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Sundaram V, Ramanan RN, Selvaraj M, Ahemad N, Vijayaraghavan R, MacFarlane DR, Ooi CW. Probing the molecular interactions between cholinium-based ionic liquids and insulin aspart: A combined computational and experimental study. Int J Biol Macromol 2023; 253:126665. [PMID: 37689282 DOI: 10.1016/j.ijbiomac.2023.126665] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 08/29/2023] [Accepted: 08/31/2023] [Indexed: 09/11/2023]
Abstract
Despite extensive studies revealing the potential of cholinium-based ionic liquids (ILs) in protein stabilization, the nature of interaction between ILs' constituents and protein residues is not well understood. In this work, we used a combined computational and experimental approach to investigate the structural stability of a peptide hormone, insulin aspart (IA), in ILs containing a choline cation [Ch]+ and either dihydrogen phosphate ([Dhp]-) or acetate ([Ace]-) as anions. Although IA remained stable in both 1 M [Ch][Dhp] and 1 M [Ch][Ace], [Dhp]- exhibited a much stronger stabilization effect than [Ace]-. Both the hydrophilic ILs intensely hydrated IA and increased the number of water molecules in IA's solvation shell. Undeterred by the increased number of water molecules, the native state of IA's hydrophobic core was maintained in the presence of ILs. Importantly, our results reveal the importance of IL concentration in the medium which was critical to maintain a steady population of ions in the microenvironment of IA and to counteract the denaturing effect of water molecules. Through molecular docking, we confirm that the anions exert the dominant effect on the structure of IA, while [Ch]+ have the secondary influence. The computational results were validated using spectroscopic analyses (ultra-violet, fluorescence, and circular dichroism) along with dynamic light scattering measurements. The extended stability of IA at 30 °C for 28 days in 1 M [Ch][Dhp] and [Ch][Ace] demonstrated in this study reveals the possibility of stabilizing IA using cholinium-based ILs.
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Affiliation(s)
- Vidya Sundaram
- Chemical Engineering Department, School of Engineering, Monash University Malaysia, Jalan Lagoon Selatan, 47500 Bandar Sunway, Selangor, Malaysia
| | - Ramakrishnan Nagasundara Ramanan
- Chemical Engineering Department, School of Engineering, Monash University Malaysia, Jalan Lagoon Selatan, 47500 Bandar Sunway, Selangor, Malaysia; Arkema Thiochemicals Sdn Bhd, Oasis Ara Damansara, 47301 Petaling Jaya, Selangor, Malaysia
| | - Manikandan Selvaraj
- Chemical Engineering Department, School of Engineering, Monash University Malaysia, Jalan Lagoon Selatan, 47500 Bandar Sunway, Selangor, Malaysia; Department of Neuroscience, Mayo Clinic, Jacksonville, FL, USA
| | - Nafees Ahemad
- School of Pharmacy, Monash University Malaysia, Jalan Lagoon Selatan, 47500 Bandar Sunway, Selangor, Malaysia
| | - R Vijayaraghavan
- School of Chemistry, Faculty of Science, Monash University, Clayton, Victoria 3800, Australia
| | - Douglas R MacFarlane
- School of Chemistry, Faculty of Science, Monash University, Clayton, Victoria 3800, Australia
| | - Chien Wei Ooi
- Chemical Engineering Department, School of Engineering, Monash University Malaysia, Jalan Lagoon Selatan, 47500 Bandar Sunway, Selangor, Malaysia; Advanced Engineering Platform, Monash University Malaysia, Jalan Lagoon Selatan, 47500 Bandar Sunway, Selangor, Malaysia.
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Krishnaraj A, Bakbak E, Teoh H, Bhatt D, Quan A, Puar P, Lambotharan B, Kirubaharan A, Firoz I, Yanagawa B, Bari B, Kirubaharan R, Vijayaraghavan R, Demchuk A, Mancini G, Tanguay J, Tardif J, Voisine P, Leiter L, Verma S. TREATMENT IMPLICATIONS OF THE REDUCE-IT RESULTS TO PEOPLE OF SOUTH ASIAN (SA) DESCENT LIVING IN CANADA WITH KNOWN ATHEROSCLEROTIC CARDIOVASCULAR DISEASE(THE REDUCE-IT CANADA SA STUDY). Can J Cardiol 2022. [DOI: 10.1016/j.cjca.2022.08.205] [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: 11/25/2022] Open
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Liu L, Roessler K, Bilke S, Ding Y, Erlandson D, Fu Y, Hariharan B, Katz S, Lee J, Schulman C, Song F, Vijayaraghavan R, Wenz P, Xia E, Yan H, Zhu Y, Zhao C, Dockter J, Pawlowski T, Day J. 925P Analytical performance of a next-generation sequencing (NGS) assay kit for assessing homologous recombination deficiency (HRD) from solid tumor samples. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.07.1050] [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: 11/27/2022] Open
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Sundaram V, Ramanan RN, Selvaraj M, Vijayaraghavan R, MacFarlane DR, Ooi CW. Enhanced structural stability of insulin aspart in cholinium aminoate ionic liquids. Int J Biol Macromol 2022; 208:544-552. [PMID: 35331796 DOI: 10.1016/j.ijbiomac.2022.03.100] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2022] [Revised: 03/16/2022] [Accepted: 03/16/2022] [Indexed: 12/14/2022]
Abstract
Cholinium aminoates [Ch][AA] have gained tremendous interest as a promising ionic liquid medium for the synthesis and storage of proteins. However, high alkalinity of [Ch][AA] limits its usage with pH-sensitive proteins. Here, we probed the structure, stability, and interactions of a highly unstable therapeutic protein, insulin aspart (IA), in a range of buffered [Ch][AA] (b-[Ch][AA]) using a combination of biophysical tools and in silico pipeline including ultraviolet-visible, fluorescence, and circular dichroism spectroscopies, dynamic light scattering measurements and molecular docking. b-[Ch][AA] used in the study differed in concentrations and their anionic counterparts. We reveal information on ion and residue specific solvent-protein interactions, demonstrating that the structural stability of IA was enhanced by a buffered cholinium prolinate. In comparison to the glycinate and alaninate anions, the hydrophilic prolinate anions established more hydrogen bonds with the residues of IA and provided a less polar environment that favours the preservation of IA in its active monomeric form, opening new opportunities for utilizing [Ch][AA] as storage medium.
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Affiliation(s)
- Vidya Sundaram
- Chemical Engineering Discipline, School of Engineering, Monash University Malaysia, Jalan Lagoon Selatan, 47500 Bandar Sunway, Selangor, Malaysia; Biological Enginerring Discipline, Indian Institute of Technology Gandhinagar, Palaj, Gandhinagar-382055, Gujarat, India
| | - Ramakrishnan Nagasundara Ramanan
- Chemical Engineering Discipline, School of Engineering, Monash University Malaysia, Jalan Lagoon Selatan, 47500 Bandar Sunway, Selangor, Malaysia
| | - Manikandan Selvaraj
- Chemical Engineering Discipline, School of Engineering, Monash University Malaysia, Jalan Lagoon Selatan, 47500 Bandar Sunway, Selangor, Malaysia
| | - R Vijayaraghavan
- School of Chemistry, Faculty of Science, Monash University, Clayton, Victoria 3800, Australia
| | - Douglas R MacFarlane
- School of Chemistry, Faculty of Science, Monash University, Clayton, Victoria 3800, Australia
| | - Chien Wei Ooi
- Chemical Engineering Discipline, School of Engineering, Monash University Malaysia, Jalan Lagoon Selatan, 47500 Bandar Sunway, Selangor, Malaysia; Advanced Engineering Platform, Monash University Malaysia, Jalan Lagoon Selatan, 47500 Bandar Sunway, Selangor, Malaysia
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Saranya CR, Vijayaraghavan R, Sathya Narayana Sharma K. Design of double sampling inspection plans for life tests under time censoring based on Pareto type IV distribution. Sci Rep 2022; 12:7953. [PMID: 35562578 PMCID: PMC9106667 DOI: 10.1038/s41598-022-11834-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Accepted: 04/18/2022] [Indexed: 11/25/2022] Open
Abstract
Sampling inspection plans for life tests, called reliability sampling plans, are generally employed to determine the acceptance or non-acceptance of the lot(s) of finished products by performing tests on the sampled items, measuring the lifetime of the items and observing the number of failures of items. Lifetime of individual items is a prime quality characteristic that can be treated as a continuous random variable and can be modeled by an appropriate probability distribution. In this article, double sampling plans for life tests under time censoring with a provision to draw two random samples and to admit a maximum of one failure in the combined samples are formulated assuming that the lifetime random variable follows a Pareto type IV distribution. A methodical procedure for the selection of the plan parameters using reliable life criterion with the desired discrimination protecting the interests of the producer and the consumer in terms of the acceptable reliable life and unacceptable reliable life is evolved. The operating ratio is used as a measure of discrimination in designing the proposed reliability sampling plans.
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Affiliation(s)
- C R Saranya
- Department of Statistics, KSMDB College, Sasthamcotta, Kerala, India
| | - R Vijayaraghavan
- Department of Statistics, Bharathiar University, Coimbatore, 641 046, India
| | - K Sathya Narayana Sharma
- Department of Mathematics, School of Advanced Sciences, Vellore Institute of Technology, Vellore, Tamil Nadu, 632014, India.
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Mathevan Pillai D, Vijayaraghavan R, Kumar R, Chaithanya Prasad K, Pandya K, Nagappan N. Spectrophotometric Analysis of Fluoride Concentration in Dentifrices for Children in India. J Pharm Bioall Sci 2022; 14:S943-S946. [PMID: 36110806 PMCID: PMC9469247 DOI: 10.4103/jpbs.jpbs_847_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Accepted: 12/23/2021] [Indexed: 11/04/2022] Open
Abstract
Background: Aim: Settings and Design: Methods: Results: Conclusions:
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Senthil Eagappan AR, Rajaraman G, Bhavani S, Vijayaraghavan R, Harishma S, Jeyapreetha P. Comparative evaluation of fracture resistance of fiber-reinforced composite and alkasite restoration in class I cavity. Contemp Clin Dent 2022; 13:56-60. [PMID: 35466303 PMCID: PMC9030303 DOI: 10.4103/ccd.ccd_707_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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 09/26/2020] [Accepted: 10/21/2020] [Indexed: 11/04/2022] Open
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Padmapriya D, Archana R, Sharma N, Vijayaraghavan R. Effects of Vitamin D3 Supplementation in Male Reproductive Function: A Double-Blinded Randomized Controlled Trial. CURR TOP NUTRACEUT R 2021. [DOI: 10.37290/ctnr2641-452x.20:334-339] [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] [Indexed: 11/24/2022]
Abstract
Vitamin D3 supplementation has been shown to be beneficial in improving male reproductive function in some but not all studies. Hence, the benefits of vitamin D3 supplementation on seminal parameters of male infertility remain inconclusive. The current study aims to evaluate the effect of vitamin D3 supplementation on male reproductive function. A double blinded randomized controlled trial was conducted among 120 infertile men. They were randomly assigned into vitamin D and placebo groups. Vitamin D3 (cholecalciferol) supplementation (2,000 IU) was given orally twice daily, and the placebo group received oral vitamin B complex supplementation twice daily. Basic spermogram parameters and hormonal assays including follicle stimulating hormone, luteinizing hormone, and thyroid hormone profile (free T3, free T4, and thyroid stimulating hormone) were performed before and after intervention. Two-way analysis of variance showed statistically significant difference (P < 0.001) with reference to progressive motility, total motility, sperm volume, and total sperm number. There was no statistical difference in the hormonal assay parameters of follicle stimulating hormone and luteinizing hormone; however, the thyroid profile (free T3) alone showed significance between the groups. The present study revealed the beneficial effect of vitamin D3 oral supplementation on spermogram parameters. However, intake of vitamin D3 did not change the levels of follicle stimulating hormone and luteinizing hormone among subfertile men.
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Affiliation(s)
- D. Padmapriya
- Department of Nursing, Saveetha College of Nursing, Saveetha Institute of Medical and Technical Sciences, Chennai, Tamil Nadu
| | - R. Archana
- Department of Physiology, Saveetha Medical College, Saveetha Institute of Medical and Technical Sciences, Chennai, Tamil Nadu
| | - Nidhi Sharma
- Department of Obstetrics and Gynaecology, Saveetha Medical College, Saveetha Institute of Medical and Technical Sciences, Chennai, Tamil Nadu and
| | - R. Vijayaraghavan
- Department of Research, Saveetha Institute of Medical and Technical Sciences, Chennai, Tamil Nadu
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Mukund A, V Srinivasan S, Rana S, Vijayaraghavan R, Patidar Y, Arora V, Jindal A, Choudhury A, Shasthry SM, Sarin SK. Response evaluation of locoregional therapies in combined hepatocellular-cholangiocarcinoma and intrahepatic cholangiocarcinoma versus hepatocellular carcinoma: a propensity score matched study. Clin Radiol 2021; 77:121-129. [PMID: 34789395 DOI: 10.1016/j.crad.2021.10.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Accepted: 10/14/2021] [Indexed: 11/16/2022]
Abstract
AIM To evaluate the response of locoregional therapy (LRT) on combined hepatocellular-cholangiocarcinoma (cHCC-CC) and intrahepatic cholangiocarcinoma (IHC) and compare their outcomes with propensity matched hepatocellular carcinoma (HCC) patients. MATERIALS AND METHODS From January 2011 to July 2020, 13 patients with cHCC-CC (11 men, two women, median age 56 years) and 15 IHC patients (10 men, five women, median age 60 years) were compared with 101 HCC patients (79 men, 22 women, median age 60 years) after LRT. All tumours were proven histologically. Among the 13 cHCC-CC patients, 11 received transarterial chemoembolisation (TACE), one received microwave ablation (MWA) and one received TACE with radiofrequency ablation (RFA). Of 15 IHC patients, eight received TACE, five received RFA, and one received MWA, and one received TACE with RFA. Propensity score matching (PSM) was done with conditional logistic regression adjusted for age, type of LRT, tumour specific features and Child-Pugh score. RESULTS After LRT, on univariate analysis an objective response was seen in 30% of cHCC-CC and 53% of IHC patients. PSM analysis demonstrated shorter progression-free survival (PFS; cHCC-CC versus HCC: 1.5 versus 7.5 months; IHC versus HCC: 6 versus 14 months, p<0.05), overall survival (OS; cHCC-CC versus HCC: 12 versus 28 months; IHC versus HCC: 18 versus 34 months, p<0.005), and poor objective response (cHCC-CC versus HCC: 25% versus 91%; IHC versus HCC: 58% versus 88%, p<0.05) in cHCC-CC and IHC patients versus HCC patients. Hypovascular tumour, macrovascular invasion, and infiltrative appearance were independent prognostic factors for OS in IHC patients. CONCLUSION cHCC-CC and IHC are aggressive tumours with a poor objective response, greater distant progression of the disease and shorter PFS and OS post LRT as compared to HCC.
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Affiliation(s)
- A Mukund
- Department of Interventional Radiology, Institute of Liver and Biliary Sciences, New Delhi, India.
| | - S V Srinivasan
- Department of Interventional Radiology, Institute of Liver and Biliary Sciences, New Delhi, India
| | - S Rana
- Department of Interventional Radiology, Institute of Liver and Biliary Sciences, New Delhi, India
| | - R Vijayaraghavan
- Department of Hepatology, Institute of Liver and Biliary Sciences, New Delhi, India
| | - Y Patidar
- Department of Interventional Radiology, Institute of Liver and Biliary Sciences, New Delhi, India
| | - V Arora
- Department of Hepatology, Institute of Liver and Biliary Sciences, New Delhi, India
| | - A Jindal
- Department of Hepatology, Institute of Liver and Biliary Sciences, New Delhi, India
| | - A Choudhury
- Department of Hepatology, Institute of Liver and Biliary Sciences, New Delhi, India
| | - S M Shasthry
- Department of Hepatology, Institute of Liver and Biliary Sciences, New Delhi, India
| | - S K Sarin
- Department of Hepatology, Institute of Liver and Biliary Sciences, New Delhi, India
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Shah AH, Rana UA, Zhu H, Li J, Vijayaraghavan R, Macfarlane DR, Forsyth M, Siddiqi HM. Study of Proton Transport in Diethylmethylammonium Poly[4-styrenesulfonyl(trifluoromethylsulfonyl)imide]-Based Composite Membranes with Triflic Acid and Diethylmethylamine-Rich Compositions. J Phys Chem B 2021; 125:11005-11016. [PMID: 34570507 DOI: 10.1021/acs.jpcb.1c04399] [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] [Indexed: 11/30/2022]
Abstract
The study highlights the effect of acid- and base-rich conditions on the proton dynamics of diethylmethylammonium poly[4-styrenesulfonyl(trifluoromethylsulfonyl)imide, [DEMA][PSTFSI], a polymerized protic ionic liquid designed as a polymer electrolyte for nonhumidified polymer electrolyte membrane fuel cells. Different proportions of triflic acid (HTf) and diethylmethylamine (DEMA) were added to the pristine polymer. The thermal analysis of the mixtures revealed that the addition of the base increases the glassy/amorphous nature of the polymer; however, HTf plasticizes the polymer and lowers the Tg value, so that it falls outside of the differential scanning calorimetry-studied temperature range. 50 mol % doping of the HTf contents increases the conductivity upto 0.952 mS cm-1, and 50 mol % DEMA mixture has a conductivity of 0.169 mS cm-1 at 100 °C. Vogel-Tamman-Fulcher fitting of the ionic conductivities of the doped systems suggested that the ionic conductivities are completely decoupled from segmental motion of the polymer. A combination of Fourier transform infrared and static NMR studies demonstrated that HTf-added polymer composites show conduction via Grotthuss and vehicular mechanisms, while DEMA-added polymer composites show predominantly a Grotthuss mechanism by developing the aggregates of proton and added base.
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Affiliation(s)
- Azhar Hussain Shah
- Department of Chemistry, Quaid-i-Azam University, Islamabad 45320, Pakistan.,Department of Chemistry and the ARC Center of Excellence for Electromaterials Science, Monash University, Clayton 3800, Victoria, Australia
| | - Usman Ali Rana
- Sustainable Energy Technologies (SET) Center, College of Engineering, King Saud University, P.O. Box 800, Riyadh 11421, Saudi Arabia
| | - Haijin Zhu
- Institute for Frontier Materials, Deakin University, Geelong 3216, Victoria, Australia
| | - Jiaye Li
- Department of Chemistry and the ARC Center of Excellence for Electromaterials Science, Monash University, Clayton 3800, Victoria, Australia
| | - R Vijayaraghavan
- Department of Chemistry and the ARC Center of Excellence for Electromaterials Science, Monash University, Clayton 3800, Victoria, Australia
| | - Douglas R Macfarlane
- Department of Chemistry and the ARC Center of Excellence for Electromaterials Science, Monash University, Clayton 3800, Victoria, Australia
| | - Maria Forsyth
- Institute for Frontier Materials, Deakin University, Geelong 3216, Victoria, Australia
| | - Humaira M Siddiqi
- Department of Chemistry, Quaid-i-Azam University, Islamabad 45320, Pakistan
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Avinash Tejasvi ML, Maragathavalli G, Putcha UK, Ramakrishna M, Vijayaraghavan R, Anulekha Avinash CK. Impact of ERCC1 gene polymorphisms on response to cisplatin based therapy in oral squamous cell carcinoma (OSCC) patients. INDIAN J PATHOL MICR 2021; 63:538-543. [PMID: 33154302 DOI: 10.4103/ijpm.ijpm_964_19] [Citation(s) in RCA: 4] [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] [Indexed: 11/04/2022] Open
Abstract
Background and Objectives Cisplatin is one of the major drugs that used in the treatment of oral cancer.Excision repair cross-complementation group 1 (ERCC1) is a key DNA repair gene in the nucleotide excision repair pathway which is activated in the repair of intra- and interstrand DNA crosslink caused by platinum-based treatment. The aim of this study was to investigate the association between polymorphisms in ERCC1 (C118T & C8092A) genes and the response to cisplatin-based chemotherapy. Methods ERCC1polymorphisms (C118T & C8092A) were studied using PCR-RFLP method from 150 OSCC patients as cases as well as 150 normal tissues from the same patients were collected as controls for this study. Results: Frequencies of ERCC1 C118C, C118T and T118T genotypes were 60%, 28% and 12% in OSCC patients and 78%, 19% and 3% in the controls, respectively. The C118T & T118T genotype had a 1.69 and 4.97 -folds increased risk for OSCC. Frequencies of ERCC1 C8092C, C8092A and A8092A were 78%, 18% and 4% in the OSCC patients and 89%, 10%, amd 1% in the controls, respectively. The C8092A genotype showed a 1.97-fold increased risk for OSCC. Interpretation & Conclusions In conclusion, this study highlights the DNA repair gene polymorphisms that might play a role in mediating susceptibility to oral squamous cell carcinoma and cisplatin therapy. Our data suggest that the ERCC1 C118T, T118T and ERCC1 C8092A genotypes are genetic risk factors for Oral squamous cell carcinoma and ERCC1 118 C/T and C8092A polymorphisms have significant influence on clinical outcome.
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Affiliation(s)
- M L Avinash Tejasvi
- Department of Oral Medicine and Radiology, Kamineni Institute of Dental Sciences, Narketpally, Telangana, Ph.D Scholar (Oral Medicine and Radiology), Saveetha University, Chennai, Tamil Nadu, India
| | - G Maragathavalli
- Department of Oral Medicine and Radiology, Saveetha Dental College and Hospitals, Chennai, Tamil Nadu, India
| | - Uday Kumar Putcha
- Department of Pathology and Microbiology, National Institute of Nutrition, Hyderabad, Telangana, India
| | - M Ramakrishna
- Department of Radiation Oncology, MNJ Institute of Oncology and Regional Cancer Centre, Hyderabad, Telangana, India
| | - R Vijayaraghavan
- Department of Research and Development, Saveetha University, Chennai, Tamil Nadu, India
| | - C K Anulekha Avinash
- Department of Prosthodontics, Kamineni Institute of Dental Sciences, Narketpally, Telangana, India
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Matuszek K, Vijayaraghavan R, Kar M, Mahadevan S, MacFarlane DR. Guanidinium Organic Salts as Phase-Change Materials for Renewable Energy Storage. ChemSusChem 2021; 14:2757-2762. [PMID: 33982440 DOI: 10.1002/cssc.202100724] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Revised: 05/10/2021] [Indexed: 06/12/2023]
Abstract
A dearth of inexpensive means of energy storage is constraining the expansion of intermittent renewable energy sources such as sun and wind. Thermal energy storage technology utilizing phase-change materials (PCMs) is a promising solution, enabling storage of large quantities of thermal energy at a relatively low cost. Guanidinium mesylate, which melts at 208 °C with latent heat of fusion of ΔHf =190 J g-1 is a promising PCM candidate for these applications.[1] Here, studies on guanidinium organic salts were conducted, including heat capacity, thermal conductivity, advanced thermal stability, long-term cycling, and economic analysis. The data place guanidinium mesylate among the best PCMs operating in the 100-220 °C temperature region in terms of thermal energy storage, with total volumetric energy storage measured as 622 MJ m-3 (173 kWh m-3 ). Additionally, it was shown to be stable during cycling, with over 400 cycles performed. Simple economic analysis indicated a cost of 6 USD per MJ of stored thermal energy. This study proves that guanidinium mesylate and potentially other similar salts can be feasible as PCMs for inexpensive energy storage for renewable energy storage applications.
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Affiliation(s)
- Karolina Matuszek
- School of Chemistry, Monash University, 3800, Clayton, VIC, Australia
| | - R Vijayaraghavan
- School of Chemistry, Monash University, 3800, Clayton, VIC, Australia
| | - Mega Kar
- School of Chemistry, Monash University, 3800, Clayton, VIC, Australia
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Somanath D, Vijayakumar J, Suriyakumari KVP, Vijayaraghavan R. Effect of Fucoidan on the Regulation of Antioxidant Enzymes in Hepatorenal Tissues of Streptozotocin-Induced Diabetic Rats. Indian J Pharm Sci 2021. [DOI: 10.36468/pharmaceutical-sciences.871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Sundaram V, Ramanan RN, Selvaraj M, Vijayaraghavan R, MacFarlane DR, Ooi CW. Structural stability of insulin aspart in aqueous cholinium aminoate ionic liquids based on molecular dynamics simulation studies. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.114501] [Citation(s) in RCA: 7] [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: 10/23/2022]
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Vijayaraghavan R, Kar M, Sivanesh NE, Samuel VJ, Surianarayanan M, Olsen S, MacFarlane DR. Influence of ion structure on thermal runaway behaviour of aprotic and protic ionic liquids. Chem Commun (Camb) 2020; 56:11819-11822. [PMID: 33021275 DOI: 10.1039/d0cc04937a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Accelerated rate calorimetric studies have been employed to study the exothermic and thermal runaway behaviour of some aprotic and protic ionic liquids based on several families of ions including the bis(flurorsulfonyl)imide anion ([FSI]-); it was found that the protic salts are safer than aprotic salts of the [FSI]- anion.
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Affiliation(s)
- R Vijayaraghavan
- School of Chemistry, Monash University, Clayton, Victoria 3800, Australia.
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Abstract
Polycystic Ovary Syndrome is a multifactorial reproductive problem and a leading cause of female infertility worldwide. Evidences have shown that Oxidative Stress and decreased antioxidant status are often linked with PCOS. Insulin Resistance in PCOS patients ranges from 50% to 70% and may encourage OS by production of reactive oxygen species.Objective: Our study determines serum MDA levels along with plasma glucose, serum insulin, and insulin resistance in obese and nonobese PCOS subjects.Materials and methods: A case control study was conducted on diagnosed 100 PCOS patients and 100 controls. Fasting plasma glucose was measured by enzymatic method. Insulin was estimated by chemiluminescent microparticle immunoassay using Abott Architect i 2000 SR analyser. Insulin resistance was calculated by HOMA-IR. Malonaldehyde is determined as Thiobarbituric acid reactive substances.Results: CRP and serum MDA levels were increased in women with PCOS irrespective of obesity compared to their respective controls with a p value of < .001. However, though fasting glucose, serum insulin, and IR were increased in both obese and nonobese women with PCOS compared to their BMI adjusted controls with p value of < .001, the values were within reference range in nonobese women.Conclusion: Our study suggests that women with PCOS have oxidative stress and elevated CRP irrespective of obesity. However, hyperinsulinemia and Insulin resistance are seen only in obese women with PCOS, indicating that these women are at high risk for developing low grade inflammation and cardiovascular diseases.
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Affiliation(s)
- Doddappa M Bannigida
- Department of Biochemistry, Koppal Institute of Medical Sciences, Koppal, India
- Department of Research, Saveetha University, Thandalam, India
| | - B Shivananda Nayak
- Faculty of Medical Sciences, Department of preclinical Sciences, The University of the West Indies, Trinidad
- Department of Biochemistry, Subbaiah Institute of Medical sciences, Shimoga, India
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17
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Banerjee S, Arora A, Vijayaraghavan R, Patti AF. Extraction and crosslinking of bromelain aggregates for improved stability and reusability from pineapple processing waste. Int J Biol Macromol 2020; 158:318-326. [PMID: 32353500 DOI: 10.1016/j.ijbiomac.2020.04.220] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Revised: 04/23/2020] [Accepted: 04/24/2020] [Indexed: 01/01/2023]
Abstract
The present study is first of its kind that focuses upon the extraction of bromelain from pineapple core waste and stabilising it as insoluble cross-linked aggregates. The influence of process variables such as the choice of precipitant, type of cross-linker, concentration of cross-linker and the reaction time for cross-linking step was investigated upon the activity recovery of bromelain cross-linked aggregates. The optimization of this biocatalyst preparation specifically recovered 87% of the enzymatic activity available in pineapple core waste by ammonium sulphate (60%, w/v) precipitation followed by cross-linking for 4 h with 80 mM glutaraldehyde. Cross-linked bromelain aggregates were thermally more stable and exhibited higher pH stability in comparison to free bromelain. The cross-linked bromelain aggregates exhibited higher operational stability in different organic solvents at 4 °C. The highest operational stability (% stability given in parenthesis) was observed in acetone (100%) followed by hexane (53.6%), ethyl acetate (39.6%), ethanol (32.5%) and chloroform (14.9%). The kinetic studies revealed higher Km value (5.45 mM) after the formation of cross-linked bromelain aggregates as compared to free bromelain (5.04 mM) with almost similar Vmax values. Cross-linked bromelain aggregates also showed significant reusability characteristics with an activity retention of >85% after 5-time cycles. Such recyclability of bromelain cross-linked aggregates could lead to potential industrial applications in both food and non-food sector. In addition, the present extraction method avoids costs related to purification and expensive immobilization carriers.
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Affiliation(s)
- Shivali Banerjee
- IITB - Monash Research Academy, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India; Bio-Processing Laboratory, Centre for Technology Alternatives for Rural Areas, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India; School of Chemistry, Green Chemical Futures, Monash University, Wellington Road, Clayton, Victoria 3800, Australia
| | - Amit Arora
- IITB - Monash Research Academy, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India; Bio-Processing Laboratory, Centre for Technology Alternatives for Rural Areas, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India.
| | - R Vijayaraghavan
- School of Chemistry, Green Chemical Futures, Monash University, Wellington Road, Clayton, Victoria 3800, Australia
| | - Antonio F Patti
- School of Chemistry, Green Chemical Futures, Monash University, Wellington Road, Clayton, Victoria 3800, Australia.
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18
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Matuszek K, Vijayaraghavan R, Forsyth CM, Mahadevan S, Kar M, MacFarlane DR. Pyrazolium Phase-Change Materials for Solar-Thermal Energy Storage. ChemSusChem 2020; 13:159-164. [PMID: 31657142 DOI: 10.1002/cssc.201902601] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2019] [Revised: 10/24/2019] [Indexed: 06/10/2023]
Abstract
Thermal energy storage technology utilizing phase-change materials (PCMs) can be a promising solution for the intermittency of renewable energy sources. This work describes a novel family of PCMs based on the pyrazolium cation, that operate in the 100-200 °C temperature range, offering safe, inexpensive capacity and low supercooling. Thermal stability and extensive cycling tests of the most promising PCM candidate, pyrazolium mesylate (Tm =168±1 °C, ΔHf =160 J g-1 ±5 %, ΔHtotal v =495 MJ m-3 ±5 %) show potential for its use in thermal storage applications. Additionally, this work discusses the molecular origins of the high thermal energy storage capacity of these ionic materials based on their crystal structures, revealing the importance of hydrogen bonds in PCM performance.
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Affiliation(s)
- Karolina Matuszek
- School of Chemistry, Monash University, Clayton, VIC 3800, Australia
| | - R Vijayaraghavan
- School of Chemistry, Monash University, Clayton, VIC 3800, Australia
| | - Craig M Forsyth
- School of Chemistry, Monash University, Clayton, VIC 3800, Australia
| | - Surianarayanan Mahadevan
- Chemical Engineering Department, Central Leather Research Institute, Adyar, Chennai, 6000-20, Tamilnadu, India
| | - Mega Kar
- School of Chemistry, Monash University, Clayton, VIC 3800, Australia
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19
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Francis Y, Vijayakumar J, Raghunath G, Vijayalakshmi S, Sivanesan S, Vijayaraghavan R, Sukumar E. Protective effect of Carica papaya leaf extract against mercuric chloride-induced nephrotoxicity in wistar rats. Pharmacogn Mag 2020. [DOI: 10.4103/pm.pm_11_20] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [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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20
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Deras I, Du T, Zhao C, Haseley N, Yazdanparast A, Jiang T, Mentzer A, Purdy A, Crain B, Echegaray C, Lee D, Lee J, Silhavy J, O’Brien K, Vijayaraghavan R, Garcia R, Haigis R, Pawlowski T, Dockter J. Clinical and analytical accuracy of a 523 gene panel next-generation sequencing (NGS) assay on formalin-fixed paraffin-embedded (FFPE) solid tumour samples. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz257.005] [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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21
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Natarajan U, Venkatesan T, Vijayaraghavan R, Samuel S, Rathinavelu A. Abstract 5187: Effect of histone deacetylase inhibitor on PD-L1 expression in lung cancer cells. Cancer Res 2019. [DOI: 10.1158/1538-7445.am2019-5187] [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] [Indexed: 11/16/2022]
Abstract
Abstract
Programmed Cell Death Ligand-1 (PD-L1) is frequently expressed on tumor cells and tumor-infiltrating immune cells. The expression of PD-L1 is indicative of immunosuppression and cause for poor prognosis in several cancers. The effects of PD-L1 are mediated through its binding to the Programmed Cell Death-1 (PD-1) receptor, which is a co-inhibitory surface molecule that is expressed on lymphoid and non-lymphoid derived cells. After PD-L1 binding the PD-1 receptor mediates the signals intracellularly to suppress peripheral T-cell responses. Therefore, determining the mechanisms of up-regulation or down-regulation of the PD-L1 is very crucial for the purpose of devising strategies to reactivate the T-cells that can lead to enhanced tumor attack. However, the cellular mechanisms that determine the levels of PD-L1 are not fully understood at this time. Hence, we analyzed different cancer cell lines for the expression levels of PD-L1 and confirmed the highest-level of expression in HCC827 lung cancer cells. In addition, H460, H1975 (Lung Cancer), SJSA1 (Osteosarcoma) and U-87 MG (Glioblastoma) cells were found to express PD-L1 in high levels. Relatively, lower level expression of PD-L1 was detected in H226 (Squamous Cell Carcinoma) PANC-1 (Pancreatic Cancer), CFPAC-1 (Pancreatic, Ductal Adenocarcinoma) and LNCaP (Prostate Cancer) cells compared to HCC827. Since, alterations in gene expressions are often regulated by epigenetic modifications, we conducted experiments to determine whether the expression of PD-L1 can also be altered by the HDAC inhibitor SAHA (Suberoylanilide hydroxamic acid). In our experiments, SAHA (7.5 μM) was able to reduce the expression of PD-L1 in a time and dose dependent manner and produced more than 50% decrease in the protein levels within 24 hrs. while the level of PD-L1 was significantly reduced, concomitant decreases in EGFR, phospho-EGFR levels were also observed in HCC827 cells following SAHA treatment. Furthermore, SAHA was able to increase the levels of acetyl-H2B, acetyl-H3 and acetyl-H4, which confirmed the impact of HDAC inhibition on the acetylation status of histones. Since de-acetylation mediated unwinding of the DNA is typically responsible for the increased expression of genes such as p21/CDKN1A, it is suspected that the decrease in the PD-L1 levels may be due to reduced transcription of the CD274 gene that is coding for PD-L1. However, it is not clear whether the decrease in PD-L1 expression observed is because of p21 mediated negative control on the transcription process or due to some other mechanism. Additional studies are required to fully understand the actual mechanisms that may be involved in the regulation of PD-L1 expression by HDACs and their inhibitors. (This research was supported by the Royal Dames of Cancer Research Inc., Fort Lauderdale, Florida).
Citation Format: Umamaheswari Natarajan, Thiagarajan Venkatesan, R Vijayaraghavan, Shila Samuel, Appu Rathinavelu. Effect of histone deacetylase inhibitor on PD-L1 expression in lung cancer cells [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2019; 2019 Mar 29-Apr 3; Atlanta, GA. Philadelphia (PA): AACR; Cancer Res 2019;79(13 Suppl):Abstract nr 5187.
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Affiliation(s)
| | | | | | - Shila Samuel
- 1VRR Inst. of Biomedical Science, Kattuppakkam, Chennai, India
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22
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Selvan CT, Malkovskiy AV, Vijayaraghavan R, Babu GR, Senthilkumar S. New insights into odontological exploration of drowning using rat model - A pilot study. J Forensic Odontostomatol 2019; 37:51-62. [PMID: 31187743 PMCID: PMC6875243] [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] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Dental forensics for the resolution of unnatural death remains an underdeveloped field. Accordingly, an experimental study was conducted with six to seven months old Wistar rats that were drowned in order to identify key postmortem features and pattern of dental decomposition. The visual, structural and elemental changes were assessed periodically. Based on mode of death, they were designated as SB (euthanized and soil buried), FWD (fresh water drowned) and SWD (sea water drowned). Postmortem features as well as the structural and elemental patterns of decomposition of teeth were analyzed with Field Emission Scanning Electron Microscopy (FE-SEM) and Energy Dispersive Spectroscopy (EDAX) periodically for two months. The periodic observation of elemental changes in the teeth of SB, FWD and SWD rats allowed us to derive an equation using linear regression analysis to relate the degree of dental decomposition with the time since death. The difference in pattern of surface deterioration was also observed. The present findings could provide a better knowledge in resolving unnatural deaths and supporting evidence for legal prosecution.
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Affiliation(s)
- C T Selvan
- Institute of Forensic Science, Gujarat Forensic Sciences University, Gujarat. India
| | - A V Malkovskiy
- Biomaterials & Advanced Drug Delivery Laboratory (BioADD), Stanford University School of Medicine, Stanford University, Palo Alto, CA ,USA
| | - R Vijayaraghavan
- Department of Research and Development, Saveetha Institute of Medical and Technical Sciences, Chennai. TN India
| | - G R Babu
- Institute of Forensic Science, Gujarat Forensic Sciences University, Gujarat. India
| | - S Senthilkumar
- Department of Research and Development, Saveetha Institute of Medical and Technical Sciences, Chennai. TN India
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23
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Natarajan U, Venkatesan T, Samuel SS, Vijayaraghavan R, Rathinavelu A. Effects of SAHA and RG7388 on p21
WAF1/CIP1
and p27
KIP1
mediated Pathways in Cancer Cells. FASEB J 2019. [DOI: 10.1096/fasebj.2019.33.1_supplement.647.28] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Umamaheswari Natarajan
- VRR Institute for Biomedical ScienceChennaiIndia
- Rumbaugh Goodwin Institute for Cancer ResearchNova Southeastern UniversityFt. LauderdaleFL
| | - Thiagarajan Venkatesan
- Rumbaugh Goodwin Institute for Cancer ResearchNova Southeastern UniversityFt. LauderdaleFL
| | | | | | - Appu Rathinavelu
- Rumbaugh Goodwin Institute for Cancer ResearchNova Southeastern UniversityFt. LauderdaleFL
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24
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MacFarlane DR, Chong AL, Forsyth M, Kar M, Vijayaraghavan R, Somers A, Pringle JM. New dimensions in salt-solvent mixtures: a 4th evolution of ionic liquids. Faraday Discuss 2019; 206:9-28. [PMID: 29034392 DOI: 10.1039/c7fd00189d] [Citation(s) in RCA: 64] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
In the field of ionic liquids (ILs) it has long been of fundamental interest to examine the transition from salt-in-solvent behaviour to pure liquid-salt behaviour, in terms of structures and properties. At the same time, a variety of applications have beneficially employed IL-solvent mixtures as media that offer an optimal set of properties. Their properties in many cases can be other than as expected on the basis of simple mixing concepts. Instead, they can reflect the distinct structural and interaction changes that occur as the mixture passes through the various stages from pure coulombic medium, to "plasticised" coulombic medium, into a meso-region where distinct molecular and ionic domains can co-exist. Such domains can persist to quite a high dilution into the salt-in-solvent regime and their presence manifests itself in a number of important synergistic interaction effects in diverse areas such as membrane transport and corrosion protection. Similarly, the use of ionic liquids in synthetic processes where there is a significant volume fraction of molecular species present can produce a variety of distinct and unexpected effects. The range of these salt-solvent mixtures is considerably broader than just those based on ionic liquids, since there is only minor value in the pure salt being a liquid at the outset. In other words, the extensive families of organic and metal salts become candidates for study and use. Our perspective then is of an evolution of ionic liquids into a broader field of fundamental phenomena and applications. This can draw on an even larger family of tuneable salts that exhibit an exciting combination of properties when mixed with molecular liquids.
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Affiliation(s)
- Douglas R MacFarlane
- School of Chemistry, The Australian Centre of Excellence for Electromaterials Science, Monash University, Clayton, Vic 3800, Australia.
| | - Alison L Chong
- School of Chemistry, The Australian Centre of Excellence for Electromaterials Science, Monash University, Clayton, Vic 3800, Australia.
| | - Maria Forsyth
- Institute for Frontier Materials, The Australian Centre of Excellence for Electromaterials Science Deakin University, Melbourne, Australia.
| | - Mega Kar
- School of Chemistry, The Australian Centre of Excellence for Electromaterials Science, Monash University, Clayton, Vic 3800, Australia.
| | - R Vijayaraghavan
- School of Chemistry, The Australian Centre of Excellence for Electromaterials Science, Monash University, Clayton, Vic 3800, Australia.
| | - Anthony Somers
- Institute for Frontier Materials, The Australian Centre of Excellence for Electromaterials Science Deakin University, Melbourne, Australia.
| | - Jennifer M Pringle
- Institute for Frontier Materials, The Australian Centre of Excellence for Electromaterials Science Deakin University, Melbourne, Australia.
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25
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Zhu H, Vijayaraghavan R, MacFarlane DR, Forsyth M. Self-assembled structure and dynamics of imidazolium-based protic salts in water solution. Phys Chem Chem Phys 2019; 21:2691-2696. [PMID: 30657496 DOI: 10.1039/c8cp07254j] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Protic ionic liquids containing cations with long alkyl chains can form self-assembled micelles, vesicles, microemulsions, and lyotropic liquid crystal structures in water, acid water or tetrahydrofuran, etc. As a result of this unique property, they are regarded as a novel category of amphiphiles, and are gaining importance in the field of colloid and interface chemistry. The critical micelle concentration (CMC) of protic salts, e.g., alkyl-ammonium nitrates in water, was found to increase with decreasing chain length. It is generally believed that a long alkyl chain length is essential for the formation of self-assembled structures. So far, no self-assembled structure has been reported for protic ionic liquids with an alkyl chain length of n < 4. This paper reports on the structure and dynamics of two imidazolium based protic organic salts with no alkyl chain or a methyl group (n = 1) attached to the cation in water solution, determined through a detailed analysis of NMR spectra and pulsed-field gradient NMR data. We demonstrate that these imidazolium cations with no or a short alkyl chain (n = 1) can form a self-assembled clustering structure in water solution, which has a strong influence on the diffusion behavior of imidazolium molecular ions. It is speculated that this self-assembled structure is likely to be present in other similar solutions of ionic liquids with short alkyl chains.
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Affiliation(s)
- Haijin Zhu
- Institute for Frontier Materials, Deakin University, 75 Pigdons Rd, Geelong, Victoria 3216, Australia.
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26
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Vijayaraghavan R, Thay WY. Protein loosing enteropathy after Fontan procedure. Med J Malaysia 2018; 73:175-176. [PMID: 29962503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Fontan and Baudet described the procedure in 1971 and was very useful to improve the quality of life in many complex cyanotic heart diseases. It has gone through various modifications since then to improve the outcome. The mortality was reported as 2.1% and survival rate of at 5 years, 10 years, 15 years and 20 years were 91%, 80%, 73%and 69% respectively. Though it was a useful palliative procedure to improve the quality of life, it has complications which may affect the morbidity and mortality like Protein loosing enteropathy ,reduced exercise capacity thromboembolism. The patients with protein losing enteropathy present with Pleural effusion, ascites, and edema and they need periodic replacement of Albumin and frequent reviews and close follow up in the management to reduce the mortality and to improve the quality of life .These complications we come across and they need our support in the management at district level hospitals.
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Affiliation(s)
| | - W Y Thay
- Hospital Tawau, Department of Paediatrics, Sabah, Malaysia
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27
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Liu L, Toung JM, Jassowicz AF, Vijayaraghavan R, Kang H, Zhang R, Kruglyak KM, Huang HJ, Hinoue T, Shen H, Salathia NS, Hong DS, Naing A, Subbiah V, Piha-Paul SA, Bibikova M, Granger G, Barnes B, Shen R, Gutekunst K, Fu S, Tsimberidou AM, Lu C, Eng C, Moulder SL, Kopetz ES, Amaria RN, Meric-Bernstam F, Laird PW, Fan JB, Janku F. Targeted methylation sequencing of plasma cell-free DNA for cancer detection and classification. Ann Oncol 2018; 29:1445-1453. [PMID: 29635542 PMCID: PMC6005020 DOI: 10.1093/annonc/mdy119] [Citation(s) in RCA: 82] [Impact Index Per Article: 13.7] [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] [Indexed: 12/18/2022] Open
Abstract
Background Targeted methylation sequencing of plasma cell-free DNA (cfDNA) has a potential to expand liquid biopsies to patients with tumors without detectable oncogenic alterations, which can be potentially useful in early diagnosis. Patients and methods We developed a comprehensive methylation sequencing assay targeting 9223 CpG sites consistently hypermethylated according to The Cancer Genome Atlas. Next, we carried out a clinical validation of our method using plasma cfDNA samples from 78 patients with advanced colorectal cancer, non-small-cell lung cancer (NSCLC), breast cancer or melanoma and compared results with patients' outcomes. Results Median methylation scores in plasma cfDNA samples from patients on therapy were lower than from patients off therapy (4.74 versus 85.29; P = 0.001). Of 68 plasma samples from patients off therapy, methylation scores detected the presence of cancer in 57 (83.8%), and methylation-based signatures accurately classified the underlying cancer type in 45 (78.9%) of these. Methylation scores were most accurate in detecting colorectal cancer (96.3%), followed by breast cancer (91.7%), melanoma (81.8%) and NSCLC (61.1%), and most accurate in classifying the underlying cancer type in colorectal cancer (88.5%), followed by NSCLC (81.8%), breast cancer (72.7%) and melanoma (55.6%). Low methylation scores versus high were associated with longer survival (10.4 versus 4.4 months, P < 0.001) and longer time-to-treatment failure (2.8 versus 1.6 months, P = 0.016). Conclusions Comprehensive targeted methylation sequencing of 9223 CpG sites in plasma cfDNA from patients with common advanced cancers detects the presence of cancer and underlying cancer type with high accuracy. Methylation scores in plasma cfDNA correspond with treatment outcomes.
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Affiliation(s)
- L Liu
- Illumina, Inc., San Diego, The University of Texas MD Anderson Cancer Center, Houston, USA.
| | - J M Toung
- Illumina, Inc., San Diego, The University of Texas MD Anderson Cancer Center, Houston, USA
| | - A F Jassowicz
- Department of Investigational Cancer Therapeutics (Phase I Clinical Trials Program), The University of Texas MD Anderson Cancer Center, Houston, USA
| | - R Vijayaraghavan
- Illumina, Inc., San Diego, The University of Texas MD Anderson Cancer Center, Houston, USA
| | - H Kang
- Illumina, Inc., San Diego, The University of Texas MD Anderson Cancer Center, Houston, USA
| | - R Zhang
- Illumina, Inc., San Diego, The University of Texas MD Anderson Cancer Center, Houston, USA
| | - K M Kruglyak
- Illumina, Inc., San Diego, The University of Texas MD Anderson Cancer Center, Houston, USA
| | - H J Huang
- Department of Investigational Cancer Therapeutics (Phase I Clinical Trials Program), The University of Texas MD Anderson Cancer Center, Houston, USA
| | - T Hinoue
- Van Andel Research Institute, Grand Rapids, The University of Texas MD Anderson Cancer Center, Houston, USA
| | - H Shen
- Van Andel Research Institute, Grand Rapids, The University of Texas MD Anderson Cancer Center, Houston, USA
| | - N S Salathia
- Illumina, Inc., San Diego, The University of Texas MD Anderson Cancer Center, Houston, USA
| | - D S Hong
- Department of Investigational Cancer Therapeutics (Phase I Clinical Trials Program), The University of Texas MD Anderson Cancer Center, Houston, USA
| | - A Naing
- Department of Investigational Cancer Therapeutics (Phase I Clinical Trials Program), The University of Texas MD Anderson Cancer Center, Houston, USA
| | - V Subbiah
- Department of Investigational Cancer Therapeutics (Phase I Clinical Trials Program), The University of Texas MD Anderson Cancer Center, Houston, USA
| | - S A Piha-Paul
- Department of Investigational Cancer Therapeutics (Phase I Clinical Trials Program), The University of Texas MD Anderson Cancer Center, Houston, USA
| | - M Bibikova
- Illumina, Inc., San Diego, The University of Texas MD Anderson Cancer Center, Houston, USA
| | - G Granger
- Illumina, Inc., San Diego, The University of Texas MD Anderson Cancer Center, Houston, USA
| | - B Barnes
- Illumina, Inc., San Diego, The University of Texas MD Anderson Cancer Center, Houston, USA
| | - R Shen
- Illumina, Inc., San Diego, The University of Texas MD Anderson Cancer Center, Houston, USA
| | - K Gutekunst
- Illumina, Inc., San Diego, The University of Texas MD Anderson Cancer Center, Houston, USA
| | - S Fu
- Department of Investigational Cancer Therapeutics (Phase I Clinical Trials Program), The University of Texas MD Anderson Cancer Center, Houston, USA
| | - A M Tsimberidou
- Department of Investigational Cancer Therapeutics (Phase I Clinical Trials Program), The University of Texas MD Anderson Cancer Center, Houston, USA
| | - C Lu
- Department of Thoracic/Head and Neck Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, USA
| | - C Eng
- Department of Gastrointestinal Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, USA
| | - S L Moulder
- Department of Breast Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, USA
| | - E S Kopetz
- Department of Gastrointestinal Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, USA
| | - R N Amaria
- Department of Melanoma Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, USA
| | - F Meric-Bernstam
- Department of Investigational Cancer Therapeutics (Phase I Clinical Trials Program), The University of Texas MD Anderson Cancer Center, Houston, USA
| | - P W Laird
- Van Andel Research Institute, Grand Rapids, The University of Texas MD Anderson Cancer Center, Houston, USA
| | - J-B Fan
- Illumina, Inc., San Diego, The University of Texas MD Anderson Cancer Center, Houston, USA
| | - F Janku
- Department of Investigational Cancer Therapeutics (Phase I Clinical Trials Program), The University of Texas MD Anderson Cancer Center, Houston, USA.
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29
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Song CP, Ramanan RN, Vijayaraghavan R, MacFarlane DR, Chan ES, Show PL, Yong ST, Ooi CW. Effect of salt-based adjuvant on partition behaviour of protein in aqueous two-phase systems composed of polypropylene glycol and cholinium glycinate. Sep Purif Technol 2018. [DOI: 10.1016/j.seppur.2017.09.017] [Citation(s) in RCA: 14] [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: 10/18/2022]
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30
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Abstract
Highly efficient low-viscosity protic ionic liquids with enhanced CO2 absorption capacities exhibiting more than 20% w/w uptake.
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Affiliation(s)
- Tamas Oncsik
- School of Chemistry
- Monash University
- Clayton Campus
- Vic 3800
- Australia
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31
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Rao J, Vijayaraghavan R, Zhou Y, Howlett PC, MacFarlane DR, Forsyth M, Zhu H. The influence of anion chemistry on the ionic conductivity and molecular dynamics in protic organic ionic plastic crystals. Phys Chem Chem Phys 2018; 20:4579-4586. [DOI: 10.1039/c7cp07330e] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [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
Protic organic ionic plastic crystals based on different anions exhibit more than two orders of magnitude difference in conductivity.
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Affiliation(s)
- Jun Rao
- ARC Centre of Excellence for Electromaterials Science (ACES)
- Institute for Frontier Materials (IFM)
- Deakin University
- Melbourne Campus at Burwood
- Burwood VIC 3125
| | - R. Vijayaraghavan
- ARC Centre of Excellence for Electromaterials Science (ACES)
- School of Chemistry
- Monash University
- Clayton
- Australia
| | - Yundong Zhou
- ARC Centre of Excellence for Electromaterials Science (ACES)
- Institute for Frontier Materials (IFM)
- Deakin University
- Melbourne Campus at Burwood
- Burwood VIC 3125
| | - Patrick C. Howlett
- ARC Centre of Excellence for Electromaterials Science (ACES)
- Institute for Frontier Materials (IFM)
- Deakin University
- Melbourne Campus at Burwood
- Burwood VIC 3125
| | - Douglas R. MacFarlane
- ARC Centre of Excellence for Electromaterials Science (ACES)
- School of Chemistry
- Monash University
- Clayton
- Australia
| | - Maria Forsyth
- ARC Centre of Excellence for Electromaterials Science (ACES)
- Institute for Frontier Materials (IFM)
- Deakin University
- Melbourne Campus at Burwood
- Burwood VIC 3125
| | - Haijin Zhu
- ARC Centre of Excellence for Electromaterials Science (ACES)
- Institute for Frontier Materials (IFM)
- Deakin University
- Melbourne Campus at Burwood
- Burwood VIC 3125
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Nithyadharseni P, Abhilash K, Petnikota S, Anilkumar M, Jose R, Ozoemena K, Vijayaraghavan R, Kulkarni P, Balakrishna G, Chowdari B, Adams S, Reddy M. Synthesis and Lithium Storage Properties of Zn, Co and Mg doped SnO2 Nano Materials. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.06.170] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Jassowicz A, Liu L, Huang H, Hong D, Naing A, Subbiah V, Piha-Paul S, Toung J, Vijayaraghavan R, Zhang R, Kang H, Fu S, Tsimberiodou A, Lu C, Eng C, Moulder S, Kopetz S, Amaria R, Meric-Bernstam F, Janku F. Targeted methylation sequencing of plasma cell-free DNA identifies patients with advanced breast, colorectal, non-small cell lung cancer, melanoma with poor outcomes. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx363.041] [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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Díaz M, Ortiz A, Pringle J, Wang X, Vijayaraghavan R, MacFarlane D, Forsyth M, Ortiz I. Protic plastic crystal/PVDF composite membranes for Proton Exchange Membrane Fuel Cells under non-humidified conditions. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.07.076] [Citation(s) in RCA: 28] [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: 11/28/2022]
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Jayakumar S, Raghunath G, Ilango S, Vijayakumar J, Vijayaraghavan R. Effect of Fluoxetine on the Hippocampus of Wistar Albino Rats in Cold Restraint Stress Model. J Clin Diagn Res 2017; 11:AF01-AF06. [PMID: 28764145 DOI: 10.7860/jcdr/2017/26958.9953] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2017] [Accepted: 03/06/2017] [Indexed: 11/24/2022]
Abstract
INTRODUCTION Stress has been known to be a potential modulator of learning and memory. Long term stress can lead to depression. Fluoxetine is a selective serotonin reuptake inhibitor group of drug used in the treatment of depression. AIM The present study was conducted to evaluate the potential of Fluoxetine on cold restraint induced stress in the hippocampus of Wistar rats. MATERIALS AND METHODS A total of 18 male wistar albino rats were divided randomly into three groups (n=6). Group 1 was the control group which were kept in normal laboratory conditions. Group 2 was the negative control group which were given cold restraint stress for period of four weeks. Group 3 was the experimental group, where the animals were pretreated with fluoxetine 10 mg/kg for a period of one week followed by cold restraint stress for 30 minutes and cotreated with fluoxetine 10 mg/kg for a period of four weeks. The whole study was done for a period of five weeks followed by behavioural studies and subsequently sacrificed with removal of brain for various histological, Immunohistochemical (IHC), neurochemical and antioxidant analysis. The values were expressed as Mean±SEM. One-way analysis of variance followed by Tukey's multiple comparisons test was used for the comparison of means. A probability of 0.05 and less was taken as statistically significant using Prism Graphpad software version 6.01. RESULTS The results show there was significant improvement in the Morris water maze test after treatment with fluoxetine in Group 2. Similar results were also noted in the levels of neurotransmitters and antioxidant levels in brain and also in the number of cells counted in IHC and histological studies by H&E when Group 3 was compared with Group 2. The treatment reversed the damage in Group 2 which was comparable with the control group. CONCLUSION The results revealed that administration of fluoxetine 10 mg/kg given orally has a potential antistressor effect by improving the neurogenic and neuroprotective effect on the cold restraint stress induced hippocampal damage.
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Affiliation(s)
- Saikarthik Jayakumar
- Research Scholar, Department of Anatomy, Saveetha University, Chennai, Tamil Nadu, India
| | - Gunapriya Raghunath
- Professor and Head, Department of Anatomy, Saveetha Medical College, Chennai, Tamil Nadu, India
| | - Saraswathi Ilango
- Research Scholar, Department of Physiology, Bharath University, Chennai, Tamil Nadu, India
| | - J Vijayakumar
- Professor, Department of Anatomy, Saveetha Medical College, Chennai, Tamil Nadu, India
| | - R Vijayaraghavan
- Director of Research, Department of Anatomy, Saveetha University, Chennai, Tamil Nadu, India
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Pan M, Vijayaraghavan R, Zhou F, Kar M, Li H, Wang C, MacFarlane DR. Enhanced CO2 uptake by intramolecular proton transfer reactions in amino-functionalized pyridine-based ILs. Chem Commun (Camb) 2017; 53:5950-5953. [DOI: 10.1039/c7cc01796k] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
This work presents a new strategy for the promotion of CO2 uptake by an intramolecular proton transfer reaction in amino functionalized hydroxypyridine based anions.
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Affiliation(s)
- Mingguang Pan
- Department of Chemistry
- Zhejiang University
- Hangzhou
- China
- Department of Chemistry
| | | | - Fengling Zhou
- Department of Chemistry
- Monash University
- Clayton
- Australia
| | - Mega Kar
- Department of Chemistry
- Monash University
- Clayton
- Australia
| | - Haoran Li
- Department of Chemistry
- Zhejiang University
- Hangzhou
- China
| | - Congmin Wang
- Department of Chemistry
- Zhejiang University
- Hangzhou
- China
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Banerjee J, Singh R, Vijayaraghavan R, MacFarlane D, Patti AF, Arora A. Bioactives from fruit processing wastes: Green approaches to valuable chemicals. Food Chem 2016; 225:10-22. [PMID: 28193402 DOI: 10.1016/j.foodchem.2016.12.093] [Citation(s) in RCA: 167] [Impact Index Per Article: 20.9] [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: 08/02/2016] [Revised: 12/06/2016] [Accepted: 12/27/2016] [Indexed: 11/24/2022]
Abstract
Fruit processing industries contribute more than 0.5billion tonnes of waste worldwide. The global availability of this feedstock and its untapped potential has encouraged researchers to perform detailed studies on value-addition potential of fruit processing waste (FPW). Compared to general food or other biomass derived waste, FPW are found to be selective and concentrated in nature. The peels, pomace and seed fractions of FPW could potentially be a good feedstock for recovery of bioactive compounds such as pectin, lipids, flavonoids, dietary fibres etc. A novel bio-refinery approach would aim to produce a wider range of valuable chemicals from FPW. The wastes from majority of the extraction processes may further be used as renewable sources for production of biofuels. The literature on value addition to fruit derived waste is diverse. This paper presents a review of fruit waste derived bioactives. The financial challenges encountered in existing methods are also discussed.
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Affiliation(s)
- Jhumur Banerjee
- CTARA, IITB-Monash Research Academy, IIT Bombay, Mumbai, Maharashtra 400076, India
| | - Ramkrishna Singh
- CTARA, IITB-Monash Research Academy, IIT Bombay, Mumbai, Maharashtra 400076, India
| | - R Vijayaraghavan
- School of Chemistry, Faculty of Science, Monash University, Clayton Campus, VIC 3800, Australia
| | - Douglas MacFarlane
- School of Chemistry, Faculty of Science, Monash University, Clayton Campus, VIC 3800, Australia
| | - Antonio F Patti
- School of Chemistry, Faculty of Science, Monash University, Clayton Campus, VIC 3800, Australia
| | - Amit Arora
- CTARA, IITB-Monash Research Academy, IIT Bombay, Mumbai, Maharashtra 400076, India.
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Sheela D, Vijayaraghavan R, Senthilkumar S. A study on the safety evaluation of buphrenorphine administered through an autoinjector compared with manual injection using haematological and biochemical variables in rats. Hum Exp Toxicol 2016; 36:901-909. [PMID: 28838259 DOI: 10.1177/0960327116674528] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Buprenorphine drug cartridge was made for autoinjector device for use in emergency and critical situations to reduce the morbidity and mortality. Water-filled cartridges were prepared and buprenorphine was injected aseptically in the cartridge, to make 0.05 and 0.10 mg/mL. Rats were injected intraperitoneally, buprenorphine (0.3 and 0.6 mg/kg), repeatedly with the autoinjector and compared with manual injection (7 days and 14 days) using various haematological and biochemical parameters. No significant change was observed in the body weight, organ to body weight ratio and haematological variables in any of the experimental groups compared with the control group. Except serum urea and aspartate aminotransferase, no significant change was observed in glucose, cholesterol, triglycerides, bilirubin, protein, albumin, creatinine, uric acid, alanine aminotransferase, gamma glutamyltransferase and alkaline phosphatase. The autoinjectors deliver the drugs with spray effect and force for faster absorption. In the present study, the autoinjector meant for intramuscular injection was injected intraperitoneally in rats, and the drug was delivered with force on the vital organs. No significant difference was observed in the autoinjector group compared to the manual group showing tolerability and safety of the buphrenorphine autoinjector. This study shows that buprenorphine autoinjector can be considered for further research work.
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Affiliation(s)
- D Sheela
- Saveetha Medical College and Hospital, Saveetha University, Chennai, Tamil Nadu, India
| | - R Vijayaraghavan
- Saveetha Medical College and Hospital, Saveetha University, Chennai, Tamil Nadu, India
| | - S Senthilkumar
- Saveetha Medical College and Hospital, Saveetha University, Chennai, Tamil Nadu, India
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Abstract
Chemical and biological weapons can be used during conflicts and by terrorists to injure or kill humans and animals. Chemical weapons contain toxic chemicals and biological weapons contain pathogenic organisms. With proper protective equipments and training, the lethal effects of chemical and biological warfare agents can be minimised. First aid kit is available that contain detection, decontamination and medical protection for chemical warfare agents including autoinjectors, for rapid administration and faster absorption of drugs. The autoinjectors are safe and available for life saving drugs like atropine sulphate and pralidoxime chloride (nerve agent poisoning), epinephrine (anaphylaxis), diazepam (seizures) and sumatriptan (migraine). For bio-threat agents doxycycline alone is available as a broad spectrum antibiotic in the first aid kit. Majority of the bacterial agents are gram negative and hence amikacin drug cartridge was developed for the existing autoinjector. The advantage of amikacin is its safety, stability, can be given prophylactically and supplemented with other antibiotics when medical attention arrives. The usability and tolerability of amikacin administered repeatedly through autoinjector was studied using various haematological, biochemical and oxidative stress parameters in animal models. The results are promising and as there is no antibiotic autoinjector available, amikacin autoinjector can be considered for bio-threat agents.
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Kumar P, Vijayaraghavan R, Kulkarni AS, Pathak U, Raza SK, Jaiswal DK. In vivo protection by amifostine and DRDE-07 against sulphur mustard toxicity. Hum Exp Toxicol 2016; 21:371-6. [PMID: 12269699 DOI: 10.1191/0960327102ht250oa] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [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: 11/05/2022]
Abstract
The study was aimed at investigating the prophylactic efficacy of orally administered amifostine and a newly synthesized compound, S-2(2-amino-ethylamino)ethyl phenyl sulphide (DRDE-07), against dermally applied sulphur mustard (SM) in mice and rats. The LD50 values of amifostine and DRDE-07 were determined following oral and intraperitoneal routes and the LD50 of SM diluted in PEG-300 was determined following dermal route. Amifostine or DRDE-07 (equivalent to their 0.05 LD50, 0.10 LD50 and 0.20 LD50) dissolved in water was fed to mice and rats and, after 30 min, various doses of SM were applied to the hair-clipped area of the skin and were observed for 14 days for mortality. The protection index (PI) was calculated as a ratio of LD50 with treatment to LD50 without treatment. The estimated percutaneous LD50 of SM was found to be 8.1 and 2.4 mg///kg for female mice and male rats, respectively. A dose-related protection was observed with all the three doses of both compounds. Thirty minutes prior, the administration of amifostine in female mice offered a PI of 3.0 at the lowest pretreatment dose (52.5 mg// kg) followed by PI of 6.7 and 9.5 at 105 and 210 mg// /kg pretreatment doses, respectively. DRDE-07 offered better protection against SM in female mice, i.e., a PI of 4.8 at pretreatment dose of 62.5 mg// /kg, a PI of 12.0 at the dose of 124.7 mg///kg and a PI of 27.0 at the dose of 249.4 mg/kg. In male rats, DRDE-07 gave a PI of about 3.0 at all the three pretreatment doses (80, 160 and 320 mg///kg), whilst amifostine offered a PI of 3.1 at the highest pretreatment dose (452 mg///kg). The present study showed that oral administration of both amifostine and DRDE-07 was effective as a prophylactic agent for protecting against SM toxicity, and that DRDE-07 offered better protection.
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Affiliation(s)
- P Kumar
- Division of Pharmacology and Toxicology, Defence Research and Development Establishment, Gwalior, India.
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Vijayaraghavan R, Banumathi S. Bayesian Design of Special Type of Double Sampling Plans for Compliance Testing. COMMUN STAT-SIMUL C 2016. [DOI: 10.1080/03610918.2013.863923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Simons TJ, Verheyen T, Izgorodina EI, Vijayaraghavan R, Young S, Pearson AK, Pas SJ, MacFarlane DR. Mechanisms of low temperature capture and regeneration of CO2 using diamino protic ionic liquids. Phys Chem Chem Phys 2016; 18:1140-9. [DOI: 10.1039/c5cp05200a] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Carbon dioxide chemical absorption and regeneration was investigated in two protic ionic liquids using novel calorimetric techniques.
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Affiliation(s)
- Tristan J. Simons
- School of Chemistry
- Monash University
- Clayton 3800
- Australia
- Maritime Division
| | | | | | | | - Scott Young
- School of Chemistry
- Monash University
- Clayton 3800
- Australia
| | - Andrew K. Pearson
- School of Chemistry
- Monash University
- Clayton 3800
- Australia
- Maritime Division
| | - Steven J. Pas
- School of Chemistry
- Monash University
- Clayton 3800
- Australia
- Maritime Division
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44
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Rao J, Vijayaraghavan R, Chen F, Zhu H, Howlett PC, MacFarlane DR, Forsyth M. Protic organic ionic plastic crystals based on a difunctional cation and the triflate anion: a new solid-state proton conductor. Chem Commun (Camb) 2016; 52:14097-14100. [DOI: 10.1039/c6cc07154f] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [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
A new family of ammonium based organic ionic plastic crystals exhibits exciting solid-state proton conductivity.
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Affiliation(s)
- Jun Rao
- ARC Centre of Excellence for Electromaterials Science (ACES)
- Institute for Frontier Materials (IFM)
- Deakin University
- Burwood
- Australia
| | - R. Vijayaraghavan
- ARC Centre of Excellence for Electromaterials Science (ACES)
- Department of Materials Engineering
- Monash University
- Clayton
- Australia
| | - Fangfang Chen
- ARC Centre of Excellence for Electromaterials Science (ACES)
- Institute for Frontier Materials (IFM)
- Deakin University
- Burwood
- Australia
| | - Haijin Zhu
- ARC Centre of Excellence for Electromaterials Science (ACES)
- Institute for Frontier Materials (IFM)
- Deakin University
- Burwood
- Australia
| | - Patrick C. Howlett
- ARC Centre of Excellence for Electromaterials Science (ACES)
- Institute for Frontier Materials (IFM)
- Deakin University
- Burwood
- Australia
| | - Douglas R. MacFarlane
- ARC Centre of Excellence for Electromaterials Science (ACES)
- Department of Materials Engineering
- Monash University
- Clayton
- Australia
| | - Maria Forsyth
- ARC Centre of Excellence for Electromaterials Science (ACES)
- Institute for Frontier Materials (IFM)
- Deakin University
- Burwood
- Australia
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Nagpal BN, Ghosh SK, Eapen A, Srivastava A, Sharma MC, Singh VP, Parashar BD, Prakash S, Mendki MJ, Tikar SN, Saxena R, Gupta S, Tiwari SN, Ojha VP, Ravindran KJ, Ganesan K, Rao AN, Sharma RS, Tuli NR, Yadav NK, Vijayaraghavan R, Dua VK, Dash AP, Kaushik MP, Joshi PL, Valecha N. Control of Aedes aegypti and Ae. albopictus, the vectors of dengue and chikungunya, by using pheromone C21 with an insect growth regulator: Results of multicentric trials from 2007-12 in India. J Vector Borne Dis 2015; 52:224-231. [PMID: 26418653] [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: 06/05/2023] Open
Abstract
BACKGROUND & OBJECTIVES Aedes mosquito control has gained much importance nowadays in view of rise in number of reported cases of dengue and chikungunya in India and other countries. In the present study, C21 attracticide (containing a pheromone and an insect growth regulator—IGR, developed by Defence Research and Development Establishment (DRDE), Gwalior, India was tested for its feasibility for surveillance and control of Aedes mosquito in a multicentric mode from October 2007 to June 2012 in urban (Delhi, and Bengaluru district, Karnataka) and suburban (Alappuzha district, Kerala) settings of the country in three phases. METHODS Across the randomly selected households in each study area, two to four containers treated with attracticide (experimental) and untreated (control) were placed and monitored by trained surveillance workers on weekly/ fortnightly basis for determining the presence of eggs, larvae and pupae. Container positivity, percent larvae, egg and pupae collected were determined during different phases and analyzed statistically using SPSS 18.0. RESULTS Container positivity was found statistically significant at Bengaluru and Alappuzha, Kerala while in Delhi, it was found non-significant. Eggs collected from experimental containers were significantly higher in comparison to control at all the locations except Delhi. Also larvae collected from control containers were significantly higher at all the locations except Bengaluru. Pupae collected from control containers remained significantly higher at all the locations as no pupal formation was recorded from experimental containers. INTERPRETATION & CONCLUSION The use of C21 attracticide hampered pupal formation, thus inhibiting adult population in the study areas. The study established that C21 attracticide was efficacious in the field conditions and has potential for use in surveillance and management of dengue and chikungunya mosquitoes.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | - Rekha Saxena
- National Institute of Malaria Research, New Delhi, India
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Kumar SS, Saraswathi P, Vijayaraghavan R. Effect of bacopa monniera on cold stress induced neurodegeneration in hippocampus of wistar rats: a histomorphometric study. J Clin Diagn Res 2015; 9:AF05-7. [PMID: 25737970 PMCID: PMC4347061 DOI: 10.7860/jcdr/2015/10199.5423] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [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: 06/04/2014] [Accepted: 11/08/2014] [Indexed: 11/24/2022]
Abstract
INTRODUCTION Bacopa monniera/ Brahmi,is used over centuries in Ayurvedic medicine for memory development, learning, concentration and other mental illnesses such as nervousness and poor cognition. The present study aims to evaluate the effect of Bacopa monniera (Brahmi, BM) on cold stress induced histological changes in hippocampus of Wistar rats. MATERIALS AND METHODS Total 24 male rats divided into four groups were used (n=6) for this study. Group I was control in which rats were kept under ideal laboratory conditions, Group II was given 40 mg/kg of BM extract, Group III was cold water swim stress in which rats were forced to swim in the cold water maintained at 18±2(o)C till it started to sink for a period of one month and Group IV in which cold water swim stress given for a month followed by oral administration of BM extracts 40mg/kg treatment for a month. The whole study was carried out for a period of 60 d. The animals were sacrificed next day and their brains dissected out for histomorphometric analysis. The diameter, packing density and total number of neurons were calculated from stained histological section by using micrometry in the CA-1 region of the hippocampus. STATISTICAL ANALYSIS The analysis and plotting of graphs were carried out using Sigma Plot 12 (Systat Software Inc., USA). Values are expressed as Mean ± SEM (n = 6). One way analysis of variance followed by Student-Newman-Keul's multiple comparisons test was used for the comparison of means. A probability of 0.05 and less was taken as statistically significant. RESULTS The results showed that there is no significant difference in the diameter of the cells between the groups but total number of the cells in Group II was statistically significant when compared with the others groups. Student-Newman-Keuls method showed that Group II and Group IV are statistically significant when compared to Group III (p<0.05). CONCLUSION RESULTS indicates that when BM extracts administered orally produce neuroprotective effect in cold stress induced hippocampal neurodegeneration of rats. Hence, the herb BM can possibly be used as an adjuvant to improve memory to combat stress in our day to day life.
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Affiliation(s)
- Saravana S Kumar
- Lecturer, Department of Anatomy, Saveetha Dental College, Chennai, India
| | - P Saraswathi
- Professor, Department of Anatomy, Saveetha University, Chennai, India
| | - R Vijayaraghavan
- Professor, Department of Pharmacology and Research Director, Saveetha University, India
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Mazid RR, Cooper A, Zhang Y, Vijayaraghavan R, MacFarlane DR, Cortez-Jugo C, Cheng W. Enhanced enzymatic degradation resistance of plasmid DNA in ionic liquids. RSC Adv 2015. [DOI: 10.1039/c5ra05518k] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Buffered ionic liquids can substantially enhance enzymatic degradation resistance of plasmid DNA, indicating the potential to serve as next-generation biological storage buffer at ambient temperature.
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Affiliation(s)
- Romiza R. Mazid
- Department of Chemical Engineering
- Monash University Clayton
- Victoria
- Australia
| | - Alexandra Cooper
- Department of Chemical Engineering
- Monash University Clayton
- Victoria
- Australia
| | - Ying Zhang
- Department of Chemical Engineering
- Monash University Clayton
- Victoria
- Australia
| | | | | | - Christina Cortez-Jugo
- Monash Institute of Pharmaceutical Sciences
- Monash University Parkville
- Victoria 3052
- Australia
| | - Wenlong Cheng
- Department of Chemical Engineering
- Monash University Clayton
- Victoria
- Australia
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Mazid RR, Vijayaraghavan R, MacFarlane DR, Cortez-Jugo C, Cheng W. Inhibited fragmentation of mAbs in buffered ionic liquids. Chem Commun (Camb) 2015; 51:8089-92. [DOI: 10.1039/c5cc01877c] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Choline-based buffered ionic liquids have been demonstrated to greatly inhibit enzymatic degradation of antibodies, and are promising as next-generation biological buffers.
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Affiliation(s)
- Romiza R. Mazid
- Department of Chemical Engineering
- Monash University
- Clayton 3800
- Australia
| | - R. Vijayaraghavan
- Monash Institute of Pharmaceutical Sciences
- Monash University
- Parkville 3052
- Australia
| | | | | | - Wenlong Cheng
- Department of Chemical Engineering
- Monash University
- Clayton 3800
- Australia
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Jia X, Yang Y, Wang C, Zhao C, Vijayaraghavan R, MacFarlane DR, Forsyth M, Wallace GG. Biocompatible ionic liquid-biopolymer electrolyte-enabled thin and compact magnesium-air batteries. ACS Appl Mater Interfaces 2014; 6:21110-7. [PMID: 25380306 DOI: 10.1021/am505985z] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
With the surge of interest in miniaturized implanted medical devices (IMDs), implantable power sources with small dimensions and biocompatibility are in high demand. Implanted battery/supercapacitor devices are commonly packaged within a case that occupies a large volume, making miniaturization difficult. In this study, we demonstrate a polymer electrolyte-enabled biocompatible magnesium-air battery device with a total thickness of approximately 300 μm. It consists of a biocompatible polypyrrole-para(toluene sulfonic acid) cathode and a bioresorbable magnesium alloy anode. The biocompatible electrolyte used is made of choline nitrate (ionic liquid) embedded in a biopolymer, chitosan. This polymer electrolyte is mechanically robust and offers a high ionic conductivity of 8.9 × 10(-3) S cm(-1). The assembled battery delivers a maximum volumetric power density of 3.9 W L(-1), which is sufficient to drive some types of IMDs, such as cardiac pacemakers or biomonitoring systems. This miniaturized, biocompatible magnesium-air battery may pave the way to a future generation of implantable power sources.
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Affiliation(s)
- Xiaoteng Jia
- Intelligent Polymer Research Institute, ARC Centre of Excellence for Electromaterials Science, University of Wollongong , Wollongong 2522, Australia
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Vijayaraghavan R, Selvaraj R, Krishna Mohan S, Gopi P. Haematological and Biochemical Changes in Response to Stress Induced by the Administration of Amikacin Injection by Autoinjector in Animals. DEFENCE SCI J 2014. [DOI: 10.14429/dsj.64.5032] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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