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Anandan C, Jankovic J. Use of botulinum toxin in the management of dystonia in Parkinson's disease. Front Neurosci 2024; 18:1371601. [PMID: 38650620 PMCID: PMC11033361 DOI: 10.3389/fnins.2024.1371601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Accepted: 03/19/2024] [Indexed: 04/25/2024] Open
Abstract
Botulinum toxin is one of the most potent neurotoxins, but when injected into an overactive muscle, it can transiently alleviate an involuntary movement, such as dystonia. The primary aim of this article is to provide a comprehensive review of the various forms of dystonia observed in patients with Parkinson's disease who can benefit from a therapeutic trial of botulinum toxin. Although most of these indications are not supported by randomized controlled clinical trials and, therefore, not approved by the Food and Drug Administration, there are many open-label trials supporting a large body of empirical experience testifying to the benefits of botulinum toxin treatment in these conditions.
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Affiliation(s)
- Charenya Anandan
- Department of Neurology, Parkinson's Disease Center and Movement Disorders Clinic, Baylor College of Medicine, Houston, TX, United States
- Neurology Care Line, Michael E. DeBakey VA Medical Center, Houston, TX, United States
| | - Joseph Jankovic
- Department of Neurology, Parkinson's Disease Center and Movement Disorders Clinic, Baylor College of Medicine, Houston, TX, United States
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Anandan C, Jankovic J. Botulinum toxin treatment in parkinsonism. J Neurol Sci 2024; 456:122810. [PMID: 38056063 DOI: 10.1016/j.jns.2023.122810] [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: 06/05/2023] [Revised: 10/30/2023] [Accepted: 11/22/2023] [Indexed: 12/08/2023]
Abstract
Botulinum toxin (BoNT) was approved by the United States Food and Drug Administration (FDA) in 1989 for facial movement disorders and strabismus, but since that time its indications have been expanding beyond neurologic and ophthalmologic disorders. This article is a narrative review of the therapeutic use of BoNT in tremors, dystonia, sialorrhea, bladder and other autonomic symptoms, levodopa-induced dyskinesia and other problems occuring in the setting of parkinsonism. Though FDA approval is lacking for some of these indications, expert experiences have shown that BoNT is often beneficial in this group of patients.
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Affiliation(s)
- Charenya Anandan
- Parkinson's Disease Center and Movement Disorders Clinic, Department of Neurology, Baylor College of Medicine, Houston, TX, United States of America; Neurology Care Line, Michael E DeBakey VA Medical Center, Houston, TX, United States of America
| | - Joseph Jankovic
- Parkinson's Disease Center and Movement Disorders Clinic, Department of Neurology, Baylor College of Medicine, Houston, TX, United States of America.
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Abstract
Since its initial approval in 1989 by the US Food and Drug Administration for the treatment of blepharospasm and other facial spasms, botulinum toxin (BoNT) has evolved into a therapeutic modality for a variety of neurological and non-neurological disorders. With respect to neurologic movement disorders, BoNT has been reported to be effective for the treatment of dystonia, bruxism, tremors, tics, myoclonus, restless legs syndrome, tardive dyskinesia, and a variety of symptoms associated with Parkinson’s disease. More recently, research with BoNT has expanded beyond its use as a powerful muscle relaxant and a peripherally active drug to its potential central nervous system applications in the treatment of neurodegenerative disorders. Although BoNT is the most potent biologic toxin, when it is administered by knowledgeable and experienced clinicians, it is one of the safest therapeutic agents in clinical use. The primary aim of this article is to provide an update on recent advances in BoNT research with a focus on novel applications in the treatment of movement disorders. This comprehensive review of the literature provides a critical review of evidence-based clinical trials and highlights recent innovative pilot studies.
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Anandan C, Milone M, Liewluck T. Intramuscular interstitial amyloid deposition does not impact anoctaminopathy-5 phenotype. Muscle Nerve 2018; 59:133-137. [DOI: 10.1002/mus.26349] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2018] [Revised: 09/11/2018] [Accepted: 09/15/2018] [Indexed: 12/15/2022]
Affiliation(s)
- Charenya Anandan
- Department of Neurology; Mayo Clinic; 200 First Street SW, Rochester Minnesota 55905 USA
| | - Margherita Milone
- Department of Neurology; Mayo Clinic; 200 First Street SW, Rochester Minnesota 55905 USA
| | - Teerin Liewluck
- Department of Neurology; Mayo Clinic; 200 First Street SW, Rochester Minnesota 55905 USA
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Viswanathan S, Mohan L, Bera P, Shanthiswaroop S, Muniprakash M, Barshilia HC, Anandan C. Corrosion and wear resistance properties of multilayered diamond-like carbon nanocomposite coating. SURF INTERFACE ANAL 2018. [DOI: 10.1002/sia.6353] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- S. Viswanathan
- Surface Engineering Division; CSIR-National Aerospace Laboratories; Bengaluru 560017 India
| | - L. Mohan
- Surface Engineering Division; CSIR-National Aerospace Laboratories; Bengaluru 560017 India
| | - Parthasarathi Bera
- Surface Engineering Division; CSIR-National Aerospace Laboratories; Bengaluru 560017 India
| | - S. Shanthiswaroop
- Surface Engineering Division; CSIR-National Aerospace Laboratories; Bengaluru 560017 India
| | - M. Muniprakash
- Surface Engineering Division; CSIR-National Aerospace Laboratories; Bengaluru 560017 India
| | - Harish C. Barshilia
- Surface Engineering Division; CSIR-National Aerospace Laboratories; Bengaluru 560017 India
| | - C. Anandan
- Surface Engineering Division; CSIR-National Aerospace Laboratories; Bengaluru 560017 India
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Anandan C, Cipriani MA, Laughlin RS, Niu Z, Milone M. Rhabdomyolysis and fluctuating asymptomatic hyperCKemia associated with CACNA1S variant. Eur J Neurol 2017; 25:417-419. [PMID: 29193480 DOI: 10.1111/ene.13528] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [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: 08/25/2017] [Accepted: 11/24/2017] [Indexed: 12/25/2022]
Abstract
BACKGROUND AND PURPOSE CACNA1S encodes Cav 1.1, a voltage sensor for muscle excitation-contraction coupling, which activates the ryanodine receptor 1 (RYR1) leading to calcium release from the sarcoplasmic reticulum. CACNA1S mutations cause hypokalemic periodic paralysis, malignant hyperthermia and congenital myopathy. RYR1 mutations result in congenital myopathy, malignant hyperthermia and rhabdomyolysis. METHODS The aim was to describe a novel phenotype associated with a CACNA1S variant at a site previously linked to hypokalemic periodic paralysis. RESULTS The patient presented with fluctuating asymptomatic creatine kinase elevation after an episode of rhabdomyolysis but has no history of periodic paralysis. His muscle biopsy showed core-like structures occurring mainly in type 2 fibers. He carries a novel Cav 1.1 variant (p.Arg528Leu) affecting a highly conserved amino acid. Different mutations at the same location cause hypokalemic periodic paralysis. CONCLUSION This case underscores the similarity between the phenotypes caused by mutations in two functionally linked proteins, RYR1 and Cav 1.1.
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Affiliation(s)
- C Anandan
- Department of Neurology, Mayo Clinic, Rochester, MN, USA
| | - M A Cipriani
- Department of Family Medicine, Mayo Clinic, Rochester, MN, USA
| | - R S Laughlin
- Department of Neurology, Mayo Clinic, Rochester, MN, USA
| | - Z Niu
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, USA.,Department of Clinical Genomics, Mayo Clinic, Rochester, MN, USA
| | - M Milone
- Department of Neurology, Mayo Clinic, Rochester, MN, USA
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Anandan C, Milone M. An adult with a rare form of congenital fiber type disproportion. Muscle Nerve 2017; 57:E97-E99. [PMID: 28881016 DOI: 10.1002/mus.25954] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2017] [Revised: 08/25/2017] [Accepted: 09/02/2017] [Indexed: 12/25/2022]
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Anandan C, Khuder SA, Koffman BM. Prevalence of autonomic dysfunction in hospitalized patients with Guillain-Barré syndrome. Muscle Nerve 2017; 56:331-333. [PMID: 28039863 DOI: 10.1002/mus.25551] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/28/2016] [Indexed: 11/06/2022]
Abstract
INTRODUCTION There is a paucity of data regarding autonomic dysfunction (AD) in Guillain-Barré Syndrome (GBS). Concern exists regarding inpatient mortality risk in GBS. We sought to identify the prevalence of AD in GBS inpatients. METHODS We used the Health Cost and Utilization Project Nationwide Inpatient Sample (NIS). GBS hospitalizations were identified by International Classification of Diseases, Ninth Revision, Clinical Modification code-357.0. Non-GBS hospitalizations were matched to these cases 4:1 by age and gender. RESULTS We identified 2,587 GBS patients and a control population of 10,348 patients during 2010-2011. The most common manifestations of AD were: diarrhea/constipation (15.5%), hyponatremia (14.9%), syndrome of inappropriate antidiuretic hormone secretion (SIADH) (4.8%), bradycardia (4.7%), and urinary retention (3.9%). GBS patients had higher rates of reversible cardiomyopathy, syncope, tachycardia, and Horner syndrome (P < 0.0001). CONCLUSIONS AD most commonly manifests as diarrhea/constipation, SIADH/hyponatremia, and cardiac dysfunction. This report can help increase awareness of AD in GBS and aid in early identification, treatment, and mortality reduction. Muscle Nerve 56: 331-333, 2017.
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Affiliation(s)
- Charenya Anandan
- Department of Neurology University of Toledo College of Medicine, 3000 Arlington Avenue, Toledo, Ohio, 43614, USA
| | - Sadik A Khuder
- Department of Medicine, University of Toledo College of Medicine, Toledo, Ohio, USA
| | - Boyd M Koffman
- Department of Neurology University of Toledo College of Medicine, 3000 Arlington Avenue, Toledo, Ohio, 43614, USA
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Mohan L, Anandan C, Rajendran N. Drug release characteristics of quercetin-loaded TiO 2 nanotubes coated with chitosan. Int J Biol Macromol 2016; 93:1633-1638. [DOI: 10.1016/j.ijbiomac.2016.04.034] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2016] [Revised: 04/06/2016] [Accepted: 04/12/2016] [Indexed: 10/21/2022]
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Viswanathan S, Mohan L, John S, Bera P, Anandan C. Effect of surface finishing on the formation of nanostructure and corrosion behavior of Ni-Ti alloy. SURF INTERFACE ANAL 2016. [DOI: 10.1002/sia.6178] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- S. Viswanathan
- Surface Engineering Division; CSIR-National Aerospace Laboratories; Bangalore 560017 India
| | | | - Siju John
- Surface Engineering Division; CSIR-National Aerospace Laboratories; Bangalore 560017 India
| | - Parthasarathi Bera
- Surface Engineering Division; CSIR-National Aerospace Laboratories; Bangalore 560017 India
| | - C. Anandan
- Surface Engineering Division; CSIR-National Aerospace Laboratories; Bangalore 560017 India
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Sreedhar M, Neelakanta Reddy I, Bera P, Shyju TS, Anandan C. Studies of Cu-doped ZnS thin films prepared by sputtering technique. SURF INTERFACE ANAL 2016. [DOI: 10.1002/sia.6130] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- M. Sreedhar
- Centre for Nanoscience and Nanotechnology; Sathyabama University; Chennai 600119 India
| | - I. Neelakanta Reddy
- Centre for Nanoscience and Nanotechnology; Sathyabama University; Chennai 600119 India
| | - Parthasarathi Bera
- Surface Engineering Division; CSIR-National Aerospace Laboratories; Bangalore 560017 India
| | - T. S. Shyju
- Centre for Nanoscience and Nanotechnology; Sathyabama University; Chennai 600119 India
| | - C. Anandan
- Surface Engineering Division; CSIR-National Aerospace Laboratories; Bangalore 560017 India
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Viswanathan S, Mohan L, Bera P, Anandan C. Effect of oxygen plasma immersion ion implantation on the formation of nanostructures over Ni–Ti alloy. RSC Adv 2016. [DOI: 10.1039/c6ra11541a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Ni–Ti alloy has been implanted with oxygen ions by plasma immersion ion implantation. Ni–Ti–O nanotubes are formed by anodic oxidation of oxygen implanted Ni–Ti alloy.
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Affiliation(s)
- S. Viswanathan
- Surface Engineering Division
- CSIR-National Aerospace Laboratories
- Bangalore 560017
- India
| | - L. Mohan
- Surface Engineering Division
- CSIR-National Aerospace Laboratories
- Bangalore 560017
- India
| | - Parthasarathi Bera
- Surface Engineering Division
- CSIR-National Aerospace Laboratories
- Bangalore 560017
- India
| | - C. Anandan
- Surface Engineering Division
- CSIR-National Aerospace Laboratories
- Bangalore 560017
- India
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Jayanthi Rajan K, Mohan Rao M, Satyanarayana L, Manivel Raja M, Mohan Kumar K, Srikanth VVSS, Subramanian M, Anandan C, Manorama SV. Luminescence and high temperature ferromagnetism in YAlO nanophosphors: materials for efficient next generation LEDs and spintronic applications. RSC Adv 2016. [DOI: 10.1039/c6ra01425a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Yttrium-aluminium-oxide (YAlO) based nanophosphors for environment friendly and efficient white LEDs and spintronics devices.
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Affiliation(s)
- K. Jayanthi Rajan
- Nanomaterials Laboratory
- Inorganic and Physical Chemistry Division
- CSIR-Indian Institute of Chemical Technology
- Hyderabad 500007
- India
| | - M. Mohan Rao
- Nanomaterials Laboratory
- Inorganic and Physical Chemistry Division
- CSIR-Indian Institute of Chemical Technology
- Hyderabad 500007
- India
| | - L. Satyanarayana
- Nanomaterials Laboratory
- Inorganic and Physical Chemistry Division
- CSIR-Indian Institute of Chemical Technology
- Hyderabad 500007
- India
| | - M. Manivel Raja
- Defence Metallurgical Research Laboratory
- Hyderabad 500058
- India
| | - Kuntumalla Mohan Kumar
- School of Engineering Sciences and Technology
- University of Hyderabad
- Hyderabad 500046
- India
| | | | - Munisamy Subramanian
- Department of Frontier Materials
- Graduate School of Engineering
- Nagoya Institute of Technology
- Nagoya 4668555
- Japan
| | - C. Anandan
- Surface Engineering Division
- National Aerospace Laboratories
- Bangalore 560017
- India
| | - Sunkara V. Manorama
- Nanomaterials Laboratory
- Inorganic and Physical Chemistry Division
- CSIR-Indian Institute of Chemical Technology
- Hyderabad 500007
- India
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Mohan L, Anandan C, Rajendran N. Electrochemical behaviour and bioactivity of self-organized TiO2 nanotube arrays on Ti-6Al-4V in Hanks’ solution for biomedical applications. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2014.12.032] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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Abstract
3D images of nanotube (a) TNT and ta-C filled TNT samples at (b) 0.5 min, (c) 1 min, (d) 2 min, (e) 5 min and (f) 10 min.
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Affiliation(s)
- L. Mohan
- Surface Engineering Division
- CSIR-National Aerospace Laboratories
- Bangalore
- India
- Department of Chemistry
| | - S. Viswanathan
- Surface Engineering Division
- CSIR-National Aerospace Laboratories
- Bangalore
- India
| | - C. Anandan
- Surface Engineering Division
- CSIR-National Aerospace Laboratories
- Bangalore
- India
| | - N. Rajendran
- Department of Chemistry
- Anna University
- Chennai
- India
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Mohan L, Anandan C, Rajendran N. Effect of plasma nitriding on structure and biocompatibility of self-organised TiO2 nanotubes on Ti–6Al–7Nb. RSC Adv 2015. [DOI: 10.1039/c5ra05818j] [Citation(s) in RCA: 18] [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] Open
Abstract
TiO2 nanotubes formed by anodic oxidation of Ti–6Al–7Nb were nitrided in a nitrogen plasma.
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Affiliation(s)
- L. Mohan
- Surface Engineering Division
- CSIR-National Aerospace Laboratories
- Bangalore
- India
- Department of Chemistry
| | - C. Anandan
- Surface Engineering Division
- CSIR-National Aerospace Laboratories
- Bangalore
- India
| | - N. Rajendran
- Department of Chemistry
- Anna University
- Chennai
- India
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Mani SP, Anandan C, Rajendran N. Formation of a protective nitride layer by electrochemical nitridation on 316L SS bipolar plates for a proton exchange membrane fuel cell (PEMFC). RSC Adv 2015. [DOI: 10.1039/c5ra05412e] [Citation(s) in RCA: 18] [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] Open
Abstract
In the present study, an attempt has been made to increase the corrosion resistance of 316L stainless steel (SS) bipolar plates (Bp) through electrochemical nitridation using a nitrate bearing electrolyte solution of 0.1 M HNO3 and 0.5 M KNO3.
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Affiliation(s)
- S. Pugal Mani
- Department of Chemistry
- Anna University
- Chennai-25
- India
| | - C. Anandan
- Surface Engineering Division
- CSIR-National Aerospace Laboratories
- Bangalore
- India
| | - N. Rajendran
- Department of Chemistry
- Anna University
- Chennai-25
- India
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Sekaran G, Karthikeyan S, Boopathy R, Maharaja P, Gupta VK, Anandan C. Response surface modeling for optimization heterocatalytic Fenton oxidation of persistence organic pollution in high total dissolved solid containing wastewater. Environ Sci Pollut Res Int 2014; 21:1489-1502. [PMID: 23925658 DOI: 10.1007/s11356-013-2024-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2013] [Accepted: 07/18/2013] [Indexed: 06/02/2023]
Abstract
The rice-husk-based mesoporous activated carbon (MAC) used in this study was precarbonized and activated using phosphoric acid. N2 adsorption/desorption isotherm, X-ray powder diffraction, electron spin resonance, X-ray photoelectron spectroscopy and scanning electron microscopy, transmission electron microscopy, (29)Si-NMR spectroscopy, and diffuse reflectance spectroscopy were used to characterize the MAC. The tannery wastewater carrying high total dissolved solids (TDS) discharged from leather industry lacks biodegradability despite the presence of dissolved protein. This paper demonstrates the application of free electron-rich MAC as heterogeneous catalyst along with Fenton reagent for the oxidation of persistence organic compounds in high TDS wastewater. The heterogeneous Fenton oxidation of the pretreated wastewater at optimum pH (3.5), H2O2 (4 mmol/L), FeSO4[Symbol: see text]7H2O (0.2 mmol/L), and time (4 h) removed chemical oxygen demand, biochemical oxygen demand, total organic carbon and dissolved protein by 86, 91, 83, and 90%, respectively.
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Affiliation(s)
- G Sekaran
- Environmental Technology Division, Council of Scientific & Industrial Research (CSIR)-Central Leather Research Institute (CLRI), Adyar, Chennai, 600 020, Tamil Nadu, India,
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Nagiah N, Madhavi L, Anitha R, Anandan C, Srinivasan NT, Sivagnanam UT. Development and characterization of coaxially electrospun gelatin coated poly (3-hydroxybutyric acid) thin films as potential scaffolds for skin regeneration. Mater Sci Eng C Mater Biol Appl 2013; 33:4444-52. [PMID: 23910364 DOI: 10.1016/j.msec.2013.06.042] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2013] [Revised: 05/25/2013] [Accepted: 06/27/2013] [Indexed: 12/15/2022]
Abstract
The morphology of fibers synthesized through electrospinning has been found to mimic extracellular matrix. Coaxially electrospun fibers of gelatin (sheath) coated poly (3-hydroxybutyric acid) (PHB) (core) was developed using 2,2,2 trifluoroethanol(TFE) and 1,1,1,3,3,3 hexafluoro-2-propanol(HFIP) as solvents respectively. The coaxial structure and coating of gelatin with PHB fibers was confirmed through transmission electron microscopy (TEM), scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). Thermal stability of the coaxially electrospun fibers was analyzed using thermogravimetric analysis(TGA), differential scanning calorimetry(DSC) and differential thermogravimetric analysis(DTA). Complete evaporation of solvent and gelatin grafting over PHB fibers was confirmed through attenuated total reflection-Fourier transformed infrared spectroscopy (ATR-FTIR). The coaxially electrospun fibers exhibited competent tensile properties for skin regeneration with high surface area and porosity. In vitro degradation studies proved the stability of fibers and its potential applications in tissue engineering. The fibers supported the growth of human dermal fibroblasts and keratinocytes with normal morphology indicating its potential as a scaffold for skin regeneration.
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Affiliation(s)
- Naveen Nagiah
- Bioproducts Lab, Central Leather Research Institute, Adyar, Chennai, India
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20
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Mohan L, Anandan C, Grips VKW. Investigation of electrochemical behavior of nitrogen implanted Ti-15Mo-3Nb-3Al alloy in Hank's solution. J Mater Sci Mater Med 2013; 24:623-33. [PMID: 23242767 DOI: 10.1007/s10856-012-4835-8] [Citation(s) in RCA: 5] [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] [Subscribe] [Scholar Register] [Received: 03/31/2012] [Accepted: 12/03/2012] [Indexed: 05/21/2023]
Abstract
Titanium alloy Ti-15-3-3 (Beta-21S) was implanted with nitrogen ions by plasma immersion ion implantation at 700, 750 and 800 °C. Micro Raman and XPS results confirm the formation of nitrides after implantation. Corrosion current density (icorr) of the treated samples in simulated body fluid (Hank's solution) is higher than that of the substrate. Treated samples also exhibit lower charge transfer resistance and higher double layer capacitance as compared to that of substrate in electrochemical impedance spectroscopic studies. However, no corrosion related effects are observed after 28 days of immersion in SBF. EDS results show the presence of oxygen after corrosion studies. XPS spectra from the implanted samples show the presence of nitride and oxynitride on the surface and formation of oxide due to corrosion process.
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Affiliation(s)
- L Mohan
- Surface Engineering Division, CSIR-National Aerospace Laboratories, Bangalore, Karnataka, India
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21
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Karthikeyan S, Anandan C, Subramanian J, Sekaran G. Characterization of iron impregnated polyacrylamide catalyst and its application to the treatment of municipal wastewater. RSC Adv 2013. [DOI: 10.1039/c3ra41733f] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Highet G, Murray SA, Campbell C, Kendall M, Rainey P, Neal R, Rose P, Anandan C, Amoakwa E, Weller D. Resolving tensions: optimising the role of primary care in lung cancer follow-up care. BMJ Support Palliat Care 2011. [DOI: 10.1136/bmjspcare-2011-000020.8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Abstract
Asthma prevalence has increased very considerably in recent decades such that it is now one of the commonest chronic disorders in the world. Recent evidence from epidemiological studies, however, suggests that the prevalence of asthma may now be declining in many parts of the world, which, if true is important for health service planning and also because this offers the possibility of generating and testing new aetiological hypotheses. Our objective was to determine whether the prevalence of asthma is declining worldwide. We undertook a systematic search of EMBASE, Medline, Web of Science and Google Scholar, for high quality reports of cohort studies, repeat cross-sectional studies and analyses of routine healthcare datasets to examine international trends in asthma prevalence in children and adults for the period 1990-2008. There were 48 full reports of studies that satisfied our inclusion criteria. The large volume of data identified clearly indicate that there are, at present, no overall signs of a declining trend in asthma prevalence; on the contrary, asthma prevalence is in many parts of the world still increasing. The reductions in emergency healthcare utilization being reported in some economically developed countries most probably reflect improvements in quality of care. There remain major gaps in the literature on asthma trends in relation to Africa and parts of Asia. There is no overall global downward trend in the prevalence of asthma. Healthcare planners will for the foreseeable future, therefore, need to continue with high levels of anticipated expenditure in relation to provision of asthma care.
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Affiliation(s)
- C Anandan
- Centre for Population Health Sciences, University of Edinburgh, UK
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Anandan C, Gupta R, Simpson CR, Fischbacher C, Sheikh A. Epidemiology and disease burden from allergic disease in Scotland: analyses of national databases. J R Soc Med 2009; 102:431-42. [PMID: 19797601 DOI: 10.1258/jrsm.2009.090027] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND There are ongoing concerns about the quality of care provided to patients with allergic disorders in Scotland, but there are relatively few reliable data on the overall disease burden. We sought to: (1) describe the incidence, prevalence and outcome of allergic disorders; (2) estimate healthcare burden and costs; and (3) investigate ethnic variations in the epidemiology and outcomes from allergic disorders in Scotland. METHODS DATA SOURCES national surveys; primary care data; prescribing and medication data; hospital admissions data and mortality data. RESULTS Allergic disorders are extremely common in Scotland, affecting about one in three of the population at some time in their lives. Incidence was highest for eczema (10.2 per 1000 registered patients). Over 4% of all GP consultations and 1.5% of hospital admissions were for allergic disorders. There were 100 asthma deaths in 2005 (20 per million people). Direct healthcare costs for allergic disorders were an estimated pound130 million per year, the majority of these being incurred in primary care and related to asthma. CONCLUSIONS Allergic disorders are common in Scotland and given the very high proportion of children now affected, the high disease burden associated with these conditions is likely to persist for many decades.
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Affiliation(s)
- C Anandan
- Allergy & Respiratory Research Group, Centre for Population Health Sciences, University of Edinburgh, Edinburgh EH8 9DX, UK
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Abstract
BACKGROUND There is conflicting evidence on the use of omega 3 and omega 6 supplementation for the prevention of allergic diseases. We conducted a systematic review evaluating the effectiveness of omega 3 and 6 oils for the primary prevention of sensitization and development of allergic disorders. METHODS We searched The Cochrane Central Register of Controlled Trials, MEDLINE, EMBASE, LILACS, PsycInfo, AMED, ISI Web of Science and Google Scholar for double-blind randomized controlled trials. Two authors independently assessed articles for inclusion. Meta-analyses were undertaken using fixed effects modelling, or random effects modelling in the event of detecting significant heterogeneity. RESULTS Of the 3129 articles identified, 10 reports (representing six unique studies) satisfied the inclusion criteria. Four studies compared omega 3 supplements with placebo and two studies compared omega 6 supplements with placebo. There was no clear evidence of benefit in relation to reduced risk of allergic sensitization or a favourable immunological profile. Meta-analyses failed to identify any consistent or clear benefits associated with use of omega 3 [atopic eczema: RR = 1.10 (95% CI 0.78-1.54); asthma: RR = 0.81 (95% CI 0.53-1.25); allergic rhinitis: RR = 0.80 (95% CI 0.34-1.89) or food allergy RR = 0.51 (95% CI 0.10-2.55)] or omega 6 oils [atopic eczema: RR = 0.80 (95% CI 0.56-1.16)] for the prevention of clinical disease. CONCLUSIONS Contrary to the evidence from basic science and epidemiological studies, our systematic review and meta-analysis suggests that supplementation with omega 3 and omega 6 oils is probably unlikely to play an important role as a strategy for the primary prevention of sensitization or allergic disease.
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Affiliation(s)
- C Anandan
- Allergy & Respiratory Research Group, Centre for Population Health Sciences, University of Edinburgh, Edinburgh, UK
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Simpson CR, Anandan C, Fischbacher C, Lefevre K, Sheikh A. Will Systematized Nomenclature of Medicine-Clinical Terms improve our understanding of the disease burden posed by allergic disorders? Clin Exp Allergy 2007; 37:1586-93. [PMID: 17883425 DOI: 10.1111/j.1365-2222.2007.02830.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Analysis of data collected through the use of high-quality computerized systems is vital if we are to understand the health burden from allergic disease. Coding systems currently used, such as the World Health Organization's International Classification of Diseases and the Read system, have however been criticized as being unduly restrictive and hence inadequate for the detailed coding of allergic problems. Greater granularity of coding can be achieved by using the Systematized Nomenclature of Medicine-Clinical Terms (SNOMED-CT) system, which will be adopted by several countries including the United States and United Kingdom. Before the introduction of SNOMED-CT, it is important that several issues are resolved, including ensuring that adequate mapping occurs from existing systems, that the SNOMED-CT is trialled before general implementation, and that training is provided for users new to coding as part of their clinical practice. Of particular importance is that the allergy fraternity bring to light any gaps in allergy coding through the creation of a working group to advise the newly formed International Healthcare Terminology Standards Development Organisation. There is also a role for allergy experts, working in conjunction with government agencies and professional bodies, to determine a recommended set of codes, which will obviate some of the inevitable challenges raised by a very fluid coding structure for those wishing to undertake secondary analysis of health care datasets.
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Affiliation(s)
- C R Simpson
- Department of General Practice and Primary Care, Primary Care Clinical Informatics Unit, The University of Aberdeen, Scotland, UK
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Anandan C, Simpson CR, Fischbacher C, Sheikh A. Exploiting the potential of routine data to better understand the disease burden posed by allergic disorders. Clin Exp Allergy 2007; 36:866-71. [PMID: 16839400 DOI: 10.1111/j.1365-2222.2006.02520.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The Department of Health and Scottish Executive are currently undertaking independent reviews of allergy services in England (and Wales) and Scotland. Each review will assess the disease burden posed by allergic problems, involving secondary analyses of routine National Health Service (NHS) datasets. Major suggestions for re-structuring and/or re-focusing the NHS efforts to better deal with allergic disease are anticipated. The UK has some of the best datasets of routine health data in the world, but despite their strengths, they have important limitations. These include gaps in data collection, particularly in relation to monitoring of Accident & Emergency and out-patient consultations, and in-patient prescribing, thereby resulting in considerable under-estimates of hospital workload. The current gaps in service monitoring are likely to under-estimate the burden and workload associated with allergic problems, particularly in secondary care. One major limitation of existing data sources is the general inability to link individual patient level data between different datasets. By unlocking this potential there are very considerable potential gains to be made. Data linkage techniques currently being developed in the UK offer exciting new possibilities of looking across the primary-, secondary- and tertiary-care interfaces and also assessing short-and long-term social and educational outcomes in relation to allergic disorders. The current reviews of allergy services being undertaken need to be cognisant of these inherent limitations of existing data sources and would do well to recommend strategic initiatives that could enhance the availability, accessibility and quality of these datasets. Ideally, this should include investment in central data repositories staffed by teams with the necessary technical and statistical expertise, which would also take responsibility for progressing data linkage capabilities.
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Affiliation(s)
- C Anandan
- Division of Community Health Sciences: General Practice Section, University of Edinburgh, Edinburgh, UK.
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Anandan C, Basu BJ, Rajam K. Investigations of the effect of viscosity of resin on the diffusion of pyrene in silicone polymer coatings using steady state fluorescence technique. Eur Polym J 2004. [DOI: 10.1016/j.eurpolymj.2003.10.002] [Citation(s) in RCA: 11] [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: 11/25/2022]
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