae were recorded in the summer season (55 cells/L) and monsoon season (24 cells/L), respectively. Shannon's index (H') attained its zenith in February and April month of 2022 (3.60). This study further ignites the researchers to phycoprospect various temple water to address the nature of microalgae occurrence and for biotechnological purposes., (© 2023. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.)
- Published
- 2023
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26. An Intensive Study on Algal Diversity in the Ancient Man-Made Aquatic Ecosystem of Tiruvallur, South India: Exploration for Sustainable Development.
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Subramanian KG, Dhanushkodi M, Satyapriyan A, Nagarajan M, Muthuvinayagam P, Nallathambi M, Prabu E, Rajendiran D, and Muthusamy G
- Abstract
Eco-friendly and beneficial nature algae make it prominent in our earth as well as for human life. In recent decades, microalgal applications is sought in varied fields from the remediation of wastes to the production of pharmaceutical products. Still, more extensive research on bioprospecting should to conducted to get the genus-specific or species-specific applications of microalgae with high efficiency. This inquiry was carried out (October 2021 to September 2022) for the effectual understanding of microalgal composition structure along with seasonal physicochemical variations in the age-old holy tank at Tiruvallur, southeast India. This inquiry also acts as the source data and makes the bioprospecting process easier. It also ignites the researchers to address the microalgae seasonal composition structure of peculiar wet environments. A total of 41 microalgae species were recorded, in which six major algal groups were in order of, Chlorophyceae > Bacillariophyceae > Cyanophyceae > Euglenophyceae > Zygnematophyceae > Trebouxiophyceae. Mean seasonal abundance was highest in the summer season (351 cells/L) and lowest in the monsoon (113 cells/L). One-way ANOVA showed seasonal variations of physicochemical parameters, in which the majority of them attained their peak during summer. Mean values of water temperature, pH, salinity, total dissolved solids, total solids, electrical conductivity, chemical oxygen demand, total hardness, total alkalinity, ammonia, nitrite-nitrogen, and nitrate-nitrogen for the summer were 31.43 °C, 8.53, 0.56 ppt, 383 mg/L, 525 mg/L, 0.85 mS/cm, 46.27 mg/L, 300 ppm, 251.67 ppm, 1.51 mg/L, 0.62 mg/L, and 0.70 mg/L, respectively. Karl Pearson's correlation revealed a most significant relationship between water quality factors and algal density. The Shannon's diversity index (2.78-3.39) indicated moderately rich microalgal diversity in the study area. Palmer's pollution index stated that the temple tank was organically polluted all over the study period except November., (© 2023. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.)
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- 2023
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27. Evaluating Biofilm Inhibitory Potential in Fish Pathogen, Aeromonas hydrophila by Agricultural Waste Extracts and Assessment of Aerolysin Inhibitors Using In Silico Approach.
- Author
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Arumugam M, Manikandan DB, Marimuthu SK, Muthusamy G, Kari ZA, Téllez-Isaías G, and Ramasamy T
- Abstract
Aeromonas hydrophila , an opportunistic bacteria, causes several devastating diseases in humans and animals, particularly aquatic species. Antibiotics have been constrained by the rise of antibiotic resistance caused by drug overuse. Therefore, new strategies are required to prevent appropriate antibiotic inability from antibiotic-resistant strains. Aerolysin is essential for A. hydrophila pathogenesis and has been proposed as a potential target for inventing drugs with anti-virulence properties. It is a unique method of disease prevention in fish to block the quorum-sensing mechanism of A. hydrophila . In SEM analysis, the crude solvent extracts of both groundnut shells and black gram pods exhibited a reduction of aerolysin formation and biofilm matrix formation by blocking the QS in A. hydrophila . Morphological changes were identified in the extracts treated bacterial cells. Furthermore, in previous studies, 34 ligands were identified with potential antibacterial metabolites from agricultural wastes, groundnut shells, and black gram pods using a literature survey. Twelve potent metabolites showed interactions between aerolysin and metabolites during molecular docking analysis, in that H-Pyran-4-one-2,3 dihydro-3,5 dihydroxy-6-methyl (-5.3 kcal/mol) and 2-Hexyldecanoic acid (-5.2 kcal/mol) showed promising results with potential hydrogen bond interactions with aerolysin. These metabolites showed a better binding affinity with aerolysin for 100 ns in molecular simulation dynamics. These findings point to a novel strategy for developing drugs using metabolites from agricultural wastes that may be feasible pharmacological solutions for treating A. hydrophila infections for the betterment of aquaculture.
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- 2023
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28. A review on biodegradable polylactic acid (PLA) production from fermentative food waste - Its applications and degradation.
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Swetha TA, Ananthi V, Bora A, Sengottuvelan N, Ponnuchamy K, Muthusamy G, and Arun A
- Subjects
- Fermentation, Polyesters metabolism, Biopolymers metabolism, Lactic Acid metabolism, Food, Refuse Disposal
- Abstract
Due to its low carbon footprint and environmental friendliness, polylactic acid (PLA) is one of the most widely produced bioplastics in the world. Manufacturing attempts to partially replace petrochemical plastics with PLA are growing year over year. Although this polymer is typically used in high-end applications, its use will increase only if it can be produced at the lowest cost. As a result, food wastes rich in carbohydrates can be used as the primary raw material for the production of PLA. Lactic acid (LA) is typically produced through biological fermentation, but a suitable downstream separation process with low production costs and high product purity is also essential. The global PLA market has been steadily expanding with the increased demand, and PLA has now become the most widely used biopolymer across a range of industries, including packaging, agriculture, and transportation. Therefore, the necessity for an efficient manufacturing method with reduced production costs and a vital separation method is paramount. The primary goal of this study is to examine the various methods of lactic acid synthesis, together with their characteristics and the metabolic processes involved in producing lactic acid from food waste. In addition, the synthesis of PLA, possible difficulties in its biodegradation, and its application in diverse industries have also been discussed., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2023 Elsevier B.V. All rights reserved.)
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- 2023
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29. A comprehensive review on polylactic acid (PLA) - Synthesis, processing and application in food packaging.
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Swetha TA, Bora A, Mohanrasu K, Balaji P, Raja R, Ponnuchamy K, Muthusamy G, and Arun A
- Subjects
- Biopolymers chemistry, Fermentation, Polymerization, Humans, Animals, Biodegradable Plastics chemical synthesis, Biodegradable Plastics chemistry, Food Packaging methods, Green Chemistry Technology methods, Polyesters chemical synthesis, Polyesters chemistry
- Abstract
Plastics play an essential role in food packaging; their primary function is to preserve the nature of the food, ensure adequate shelf life and ensure food safety. Plastics are being produced on a global scale in excess of 320 million tonnes annually, with demand rising to reflect the material in wide range of applications. Nowadays, the packaging industry is a significant consumer of synthetic plastic made from fossil fuels. Petrochemical-based plastics are regarded as the preferred material for packaging. Nonetheless, using these plastics in large quantities results in a long-standing environment. Environmental pollution and the depletion of fossil fuels have prompted researchers and manufacturers to develop eco-friendly biodegradable polymers to replace petrochemical-based polymers. As a result, the production of eco-friendly food packaging material has sparked increased interest as a viable alternative to petrochemical-based polymers. Polylactic acid (PLA) is one of the compostable thermoplastic biopolymers that is biodegradable and renewable in nature. High-molecular-weight PLA can be used to produce fibres, flexible, non-wovens, hard and durable materials (100,000 Da or even higher).The chapter focuses on food packaging techniques, food industry waste, biopolymers, their classification, PLA synthesis, the importance of PLA properties for food packaging, and technologies used to process PLA in food packaging., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2023. Published by Elsevier B.V.)
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- 2023
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30. Microplastic contamination in commercial fish species in southern coastal region of India.
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Harikrishnan T, Janardhanam M, Sivakumar P, Sivakumar R, Rajamanickam K, Raman T, Thangavelu M, Muthusamy G, and Singaram G
- Subjects
- Animals, Humans, Plastics, Environmental Monitoring, Fishes, India, Microplastics, Water Pollutants, Chemical analysis
- Abstract
Due to its potential impact on food safety and human health, commercial species that have been contaminated with microplastics (MPs) are drawing more attention on a global scale. This study investigated the possibility of MPs contamination in different marine fish species with substantial commercial value that was captured off the south coast of India, from Adyar and Ennore regions. Over the course of six months, from October 2019 to March 2020, 220 fish were examined. It was discovered that the gills and guts had accumulated more numbers of MPs (1115 MPs) of which 68% were fibres and fragments. The commercial fish samples contained an average of 3.2-7.6 MPs per fish. Greater MPs pollution is seen in the Ennore regions. The prevalence of MPs was observed in carnivorous and planktivorous fish collected from both the sites. Fish guts contained the most MPs, according to the data. Pelagic fish accounted for the least amount of MPs, followed by mid- and demersal fish. Four different types of polymers were also identified in the present study: polyethylene, polypropylene, polystyrene, and polyamide. These results clearly showed the degree of microplastic contamination in fish tissues from the south Indian coastal regions of Adyar and Ennore. These results we hope will create a baseline data for MPs contamination in commercial fish species. The presence of MPs in the fish could have detrimental effects both on the environment and human health and thus comprehensive steps are required to prevent plastic pollution of the environment in south India's coastal region., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2022 Elsevier Ltd. All rights reserved.)
- Published
- 2023
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31. Photosynthetic microbial fuel cells for methanol treatment using graphene electrodes.
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Jawaharraj K, Sigdel P, Gu Z, Muthusamy G, Sani RK, and Gadhamshetty V
- Subjects
- Carbon, Carbon Fiber, Electrodes, Electron Transport Complex IV, Ferricyanides, Methanol, Nickel, Nitrates, Salts, Wastewater, Bioelectric Energy Sources, Graphite
- Abstract
Photosynthetic microbial fuel cells (pMFC) represent a promising approach for treating methanol (CH
3 OH) wastewater. However, their use is constrained by a lack of knowledge on the extracellular electron transfer capabilities of photosynthetic methylotrophs, especially when coupled with metal electrodes. This study assessed the CH3 OH oxidation capabilities of Rhodobacter sphaeroides 2.4.1 in two-compartment pMFCs. A 3D nickel (Ni) foam modified with plasma-grown graphene (Gr) was used as an anode, nitrate mineral salts media (NMS) supplemented with 0.1% CH3 OH as anolyte, carbon brush as cathode, and 50 mM ferricyanide as catholyte. Two simultaneous pMFCs that used bare Ni foam and carbon felt served as controls. The Ni/Gr electrode registered a two-fold lower charge transfer resistance (0.005 kΩ cm2 ) and correspondingly 16-fold higher power density (141 mW/m2 ) compared to controls. The underlying reasons for the enhanced performance of R. sphaeroides at the graphene interface were discerned. The real-time polymerase chain reaction (PCR) analysis revealed the upregulation of cytochrome c oxidase, aa3 type, subunit I gene, and Flp pilus assembly protein genes in the sessile cells compared to their planktonic counterparts. The key EET pathways used for sustaining CH3 OH oxidation were discussed., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2022 Elsevier Inc. All rights reserved.)- Published
- 2022
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32. Progress in the development of naturally derived active metabolites-based drugs: Potential therapeutics for Alzheimer's disease.
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Mani R, Sha Sulthana A, Muthusamy G, and Elangovan N
- Subjects
- Humans, Amyloid beta-Peptides, Anti-Inflammatory Agents, Alzheimer Disease drug therapy, Plants, Medicinal metabolism, Biological Products pharmacology, Biological Products therapeutic use, Biological Products chemistry
- Abstract
Alzheimer's disease (AD) is an extensive age-associated neurodegenerative disorder. In spite of wide-ranging progress in understanding the AD pathology for the past 50 years, clinical trials based on the hypothesis of amyloid-beta (Aβ) have reserved worsening particularly at late-stage human trials. Consequently, very few old drugs are presently used for AD with inadequate clinical consequences and various side effects. We focus on widespread pharmacological and beneficial principles for existing as well as future drugs. Multitargeting approaches by means of general antioxidant and anti-inflammatory mechanisms allied with particular receptor and/or enzyme-mediated actions in neuroprotection and neurodegeneration. The plant kingdom comprises a vast range of species with an incredible diversity of bioactive metabolites with diverse chemical scaffolds. In recent times, an increasing body of facts recommended the use of phytochemicals to decelerate AD's onset and progression. The definitive goal of AD investigation is to avert the onset of neurodegeneration, thereby allowing successful aging devoid of cognitive decline. At this point, we discussed the neurological protective role of natural products and naturally derived therapeutic agents for AD from various natural polyphenolic compounds and medicinal plants. In conclusion, medicinal plants act as a chief source of different bioactive constituents., (© 2022 International Union of Biochemistry and Molecular Biology, Inc.)
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- 2022
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33. The role of plant-associated rhizobacteria in plant growth, biocontrol and abiotic stress management.
- Author
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Bhat BA, Tariq L, Nissar S, Islam ST, Islam SU, Mangral Z, Ilyas N, Sayyed RZ, Muthusamy G, Kim W, and Dar TUH
- Subjects
- Plant Development, Rhizosphere, Stress, Physiological, Plant Roots microbiology, Soil Microbiology, Soil, Anti-Bacterial Agents, Hormones, Metals, Heavy, Pantoea
- Abstract
The rhizosphere is the region around the plant roots where maximum microbial activities occur. In the rhizosphere, microorganisms' beneficial and harmful activities affect plant growth and development. The mutualistic rhizospheric bacteria which improve plant growth and health are known as plant growth-promoting rhizobacteria (PGPR). They are very important due to their ability to help the plant in diverse ways. PGPR such as Pseudomonas, Bacillus, Azospirillum, Azotobacter, Arthrobacter, Achromobacter, Micrococcus, Enterobacter, Rhizobium, Agrobacterium, Pantoea and Serratia are now very well known. Rhizomicrobiome plays critical roles in nutrient acquisition and assimilation, improved soil texture, secreting and modulating extracellular molecules such as hormones, secondary metabolites, antibiotics and various signal compounds, all leading to the enhancement of plant growth and development. The microbes and compounds they secrete constitute valuable biostimulants and play pivotal roles in modulating plant stress responses. In this review, we highlight the rhizobacteria diversity and cutting-edge findings focusing on the role of a PGPR in plant growth and development. We also discussed the role of PGPR in resisting the adverse effects arising from various abiotic (drought, salinity, heat, heavy metals) stresses., (© 2022 Society for Applied Microbiology.)
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- 2022
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34. Assessment of nitrogen interaction with temperature on the growth and toxin production of mat-forming toxin-producing Anagnostidinema carotinosum.
- Author
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Anam GB, Muthusamy G, and Ahn YH
- Subjects
- Nitrogen, Temperature, Nitrates, Chlorophyll, Microcystins, Cyanobacteria
- Abstract
Aims: Global warming and eutrophication contribute to the severity of cyanobacteria blooms. However, it is unclear how these factors influence the growth and toxin production of Anagnostidinema carotinosum., Methods and Results: Based on morphological and molecular analysis, this is the first time A. carotinosum was identified in South Korea. The interactive effect of temperature (25, 30 or 34°C) and nitrogen (2.5, 3.5 or 4.5 mg NO
3 -N l-1 ) on A. carotinosum growth and toxin production was studied. Increasing nitrogen limitation reflects reduced growth and chlorophyll-a content at all temperatures. However, the growth was effective under nitrogen limitation when temperatures exceeded 25°C. The maximum growth was found at 30°C, followed by 34°C under higher nitrate levels (3.5 and 4.5 mg l-1 ). In addition, the cell microcystin and anatoxin-a quota increased significantly at 25°C with increasing nitrate limitation, decreasing considerably at 30°C in the same nitrate gradient., Conclusion: These results suggested temperatures stimulate A. carotinosum growth at 30 and 34°C and cellular toxin quota at 25 and 34°C with increasing NO3 -N levels., Significance and Impact of the Study: These findings imply that limiting nitrogen input alone can effectively reduce biomass; however, controlling A. carotinosum and its toxins at higher temperatures under nitrate limitation is necessary for water quality., (© 2022 Society for Applied Microbiology.)- Published
- 2022
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35. Remediation techniques for uranium removal from polluted environment - Review on methods, mechanism and toxicology.
- Author
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Akash S, Sivaprakash B, Raja VCV, Rajamohan N, and Muthusamy G
- Subjects
- Biodegradation, Environmental, Ecosystem, Soil, Soil Pollutants analysis, Uranium analysis
- Abstract
Uranium, a radionuclide, is a predominant element utilized for speciality requirements in industrial applications, as fuels and catalyst. The radioactive properties and chemical toxicity of uranium causes a major threat to the ecosystem. The hazards associated with Uranium pollution includes the cancer in bones, liver, and lungs. The toxicological properties of Uranium are discussed in detail. Although there are many methods to eliminate those hazards, this research work is aimed to describe the application of bioremediation methods. Bioremediation methods involve elimination of the hazards of uranium, by transforming into low oxidation form using natural microbes and plants. This study deeply elucidates the methods as bioleaching, biosorption, bioreduction and phytoremediation. Bioleaching process involves bio-oxidation of tetravalent uranium when it gets in contact with acidophilic metal bacterial complex to obtain leach liquor. In biosorption, chitin/chitosan derived sorbents act as chelators and binds with uranium by electrostatic attraction. Bio reduction employs a bacterial transformation into enzymes which immobilize and reduce uranium. Phytoremediation includes phytoextraction and phytotranslocation of uranium through xylems from soil to roots and shoots of plants. The highest uranium removal and uptake reported using the different methods are listed as follows: bioleaching (100% uranium recovery), biosorption (167 g kg
-1 uranium uptake), bioreduction (98.9% uranium recovery), and phytoremediation (49,639 mg kg-1 uranium uptake). Among all the techniques mentioned above, bioleaching has been proved to be the most efficient for uranium remediation., (Copyright © 2022 Elsevier Ltd. All rights reserved.)- Published
- 2022
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36. Detoxification of coir pith through refined vermicomposting engaging Eudrilus eugeniae.
- Author
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Jayakumar M, Emana AN, Subbaiya R, Ponraj M, Ashok Kumar KK, Muthusamy G, Kim W, and Karmegam N
- Subjects
- Animals, Cattle, Female, Lignin analogs & derivatives, Soil, Manure, Oligochaeta
- Abstract
Hazardous coir industrial waste, coir pith has been subjected to 50 days vermicomposting with Eudrilus eugeniae by amending nitrogenous legume plant, Gliricidia sepium together with cattle dung in different combinations, after 21 days precomposting using Pleurotus sajor-caju spawn. An increase in electrical conductivity, total NPK and calcium, and a decrease in organic matter, total organic carbon, C/N ratio, C/P ratio and total phenolic content in the final vermicompost were observed. Dehydrogenase, urease and cellulase activity peaked up to 30 days of vermicomposting and then declined. The phytotoxicity studies with Brassica juncea, C/N ratio and enzyme activities confirmed the stability and maturity of vermicompost. The results also demonstrated that the 2:3:1 ratio (coir pith + Gliricidia sepium + cow dung) is a suitable effective combination for nutrient-rich (N: 2.43%; P: 0.92%; K: 2.09%) vermicompost production. The total phenolic contents declined during the vermicomposting with a lower final content of 21.26 mg/g GAE in 2:3:1 combination of substrates from the initial level (105.56 mg/g GAE). Besides, the concentration of total phenol contents inversely related to the germination index of Brassica juncea (r = -0.761), indicating that the phenolic content could also play an important role in phytotoxicity. Growth and fecundity of Eudrilus eugeniae in 2:3:1 combination revealed the acceptability and rapid decomposition of coir pith substrate into vermifertilizer., (Copyright © 2021 Elsevier Ltd. All rights reserved.)
- Published
- 2022
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37. Investigating Genetic and Other Determinants of First-Onset Myocardial Infarction in Malaysia: Protocol for the Malaysian Acute Vascular Events Risk Study.
- Author
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Chowdhury R, Noh MFM, Ismail SR, van Daalen KR, Kamaruddin PSNM, Zulkiply SH, Azizul NH, Khalid NM, Ali A, Idris IM, Mei YS, Abdullah SR, Faridus N, Yusof NAM, Yusoff NNFM, Jamal R, Rahim AAA, Ghapar AKA, Radhakrishnan AK, Fong AYY, Ismail O, Krishinan S, Lee CY, Bang LH, Mageswaren E, Mahendran K, Amin NHM, Muthusamy G, Jin AOH, Ramli AW, Ross NT, Ruhani AI, Yahya M, Yusoff Y, Abidin SKZ, Amado L, Bolton T, Weston S, Crawte J, Ovenden N, Michielsen A, Monower MM, Mahiyuddin WRW, Wood A, Di Angelantonio E, Sulaiman NS, Danesh J, and Butterworth AS
- Abstract
Background: Although the burden of premature myocardial infarction (MI) is high in Malaysia, direct evidence on the determinants of MI in this multi-ethnic population remains sparse., Objective: The Malaysian Acute Vascular Events Risk (MAVERIK) study is a retrospective case-control study established to investigate the genomic, lipid-related, and other determinants of acute MI in Malaysia. In this paper, we report the study protocol and early results., Methods: By June 2019, we had enrolled approximately 2500 patients with their first MI and 2500 controls without cardiovascular disease, who were frequency-matched by age, sex, and ethnicity, from 17 hospitals in Malaysia. For each participant, serum and whole blood have been collected and stored. Clinical, demographic, and behavioral information has been obtained using a 200-item questionnaire., Results: Tobacco consumption, a history of diabetes, hypertension, markers of visceral adiposity, indicators of lower socioeconomic status, and a family history of coronary disease were more prevalent in cases than in controls. Adjusted (age and sex) logistic regression models for traditional risk factors indicated that current smoking (odds ratio [OR] 4.11, 95% CI 3.56-4.75; P<.001), previous smoking (OR 1.34, 95% CI 1.12-1.60; P=.001), a history of high blood pressure (OR 2.13, 95% CI 1.86-2.44; P<.001), a history of diabetes mellitus (OR 2.72, 95% CI 2.34-3.17; P<.001), a family history of coronary heart disease (OR 1.28, 95% CI 1.07-1.55; P=.009), and obesity (BMI >30 kg/m
2 ; OR 1.19, 95% CI 1.05-1.34; P=.009) were associated with MI in age- and sex-adjusted models., Conclusions: The MAVERIK study can serve as a useful platform to investigate genetic and other risk factors for MI in an understudied Southeast Asian population. It should help to hasten the discovery of disease-causing pathways and inform regionally appropriate strategies that optimize public health action., International Registered Report Identifier (irrid): RR1-10.2196/31885., (©Rajiv Chowdhury, Mohd Fairulnizal Md Noh, Sophia Rasheeqa Ismail, Kim Robin van Daalen, Puteri Sofia Nadira Megat Kamaruddin, Siti Hafizah Zulkiply, Nur Hayati Azizul, Norhayati Mustafa Khalid, Azizan Ali, Izyan Mohd Idris, Yong Shih Mei, Shazana Rifham Abdullah, Norfashihah Faridus, Nur Azirah Md Yusof, Nur Najwa Farahin M Yusoff, Rahman Jamal, Aizai Azan Abdul Rahim, Abdul Kahar Abdul Ghapar, Ammu Kutty Radhakrishnan, Alan Yean Yip Fong, Omar Ismail, Saravanan Krishinan, Chuey Yan Lee, Liew Houng Bang, Eashwary Mageswaren, Kauthaman Mahendran, Nor Hanim Mohd Amin, Gunavathy Muthusamy, Aaron Ong Hean Jin, Ahmad Wazi Ramli, Noel Thomas Ross, Anwar Irawan Ruhani, Mansor Yahya, Yusniza Yusoff, Siti Khairani Zainal Abidin, Laryssa Amado, Thomas Bolton, Sophie Weston, Jason Crawte, Niko Ovenden, Ank Michielsen, Md Mostafa Monower, Wan Rozita Wan Mahiyuddin, Angela Wood, Emanuele Di Angelantonio, Nur Suffia Sulaiman, John Danesh, Adam S Butterworth. Originally published in JMIR Research Protocols (https://www.researchprotocols.org), 10.02.2022.)- Published
- 2022
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38. Artificial intelligence (AI) applications in adsorption of heavy metals using modified biochar.
- Author
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Lakshmi D, Akhil D, Kartik A, Gopinath KP, Arun J, Bhatnagar A, Rinklebe J, Kim W, and Muthusamy G
- Subjects
- Adsorption, Charcoal, Artificial Intelligence, Metals, Heavy
- Abstract
The process of removal of heavy metals is important due to their toxic effects on living organisms and undesirable anthropogenic effects. Conventional methods possess many irreconcilable disadvantages pertaining to cost and efficiency. As a result, the usage of biochar, which is produced as a by-product of biomass pyrolysis, has gained sizable traction in recent times for the removal of heavy metals. This review elucidates some widely recognized harmful heavy metals and their removal using biochar. It also highlights and compares the variety of feedstock available for preparation of biochar, pyrolysis variables involved and efficiency of biochar. Various adsorption kinetics and isotherms are also discussed along with the process of desorption to recycle biochar for reuse as adsorbent. Furthermore, this review elucidates the advancements in remediation of heavy metals using biochar by emphasizing the importance and advantages in the usage of machine learning (ML) and artificial intelligence (AI) for the optimization of adsorption variables and biochar feedstock properties. The usage of AI and ML is cost and time-effective and allows an interdisciplinary approach to remove heavy metals by biochar., Competing Interests: Declaration of competing interest The authors declared that they don’t have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2021. Published by Elsevier B.V.)
- Published
- 2021
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39. A crucial review on polycyclic aromatic Hydrocarbons - Environmental occurrence and strategies for microbial degradation.
- Author
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Premnath N, Mohanrasu K, Guru Raj Rao R, Dinesh GH, Prakash GS, Ananthi V, Ponnuchamy K, Muthusamy G, and Arun A
- Subjects
- Acinetobacter, Biodegradation, Environmental, Cupriavidus, Ecosystem, Fusarium, Humans, Pseudomonas, Soil Microbiology, Sphingomonadaceae, Chlorella, Polycyclic Aromatic Hydrocarbons, Soil Pollutants
- Abstract
Over the last century, contamination of polycyclic aromatic hydrocarbons (PAHs) has risen tremendously due to the intensified industrial activities like petrochemical, pharmaceutical, insecticides and fertilizers applications. PAHs are a group of organic pollutants with adverse effects on both humans and the environment. These PAHs are widely distributed in various ecosystems including air, soil, marine water and sediments. Degradation of PAHs generally occurs through processes like photolysis, adsorption, volatilization, chemical degradation and microbial degradation. Microbial degradation of PAHs is done by the utilization of diverse microorganisms like algae, bacteria, fungi which are readily compatible with biodegrading/bio transforming PAHs into H
2 O, CO2 under aerobic, or CH4 under anaerobic environment. The rate of PAHs degradation using microbes is mainly governed by various cultivation conditions like temperature, pH, nutrients availability, microbial population, chemical nature of PAHs, oxygen and degree of acclimation. Several microbial species including Selenastrum capricornutum, Ralstonia basilensis, Acinetobacter haemolyticus, Pseudomonas migulae, Sphingomonas yanoikuyae and Chlorella sorokiniana are known to degrade PAHs via biosorption and enzyme-mediated degradation. Numerous bacterial mediated PAHs degradation methods are studied globally. Among them, PAHs degradation by bacterial species like Pseudomonas fluorescence, Pseudomonas aeruginosa, Rhodococcus spp., Paenibacillus spp., Mycobacterium spp., and Haemophilus spp., by various degradation modes like biosurfactant, bioaugmentation, biostimulation and biofilms mediated are also investigated. In contrarily, PAHs degradation by fungal species such as Pleurotus ostreatus, Polyporus sulphureus, Fusarium oxysporum occurs using the activity of its ligninolytic enzymes such as lignin peroxidase, laccase, and manganese peroxidase. The present review highlighted on the PAHs degradation activity by the algal, fungal, bacterial species and also focused on their mode of degradation., (Copyright © 2021 Elsevier Ltd. All rights reserved.)- Published
- 2021
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40. Evaluation of GABA Production and Probiotic Activities of Enterococcus faecium BS5.
- Author
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Bs S, Thankappan B, Mahendran R, Muthusamy G, Femil Selta DR, and Angayarkanni J
- Subjects
- Enterococcus faecium metabolism, Probiotics, gamma-Aminobutyric Acid biosynthesis
- Abstract
Gamma-aminobutyric acid (GABA) is a principal inhibitory neurotransmitter in the central nervous system and is produced by irreversible decarboxylation of glutamate. It possesses several physiological functions such as neurotransmission, diuretic, and tranquilizer effects and also regulates cardiovascular functions such as blood pressure and heart rate in addition to playing a role in the reduction of pain and anxiety. The objective of this study was to evaluate the GABA producing ability and probiotic capability of certain lactic acid bacteria strains isolated from dairy products. Around sixty-four bacterial isolates were collected and screened for their ability to produce GABA from monosodium glutamate, among which nine isolates were able to produce GABA. The most efficient GABA producer was Enterococcus faecium BS5. Further, assessment of several important and desirable probiotic properties showed that Ent. faecium BS5 was resistant to acid stress, bile salt, and antibiotics. Ent. faecium BS5 may potentially be used for large-scale industrial production of GABA and also for functional fermented product development., (© 2021. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.)
- Published
- 2021
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41. PAMAM G4.5 dendrimers for targeted delivery of ferulic acid and paclitaxel to overcome P-glycoprotein-mediated multidrug resistance.
- Author
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Anbazhagan R, Muthusamy G, Krishnamoorthi R, Kumaresan S, Rajendra Prasad N, Lai JY, Yang JM, and Tsai HC
- Subjects
- ATP Binding Cassette Transporter, Subfamily B metabolism, Apoptosis drug effects, Cell Line, Tumor, Humans, Coumaric Acids chemistry, Coumaric Acids pharmacology, Dendrimers chemistry, Dendrimers pharmacology, Drug Delivery Systems, Drug Resistance, Multiple drug effects, Drug Resistance, Neoplasm drug effects, Neoplasm Proteins metabolism, Neoplasms drug therapy, Neoplasms metabolism, Paclitaxel chemistry, Paclitaxel pharmacology
- Abstract
In this study, we prepared ferulic acid (FA) and paclitaxel (PTX) co-loaded polyamidoamine (PAMAM) dendrimers conjugated with arginyl-glycyl-aspartic acid (RGD) to overcome P-glycoprotein (P-gp)-mediated multidrug resistance (MDR). FA was released in greater extent (80%) from the outer layer of the dendrimers compared with PTX (70%) from the interior of the dendrimers. FA improved intracellular availability of PTX via P-gp modulation in drug-resistant cells. In vitro drug uptake data show higher PTX delivery with RGD-PAMAM-FP than with PAMAM-FP in drug resistant KB CH-R 8-5 cell lines. This indicates that RGD facilitates intracellular PTX accumulation through active targeting in multidrug-resistant KB CH-R 8-5 cells. The terminal deoxynucleotidyl transferase 2'-deoxyuridine 5'-triphosphate nick-end labeling assay data and membrane potential analysis in mitochondria confirm the enhanced anticancer potential of RGD-PAMAM-FP nanoaggregates in drug-resistant cells. We also confirmed by the increased protein levels of proapoptotic factors such as caspase 3, caspase 9, p53, and Bax after treatment with RGD-PAMAM-FP nanoaggregates and also downregulates antiapoptotic factors. Hence, FA-PTX co-loaded, RGD-functionalized PAMAM G4.5 dendrimers may be considered as an effective therapeutic strategy to induce apoptosis in P-gp-overexpressing, multidrug-resistant cells., (© 2020 Wiley Periodicals LLC.)
- Published
- 2021
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42. Revisiting the plant growth-promoting rhizobacteria: lessons from the past and objectives for the future.
- Author
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Aeron A, Khare E, Jha CK, Meena VS, Aziz SMA, Islam MT, Kim K, Meena SK, Pattanayak A, Rajashekara H, Dubey RC, Maurya BR, Maheshwari DK, Saraf M, Choudhary M, Verma R, Meena HN, Subbanna ARNS, Parihar M, Shukla S, Muthusamy G, Bana RS, Bajpai VK, Han YK, Rahman M, Kumar D, Singh NP, and Meena RK
- Subjects
- Bacteria metabolism, Nitrogen metabolism, Plant Development, Soil chemistry, Stress, Physiological, Agriculture trends, Bacterial Physiological Phenomena, Plants microbiology, Soil Microbiology
- Abstract
Plant beneficial rhizobacteria (PBR) is a group of naturally occurring rhizospheric microbes that enhance nutrient availability and induce biotic and abiotic stress tolerance through a wide array of mechanisms to enhance agricultural sustainability. Application of PBR has the potential to reduce worldwide requirement of agricultural chemicals and improve agro-ecological sustainability. The PBR exert their beneficial effects in three major ways; (1) fix atmospheric nitrogen and synthesize specific compounds to promote plant growth, (2) solubilize essential mineral nutrients in soils for plant uptake, and (3) produce antimicrobial substances and induce systemic resistance in host plants to protect them from biotic and abiotic stresses. Application of PBR as suitable inoculants appears to be a viable alternative technology to synthetic fertilizers and pesticides. Furthermore, PBR enhance nutrient and water use efficiency, influence dynamics of mineral recycling, and tolerance of plants to other environmental stresses by improving health of soils. This report provides comprehensive reviews and discusses beneficial effects of PBR on plant and soil health. Considering their multitude of functions to improve plant and soil health, we propose to call the plant growth-promoting bacteria (PGPR) as PBR.
- Published
- 2020
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43. Microbial (Enzymatic) Degradation of Cyanide to Produce Pterins as Cofactors.
- Author
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Mahendran R, Bs S, Thandeeswaran M, kG K, Vijayasarathy M, Angayarkanni J, and Muthusamy G
- Subjects
- Carbon metabolism, Cyanates metabolism, Humans, Metabolic Networks and Pathways, Pterins classification, Bacteria enzymology, Biodegradation, Environmental, Coenzymes metabolism, Cyanides metabolism, Pterins metabolism
- Abstract
Cyanide is one of the most poisonous substances in the environment, which may have originated from natural and anthropogenic sources. There are many enzymes produced by microorganisms which can degrade and utilize cyanide. The major byproducts of cyanide degradation are alanine, glutamic acid, alpha-amino-butyric acid, beta-cyanoalanine, pterin etc. These products have many pharmaceutical and medicinal applications. For the degradation of cyanide, microbes produce necessary cofactors which catalyze the degradation pathways. Pterin is one of the cofactors for cyanide degradation. There are many pathways involved for the degradation of cyanide, cyanate, and thiocyanate. Some of the microorganisms possess resistance to cyanide, since they have developed adaptive alternative pathways for the production of ATP by utilization of cyanide as carbon and nitrogen sources. In this review, we summarized different enzymes, their mechanisms, and corresponding pathways for the degradation of cyanide and production of pterins during cyanide degradation. We aim to enlighten different types of pterin, its classification, and biological significance through this literature review.
- Published
- 2020
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44. A Brief Review on the Non-protein Amino Acid, Gamma-amino Butyric Acid (GABA): Its Production and Role in Microbes.
- Author
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Sarasa SB, Mahendran R, Muthusamy G, Thankappan B, Selta DRF, and Angayarkanni J
- Subjects
- Animals, Bacteria genetics, Glutamate Decarboxylase metabolism, Humans, gamma-Aminobutyric Acid genetics, Bacteria enzymology, Butyric Acid metabolism, Glutamic Acid metabolism, Metabolic Networks and Pathways, gamma-Aminobutyric Acid biosynthesis, gamma-Aminobutyric Acid metabolism
- Abstract
Gamma-Aminobutyric acid (GABA) is a non-protein amino acid widely distributed in nature. It is produced through irreversible α-decarboxylation of glutamate by enzyme glutamate decarboxylase (GAD). GABA and GAD have been found in plants, animals, and microorganisms. GABA is distributed throughout the human body and it is involved in the regulation of cardiovascular conditions such as blood pressure and heart rate, and plays a role in the reduction of anxiety and pain. Although researchers had produced GABA by chemical method earlier it became less acceptable as it pollutes the environment. Researchers now use a more promising microbial method for the production of GABA. In the drug and food industry, demand for GABA is immense. So, large scale conversion of GABA by microbes has got much attention. So this review focuses on the isolation source, production, and functions of GABA in the microbial system. We also summarize the mechanism of action of GABA and its shunt pathway.
- Published
- 2020
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45. Folate-Gold-Bilirubin Nanoconjugate Induces Apoptotic Death in Multidrug-Resistant Oral Carcinoma Cells.
- Author
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Rathinaraj P, Muthusamy G, Prasad NR, Gunaseelan S, Kim B, and Zhu S
- Subjects
- ATP Binding Cassette Transporter, Subfamily B genetics, Animals, Antineoplastic Agents administration & dosage, Antineoplastic Agents pharmacology, Apoptosis drug effects, Bilirubin administration & dosage, Drug Resistance, Multiple, Drug Resistance, Neoplasm, Gold chemistry, Humans, KB Cells, Metal Nanoparticles, Mice, Mice, Nude, Nanoconjugates, Xenograft Model Antitumor Assays, Bilirubin pharmacology, Drug Delivery Systems, Folic Acid chemistry, Mouth Neoplasms drug therapy
- Abstract
Background: Gold nanoparticles (GNPs) are receiving increasing attention as drug delivery carriers due to their high surface-to-volume ratio, hydrophilicity, and functionality. Drug delivery by nanocarriers has the potential to bypass P-glycoprotein (P-gp)-mediated multidrug resistance (MDR) by altering the drug internalization mechanism and/or intracellular release pattern, inhibiting the activity of ABC-transporter efflux pumps, or downregulating the expression of genes responsible for the activity of efflux pumps., Objective: We developed a folate-gold-bilirubin (FGB) nanoconjugate to reverse MDR in P-expressing KB-Ch
R -8-5 cells., Methods: The P-gp overexpressing KB-ChR -8-5 cells were incubated with the FGB nanoconjugate, bilirubin, or GNPs. Various cellular endpoints, such as cytotoxicity, ROS generation, DNA damage, and apoptosis, were analyzed using analytical methods. Further, a KB-ChR -8-5 cell-bearing tumor xenograft was developed and the anticancer potential of the prepared FGB nanoparticles was compared to that of bilirubin or GNPs in this preclinical model., Results: The FGB nanoconjugate was found to be a stronger inhibitor of the viability of multidrug-resistant KB-ChR -8-5 cells than bilirubin and GNPs treatment alone. The nanoconjugate induced reactive oxygen species (ROS) formation, DNA strand breaks, and apoptotic morphological changes in the P-gp-overexpressing drug-resistant cells to a greater degree than bilirubin treatment alone. Also, the FGB nanoparticles led to stronger suppression of tumor development in the KB-ChR -8-5 xenograft mouse model than achieved with bilirubin treatment alone. Thus, the present results suggest that the FGB nanoconjugate suppresses tumor growth in drug-resistant tumor cells by inducing apoptotic cell death., Conclusion: FGB nanoparticles significantly inhibit tumor growth, probably through the folate receptor, which is highly expressed in KB cells. Hence, folate-gold-bilirubin nanoparticles could be a promising agent for inducing apoptosis in P-gp-overexpressing drug-resistant cancer cells.- Published
- 2020
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46. Correction: The preventive effect of linalool on acute and chronic UVB-mediated skin carcinogenesis in Swiss albino mice.
- Author
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Gunaseelan S, Balupillai A, Govindasamy K, Muthusamy G, Ramasamy K, Shanmugam M, and Rajendra Prasad N
- Abstract
Correction for 'The preventive effect of linalool on acute and chronic UVB-mediated skin carcinogenesis in Swiss albino mice' by Srithar Gunaseelan, et al., Photochem. Photobiol. Sci., 2016, 15, 851-860.
- Published
- 2019
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47. Ferulic acid reverses P-glycoprotein-mediated multidrug resistance via inhibition of PI3K/Akt/NF-κB signaling pathway.
- Author
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Muthusamy G, Gunaseelan S, and Prasad NR
- Subjects
- ATP Binding Cassette Transporter, Subfamily B metabolism, Animals, Cell Line, Tumor, Cyclosporine pharmacology, Doxorubicin pharmacology, Humans, Mice, Nude, NF-kappa B genetics, NF-kappa B metabolism, Phosphatidylinositol 3-Kinases metabolism, Proto-Oncogene Proteins c-akt metabolism, Xenograft Model Antitumor Assays, ATP Binding Cassette Transporter, Subfamily B, Member 1 metabolism, Antineoplastic Agents pharmacology, Coumaric Acids pharmacology, Drug Resistance, Neoplasm drug effects
- Abstract
In this study, the modulatory effect of ferulic acid on P-glycoprotein (P-gp)-mediated multidrug resistance (MDR) was examined in KB Ch
R 8-5 resistant cells and drug-resistant tumor xenografts. We observed that ferulic acid enhanced the cytotoxicity of doxorubicin and vincristine in the P-gp overexpressing KB ChR 8-5 cells. Further, ferulic acid enhances the doxorubicin induced γH2AX foci formation and synergistically augmented doxorubicin-induced apoptotic signaling in the drug-resistant cells. It has also been noticed that NF-κB nuclear translocation was suppressed by ferulic acid and that this response might be associated with the modulation of phosphatidyinositol 3-kinase (PI3K)/Akt/signaling pathway. We also found that ferulic acid and doxorubicin combination reduced the size of KB ChR 8-5 tumor xenograft by threefold as compared to doxorubicin-alone treated group. Thus, ferulic acid contributes to the reversal of the MDR through suppression of P-gp expression via the inhibition of PI3K/Akt/NF-κB signaling pathway., (Copyright © 2018 Elsevier Inc. All rights reserved.)- Published
- 2019
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48. Screening of anti-inflammatory phytocompounds from Crateva adansonii leaf extracts and its validation by in silico modeling.
- Author
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Thirumalaisamy R, Ammashi S, and Muthusamy G
- Abstract
Anti-inflammatory phytocompounds from Crateva adansonii DC leaf extracts were identified by GCMS analysis and its anti-inflammatory potential was evaluated by in silico molecular docking study against inflammatory molecular targets. Three different (Aqueous, Methanol and Petroleum ether) dried leaf extracts of Crateva adansonii were obtained from soxhlet extraction method. Preliminary phytoconstituents analysis of three different leaf extracts of C. adansonii confirmed the presence of various major classes of bioactive phytoconstituents such as polyphenols (tannins and flavonoids), steroids, alkaloid, coumarin, carbohydrate and terpenoids . Among three leaf extracts, methanolic leaf extract possess highest total phenolic content of 77 ± 1.65 µg gallic acid equivalent (GAE)/g of dry weight of leaf extract, subsequently methanolic leaf extract also shows maximal in vitro antioxidant activity (DPPH scavenging activity) of 71.22 ± 1.32% among three different leaf extracts. GC-MS analysis of petroleum ether leaf extract revealed the presence of nine phytocompounds representing 95.43% peak area percentage, among nine identified phytocompounds three phytocompounds of C. adansonii possess anti-inflammatory property namely phytol, 1-Hexyl-2-Nitrohexane and 2-Isopropyl-5-Methylcyclohexyl 3-(1-(4-Chlorophenyl)-3-Oxobutyl)-Coumarin-4-Yl Carbonate were chosen for in silico molecular docking study against four inflammatory receptor targets (COX-2, TNFα, IL-1β and IL-6) and they shows less binding energy with highest docking score ranging from -15.9500 to 5.0869. The present study substantially indicated and proven that anti-inflammatory potential of phytocompounds from C. adansonii leaf extracts which can be exploited for commercial designing of novel anti-inflammatory drug to treat various inflammatory disorders.
- Published
- 2018
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49. Stereoselective synthesis of E-3-(arylmethylidene)-5-(alkyl/aryl)-2(3H)-furanones by sequential hydroacyloxylation-Mizoroki-Heck reactions of iodoalkynes.
- Author
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Muthusamy G and Pansare SV
- Abstract
A modular, stereoselective synthesis of E-3-(arylidene)-5-(alkyl/aryl)-2(3H)-furanones was developed. The methodology features regioselective addition of β-aryl acrylic acids to iodoacetylenes to furnish the Z-acyloxy iodoalkenes. A stereoselective 5-exo-trig Mizoroki-Heck reaction of the acyloxy iodoalkenes generates the target E-2(3H)-furanones. The approach was applied in a formal synthesis of the naturally occurring kinase inhibitor BE-23372M.
- Published
- 2018
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- View/download PDF
50. Predicting Tumor Sensitivity to Chemotherapeutic Drugs in Oral Squamous Cell Carcinoma Patients.
- Author
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Robert BM, Dakshinamoorthy M, Ganapathyagraharam Ramamoorthy B, Dhandapani M, Thangaiyan R, Muthusamy G, Nirmal RM, and Prasad NR
- Subjects
- Biopsy, Humans, Antineoplastic Agents pharmacology, Carcinoma, Squamous Cell drug therapy, Drug Resistance, Neoplasm, Drug Screening Assays, Antitumor methods, Epithelial Cells drug effects, Gene Expression Profiling methods, Mouth Neoplasms drug therapy
- Abstract
Oral Squamous Cell Carcinoma (OSCC) patients respond poorly to chemotherapy. We analyzed the expression of 11 drug response-related genes in 31 OSCC biopsies, collected prior to any treatment, using custom-designed PCR array. Further, we investigated the drug response pattern of selected anticancer drugs by BH3 (Bcl2 Homology-3) profiling in the primary cells isolated from OSCC tissues. Then, we correlated the results of drug-response gene expression pattern with apoptotic priming to predict tumor response to chemotherapy. The best performing drug (BPD) and response differences (RD) between the drugs were identified using statistical methods to select the best choice of drug in a personalized manner. Based on the correlation, we classified OSCC tumors as sensitive (13 tumors), moderately responsive (16 tumors) or resistant (2 tumors) to chemotherapy. We found that up-regulation of genes linked with drug resistance facilitates survival of tumor samples, which was revealed by the percentage of apoptotic priming. Moreover, we found that paclitaxel-induced 40-45% apoptotic priming compared to other drugs. Average response difference (RD) analysis showed that 80% of tumors responded well to paclitaxel as compared to other drugs studied. Therefore, gene expression analysis with BH3 profiling reveals drug sensitivity that could be translated for drug selection before treatment.
- Published
- 2018
- Full Text
- View/download PDF
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