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Guttenberg M, Vose A, Birukova A, Lewars K, Cumming R, Albright M, Mark J, Salazar C, Swaminathan S, Yu Z, Sokolenko Y, Bunyan E, Yaeger M, Fessler M, Que L, Gowdy K, Misharin A, Tighe R. Tissue-resident alveolar macrophages reduce O 3-induced inflammation via MerTK mediated efferocytosis. bioRxiv 2023:2023.11.06.565865. [PMID: 37986982 PMCID: PMC10659406 DOI: 10.1101/2023.11.06.565865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2023]
Abstract
Lung inflammation, caused by acute exposure to ozone (O3) - one of the six criteria air pollutants - is a significant source of morbidity in susceptible individuals. Alveolar macrophages (AMØs) are the most abundant immune cells in the normal lung and their number increases following O3 exposure. However, the role of AMØs in promoting or limiting O3-induced lung inflammation has not been clearly defined. Here, we used a mouse model of acute O3 exposure, lineage tracing, genetic knockouts, and data from O3-exposed human volunteers to define the role and ontogeny of AMØs during acute O3 exposure. Lineage tracing experiments showed that 12, 24, and 72 h after exposure to O3 (2 ppm) for 3h all AMØs were tissue-resident origin. Similarly, in humans exposed to FA and O3 (200 ppb) for 135 minutes, we did not observe ~21h post-exposure an increase in monocyte-derived AMØs by flow cytometry. Highlighting a role for tissue-resident AMØs, we demonstrate that depletion of tissue-resident AMØs with clodronate-loaded liposomes led to persistence of neutrophils in the alveolar space after O3 exposure, suggesting that impaired neutrophil clearance (i.e., efferocytosis) leads to prolonged lung inflammation. Moreover, depletion of tissue-resident AMØ demonstrated reduced clearance of intratracheally instilled apoptotic Jurkat cells, consistent with reduced efferocytosis. Genetic ablation of MerTK - a key receptor involved in efferocytosis - also resulted in impaired clearance of apoptotic neutrophils followed O3 exposure. Overall, these findings underscore the pivotal role of tissue-resident AMØs in resolving O3-induced inflammation via MerTK-mediated efferocytosis.
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Affiliation(s)
- M.A. Guttenberg
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, Duke University, Durham, NC
| | - A.T. Vose
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, Duke University, Durham, NC
| | - A. Birukova
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, Duke University, Durham, NC
| | - K. Lewars
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, Duke University, Durham, NC
| | - R.I. Cumming
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, Duke University, Durham, NC
| | - M.C. Albright
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, Duke University, Durham, NC
| | - J.I. Mark
- Department of Health Sciences, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - C.J. Salazar
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, Duke University, Durham, NC
| | - S. Swaminathan
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Northwestern University, Chicago, IL
| | - Z. Yu
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Northwestern University, Chicago, IL
| | - Yu.V. Sokolenko
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Northwestern University, Chicago, IL
| | - E. Bunyan
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Northwestern University, Chicago, IL
| | - M.J. Yaeger
- Division of Pulmonary, Critical Care and Sleep Medicine, The Ohio State University, Columbus, OH
| | - M.B. Fessler
- Immunity, Inflammation and Disease Laboratory, National Institute of Environmental Health Sciences, NIH, Research Triangle Park, NC
| | - L.G. Que
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, Duke University, Durham, NC
| | - K.M. Gowdy
- Division of Pulmonary, Critical Care and Sleep Medicine, The Ohio State University, Columbus, OH
| | - A.V. Misharin
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Northwestern University, Chicago, IL
| | - R.M. Tighe
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, Duke University, Durham, NC
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2
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Roncaglia C, Swaminathan S, Farris R, El Koraychy EY. Highlights from Faraday Discussion on Nanoalloys: recent developments and future perspectives, London, UK. Chem Commun (Camb) 2023; 59:3331-3338. [PMID: 36861398 DOI: 10.1039/d3cc90068a] [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: 03/03/2023]
Abstract
In this article, we present a summary of the Faraday Discussion that took place on September 21-23, 2022 in London, UK. The primary goal of this event was to promote and discuss the recent developments in the field of nanoalloys. Here we briefly outline each scientific session as well as other conference events.
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Affiliation(s)
- Cesare Roncaglia
- Physics Department, University of Genoa, Via Dodecaneso 33, 16146 Genoa, Italy.
| | - Swathi Swaminathan
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | - Riccardo Farris
- Departament de Ciència de Materials i Química Física & Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona, 08028 Barcelona, Spain
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Swaminathan S, Bera JK, Chandra M. Simultaneous Harvesting of Multiple Hot Holes via Visible-Light Excitation of Plasmonic Gold Nanospheres for Selective Oxidative Bond Scission of Olefins to Carbonyls. Angew Chem Int Ed Engl 2023; 62:e202215933. [PMID: 36524790 DOI: 10.1002/anie.202215933] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2022] [Revised: 12/10/2022] [Accepted: 12/15/2022] [Indexed: 12/23/2022]
Abstract
Using visible photoexcitation of gold nanospheres we successfully demonstrate the simultaneous harvesting of plasmon-induced multiple hot holes in the complete oxidative scission of the C=C bond in styrene at room temperature to selectively form benzaldehyde and formaldehyde, which is a reaction that requires activation of multiple substrates. Our results reveal that, while extraction of hot holes becomes efficient for interband excitation, harvesting of multiple hot holes from the excited Au nanospheres becomes prevalent only beyond a threshold light intensity. We show that the alkene oxidation proceeded via a sequence of two consecutive elementary steps; namely, a binding step and a cyclic oxometallate transition state as the rate-determining step. This demonstration of plasmon-excitation-mediated harvesting of multiple hot holes without the use of an extra hole transport media opens exciting possibilities, notably for difficult catalytic transformations involving multielectron oxidation processes.
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Affiliation(s)
- Swathi Swaminathan
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, 208016, Uttar Pradesh, India
| | - Jitendra K Bera
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, 208016, Uttar Pradesh, India
| | - Manabendra Chandra
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, 208016, Uttar Pradesh, India
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4
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Aikens C, Alloyeau D, Amara H, Amendola V, Amiens C, Andreazza P, Baletto F, Barcikowski S, Bowker M, Calvo F, Chen F, Cottancin E, Ernst WE, Farris R, Ferrando R, Förster GD, Fortunelli A, Front A, Grandjean D, Guesmi H, Hutchings GJ, Janssens E, Jose Yacaman M, Kuttner C, Marceau É, Mariscal MM, Mathiesen JK, McGrady J, Nguyen T, Ntola P, Owen CJ, Paris C, Polak M, Svensson R, Swaminathan S, Treguer-Delapierre M, Quinson J, Zhang Y. Nanoalloy structures and catalysis part 2: general discussion. Faraday Discuss 2023; 242:212-230. [PMID: 36546553 DOI: 10.1039/d2fd90086f] [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: 12/24/2022]
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Aikens CM, Amara H, Amendola V, Baletto F, Barcikowski S, Barrabés N, Caps V, Chen F, Cheng D, Chinnabathini VC, Cottancin E, Daniel IT, De Knijf K, Fortunelli A, Grandjean D, Hutchings GJ, Janssens E, Jones RM, Kuttner C, Large AI, Marceau É, Mariscal MM, Ntola P, Quinson J, Shozi M, Swaminathan S, Treguer-Delapierre M, Wang L, Weissker HC, Jose Yacaman M, Zhang Y. Nanoalloy catalysis and magnetic and optical properties: general discussion. Faraday Discuss 2023; 242:522-541. [PMID: 36562328 DOI: 10.1039/d2fd90088b] [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: 12/24/2022]
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6
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Alloyeau D, Amendola V, Amiens C, Andreazza P, Bakker JM, Baletto F, Barcikowski S, Barrabés N, Bowker M, Chen F, Cottancin E, Ernst WE, Ferrando R, Förster GD, Fortunelli A, Grandjean D, Guesmi H, Hutchings GJ, Janssens E, Jose Yacaman M, Kuttner C, Macheli L, Marceau É, Mariscal MM, Mathiesen JK, McGrady J, Mottet C, Nelli D, Ntola P, Owen CJ, Polak M, Quinson J, Roncaglia C, Rubinovich L, Schäfer R, Settem M, Shield J, Shozi M, Swaminathan S, Vajda Š, Weissker HC. Nanoalloy structures and catalysis part 1: general discussion. Faraday Discuss 2023; 242:106-128. [PMID: 36562474 DOI: 10.1039/d2fd90085h] [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: 12/24/2022]
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7
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Swaminathan S, Bera JK, Chandra M. Simultaneous Harvesting of Multiple Hot‐Holes via Visible Light Excitation of Plasmonic Gold Nanospheres for a Selective Oxidative Bond Scission of Olefins to Carbonyls. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202215933] [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: 12/23/2022]
Affiliation(s)
- Swathi Swaminathan
- IIT Kanpur: Indian Institute of Technology Kanpur Chemistry Sl-213Academic AreaIIT Kanpur 208016 Kanpur INDIA
| | - Jitendra K Bera
- IIT Kanpur: Indian Institute of Technology Kanpur Chemistry Core Lab -107BAcademic Area 208016 Kanpur INDIA
| | - Manabendra Chandra
- Indian Institute of Technology Kanpur Chemistry Sl-213Academic AreaIIT Kanpur 208016 KANPUR INDIA
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8
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Murdolo L, Swaminathan S, Szeto C, Smith C, Gras S. Structural characterization of SARS-CoV-2 spike derived peptides presented by the Human Leukocyte Antigen A*29:02. Acta Cryst Sect A 2022. [DOI: 10.1107/s2053273322094037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/19/2023]
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9
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Kalaichelvi V, Vimala Devi P, Meenakshi P, Swaminathan S, Suganya S. Design of digital image encryption based on elliptic curve cryptography (ECC) algorithm and Radix-64 conversion. IFS 2022. [DOI: 10.3233/jifs-220767] [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: 11/15/2022]
Abstract
The billions of bits of information are transferred each second through the internet every day. The information may be text, image, audio or video etc, accordingly, we need some protection mechanism while sharing confidential data. Generally, RSA algorithm is used for encrypting the Secret images. However, the security provided by Elliptic Curve Cryptography (ECC) is higher with lower sized key than the RSA algorithm. So, this article proposes an extended Elliptic Curve encryption approach for encrypting the secret images. In this system, the secret image is partitioned into three color image planes such as Red, Green and Blue. By applying Radix-64 encoding and Mapping table, these planes are converted into elliptic curve points and then these points are encrypted using ECC algorithm. Again, these points are applied to the Radix-64 decoding and the mapping table to get ciphered-image. At last, the key parameters such as a, b, p and Generator point (G) are embedded in the last four pixel positions of the ciphered-image. In order to get the original secret image, the recipient must extract these key parameters from the encrypted image and then apply the remaining processes to the encrypted image in the opposite order. Experimental results tested using MATLAB R2021b and it shows that the NPCR and UACI values are 99.54% and 28.73 % and better quality feature is attained since the entropy value is almost closer to eight. So, the proposed image encryption has robust capacity to fight against the differential attack.
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Affiliation(s)
- V. Kalaichelvi
- Department of CSE, SASTRA Deemed To Be University, Kumbakonam, Tamilnadu, India
| | - P. Vimala Devi
- Department of CSE, SASTRA Deemed To Be University, Kumbakonam, Tamilnadu, India
| | - P. Meenakshi
- Department of CSE, SASTRA Deemed To Be University, Kumbakonam, Tamilnadu, India
| | - S. Swaminathan
- Department of ECE, SASTRA Deemed To Be University, Kumbakonam, Tamilnadu, India
| | - S. Suganya
- Department of IT, AVC College of Engineering, Mayiladuthurai, Tamilnadu, India
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10
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Shivakumar SVBY, Padmapriyadarsini C, Chavan A, Paradkar M, Shrinivasa BM, Gupte A, Dhanasekaran K, Thomas B, Suryavanshi N, Dolla CK, Selvaraju S, Kinikar A, Gaikwad S, Kohli R, Sivaramakrishnan GN, Pradhan N, Hanna LE, Kulkarni V, DeLuca A, Cox SR, Murali L, Thiruvengadam K, Raskar S, Ramachandran G, Golub JE, Gupte N, Mave V, Swaminathan S, Gupta A, Bollinger RC. Concomitant pulmonary disease is common among patients with extrapulmonary TB. Int J Tuberc Lung Dis 2022; 26:341-347. [PMID: 35351239 PMCID: PMC8982647 DOI: 10.5588/ijtld.21.0501] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND : Microbiologic screening of extrapulmonary TB (EPTB) patients could inform recommendations for aerosol precautions and close contact prophylaxis. However, this is currently not routinely recommended in India. Therefore, we estimated the proportion of Indian patients with EPTB with microbiologic evidence of pulmonary TB (PTB). METHODS : We characterized baseline clinical, radiological and sputum microbiologic data of 885 adult and pediatric TB patients in Chennai and Pune, India, between March 2014 and November 2018. RESULTS : Of 277 patients with EPTB, enhanced screening led to the identification of 124 (45%) with concomitant PTB, including 53 (19%) who reported a cough >2 weeks; 158 (63%) had an abnormal CXR and 51 (19%) had a positive sputum for TB. Of 70 participants with a normal CXR and without any cough, 14 (20%) had a positive sputum for TB. Overall, the incremental yield of enhanced screening of patients with EPTB to identify concomitant PTB disease was 14% (95% CI 12–16). CONCLUSIONS : A high proportion of patients classified as EPTB in India have concomitant PTB. Our results support the need for improved symptom and CXR screening, and recommends routine sputum TB microbiology screening of all Indian patients with EPTB.
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Affiliation(s)
| | - C Padmapriyadarsini
- Indian Council of Medical Research-National Institute for Research in Tuberculosis, Chennai, India
| | - A Chavan
- Johns Hopkins India, Pune, India, Byramjee Jeejeebhoy Government Medical College-Johns Hopkins University Clinical Research Site, Pune, India
| | - M Paradkar
- Johns Hopkins India, Pune, India, Byramjee Jeejeebhoy Government Medical College-Johns Hopkins University Clinical Research Site, Pune, India
| | - B M Shrinivasa
- Indian Council of Medical Research-National Institute for Research in Tuberculosis, Chennai, India
| | - A Gupte
- Johns Hopkins School of Medicine, Baltimore, MD, USA
| | - K Dhanasekaran
- Indian Council of Medical Research-National Institute for Research in Tuberculosis, Chennai, India
| | - B Thomas
- Indian Council of Medical Research-National Institute for Research in Tuberculosis, Chennai, India
| | - N Suryavanshi
- Johns Hopkins India, Pune, India, Byramjee Jeejeebhoy Government Medical College-Johns Hopkins University Clinical Research Site, Pune, India, Johns Hopkins School of Medicine, Baltimore, MD, USA
| | - C K Dolla
- Indian Council of Medical Research-National Institute for Research in Tuberculosis, Chennai, India
| | - S Selvaraju
- Indian Council of Medical Research-National Institute for Research in Tuberculosis, Chennai, India
| | - A Kinikar
- Byramjee Jeejeebhoy Government Medical College, Pune, India
| | - S Gaikwad
- Byramjee Jeejeebhoy Government Medical College, Pune, India
| | - R Kohli
- Johns Hopkins India, Pune, India, Byramjee Jeejeebhoy Government Medical College-Johns Hopkins University Clinical Research Site, Pune, India
| | - G N Sivaramakrishnan
- Indian Council of Medical Research-National Institute for Research in Tuberculosis, Chennai, India
| | - N Pradhan
- Johns Hopkins India, Pune, India, Byramjee Jeejeebhoy Government Medical College-Johns Hopkins University Clinical Research Site, Pune, India
| | - L E Hanna
- Indian Council of Medical Research-National Institute for Research in Tuberculosis, Chennai, India
| | - V Kulkarni
- Johns Hopkins India, Pune, India, Byramjee Jeejeebhoy Government Medical College-Johns Hopkins University Clinical Research Site, Pune, India
| | - A DeLuca
- Johns Hopkins School of Medicine, Baltimore, MD, USA
| | - S R Cox
- Johns Hopkins School of Medicine, Baltimore, MD, USA
| | - L Murali
- District Tuberculosis Office, Thiruvallur, India
| | - K Thiruvengadam
- Indian Council of Medical Research-National Institute for Research in Tuberculosis, Chennai, India
| | - S Raskar
- Johns Hopkins India, Pune, India, Byramjee Jeejeebhoy Government Medical College-Johns Hopkins University Clinical Research Site, Pune, India
| | - G Ramachandran
- Indian Council of Medical Research-National Institute for Research in Tuberculosis, Chennai, India
| | - J E Golub
- Johns Hopkins School of Medicine, Baltimore, MD, USA, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - N Gupte
- Johns Hopkins India, Pune, India, Byramjee Jeejeebhoy Government Medical College-Johns Hopkins University Clinical Research Site, Pune, India, Johns Hopkins School of Medicine, Baltimore, MD, USA
| | - V Mave
- Johns Hopkins India, Pune, India, Byramjee Jeejeebhoy Government Medical College-Johns Hopkins University Clinical Research Site, Pune, India, Johns Hopkins School of Medicine, Baltimore, MD, USA
| | | | - A Gupta
- Johns Hopkins School of Medicine, Baltimore, MD, USA, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - R C Bollinger
- Johns Hopkins School of Medicine, Baltimore, MD, USA, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
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11
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Zhang C, Inamdar SM, Swaminathan S, Marenda DR, Saunders AJ. Association of the Protein-Quality-Control Protein Ubiquilin-1 With Alzheimer’s Disease Both in vitro and in vivo. Front Neurosci 2022; 16:821059. [PMID: 35401099 PMCID: PMC8992708 DOI: 10.3389/fnins.2022.821059] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [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: 11/23/2021] [Accepted: 02/24/2022] [Indexed: 11/13/2022] Open
Abstract
Alzheimer’s disease (AD) belongs to a class of diseases characterized by progressive accumulation and aggregation of pathogenic proteins, particularly Aβ proteins. Genetic analysis has identified UBQLN1 as an AD candidate gene. Ubiquilin-1 levels reduce with AD progression, suggesting a potential loss-of-function mechanism. The ubiquilin-1 protein is involved in protein quality control (PQC), which plays essential roles in cellular growth and normal cell function. Ubiquilin-1 regulates γ-secretase by increasing endoproteolysis of PS1, a key γ-secretase component. Presently, the effects of ubiquilin-1 on cellular physiology as well as Aβ-related events require further investigation. Here, we investigated the effects of ubiquilin-1 on cellular growth and viability in association with APP (amyloid-β protein precursor), APP processing-related β-secretase (BACE1, BACE) and γ-secretase using cell and animal-based models. We showed that loss-of-function in Drosophila ubqn suppresses human APP and human BACE phenotypes in wing veins and altered cell number and tissue compartment size in the wing. Additionally, we performed cell-based studies and showed that silencing UBQLN1 reduced cell viability and increased caspase-3 activity. Overexpression of UBQLN1 significantly reduced Aβ levels. Furthermore, pharmacological inhibition of γ-secretase increased ubiquilin-1 protein levels, suggesting a mechanism that regulates ubiquilin-1 levels which may associate with reduced Aβ reduction by inhibiting γ-secretase. Collectively, our results support not only a loss-of-function mechanism of ubiquilin-1 in association with AD, but also support the significance of targeting ubiquilin-1-mediated PQC as a potential therapeutic strategy for AD.
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Affiliation(s)
- Can Zhang
- Department of Biology, Drexel University, Philadelphia, PA, United States
| | | | - Swathi Swaminathan
- Department of Biology, Drexel University, Philadelphia, PA, United States
| | - Daniel R. Marenda
- Department of Biology, Drexel University, Philadelphia, PA, United States
- Division of Biological Infrastructure, National Science Foundation, Alexandria, VA, United States
| | - Aleister J. Saunders
- Department of Biology, Drexel University, Philadelphia, PA, United States
- *Correspondence: Aleister J. Saunders,
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Muthucumarana K, Howson P, Burrows S, Swaminathan S, Irish A. The effect of radiological imaging on treatment delay and hospitalisation in patients with peritoneal dialysis-related peritonitis: A secondary analysis of the PROMPT study. Perit Dial Int 2021; 42:154-161. [PMID: 34931574 DOI: 10.1177/08968608211065871] [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] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND In peritoneal dialysis-related peritonitis (peritonitis), delayed antibiotic therapy is associated with adverse outcomes. Identifying barriers to timely treatment may improve outcomes. AIM To determine the impact of radiological investigations on treatment delay and predictors of hospitalisation and length of stay (LOS). METHODS Retrospective review of patients with presumed peritonitis in Western Australia. RESULTS In 153 episodes of peritonitis, 79 (51.6%) resulted in admission with a median LOS of 3 days (Q1, Q3: 1, 6). In a multivariable model, significant predictors of admission were abnormal exit-site (odds ration (OR) 5.7; 95% confidence interval (CI): 1.4, 23.6; p = 0.02), failure to detect a cloudy bag (OR 11.9; 95%CI: 3.2, 44.7; p < 0.001), female sex (OR 3.3; 95% CI: 1.4, 9.7; p = 0.027), radiological imaging within 24 h (OR 8.8; 95% CI: 2.2, 34.8; p = 0.002) and contact with ambulant care facility (OR 0.32, 95% CI: 0.11, 0.98; p = 0.04). Imaging within 24 h of presentation occurred in 41 (27%) episodes of peritonitis, mostly plain X-rays (91%), of which 83% were clinically irrelevant. Imaging performed within 24 h of presentation increased the median time to antibiotic treatment (2.9 h (Q1, Q3: 1.6, 6.4) vs 2.0 h (Q1, Q3: 1, 3.8; p = 0.046)). Imaging performed prior to administering antibiotics significantly increased the median time to treatment (4.7 h (Q1, Q3: 2.9, 25) vs 1.5 h (Q1, Q3: 0.75, 2.5; p < 0.001)) in those where imaging followed antibiotic treatment. CONCLUSIONS Half of all presentations with peritonitis result in hospital admission. Radiological imaging was associated with an increased risk of hospitalisation, potentially contributes to treatment delay, and was mostly clinically unnecessary. When required, imaging should follow antibiotic therapy.
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Affiliation(s)
- K Muthucumarana
- Department of Nephrology, Royal Perth Hospital, Perth, Western Australia, Australia.,School of Medicine, University of Western Australia, Perth, Western Australia, Australia
| | - P Howson
- Department of Nephrology, Royal Perth Hospital, Perth, Western Australia, Australia
| | - S Burrows
- School of Medicine, University of Western Australia, Perth, Western Australia, Australia.,Royal Perth Hospital Research Foundation, Perth, Western Australia, Australia
| | - S Swaminathan
- Department of Nephrology, Fiona Stanley Hospital, Perth, Western Australia, Australia
| | - A Irish
- School of Medicine, University of Western Australia, Perth, Western Australia, Australia.,Department of Nephrology, Fiona Stanley Hospital, Perth, Western Australia, Australia
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Basehore SE, Bohlman S, Weber C, Swaminathan S, Zhang Y, Jang C, Arany Z, Clyne AM. Laminar Flow on Endothelial Cells Suppresses eNOS O-GlcNAcylation to Promote eNOS Activity. Circ Res 2021; 129:1054-1066. [PMID: 34605247 DOI: 10.1161/circresaha.121.318982] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
[Figure: see text].
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Affiliation(s)
- Sarah E Basehore
- School of Biomedical Engineering, Science, and Health Systems, Drexel University, Philadelphia, PA (S.E.B., S.S.).,Fischell Department of Biomedical Engineering, College of Engineering, University of Maryland, College Park (S.B., C.W., A.M.C.)
| | - Samantha Bohlman
- Fischell Department of Biomedical Engineering, College of Engineering, University of Maryland, College Park (S.B., C.W., A.M.C.)
| | - Callie Weber
- Fischell Department of Biomedical Engineering, College of Engineering, University of Maryland, College Park (S.B., C.W., A.M.C.)
| | - Swathi Swaminathan
- School of Biomedical Engineering, Science, and Health Systems, Drexel University, Philadelphia, PA (S.E.B., S.S.)
| | - Yuji Zhang
- Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore (Y.Z.)
| | - Cholsoon Jang
- Biological Chemistry, Chao Family Comprehensive Cancer Center, University of California Irvine, Irvine (C.J.)
| | - Zoltan Arany
- Perelman School of Medicine, University of Pennsylvania, Philadelphia (Z.A.)
| | - Alisa Morss Clyne
- Fischell Department of Biomedical Engineering, College of Engineering, University of Maryland, College Park (S.B., C.W., A.M.C.)
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Howard EP, Retalic T, Rogan J, Murphy K, Swaminathan S, Altschuler A. ArtontheBrain: Results of a Pilot Project Among Long-Term Care Residents. Res Gerontol Nurs 2021; 14:235-243. [PMID: 34542348 DOI: 10.3928/19404921-20210825-03] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
For long-term care (LTC) residents, multiple barriers impede access to formal museum-based participa-tory art programming. Capitalizing on available technologies may circumvent common barriers and improve quality of life for those older adults even in the presence of dementia. Targets: A convenience sample of 31 older adults was recruited from the population of residents in one LTC facility. Intervention: ArtontheBrain, a web-based program, engages participants in activities centered on visual artwork, enabling users to learn about artists through activities, such as puzzles, storytelling, and group discussions. Mechanisms of Action: Researchers hypothesized that engagement with ArtontheBrain would benefit perceived quality of life in the domains of meaningful activity engagement and personal relationships and secondarily, improvements in functional performance, mood state, and cognitive performance may occur. Outcomes: Application of a quality of life survey pre and post ArtontheBrain intervention revealed significant improvements within the individual subsample for two activity options: engagement in enjoyable activities on weekends and evenings and explore new skills and interests. Total scores for the personal relationship scale had significant improvements post-intervention for the individual and group subsamples. The individual subsample demonstrated improvement in cognitive performance, which worsened for the group subsample. Mood and functional ability worsened for the entire sample.[Research in Gerontological Nursing, 14(5), 235-243.].
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Swaminathan S, Rao VG, Bera JK, Chandra M. The Pivotal Role of Hot Carriers in Plasmonic Catalysis of C-N Bond Forming Reaction of Amines. Angew Chem Int Ed Engl 2021; 60:12532-12538. [PMID: 33734534 DOI: 10.1002/anie.202101639] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [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: 02/02/2021] [Revised: 03/05/2021] [Indexed: 11/09/2022]
Abstract
Here, we demonstrate the simultaneous utilization of both the hot carriers (electrons and holes) in the photocatalytic transformation of benzylamine to N-benzylidenebenzylamine and the scope of reaction has also been successfully demonstrated with catalytic oxidation of 4-methoxybenzylamine. The wavelength-dependent excitation of AuNP allows us to tune the potential energy of charge carriers relative to the redox potential of the reactants which leads to energetically favorable product formation on the nanoparticle surface. We capture the formation of reaction intermediates and products by using in situ Raman spectroscopy, complemented by NMR spectroscopy and GC-MS. Based on the experimental substantiations, a plausible reaction mechanism has been proposed.
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Affiliation(s)
- Swathi Swaminathan
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Vishal Govind Rao
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Jitendra K Bera
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Manabendra Chandra
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, 208016, India
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16
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Swaminathan S, Rao VG, Bera JK, Chandra M. The Pivotal Role of Hot Carriers in Plasmonic Catalysis of C−N Bond Forming Reaction of Amines. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202101639] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Swathi Swaminathan
- Department of Chemistry Indian Institute of Technology Kanpur Kanpur 208016 India
| | - Vishal Govind Rao
- Department of Chemistry Indian Institute of Technology Kanpur Kanpur 208016 India
| | - Jitendra K. Bera
- Department of Chemistry Indian Institute of Technology Kanpur Kanpur 208016 India
| | - Manabendra Chandra
- Department of Chemistry Indian Institute of Technology Kanpur Kanpur 208016 India
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Kragness HE, Swaminathan S, Cirelli LK, Schellenberg EG. Individual differences in musical ability are stable over time in childhood. Dev Sci 2021; 24:e13081. [PMID: 33382177 DOI: 10.1111/desc.13081] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [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: 05/06/2020] [Revised: 09/30/2020] [Accepted: 12/24/2020] [Indexed: 11/30/2022]
Abstract
The development of human abilities stems from a complex interplay between genetic predispositions and environmental factors. Numerous studies have compared musicians with non-musicians on measures of musical and non-musical ability, frequently attributing musicians' superior performance to their training. By ignoring preexisting differences, however, this view assumes that taking music lessons is akin to random assignment. In the present longitudinal study, the musical ability of 5- to 10-year-olds was measured at Time 1 with a test of music perception and cognition. Five years later, at Time 2, the children took the same test and a second test designed for older listeners. The test-retest correlation for aggregate scores was remarkably high, r ≈ 0.7, and remained strong when confounding variables (age, cognitive abilities, personality) were held constant. At both time points, music training was associated with musical ability, but the association at Time 2 became nonsignificant when musical ability at Time 1 was held constant. Time 1 musical ability also predicted duration of subsequent music training. These data are consistent with results from genetic studies, which implicate genes in all aspects of musical behavior and achievement, and with meta-analyses, which indicate that transfer effects from music training are weak. In short, early musical abilities significantly predicted later abilities, demonstrating that individual differences are stable over time. We found no evidence, however, to suggest that music training predicted musical ability after accounting for prior ability. The results underscore the importance of considering preexisting abilities in any type of learning.
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Affiliation(s)
- Haley E Kragness
- Department of Psychology, University of Toronto Mississauga, Mississauga, ON, Canada.,Department of Psychology, University of Toronto Scarborough, Scarborough, ON, Canada
| | - Swathi Swaminathan
- Department of Psychology, University of Toronto Mississauga, Mississauga, ON, Canada.,Brain and Mind Institute, University of Western Ontario, London, ON, Canada
| | - Laura K Cirelli
- Department of Psychology, University of Toronto Scarborough, Scarborough, ON, Canada
| | - E Glenn Schellenberg
- Department of Psychology, University of Toronto Mississauga, Mississauga, ON, Canada.,Centro de Investigação e Intervenção Social (CIS-IUL), Instituto Universitário de Lisboa (ISCTE-IUL), Lisboa, Portugal
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Swaminathan S, Altschuler A, Howard EP, Hasher L, Murphy KJ. Implementing an arts‐based recreation program for older adults in care settings. Alzheimers Dement 2020. [DOI: 10.1002/alz.047462] [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)
- Swathi Swaminathan
- University of Toronto Toronto ON Canada
- Toronto Rehabilitation Institute Toronto ON Canada
- Baycrest Health Sciences Toronto ON Canada
| | | | | | - Lynn Hasher
- University of Toronto Toronto ON Canada
- Baycrest Health Sciences Toronto ON Canada
| | - Kelly J Murphy
- University of Toronto Toronto ON Canada
- Baycrest Health Sciences Toronto ON Canada
- York University Toronto ON Canada
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Swaminathan S. Impact of putative cilia targeting sequences on APP trafficking. Alzheimers Dement 2020. [DOI: 10.1002/alz.044841] [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: 11/06/2022]
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Abstract
Bioprinting is emerging as a promising tool to fabricate 3D human cancer models that better recapitulate critical hallmarks of in vivo tissue architecture. In current layer-by-layer extrusion bioprinting, individual cells are extruded in a bioink together with complex spatial and temporal cues to promote hierarchical tissue self-assembly. However, this biofabrication technique relies on complex interactions among cells, bioinks and biochemical and biophysical cues. Thus, self-assembly may take days or even weeks, may require specific bioinks, and may not always occur when there is more than one cell type involved. We therefore developed a technique to directly bioprint pre-formed 3D breast epithelial spheroids in a variety of bioinks. Bioprinted pre-formed 3D breast epithelial spheroids sustained their viability and polarized architecture after printing. We additionally printed the 3D spheroids onto vascular endothelial cell networks to create a co-culture model. Thus, the novel bioprinting technique rapidly creates a more physiologically relevant 3D human breast model at lower cost and with higher flexibility than traditional bioprinting techniques. This versatile bioprinting technique can be extrapolated to create 3D models of other tissues in additional bioinks.
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Murphy KJ, Swaminathan S, Howard E, Altschuler A, Rogan J, Beauchet O, Dupuis K, Galea LAM, Hogan D, Lingum N, Rowe G, Tsotsos L, Szczepura A, Wittich W, Xie F, Hasher L. Accessible Virtual Arts Recreation for Wellbeing Promotion in Long-Term Care Residents. J Appl Gerontol 2020; 40:519-528. [PMID: 33100108 DOI: 10.1177/0733464820967195] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [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: 11/15/2022] Open
Abstract
The efficacy of a technology-driven visual arts recreation activity, delivered virtually, was evaluated for its potential to achieve positive impacts, similar to traditional arts-interventions, on wellbeing in long-term care residents. Thirty-one residents (average age 86.8 years; SD = 9.4) engaged with the arts-intervention for 30-minutes, twice weekly, for 6 weeks with either a partner or as part of a group. Wellbeing indicators included self-reported psychological and health-related wellness, and attention capacity. Binomial tests of postintervention change revealed a significant above-chance probability of improvement in one or more wellbeing indicators (p < .05). Postparticipation feedback survey scores were positive (p < .05). Cognitive status did not influence outcome; however, other participant characteristics such as younger age, higher openness-to-experience (personality trait), and lower baseline mood were significantly associated with positive response to the intervention (p < .05). Findings demonstrate technology may be an effective platform for promoting accessibility to beneficial arts-interventions for older adults.
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Affiliation(s)
- Kelly J Murphy
- Baycrest Health Sciences and University of Toronto, Ontario, Canada
| | | | - Elizabeth Howard
- Hebrew SeniorLife, Boston, MA, USA.,Northeastern University, Boston, MA, USA
| | | | | | | | - Kate Dupuis
- Sheridan Centre for Elder Research, Oakville, Ontario, Canada
| | | | | | | | - Gillian Rowe
- Baycrest Health Sciences, Toronto, Ontario, Canada
| | - Lia Tsotsos
- Sheridan Centre for Elder Research, Oakville, Ontario, Canada
| | | | - Walter Wittich
- Université de Montréal, Québec, Canada.,Centre de recherche interdisciplinaire en réadaptation du Montréal métropolitain, Québec, Canada
| | - Feng Xie
- McMaster University, Hamilton, Ontario, Canada
| | - Lynn Hasher
- Baycrest Health Sciences and University of Toronto, Ontario, Canada
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Wang V, Swaminathan S, Corneau E, Maciejewski M, Trivedi A, O'Hare A, Mor V. Improving the Value of Care for Veterans: Impacts of VA Payment Reform for Community‐Based Dialysis. Health Serv Res 2020. [DOI: 10.1111/1475-6773.13510] [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: 11/27/2022] Open
Affiliation(s)
- V. Wang
- Durham VA Health Care System Durham NC United States
| | - S. Swaminathan
- Brown University School of Public Health Providence RI United States
| | - E. Corneau
- Providence VA Medical Center Providence RI United States
| | | | - A. Trivedi
- Brown University School of Public Health Providence RI United States
| | - A. O'Hare
- Veterans Affairs of Puget Sound Health Care System Seattle WA United States
| | - V. Mor
- Brown University Providence RI United States
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Fewings N, Schibeci S, Mckay F, Swaminathan S, Lin MW. FRI0011 DEVELOPMENT OF A HIGH-DIMENSIONAL FLOW CYTOMETRY PANEL TO ANALYSE NATURAL KILLER CELLS IN SLE. Ann Rheum Dis 2020. [DOI: 10.1136/annrheumdis-2020-eular.5105] [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: 11/04/2022]
Abstract
Background:Natural Killer (NK) cells are an innate immune cell type that has somewhat been overlooked in the context of systemic lupus erythematosus (SLE). SLE patients display a reduced number of NK cells with an activated phenotype and increased capacity to produce IFN-γ, decreased antibody-dependent cellular cytotoxicity (ADCC), and altered natural cytotoxicity (1). NK cell activation is determined by the integration of input from a myriad of activating and inhibitory receptors. Previously, using Nanostring® gene expression technologies, we found our SLE cohort showed decreased gene expression of a number of these receptors (KLRC2, KLRC1, KLRB1, KLRF1, KLRG1, PRF1 and IL2RB) leading us to explore NK cells in SLE in more depth.Objectives:Our aim was to develop a high-dimensional flow cytometry panel to characterise dysregulation of NK cell in SLE, with particular reference to the activating and inhibitory receptors found to be dysregulated in SLE at the gene expression level.Methods:Markers for NK panel were selected to include canonical phenotyping/functional molecules of NK cells with a particular emphasis on receptors found to be lower in our SLE cohort’s gene expression findings. NK panel was designed to minimise spectral overlap, expression and co-expression of markers was taken into consideration. Antibodies were titrated, and voltages optimised to achieve the best separation index for each of the antibodies. The 24-marker panel was run on 52 SLE patients of various disease manifestations, treatments and disease severity. 20 healthy controls were also run for comparison.Results:A 24-marker flow cytometry panel including 19 NK cell antigens was optimised, including basic phenotype (CD3/CD56/CD16/NKp46) and NK differentiation markers (CD57/CD94), activating and inhibitory receptors (NKG2A/NKG2C/NKG2D), costimulatory receptors (CD244/CD226), transcription factors (Eomes/Tbet) and effector molecules (granzyme/perforin). Immunophenotypic high-parameter analysis of SLE and control samples is in progress and results will be presented.Conclusion:Our development of a high-dimensional immunophenotypic panel allows identification of changes in NK cells in SLE including antigen expression levels, subset percentages and potentially of novel subsets. This panel will be used to investigate NK cell changes with disease course/activity, therapeutic response, and to discover potential drug targets for SLE.References:[1]Spada R, Rojas JM, Barber DF. Recent findings on the role of natural killer cells in the pathogenesis of systemic lupus erythematosus. J Leukocyte Biol. 2015;98(4):479-487. doi:10.1189/jlb.4ru0315-081rrAcknowledgments:Westmead Institute for Medical Research Genomics FacilityWestmead Institute for Medical Research Flow Cytometry FacilityStaff Specialists’ TESL and Trust Fund CommitteeDisclosure of Interests:None declared
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Bekker L, Li S, Pathak S, Tolley E, Marzinke M, Justman J, Mgodi N, Chirenje M, Swaminathan S, Adeyeye A, Farrior J, Hendrix C, Piwowar-Manning E, Richardson P, Eshelman S, Redinger H, Williams P, Sista N. Safety and tolerability of injectable Rilpivirine LA in HPTN 076: A phase 2 HIV pre-exposure prophylaxis study in women. EClinicalMedicine 2020; 21:100303. [PMID: 32280940 PMCID: PMC7139112 DOI: 10.1016/j.eclinm.2020.100303] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/10/2019] [Revised: 02/18/2020] [Accepted: 02/18/2020] [Indexed: 01/04/2023] Open
Abstract
BACKGROUND Daily oral TDF/FTC is protective against HIV infection when used for pre-exposure prophylaxis (PrEP). However, daily adherence to oral PrEP is difficult for many; therefore, finding alternative PrEP strategies remains a priority. HPTN 076 evaluated the long-acting injectable form of rilpivirine (RPV), known as RPV LA for safety, pharmacokinetics and acceptability. METHODS HPTN 076 (NTC 02165202) was a phase 2, double-blind, 2:1 randomized trial comparing the safety of 1200mg RPV LA (LA) to placebo (P). The study included a 28-day oral run-in phase of daily, self- administered oral RPV (25 mg), with directly observed oral dosing about six times. Of 136 enrolled sexually active, HIV-uninfected, low HIV-risk African (100) and US (36) adult women, injectable product was administered in two gluteal, intramuscular (IM) injections once every eight weeks to 122 participants following the oral run-in phase. A maximum of six injection time points occurred over a 48-week period. Acceptability, safety, tolerability and pharmacokinetic (PK) data were collected throughout the study. This paper includes primary endpoint data collected up to the week 52 post enrollment. FINDINGS The median age of the enrolled population was 31 years (IQR: 25,38), median weight 75 kg (IQR: 64, 89), median body mass index (BMI) 30 (IQR: 27, 35), 46% married, 94% Black and 60% unemployed. A total of 122 (80 LA, 42 P) women received at least one injection and 98 (64 LA, 34 P) received all six injections. During the injection phase, three women withdrew from the study (2 LA, 1 P) and 16 women discontinued study product (10 LA, 6 P). Fourteen women (11 LA and 3 P) discontinued oral study product and did not enter the injection phase. Study product discontinuations were not significantly different between the two arms throughout. Of the product discontinuations in the injection phase, 8% in LA and 5% in P arm were due to adverse events (AEs), including one randomized to the P arm with prolonged QTc interval on EKG. The proportion of women who experienced Grade 2 or higher AEs during the injection phase as the primary outcome was not significantly different between the two arms [73.8%, 95% CI: (63.2%, 82.1%) for LA and 73.8%, 95% CI: (58.9%, 84.7%), p>0.99]. Transient Grade ≥2 liver abnormalities occurred in 14% of women in the LA arm compared with 12% in P arm. Three LA women (4%) developed Grade 3 injection site reactions compared with none in P arm. In participants who received at least 1 injection, the geometric mean of overall RPV trough concentrations (Ctrough) was 62.2 ng/mL. In participants who received all six injections, the geometric mean of CTrough through the injection phase and after the last injection were 72.8 ng/mL and 100.9 ng/mL, respectively. At week 52 (eight weeks after last injection), the geometric mean of RPV Ctrough was 75.0 ng/mL. At the last injection visit (Week 44), 80 % of women who answered acceptability questions strongly agreed that they would think about using- and 68% that they would definitely use a PrEP injectable in the future. INTERPRETATION RPV LA IM injections every eight weeks in African and US women were safe and acceptable. Overall, despite more injection site reactions and pain in the participants receiving RPV LA the injections were well tolerated. Data from this study support the further development of injectable PrEP agents.
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Affiliation(s)
- L.G. Bekker
- The Desmond Tutu HIV Centre, University of Cape Town, South Africa
| | - S. Li
- Statistical Center for HIV/AIDS Research and Prevention, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | - S. Pathak
- Statistical Center for HIV/AIDS Research and Prevention, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | | | | | | | - N.M. Mgodi
- University of Zimbabwe College of Health Sciences Clinical Trials Research Centre, Harare, Zimbabwe
| | - M. Chirenje
- University of Zimbabwe College of Health Sciences Clinical Trials Research Centre, Harare, Zimbabwe
| | | | | | | | | | | | | | | | - H. Redinger
- Statistical Center for HIV/AIDS Research and Prevention, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | - P. Williams
- Johnson and Johnson Global Public Health, Belgium
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Garami L, Chow R, Fakuade A, Swaminathan S, Alain C. Orienting Attention to Auditory and Visual Short-term Memory: The Roles of Age, Hearing Loss, and Cognitive Status. Exp Aging Res 2019; 46:22-38. [DOI: 10.1080/0361073x.2019.1693008] [Citation(s) in RCA: 4] [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] [Indexed: 10/25/2022]
Affiliation(s)
- Linda Garami
- Rotman Research Institute, Baycrest Centre, Toronto, Ontario, Canada
| | - Ricky Chow
- Rotman Research Institute, Baycrest Centre, Toronto, Ontario, Canada
| | - Ayomide Fakuade
- Rotman Research Institute, Baycrest Centre, Toronto, Ontario, Canada
| | | | - Claude Alain
- Rotman Research Institute, Baycrest Centre, Toronto, Ontario, Canada
- Department of Psychology, University of Toronto, Toronto, Ontario, Canada
- Institute of Medical Sciences, University of Toronto, Toronto, Ontario, Canada
- School of Music, University of Toronto, Toronto, Ontario, Canada
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Abstract
We tested theories of links between musical expertise and language ability in a sample of 6- to 9-year-old children. Language ability was measured with tests of speech perception and grammar. Musical expertise was measured with a test of musical ability that had 3 subtests (melody discrimination, rhythm discrimination, and long-term memory for music) and as duration of music training. Covariates included measures of demographics, general cognitive ability (IQ, working memory), and personality (openness-to-experience). Music training was associated positively with performance on the grammar test, musical ability, IQ, openness, and age. Musical ability predicted performance on the tests of speech perception and grammar, as well as IQ, working memory, openness, and age. Regression analyses-with other variables held constant-revealed that language abilities had significant partial associations with musical ability and IQ but not with music training. Rhythm discrimination was a better predictor of language skills compared with melody discrimination, but memory for music was equally good. Bayesian analyses confirmed the results from the standard analyses. The implications of the findings are threefold: (a) musical ability predicts language ability, and the association is independent of IQ and other confounding variables; (b) links between music and language appear to arise primarily from preexisting factors and not from formal training in music; and (c) evidence for a special link between rhythm and language may emerge only when rhythm discrimination is compared with melody discrimination. (PsycInfo Database Record (c) 2021 APA, all rights reserved).
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Stott KE, Pertinez H, Sturkenboom MGG, Boeree MJ, Aarnoutse R, Ramachandran G, Requena-Méndez A, Peloquin C, Koegelenberg CFN, Alffenaar JWC, Ruslami R, Tostmann A, Swaminathan S, McIlleron H, Davies G. Pharmacokinetics of rifampicin in adult TB patients and healthy volunteers: a systematic review and meta-analysis. J Antimicrob Chemother 2019; 73:2305-2313. [PMID: 29701775 PMCID: PMC6105874 DOI: 10.1093/jac/dky152] [Citation(s) in RCA: 63] [Impact Index Per Article: 12.6] [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: 01/19/2018] [Accepted: 03/31/2018] [Indexed: 12/29/2022] Open
Abstract
Objectives The objectives of this study were to explore inter-study heterogeneity in the pharmacokinetics (PK) of orally administered rifampicin, to derive summary estimates of rifampicin PK parameters at standard dosages and to compare these with summary estimates for higher dosages. Methods A systematic search was performed for studies of rifampicin PK published in the English language up to May 2017. Data describing the Cmax and AUC were extracted. Meta-analysis provided summary estimates for PK parameter estimates at standard rifampicin dosages. Heterogeneity was assessed by estimation of the I2 statistic and visual inspection of forest plots. Summary AUC estimates at standard and higher dosages were compared graphically and contextualized using preclinical pharmacodynamic (PD) data. Results Substantial heterogeneity in PK parameters was evident and upheld in meta-regression. Treatment duration had a significant impact on the summary estimates for rifampicin PK parameters, with Cmax 8.98 mg/L (SEM 2.19) after a single dose and 5.79 mg/L (SEM 2.14) at steady-state dosing, and AUC 72.56 mg·h/L (SEM 2.60) and 38.73 mg·h/L (SEM 4.33) after single and steady-state dosing, respectively. Rifampicin dosages of at least 25 mg/kg are required to achieve plasma PK/PD targets defined in preclinical studies. Conclusions Vast inter-study heterogeneity exists in rifampicin PK parameter estimates. This is not explained by the available modifying variables. The recommended dosage of rifampicin should be increased to improve efficacy. This study provides an important point of reference for understanding rifampicin PK at standard dosages as efforts to explore higher dosing strategies continue in this field.
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Affiliation(s)
- K E Stott
- Department of Molecular and Clinical Pharmacology, Institute of Translational Medicine, University of Liverpool, Liverpool, UK
| | - H Pertinez
- Department of Molecular and Clinical Pharmacology, Institute of Translational Medicine, University of Liverpool, Liverpool, UK
| | - M G G Sturkenboom
- Department of Clinical Pharmacy and Pharmacology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - M J Boeree
- Radboud University Medical Center, Nijmegen, The Netherlands
| | - R Aarnoutse
- Radboud University Medical Center, Nijmegen, The Netherlands
| | - G Ramachandran
- Department of Biochemistry and Clinical Pharmacology, National Institute for Research in Tuberculosis, Chennai, India
| | - A Requena-Méndez
- CRESIB, Barcelona Institute for Global Health, University of Barcelona, Barcelona, Spain
| | - C Peloquin
- College of Pharmacy and Emerging Pathogens Institute, University of Florida, Gainesville, FL, USA
| | - C F N Koegelenberg
- Department of Pulmonology, Stellenbosch University & Tygerberg Academic Hospital, Cape Town, South Africa
| | - J W C Alffenaar
- Department of Clinical Pharmacy and Pharmacology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - R Ruslami
- Department of Pharmacology and Therapy, Universitas Padjadjaran, Bandung, Indonesia
| | - A Tostmann
- Department of Primary and Community Care, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - S Swaminathan
- Indian Council of Medical Research, New Delhi, India
| | - H McIlleron
- Division of Clinical Pharmacology, University of Cape Town, Cape Town, South Africa
| | - G Davies
- Department of Molecular and Clinical Pharmacology, Institute of Translational Medicine, University of Liverpool, Liverpool, UK.,Institute of Global Health, University of Liverpool, Liverpool, UK
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Swaminathan S, Cranston AN, Clyne AM. A Three-Dimensional In Vitro Coculture Model to Quantify Breast Epithelial Cell Adhesion to Endothelial Cells. Tissue Eng Part C Methods 2019; 25:609-618. [PMID: 31441384 PMCID: PMC7718851 DOI: 10.1089/ten.tec.2019.0122] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Accepted: 08/20/2019] [Indexed: 12/12/2022] Open
Abstract
Three-dimensional (3D) in vitro culture models better recapitulate the tissue microenvironment, and therefore may provide a better platform to evaluate therapeutic effects on adhesive cell-cell interactions. The objective of this study was to determine if AD-01, a peptide derivative of FK506-binding protein like that is reported to bind to the adhesion receptor CD44, would induce a greater reduction in breast epithelial spheroid adhesion to endothelial tube-like networks in our 3D coculture model system compared to two-dimensional (2D) culture. MCF10A, MCF10A-NeuN, MDA-MB-231, and MCF7 breast epithelial cells were pretreated with AD-01 either as single cells or as spheroids. Breast epithelial cell adhesion to 2D tissue culture substrates was first measured, followed by spheroid formation (breast cell-cell adhesion) and spheroid adhesion to Matrigel or endothelial networks. Finally, CD44 expression was quantified in breast epithelial cells in 2D and 3D culture. Our results show that AD-01 had the largest effect on spheroid formation, specifically in breast cancer cell lines. AD-01 also inhibited breast cancer spheroid adhesion to and migration along endothelial networks. The different breast epithelial cell lines expressed more CD44 when cultured as 3D spheroids, but this did not universally translate into higher protein levels. This study shows that 3D coculture models can enable unique insights into cell adhesion, migration, and cell-cell interactions, thereby enhancing understanding of basic biological mechanisms. Furthermore, such 3D coculture systems may also represent a more relevant testing platform for understanding the mechanism-of-action of new therapeutic agents. Impact Statement Cell adhesion is inherently different in two dimensional (2D) compared to three dimensional (3D) culture; yet, most adhesion assays in academia and industry are still conducted in 2D because few simple, yet effective, adhesion models exist in 3D. Recently we developed a 3D in vitro coculture model to examine breast epithelial spheroid interactions with endothelial tubes. We now show that this 3D coculture model can effectively be used to interrogate and quantify drug-induced differences in breast epithelial cell adhesion that are unique to 3D cocultures. This 3D coculture adhesion model can furthermore be modified for use with other cell types to better predict drug effects on cell-vasculature adhesion.
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Affiliation(s)
- Swathi Swaminathan
- Mechanical Engineering and Mechanics, Drexel University, Philadelphia, Pennsylvania
| | - Aaron N. Cranston
- Centre for Precision Therapeutics, Health Sciences Building, Almac Discovery Ltd., Belfast, United Kingdom
| | - Alisa Morss Clyne
- Fischell Department of Bioengineering, University of Maryland, College Park, Maryland
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Shivakumar SVBY, Chandrasekaran P, Kumar AMV, Paradkar M, Dhanasekaran K, Suryavarshini N, Thomas B, Kohli R, Thiruvengadam K, Kulkarni V, Hannah LE, Sivaramakrishnan GN, Pradhan N, Dolla C, Gupte A, Ramachandran G, DeLuca A, Meshram S, Bhardawaj R, Bollinger RC, Golub J, Selvaraj K, Gupte N, Swaminathan S, Mave V, Gupta A. Diabetes and pre-diabetes among household contacts of tuberculosis patients in India: is it time to screen them all? Int J Tuberc Lung Dis 2019; 22:686-694. [PMID: 29862955 DOI: 10.5588/ijtld.17.0598] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
SETTING Pre-diabetes mellitus (pre-DM) and DM increase the risk of developing tuberculosis (TB). Screening contacts of TB patients for pre-DM/DM and linking them to care may mitigate the risk of developing TB and improve DM management. OBJECTIVE To measure the prevalence of pre-DM/DM and associated factors among the adult household contacts (HHCs) of pulmonary TB patients. METHODS Between August 2014 and May 2017, adult HHCs of newly diagnosed adult PTB patients in Pune and Chennai, India, had single blood samples tested for glycosylated haemoglobin (HbA1c) at enrolment. DM was defined as previously diagnosed, self-reported DM or HbA1c 6.5%, and pre-DM as HbA1c between 5.7% and 6.4%. Latent tuberculous infection (LTBI) was defined as a positive tuberculin skin test (5 mm induration) or QuantiFERON® Gold In-Tube (0.35 international units/ml). RESULTS Of 652 adult HHCs, 175 (27%) had pre-DM and 64 (10%) had DM. Forty (64%) HHCs were newly diagnosed with DM and 48 (75%) had poor glycaemic control (HbA1c 7.0%). Sixty-eight (22%) pre-DM cases were aged 18-34 years. Age 35 years, body mass index 25 kg/m2, chronic disease and current tobacco smoking were significantly associated with DM among HHCs. CONCLUSIONS Adult HHCs of TB patients in India have a high prevalence of undiagnosed DM, pre-DM and LTBI, putting them at high risk for developing TB. Routine DM screening should be considered among all adult HHCs of TB.
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Affiliation(s)
| | - P Chandrasekaran
- National Institute for Research in Tuberculosis, Chennai, Tamil Nadu, India
| | - A M V Kumar
- International Union Against Tuberculosis and Lung Disease, Paris, France
| | - M Paradkar
- Byramjee Jeejeebhoy Government Medical College, Johns Hopkins University Clinical Research site, Pune, Maharashtra, India
| | - K Dhanasekaran
- National Institute for Research in Tuberculosis, Chennai, Tamil Nadu, India
| | - N Suryavarshini
- Byramjee Jeejeebhoy Government Medical College, Johns Hopkins University Clinical Research site, Pune, Maharashtra, India
| | - B Thomas
- National Institute for Research in Tuberculosis, Chennai, Tamil Nadu, India
| | - R Kohli
- Byramjee Jeejeebhoy Government Medical College, Johns Hopkins University Clinical Research site, Pune, Maharashtra, India
| | - K Thiruvengadam
- National Institute for Research in Tuberculosis, Chennai, Tamil Nadu, India
| | - V Kulkarni
- Byramjee Jeejeebhoy Government Medical College, Johns Hopkins University Clinical Research site, Pune, Maharashtra, India
| | - L E Hannah
- National Institute for Research in Tuberculosis, Chennai, Tamil Nadu, India
| | | | - N Pradhan
- Byramjee Jeejeebhoy Government Medical College, Johns Hopkins University Clinical Research site, Pune, Maharashtra, India
| | - C Dolla
- National Institute for Research in Tuberculosis, Chennai, Tamil Nadu, India
| | - A Gupte
- Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
| | - G Ramachandran
- National Institute for Research in Tuberculosis, Chennai, Tamil Nadu, India
| | - A DeLuca
- Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA, Johns Hopkins School of Medicine, Baltimore, Maryland, USA
| | - S Meshram
- Byramjee Jeejeebhoy Government Medical College, Johns Hopkins University Clinical Research site, Pune, Maharashtra, India, Byramjee Jeejeebhoy Government Medical College, Pune, India
| | - R Bhardawaj
- Byramjee Jeejeebhoy Government Medical College, Johns Hopkins University Clinical Research site, Pune, Maharashtra, India, Byramjee Jeejeebhoy Government Medical College, Pune, India
| | - R C Bollinger
- Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA, Johns Hopkins School of Medicine, Baltimore, Maryland, USA
| | - J Golub
- Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA, Johns Hopkins School of Medicine, Baltimore, Maryland, USA
| | - K Selvaraj
- Pondicherry Institute of Medical Sciences (PIMS), Puducherry
| | - N Gupte
- Byramjee Jeejeebhoy Government Medical College, Johns Hopkins University Clinical Research site, Pune, Maharashtra, India, Johns Hopkins School of Medicine, Baltimore, Maryland, USA
| | - S Swaminathan
- Indian Council of Medical Research, New Delhi, India
| | - V Mave
- Byramjee Jeejeebhoy Government Medical College, Johns Hopkins University Clinical Research site, Pune, Maharashtra, India, Johns Hopkins School of Medicine, Baltimore, Maryland, USA
| | - A Gupta
- Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA, Johns Hopkins School of Medicine, Baltimore, Maryland, USA
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Abstract
Design and fabrication of effective biomimetic vasculatures constitutes a relevant and yet unsolved challenge, lying at the heart of tissue repair and regeneration strategies. Even if cell growth is achieved in 3D tissue scaffolds or advanced implants, tissue viability inevitably requires vascularization, as diffusion can only transport nutrients and eliminate debris within a few hundred microns. This engineered vasculature may need to mimic the intricate branching geometry of native microvasculature, referred to herein as vascular complexity, to efficiently deliver blood and recreate critical interactions between the vascular and perivascular cells as well as parenchymal tissues. This review first describes the importance of vascular complexity in labs- and organs-on-chips, the biomechanical and biochemical signals needed to create and maintain a complex vasculature, and the limitations of current 2D, 2.5D, and 3D culture systems in recreating vascular complexity. We then critically review available strategies for design and biofabrication of complex vasculatures in cell culture platforms, labs- and organs-on-chips, and tissue engineering scaffolds, highlighting their advantages and disadvantages. Finally, challenges and future directions are outlined with the hope of inspiring researchers to create the reliable, efficient and sustainable tools needed for design and biofabrication of complex vasculatures.
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Affiliation(s)
- Alisa Morss Clyne
- Vascular Kinetics Laboratory, Mechanical Engineering & Mechanics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, United States of America
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Abstract
3D human cancer models provide a better platform for drug efficacy studies than conventional 2D culture, since they recapitulate important aspects of the in vivo microenvironment. While biofabrication has advanced model creation, bioprinting generally involves extruding individual cells in a bioink and then waiting for these cells to self-assemble into a hierarchical 3D tissue. This self-assembly is time consuming and requires complex cellular interactions with other cell types, extracellular matrix components, and growth factors. We therefore investigated if we could directly bioprint pre-formed 3D spheroids in alginate-based bioinks to create a model tissue that could be used almost immediately. Human breast epithelial cell lines were bioprinted as individual cells or as pre-formed spheroids, either in monoculture or co-culture with vascular endothelial cells. While individual breast cells only spontaneously formed spheroids in Matrigel-based bioink, pre-formed breast spheroids maintained their viability, architecture, and function after bioprinting. Bioprinted breast spheroids were more resistant to paclitaxel than individually printed breast cells; however, this effect was abrogated by endothelial cell co-culture. This study shows that 3D cellular structure bioprinting has potential to create tissue models that quickly replicate the tumor microenvironment.
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Affiliation(s)
- Swathi Swaminathan
- Department of Mechanical Engineering and Mechanics, Drexel University, Philadelphia, PA 19104, United States of America
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Swaminathan S, Schellenberg EG. Musical Competence is Predicted by Music Training, Cognitive Abilities, and Personality. Sci Rep 2018; 8:9223. [PMID: 29907812 PMCID: PMC6003980 DOI: 10.1038/s41598-018-27571-2] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Accepted: 06/06/2018] [Indexed: 12/17/2022] Open
Abstract
Individuals differ in musical competence, which we defined as the ability to perceive, remember, and discriminate sequences of tones or beats. We asked whether such differences could be explained by variables other than music training, including socioeconomic status (SES), short-term memory, general cognitive ability, and personality. In a sample of undergraduates, musical competence had positive simple associations with duration of music training, SES, short-term memory, general cognitive ability, and openness-to-experience. When these predictors were considered jointly, musical competence had positive partial associations with music training, general cognitive ability, and openness. Nevertheless, moderation analyses revealed that the partial association between musical competence and music training was evident only among participants who scored below the mean on our measure of general cognitive ability. Moreover, general cognitive ability and openness had indirect associations with musical competence by predicting music training, which in turn predicted musical competence. Musical competence appears to be the result of multiple factors, including but not limited to music training.
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Affiliation(s)
- Swathi Swaminathan
- Department of Psychology, University of Toronto Mississauga, Mississauga, L5L 1C6, Canada
| | - E Glenn Schellenberg
- Department of Psychology, University of Toronto Mississauga, Mississauga, L5L 1C6, Canada.
- Faculty of Music, University of Toronto, Toronto, M5S 2C5, Canada.
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Thomas B, Watson B, Senthil EK, Deepalakshmi A, Balaji G, Chandra S, Manogaran C, Nagarajan K, Ovung S, Jayabal L, Swaminathan S. Alcohol intervention strategy among tuberculosis patients: a pilot study from South India. Int J Tuberc Lung Dis 2018; 21:947-952. [PMID: 28786805 DOI: 10.5588/ijtld.16.0693] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Alcohol dependence has been a major cause of treatment non-adherence in tuberculosis (TB) management. There is an urgent need to develop a feasible, acceptable alcohol intervention programme to ensure treatment completion. METHODOLOGY Four of the 10 Chennai Corporation zones in Chennai, South India, were randomly selected: two each for the experimental and control arms of the study. TB patients registered from August 2013 to January 2014 with the Revised National Tuberculosis Control Programme were assessed using the Alcohol Use Disorder Identification Test (AUDIT) scale. The intervention consisted of four individual counselling sessions at months 0, 2, 4 and 6 conducted by highly trained interventionists. RESULTS Of 872 TB patients, 298 (31%) were found to have alcohol use disorders. The numbers of TB patients in the experimental and control arms were respectively 113 (38%) and 185 (62%). The proportion of patients with favourable treatment outcomes was higher in the intervention than in the control group (87% vs. 62%, P = 0.04). Overall adherence to anti-tuberculosis treatment was significantly higher in the intervention group (P = 0.02). CONCLUSION Study findings suggest that alcohol interventions could be effective in ensuring favourable TB treatment outcomes and adherence. This calls for a large cluster randomised trial for greater generalisability. Tested alcohol-intervention strategies should be recommended to promote treatment adherence among TB patients who consume alcohol.
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Affiliation(s)
- B Thomas
- National Institute for Research in Tuberculosis (formerly Tuberculosis Research Centre), Indian Council of Medical Research (ICMR), Chennai, India
| | - B Watson
- National Institute for Research in Tuberculosis (formerly Tuberculosis Research Centre), Indian Council of Medical Research (ICMR), Chennai, India
| | - E K Senthil
- National Institute for Research in Tuberculosis (formerly Tuberculosis Research Centre), Indian Council of Medical Research (ICMR), Chennai, India
| | - A Deepalakshmi
- National Institute for Research in Tuberculosis (formerly Tuberculosis Research Centre), Indian Council of Medical Research (ICMR), Chennai, India
| | - G Balaji
- National Institute for Research in Tuberculosis (formerly Tuberculosis Research Centre), Indian Council of Medical Research (ICMR), Chennai, India
| | - S Chandra
- National Institute for Research in Tuberculosis (formerly Tuberculosis Research Centre), Indian Council of Medical Research (ICMR), Chennai, India
| | - C Manogaran
- National Institute for Research in Tuberculosis (formerly Tuberculosis Research Centre), Indian Council of Medical Research (ICMR), Chennai, India
| | - K Nagarajan
- National Institute for Research in Tuberculosis (formerly Tuberculosis Research Centre), Indian Council of Medical Research (ICMR), Chennai, India
| | - S Ovung
- National Institute for Research in Tuberculosis (formerly Tuberculosis Research Centre), Indian Council of Medical Research (ICMR), Chennai, India
| | - L Jayabal
- Corporation of Chennai, Chennai, India
| | - S Swaminathan
- Department of Health Research & ICMR, New Delhi, India
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Swaminathan S. When is positive affective response to sad-sounding music paradoxical?: Comment on "An integrative review of the enjoyment of sadness associated with music" by Tuomas Eerola et al. Phys Life Rev 2018; 25:154-155. [PMID: 29605521 DOI: 10.1016/j.plrev.2018.03.015] [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] [Received: 03/23/2018] [Accepted: 03/26/2018] [Indexed: 10/17/2022]
Affiliation(s)
- Swathi Swaminathan
- Rotman Research Institute and the Department of Neuropsychology and Cognitive Health, Baycrest Health Sciences, Canada.
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Rajan KS, Swaminathan S, Vaidhyasubramaniam S. Research Output of Indian Institutions during 2011–2016:Quality and Quantity Perspective. CURR SCI INDIA 2018. [DOI: 10.18520/cs/v114/i04/740-746] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Velayutham B, Nair D, Kannan T, Padmapriyadarsini C, Sachdeva KS, Bency J, Klinton JS, Haldar S, Khanna A, Jayasankar S, Swaminathan S. Factors associated with sputum culture conversion in multidrug-resistant pulmonary tuberculosis. Int J Tuberc Lung Dis 2018; 20:1671-1676. [PMID: 27931345 DOI: 10.5588/ijtld.16.0096] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
INTRODUCTION Sputum culture conversion in pulmonary multidrug-resistant tuberculosis (MDR-TB) is important to make treatment-related decisions and prevent transmission of disease. OBJECTIVE To identify factors associated with sputum culture conversion, and to determine time to culture conversion and the impact of culture conversion on successful treatment outcomes in MDR-/rifampicin (RMP) resistant TB. METHOD Retrospective analysis of data from treatment cards and registers of MDR-/RMP-resistant patients initiated on treatment under India's Revised National TB Control Programme in Delhi, West Bengal and Kerala from January 2009 to December 2011. Proportions were calculated and logistic regression analysis was performed. RESULTS Of 836 patients, 787 were analysed, 651 (83%) of whom experienced culture conversion: respectively 57%, 73% and 79% culture converted by month 3, 4 and 6 of treatment. The median time to culture conversion was 91.3 days. Patients with body mass index (BMI) 16 kg/m2 (OR 0.403, P = 0.001) and 1618 kg/m2 (OR 0.519, P = 0.039) were less likely to have culture conversion. High rates of culture conversion were observed in patients with successful treatment outcomes compared to those without treatment success (462/469, 99% vs. 183/311, 59%; P 0.0001). CONCLUSION Low BMI is associated with poor sputum culture conversion in MDR-/RMP-resistant TB patients. Lack of culture conversion can impact successful treatment outcomes.
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Affiliation(s)
- B Velayutham
- National Institute for Research in Tuberculosis, Chennai
| | - D Nair
- National Institute for Research in Tuberculosis, Chennai
| | - T Kannan
- National Institute for Research in Tuberculosis, Chennai
| | | | - K S Sachdeva
- Central TB Division, Ministry of Health and Family Welfare, New Delhi
| | - J Bency
- National Institute for Research in Tuberculosis, Chennai
| | - J S Klinton
- National Institute for Research in Tuberculosis, Chennai
| | - S Haldar
- State TB Cell-West Bengal, Central TB Division, Kolkata
| | - A Khanna
- State TB Cell-Delhi, Central TB Division, New Delhi
| | - S Jayasankar
- State TB Cell-Kerala, Central TB Division, Thiruvananthapuram
| | - S Swaminathan
- Indian Council of Medical Research, New Delhi, India
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Hemanth Kumar AK, Kannan T, Chandrasekaran V, Sudha V, Vijayakumar A, Ramesh K, Lavanya J, Swaminathan S, Ramachandran G. Pharmacokinetics of thrice-weekly rifampicin, isoniazid and pyrazinamide in adult tuberculosis patients in India. Int J Tuberc Lung Dis 2018; 20:1236-41. [PMID: 27510252 DOI: 10.5588/ijtld.16.0048] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
OBJECTIVE To study the pharmacokinetics of rifampicin (RMP), isoniazid (INH) and pyrazinamide (PZA) in adult tuberculosis (TB) patients and examine factors that influence drug pharmacokinetics. METHODS Adult TB patients (n = 101) receiving thrice-weekly anti-tuberculosis treatment in the Revised National TB Control Programme (RNTCP) were studied. The study was conducted at steady state after directly observed drug administration. RMP, INH and PZA concentrations were estimated using high-performance liquid chromatography and NAT2 genotyping by real-time polymerase chain reaction. RESULTS RMP peak concentration (Cmax) was sub-therapeutic (<8 μg/ml) in 88% of the patients. The Cmax of RMP, INH and PZA at 2 h was observed in respectively 83.2%, 97.0% and 92.1% of the patients. The Cmax and area under the curve from 0 to 8 h (AUC0-8) of PZA was lower in TB patients with diabetes mellitus than in non-diabetics. Significant associations were observed between the Cmax and the AUC0-8 of RMP, INH and PZA with drug doses; RMP with category of treatment; INH with smoking, body mass index and N-acetyl transferase 2 genotype; and PZA with sex and smoking. CONCLUSIONS Several risk factors for drug concentration variations were identified. Two-hour post-dosing drug concentrations mimicked Cmax. A high proportion of TB patients had RMP Cmax below the expected range, which is a matter of concern.
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Affiliation(s)
| | - T Kannan
- National Institute for Research in Tuberculosis, Chennai, India
| | | | - V Sudha
- National Institute for Research in Tuberculosis, Chennai, India
| | - A Vijayakumar
- National Institute for Research in Tuberculosis, Chennai, India
| | - K Ramesh
- National Institute for Research in Tuberculosis, Chennai
| | | | - S Swaminathan
- National Institute for Research in Tuberculosis, Chennai, India
| | - G Ramachandran
- National Institute for Research in Tuberculosis, Chennai, India
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Parchure R, Kulkarni V, Gangakhedkar R, Swaminathan S. Treatment outcomes of daily anti-tuberculosis treatment in HIV-infected patients seeking care at a private clinic in India. Int J Tuberc Lung Dis 2018; 20:1348-1353. [PMID: 27725046 DOI: 10.5588/ijtld.16.0098] [Citation(s) in RCA: 2] [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: 11/10/2022] Open
Abstract
SETTING Little is known about outcomes of patients co-infected with human immunodeficiency virus (HIV) and tuberculosis (TB) who are treated in the private sector in India. OBJECTIVE To describe the treatment outcomes of daily anti-tuberculosis treatment (ATT) and their determinants among HIV-TB co-infected patients treated at a private clinic in Pune, India. DESIGN Data on adult HIV-TB co-infected patients treated with daily ATT were analysed using logistic regression and Cox model to assess risk factors for default and death. RESULTS Of 769 cases, 78% were aged <45 years, 71% were males, 64% had CD4 < 200 cells/mm3, 67% were antiretroviral treatment (ART) naïve at TB diagnosis, 53% had extra-pulmonary TB, and 12% had a past history of TB. ATT was successfully completed by 58.5%, 34.3% defaulted (i.e., discontinued ATT for >2 months) and 3.9% died during ATT. The risk of default was higher among males (aOR 1.67, 95%CI 1.17-2.39), ART-naïve patients (aOR 1.91, 95%CI 1.34-2.73) and those with a past history of TB (aOR 1.86, 95%CI 1.15-3.01). Survival probability at 365 days was 95% (95%CI 93-97). The risk of death was higher among patients with CD4 < 50 cells/mm3 (aHR 4.63, 95%CI 1.47-14.65) than in those with CD4 > 200 cells/mm3. CONCLUSIONS Low overall mortality was seen with daily ATT in HIV-TB co-infected patients. High default rates in private facilities warrant urgent attention.
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Affiliation(s)
| | | | - R Gangakhedkar
- National AIDS Research Institute, Pune, India; Indian Council of Medical Research, New Delhi, India
| | - S Swaminathan
- Indian Council of Medical Research, New Delhi, India
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Swaminathan S, Schellenberg EG, Venkatesan K. Explaining the association between music training and reading in adults. J Exp Psychol Learn Mem Cogn 2018; 44:992-999. [PMID: 29389190 DOI: 10.1037/xlm0000493] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
We sought to clarify whether the positive association between music lessons and reading ability is explained better by shared resources for processing pitch and temporal information, or by general cognitive abilities. Participants were native and nonnative speakers of English with varying levels of music training. We measured reading ability (comprehension and speed), music-perception skills (melody and rhythm), general cognitive ability (nonverbal intelligence, short-term memory, and working memory), and socioeconomic status (SES; family income, parents' education). Reading ability was associated positively with music training, English as a native language, and general cognitive ability. The association between reading and music training was significant after SES, native language, and music-perception skills were controlled. After general cognitive abilities were held constant, however, there was no longer an association between reading and music training. These findings suggest that the association between reading ability and music training is a consequence of general cognitive abilities. (PsycINFO Database Record
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Abstract
Endothelial cell interactions with normal and cancerous breast epithelial cells have been widely studied in tissue growth and development, as well as in angiogenesis and metastasis. Despite the understanding that 3D multicellular architecture is critical to the cell phenotype, 3D vascular structures have not yet been cocultured with 3D breast spheroids in vitro. The objective of this study was therefore to create a hierarchical, multiscale model of vascular endothelial-breast epithelial cell interactions in which both cell types were assembled into their 3D architectures. The model was successfully fabricated by adding preformed breast spheroids onto preformed endothelial tube-like networks. Through this model, we observed that breast spheroids maintain vascular tube-like networks. Over time, breast epithelial cells migrate out of the spheroid structure along the endothelial networks. This research shows that 3D cell structures serve as an important building block for creating multicellular coculture models to study physiologically relevant cell-cell interactions.
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Affiliation(s)
- Swathi Swaminathan
- Drexel University, 3141 Chestnut Street, Philadelphia, Pennsylvania 19104, United States
| | - Olivia Ngo
- Drexel University, 3141 Chestnut Street, Philadelphia, Pennsylvania 19104, United States
| | - Sarah Basehore
- Drexel University, 3141 Chestnut Street, Philadelphia, Pennsylvania 19104, United States
| | - Alisa Morss Clyne
- Drexel University, 3141 Chestnut Street, Philadelphia, Pennsylvania 19104, United States
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Narendran G, Swaminathan S. TB-HIV co-infection: a catastrophic comradeship. Oral Dis 2017; 22 Suppl 1:46-52. [PMID: 27109272 DOI: 10.1111/odi.12389] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [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: 02/23/2015] [Revised: 08/07/2015] [Accepted: 11/12/2015] [Indexed: 11/30/2022]
Abstract
The symbiotic association of tuberculosis (TB) and HIV poses a challenge to human survival. HIV complicates every aspect of TB including presentation, diagnosis and treatment. HIV-TB patients encounter unique problems like drug-drug interactions, cumulative toxicity, immune reconstitution inflammatory syndrome (IRIS), lower plasma drug levels and emergence of drug resistance during treatment despite adherence. TB may also be overdiagnosed in HIV due to a number of diseases that closely resemble TB. Notable among them are non-tuberculous mycobacteria, Pneumocystis Jirovecii and Nocardia. Even though diagnostic procedures have improved over the years, patients in developing countries usually seek health care at later stage of the disease. Research data ascertains the duration of therapy for TB to be 6 months with rifampicin and isoniazid, reinforced with ethambutol and pyrazinamide in the first 2 months. The schedule of therapy is still debatable with daily regimens being preferred in the context of HIV. Many reasons exist for persistence of Mycobacterium Tuberculosis (M.TB) in sputum, or delayed-clearance of TB from sputum smears in HIV, apart from emergence of drug resistance and non-compliance. Acquired rifampicin resistance (ARR) is a unique phenomenon complicating HIV-associated TB when an intermittent regimen of antituberculosis therapy (ATT) is used without timely initiation of highly active antiretroviral therapy (HAART), especially in patients harbouring isoniazid-resistant strains Immune restoration is often incomplete ('swiss cheese' pattern) even with effective HAART if not started early. Immune reconstitution inflammatory syndrome (IRIS) is the paradoxical worsening of the patient's condition often with radiological deterioration, due to an enhanced immune response with HAART. IRIS occurs despite an effective virological suppression and a favourable response to ATT. The incidence of IRIS in HIV has reached up to 54%, requiring utilization of experts and tertiary care which forms an obstacle to the decentralization of patients in the ART programme. Research in HIV-TB immunology and management needs further exploration in order to understand the diseases and offer appropriate treatment. The following paragraphs provide scientific evidences generated through research that could potentially guide management.
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Affiliation(s)
- G Narendran
- National Institute for Research in Tuberculosis, Chennai, India
| | - S Swaminathan
- National Institute for Research in Tuberculosis, Chennai, India
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Devi NP, Kumar AMV, Chinnakali P, Rajendran M, Valan AS, Rewari BB, Swaminathan S. Loss to follow-up among children in pre-ART care under the National AIDS Programme, Tamil Nadu, South India. Public Health Action 2017; 7:90-94. [PMID: 28695080 DOI: 10.5588/pha.16.0112] [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: 11/22/2016] [Accepted: 03/03/2017] [Indexed: 11/10/2022] Open
Abstract
Setting: Children aged <15 years constitute 7% of all people living with the human immunodeficiency virus (HIV) in India. A previous study from an antiretroviral therapy (ART) centre in south India reported 82% loss to follow-up (LTFU) among children in pre-ART care (2006-2011). Objective: To assess the proportion of LTFU within 1 year of registration among HIV-infected children (aged < 15 years) registered in all 43 ART centres in the state of Tamil Nadu, India, during the year 2012. Design: This was a retrospective cohort study involving a review of programme records. Results: Of 656 children registered for HIV care, 20 (3%) were not assessed for ART eligibility. Of those remaining, 226 (36%) were not ART eligible and entered pre-ART care. Among these, at 1 year of registration, 50 (22%) were LTFU, 40 (18%) were transferred out and 136 (60%) were retained in care at the same centre. The child's age, sex, World Health Organization stage or occurrence of opportunistic infection were not associated with LTFU. Conclusion: One in five children registered under pre-ART care were lost to follow-up. Stronger measures to prevent LTFU and reinforce retrieval actions are necessary in the existing National HIV Programme.
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Affiliation(s)
- N P Devi
- National Institute for Research in Tuberculosis, Madurai, India
| | - A M V Kumar
- International Union Against Tuberculosis and Lung Disease, (The Union) Paris, France.,The Union South-East Asia Office, New Delhi, India
| | - P Chinnakali
- Jawaharlal Institute of Postgraduate Medical Education and Research, Puducherry, India
| | - M Rajendran
- National Institute for Research in Tuberculosis, Madurai, India
| | - A S Valan
- India Epidemic Intelligence Service, National Centre for Disease Control, New Delhi, India
| | - B B Rewari
- National AIDS Control Organisation, New Delhi, India
| | - S Swaminathan
- Indian Council of Medical Research, New Delhi, India
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Swaminathan S, Schellenberg EG, Khalil S. Revisiting the association between music lessons and intelligence: Training effects or music aptitude? Intelligence 2017. [DOI: 10.1016/j.intell.2017.03.005] [Citation(s) in RCA: 25] [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: 02/08/2023]
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Adinarayanan S, Culp RK, Subramani R, Abbas KM, Radhakrishna S, Swaminathan S. Role of bacille Calmette-Guérin in preventing tuberculous infection. Int J Tuberc Lung Dis 2017; 21:420-424. [PMID: 28284257 PMCID: PMC5451115 DOI: 10.5588/ijtld.16.0833] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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: 11/10/2022] Open
Abstract
SETTING Rural community in South India. OBJECTIVE To determine the role of bacille Calmette-Guérin (BCG) in preventing tuberculous infection in children. DESIGN A prevalence survey was undertaken in 1999-2001 in a representative rural population in Tiruvallur District in South India using cluster sampling. Tuberculin testing was performed among all children aged <15 years, and all adults aged 15 years were questioned about chest symptoms and underwent radiography, followed by sputum examinations, if indicated. RESULTS In children living in households with a tuberculosis case, the proportion with evidence of tuberculous infection was 35.5% of 200 in the absence of a BCG scar and 27.0% of 100 in its presence, a reduction of 24% (P = 0.14). In very young children (age <5 years), the corresponding proportions were 29.1% of 55 and 11.9% of 42, a reduction of 59%; the difference was statistically significant (P = 0.048). CONCLUSION There is a possible role for BCG in preventing tuberculous infection in very young children.
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Affiliation(s)
- S Adinarayanan
- National Institute for Research in Tuberculosis, Chennai, India
| | - R K Culp
- Virginia Tech, Blacksburg, Virginia, USA
| | - R Subramani
- National Institute for Research in Tuberculosis, Chennai, India
| | - K M Abbas
- Virginia Tech, Blacksburg, Virginia, USA
| | - S Radhakrishna
- Institute for Research in Medical Statistics, Madras Chapter, Chennai, India
| | - S Swaminathan
- National Institute for Research in Tuberculosis, Chennai, India
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Nair D, Velayutham B, Kannan T, Tripathy JP, Harries AD, Natrajan M, Swaminathan S. Predictors of unfavourable treatment outcome in patients with multidrug-resistant tuberculosis in India. Public Health Action 2017; 7:32-38. [PMID: 28775941 DOI: 10.5588/pha.16.0055] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [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: 07/24/2016] [Accepted: 11/13/2016] [Indexed: 11/10/2022] Open
Abstract
Setting: India has one of the highest global rates of multidrug-resistant tuberculosis (MDR-TB), which is associated with poor treatment outcomes. A better understanding of the risk factors for unfavourable outcomes is needed. Objectives: To describe 1) the demographic and clinical characteristics of MDR-TB patients registered in three states of India during 2009-2011, 2) treatment outcomes, and 3) factors associated with unfavourable outcomes. Design: A retrospective cohort study involving a record review of registered MDR-TB patients. Results: Of 788 patients, 68% were male, 70% were aged 15-44 years, 90% had failed previous anti-tuberculosis treatment or were retreatment smear-positive, 60% had a body mass index < 18.5 kg/m2 and 72% had additional resistance to streptomycin and/or ethambutol. The median time from sputum collection to the start of MDR-TB treatment was 128 days (IQR 103-173). Unfavourable outcomes occurred in 40% of the patients, mostly from death or loss to follow-up. Factors significantly associated with unfavourable outcomes included male sex, age ⩾ 45 years, being underweight and infection with the human immunodeficiency virus. Adverse drug reactions were reported in 24% of patients, with gastrointestinal disturbance, psychiatric morbidity and ototoxicity the most common. Conclusion: Long delays from sputum collection to treatment initiation using conventional methods, along with poor treatment outcomes, suggest the need to scale up rapid diagnostic tests and shorter regimens for MDR-TB.
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Affiliation(s)
- D Nair
- Department of Clinical Research, National Institute for Research in Tuberculosis, Chennai, India
| | - B Velayutham
- Department of Clinical Research, National Institute for Research in Tuberculosis, Chennai, India
| | - T Kannan
- Department of Clinical Research, National Institute for Research in Tuberculosis, Chennai, India
| | - J P Tripathy
- International Union Against Tuberculosis and Lung Disease (The Union), South-East Asia Regional Office, New Delhi, India
| | - A D Harries
- The Union, Paris, France.,London School of Hygiene & Tropical Medicine, London, UK
| | - M Natrajan
- Department of Clinical Research, National Institute for Research in Tuberculosis, Chennai, India
| | - S Swaminathan
- Indian Council of Medical Research, New Delhi, India
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Kumar SR, Pooranagangadevi N, Rajendran M, Mayer K, Flanigan T, Niaura R, Balaguru S, Venkatesan P, Swaminathan S. Physician's advice on quitting smoking in HIV and TB patients in south India: a randomised clinical trial. Public Health Action 2017; 7:39-45. [PMID: 28775942 PMCID: PMC5526492 DOI: 10.5588/pha.16.0045] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2016] [Accepted: 11/21/2016] [Indexed: 11/10/2022] Open
Abstract
Setting: National Institute for Research in Tuberculosis, Madurai, India. Objective: To determine the efficacy of physician's advice on quitting smoking compared with standard counselling in patients with tuberculosis (TB) and patients with human immunodeficiency virus (HIV) infection. Design/Methods: This was a clinical trial conducted in Madurai, south India, among 160 male patients (80 with TB and 80 with HIV), randomised and stratified by nicotine dependence (low/high according to the Fagerström scale), who received physician's advice with standard counselling or standard counselling alone for smoking cessation. Abstinence at 1 month was assessed by self-report and carbon monoxide breath analysis. Results: The patients' mean age was 39.4 years (SD 8.5). Overall, 35% of the patients had high nicotine dependence. Most patients (41%) smoked both cigarettes and bidis. In a combined analysis including both the HIV and the TB groups, quit rates were 41% of the 68 patients in the physician group and 35% of the 68 patients in the standard counselling arm. Conclusions: Physician's advice to quit smoking delivered to patients with TB or HIV is feasible and acceptable. Smoking cessation could easily be initiated in TB patients in programme settings. Future studies should assess long-term abstinence rates with a larger sample size to demonstrate the efficacy of physician's advice.
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Affiliation(s)
- S R Kumar
- Department of Clinical Research, National Institute for Research in Tuberculosis, Chennai, India
| | - N Pooranagangadevi
- Department of Clinical Research, National Institute for Research in Tuberculosis, Chennai, India
| | - M Rajendran
- Department of Clinical Research, National Institute for Research in Tuberculosis, Chennai, India
| | - K Mayer
- Department of Medicine, Fenway Institute, Boston, Massachusetts, USA
| | - T Flanigan
- Warren Alpert Medical School, Brown University, Providence, Rhode Island, USA
| | - R Niaura
- Schroeder Institute for Tobacco Research and Policy Studies, Washington, DC, USA
| | - S Balaguru
- Department of Clinical Research, National Institute for Research in Tuberculosis, Chennai, India
| | - P Venkatesan
- Department of Clinical Research, National Institute for Research in Tuberculosis, Chennai, India
| | - S Swaminathan
- Department of Clinical Research, National Institute for Research in Tuberculosis, Chennai, India
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Kumar PA, Singh G, Joseph JB, Swaminathan S, Venkatakrishnan L. Pancreatic Tuberculosis: A Puzzle for Physicians. A Rare Case and Review of Literature. J Clin Diagn Res 2016; 10:PD29-PD31. [PMID: 28050442 DOI: 10.7860/jcdr/2016/22995.8896] [Citation(s) in RCA: 2] [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: 07/22/2016] [Accepted: 09/14/2016] [Indexed: 11/24/2022]
Abstract
Pancreatic Tuberculosis is an uncommon form of extra pulmonary tuberculosis that resembles malignancy of pancreas and serve as a diagnostic challenge for physicians. Conservative management with Anti Tuberculosis Therapy (ATT) will suffice for pancreatic tuberculosis whereas a malignancy may require major surgeries which may lead to significant morbidity. Here, we discuss the case of a female patient who presented with abdominal pain and vomiting and is a known case of chronic calcific pancreatitis. Radiological findings were that of malignancy of the pancreas. Enteroscopy showed pus flowing out from the duodenum. Endoscopic Ultrasound (EUS) guided Fine Needle Aspiration Cytology (FNAC) of the pancreas revealed acid fast bacilli. The patient was treated successfully with ATT. Timely diagnosis of this rare form of extra pulmonary tuberculosis can thus help avoid unwanted resections done for presumed malignancy, for which a high index of suspicion is needed.
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Affiliation(s)
| | - Gursharan Singh
- HOD, Department of Liver Transplant Surgery, PSG Institute of Medical Sciences and Research , Coimbatore, Tamil Nadu, India
| | - John Biku Joseph
- Consultant, Department of Liver Transplant Surgery, PSG Institute of Medical Sciences and Research , Coimbatore, Tamil Nadu, India
| | - S Swaminathan
- Consultant, Department of Liver Transplant Surgery, PSG Institute of Medical Sciences and Research , Coimbatore, Tamil Nadu, India
| | - L Venkatakrishnan
- HOD, Department of Gasteroenterology, PSG Institute of Medical Sciences and Research , Coimbatore, Tamil Nadu, India
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Abstract
The development of a general approach for the biochemical functionalization of peptide nanotubes (PNTs) could open up existing opportunities in both fundamental studies as well as a variety of applications. PNTs are spontaneously assembled organic nanostructures made from peptides. Phage display has emerged as a powerful approach for identifying selective peptide binding motifs. Here, we demonstrate for the first time the biochemical functionalization of PNTs via peptides identified from a phage display peptide library. The phage-displayed peptides are shown to recognize PNTs. These advances further allow for the development of bifunctional peptides for the capture of bacteria and the self-assembly of silver particles onto PNTs. We anticipate that these results could provide significant opportunities for using PNTs in both fundamental studies and practical applications, including sensors and biosensors nanoelectronics, energy storage devices, drug delivery, and tissue engineering.
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Affiliation(s)
- Swathi Swaminathan
- Department of Biological Engineering, Utah State University, Logan, UT 84322, USA
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Ramesh K, Hemanth Kumar AK, Kannan T, Vijayalakshmi R, Sudha V, Manohar Nesakumar S, Bharathiraja T, Lavanya J, Swaminathan S, Ramachandran G. SLCO1B1 gene polymorphisms do not influence plasma rifampicin concentrations in a South Indian population. Int J Tuberc Lung Dis 2016; 20:1231-5. [DOI: 10.5588/ijtld.15.1007] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Abstract
With a quarter of the global burden of tuberculosis (TB) occurring in India, children in this country are at high risk of tuberculous infection and TB disease. India's Revised National Tuberculosis Control Programme provides free diagnosis and treatment for children with TB using quality assured, weight-based individual drug boxes. Guidelines have recently been revised, updating both the diagnostic algorithm and shifting to a daily regimen with World Health Organization recommended dosages using child-friendly, fixed-dose combination pills. Active case finding is practised in households of TB patients as well as among human immunodeficiency virus infected and malnourished children. More attention needs to be paid to the provision of preventive therapy for household contacts aged <6 years as well as to the detection of multidrug-resistant TB among children. Case notification and the use of the Standards of TB Care in India are being strengthened in the private sector.
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Affiliation(s)
| | - K S Sachdeva
- Central TB Division, Ministry of Health and Family Welfare, Government of India, New Delhi, India
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