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Aswathy S, Shyamalagowri S, Hari S, Kanimozhi M, Meenambiga SS, Thenmozhi M, Karthiyayini R, Suresh D, Manjunathan J. Comparative studies on the cultivation, yield, and nutritive value of an edible mushroom, Pleurotus tuber-regium (Rumph. ex Fr.) Singer, grown under different agro waste substrates. 3 Biotech 2024; 14:123. [PMID: 38562248 PMCID: PMC10981651 DOI: 10.1007/s13205-024-03968-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Accepted: 02/26/2024] [Indexed: 04/04/2024] Open
Abstract
In the present study, Pleurotus tuber-regium (Rumph. ex Fr.) Singer collected from Keeriparai forest of Kanyakumari district, South India was cultivated using environmentally benign, low-cost agricultural waste residues (paddy straw, sugarcane bagasse, rice husk, and sawdust) as growth substrates. The main goal of this study was to assess the cultivation, yield, and nutritional value of P. tuber-regium fruiting bodies grown under different growth substrates. Spawn running time and time for primordia formation were found to be shorter in mushroom growing with paddy straw substrate compared to sawdust and sugarcane bagasse. A quick spawn run time was observed in paddy straw substrate (12 ± 1 day) followed by sugarcane bagasse (15 ± 1 day) and sawdust (23 ± 1 day). The primordia was well developed in the macrofungus grown with paddy straw substrate on 18 ± 1 day followed by sugarcane bagasse (22 ± 1 day) and sawdust (32 ± 1 day). Significantly higher yield of fruiting bodies with increased contents of protein and carbohydrate and low level of fat was obtained when P. tuber-regium was cultivated with paddy straw substrate. While, cultivation of P. tuber-regium in sawdust and sugarcane bagasse resulted in increased contents of K, Na, Ca, and Mg along with highest energy value. On the other hand, rice husk did not support the cultivation of this macrofungus. Therefore, it is of significant interest to initiate the commercial production of this macrofungus so as to fight against the problems of malnutrition found in few African and south Asian countries.
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Affiliation(s)
- S. Aswathy
- Department of Biotechnology, Vel’s Institute of Science, Technology and Advanced Studies (VISTAS), Chennai, TN 600044 India
| | - S. Shyamalagowri
- Department of Botany, Pachaiyappa’s College, Chennai, TN 600030 India
| | - Sowmya Hari
- Department of Bioengineering, School of Engineering, Vel’s Institute of Science, Technology and Advanced Studies (VISTAS), Chennai, TN 600044 India
| | - M. Kanimozhi
- Department of Plant Biology and Plant Biotechnology, Ethiraj College for Women, Chennai, TN 600008 India
| | - S. S. Meenambiga
- Department of Bioengineering, School of Engineering, Vel’s Institute of Science, Technology and Advanced Studies (VISTAS), Chennai, TN 600044 India
| | - M. Thenmozhi
- Department of Biotechnology, Vel’s Institute of Science, Technology and Advanced Studies (VISTAS), Chennai, TN 600044 India
| | - R. Karthiyayini
- Department of Botany, Avinashilingam Institute for Home Science and Higher Education for Women, Coimbatore, TN 641043 India
| | - D. Suresh
- Department of Microbiology, Vel’s Institute of Science, Technology and Advanced Studies (VISTAS), Chennai, TN 600044 India
| | - J. Manjunathan
- Department of Biotechnology, Vel’s Institute of Science, Technology and Advanced Studies (VISTAS), Chennai, TN 600044 India
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Suresh D, Annamalai S. Effect of schedule management plan in project management worth using structural equation modelling. AN ACAD BRAS CIENC 2024; 96:e20230117. [PMID: 38477770 DOI: 10.1590/0001-3765202420230117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Accepted: 12/02/2023] [Indexed: 03/14/2024] Open
Abstract
With the growing digitalization and the need for customers to have more personalized services available, there is a constant need to innovate and fulfil the demands of customers. However, this burden has contributed to further worsening the schedule management for the service companies. Customers now are demanding more personalized service but without having any compromise on the quality and time of delivery. This resulted in creating the need to have a schedule-driven management plan designed. Despite this advantage, there are very limited studies available that even focus on the concept whereas not any study works towards understanding its contribution in affecting project management for service companies. To overcome this, the study aims to assess the perception of 200 employees and 10 managers for understanding a schedule management plan and its impact on project management worth. The employee's perception evaluation via structural equation modelling revealed that there is no direct influence of schedule management on project management worth but via different factors and strategies the influence could be derived. Managers' perceptions validated the findings and provided insight that strategies like the building of a cloud-based platform or predictive modelling should be designed for better schedule management plan development.
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Affiliation(s)
- D Suresh
- Assistent Professor, Department of Mechanical Engineering, V.S.B Engineering College, 67, Kovai Main Road, Karudayampalayam Post, Karur, 639111 Tamil Nadu, India
| | - Sivakumar Annamalai
- Professor, Department of Mechanical Engineering, Excel Engineering College, Komarapalayam, Namakkal, 637303 Tamil Nadu, India
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Kalidasan V, Suresh D, Zulkifle N, Hwei YS, Kok Hoong L, Rajasuriar R, Theva Das K. Investigating D-Amino Acid Oxidase Expression and Interaction Network Analyses in Pathways Associated With Cellular Stress: Implications in the Biology of Aging. Bioinform Biol Insights 2024; 18:11779322241234772. [PMID: 38425413 PMCID: PMC10903195 DOI: 10.1177/11779322241234772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Accepted: 02/07/2024] [Indexed: 03/02/2024] Open
Abstract
D-amino acid oxidase (DAO) is a flavoenzyme that metabolizes D-amino acids by oxidative deamination, producing hydrogen peroxide (H2O2) as a by-product. The generation of intracellular H2O2 may alter the redox-homeostasis mechanism of cells and increase the oxidative stress levels in tissues, associated with the pathogenesis of age-related diseases and organ decline. This study investigates the effect of DAO knockdown using clustered regularly interspaced short palindromic repeats (CRISPR) through an in silico approach on its protein-protein interactions (PPIs) and their potential roles in the process of aging. The target sequence and guide RNA of DAO were designed using the CCTop database, PPI analysis using the Search Tool for the Retrieval of Interacting Genes/Proteins (STRING) database, Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) analyses, Reactome biological pathway, protein docking using GalaxyTongDock database, and structure analysis. The translated target sequence of DAO lies between amino acids 43 to 50. The 10 proteins that were predicted to interact with DAO are involved in peroxisome pathways such as acyl-coenzyme A oxidase 1 (ACOX1), alanine-glyoxylate and serine-pyruvate aminotransferase (AGXT), catalase (CAT), carnitine O-acetyltransferase (CRAT), glyceronephosphate O-acyltransferase (GNPAT), hydroxyacid oxidase 1 (HAO1), hydroxyacid oxidase 2 (HAO2), trans-L-3-hydroxyproline dehydratase (L3HYPDH), polyamine oxidase (PAOX), and pipecolic acid and sarcosine oxidase (PIPOX). In summary, DAO mutation would most likely reduce activity with its interacting proteins that generate H2O2. However, DAO mutation may result in peroxisomal disorders, and thus, alternative techniques should be considered for an in vivo approach.
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Affiliation(s)
- V Kalidasan
- Department of Biomedical Sciences, Advanced Medical and Dental Institute, Universiti Sains Malaysia, Kepala Batas, Malaysia
| | - Darshinie Suresh
- Department of Biomedical Sciences, Advanced Medical and Dental Institute, Universiti Sains Malaysia, Kepala Batas, Malaysia
- Department of Biological Sciences and Biotechnology, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, Bangi, Malaysia
| | - Nurulisa Zulkifle
- Department of Biomedical Sciences, Advanced Medical and Dental Institute, Universiti Sains Malaysia, Kepala Batas, Malaysia
| | - Yap Siew Hwei
- Department of Medicine, Faculty of Medicine, Universiti Malaya, Kuala Lumpur, Malaysia
| | - Leong Kok Hoong
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Universiti Malaya, Kuala Lumpur, Malaysia
| | - Reena Rajasuriar
- Department of Medicine, Faculty of Medicine, Universiti Malaya, Kuala Lumpur, Malaysia
- Centre of Excellence for Research in AIDS (CERiA), Faculty of Medicine, Universiti Malaya, Kuala Lumpur, Malaysia
| | - Kumitaa Theva Das
- Department of Biomedical Sciences, Advanced Medical and Dental Institute, Universiti Sains Malaysia, Kepala Batas, Malaysia
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Yap SH, Lee CS, Zulkifli ND, Suresh D, Hamase K, Das KT, Rajasuriar R, Leong KH. D-Amino acids differentially trigger an inflammatory environment in vitro. Amino Acids 2024; 56:6. [PMID: 38310167 PMCID: PMC10838247 DOI: 10.1007/s00726-023-03360-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Accepted: 12/20/2023] [Indexed: 02/05/2024]
Abstract
Studies in vivo have demonstrated that the accumulation of D-amino acids (D-AAs) is associated with age-related diseases and increased immune activation. However, the underlying mechanism(s) of these observations are not well defined. The metabolism of D-AAs by D-amino oxidase (DAO) produces hydrogen peroxide (H2O2), a reactive oxygen species involved in several physiological processes including immune response, cell differentiation, and proliferation. Excessive levels of H2O2 contribute to oxidative stress and eventual cell death, a characteristic of age-related pathology. Here, we explored the molecular mechanisms of D-serine (D-Ser) and D-alanine (D-Ala) in human liver cancer cells, HepG2, with a focus on the production of H2O2 the downstream secretion of pro-inflammatory cytokine and chemokine, and subsequent cell death. In HepG2 cells, we demonstrated that D-Ser decreased H2O2 production and induced concentration-dependent depolarization of mitochondrial membrane potential (MMP). This was associated with the upregulation of activated NF-кB, pro-inflammatory cytokine, TNF-α, and chemokine, IL-8 secretion, and subsequent apoptosis. Conversely, D-Ala-treated cells induced H2O2 production, and were also accompanied by the upregulation of activated NF-кB, TNF-α, and IL-8, but did not cause significant apoptosis. The present study confirms the role of both D-Ser and D-Ala in inducing inflammatory responses, but each via unique activation pathways. This response was associated with apoptotic cell death only with D-Ser. Further research is required to gain a better understanding of the mechanisms underlying D-AA-induced inflammation and its downstream consequences, especially in the context of aging given the wide detection of these entities in systemic circulation.
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Affiliation(s)
- Siew Hwei Yap
- Centre of Excellence for Research in AIDS (CERiA), Universiti Malaya, Kuala Lumpur, Malaysia
- Department of Medicine, Faculty of Medicine, Universiti Malaya, Kuala Lumpur, Malaysia
| | - Cheng Siang Lee
- Centre of Excellence for Research in AIDS (CERiA), Universiti Malaya, Kuala Lumpur, Malaysia
| | - Nur Diyana Zulkifli
- Department of Biomedical Sciences, Advanced Medical and Dental Institute, Universiti Sains Malaysia, Kepala Batas, Malaysia
| | - Darshinie Suresh
- Department of Biomedical Sciences, Advanced Medical and Dental Institute, Universiti Sains Malaysia, Kepala Batas, Malaysia
- Department of Biological Sciences and Biotechnology, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, Bangi, Malaysia
| | - Kenji Hamase
- Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka, Japan
| | - Kumitaa Theva Das
- Department of Biomedical Sciences, Advanced Medical and Dental Institute, Universiti Sains Malaysia, Kepala Batas, Malaysia
| | - Reena Rajasuriar
- Centre of Excellence for Research in AIDS (CERiA), Universiti Malaya, Kuala Lumpur, Malaysia
- Department of Medicine, Faculty of Medicine, Universiti Malaya, Kuala Lumpur, Malaysia
- Peter Doherty Institute for Infection and Immunity, Melbourne University, Melbourne, VIC, Australia
| | - Kok Hoong Leong
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Universiti Malaya, Kuala Lumpur, Malaysia.
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Hanumanthappa R, Venugopal DM, P C N, Shaikh A, B.M S, Heggannavar GB, Patil AA, Nanjaiah H, Suresh D, Kariduraganavar MY, Raghu SV, Devaraju KS. Polyvinylpyrrolidone-Capped Copper Oxide Nanoparticles-Anchored Pramipexole Attenuates the Rotenone-Induced Phenotypes in a Drosophila Parkinson's Disease Model. ACS Omega 2023; 8:47482-47495. [PMID: 38144104 PMCID: PMC10734007 DOI: 10.1021/acsomega.3c04312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/17/2023] [Revised: 11/06/2023] [Accepted: 11/15/2023] [Indexed: 12/26/2023]
Abstract
Parkinson's disease (PD) is a progressive, age-related neurodegenerative disease. The disease is characterized by the loss of dopaminergic neurons in the substantia nigra, pars compacta of the midbrain. Pramipexole (PPX) is a novel drug used for the treatment of PD. It has a high affinity for the dopamine (DA) D2 receptor subfamily and acts as a targeted mitochondrial antioxidant. It is less effective in the treatment of PD due to its short half-life, highly inconvenient dosing schedule, and long-term side effects. In recent years, PPX-loaded nanoformulations have been actively reported to overcome these limitations. In the current study, we focused on increasing the effectiveness of PPX by minimizing the dosing frequency and improving the treatment strategy for PD. Herein, we report the synthesis of biodegradable polyvinylpyrrolidone (PVP)-capped copper oxide nanoparticles (PVP-CuO NPs), followed by PPX anchoring on the surface of the PVP-CuO NPs (PPX-PVP-CuO NC), in a simple and inexpensive method. The newly formulated PPX-PVP-CuO NC complex was analyzed for its chemical and physical properties. The PPX-PVP-CuO NC was tested to protect against rotenone (RT)-induced toxicity in the Drosophila PD model. The in vivo studies using the RT-induced Drosophila PD model showed significant changes in negative geotaxis behavior and the level of DA and acetylcholinesterase. In addition, oxidative stress markers such as glutathione-S-transferase, total glutathione, thiobarbituric acid reactive species, and protein carbonyl content showed significant amelioration. The positive changes of PPX-PVP-CuO NC treatment in behavior, neurotransmitter level, and antioxidant level suggest its potential role in mitigating the PD phenotype. The formulation can be used for treatment or pharmacological intervention against PD.
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Affiliation(s)
- Ramesha Hanumanthappa
- Neuro-chemistry
Lab, Department of Biochemistry, Karnatak
University, Dharwad, Karnataka 580003, India
| | - Deepa Mugudthi Venugopal
- Neurogenetics
Lab, Department of Applied Zoology, Mangalore
University, Mangalagangothri, Karnataka 574199, India
| | - Nethravathi P C
- Department
of Studies and Research in Organic Chemistry, and Department of Chemistry,
University Collage of Science, Tumkur University, Tumkur, Karnataka 572103, India
| | - Ahesanulla Shaikh
- Neuro-chemistry
Lab, Department of Biochemistry, Karnatak
University, Dharwad, Karnataka 580003, India
| | - Siddaiah B.M
- Neuro-chemistry
Lab, Department of Biochemistry, Karnatak
University, Dharwad, Karnataka 580003, India
| | | | - Akshay A. Patil
- Department
of Botany, Karnataka Science College, Dharwad, Karnataka 580001, India
| | - Hemalatha Nanjaiah
- Neuro-chemistry
Lab, Department of Biochemistry, Karnatak
University, Dharwad, Karnataka 580003, India
- Department
of Microbiology and Immunology, University
of Maryland School of Medicine, 685 W. Baltimore St. HSFI-380, Baltimore, Maryland 21201, United States
| | - D. Suresh
- Department
of Studies and Research in Organic Chemistry, and Department of Chemistry,
University Collage of Science, Tumkur University, Tumkur, Karnataka 572103, India
| | | | - Shamprasad Varija Raghu
- Neurogenetics
Lab, Department of Applied Zoology, Mangalore
University, Mangalagangothri, Karnataka 574199, India
- Division
of Neuroscience, Yenepoya Research Centre (YRC), Yenepoya (Deemed to be University), Mangalore, Karnataka 575018, India
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Bhattacharyya S, Suresh D, Santhi G, Sandhu NS, Kuppusamy A, Kumar S. Relationship of Burnout and Extra-Curricular Activities among Dental Students: An Original Research. J Pharm Bioallied Sci 2023; 15:S204-S208. [PMID: 37654369 PMCID: PMC10466570 DOI: 10.4103/jpbs.jpbs_453_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Revised: 10/25/2022] [Accepted: 11/15/2022] [Indexed: 09/02/2023] Open
Abstract
Introduction "Burnout syndrome (BS)" is a work-associated condition which is frequently observed in medical professionals, especially students. Extra-curricular activities (ECAs) are one of the coping techniques that students employ to deal with stress and exhaustion. Goal The study's goal is to evaluate dental students' levels of burnout and how it correlates with their participation in ECAs. Materials and Procedures In South India, a dentistry school conducted a cross-sectional questionnaire research with its students. Both the regular and supplemental batches of students from the first year through the fifth year (internship) were included. The "Maslach Burnout Inventory Student Survey", which has 15 items in three areas-"Emotional Fatigue (EE), Cynicism (CY), & Professional Efficacy (PE)"-was used to assess burnout. A 5-point Likert scale was used to grade each response. Poisson log linear model and the Mann-Whitney U test were employed. The threshold for statistical significance was 5 out of 100. Results Four hundred participants were finalized after the criteria. Over 80% of the participants were women students as in accordance with the routine proportion of the dental students. The participants' average age was 22.1 ± 12 years. Burnout was seen in nearly 20% of subjects. Significant variation was seen for all the three domains of the burnout when they were compared against the ECA (P = 0.019(EE), 0.003(CY), and 0.005(PE)). Conclusion It is safe to say that among the participants, burnout is a common occurrence. There is a need for early detection of burnout in dental students and prompt, efficient management.
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Affiliation(s)
| | - D Suresh
- Department of Oral Medicine and Radiology, Government Dental College and Hospital, Kadapa, Andhra Pradesh, India
| | - G. Santhi
- Department of Periodontics, Lenora Institute of Dental Sciences, Rajahmundry, Andhra Pradesh, India
| | - Navjeet S. Sandhu
- BDS, Dr. Harvansh Singh Judge Institute of Dental Sciences, Panjab University, Chandigarh, India
| | - Anitha Kuppusamy
- Department of Oral Pathology, CKS Theja Institute of Dental Sciences and Research, Tirupathi, Andhra Pradesh, India
| | - Sandeep Kumar
- Department of Public Health Dentistry, Dental Institute, RIMS Ranchi, Jharkhand, India
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Kumar GJ, Suresh D, Kulkarni MM, Varma PK, Kohli AS, Ahmed MMM. Assessment of Odontometric and Osteologic Traits for Gender Determination in South Indians: An Original Research. J Pharm Bioallied Sci 2023; 15:S230-S234. [PMID: 37654260 PMCID: PMC10466515 DOI: 10.4103/jpbs.jpbs_460_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Revised: 10/22/2022] [Accepted: 11/11/2022] [Indexed: 09/02/2023] Open
Abstract
In forensic, odontologic, genetic, and anthropological aspects, odontometric and osteologic features have long been a valuable source. The goal of this research was to correlate both the osteologic and odontometric characteristics to determine the most accurate approach for determining gender. A retrospective study involving 1000 adults, with equal gender distribution, was carried out utilizing digital panoramic radiography. The archives were searched for radiographic images of the subjects that were procured for the various procedures that ranged from implantations to rehabilitations. The measurement process was carried out with Image-Pro. There was a noticeable gender difference in the mesodistal breadth, which ranged from 17 to 47. Asymmetry of the lower jaw was considerable in both genders, as was gender variance in osseologic characteristics including ramus diameter and gonial angle. The two groups of attributes exhibited a substantial positive predictive value and thus can be used indetermining gender.
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Affiliation(s)
- G. Jeevan Kumar
- Consultant Oral and Maxillofacial Surgeon, Tirupati, Andhra Pradesh, India
| | - D Suresh
- Department of Oral Medicine and Radiology, Government Dental College and Hospital, Kadapa, Andhra Pradesh, India
| | - Manisha M. Kulkarni
- Department of Prosthodontics, YCMM RDF’s Dental College, Ahmednagar, Maharashtra, India
| | - Praveen K. Varma
- Department of Orthodontics, Vishnu Dental College, Vishnupur, Bhimavaram, Andhra Pradesh, India
| | - Arshdeep Singh Kohli
- Senior Lecturer, Department of Oral and Maxillofacial Surgery, Luxmi Bai Institute of Dental Sciences and Hospital, Patiala, Punjab, India
| | - Mohammed M. M. Ahmed
- House Surgeon, H.K.D.E.T’S Dental College, Hospital And Research Institute, Humnabad, Karnataka, India
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Nethravathi PC, V Manjula M, Devaraja S, Suresh D. Ag and BiVO4 decorated reduced Graphene oxide: A potential nano hybrid material for photocatalytic, sensing and biomedical applications. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.109327] [Citation(s) in RCA: 4] [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: 12/13/2022]
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Nethravathi P, Suresh D. Silver-doped ZnO embedded reduced graphene oxide hybrid nanostructured composites for superior photocatalytic hydrogen generation, dye degradation, nitrite sensing and antioxidant activities. INORG CHEM COMMUN 2021. [DOI: 10.1016/j.inoche.2021.109051] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [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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Affiliation(s)
- R Sivayogana
- Department of Dermatology, Sri Ramachandra Institute of Higher Education and Research, Chennai, Tamil Nadu, India
| | - D Suresh
- Department of General Medicine, Stanley Medical College, Chennai, Tamil Nadu, India
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Rajkumar D, Rubini D, Sudharsan M, Suresh D, Nithyanand P. Novel thiazolinyl-picolinamide based palladium(II) complex-impregnated urinary catheters quench the virulence and disintegrate the biofilms of uropathogens. Biofouling 2020; 36:351-367. [PMID: 32401555 DOI: 10.1080/08927014.2020.1765159] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Revised: 04/22/2020] [Accepted: 04/29/2020] [Indexed: 06/11/2023]
Abstract
Pseudomonas aeruginosa and Serratia marcescens are prominent members belonging to the group of ESKAPE pathogens responsible for Urinary Tract Infections (UTI) and nosocomial infections. Both the pathogens regulate several virulence factors, including biofilm formation through quorum sensing (QS), an intercellular communication mechanism. The present study describes the anti-biofilm and QS quenching effect of thiazolinyl-picolinamide based palladium(II) complexes against P. aeruginosa and S. marcescens. Palladium(II) complexes showed quorum sensing inhibitory potential in inhibiting swarming motility behaviour, pyocyanin production and other QS mediated virulence factors in both P. aeruginosa and S. marcescens. In addition, the establishment of biofilms was prevented on palladium (II) coated catheters. Overall, the present study demonstrates that thiazolinyl-picolinamide based palladium (II) complexes will be a promising strategy to combat device-mediated UTI infections.
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Affiliation(s)
- Deeksha Rajkumar
- Biofilm Biology Laboratory, Centre for Research on Infectious Diseases (CRID), School of Chemical and Biotechnology, SASTRA Deemed University, Tirumalaisamudram, Tamil Nadu, India
| | - Durairajan Rubini
- Biofilm Biology Laboratory, Centre for Research on Infectious Diseases (CRID), School of Chemical and Biotechnology, SASTRA Deemed University, Tirumalaisamudram, Tamil Nadu, India
| | - M Sudharsan
- Department of Chemistry, School of Chemical and Biotechnology, SASTRA Deemed University, Thanjavur, Tamil Nadu, India
| | - D Suresh
- Department of Chemistry, School of Chemical and Biotechnology, SASTRA Deemed University, Thanjavur, Tamil Nadu, India
| | - Paramasivam Nithyanand
- Biofilm Biology Laboratory, Centre for Research on Infectious Diseases (CRID), School of Chemical and Biotechnology, SASTRA Deemed University, Tirumalaisamudram, Tamil Nadu, India
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Priya AH, Anupriya D, Muthukumar RS, Sreeja C, Kannan I, Suresh D. Quantitative analysis of the efficacy of Papanicolaou, acridine orange, and AgNOR in oral exfoliative smears smokers for detecting micronuclei – A cross-sectional comparative study. Saint Int Dent J 2020. [DOI: 10.4103/sidj.sidj_47_20] [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: 11/04/2022] Open
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Wales DP, Khan S, Suresh D, Ata A, Morris B. Factors associated with Tdap vaccination receipt during pregnancy: a cross-sectional study. Public Health 2019; 179:38-44. [PMID: 31726399 DOI: 10.1016/j.puhe.2019.10.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2019] [Revised: 07/30/2019] [Accepted: 10/01/2019] [Indexed: 11/16/2022]
Abstract
OBJECTIVE Pertussis morbidity and mortality disproportionately affect infants younger than 1 year, who constitute 70% of deaths from pertussis. In 2017, 43% of infants younger than 6 months diagnosed with pertussis were hospitalized. In 2012, the Advisory Committee on Immunization Practices recommended that all pregnant women should receive Tdap (tetanus-diphtheria-acellular pertussis) vaccine between 27- and 36-weeks gestation in an effort to reduce infant pertussis morbidity and mortality. However, Tdap vaccination rates among pregnant women remain far from robust. The aim of this study was to assess factors associated with maternal Tdap uptake to help providers identify best practices that can improve Tdap receipt and identify women at risk for not receiving this important vaccine. STUDY DESIGN A retrospective cross-sectional study. METHODS A review of prenatal and delivery records was performed on all maternal-infant dyads with infants older than 36 weeks gestation admitted to the term nursery at Albany Medical Center from January 1, 2016 to April 16, 2016. A chi-squared analysis using STATA®, version 14.1, was performed to determine if any variables were associated with Tdap uptake, with statistical significance defined as P < 0.05. Multivariate analysis was performed to identify the variables which had the greatest effect on Tdap receipt. RESULTS Tdap vaccine was received by 65.8% of pregnant women (n = 400) in the study; median gestational age of receipt was 30 weeks. Maternal influenza vaccine receipt, infant hepatitis B vaccine receipt, provider recommendation of Tdap vaccination, and on-site availability of Tdap vaccine were all positively associated with maternal Tdap receipt during pregnancy. CONCLUSION Receipt of Tdap by pregnant women was highest in those who had received a provider recommendation about its benefits and who also received influenza vaccine during pregnancy. Because women who received the influenza vaccine themselves and also consented to have their infants receive the hepatitis B vaccine had significantly higher uptake rates, encouraging vaccines usage and combating vaccine hesitancy in general can improve Tdap uptake rates. A small, but statistically significant association with receipt of assisted reproductive technologies was also seen, meriting future research.
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Affiliation(s)
- D P Wales
- Albany Medical Center, Division of Internal Medicine/Pediatrics, 1019 New Loudon Road, Cohoes, NY, 12047, USA.
| | - S Khan
- Albany Medical College, 47 New Scotland Avenue, Albany, NY, 12208, USA.
| | - D Suresh
- Albany Medical College, 47 New Scotland Avenue, Albany, NY, 12208, USA.
| | - A Ata
- Albany Medical Center, Department of Surgery, 50 New Scotland Avenue, Albany, NY, 12208, USA.
| | - B Morris
- Albany Medical Center, Department of Obstetrics & Gynecology, 391 Myrtle Avenue, Albany, NY, 12208, USA.
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Rodrigues AI, Figueira CA, Gomes CSB, Suresh D, Ferreira B, Di Paolo RE, Pereira DDS, Dias FB, Calhorda MJ, Morgado J, Maçanita AL, Gomes PT. Boron complexes of aromatic 5-substituted iminopyrrolyl ligands: synthesis, structure, and luminescence properties. Dalton Trans 2019; 48:13337-13352. [PMID: 31429840 DOI: 10.1039/c9dt02718a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
A group of new mononuclear boron chelate compounds [BPh2{κ2N,N'-5-R-NC4H2-2-C(H)[double bond, length as m-dash]N-Ar}] (R = Ar = C6H57; R = C6H5, Ar = 2,6-iPr2C6H38; R = Anthracen-9-yl (Anthr), Ar = C6H59; R = Anthr, Ar = 2,6-iPr2C6H310) were synthesized via the reaction of B(C6H5)3 with the corresponding 5-substituted 2-(N-arylformimino)pyrrole ligand precursors 3-6. These complexes were prepared in order to evaluate the luminescence potential derived from the substitution of the position 5 of the pyrrolyl ring with an aromatic group. Compounds 7-10 were photophysically characterized in solution and in the solid state. The 5-phenyl-2-iminopyrrolyl-BPh2 complexes 7 and 8 are blue emitters and have enhanced photoluminescence quantum yields in the solid state (ΦPL) up to 0.95, whereas the 5-anthracenyl derivatives 9 and 10 have green-bluish fluorescence and a ΦPL of 0.49 and 0.24, respectively. DFT and TDDFT studies were performed, considering the effect of solvent and dispersion, in order to show how the geometries of compounds 7-10 changed from the ground to the excited state, to assign electronic transitions, and to rationalize the observed luminescence. These materials were applied in organic light-emitting diodes (OLEDs), with various device structures, the best showing an external quantum efficiency of 2.75% together with a high luminance of 23 530 cd m-2.
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Affiliation(s)
- Ana I Rodrigues
- Centro de Química Estrutural, Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal.
| | - Cláudia A Figueira
- Centro de Química Estrutural, Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal.
| | - Clara S B Gomes
- Centro de Química Estrutural, Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal.
| | - D Suresh
- Centro de Química Estrutural, Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal. and School of Chemical and Biotechnology, SASTRA University, Thanjavur - 613 401, India
| | - Bruno Ferreira
- Centro de Química Estrutural, Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal.
| | - Roberto E Di Paolo
- Centro de Química Estrutural, Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal.
| | | | - Fernando B Dias
- Department of Physics, Durham University, South Road, Durham DH1 3LE, UK
| | - Maria José Calhorda
- Centro de Química e Bioquímica and BioISI -Biosystems & Integrative Sciences Institute, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, Ed. C8, 1749-016 Lisboa, Portugal
| | - Jorge Morgado
- Instituto de Telecomunicações, Av. Rovisco Pais, 1049-001 Lisboa, Portugal and Department of Bioengineering, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
| | - António L Maçanita
- Centro de Química Estrutural, Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal.
| | - Pedro T Gomes
- Centro de Química Estrutural, Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal.
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15
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Mukherjee S, Suresh D, Upendran A, Kannan R. Inhibition of PDE4 sensitizes drug resistant NSCLC to TKI therapy. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz029.009] [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: 11/13/2022] Open
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16
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Sudharsan M, Suresh D. Synthesis and palladium(II) metal chemistry of thiazoline/imidazoline derived ligands: An efficient catalyst for cross-coupling reactions of arylboronic acids with acid chlorides and aryl halides. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2018.09.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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17
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Srinivas C, Sudharsan M, Reddy GRK, Kumar PS, Amali AJ, Suresh D. Co/Co-N@Nanoporous Carbon Derived from ZIF-67: A Highly Sensitive and Selective Electrochemical Dopamine Sensor. ELECTROANAL 2018. [DOI: 10.1002/elan.201800391] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Chandrasekaran Srinivas
- Department of Chemistry, School of Chemical and Biotechnology; SASTRA Deemed University, Thanjavur; Tamil Nadu 613 401 India
| | - Murugesan Sudharsan
- Department of Chemistry, School of Chemical and Biotechnology; SASTRA Deemed University, Thanjavur; Tamil Nadu 613 401 India
| | - G. Rajendra Kumar Reddy
- Department of Chemistry, School of Chemical and Biotechnology; SASTRA Deemed University, Thanjavur; Tamil Nadu 613 401 India
| | - P. Suresh Kumar
- Department of Chemistry, School of Chemical and Biotechnology; SASTRA Deemed University, Thanjavur; Tamil Nadu 613 401 India
| | - Arlin Jose Amali
- Centre for Green Chemistry Processes; Madurai Kamaraj University; Madurai 625 021 India
| | - D. Suresh
- Department of Chemistry, School of Chemical and Biotechnology; SASTRA Deemed University, Thanjavur; Tamil Nadu 613 401 India
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18
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Naika HR, Lingaraju K, Manjunath K, Kumar D, Nagaraju G, Suresh D, Nagabhushana H. Green synthesis of CuO nanoparticles usingGloriosa superbaL. extract and their antibacterial activity. Journal of Taibah University for Science 2018. [DOI: 10.1016/j.jtusci.2014.04.006] [Citation(s) in RCA: 286] [Impact Index Per Article: 47.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- H. Raja Naika
- Department of Studies and Research in Environmental Science, Tumkur University, Tumkur 572103, Karnataka, India
| | - K. Lingaraju
- Department of Studies and Research in Environmental Science, Tumkur University, Tumkur 572103, Karnataka, India
| | - K. Manjunath
- Centre for Nano and Material Sciences, Jain University, Bangalore 562112, Karnataka, India
| | - Danith Kumar
- Department of Chemsitry, BMS Institute of Technology, Avalahalli, Bangalore 562164, Karnataka, India
| | - G. Nagaraju
- Department of Chemsitry, BMS Institute of Technology, Avalahalli, Bangalore 562164, Karnataka, India
| | - D. Suresh
- Department of Studies and Research in Chemistry, Tumkur University, Tumkur 572103, Karnataka, India
| | - H. Nagabhushana
- Prof. CNR Rao Center for Advanced Materials, Tumkur University, Tumkur 572103, Karnataka, India
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Mukherjee S, Suresh D, Zambre A, Upendran A, Kannan R. Dual inhibition of AXL and FN14 sensitizes cisplatin in resistant non-small cell lung carcinoma by inducing higher caspase 3 cleavage through FHIT upregulation, both in vivo and in vitro. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy047.033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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20
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Udayabhanu U, Muralikrishna S, Kishore B, Nagabhushana H, Suresh D, Sharma SC, Nagaraju G. One pot green synthesis of MnCO3–rGO composite hybrid superstructure: application to lithium ion battery and biosensor. NEW J CHEM 2017. [DOI: 10.1039/c7nj01781b] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
This is the first report on the synthesis of superstructures of MnCO3 and MnCO3–rGO using plant extracts via low-temperature hydrothermal method. The synthesized material shows good lithium-ion battery performance and can be used for the detection of dopamine.
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Affiliation(s)
| | - S. Muralikrishna
- Pilot Plant Development and Training Institute
- King Mongkut's University of Technology Thonburi
- Bangkok
- Thailand
| | - Brij Kishore
- Dept. of Inorganic and Physical Chemistry
- Indian Institute of Science
- Bengaluru
- India
| | - H. Nagabhushana
- Prof. CNR Rao Centre for Advanced Materials
- Tumkur University
- Tumakuru
- India
| | - D. Suresh
- Dept. of Studies and Research in Chemistry
- Tumkur University
- Tumakuru
- India
| | - S. C. Sharma
- Dept. of Mechanical Engineering
- Jain University
- Bengaluru
- India
- Avinashalingam Institute for Home Science and Higher Education for Women University
| | - G. Nagaraju
- Dept. of Chemistry
- Siddaganga Institute of Technology
- Tumakuru
- India
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21
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Yadav LSR, Archana B, Lingaraju K, Kavitha C, Suresh D, Nagabhushana H, Nagaraju G. Electrochemical Sensing, Photocatalytic and Biological Activities of ZnO Nanoparticles: Synthesis via Green Chemistry Route. Int J Nanosci 2016. [DOI: 10.1142/s0219581x16500137] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
In this paper, we have successfully synthesized ZnO nanoparticles (Nps) via solution combustion method using sugarcane juice as the novel fuel. The structure and morphology of the synthesized ZnO Nps have been analyzed using various analytical tools. The synthesized ZnO Nps exhibit excellent photocatalytic activity for the degradation of methylene blue dye, indicating that the ZnO Nps are potential photocatalytic semiconductor materials. The synthesized ZnO Nps also show good electrochemical sensing of dopamine. ZnO Nps exhibit significant bactericidal activity against Klebsiella aerogenes, Pseudomonas aeruginosa, Eschesichia coli and Staphylococcus aureus using agar well diffusion method. Furthermore, the ZnO Nps show good antioxidant activity by potentially scavenging 1-diphenyl-2-picrylhydrazyl (DPPH) radicals. The above studies clearly demonstrate versatile applications of ZnO synthesized by simple eco-friendly route.
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Affiliation(s)
- L. S. Reddy Yadav
- Department of Chemistry, BMS Institute of Technology, Bangalore-560 064, India
- Department of Chemistry, Siddaganga Institute of Technology, Tumkur-572 103, India
| | - B. Archana
- Department of Chemistry, M.S. Ramaiah Institute of Technology, Bangalore-560 012, India
| | - K. Lingaraju
- Department of Environmental Science, Tumkur University, Tumkur-572 103, India
| | - C. Kavitha
- Department of Chemistry, BMS Institute of Technology, Bangalore-560 064, India
| | - D. Suresh
- Department of Chemistry, Tumkur University, Tumkur-572 103, India
| | - H. Nagabhushana
- CNR Rao Center for Advanced Materials, Tumkur University, Tumkur-572 103, India
| | - G. Nagaraju
- Department of Chemistry, Siddaganga Institute of Technology, Tumkur-572 103, India
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22
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Madan HR, Sharma SC, Suresh D, Vidya YS, Nagabhushana H, Rajanaik H, Anantharaju KS, Prashantha SC, Sadananda Maiya P. Facile green fabrication of nanostructure ZnO plates, bullets, flower, prismatic tip, closed pine cone: Their antibacterial, antioxidant, photoluminescent and photocatalytic properties. Spectrochim Acta A Mol Biomol Spectrosc 2016; 152:404-16. [PMID: 26241826 DOI: 10.1016/j.saa.2015.07.067] [Citation(s) in RCA: 81] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2014] [Revised: 07/12/2015] [Accepted: 07/13/2015] [Indexed: 05/27/2023]
Abstract
Green synthesis of multifunctional Zinc oxide nanoparticles (NPs) with a variety of morphologies were achieved by low temperature solution combustion route employing neem (Azadirachta indica) extract as fuel. The nanoparticles were characterized by PXRD, FTIR, XPS, Raman and UV-Visible spectroscopic studies. The Morphologies were studied by SEM and TEM analysis. The NPs were subjected for photoluminescence, photocatalytic, antibacterial and antioxidant activity studies. PXRD pattern confirmed the hexagonal wurtzite structure of the product. SEM images indicated the transformation of mushroom like hexagonal disks to bullets, buds, cones, bundles and closed pine cone structured NPs with increase in the concentration of neem extract in reaction mixture. The NPs exhibited prominent green emission due to the presence of intrinsic defect centers. The as-formed bullet shaped ZnO with 4ml of neem extract was found to decolorize Methylene blue (MB) under Sunlight and UV light irradiation. The antibacterial studies indicated that ZnO NPs of concentration 500, 750 and 1000μg resulted in significant antibacterial activity on Klebsiella aerogenes and Staphylococcus aureus but not against Escherichia coli and Pseudomonas aeruginosa in agar well diffusion method. Further, ZnO NPs exhibited significant antioxidant activity against scavenging DPPH free radicals. The current investigation demonstrated green engineering method for the synthesis of multifunctional ZnO NPs with interesting morphologies using neem extract.
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Affiliation(s)
- H R Madan
- Department of Electronics, Tumkur University, Tumkur 572 103, India
| | - S C Sharma
- Dayananda Sagar University, Shavige Malleshwara Hills, Kumaraswamy layout, Bangalore 560078, Karnataka, India
| | - D Suresh
- Department of Studies & Research in Chemistry, Tumkur University, Tumkur 572 103, India
| | - Y S Vidya
- Department of Physics, Lal Bahadur Shastry Government First Grade College, Bangalore 560 032, India.
| | - H Nagabhushana
- Prof. C.N.R. Rao Centre for Advanced Materials Research, Tumkur University, Tumkur 572 103, India.
| | - H Rajanaik
- Department of Studies and Research in Environmental Science, Tumkur University, Tumkur 572 103, India
| | - K S Anantharaju
- Department of Chemistry, Dayananda Sagar College of Engineering, Shavige Malleshwara Hills, Kumaraswamy layout, Bangalore 560078, Karnataka, India.
| | - S C Prashantha
- Department of Science, East West Institute of Technology, Bangalore 560 091, India
| | - P Sadananda Maiya
- Dr. P. Sadananda Maiya Center for Food Science Research, 4th Block, Jayanagara, Bangalore 560 011, India
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23
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Suresh D, Ferreira B, Lopes PS, Gomes CSB, Krishnamoorthy P, Charas A, Vila-Viçosa D, Morgado J, Calhorda MJ, Maçanita AL, Gomes PT. Boron complexes of aromatic ring fused iminopyrrolyl ligands: synthesis, structure, and luminescence properties. Dalton Trans 2016; 45:15603-15620. [DOI: 10.1039/c6dt02771g] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
New fluorescent aromatic ring-fused 2-iminopyrrolyl diphenyl boron complexes are emitters in the range blue to orange.
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24
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Li Z, Beeram SR, Bi C, Suresh D, Zheng X, Hage DS. High-Performance Affinity Chromatography: Applications in Drug-Protein Binding Studies and Personalized Medicine. Adv Protein Chem Struct Biol 2015; 102:1-39. [PMID: 26827600 DOI: 10.1016/bs.apcsb.2015.09.007] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The binding of drugs with proteins and other agents in serum is of interest in personalized medicine because this process can affect the dosage and action of drugs. The extent of this binding may also vary with a given disease state. These interactions may involve serum proteins, such as human serum albumin or α1-acid glycoprotein, or other agents, such as lipoproteins. High-performance affinity chromatography (HPAC) is a tool that has received increasing interest as a means for studying these interactions. This review discusses the general principles of HPAC and the various approaches that have been used in this technique to examine drug-protein binding and in work related to personalized medicine. These approaches include frontal analysis and zonal elution, as well as peak decay analysis, ultrafast affinity extraction, and chromatographic immunoassays. The operation of each method is described and examples of applications for these techniques are provided. The type of information that can be obtained by these methods is also discussed, as related to the analysis of drug-protein binding and the study of clinical or pharmaceutical samples.
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Affiliation(s)
- Zhao Li
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
| | - Sandya R Beeram
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
| | - Cong Bi
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
| | - D Suresh
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
| | - Xiwei Zheng
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
| | - David S Hage
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, Nebraska, USA.
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25
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Anguizola J, Debolt E, Suresh D, Hage DS. Chromatographic analysis of the effects of fatty acids and glycation on binding by probes for Sudlow sites I and II to human serum albumin. J Chromatogr B Analyt Technol Biomed Life Sci 2015; 1021:175-181. [PMID: 26468085 DOI: 10.1016/j.jchromb.2015.09.041] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2015] [Revised: 09/24/2015] [Accepted: 09/29/2015] [Indexed: 12/01/2022]
Abstract
The primary endogenous ligands of human serum albumin (HSA) are non-esterified fatty acids, with 0.1-2mol of fatty acids normally being bound to HSA. In type II diabetes, fatty acid levels in serum are often elevated, and the presence of high glucose results in an increase in the non-enzymatic glycation of HSA. High-performance affinity chromatography (HPAC) was used to examine the combined effects of glycation and the presence of long chain fatty acids on the binding of HSA with R-warfarin and l-tryptophan (i.e., probes for Sudlow sites I and II, the major sites for drugs on this protein). Zonal elution competition studies were used to examine the interactions of myristic acid, palmitic acid and stearic acid with these probes on HSA. It was found that all these fatty acids had direct competition with R-warfarin at Sudlow site I of normal HSA and glycated HSA, with the glycated HSA typically having stronger binding for the fatty acids at this site. At Sudlow site II, direct competition was observed for all the fatty acids with l-tryptophan when using normal HSA, while glycated HSA gave no competition or positive allosteric interactions between these fatty acids and l-tryptophan. These data indicated that glycation can alter the interactions of drugs and fatty acids at specific binding sites on HSA. The results of this study should lead to a better understanding of how these interactions may change during diabetes and demonstrate how HPAC can be used to examine drug/solute-protein interactions in complex systems.
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Affiliation(s)
- Jeanethe Anguizola
- Chemistry Department, University of Nebraska, Lincoln, NE 68588-0304, USA
| | - Erin Debolt
- Chemistry Department, University of Nebraska, Lincoln, NE 68588-0304, USA
| | - D Suresh
- Home Department: Department of Chemistry, Tumkur University, Tumkur, Karnataka 572103, India
| | - David S Hage
- Chemistry Department, University of Nebraska, Lincoln, NE 68588-0304, USA.
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Suresh D, Gomes CSB, Lopes PS, Figueira CA, Ferreira B, Gomes PT, Di Paolo RE, Maçanita AL, Duarte MT, Charas A, Morgado J, Vila-Viçosa D, Calhorda MJ. Luminescent Di- and Trinuclear Boron Complexes Based on Aromatic Iminopyrrolyl Spacer Ligands: Synthesis, Characterization, and Application in OLEDs. Chemistry 2015; 21:9133-49. [DOI: 10.1002/chem.201500109] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2015] [Indexed: 11/05/2022]
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Suresh D, Shobharani RM, Nethravathi PC, Pavan Kumar MA, Nagabhushana H, Sharma SC. Artocarpus gomezianus aided green synthesis of ZnO nanoparticles: luminescence, photocatalytic and antioxidant properties. Spectrochim Acta A Mol Biomol Spectrosc 2015; 141:128-134. [PMID: 25668693 DOI: 10.1016/j.saa.2015.01.048] [Citation(s) in RCA: 76] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2014] [Revised: 12/31/2014] [Accepted: 01/14/2015] [Indexed: 06/04/2023]
Abstract
We report green synthesis of multifunctional ZnO nanoparticles (NPs) using Artocarpus gomezianus (AG) extract as fuel by solution combustion synthesis. The formation of NPs was confirmed by powder XRD, SEM, TEM and UV-Visible studies. The NPs were subjected for photoluminescence, photodegradative and antioxidant studies. XRD data reveals that the ZnO NPs possess wurtzite structure. UV-Visible spectrum shows absorbance maximum at 370 nm which corresponds to the energy band gap of 3.3 eV. Morphology studies indicate the highly porous nature of the NPs. PL spectra of NPs found to display very interesting blue, green and red emissions upon excitation at 325 nm. The NPs exhibit potential photocatalytic activity towards the degradation of methylene blue (MB) dye upon exposure to sun light and UV light. ZnO NPs found to have considerable antioxidant activity against DPPH (2,2-diphenyl-1-picrylhydrazyl) free radicals. The study successfully demonstrates a simple and eco-friendly method for the synthesis of efficient multifunctional ZnO nanoparticles using green synthetic approach.
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Affiliation(s)
- D Suresh
- Department of Studies and Research in Chemistry, Tumkur University, Tumkur 572 103, Karnataka, India.
| | - R M Shobharani
- Department of Studies and Research in Chemistry, Tumkur University, Tumkur 572 103, Karnataka, India
| | - P C Nethravathi
- Department of Studies and Research in Chemistry, Tumkur University, Tumkur 572 103, Karnataka, India
| | - M A Pavan Kumar
- Department of Studies and Research in Biochemistry, Tumkur University, Tumkur 572 103, Karnataka, India
| | - H Nagabhushana
- Prof. C.N.R. Rao Centre for Advanced Materials, Tumkur University, Tumkur 572 103, Karnataka, India
| | - S C Sharma
- Chhattisgarh Swami Vivekanand Technical University, Bhilai 490 009, Chhattisgarh, India; Academic Mentor and Honorary Professor of Eminence, Department of Mechanical Engineering, Siddaganga Institute of Technology, Tumkur 572 103, Karnataka, India
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Suresh D, Nethravathi PC, Lingaraju K, Rajanaika H, Sharma SC, Nagabhushana H. EGCG assisted green synthesis of ZnO nanopowders: Photodegradative, antimicrobial and antioxidant activities. Spectrochim Acta A Mol Biomol Spectrosc 2015; 136 Pt C:1467-1474. [PMID: 25459708 DOI: 10.1016/j.saa.2014.10.038] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2014] [Revised: 09/13/2014] [Accepted: 10/13/2014] [Indexed: 06/04/2023]
Abstract
Zinc oxide nanopowders were synthesized by solution combustion method using Epigallocatechin gallate (EGCG) a tea catechin as fuel. The structure and morphology of the product was characterized by Powder X-ray Diffraction, Scanning Electron Microscopy, photoluminescence and UV-Visible spectroscopy. The nanopowders (Nps) were subjected to photocatalytic and biological activities such as antimicrobial and antioxidant studies. PXRD patterns demonstrate that the formed product belongs to hexagonal wurtzite system. SEM images show that the particles are agglomerated to form sponge like structure and the average crystallite sizes were found to be ∼10-20nm. PL spectra exhibit broad and strong peak at 590nm due to the Zn-vacancies, and O-vacancies. The prepared ZnO Nps exhibit excellent photocatalytic activity for the photodegradation of malachite green (MG) and methylene blue (MB) indicating that the ZnO NPs are potential photocatalytic semiconductor materials. ZnO NPs exhibit significant bactericidal activity against Klebsiella aerogenes, Pseudomonas aeruginosa, Escherichia coli and Staphylococcus aureus using the agar well diffusion method. Furthermore, the ZnO nano powders show good antioxidant activity by potentially scavenging DPPH radicals. The study successfully demonstrates synthesis of ZnO NPs by simple ecofriendly route employing EGCG as fuel that exhibit superior photodegradative, antibacterial and antioxidant activities.
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Affiliation(s)
- D Suresh
- Department of Studies and Research in Chemistry, Tumkur University, Tumkur, Karnataka 572 103, India.
| | - P C Nethravathi
- Department of Studies and Research in Chemistry, Tumkur University, Tumkur, Karnataka 572 103, India
| | - K Lingaraju
- Department of Studies and Research in Environmental Science, Tumkur University, Tumkur, Karnataka 572 103, India
| | - H Rajanaika
- Department of Studies and Research in Environmental Science, Tumkur University, Tumkur, Karnataka 572 103, India
| | - S C Sharma
- Chattisgarh Swami Vivekanand Technical University, Bhilai, Chattisgarh, India
| | - H Nagabhushana
- Prof. C.N.R. Rao Centre for Advanced Materials, Tumkur University, Tumkur, Karnataka 572 103, India
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Purushothaman N, Newmaster SG, Ragupathy S, Stalin N, Suresh D, Arunraj DR, Gnanasekaran G, Vassou SL, Narasimhan D, Parani M. A tiered barcode authentication tool to differentiate medicinal Cassia species in India. Genet Mol Res 2014; 13:2959-68. [PMID: 24782130 DOI: 10.4238/2014.april.16.4] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
DNA barcoding is a desirable tool for medicinal product authentication. DNA barcoding is a method for species identification using short DNA sequences that are conserved within species, but variable between species. Unlike animals, there is no single universal DNA barcode locus for plants. Coding markers, matK and rbcL, and noncoding markers, trnH-psbA (chloroplast) and ITS2 (nuclear), have been reported to be suitable for the DNA barcoding of plants with varying degree of success. Sixty-four accessions from 20 species of the medicinal plant Cassia were collected, and analyzed for these 4 DNA barcoding markers. PCR amplification was 100% successful for all 4 markers, while intra-species divergence was 0 for all 4 Cassia species in which multiple accessions were studied. Assuming 1.0% divergence as the minimum requirement for discriminating 2 species, the 4 markers could only differentiate 15 to 65% of the species studied when used separately. Adding indels to the divergence increased the percentage of species discrimination by trnH-psbA to 90%. In 2-locus barcoding, while matK+rbcL (which is recommended by Consortium for the Barcoding of Life) discriminated 90% of the species, the other combinations of matK+ITS and rbcL+trnH-psbA showed 100% species discrimination. However, matK is plagued with primer issues. The combination of rbcL+trnH-psbA provided the most accurate (100% species ID) and efficient tiered DNA barcoding tool for the authentication of Cassia medicinal products.
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Affiliation(s)
- N Purushothaman
- Genomics Laboratory, Department of Genetic Engineering, SRM University, Chennai, India
| | - S G Newmaster
- Centre for Biodiversity Genomics, University of Guelph, Guelph, Ontario, Canada
| | - S Ragupathy
- Centre for Biodiversity Genomics, University of Guelph, Guelph, Ontario, Canada
| | - N Stalin
- Genomics Laboratory, Department of Genetic Engineering, SRM University, Chennai, India
| | - D Suresh
- Genomics Laboratory, Department of Genetic Engineering, SRM University, Chennai, India
| | - D R Arunraj
- Genomics Laboratory, Department of Genetic Engineering, SRM University, Chennai, India
| | - G Gnanasekaran
- Genomics Laboratory, Department of Genetic Engineering, SRM University, Chennai, India
| | - S L Vassou
- Genomics Laboratory, Department of Genetic Engineering, SRM University, Chennai, India
| | - D Narasimhan
- Centre for Floristic Research, Department of Plant Biology and Plant Biotechnology, Madras Christian College, Chennai, India
| | - M Parani
- Genomics Laboratory, Department of Genetic Engineering, SRM University, Chennai, India
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Suresh D, Lopes PS, Ferreira B, Figueira CA, Gomes CSB, Gomes PT, Di Paolo RE, Maçanita AL, Duarte MT, Charas A, Morgado J, Calhorda MJ. Tunable fluorophores based on 2-(N-arylimino)pyrrolyl chelates of diphenylboron: synthesis, structure, photophysical characterization, and application in OLEDs. Chemistry 2014; 20:4126-40. [PMID: 24634317 DOI: 10.1002/chem.201303607] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [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: 09/11/2013] [Indexed: 11/07/2022]
Abstract
Reactions of 2-(N-arylimino)pyrroles (HNC4H3C(H)=N-Ar) with triphenylboron (BPh3) in boiling toluene afford the respective highly emissive N,N'-boron chelate complexes, [BPh2 {κ(2)N,N'-NC4H3C(H)=N-Ar}] (Ar=C6H5 (12), 2,6-Me2-C6H3 (13), 2,6-iPr2-C6H3 (14), 4-OMe-C6H4 (15), 3,4-Me2-C6 H3 (16), 4-F-C6H4 (17), 4-NO2-C6H4 (18), 4-CN-C6H4 (19), 3,4,5-F3-C6H2 (20), and C6F5 (21)) in moderate to high yields. The photophysical properties of these new boron complexes largely depend on the substituents present on the aryl rings of their N-arylimino moieties. The complexes bearing electron-withdrawing aniline substituents 17-20 show more intense (e.g., ϕf =0.71 for Ar=4-CN-C6H4 (19) in THF), higher-energy (blue) fluorescent emission compared to those bearing electron-donating substituents, for which the emission is redshifted at the expense of lower quantum yields (ϕf=0.13 and 0.14 for Ar=4-OMe-C6H4 (15) and 3,4-Me2-C6H3 (16), respectively, in THF). The presence of substituents bulkier than a hydrogen atom at the 2,6-positions of the aryl groups strongly restricts rotation of this moiety towards coplanarity with the iminopyrrolyl ligand framework, inducing a shift in the emission to the violet region (λmax =410-465 nm) and a significant decrease in quantum yield (ϕf=0.005, 0.023, and 0.20 for Ar=2,6-Me2-C6H3 (13), 2,6-iPr2-C6H3 (14), and C6F5 (21), respectively, in THF), even when electron-withdrawing groups are also present. Density functional theory (DFT) and time-dependent DFT (TD-DFT) calculations have indicated that the excited singlet state has a planar aryliminopyrrolyl ligand, except when prevented by steric hindrance (ortho substituents). Calculated absorption maxima reproduce the experimental values, but the error is higher for the emission wavelengths. Organic light-emitting diodes (OLEDs) have been fabricated with the new boron complexes, with luminances of the order of 3000 cd m(-2) being achieved for a green-emitting device.
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Affiliation(s)
- D Suresh
- Centro de Química Estrutural, Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa (Portugal)
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Calhorda MJ, Suresh D, Gomes PT, Di Paolo RE, Maçanita AL. Photophysical properties of iminopyrrolyl boron complexes: A DFT interpretation. Dalton Trans 2012; 41:13210-7. [DOI: 10.1039/c2dt31104f] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Suresh D, Gomes CSB, Gomes PT, Di Paolo RE, Maçanita AL, Calhorda MJ, Charas A, Morgado J, Teresa Duarte M. Syntheses and photophysical properties of new iminopyrrolyl boron complexes and their application in efficient single-layer non-doped OLEDs prepared by spin coating. Dalton Trans 2012; 41:8502-5. [DOI: 10.1039/c2dt30487b] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Gomes CSB, Figueira CA, Lopes PS, Suresh D, Gomes PT, Duarte MT. Iminopyrrole derivatives containing electron-withdrawing substituents: the formation of dimers and supramolecular arrangements. Acta Crystallogr C 2011; 67:o315-8. [PMID: 21817800 DOI: 10.1107/s0108270111027491] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2011] [Accepted: 07/08/2011] [Indexed: 11/11/2022] Open
Abstract
The crystal structures of two p-substituted phenylformiminopyrrole derivatives, namely 2-[(4-fluorophenyl)iminomethyl]pyrrole, C(11)H(9)FN(2), (1), and 2-[(1H-pyrrol-2-ylmethylidene)amino]benzonitrile, C(12)H(9)N(3), (2), bear F and C[triple-bond]N electron-withdrawing groups, respectively. Both structures feature two independent molecules in the asymmetric unit forming dimers via N-H...N hydrogen bonds. In the case of (1), each dimer interacts with two other dimers via C-H...F contacts, thus forming one-dimensional chains in the b direction, whereas in the case of (2), a weak C-H...N interaction connects the dimers in one-dimensional chains in the (110) direction.
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Affiliation(s)
- Clara S B Gomes
- Centro de Química Estrutural, Departamento de Engenharia Química e Biológica, Instituto Superior Técnico, Universidade Técnica de Lisboa, Lisboa, Portugal
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Balakrishna MS, Suresh D, Mague JT. Cyclodiphosphazane appended with thioether functionality: Synthesis, transition metal chemistry and catalytic application in Suzuki–Miyaura cross-coupling reactions. Inorganica Chim Acta 2011. [DOI: 10.1016/j.ica.2011.02.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Balakrishna MS, Suresh D, Rai A, Mague JT, Panda D. Dinuclear Copper(I) Complexes Containing Cyclodiphosphazane Derivatives and Pyridyl Ligands: Synthesis, Structural Studies, and Antiproliferative Activity toward Human Cervical and Breast Cancer Cells. Inorg Chem 2010; 49:8790-801. [DOI: 10.1021/ic100944d] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
| | - D. Suresh
- Phosphorus Laboratory, Department of Chemistry
| | - Ankit Rai
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai 400 076, India
| | - Joel T. Mague
- Chemistry Department, Tulane University, New Orleans, Louisiana 70118
| | - Dulal Panda
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai 400 076, India
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Suresh D, Srinivasan K. Tissue distribution & elimination of capsaicin, piperine & curcumin following oral intake in rats. Indian J Med Res 2010; 131:682-691. [PMID: 20516541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2023] Open
Abstract
BACKGROUND & OBJECTIVES Curcumin, capsaicin and piperine--the bioactive compounds present in spices--turmeric (Curcuma longa), red pepper (Capsicum annuum) and black pepper (Piper nigrum) respectively, have a considerable portion of structural homology. Tissue distribution and elimination of these three structurally similar bioactive compounds was examined following their oral intake in rats. METHODS Separate sets of animals (150-160 g) were orally administered the three spice principles at dosages of 30 mg (capsaicin), 170 mg (piperine) and 500 mg (curcumin) / kg body weight. The tissue concentrations of administered spice compounds were determined by HPLC. RESULTS Maximum distribution of 24.4 per cent of administered capsaicin was seen at 1 h, while no intact capsaicin was detectable after 4 days. Absorption of capsaicin was about 94 per cent and very rapid relative to other two compounds. A maximum of 10.8 per cent of administered piperine was seen in tissues at 6 h. Absorption of the administered piperine was about 96 per cent. Curcumin concentration was maximum in the intestine at 1 h; maximum in blood at 6 h and remained at significantly higher level even at 24 h. About 63.5 per cent of the curcumin dose was absorbed. Only a small portion of the administered dose of capsaicin (< 0.1%) and curcumin (0.173 %) was excreted in urine, whereas piperine was not detectable in urine. Enhanced bioavailability of curcumin was evidenced when the same was orally administered concomitant with piperine. Intestinal absorption of curcumin was relatively higher when administered concomitantly with piperine, and it stayed significantly longer in the body tissues. Intact curcumin was detected in brain at 24, 48 and 96 h with a maximum at 48 h. CONCLUSIONS Considerable difference exists in the bioavailability of the three test compounds. Curcumin could be traced in the brain following its administration. Bioavailability of curcumin can be improved by co-administration with piperine.
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Affiliation(s)
- D Suresh
- Department of Biochemistry & Nutrition, Central Food Technological Research Institute (CSIR), Mysore, India
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Gomes CSB, Suresh D, Gomes PT, Veiros LF, Duarte MT, Nunes TG, Oliveira MC. Sodium complexes containing 2-iminopyrrolyl ligands: the influence of steric hindrance in the formation of coordination polymers. Dalton Trans 2010; 39:736-48. [PMID: 20066219 DOI: 10.1039/b905948b] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Clara S B Gomes
- Centro de Química Estrutural, Departamento de Engenharia Química e Biológica, Instituto Superior Técnico, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
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Sennik DK, Suresh D, Goodall E, Lane RJM. A case of diplopia and arm weakness. BMJ 2009; 339:b4555. [PMID: 19939896 DOI: 10.1136/bmj.b4555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- D K Sennik
- Ashford and St Peter's Hospitals NHS Trust, Chertsey.
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Mohanty S, Suresh D, Balakrishna MS, Mague JT. Phosphine free diamino-diol based palladium catalysts and their application in Suzuki–Miyaura cross-coupling reactions. J Organomet Chem 2009. [DOI: 10.1016/j.jorganchem.2009.02.019] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Samanta S, Swamy V, Suresh D, Rajkumar M, Rana B, Rana A, Chatterjee M. Protective effects of vanadium against DMH-induced genotoxicity and carcinogenesis in rat colon: Removal of O6-methylguanine DNA adducts, p53 expression, inducible nitric oxide synthase downregulation and apoptotic induction. Mutation Research/Genetic Toxicology and Environmental Mutagenesis 2008; 650:123-31. [DOI: 10.1016/j.mrgentox.2007.11.001] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2007] [Revised: 10/12/2007] [Accepted: 11/04/2007] [Indexed: 12/18/2022]
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42
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Suresh D, Balakrishna MS, Mague JT. Novel octanuclear copper(i) metallomacrocycles and their transformation into hexanuclear 2-dimensional grids of copper(i) coordination polymers containing cyclodiphosphazanes, [(μ-NtBuP)2(NC4H8X)2] (X = NMe, O). Dalton Trans 2008:3272-4. [DOI: 10.1039/b804311f] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Suresh D, Balakrishna MS, Rathinasamy K, Panda D, Mobin SM. Water-soluble cyclodiphosphazanes: synthesis, gold(i) metal complexes and their in vitro antitumor studies. Dalton Trans 2008:2812-4. [DOI: 10.1039/b804026p] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Suresh D, Balakrishna MS, Rathinasamy K, Panda D, Mague JT. Large-bite bis(phosphite) ligand containing mesocyclic thioether moieties: synthesis, reactivity, group 11 (CuI, AuI) metal complexes and anticancer activity studies on a human cervical cancer (HeLa) cell line. Dalton Trans 2008:2285-92. [DOI: 10.1039/b719904j] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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45
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Mohanty S, Suresh D, Balakrishna MS, Mague JT. An inexpensive and highly stable ligand 1,4-bis(2-hydroxy-3,5-di-tert-butylbenzyl)piperazine for Mizoroki–Heck and room temperature Suzuki–Miyaura cross-coupling reactions. Tetrahedron 2008. [DOI: 10.1016/j.tet.2007.10.081] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Suresh D, Srinivasan K. Studies on the in vitro absorption of spice principles – Curcumin, capsaicin and piperine in rat intestines. Food Chem Toxicol 2007; 45:1437-42. [PMID: 17524539 DOI: 10.1016/j.fct.2007.02.002] [Citation(s) in RCA: 90] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2005] [Revised: 07/17/2006] [Accepted: 02/06/2007] [Indexed: 11/30/2022]
Abstract
A comparative evaluation of the absorbability of three structurally similar and physiologically active spice principles in an in vitro system consisting of everted rat intestinal sacs was made. When everted sacs of rat intestines were incubated with 50-1000 microg of curcumin in 10 ml incubation medium, absorption of the spice principle was maximum at 100 microg concentration. The amount of absorbed curcumin present in the serosal fluid was negligible. This and the comparatively lower recovery of the original compound suggested that curcumin to some extent undergoes a modification during absorption. For similar concentrations of added piperine, about 44-63% of piperine disappeared from the mucosal side. Absorption of piperine which was maximum at 800 microg per 10 ml was about 63%. The absolute amounts of piperine absorbed in this in vitro system exceeded the amounts of curcumin. The absorbed piperine could be traced in both the serosal fluid and in the intestinal tissue, indicating that piperine did not undergo any metabolic change during the process of absorption. 7-12% of the absorbed piperine was found in the serosal fluid. When everted sacs of rat intestines were incubated with 10-500 microg of capsaicin, a maximum of 82-88% absorption could be seen in the lower concentrations, and the amount of absorbed capsaicin did not proportionately increase at higher concentrations. A relatively higher percentage of the absorbed capsaicin could be seen in the serosal fluid as compared to curcumin or piperine. When these spice active principles were associated with mixed micelles, their in vitro intestinal absorption was relatively higher. Curcumin absorption in everted intestinal sac increased from 48.7% to 56.1% when the same was present in micelles. In the case of capsaicin and piperine, increase in absorption was 27.8-44.4% and 43.4-57.4%, respectively, when they were present in micelles as compared to its native form.
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Affiliation(s)
- D Suresh
- Department of Biochemistry and Nutrition, Central Food Technological Research Institute, Mysore, Karnataka - 570 020, India
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Suresh D, Srinivasan K. Influence of curcumin, capsaicin, and piperine on the rat liver drug-metabolizing enzyme system in vivo and in vitro. Can J Physiol Pharmacol 2007; 84:1259-65. [PMID: 17487234 DOI: 10.1139/y06-074] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The effect of dietary supplementation of spice-active principles, curcumin (0.2%), capsaicin (0.015%), and piperine (0.02%) on the activities of the liver drug-metabolizing enzyme system was examined. All the 3 dietary spice principles significantly stimulated the activity of aryl hydroxylase. A synergistic action of dietary curcumin and capsaicin with respect to stimulating the activity of aryl hydroxylase was also evidenced when fed in combination. The activity of N-demethylase essentially remained unaffected by dietary curcumin, capsaicin, or their combination, but was significantly lowered as a result of piperine feeding. Uridine dinucleotide phosphate (UDP)-glucuronyl transferase activity was decreased by dietary piperine and the combination of curcumin and capsaicin. NADPH-cytochrome c reductase activity was significantly decreased by dietary piperine. The levels of hepatic microsomal cytochrome P450 and cytochrome b5 were not influenced by any of the dietary spice-active principles. These spice-active principles were also examined for their possible in vitro influence on the components of the hepatic drug-metabolizing enzyme system in rat liver microsomal preparation. Piperine significantly decreased the activity of liver microsomal aryl hydroxylase activity when included in the assay medium at 1 x 10(-6) mol/L, 1 x 10(-5) mol/L, and 1x 10(-4) mol/L level. Lowered activity of N-demethylase was observed in presence of capsaicin or piperine at 1 x 10(-6) mol/L in the assay medium. Hepatic microsomal glucuronyl transferase activity was significantly decreased in vitro by addition of capsaicin or piperine. Capsaicin and piperine brought about significant decrease in liver microsomal cytochrome P450 when included at 1 x 10(-6) mol/L and 1 x 10(-5) mol/L, the effect being much higher in the case of piperine. The results suggested that whereas the 3 spice principles have considerable similarity in structure, piperine is exceptional in its influence on the liver drug-metabolizing enzyme system. The study also indicated that a combination of curcumin and capsaicin does not produce any significant additive effect on the liver drug-metabolizing enzyme system.
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Affiliation(s)
- D Suresh
- Department of Biochemistry and Nutrition, Central Food Technological Research Institute, Mysore 570020, India
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Suresh D, Manjunatha H, Srinivasan K. Effect of heat processing of spices on the concentrations of their bioactive principles: Turmeric (Curcuma longa), red pepper (Capsicum annuum) and black pepper (Piper nigrum). J Food Compost Anal 2007. [DOI: 10.1016/j.jfca.2006.10.002] [Citation(s) in RCA: 102] [Impact Index Per Article: 6.0] [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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Shankarananth V, Balakrishnan N, Suresh D, Sureshpandian G, Edwin E, Sheeja E. Analgesic activity of methanol extract of Aegle marmelos leaves. Fitoterapia 2007; 78:258-9. [PMID: 17335994 DOI: 10.1016/j.fitote.2006.12.004] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2005] [Accepted: 12/07/2006] [Indexed: 11/17/2022]
Abstract
The methanol extract of leaves of Aegle marmelos at a dose level of 200 and 300 mg/kg showed significant analgesic activity on acetic acid-induced writhing and tail flick test in mice.
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Affiliation(s)
- V Shankarananth
- Mandsaur Institute of Pharmacy, Mandsaur 458001 (M.P), India.
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50
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Paulsamy S, Suresh D. Exotic flora of some grasslands of Nilgiris with their medicinal uses. Anc Sci Life 2007; 27:38-42. [PMID: 22557258 PMCID: PMC3330838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2007] [Accepted: 06/12/2007] [Indexed: 11/05/2022] Open
Abstract
In addition to the dominance of indigenous plant species, the grasslands of Nilgiris harbour a considerable number of exotic plants with sizeable number of individuals. In the present study in four major grasslands of Nilgiris, out of 12 exotic species present, 10 are recognized as medicinally important. The family, Asteraceae contributed a higher number of 6 medicinal species to the grassland community. The density of exotics in the studied grasslands is varied between 4 and 66/ha. In order to conserve the native species, the frequent harvesting of useful parts of exotics is suggested. In addition cultivation of these exotics in the degraded grasslands and other suitable habitats in Nilgiris may also reduce the pressure upon the native species and at the same time it will also meet the demand.
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Affiliation(s)
- S. Paulsamy
- Dept. of Botany, Kongunadu Arts and Science College, Coimbatore - 641 029, India
| | - D. Suresh
- Dept. of Botany, Kongunadu Arts and Science College, Coimbatore - 641 029, India
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