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Karthika P, Shanmuganathan S, Subramanian V, Delerue-Matos C. Selective detection of salivary cortisol using screen-printed electrode coated with molecularly imprinted polymer. Talanta 2024; 272:125823. [PMID: 38422908 DOI: 10.1016/j.talanta.2024.125823] [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: 05/31/2023] [Revised: 02/18/2024] [Accepted: 02/21/2024] [Indexed: 03/02/2024]
Abstract
A novel electrochemical sensor was developed for the detection of salivary cortisol levels. The sensor employs a combination of a molecularly imprinted polymer (MIP) and gold nanoparticles (AuNPs) that are electrodeposited onto a screen-printed electrode (SPE). The study utilised density functional theory and molecular docking techniques to determine the geometry of molecular orbitals, electrostatic potential energies, and binding energy of cortisol and the polymers. The thin film of cortisol-imprinted polymer on the SPE was created by electro-polymerizing pyrrole and thiophene-3-carboxylic acid on the electrode surface along with cortisol as the template molecule. The MIP film was characterised using scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), and electrochemical techniques. The sensor exhibited a linear response in the concentration range of 0.05 nmol L-1 to 2.5 μmol L-1, with a limit of detection of 0.01 nmol L-1, as determined by differential pulse voltammetry. This method offers a simple yet efficient and sensitive approach to detecting cortisol levels in human saliva samples.
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Affiliation(s)
- Palanisamy Karthika
- Department of Industrial Chemistry, Alagappa University, Karaikudi, 630 003, Tamil Nadu, India
| | | | - Viswanathan Subramanian
- Department of Industrial Chemistry, Alagappa University, Karaikudi, 630 003, Tamil Nadu, India.
| | - Cristina Delerue-Matos
- REQUIMTE/LAQV, ISEP, Polytechnic of Porto, Rua Dr. António Bernardino de Almeida 431, 4249-015, Porto, Portugal
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Thasneem CK, Vijayasankar GR, Venkateswarlu BS, Chandira RM, Shanmuganathan S. In vitro Antioxidant Activity and Preliminary Phytochemical Evaluation of Different Extracts of Aerva javanica. Pharmacognosy Res 2022. [DOI: 10.5530/pres.14.4.68] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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Karthika P, Shanmuganathan S, Viswanathan S, Delerue-Matos C. Molecularly imprinted polymer-based electrochemical sensor for the determination of endocrine disruptor bisphenol-A in bovine milk. Food Chem 2021; 363:130287. [PMID: 34120051 DOI: 10.1016/j.foodchem.2021.130287] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2021] [Revised: 05/08/2021] [Accepted: 06/01/2021] [Indexed: 12/21/2022]
Abstract
Bisphenol A (BPA) contamination from food packaging material has been a major concern in recent years, due to its potential endocrine-disrupting effects on humans, especially infants and children. This paper reports the detection of BPA using an electrochemical sensor based on molecularly imprinted polymer (MIP). Electrochemically reduced graphene oxide coated glassy carbon electrode used for this study. Density functional theory (DFT) at B3LYP/6-31 + G (d,p) level was used to calculate the molecular-level interaction between BPA and MIP. The pyrrole electrochemically polymerized in the presence of template molecule BPA on the electrode surface. BPA imprinted cavities were formed by removing entrapped BPA molecules from the polypyrrole film. MIP electrode was used for the determination of BPA in standard and real samples by differential pulse voltammetry. The peak current shows the linear relationship to the logarithmic concentration of BPA between 750 and 0.5 nmolL-1 with a correlation coefficient, R2 = 0.992. The limit of detection was found to be 0.2 nmolL-1 (S/N = 3). The reproducibility and repeatability of the sensor were also studied.
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Affiliation(s)
- Palanisamy Karthika
- Department of Industrial Chemistry, Alagappa University, Karaikudi 630 003, Tamil Nadu, India
| | | | - Subramanian Viswanathan
- Department of Industrial Chemistry, Alagappa University, Karaikudi 630 003, Tamil Nadu, India.
| | - Cristina Delerue-Matos
- REQUIMTE/LAQV, Polytechnic of Porto - School of Engineering, Rua Dr. António Bernardino de Almeida, 4249-015 Porto, Portugal
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Sircar S, Malik YS, Kumar P, Ansari MI, Bhat S, Shanmuganathan S, Kattoor JJ, Vinodhkumar O, Rishi N, Touil N, Ghosh S, Bányai K, Dhama K. Genomic Analysis of an Indian G8P[1] Caprine Rotavirus-A Strain Revealing Artiodactyl and DS-1-Like Human Multispecies Reassortment. Front Vet Sci 2021; 7:606661. [PMID: 33585597 PMCID: PMC7873603 DOI: 10.3389/fvets.2020.606661] [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] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Accepted: 12/14/2020] [Indexed: 12/03/2022] Open
Abstract
The surveillance studies for the presence of caprine rotavirus A (RVA) are limited in India, and the data for the whole-genome analysis of the caprine RVA is not available. This study describes the whole-genome-based analysis of a caprine rotavirus A strain, RVA/Goat-wt/IND/K-98/2015, from a goat kid in India. The genomic analysis revealed that the caprine RVA strain K-98, possess artiodactyl-like and DS-1 human-like genome constellation G8P[1]-I2-R2-C2-M2-A3-N2-T6-E2-H3. The three structural genes (VP2, VP4, and VP7) were close to caprine host having nucleotide-based identity range between 97.5 and 98.9%. Apart from them, other gene segments showed similarity with either bovine or human like genes, ultimately pointing toward a common evolutionary origin having an artiodactyl-type backbone of strain K-98. Phylogenetically, the various genes of the current study isolate also clustered inside clades comprising Human-Bovine-Caprine isolates from worldwide. The current findings add to the knowledge on caprine rotaviruses and might play a substantial role in designing future vaccines or different alternative strategies combating such infections having public health significance. To the best of our knowledge, this is the first report on the whole-genome characterization of a caprine RVA G8P[1] strain from India. Concerning the complex nature of the K-98 genome, whole-genome analyses of more numbers of RVA strains from different parts of the country are needed to comprehend the genomic nature and genetic diversity among caprine RVA.
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Affiliation(s)
- Shubhankar Sircar
- Division of Biological Standardization, Indian Council of Agricultural Research-Indian Veterinary Research Institute, Bareilly, India
- Amity Institute of Virology and Immunology, J-3 Block, Amity University, Noida, India
| | - Yashpal Singh Malik
- Division of Biological Standardization, Indian Council of Agricultural Research-Indian Veterinary Research Institute, Bareilly, India
- College of Animal Biotechnology, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, India
| | - Prashant Kumar
- Amity Institute of Virology and Immunology, J-3 Block, Amity University, Noida, India
| | - Mohd Ikram Ansari
- Division of Biological Standardization, Indian Council of Agricultural Research-Indian Veterinary Research Institute, Bareilly, India
| | - Sudipta Bhat
- Division of Biological Standardization, Indian Council of Agricultural Research-Indian Veterinary Research Institute, Bareilly, India
| | - S. Shanmuganathan
- Division of Biological Standardization, Indian Council of Agricultural Research-Indian Veterinary Research Institute, Bareilly, India
| | - Jobin Jose Kattoor
- Animal Disease Diagnsotic Laboratory, Purdue University, West Lafayette, IN, United States
| | - O.R. Vinodhkumar
- Division of Epidemiology, Indian Council of Agricultural Research-Indian Veterinary Research Institute, Bareilly, India
| | - Narayan Rishi
- Amity Institute of Virology and Immunology, J-3 Block, Amity University, Noida, India
| | - Nadia Touil
- Laboratoire de Recherche et de Biosécurité, Hôpital Militaire d'instruction Med V de Rabat, Rabat, Morocco
| | - Souvik Ghosh
- Department of Biomedical Sciences, One Health Center for Zoonoses and Tropical Veterinary Medicine, Ross University School of Veterinary Medicine, Basseterre, Saint Kitts and Nevis
| | - Krisztián Bányai
- Centre for Agricultural Research, Institute for Veterinary Medical Research, Hungarian Academy of Sciences, Budapest, Hungary
| | - Kuldeep Dhama
- Division of Pathology, Indian Council of Agricultural Research-Indian Veterinary Research Institute, Bareilly, India
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Shanmuganathan S, Mustapha FI, Wilson A. Evaluation of sustainability of non-communicable diseases risk factor program in Malaysia. Eur J Public Health 2020. [DOI: 10.1093/eurpub/ckaa166.1142] [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: 11/14/2022] Open
Abstract
Abstract
Background
Non-communicable diseases (NCDs) in Malaysia have risen substantially over the last two decades. We aimed to (i) evaluate the sustainability of the existing NCDs risk factor program implemented under the National Strategic Plan and (ii) identify challenges and factors impeding the sustainability of the NCDs program.
Methods
A mixed-method approach using a combination of the Program Sustainability Assessment Tool
with 40-item instrument assessing 8 domains (organizational capacity, program adaptation, program evaluation, communications, strategic planning, funding stability, environmental support and partnerships) and 5 open-ended questions were administered to 80 key managers from district directors of chronic disease programs in Malaysia. The mean score for each of the 8 sustainability domains and the overall mean sustainability score were determined. Data analysis was performed using Statistical Package for the Social Sciences (SPSS) version 25.
Results
Seven domains scored a mean of ≥ 4. The domains of communications (cross-site mean, 4.5 on a scale of 1-7) and organizational capacity (mean, 4.4) had the highest ratings. Funding stability had the lowest rating (mean, 3.8). The overall mean sustainability score was 4.2. Open-ended responses revealed challenges by program leaders, including implementation difficulties, factors impede planning for NCDs sustainability program, lack of financial, staff support and staff training which are largely consistent with the scaled domains.
Conclusions
Capacity issues affecting the sustainability of NCDs program in Malaysia are qualitatively similar to other countries. Future work should aim at improving funding stability and integrating evidence-based public health strategies to sustain implemented NCDs program.
Key messages
Researchers could utilize this tool to assess program design and strategies promoting sustainability during implementation process for long term program sustainment. Investments in leadership support for integrating program evaluation into implementation and greater funding flexibility may enhance sustainability of evidence-based public health program for NCDs.
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Affiliation(s)
- S Shanmuganathan
- Menzies Centre for Health Policy, The University of Sydney, Sydney, Australia
| | - F I Mustapha
- Disease Control Division, Ministry of Health, Putrajaya, Malaysia
| | - A Wilson
- Menzies Centre for Health Policy, The University of Sydney, Sydney, Australia
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Thangasamy P, Shanmuganathan S, Subramanian V. A NiCo-MOF nanosheet array based electrocatalyst for the oxygen evolution reaction. Nanoscale Adv 2020; 2:2073-2079. [PMID: 36132501 PMCID: PMC9417630 DOI: 10.1039/d0na00112k] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Accepted: 04/01/2020] [Indexed: 06/11/2023]
Abstract
Metal organic frameworks (MOFs) are excellent materials for energy storage and conversion. This report describes 2D metal-organic framework nanosheets as an electrocatalyst for the oxygen evolution reaction (OER) under alkaline conditions. An ultrathin nanosheet array of a NiCo-metal-organic framework was grown on nickel foam (NiCo-MOF/NF) by a one-step solvothermal method. The catalytic OER of the NiCO-MOF/NF electrode was analysed by electrochemical methods. The resulting NiCO-MOF/NF exhibited a high current density (50 mA cm-2) with an overpotential of 270 mV, a Tafel slope of 35.4 mV dec-1 and a high turnover frequency (TOF) of 0.68 s-1 (η = 0.27 V) towards the OER. The excellent catalytic activity of the MOF towards the OER was due to the two-dimensional nanosheet array of NiCo-MOF with plentiful accessible molecular active sites and excellent mass transport properties. Faster electron transport was also achieved due to the synergetic effect of Co and Ni present on the MOF.
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Affiliation(s)
- Ponmuthuselvi Thangasamy
- Department of Industrial Chemistry, School of Chemical Sciences, Alagappa University Karaikudi-630003 Tamil Nadu India
| | - Saravanakumar Shanmuganathan
- Department of Industrial Chemistry, School of Chemical Sciences, Alagappa University Karaikudi-630003 Tamil Nadu India
| | - Viswanathan Subramanian
- Department of Industrial Chemistry, School of Chemical Sciences, Alagappa University Karaikudi-630003 Tamil Nadu India
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Koushik AK, Ganesh P, Shanmuganathan S. Incidence of Cirrhotic Cardiomyopathy among Hundred Patients of Tamil Nadu, India- A Cross-sectional Study. J Clin Diagn Res 2020. [DOI: 10.7860/jcdr/2020/46768.14278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Introduction: Cardiac dysfunction in cirrhosis may affect quality of life, prognosis and also may aggravate the course in patients undergoing invasive procedures such as surgery, insertion of a Transjugular Intrahepatic Portosystemic Shunts (TIPS), and liver transplantation. Aim: To evaluate the association of cardiomyopathy in cirrhotic patients of Tamil Nadu region in India. Materials and Methods: This cross-sectional study included 100 diagnosed cirrhotic patients. The patient’s cardiac status was obtained from Electrocardiography (ECG) and echocardiography. Liver profile was obtained from biochemical assays and ultrasonography of abdomen. The patients were classified as per cirrhosis grading system, Child Toucotte Pugh (CTP) scoring. The association was analysed using frequency analysis, percentage analysis and Chi-square test. Results: Prolonged QTc (>0.44 sec) was seen in 35% of the study population (p-value-0.014). A 10% of patients had systolic dysfunction and 25% showed diastolic dysfunction. Also, these patients showed positive troponin T and elevated Brain Natriuretic Peptide (BNP). The incidence of cardiomyopathy in cirrhotic patients was 28% in this study. Conclusion: This study established 28% incidence of cardiomyopathy in cirrhotic patients. This association may further be evaluated in larger study samples to provide a better prognosis and quality of life in cirrhotic patients treated with liver transplantation or other surgical procedures.
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Ullah F, Shanmuganathan S, Schindler C, Jones PG, Heinicke JW. Influence of pyrido-annulation on N,N′-dineopentyl-imidazolin-2-ylidene and associated transition metal complexes; comparison with benzo-, naphtho- and quinoxalino-annulation. J Organomet Chem 2019. [DOI: 10.1016/j.jorganchem.2019.04.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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9
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van 't Sant I, van Eden WJ, Engbersen MP, Kok NFM, Woensdregt K, Lambregts DMJ, Shanmuganathan S, Beets-Tan RGH, Aalbers AGJ, Lahaye MJ. Diffusion-weighted MRI assessment of the peritoneal cancer index before cytoreductive surgery. Br J Surg 2018; 106:491-498. [PMID: 30353920 DOI: 10.1002/bjs.10989] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2018] [Revised: 07/17/2018] [Accepted: 07/31/2018] [Indexed: 01/09/2023]
Abstract
BACKGROUND Patients with limited peritoneal metastases from colorectal cancer may be candidates for an aggressive surgical approach including cytoreductive surgery and hyperthermic intraperitoneal chemotherapy (CRS-HIPEC). Selection is based on surgical inspection during laparoscopy or laparotomy. The aim of this study was to investigate whether diffusion-weighted MRI (DW-MRI) can be used to select patients for CRS-HIPEC. METHODS This was a prospective study at a tertiary referral centre. Patients with confirmed or suspected colorectal peritoneal metastases scheduled for exploratory laparotomy or laparoscopy were eligible. Two radiologists assessed the peritoneal cancer index (PCI) on CT (CT-PCI) and DW-MRI (MRI-PCI). The reference standard was PCI at surgery. Radiologists were blinded to the surgical PCI and to each other's findings. The main outcome was the accuracy of DW-MRI in predicting whether patients had resectable disease (PCI less than 21) or not. RESULTS Fifty-six patients were included in the study, of whom 49 could be evaluated. The mean(s.d.) PCI at surgery was 11·27(7·53). The mean MRI-PCI was 10·18(7·07) for reader 1 and 8·59(7·08) for reader 2. Readers 1 and 2 correctly staged 47 of 49 and 44 of 49 patients respectively (accuracy 96 and 90 per cent). Both readers detected all patients with resectable disease with a PCI below 21 at surgery (sensitivity 100 per cent). No patient was overstaged. The intraclass correlation (ICC) between readers was excellent (ICC 0·91, 95 per cent c.i. 0·77 to 0·96). MRI-PCI had a stronger correlation with surgical PCI (ICC 0·83-0·88) than did CT-PCI (ICC 0·39-0·44). CONCLUSION DW-MRI is a promising non-invasive tool to guide treatment selection in patients with peritoneal metastases from colorectal cancer.
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Affiliation(s)
- I van 't Sant
- Department of Radiology, Netherlands Cancer Institute, Amsterdam, The Netherlands.,GROW School for Oncology and Developmental Biology, Maastricht University Medical Centre, Maastricht, The Netherlands
| | - W J van Eden
- Department of Surgical Oncology, Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - M P Engbersen
- Department of Radiology, Netherlands Cancer Institute, Amsterdam, The Netherlands.,GROW School for Oncology and Developmental Biology, Maastricht University Medical Centre, Maastricht, The Netherlands
| | - N F M Kok
- Department of Surgical Oncology, Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - K Woensdregt
- Department of Surgical Oncology, Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - D M J Lambregts
- Department of Radiology, Netherlands Cancer Institute, Amsterdam, The Netherlands.,GROW School for Oncology and Developmental Biology, Maastricht University Medical Centre, Maastricht, The Netherlands
| | - S Shanmuganathan
- Department of Radiology, Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - R G H Beets-Tan
- Department of Radiology, Netherlands Cancer Institute, Amsterdam, The Netherlands.,GROW School for Oncology and Developmental Biology, Maastricht University Medical Centre, Maastricht, The Netherlands
| | - A G J Aalbers
- Department of Surgical Oncology, Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - M J Lahaye
- Department of Radiology, Netherlands Cancer Institute, Amsterdam, The Netherlands.,GROW School for Oncology and Developmental Biology, Maastricht University Medical Centre, Maastricht, The Netherlands
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Mani M, Srikanth P, Gnanskandan S, Vijayaraghavan S, Shanmuganathan S. Mutations in Hepatitis B virus polymerase gene/partial surface gene among Chronic HBV carriers as markers for anti-viral drug resistance and escape mutants. Can J Biotech 2017. [DOI: 10.24870/cjb.2017-a85] [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: 11/20/2022] Open
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Yasam VR, Jakki SL, Senthil V, Eswaramoorthy M, Shanmuganathan S, Arjunan K, Nanjan MJ. A pharmacological overview of lamotrigine for the treatment of epilepsy. Expert Rev Clin Pharmacol 2016; 9:1533-1546. [DOI: 10.1080/17512433.2016.1254041] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Shanmuganathan S, Thanawala V. Ultrasound-Guided Regional Anesthesia in Children (A Practical Guide). Br J Anaesth 2016. [DOI: 10.1093/bja/aew155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Osmani RAM, Kulkarni PK, Shanmuganathan S, Hani U, Srivastava A, M P, Shinde CG, Bhosale RR. A 32full factorial design for development and characterization of a nanosponge-based intravaginal in situ gelling system for vulvovaginal candidiasis. RSC Adv 2016. [DOI: 10.1039/c5ra26218f] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
The rationale behind present research effort was to enhance CTZ solubility and efficacyviaforming complex with hydroxypropyl β-cyclodextrin (HP-β-CD) nanosponges.
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Affiliation(s)
- Riyaz Ali M. Osmani
- Department of Pharmaceutics
- JSS College of Pharmacy
- JSS University
- Mysuru-570 015
- India
| | | | - S. Shanmuganathan
- Department of Pharmaceutics
- College of Pharmacy
- Sri Ramchandra University
- Chennai-600 116
- India
| | - Umme Hani
- Department of Pharmaceutics
- JSS College of Pharmacy
- JSS University
- Mysuru-570 015
- India
| | - Atul Srivastava
- Department of Pharmaceutics
- JSS College of Pharmacy
- JSS University
- Mysuru-570 015
- India
| | - Prerana M
- Faculty of Life Science
- JSS University
- Mysuru-570 015
- India
| | - Chetan G. Shinde
- Department of Pharmaceutics
- JSS College of Pharmacy
- JSS University
- Mysuru-570 015
- India
| | - Rohit R. Bhosale
- Department of Pharmaceutics
- JSS College of Pharmacy
- JSS University
- Mysuru-570 015
- India
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Gupta I, Ouhtit A, Fernando A, Abd Elmageed Z, Shanmuganathan S. CD146/Akt/NF-kappa-B/Latexin, a novel pathway suppressing breast tumor growth. Ann Oncol 2015; 26:iii31. [DOI: 10.1093/annonc/mdv121.05] [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: 09/02/2023] Open
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Ouhtit A, Fernando A, Elmageed ZA, Gupta I, Shanmuganathan S. P233 CD146/Akt/NF-κB/latexin is a novel pathway involved in suppressing breast tumor growth. Breast 2015. [DOI: 10.1016/s0960-9776(15)70265-1] [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: 10/23/2022] Open
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Gupta I, Shanmuganathan S, Ouhtit A. 370 Discovery of the genes that underpin the transition to malignant phenotype of breast tissues in a highly consanguineous region. Eur J Cancer 2014. [DOI: 10.1016/s0959-8049(14)70496-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Ouhtit A, Gupta I, Shanmuganathan S, Al-Kindy I, Al-Riyami H. Molecular mechanisms underpinning the effectiveness of the combination of camel milk and urine in the clearance of breast cancer cells. PharmaNutrition 2014. [DOI: 10.1016/j.phanu.2013.11.122] [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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Ouhtit A, Gupta I, Fernando A, Gaur R, Shanmuganathan S, Al-Riyami H, Raj M. CD146 Suppresses Breast Tumor Invasion via its Novel Downstream Transcriptional Target Gene, TIMPV. Ann Oncol 2014. [DOI: 10.1093/annonc/mdu070.2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Gupta I, Abdraboh M, Hollenbach A, Shanmuganathan S, Al-Riyami H, Raj M, Ouhtit A. The Interplay Between the Cell Adhesion Molecules CD44 and CD146 in Breast Cancer Metastasis. Ann Oncol 2014. [DOI: 10.1093/annonc/mdu070.4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Al-Riyami H, Gupta I, Madani S, Shanmuganathan S, Abdraboh ME, Al-Farsi Y, Raj M, Ouhtit A. TGF-β2, a Novel Target of CD44-Promoted Breast Cancer Invasion. Ann Oncol 2014. [DOI: 10.1093/annonc/mdu070.3] [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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Al-Riyami H, Madani S, Gupta I, Shanmuganathan S, Abdraboh ME, Al-Farsi Y, Raj MHG, Ouhtit A. Abstract P6-04-16: TGF-b2, a novel target of CD44-promoted breast cancer invasion. Cancer Res 2013. [DOI: 10.1158/0008-5472.sabcs13-p6-04-16] [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
Hyaluronan (HA) mediates communication between cancer cells and the environment via interactions with the cell surface receptor CD44. We have previously shown that CD44-HA interaction in BC cells promotes adhesion to bone marrow endothelial cells. This suggests that HA/CD44 signalling may be correlated with breast cancer (BC) metastasis. The long-term objective of this study is to increase our understanding of the mechanisms by which CD44-HA interaction promotes BC metastasis, and further identify and validate CD44-downstream transcriptional targets for anti-metastatic therapy.
Pursuant to this goal, we have developed a tetracycline (tet)-regulated expression of CD44 gene in the BC cell line MCF-7 (B5 clone) and identified TGF-beta2 (Transforming Growth Factor beta-2; 3 fold induction) as a potential CD44s-downstream transcriptional target by microarray analysis. To further validate this finding, the same RNA samples, used for microarray analysis and their corresponding protein lysates collected from the BC cell line MCF-7-B5, were examined for CD44 expression in the presence of HA for 18, 24, and 48 hr post-tet withdrawal. Expression of TGF-beta 2 was examined using RT-PCR and western-Blot analyses.
Our results showed that TGF-beta2 mRNA levels were significantly elevated following the removal of tet at 18, 24, and 48 h post-HA stimulation compared to the parental cells. Furthermore, the TGF-beta2 precursor protein increased in a time-dependent pattern upon HA-stimulation and in the absence of tet. More interestingly, inhibition of CD44 gene by RNAi method decreased TGF-beta2 expression upon HA-stimulation and in the absence of tet.
Our data strongly support the hypothesis that TGF-beta2 is a potential target of HA/CD44- downstream-signaling mediating BC cell invasion. Ongoing investigation aims to elucidate the signal transduction pathways coupling CD44 to the regulation of TGF-beta2 expression, and further validate CD44/TGF-beta2 axes in breast tumor invasion and metastasis.
Citation Information: Cancer Res 2013;73(24 Suppl): Abstract nr P6-04-16.
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Affiliation(s)
- H Al-Riyami
- College of Medicine and Health Sciences, Sultan Qaboos University, Muscat; LSU Health Sciences Center, New Orleans, LA
| | - S Madani
- College of Medicine and Health Sciences, Sultan Qaboos University, Muscat; LSU Health Sciences Center, New Orleans, LA
| | - I Gupta
- College of Medicine and Health Sciences, Sultan Qaboos University, Muscat; LSU Health Sciences Center, New Orleans, LA
| | - S Shanmuganathan
- College of Medicine and Health Sciences, Sultan Qaboos University, Muscat; LSU Health Sciences Center, New Orleans, LA
| | - ME Abdraboh
- College of Medicine and Health Sciences, Sultan Qaboos University, Muscat; LSU Health Sciences Center, New Orleans, LA
| | - Y Al-Farsi
- College of Medicine and Health Sciences, Sultan Qaboos University, Muscat; LSU Health Sciences Center, New Orleans, LA
| | - MHG Raj
- College of Medicine and Health Sciences, Sultan Qaboos University, Muscat; LSU Health Sciences Center, New Orleans, LA
| | - A Ouhtit
- College of Medicine and Health Sciences, Sultan Qaboos University, Muscat; LSU Health Sciences Center, New Orleans, LA
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22
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Johir MA, Shanmuganathan S, Vigneswaran S, Kandasamy J. Performance of submerged membrane bioreactor (SMBR) with and without the addition of the different particle sizes of GAC as suspended medium. Bioresour Technol 2013; 141:13-18. [PMID: 23545069 DOI: 10.1016/j.biortech.2013.03.032] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2012] [Revised: 03/04/2013] [Accepted: 03/07/2013] [Indexed: 06/02/2023]
Abstract
In this study the effect of different particle sizes of granular activated carbon (GAC) on the performance of a submerged membrane bioreactor (SMBR) was investigated. The sizes of GAC used were 150-300, 300-600 and 600-1200 μm. The SMBR was operated at a filtration flux of 20 L/m(2)h. The removal of dissolved organic carbon (DOC) and chemical oxygen demand (COD) with the addition of GAC was 95%. The concentration of biopolymers, humic, building block and low molecular weight neutral and acids in the SMBR effluent was reduced by 20%, 66-76%, 20-50%, 30-56%, respectively. It helped to reduce the sludge volume index (SVI) and transmembrane pressure (TMP) development by 30-40% and 58%, respectively. However, the removal of NH₄(+) and PO₄(3-) was relatively low of 35-45% and 34-43%, respectively. The SMBR effluent was rich in PO₄(3-) and was removed/recovered using hydrated ferric oxide (HFO). The removal of PO₄(3-) was almost 90%.
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Affiliation(s)
- M A Johir
- Faculty of Engineering and Information Technology, University of Technology, Sydney, Broadway, NSW 2007, Australia
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23
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Gupta I, Madani S, Abdraboh M, Al RH, Muzumdar S, AbdElmageed Z, Shanmuganathan S, Bhat S, Ramkumar A, Hakkim L, Ouhtit A. Abstract P4-06-16: TGF-β2, A Novel Target of CD44-Promoted Breast Cancer Invasion. Cancer Res 2012. [DOI: 10.1158/0008-5472.sabcs12-p4-06-16] [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
Background: Hyaluronan (HA) mediates communication between cancer cells and the environment via interactions with the cell surface receptor CD44. We have previously shown that CD44-HA interaction in BC cells promotes adhesion to bone marrow endothelial cells. This suggests that HA/CD44 signalling may be correlated with breast cancer (BC) metastasis. The long-term objective of this study is to increase our understanding of the mechanisms by which CD44-HA interaction promotes BC metastasis, and further identify and validate CD44-downstream transcriptional targets for anti-metastatic therapy.
Materials & Methods: Pursuant to this goal, we have developed a tetracycline (tet)-regulated expression of CD44 gene in the BC cell line MCF-7 (B5 clone) and identified TGF-β2 (Transforming Growth Factor beta-2; 3 fold induction) as a potential CD44s-downstream transcriptional target by microarray analysis. To further validate this finding, the same RNA samples, used for microarray analysis and their corresponding protein lysates collected from the BC cell line MCF-7-B5, were examined for CD44 expression in the presence of HA for 18, 24, and 48 hr post-tet withdrawal. Expression of TGF-β2 was examined using RT-PCR and western-Blot analyses.
Results: Our results showed that TGF-β2 mRNA levels were significantly elevated following the removal of tet at 18, 24, and 48 h post-HA stimulation compared to the parental cells. Furthermore, the TGF-β2 precursor protein increased in a time-dependent pattern upon HA-stimulation and in the absence of tet. More interestingly, inhibition of CD44 gene by RNAi method decreased TGF-β2 expression upon HA-stimulation and in the absence of tet.
Conclusion: Our data strongly support the hypothesis that TGF-β2 is a potential target of HA/CD44- downstream-signaling mediating BC cell invasion. Ongoing investigation aims to elucidate the signal transduction pathways coupling CD44 to the regulation of TGF-β2 expression, and further validate CD44/TGF-β2 axes in breast tumor invasion and metastasis.
Citation Information: Cancer Res 2012;72(24 Suppl):Abstract nr P4-06-16.
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Affiliation(s)
- I Gupta
- College of Medicine and Health Sciences, Sultan Qaboos University, Muscat, Al Khuwd, Oman
| | - S Madani
- College of Medicine and Health Sciences, Sultan Qaboos University, Muscat, Al Khuwd, Oman
| | - M Abdraboh
- College of Medicine and Health Sciences, Sultan Qaboos University, Muscat, Al Khuwd, Oman
| | - Riyami H Al
- College of Medicine and Health Sciences, Sultan Qaboos University, Muscat, Al Khuwd, Oman
| | - S Muzumdar
- College of Medicine and Health Sciences, Sultan Qaboos University, Muscat, Al Khuwd, Oman
| | - Z AbdElmageed
- College of Medicine and Health Sciences, Sultan Qaboos University, Muscat, Al Khuwd, Oman
| | - S Shanmuganathan
- College of Medicine and Health Sciences, Sultan Qaboos University, Muscat, Al Khuwd, Oman
| | - S Bhat
- College of Medicine and Health Sciences, Sultan Qaboos University, Muscat, Al Khuwd, Oman
| | - A Ramkumar
- College of Medicine and Health Sciences, Sultan Qaboos University, Muscat, Al Khuwd, Oman
| | - L Hakkim
- College of Medicine and Health Sciences, Sultan Qaboos University, Muscat, Al Khuwd, Oman
| | - A Ouhtit
- College of Medicine and Health Sciences, Sultan Qaboos University, Muscat, Al Khuwd, Oman
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24
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Shanmuganathan S, AbdElmageed Z, Fernando A, Gaur R, Ramkumar A, Bhat S, Gupta I, Muzumdar S, Hakkim L, Ouhtit A. Abstract P4-06-14: CD146-suppresses breast tumor invasion via a novel transcription target TIMPv. Cancer Res 2012. [DOI: 10.1158/0008-5472.sabcs12-p4-06-14] [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
The function of the cell adhesion receptor CD146, a recently discovered marker of endothelial cells and a tumor promoter of melanoma and other cancers, is controversial in breast cancer (BC). However several lines of evidence supports its role as a tumor suppressor in BC. Further, the molecular mechanisms underpinning this suppression are unknown, neither has the ligand for CD146 been identified. Using a novel validated Enhanced Green Fluorescent Protein (EGFP)-inducible systems of CD146 expression both in vitro and in vivo, we provide here molecular and functional evidence of CD146 and its novel transcriptional target TIMPv (a variant of tissue inhibitor of metallo-proteinases) in underpinning the suppression of BC invasion.
Tetracycline (tet-on) CD146 system was developed in both MCF-7 and MDA-231 BC founder cell lines, and validated using time course RT-PCR and western blot analyses, and fluorescent microscopy. In functional experiments, induction of CD146 inhibited BC cell migration and invasion. TIMPv, the only endogenous protein inhibitor known for metallocarboxypeptidases, was identified by expression profiling as a novel transcriptional target of CD146-signaling, an association validated by quantitative PCR and immunoblotting experiments in a range of breast and melanoma cancer cells. However, siRNA inhibition of CD146 in the SKMel-28 melanoma cell line increased TIMPv expression, suggesting that while TIMPv is a positive transcriptional target of CD146 in BC cells, it is negatively regulated in melanoma cells. Furthermore, using invasion assay, the functional relevance of TIMPv to CD146-suppressed metastasis was demonstrated by selective suppression of TIMPv in CD146-expressing BC inducible cells using RNAi. More interestingly, induction of CD146 expression in vivo, using the tet-on CD146 expression system in BC Xenograft model resulted in suppression of breast tumor growth. Further, Clinical analysis of breast tissue samples by Immunohistochemistry showed that TIMPv expression patterns paralleled those of CD44s during breast tumor progression. Pharmacological and molecular approaches revealed that the activation of NFκB via Akt pathway couples CD146 to the transcription of TIMPv in BC cells.
Our study is the first report to provide a functional molecular link of a novel transcriptional target of CD146, TIMPv, to cancer via a unique axis that underpin CD146-suppressed BC progression; TIMPv is a potential target for guiding the development of novel therapeutic strategies for BC.
Citation Information: Cancer Res 2012;72(24 Suppl):Abstract nr P4-06-14.
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Affiliation(s)
| | | | - A Fernando
- Sultan Qaboos University, Al-Khod, Seeb, Oman
| | - R Gaur
- Sultan Qaboos University, Al-Khod, Seeb, Oman
| | - A Ramkumar
- Sultan Qaboos University, Al-Khod, Seeb, Oman
| | - S Bhat
- Sultan Qaboos University, Al-Khod, Seeb, Oman
| | - I Gupta
- Sultan Qaboos University, Al-Khod, Seeb, Oman
| | - S Muzumdar
- Sultan Qaboos University, Al-Khod, Seeb, Oman
| | - L Hakkim
- Sultan Qaboos University, Al-Khod, Seeb, Oman
| | - A Ouhtit
- Sultan Qaboos University, Al-Khod, Seeb, Oman
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25
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Dominguez de Maria P, Shanmuganathan S. Umpolung Catalysis in Benzoin-type and Stetter-type Reactions: From Enzymatic Performances to Bio-mimetic Organocatalytic Concepts. CURR ORG CHEM 2011. [DOI: 10.2174/138527211796150679] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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26
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Sekharan TR, Palanichamy S, Tamilvanan S, Shanmuganathan S, Thirupathi AT. Formulation and Evaluation of Hydroxypropyl Methylcellulose-based Controlled Release Matrix Tablets for Theophylline. Indian J Pharm Sci 2011; 73:451-6. [PMID: 22707833 PMCID: PMC3374565 DOI: 10.4103/0250-474x.95649] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2010] [Revised: 07/12/2011] [Accepted: 07/23/2011] [Indexed: 11/17/2022] Open
Abstract
The objectives of the study were to formulate hydroxypropyl methyl cellulose-based controlled release matrix tablets for theophylline with varying drug:polymer ratios (1:1 and 1:2) and differing tablet hardness (5, 6 and 7 kg/cm(2)), and to evaluate the tablet's physico-chemical properties such as hardness, uniformity of weight, friability, drug content and in vitro drug release. Initially, granules were made by wet granulation technique and evaluated for angle of repose, bulk density, tapped density, bulkiness, compressibility index and hausner ratio. The results indicate good flow property of the granules and thus, the evaluated tablet physical properties were within the acceptable limits. The FT-IR study for the F-6 formulation showed that there was no interaction between the drug and the polymer. In vitro release studies were performed using Disso-2000 (paddle method) in 900 ml of pH 7.4 at 50 rpm. The result indicated that at high drug:polymer ratio (1:2) and hardness value 7 kg/cm(2), prolonged drug release was observed than the low drug: polymer ratio (1:1) and hardness values (5 and 6 kg/cm(2)). The release kinetics was found to follow korsmeyers-peppas model and the mechanism of drug release was by non-fickian or anomalous diffusion. The F-6 formulation was chosen for stability studies. F-6 formulation was stable when it was kept at different temperatures for a period of 6 months.
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Affiliation(s)
- T. Raja Sekharan
- Department of Pharmaceutics, Sankaralingam Bhuvaneswari College of Pharmacy, Anaikuttam, Sivakasi-626 130, India,Address for correspondence E-mail:
| | - S. Palanichamy
- Department of Pharmaceutics, Sankaralingam Bhuvaneswari College of Pharmacy, Anaikuttam, Sivakasi-626 130, India
| | - S. Tamilvanan
- Department of Pharmaceutical Technology, International Medical University (IMU) SDN BHD, No. 126, Jalan 19/155B, Bukit Jalil, 57000 Kuala Lumpur, Malaysia
| | - S. Shanmuganathan
- Extremity Trauma Research and Regenerative Medicine, 3698, Chambers Pass, BHT 1, Bldg. 3611Ft. Sam Houston, Texas, USA
| | - A. Thanga Thirupathi
- Department of Pharmacology, Sankaralingam Bhuvaneswari College of Pharmacy, Anaikuttam, Sivakasi-626 130, India
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27
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Shanmuganathan S, Greiner L, Domínguez de María P. Silica-immobilized piperazine: A sustainable organocatalyst for aldol and Knoevenagel reactions. Tetrahedron Lett 2010. [DOI: 10.1016/j.tetlet.2010.10.080] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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28
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Lakshmi TSR, Shanmugasundaram N, Shanmuganathan S, Karthikeyan K, Meenakshi J, Babu M. Controlled release of 2, 3 desulfated heparin exerts its anti-inflammatory activity by effectively inhibiting E-selectin. J Biomed Mater Res A 2010; 95:118-28. [DOI: 10.1002/jbm.a.32791] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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29
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Shanmuganathan S, Tanveer B, Clark S. 410: Outcome of Lung Graft Volume Reduction for Oversized Donors during Pulmonary Transplantation. J Heart Lung Transplant 2010. [DOI: 10.1016/j.healun.2009.11.425] [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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30
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Abstract
The fluorescent nucleic acid binding dyes hexidium iodide (HI) and SYTO 13 were used in combination as a Gram stain for unfixed organisms in suspension. HI penetrated gram-positive but not gram-negative organisms, whereas SYTO 13 penetrated both. When the dyes were used together, gram-negative organisms were rendered green fluorescent by SYTO 13; conversely, gram-positive organisms were rendered red-orange fluorescent by HI, which simultaneously quenched SYTO 13 green fluorescence. The technique correctly predicted the Gram status of 45 strains of clinically relevant organisms, including several known to be gram variable. In addition, representative strains of gram-positive anaerobic organisms, normally decolorized during the traditional Gram stain procedure, were classified correctly by this method.
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Affiliation(s)
- D J Mason
- Infection and Immunity Laboratory, United Medical School, Guy's Hospital, London, United Kingdom
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31
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Ahmadi K, Wilson C, Tiwana H, Ebringer A, Shanmuganathan S, Binder A. Antibodies to Klebsiella pneumoniae nitrogenase reductase in patients with ankylosing spondylitis. Ann Rheum Dis 1998; 57:441. [PMID: 9797574 PMCID: PMC1752662 DOI: 10.1136/ard.57.7.441] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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32
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Shanmuganathan S, Waters JA, Karayiannis P, Thursz M, Thomas HC. Mapping of the cellular immune responses to woodchuck hepatitis core antigen epitopes in chronically infected woodchucks. J Med Virol 1997; 52:128-35. [PMID: 9179757 DOI: 10.1002/(sici)1096-9071(199706)52:2<128::aid-jmv2>3.0.co;2-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [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: 02/04/2023]
Abstract
T-cell responses to hepatitis B virus nucleocapsid antigens (HBcAg and HBeAg) play an important role in disease outcome in those infected with hepatitis B virus (HBV). The woodchuck is naturally infected in the wild with woodchuck hepatitis virus (WHV), which shows a high degree of genetic homology to HBV and produces a similar pattern of infection in its natural host. Twenty-three overlapping peptides were constructed to cover the entire WHV core region and used to identify immunodominant cellular epitopes in the nucleocapsid antigen using peripheral blood lymphocytes from 12 chronic WHV carrier and 4 uninfected control animals. A peripheral blood lymphocyte response was seen in all of the chronic WHV carrier animals to at least one peptide, and in 8 of the 12 chronic carrier animals a response was observed to 5 common peptides: peptide analogues of amino acids 16-30, 38-52, 50-69, 76-90 and 91-105. Peptide 91-105 produced maximal proliferation in 5 out of 12 infected animals. In addition, a difference in response was observed between wild and laboratory infected animals; the latter appeared to have a lower response to peptides than animals infected in the wild. This study provides evidence that the woodchuck has a population of peripheral blood cells which are sensitised to epitopes within the nucleocapsid protein and provides a basis on which to develop the use of the woodchuck as an immunological model of HBV infection for testing therapeutic means of enhancing this response.
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Affiliation(s)
- S Shanmuganathan
- Department of Medicine, Imperial College School of Medicine at St. Mary's, London, United Kingdom
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