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Mridha D, Sarkar J, Majumdar A, Sarkar K, Maiti A, Acharya K, Das M, Chen H, Niazi NK, Roychowdhury T. Evaluation of iron-modified biochar on arsenic accumulation by rice: a pathway to assess human health risk from cooked rice. Environ Sci Pollut Res Int 2024; 31:23549-23567. [PMID: 38421541 DOI: 10.1007/s11356-024-32644-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Accepted: 02/21/2024] [Indexed: 03/02/2024]
Abstract
Arsenic (As) contamination of rice grain poses a serious threat to human health. Therefore, it is crucial to reduce the bioavailability of As in the soil and its accumulation in rice grains to ensure the safety of food and human health. In this study, mango (Mangifera indica) leaf-derived biochars (MBC) were synthesized and modified with iron (Fe) to produce FeMBC. In this study, 0.5 and 1% (w/w) doses of MBC and FeMBC were used. The results showed that 1% FeMBC enhanced the percentage of filled grains/panicle and biomass yield by 17 and 27%, respectively, compared to the control. The application of 0.5 and 1% FeMBC significantly (p < 0.05) reduced bioavailable soil As concentration by 33 and 48%, respectively, in comparison to the control. The even higher As flux in the control group as compared to the biochar-treated groups indicates the lower As availability to biochar-treated rice plant. The concentration of As in rice grains was reduced by 6 and 31% in 1% MBC and 1% FeMBC, respectively, compared to the control. The reduction in As concentration in rice grain under 1% FeMBC was more pronounced due to reduced bioavailability of As and enhanced formation of Fe-plaque. This may restrict the entry of As through the rice plant. The concentrations of micronutrients (such as Fe, Zn, Se, and Mn) in brown rice were also improved after the application of both MBC and FeMBC in comparison to the control. This study indicates that the consumption of parboiled rice reduces the health risk associated with As compared to cooked sunned rice. It emphasizes that 1% MBC and 1% FeMBC have great potential to decrease the uptake of As in rice grains.
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Affiliation(s)
- Deepanjan Mridha
- School of Environmental Studies, Jadavpur University, Kolkata, 700032, India
| | - Jit Sarkar
- Molecular and Applied Mycology and Plant Pathology Laboratory, Centre of Advanced Study, Department of Botany, University of Calcutta, Kolkata, 700019, India
| | - Arnab Majumdar
- School of Environmental Studies, Jadavpur University, Kolkata, 700032, India
| | - Kunal Sarkar
- Department of Zoology, University of Calcutta, Kolkata, 700019, India
| | - Anupam Maiti
- Department of Chemistry, Jadavpur University, Kolkata, 700032, India
| | - Krishnendu Acharya
- Molecular and Applied Mycology and Plant Pathology Laboratory, Centre of Advanced Study, Department of Botany, University of Calcutta, Kolkata, 700019, India
| | - Madhusudan Das
- Department of Zoology, University of Calcutta, Kolkata, 700019, India
| | - Hao Chen
- School of Agriculture, Fisheries and Human Sciences, The University of Arkansas at Pine Bluff, Pine Bluff, AR, USA
| | - Nabeel Khan Niazi
- Institute of Soil and Environmental Sciences, University of Agriculture Faisalabad, Faisalabad, 38040, Pakistan
| | - Tarit Roychowdhury
- School of Environmental Studies, Jadavpur University, Kolkata, 700032, India.
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Ussia GP, Mangieri A, Cammalleri V, Sarkar K, Regazzoli D, Cozzi O, Gitto M, Francone M, Fumero A, Torracca L, Bragato RM, Civilini E, Reimers B, Colombo A. 6 Months' Follow-Up of the First-in-Man Implantation of a Novel Tricuspid Flow Optimizer. JACC Cardiovasc Interv 2024:S1936-8798(24)00526-0. [PMID: 38639687 DOI: 10.1016/j.jcin.2024.02.032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Revised: 02/14/2024] [Accepted: 02/27/2024] [Indexed: 04/20/2024]
Affiliation(s)
- Gian Paolo Ussia
- Unit of Cardiovascular Science, Fondazione Policlinico Universitario Campus Bio-Medico, Roma, Italy
| | - Antonio Mangieri
- Cardio Center, Humanitas Research Hospital, Rozzano, Milan, Italy.
| | - Valeria Cammalleri
- Unit of Cardiovascular Science, Fondazione Policlinico Universitario Campus Bio-Medico, Roma, Italy
| | - Kunal Sarkar
- Unit of Cardiovascular Science, Fondazione Policlinico Universitario Campus Bio-Medico, Roma, Italy
| | | | - Ottavia Cozzi
- Cardio Center, Humanitas Research Hospital, Rozzano, Milan, Italy
| | - Mauro Gitto
- Department of Biomedical Sciences, Humanitas University, Pieve Emanuele-Milan, Milan, Italy
| | - Marco Francone
- Cardio Center, Humanitas Research Hospital, Rozzano, Milan, Italy; Department of Biomedical Sciences, Humanitas University, Pieve Emanuele-Milan, Milan, Italy
| | - Andrea Fumero
- Cardio Center, Humanitas Research Hospital, Rozzano, Milan, Italy
| | - Lucia Torracca
- Cardio Center, Humanitas Research Hospital, Rozzano, Milan, Italy
| | - Renato M Bragato
- Cardio Center, Humanitas Research Hospital, Rozzano, Milan, Italy
| | - Efrem Civilini
- Cardio Center, Humanitas Research Hospital, Rozzano, Milan, Italy; Department of Biomedical Sciences, Humanitas University, Pieve Emanuele-Milan, Milan, Italy
| | - Bernhard Reimers
- Cardio Center, Humanitas Research Hospital, Rozzano, Milan, Italy
| | - Antonio Colombo
- Cardio Center, Humanitas Research Hospital, Rozzano, Milan, Italy; Department of Biomedical Sciences, Humanitas University, Pieve Emanuele-Milan, Milan, Italy
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Dutta K, Sarkar K, Karmakar S, Gangopadhyay B, Basu A, Bank S, De S, Das B, Das M, Chattopadhyay D. Asymmetric fabrication and in vivo evaluation of the wound healing potency of electrospun biomimetic nanofibrous scaffolds based on collagen crosslinked modified-chitosan and graphene oxide quantum dot nanocomposites. J Mater Chem B 2023; 11:9478-9495. [PMID: 37740314 DOI: 10.1039/d3tb00619k] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/24/2023]
Abstract
Asymmetric scaffolds were developed through electrospinning by utilizing biocompatible materials for effective wound healing applications. First of all, the chitosan surface was modified with decanoyl chloride and crosslinked with collagen to synthesize collagen crosslinked modified-chitosan (CG-cross-CS-g-Dc). Then, the asymmetric scaffolds were fabricated through electrospinning, where the top layer was a monoaxial nanofiber of the PCL/graphene oxide quantum dot (GOQD) nanocomposite and the bottom layer was a coaxial nanofiber having PCL in the core and the CG-cross-CS-g-Dc/GOQD nanocomposite in the shell layer. The formation of monoaxial (∼130 ± 50 nm) and coaxial (∼320 ± 40 nm) nanofibers was confirmed by transmission electron microscopy (TEM). The presence of GOQDs contributed to antioxidant and antimicrobial efficacy. These scaffolds showed substantial antibacterial activity against the common wound pathogens Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus). The scaffolds exhibited excellent cytocompatibility (MTT assay) and anti-inflammatory behaviour as analysed via the cytokine assay and biochemical analysis. The in vivo wound healing potential of the nanofibrous scaffolds was assessed with full-thickness excisional wounds in a rat model. The scaffolds accelerated the re-epithelialization as well as the collagen deposition, thereby facilitating the wound healing process in a very short span of time (10 days). Both in vitro and in vivo analyses thus provide a compelling argument for the use of these scaffolds as therapeutic biomaterials and their suitability for application in rapid wound regeneration and repair.
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Affiliation(s)
- Koushik Dutta
- Department of Polymer Science and Technology, University of Calcutta, 92 A.P.C. Road, Kolkata 700009, India.
| | - Kunal Sarkar
- Department of Zoology, University of Calcutta, 35, Ballygunge Circular Road, Kolkata 700019, India
| | - Srikanta Karmakar
- Department of Polymer Science and Technology, University of Calcutta, 92 A.P.C. Road, Kolkata 700009, India.
| | - Bhuman Gangopadhyay
- Department of Polymer Science and Technology, University of Calcutta, 92 A.P.C. Road, Kolkata 700009, India.
| | - Arijita Basu
- Department of Polymer Science and Technology, University of Calcutta, 92 A.P.C. Road, Kolkata 700009, India.
| | - Sarbashri Bank
- Department of Zoology, University of Calcutta, 35, Ballygunge Circular Road, Kolkata 700019, India
| | - Sriparna De
- Department of Allied Health Sciences, Brainware University, Kolkata, 700129, India
| | - Beauty Das
- Department of Polymer Science and Technology, University of Calcutta, 92 A.P.C. Road, Kolkata 700009, India.
| | - Madhusudan Das
- Department of Zoology, University of Calcutta, 35, Ballygunge Circular Road, Kolkata 700019, India
| | - Dipankar Chattopadhyay
- Department of Polymer Science and Technology, University of Calcutta, 92 A.P.C. Road, Kolkata 700009, India.
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Sajja LR, Sarkar K, Mannam G, Padmanabhan C, Narayan P, Kamtam DN, Balakrishna N, Kodali VKK, Mulay A, Peter S, Beri P. Five-year outcomes of off and on-pump CABG: Insights from PROMOTE Patency Trial. Asian Cardiovasc Thorac Ann 2023; 31:659-666. [PMID: 37624649 DOI: 10.1177/02184923231197642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/27/2023]
Abstract
BACKGROUND There are limited studies reporting follow-up outcome data comparing of off-pump coronary artery bypass (OPCAB) with on-pump (ONCAB) technique. The aim of the study was to report the 5-year clinical outcomes of OPCAB and ONCAB in a post hoc analysis of the PROMOTE patency trial. METHODS From March 2016 through March 2017, a total of 321 patients undergoing coronary artery bypass grafting (CABG) were randomised to either the off-pump or the on-pump technique. Data on all-cause mortality, myocardial infarction (MI), cerebrovascular accident (CVA), repeat revascularisation and need for renal replacement therapy (RRT) were recorded. The composite and each of these individual outcomes are reported at 5-year interval. RESULTS The mean follow-up period was 65.9 months (±3.39). A total of 275 (85.93%) patients followed up at the 5-year interval who underwent CABG by the off-pump (n = 158) and the on-pump (n = 162) technique. The all-cause mortality was 8.9% and 5.7% in ONCAB and OPCAB, respectively (hazard ratio [HR] = 0.62; 95% confidence interval [CI] 0.25-1.57, p = 0.31). The composite of all-cause mortality, non-fatal MI, non-fatal CVA, RRT and need for repeat revascularisation was comparable in both groups (7.1% vs. 11.9%, HR = 0.57; 95% CI 0.25-1.31, p = 0.18 in OPCAB and ONCAB, respectively). The rates of 5-year non-fatal MI (p = 0.2), non-fatal CVA (p = 0.36) and need for repeat revascularisation (p = 1) were similar in both groups. A sub-group analysis did not show any significant interaction or effect modification with either of the techniques. CONCLUSIONS The 5-year clinical outcomes of OPCAB are comparable to ONCAB in low-risk patients undergoing CABG. Off-pump coronary artery bypass had no additional benefit in any subgroup.
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Affiliation(s)
- Lokeswara Rao Sajja
- Division of Cardiothoracic Surgery, Star Hospitals, Hyderabad, India
- Division of Clinical Research in Cardiovascular Medicine/Surgery, Sajja Heart Foundation, Hyderabad, India
| | - Kunal Sarkar
- Division of Cardiothoracic Surgery, Medica Superspeciality Hospital, Kolkata, India
| | - Gopichand Mannam
- Division of Cardiothoracic Surgery, Star Hospitals, Hyderabad, India
| | | | - Pradeep Narayan
- Division of Cardiothoracic Surgery, Rabindranath Tagore International Institute of Cardiac Sciences, Kolkata, India
| | - Devanish Nh Kamtam
- Division of Clinical Research in Cardiovascular Medicine/Surgery, Sajja Heart Foundation, Hyderabad, India
| | | | | | - Anvay Mulay
- Division of Cardiothoracic Surgery, Sir H. N. Reliance Foundation Hospital and Research Centre, Mumbai, India
| | - Sanjeeth Peter
- Division of Cardiothoracic Surgery, DDMM Heart Institute, Nadiad, India
| | - Prashanthi Beri
- Division of Clinical Research in Cardiovascular Medicine/Surgery, Sajja Heart Foundation, Hyderabad, India
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Sarkar K, Bank S, Chatterjee A, Dutta K, Das A, Chakraborty S, Paul N, Sarkar J, De S, Ghosh S, Acharyya K, Chattopadhyay D, Das M. Hyaluronic acid-graphene oxide quantum dots nanoconjugate as dual purpose drug delivery and therapeutic agent in meta-inflammation. J Nanobiotechnology 2023; 21:246. [PMID: 37528408 PMCID: PMC10394801 DOI: 10.1186/s12951-023-02015-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Accepted: 07/21/2023] [Indexed: 08/03/2023] Open
Abstract
Type 2 diabetes mellitus (T2DM) predominantly considered a metabolic disease is now being considered an inflammatory disease as well due to the involvement of meta-inflammation. Obesity-induced adipose tissue inflammation (ATI) is one of the earliest phenomena in the case of meta-inflammation, leading to the advent of insulin resistance (IR) and T2DM. The key events of ATI are orchestrated by macrophages, which aggravate the inflammatory state in the tissue upon activation, ultimately leading to systemic chronic low-grade inflammation and Non-Alcoholic Steatohepatitis (NASH) through the involvement of proinflammatory cytokines. The CD44 receptor on macrophages is overexpressed in ATI, NASH, and IR. Therefore, we developed a CD44 targeted Hyaluronic Acid functionalized Graphene Oxide Quantum Dots (GOQD-HA) nanocomposite for tissue-specific delivery of metformin. Metformin-loaded GOQD-HA (GOQD-HA-Met) successfully downregulated the expression of proinflammatory cytokines and restored antioxidant status at lower doses than free metformin in both palmitic acid-induced RAW264.7 cells and diet induced obese mice. Our study revealed that the GOQD-HA nanocarrier enhanced the efficacy of Metformin primarily by acting as a therapeutic agent apart from being a drug delivery platform. The therapeutic properties of GOQD-HA stem from both HA and GOQD having anti-inflammatory and antioxidant properties respectively. This study unravels the function of GOQD-HA as a targeted drug delivery option for metformin in meta-inflammation where the nanocarrier itself acts as a therapeutic agent.
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Affiliation(s)
- Kunal Sarkar
- Department of Zoology, University of Calcutta, 35 Ballygunge Circular Road, Kolkata, 700019, India
| | - Sarbashri Bank
- Department of Zoology, University of Calcutta, 35 Ballygunge Circular Road, Kolkata, 700019, India
| | - Arindam Chatterjee
- Department of Zoology, University of Calcutta, 35 Ballygunge Circular Road, Kolkata, 700019, India
| | - Koushik Dutta
- Department of Polymer Science and Technology, University of Calcutta, 92 A.P.C. Road, Kolkata, 700009, India
| | - Anwesha Das
- Department of Zoology, University of Calcutta, 35 Ballygunge Circular Road, Kolkata, 700019, India
| | - Santanu Chakraborty
- Department of Zoology, University of Calcutta, 35 Ballygunge Circular Road, Kolkata, 700019, India
| | - Nirvika Paul
- Department of Zoology, University of Calcutta, 35 Ballygunge Circular Road, Kolkata, 700019, India
| | - Jit Sarkar
- Molecular and Applied Mycology and Plant Pathology Laboratory, Department of Botany, University of Calcutta, Kolkata, 700019, India
| | - Sriparna De
- Department of Allied Health Sciences, Brainware University, Kolkata, 700129, India
| | - Sudakshina Ghosh
- Department of Zoology, Vidyasagar College for Women, Kolkata, 700006, India
| | - Krishnendu Acharyya
- Molecular and Applied Mycology and Plant Pathology Laboratory, Department of Botany, University of Calcutta, Kolkata, 700019, India
| | - Dipankar Chattopadhyay
- Department of Polymer Science and Technology, University of Calcutta, 92 A.P.C. Road, Kolkata, 700009, India
| | - Madhusudan Das
- Department of Zoology, University of Calcutta, 35 Ballygunge Circular Road, Kolkata, 700019, India.
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Das A, Bank S, Chatterjee S, Paul N, Sarkar K, Chatterjee A, Chakraborty S, Banerjee C, Majumdar A, Das M, Ghosh S. Bifenthrin disrupts cytochrome c oxidase activity and reduces mitochondrial DNA copy number through oxidative damage in pool barb (Puntius sophore). Chemosphere 2023; 332:138848. [PMID: 37156291 DOI: 10.1016/j.chemosphere.2023.138848] [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] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Revised: 04/19/2023] [Accepted: 05/02/2023] [Indexed: 05/10/2023]
Abstract
Bifenthrin (BF), a synthetic pyrethroid is used worldwide for both agricultural and non-agricultural purposes due to its high insecticidal activity and low toxicity in mammals. However, its improper usage implies a possible risk to aquatic life. The Study was aimed to correlate the association of BF toxicity with mitochondrial DNA copy number variation in edible fish Punitus sophore. The 96-h LC 50 of BF in P. sophore was 3.4 μg/L, fish was treated with sub-lethal doses (0.34 μg/L,0.68 μg/L) of BF for 15 days. The activity and expression level of cytochrome c oxidase (Mt-COI) were measured to assess mitochondrial dysfunction caused by BF. Results showed BF reduced the level of Mt-COI mRNA in treated groups, hindered complex IV activity and increased ROS generation leading to oxidative damage. mtDNAcn was decreased in the muscle, brain and liver after BF treatment. Furthermore, BF induced neurotoxicity in brain and muscle cells through the inhibition of AchE activity. The treated groups showed elevated level of malondialdehyde (MDA) and an imbalance of antioxidant enzymes activity. Molecular docking and simulation analysis also predicted that BF binds to the active sites of the enzyme and restricts the fluctuation of active sites' residues. Hence, outcome of the study suggests reduction of mtDNAcn could be a potential biomarker to assess Bifenthrin induced toxicity in aquatic ecosystem.
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Affiliation(s)
- Anwesha Das
- Department of Zoology, Ballygunge Science College, University of Calcutta, Kolkata, 700019, West Bengal, India.
| | - Sarbashri Bank
- Department of Zoology, Ballygunge Science College, University of Calcutta, Kolkata, 700019, West Bengal, India.
| | - Srilagna Chatterjee
- Department of Zoology, Ballygunge Science College, University of Calcutta, Kolkata, 700019, West Bengal, India.
| | - Nirvika Paul
- Department of Zoology, Ballygunge Science College, University of Calcutta, Kolkata, 700019, West Bengal, India.
| | - Kunal Sarkar
- Department of Zoology, Ballygunge Science College, University of Calcutta, Kolkata, 700019, West Bengal, India.
| | - Arindam Chatterjee
- Department of Zoology, Ballygunge Science College, University of Calcutta, Kolkata, 700019, West Bengal, India.
| | - Santanu Chakraborty
- Department of Zoology, Ballygunge Science College, University of Calcutta, Kolkata, 700019, West Bengal, India.
| | - Chaitali Banerjee
- Department of Zoology, Vidyasagar College for Women, Kolkata, 700006, West Bengal, India.
| | - Anasuya Majumdar
- Department of Zoology, Vidyasagar College for Women, Kolkata, 700006, West Bengal, India.
| | - Madhusudan Das
- Department of Zoology, Ballygunge Science College, University of Calcutta, Kolkata, 700019, West Bengal, India.
| | - Sudakshina Ghosh
- Department of Zoology, Vidyasagar College for Women, Kolkata, 700006, West Bengal, India.
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Sarkar K, Dutta K, Chatterjee A, Sarkar J, Das D, Prasad A, Chattopadhyay D, Acharya K, Das M, Verma SK, De S. Nanotherapeutic potential of antibacterial folic acid-functionalized nanoceria for wound-healing applications. Nanomedicine (Lond) 2023; 18:109-123. [PMID: 36853798 DOI: 10.2217/nnm-2022-0233] [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: 03/01/2023] Open
Abstract
Aim: The functionalization and characterization of antibacterial nanoceria with folic acid (FA) and elucidation of their in vivo wound healing application. Materials & methods: Functionalization of nanoceria were done with FA using a chemical method and their antibacterial activity, cellular biocompatibility and in vivo wound healing application were evaluated. Results: The functionalization of nanoceria with FA was done with 10 to 20 nm size and -20.1 mV zeta potential. The nanoformulation showed a bacteriostatic effect along with biocompatibility to different cell lines; 0.1% w/v spray of FA-nanoceria demonstrated excellent wound healing capacity within 14 days in a Wister rat model. Conclusion: The antioxidant and reactive oxygen species scavenging activity of the FA-nanoceria make it a promising therapeutic agent as a unique spray formulation in wound healing applications.
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Affiliation(s)
- Kunal Sarkar
- Department of Zoology, University of Calcutta, 35, Ballygunge Circular Road, Kolkata, West Bengal, 700019, India
| | - Kaushik Dutta
- Department of Polymer Science & Technology, University of Calcutta, 92 A.P.C. Road, Kolkata, 700009, India
| | - Arindam Chatterjee
- Department of Zoology, University of Calcutta, 35, Ballygunge Circular Road, Kolkata, West Bengal, 700019, India
| | - Jit Sarkar
- Department of Botany, Molecular & Applied Mycology & Plant Pathology Laboratory, University of Calcutta, Kolkata, West Bengal, 700019, India
| | - Dipankar Das
- Department of Allied Health Sciences, Brainware University, 398, Ramkrishnapur Road, Kolkata, West Bengal, 700125, India
| | - Arbind Prasad
- Department of Mechanical Engineering, Katihar Engineering College (Under Department of Science & Technology, Government of Bihar), Katihar, Bihar, 854109, India
| | - Dipankar Chattopadhyay
- Department of Polymer Science & Technology, University of Calcutta, 92 A.P.C. Road, Kolkata, 700009, India
| | - Krishnendu Acharya
- Department of Botany, Molecular & Applied Mycology & Plant Pathology Laboratory, University of Calcutta, Kolkata, West Bengal, 700019, India
| | - Madhusudan Das
- Department of Zoology, University of Calcutta, 35, Ballygunge Circular Road, Kolkata, West Bengal, 700019, India
| | - Suresh K Verma
- School of Biotechnology, KIIT-DU, Bhubaneswar, Odisha, 751024, India
| | - Sriparna De
- Department of Allied Health Sciences, Brainware University, 398, Ramkrishnapur Road, Kolkata, West Bengal, 700125, India
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Chakraborty A, Majumdar HS, Das W, Chatterjee D, Sarkar K. Discontinuation of ECMO-a review with a note on Indian scenario. Indian J Thorac Cardiovasc Surg 2023; 39:1-9. [PMID: 36778721 PMCID: PMC9898693 DOI: 10.1007/s12055-022-01453-9] [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: 06/19/2022] [Revised: 11/28/2022] [Accepted: 12/02/2022] [Indexed: 02/05/2023] Open
Abstract
Extracorporeal membrane oxygenation (ECMO) has strikingly progressed over the last 20 years in the management of adult and pediatric severe respiratory and cardiac dysfunctions refractory to conventional management. In this review, we will discuss the weaning strategies of veno-venous and veno-arterial ECMO including the bridge to recovery and bridge to transplant along with post-ECMO care. We will also discuss the futility and the management of bridge to nowhere from Indian perspectives.
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Affiliation(s)
- Arpan Chakraborty
- Cardiac Anesthesia, Critical Care and ECMO Services, Medica Superspecialty Hospital, Kolkata, India
| | - Hirak Subhra Majumdar
- Cardiac Anesthesia, Critical Care and ECMO Services, Medica Superspecialty Hospital, Kolkata, India
| | - Writuparna Das
- Cardiac Anesthesia, Critical Care and ECMO Services, Medica Superspecialty Hospital, Kolkata, India
| | - Dipanjan Chatterjee
- Cardiac Anesthesia, Critical Care and ECMO Services, Medica Superspecialty Hospital, Kolkata, India
| | - Kunal Sarkar
- Department of Cardiac Surgery, Medica Superspecialty Hospital, Kolkata, India
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Chatterjee A, Sarkar K, Bank S, Ghosh S, Kumar Pal D, Saraf S, Wakle D, Roy B, Chakraborty S, Bankura B, Chattopadhyay D, Das M. Homozygous GRHPR C.494G>A mutation is deleterious that causes early onset of nephrolithiasis in West Bengal, India. Front Mol Biosci 2022; 9:1049620. [PMID: 36619171 PMCID: PMC9815608 DOI: 10.3389/fmolb.2022.1049620] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Accepted: 11/28/2022] [Indexed: 12/24/2022] Open
Abstract
Pediatric nephrolithiasis (NL) or Kidney stone disease (KSD) is an untethered topic in Asian population. In Western countries, the annual incidence of paediatric NL is around 6-10%. Here, we present data from West Bengal, India, on lower age (LA, 0-20 years) NL and its prevalence for the first time. To discover the mutations associated with KSD, twenty-four (18 + 6) rare LA-NL patients were selected for Whole Exome Sequencing (WES) and Sanger sequencing, respectively. It was found that GRHPR c. 494G>A mutation (MZ826703) is predominant in our study cohort. This specific homozygous mutation is functionally studied for the first time directly from human peripheral mononuclear cell (PBMC) samples. Using expression study with biochemical activity and computational analysis we assumed that the mutation is pathogenic with loss of function. Moreover, three genes, AGXT, HOGA1 and GRHPR with Novel variants known to cause hyperoxaluria were found frequently in the study cohort. Our study analyses the genes and variations that cause LA-NL, as well as the molecular function of the GRHPR mutation, which may serve as a clinical marker in the population of West Bengal, Eastern India.
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Affiliation(s)
| | - Kunal Sarkar
- Department of Zoology, University of Calcutta, Kolkata, India
| | - Sarbashri Bank
- Department of Zoology, University of Calcutta, Kolkata, India
| | - Sudakshina Ghosh
- Department of Zoology, Vidyasagar College for Women, Kolkata, India
| | - Dilip Kumar Pal
- Department of Urology, Institute of Post Graduate Medical Education and Research, Kolkata, India
| | - Siddharth Saraf
- Department of Urology, Institute of Post Graduate Medical Education and Research, Kolkata, India
| | - Dhansagar Wakle
- Department of Urology, Institute of Post Graduate Medical Education and Research, Kolkata, India
| | - Bidyut Roy
- Human Genetics Unit, Indian Statistical Institute, Kolkata, India
| | | | - Biswabandhu Bankura
- Department of Zoology, University of Calcutta, Kolkata, India,Medical College, Kolkata, India
| | - Debprasad Chattopadhyay
- ICMR Virus Unit, ID & BG Hospital, Kolkata, India,ICMR-National Institute of Traditional Medicine, Belgavi, India,School of Health Sciences, NSHM Knowledge Campus, Kolkata, India,*Correspondence: Madhusudan Das, ; Debprasad Chattopadhyay,
| | - Madhusudan Das
- Department of Zoology, University of Calcutta, Kolkata, India,*Correspondence: Madhusudan Das, ; Debprasad Chattopadhyay,
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Sarkar K, Das P, Ray D. POS-082 Post Renal Transplantation Diarrhea: Common Infective Causes and Prevalence Among High-risk Transplantations. Kidney Int Rep 2022. [DOI: 10.1016/j.ekir.2022.07.100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022] Open
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11
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Yadava OP, Narayan P, Padmanabhan C, Sajja LR, Sarkar K, Varma PK, Jawali V. IACTS position statement on "2021 ACC/AHA/SCAI Guideline for Coronary Artery Revascularization": section 7.1-a consensus document. Indian J Thorac Cardiovasc Surg 2022; 38:126-133. [PMID: 35221551 PMCID: PMC8857365 DOI: 10.1007/s12055-022-01329-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
American College of Cardiology (ACC), American Heart Association (AHA) and Society for Cardiovascular Angiography and Interventions (SCAI) recently released the Clinical Practice Guidelines for myocardial revascularization [1]. The guidelines were the felt need of the fraternity and this single all-encompassing document, relegating the previous six guidelines on the subject to archives, is indeed welcome. However, the downgrading of coronary artery bypass surgery for stable multivessel coronary artery disease and its bracketing with percutaneous coronary interventions has caused a lot of anguish in the surgical fraternity. This document presents the official viewpoint of the Indian Association of Cardiovascular and Thoracic Surgeons on the matter.
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Affiliation(s)
| | - Pradeep Narayan
- NH Rabindranath Tagore International Institute of Cardiac Sciences, Kolkata, India
| | | | | | | | - Praveen Kerala Varma
- Dept of Cardio-Thoracic and Vascular Surgery, Amrita Institute of Medical Sciences, Cochin, India
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Chakraborty S, Sarkar K, Chakraborty S, Ojha A, Banik A, Chatterjee A, Ghosh S, Das M. Assessment of the surface water quality improvement during pandemic lockdown in ecologically stressed Hooghly River(Ganges) Estuary, West Bengal, India. Mar Pollut Bull 2021; 171:112711. [PMID: 34303059 DOI: 10.1016/j.marpolbul.2021.112711] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Revised: 07/02/2021] [Accepted: 07/05/2021] [Indexed: 06/13/2023]
Abstract
The countrywide COVID-19 pandemic lockdown accomplished what aggressive plans could not do throughout the long-term cleaning of the Ganga River. Here, we illustrated Hooghly River surface water quality [physico-chemical parameters, biological parameters, dissolved heavy metals] improvement by analyzing eight sampling station before and during the lockdown. Because of shutdown of industrial units and individuals staying at home, a complete decrease in industrial wastes, contaminants, and self-purging of the stream improved significantly water quality by about 40% to 50%. Among dissolved heavy metals, the concentrations of Cd (50%), Pb (53%), demonstrated noteworthy variations during the lockdown. Diminishing trends were also observed for TDS (62%), and BOD (52%), with significant reduction in the total coliform (63%), faecal coliform (61%), notably. Principal component analysis and paired t-test signify the alteration of water quality. The study concludes that the aquatic ecosystem can be revived if wastewater, and anthropogenic activities are properly managed by environmental surveillance.
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Affiliation(s)
- Santanu Chakraborty
- Department of Zoology, University of Calcutta, 35 Ballygunge Circular Road, Kolkata 700 019, West Bengal, India
| | - Kunal Sarkar
- Department of Zoology, University of Calcutta, 35 Ballygunge Circular Road, Kolkata 700 019, West Bengal, India
| | - Shreya Chakraborty
- Calcutta Medical College, 88, College Street, College Square, Kolkata 700073, West Bengal, India
| | - Ananya Ojha
- Department of Statistics, Pondicherry University, Chinna Kalapet, Kalapet, Puducherry 605014, India
| | - Arjun Banik
- Department of Statistics, Pondicherry University, Chinna Kalapet, Kalapet, Puducherry 605014, India
| | - Arindam Chatterjee
- Department of Zoology, University of Calcutta, 35 Ballygunge Circular Road, Kolkata 700 019, West Bengal, India
| | - Sudakshina Ghosh
- Department of Zoology, Vidyasagar College for Women, 39, Sankar Ghosh Lane, Kolkata 700006, India
| | - Madhusudan Das
- Department of Zoology, University of Calcutta, 35 Ballygunge Circular Road, Kolkata 700 019, West Bengal, India.
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Sarkar K, Rey S, Zhang X, Sebastian R, Marti GP, Fox-Talbot K, Cardona AV, Du J, Tan YS, Liu L, Lay F, Gonzalez FJ, Harmon JW, Semenza GL. Corrigendum to: Tie2-dependent knockout of HIF-1 impairs burn wound vascularization and homing of bone marrow-derived angiogenic cells. Cardiovasc Res 2021; 117:1231. [PMID: 33515001 DOI: 10.1093/cvr/cvab020] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Parisi A, Stanaway J, Sarkar K, Crump J. The global burden of non-typhoidal salmonella invasive disease: A systematic analysis for the Global Burden of Disease Study 2017. Int J Infect Dis 2020. [DOI: 10.1016/j.ijid.2020.09.898] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Sajja LR, Sarkar K, Mannam G, Kodali VKK, Padmanabhan C, Peter S, Mulay A, Beri P. Graft patency at 3 months after off- and on-pump coronary bypass surgery: a randomized trial. Indian J Thorac Cardiovasc Surg 2020; 36:93-104. [PMID: 33061107 PMCID: PMC7525555 DOI: 10.1007/s12055-019-00869-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Revised: 08/17/2019] [Accepted: 09/01/2019] [Indexed: 11/03/2022] Open
Abstract
Purpose Coronary artery bypass grafting (CABG) is performed either with the aid of cardiopulmonary bypass (on-pump) or without cardiopulmonary bypass (off-pump). There is a scarcity of angiographic data to support the non-inferiority of off-pump technique to on-pump technique. The objective of this study is to ascertain the non-inferiority of off-pump CABG when compared to on-pump CABG in terms of angiographically assessed graft patency at 3 months. Methods A total of 320 patients with multivessel coronary artery disease were enrolled in a multicenter prospective randomized trial either to on-pump CABG (n = 162) or off-pump CABG (n = 158) between March 2016 through March 2017. Graft patency was evaluated by using either multidetector computerized tomographic angiography or conventional coronary angiography at 3 months. The major adverse cardiac and cardiovascular events (MACCE) were also analyzed at 3 months. Results The median number of grafts per patient in off-pump was 3.00 (Q1:3.00 and Q3:4.00) vs on-pump 4.00 (Q1:3.00 to Q3:4.00), and the mean number of grafts per patient was lower in the off-pump CABG at 3.45 ± 0.75 vs 3.64 ± 0.70 in the on-pump CABG (p = 0.01). There was no significant difference in mortality at 3 months between the off-pump (0.63%) and on-pump groups (1.85%) with p value of 0.62. The cumulative combined MACCE showed significant difference between off-pump group (0.63%) and on-pump group (5.55%), p = 0.01. Follow-up angiograms were done in 239 (75%) patients with 120 off-pump and 119 in the on-pump group. The analysis was also done regarding graft patency in a graded manner—when analysis of A (excellent) grafts vs B (stenosed) grafts and O (occluded) grafts were made, there was no statistically significant difference in overall graft patency at 3 months between on-pump [376 /429 grafts (87.6%)] and off-pump [366 /420 grafts (87.1%)] groups (p = 0.82). The patency rates were similar among bypass conduits (left internal thoracic artery (ITA) in off-pump (91.4%) vs on-pump (92.9%) p = 0.66, right ITA in off-pump (82.1%) vs on-pump (81.8%) p = 0.97, radial artery in off-pump (84.4%) vs on-pump (82.6%) p = 0.81; saphenous vein in off-pump (85.8%) vs on-pump (86.3%), p = 0.86 and among 3 coronary territories. Conclusions Off-pump CABG is non-inferior to on-pump CABG in terms of overall graft patency at 3 months and was associated with a fewer combined cumulative MACCE compared to on-pump CABG. Electronic supplementary material The online version of this article (10.1007/s12055-019-00869-0) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Lokeswara Rao Sajja
- Division of Cardiothoracic Surgery, STAR Hospitals, Road no. 10, Banjara Hills, Hyderabad, Telangana 500 034 India.,Division of Cardiovascular Surgical Research, Sajja Heart Foundation, Srinagar Colony, Hyderabad, 500073 India
| | - Kunal Sarkar
- Division of Cardiothoracic Surgery, Medica Superspeciality Hospital, 127-Mukundapur, EM bypass, Kolkata, 700025 India
| | - Gopichand Mannam
- Division of Cardiothoracic Surgery, STAR Hospitals, Road no. 10, Banjara Hills, Hyderabad, Telangana 500 034 India
| | - Venkata Krishna Kumar Kodali
- Division of Cardiothoracic Surgery, Krishna Institute of Medical Sciences, 1-8-31/1,Minister Road, Secunderabad, Telangana 500003 India
| | - Chandrasekar Padmanabhan
- Division of Cardiothoracic Surgery, G Kuppuswamy Naidu Memorial Hospital, Pappanaicken Palayam, Coimbatore, 641 037 India
| | - Sanjeeth Peter
- Division of Cardiothoracic Surgery, DDMM Heart Institute, Mission Road, Nadiad, Gujarat 387002 India
| | - Anvay Mulay
- Division of Cardiothoracic Surgery, Fortis Hospital, Multi-Specialty Hospital Mulund West, Mumbai, 400078 India
| | - Prashanthi Beri
- Division of Clinical Research, Sajja Heart Foundation, Srinagar Colony, Hyderabad, 500073 India
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Sarkar K, Patra S. Ischemic mitral regurgitation: the way ahead is a step back. Indian J Thorac Cardiovasc Surg 2020; 36:344-346. [PMID: 33061141 DOI: 10.1007/s12055-019-00903-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Revised: 10/18/2019] [Accepted: 11/07/2019] [Indexed: 01/12/2023] Open
Abstract
Ischemic mitral regurgitation (IMR) has a profound negative effect on survival of patients following myocardial infarction. It occurs when the closing forces are overpowered by the tethering forces as a consequence of ventricular remodeling. Surgeons sought to correct moderate and severe IMR by mitral annuloplasty. Though short-term results were encouraging, survival after 2 years were not so. Higher recurrence rates were also noted with severe mitral regurgitation (MR). Parameters defining severity of IMR were initially formulated in 2003. These were revised enabling intervention in moderate MR in 2014. With the lack of positive medium and long-term evidence, 2017 guidelines have raised the bar, discouraging intervention in moderate IMR. Current guidelines have taken a conservative stance in advocating repair only for severe MR and very symptomatic patients. Till emergence of fresh evidence surgical enthusiasm for repair of IMR has to be restrained.
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Affiliation(s)
- Kunal Sarkar
- Medica Superspecialty Hospital, Kolkata, 700099 India
| | - Soumya Patra
- Medica Superspecialty Hospital, Kolkata, 700099 India
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Sajja LR, Sarkar K, Mannam G, Kodali VKK, Padmanabhan C, Peter S, Mulay A, Sardar S, Beri P. One-year outcomes of off- and on-pump coronary artery bypass grafting: PROMOTE patency trial. Indian J Thorac Cardiovasc Surg 2020; 36:469-475. [PMID: 33061158 PMCID: PMC7525622 DOI: 10.1007/s12055-020-00940-1] [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: 11/21/2019] [Revised: 02/10/2020] [Accepted: 02/12/2020] [Indexed: 11/30/2022] Open
Abstract
PURPOSE Earlier we reported 3-month graft patency and clinical outcomes of prospective randomized comparison of off-pump and on-pump multivessel coronary artery bypass surgery to evaluate outcomes and graft patency (PROMOTE patency) trial. We now report major adverse cardiac and cerebrovascular events (MACCE) at 1 year of patients who underwent coronary artery bypass grafting (CABG) using either off-pump technique or on-pump technique. METHODS The PROMOTE patency trial is a two-arm, prospective, randomized, multicentre trial, and enrolled 320 patients with multivessel coronary artery disease from March 2016 through March 2017 at 6 centres and were randomly assigned to undergo either off-pump CABG (OPCAB) (n = 158 patients) or on-pump CABG (n = 162 patients). The outcomes at 1 year were assessed. RESULTS One mortality (0.64%) occurred in off-pump group (at 30 days) and 4 (2.48%) in on-pump group (1 at 30 days, 2 at 3 months, and 1 at 1 year) (p = 0.37). There was no difference between off-pump and on-pump groups in the outcomes of nonfatal myocardial infarction (1 in off-pump and 2 in on-pump group, p = 1.00) and cerebrovascular accident (none in off-pump and 2 in on-pump group, p = 0.49). Repeat revascularization was done in one patient in each group (p = 1.00). CONCLUSION There was no significant difference in the incidence of MACCE between off-pump and on-pump CABG group at 1 year.
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Affiliation(s)
- Lokeswara Rao Sajja
- Division of Cardiothoracic Surgery, Star Hospitals, Road no. 10, Banjara Hills, Hyderabad, AP 500 034 India
- Division of Cardiothoracic Surgery, Sajja Heart Foundation, Srinagar Colony, Hyderabad, 500 073 India
| | - Kunal Sarkar
- Division of Cardiothoracic Surgery, Medica Superspeciality Hospital, 127-Mukundapur, EM Bypass, Kolkata, 700025 India
| | - Gopichand Mannam
- Division of Cardiothoracic Surgery, Star Hospitals, Road no. 10, Banjara Hills, Hyderabad, AP 500 034 India
| | - Venkata Krishna Kumar Kodali
- Division of Cardiothoracic Surgery, Krishna Institute of Medical Sciences, 1-8-31/1, Minister Road, Secunderabad, Telangana 500003 India
| | - Chandrasekar Padmanabhan
- Division of Cardiothoracic Surgery, G Kuppuswamy Naidu Memorial Hospital, Pappanaickenpalayam, Coimbatore, 641 037 India
| | - Sanjeeth Peter
- Division of Cardiothoracic Surgery, DDMM Heart Institute, Mission Road, Nadiad, Gujarat 387 002 India
| | - Anvay Mulay
- Division of Cardiothoracic Surgery, Fortis Hospital, Multi-Specialty Hospital Mulund West, Mumbai, 400 078 India
| | - Sandip Sardar
- Division of Cardiothoracic Surgery, Medica Superspeciality Hospital, 127-Mukundapur, EM Bypass, Kolkata, 700025 India
| | - Prashanthi Beri
- Division of Clinical Research, Sajja Heart Foundation, Srinagar Colony, Hyderabad, 500 073 India
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Sarkar K, Devi P, Kim KH, Kumar P. III-V nanowire-based ultraviolet to terahertz photodetectors: Device strategies, recent developments, and future possibilities. Trends Analyt Chem 2020. [DOI: 10.1016/j.trac.2020.115989] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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Roy K, Ghosh D, Sarkar K, Devi P, Kumar P. Chlorophyll( a)/Carbon Quantum Dot Bio-Nanocomposite Activated Nano-Structured Silicon as an Efficient Photocathode for Photoelectrochemical Water Splitting. ACS Appl Mater Interfaces 2020; 12:37218-37226. [PMID: 32814382 DOI: 10.1021/acsami.0c10279] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Solar-driven water splitting is considered as a futuristic sustainable way to generate hydrogen and chemical storage of solar energy. Further, considering the technological competence, silicon is one of the potential materials for developing large-scale and cost-effective photocathodes (PCs), but it lacks efficacy and stability. Here, we show that chlorophyll(a)/carbon quantum dots (Chl/CQDs) bio-nanocomposite (b-NC)-decorated Si-nanowires (SiNWs) as PC can surpass the reported efficiency for photoelectrochemical (PEC) hydrogen generation along with stability. The optimized heterojunction (Chl/CQDs_SiNW) significantly enhances broad-band solar absorption and protects Si surface from corrosion. Further, the appropriate band alignment enforces efficient photogenerated charge separation and possesses directional exciton transport property via the Förster resonance energy transfer (FRET) mechanism. This synergic effect demonstrates an ∼18 times increase in photocurrent density (26.36 mA/cm2) compared to pristine SiNW PC at 1.07 V vs reversible hydrogen electrode (RHE). The efficiency reaches ∼7.86%, which is comparably the highest reported for hybrid Si-based photocathodes. Hydrogen evaluation rate was measured to be ∼113 μmol/h at 0.8 V vs RHE under 1 sun illumination. With Si-process line compatibility, this new finding opens a new direction toward the development of Si-based efficient and stable PCs at a large scale for commercial applications.
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Affiliation(s)
- Krishnendu Roy
- School of Materials Science, Indian Association for the Cultivation of Science, Kolkata 700032, India
| | - Dibyendu Ghosh
- School of Materials Science, Indian Association for the Cultivation of Science, Kolkata 700032, India
| | - K Sarkar
- School of Materials Science, Indian Association for the Cultivation of Science, Kolkata 700032, India
| | - Pooja Devi
- Central Scientific Instruments Organization, Sector-30C, Chandigarh 160030, India
| | - Praveen Kumar
- School of Materials Science, Indian Association for the Cultivation of Science, Kolkata 700032, India
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Calafiore AM, Di Mauro M, Bonatti J, Centofanti P, Di Eusanio M, Faggian G, Fattouch K, Gaudino M, Kofidis T, Lorusso R, Menicanti L, Prapas S, Sarkar K, Stefano P, Tabata M, Zenati M, Paparella D. An observational, prospective study on surgical treatment of secondary mitral regurgitation: The SMR study. Rationale, purposes, and protocol. J Card Surg 2020; 35:2489-2494. [PMID: 32789993 DOI: 10.1111/jocs.14924] [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: 11/27/2022]
Abstract
The natural history of secondary mitral regurgitation (MR) is unfavorable. Nevertheless, there are no evidence that its correction can improve the outcome. If from one side the original cause of secondary MR can be such to limit the possibilities of improvement, from the other side it is possible that the surgical technique widely applied to repair, restrictive mitral annuloplasty, is not adequate to correct the regurgitation. The addition of valvular and/or subvalvular techniques has been considered a possible technical solution. However, we do not know the prevalence of each technique, how many times mitral replacement is used to correct secondary MR. This aspect is of particular importance, as we know that a successful mitral repair causes a better left ventricular systolic remodeling than a unsuccessful repair or replacement. This study is a prospective, observational registry, conceived to understand what is done in the real world. Any surgeon will use the technique he thinks the most suitable for the patient. Every year, for 5 years, patients will have a clinical and echocardiographic follow-up, to evaluate the risk factors for a worse result (death, rehospitalization for heart failure, reoperation for MR return, moderate, or more MR return). This knowledge will give us the possibility to understand which is the technique, or the strategy, more efficient to treat this disease and the real efficacy of the surgical treatment.
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Affiliation(s)
| | - Michele Di Mauro
- Cardio-Thoracic Surgery Department, Heart & Vascular Centre, Maastricht University Medical Centre (MUMC), Maastricht, Italy
| | - Johannes Bonatti
- Department of Cardiac Surgery, Wien North Hospital, Wien, Austria
| | - Paolo Centofanti
- Department of Cardiac Surgery, Ospedale Mauriziano, Torino, Italy
| | - Marco Di Eusanio
- Department of Cardiac Surgery, Ospedali Riuniti Torrette, Ancona, Italy
| | - Giuseppe Faggian
- Department of Cardiac Surgery, Ospedale Universitario di Verona, Verona, Italy
| | - Khalil Fattouch
- Department of Cardiac Surgery, Villa Maria Eleonora, Palermo, Italy
| | - Mario Gaudino
- Department of Cardiac Surgery, Weill Cornell Medicine, New York, New York
| | - Thoedoros Kofidis
- Department of Cardiac Surgery, National University Heart Center, Singapore
| | - Roberto Lorusso
- Cardio-Thoracic Surgery Department, Heart & Vascular Centre, Maastricht University Medical Centre (MUMC), Maastricht, Italy
| | - Lorenzo Menicanti
- Department of Cardiac Surgery, IRCCS, Policlinico San Donato, San Donato Milanese, Italy
| | - Sotirios Prapas
- Department of Cardiac Surgery, Henry Dunant Hospital, Athens, Greece
| | - Kunal Sarkar
- Department of Cardiac Surgery, Medica Superspecialty Hospital, Kolkata, India
| | - Pierluigi Stefano
- Department of Cardiac Surgery, Azienda Ospedaliera Universitaria Careggi, Firenze, Italy
| | - Minoru Tabata
- Department of Cardiac Surgery, Tokyo Bay Urayasu-Ichikawa Medical Center, Tokyo, Japan
| | - Marco Zenati
- Department of Cardiac Surgery, Veterans Affairs Boston Healthcare System, Harvard Medical School, Bosto, Massachusetts
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Ghosh D, Roy K, Sarkar K, Devi P, Kumar P. Surface Plasmon-Enhanced Carbon Dot-Embellished Multifaceted Si(111) Nanoheterostructure for Photoelectrochemical Water Splitting. ACS Appl Mater Interfaces 2020; 12:28792-28800. [PMID: 32441503 DOI: 10.1021/acsami.0c05591] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Because of the excellent electronic properties, Si is a well-established semiconducting material for PV technology. However, slow kinetics and a fast corroding nature make Si inefficient for the hydrogen evolution reaction (HER) in photoelectrochemical (PEC) applications. Herein, we demonstrate a multifacet Si nanowire (SiNW) decorated with surface plasmon-enhanced carbon quantum dots (AuCQDs) as efficient, stable, economical, and scalable photocathodes (PCs) for HER. The PEC performance of SiNW_AuCQDs has more than a fourfold efficiency enhancement than the pristine SiNW, which we have attributed to the combined effect of enhanced solar absorption and efficient carrier transport. The optimized PC SiNW_AuCQDs results in the highest photocurrent ∼1.7 mA/cm2, an applied bias photon-to-current conversion efficiency of ∼0.8%, and H2 gas evolution rate of ∼182.93 μmol·h-1. Furthermore, these SiNW_AuCQDs PCs provide extraordinary stability under continuous operating conditions with 1 sun illumination (100 mW/cm2). The process-line compatible fabrication process of these PCs will open a new direction at the wafer-level designing of a heterostructure for large-scale solar-fuel conversion.
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Affiliation(s)
- Dibyendu Ghosh
- School of Materials Sciences, Indian Association for the Cultivation of Science, Kolkata 700032, India
| | - Krishnendu Roy
- School of Materials Sciences, Indian Association for the Cultivation of Science, Kolkata 700032, India
| | - K Sarkar
- School of Materials Sciences, Indian Association for the Cultivation of Science, Kolkata 700032, India
| | - Pooja Devi
- Central Scientific Instruments Organization, Sector-30C, Chandigarh 160030, India
| | - Praveen Kumar
- School of Materials Sciences, Indian Association for the Cultivation of Science, Kolkata 700032, India
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Sarkar K, Harris RA, Wells S, Harris T, Clout M, Taylor J, Culliford L, Angelini GD, Pike K, Ashton K, Narayan P, Reeves B, Hillier J, Rogers CA, Ascione R. Preoperative VolumE Replacement therapy in DIabetic patients undergoing coronary artery bypass grafting surgery: results from an open parallel group randomized Controlled Trial (VeRDiCT). Interact Cardiovasc Thorac Surg 2020; 30:54-63. [PMID: 31539025 DOI: 10.1093/icvts/ivz226] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2019] [Revised: 08/20/2019] [Accepted: 08/23/2019] [Indexed: 12/20/2022] Open
Abstract
OBJECTIVES To investigate the effect of preoperative volume replacement therapy (VRT) on renal function, health outcome and time to fitness for discharge in diabetic patients undergoing coronary artery bypass grafting (CABG). METHODS In 2 parallel randomized controlled trials, diabetic patients were allocated to preoperative VRT (1 ml/kg/h of Hartmann's solution for 12 h) or usual care. Primary outcome was time to fitness for discharge. Secondary outcomes included acute kidney injury, postoperative complications, patient-reported quality of life (QoL), hospital resource use and markers of renal, cardiac and inflammatory injury. RESULTS In total, 169 patients were randomized (84 VRT, 85 usual care; mean age 64 years; 88% male). Time to fitness for discharge was similar between groups [median 6 days; interquartile range 5.0-9.0 in both groups; hazard ratio 0.95, 95% confidence interval (CI) 0.65-1.38; P = 0.78]. Postoperative acute kidney injury was not statistically different (VRT: 27.7% vs usual care: 18.8%, odds ratio 1.72, 95% CI 0.82-3.59; P = 0.15). Estimated glomerular filtration rate (mean difference -0.92, 95% CI -4.18 to 2.25; P = 0.56), microalbumin/creatinine ratio [geometric mean ratio (GMR) 1.16, 95% CI 0.94-1.42; P = 0.16], N-acetyl-beta-d-glucosaminidase (GMR 1.08, 95% CI 0.83-1.40; P = 0.57), C-reactive protein (GMR 1.00, 95% CI 0.88-1.13; P = 0.94), troponin T (Trop-T; GMR 1.18, 95% CI 0.78-1.79; P = 0.39) and other secondary health outcomes were similar between groups. QoL improved in both groups at 3 months with no difference observed. CONCLUSIONS The use of preoperative VRT is not superior to usual care in diabetic patients undergoing CABG. CLINICAL TRIAL REGISTRATION NUMBER ISRCTN02159606.
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Affiliation(s)
- Kunal Sarkar
- Rabindranath Tagore International Institute of Cardiac Sciences (RTIICS), Kolkata, India
| | - Rosie A Harris
- Clinical Trials and Evaluation Unit, Bristol Trials Centre, University of Bristol, Bristol, UK
| | - Sian Wells
- Clinical Trials and Evaluation Unit, Bristol Trials Centre, University of Bristol, Bristol, UK
| | - Tracy Harris
- Clinical Trials and Evaluation Unit, Bristol Trials Centre, University of Bristol, Bristol, UK
| | - Madeleine Clout
- Clinical Trials and Evaluation Unit, Bristol Trials Centre, University of Bristol, Bristol, UK
| | - Jodi Taylor
- Clinical Trials and Evaluation Unit, Bristol Trials Centre, University of Bristol, Bristol, UK
| | - Lucy Culliford
- Clinical Trials and Evaluation Unit, Bristol Trials Centre, University of Bristol, Bristol, UK
| | - Gianni D Angelini
- Faculty of Health Sciences, Bristol Heart Institute, University of Bristol, Bristol, UK
| | - Katie Pike
- Clinical Trials and Evaluation Unit, Bristol Trials Centre, University of Bristol, Bristol, UK
| | - Kate Ashton
- Clinical Trials and Evaluation Unit, Bristol Trials Centre, University of Bristol, Bristol, UK
| | - Pradeep Narayan
- Rabindranath Tagore International Institute of Cardiac Sciences (RTIICS), Kolkata, India
| | - Barney Reeves
- Clinical Trials and Evaluation Unit, Bristol Trials Centre, University of Bristol, Bristol, UK
| | - James Hillier
- Faculty of Health Sciences, Bristol Heart Institute, University of Bristol, Bristol, UK
| | - Chris A Rogers
- Clinical Trials and Evaluation Unit, Bristol Trials Centre, University of Bristol, Bristol, UK
| | - Raimondo Ascione
- Faculty of Health Sciences, Bristol Heart Institute, University of Bristol, Bristol, UK
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Sen S, Bandyopadhyay A, Yadav P, Sarkar K. Biocidal and wound healing cogency of nano-copper: a combative strategy against multidrug-resistant Enterobacteria. J Infect Public Health 2020. [DOI: 10.1016/j.jiph.2020.01.070] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
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Sarkar K. Heart Team-the Indian perspective. Indian J Thorac Cardiovasc Surg 2018; 34:355-361. [PMID: 33060959 PMCID: PMC7525544 DOI: 10.1007/s12055-018-0764-6] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Revised: 10/08/2018] [Accepted: 10/17/2018] [Indexed: 11/30/2022] Open
Abstract
Purpose The European Society of Cardiology and the European Association for Cardio-Thoracic Surgery as well as the American College of Cardiology and the American Heart association have recognized the “Heart Team” as the best option for a patient centric treatment strategy and has granted a class I recommendation for its formation. The aim of this review is to discuss the evolution, scope and composition, the benefits, and problems inherent in its implementation in the Indian scenario. Methods A review of articles on Heart Team from cardiac surgery as well as multidisciplinary meetings from other specialties was performed. Advantages of Heart Team formation and its implementation have been critically evaluated and its applicability to the Indian scenario considered in particular. Results Heart Team formation is associated with many positives. Concern remains about the implementation of Heart Team approach in its true sense. Heart Team-led decisions are definitely patient centric despite multiple challenges in resource-limited environments. Conclusions Despite the challenges, a multidisciplinary team approach in the form of Heart Team is recommended and its implementation possible in India. However, adjustments to the mechanism of implementation are required. Further research needs to focus on creating models for implementation and assessment of these models in terms of cost effectiveness, improved patient outcomes, and patient satisfaction in the process.
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Affiliation(s)
- Kunal Sarkar
- Department of Cardiac Surgery, Medica Superspecialty Hospital, Kolkata, India
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Abstract
Transcatheter aortic valve implantation (TAVI) has emerged as one of the most popularly deployed interventional innovations of recent times. After addressing the inoperable and high-risk patients, it is application is being extended to intermediate and low-risk category. There is some disquiet about the strength of evidence on which the clinical application is based. Durability and pacemaker requirement are also areas of concern. This review highlights the areas of concern on these aspects. There is also a need to address these deficiencies in future trials and also bring updated database reports in the public domain.
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Affiliation(s)
- Kunal Sarkar
- Medica Superspecialty Hospital, Kolkata, 700099 India
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Sarkar K, Reardon MJ, Little SH, Barker CM, Kleiman NS. Transcatheter Mitral Valve Replacement for Native and Failed Bioprosthetic Mitral Valves. Methodist Debakey Cardiovasc J 2018; 13:142-151. [PMID: 29743999 DOI: 10.14797/mdcj-13-3-142] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
Transcatheter mitral valve replacement (TMVR) is a novel approach for treatment of severe mitral regurgitation. A number of TMVR devices are currently undergoing feasibility trials using both transseptal and transapical routes for device delivery. Overall experience worldwide is limited to fewer than 200 cases. At present, the 30-day mortality exceeds 30% and is attributable to both patient- and device-related factors. TMVR has been successfully used to treat patients with degenerative mitral stenosis (DMS) as well as failed mitral bioprosthesis and mitral repair using transcatheter mitral valve-in-valve (TMViV)/valve-in-ring (ViR) repair. These patients are currently treated with devices designed for transcatheter aortic valve replacement. Multicenter registries have been initiated to collect outcomes data on patients currently undergoing TMViV/ViR and TMVR for DMS and have confirmed the feasibility of TMVR in these patients. However, the high periprocedural and 30-day event rates underscore the need for further improvements in device design and multicenter randomized studies to delineate the role of these technologies in patients with mitral valve disease.
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Affiliation(s)
- Kunal Sarkar
- HOUSTON METHODIST DEBAKEY HEART & VASCULAR CENTER, HOUSTON METHODIST HOSPITAL, HOUSTON, TEXAS
| | - Michael J Reardon
- HOUSTON METHODIST DEBAKEY HEART & VASCULAR CENTER, HOUSTON METHODIST HOSPITAL, HOUSTON, TEXAS
| | - Stephen H Little
- HOUSTON METHODIST DEBAKEY HEART & VASCULAR CENTER, HOUSTON METHODIST HOSPITAL, HOUSTON, TEXAS
| | - Colin M Barker
- HOUSTON METHODIST DEBAKEY HEART & VASCULAR CENTER, HOUSTON METHODIST HOSPITAL, HOUSTON, TEXAS
| | - Neal S Kleiman
- HOUSTON METHODIST DEBAKEY HEART & VASCULAR CENTER, HOUSTON METHODIST HOSPITAL, HOUSTON, TEXAS
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Ussia GP, Cammalleri V, Mehta JL, Sarkar K, Muscoli S, de Vico P, Ruvolo G, Romeo F. Transcatheter mitral valve replacement with a novel self-expandable prosthesis: single institutional experience procedural outcomes and follow-up. J Cardiovasc Med (Hagerstown) 2018; 18:415-424. [PMID: 28240641 DOI: 10.2459/jcm.0000000000000513] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
AIMS We report our experience with the CardiAQ prosthetic valve using both transapical and transseptal access. Aim of our study was proving the feasibility, safety and effectiveness of a novel transcatheter mitral valve bioprosthesis. METHODS Four patients with severe mitral regurgitation, not eligible for mitral valve surgery, were treated with the CardiAQ valve. The procedures were performed under general anaesthesia, fluoroscopic and transesophageal echocardiographic guidance. We used a transapical approach in two patients and transseptal access in the others. RESULTS Procedural success was obtained in all patients without extracorporeal circulation support. Mean procedure time was 128 min (range 90-180) and mean hospitalization duration was 12 days (range 4-24). The transseptal approach resulted in significantly shorter in-hospital stay with quick recovery. One patient died on day 35 from septicaemia and another one died after 5 months from major bleeding. The survival patients are presently in New York Heart Association I-II with improved left ventricular ejection fraction and normal quality of life. CONCLUSION CardiAQ valve placement is safe using a transapical or transseptal approach. Following valve replacement, there was a marked functional improvement in survivors. Transcatheter mitral valve replacement is a promising therapy for mitral regurgitation in a selected patient population.
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Affiliation(s)
- Gian Paolo Ussia
- aDepartment of Medicine, Università degli Studi di Roma 'Tor Vergata', Rome, Italy bDepartment of Medicine, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA cDebakey Cardiovascular Institute Houston Methodist Hospital, Houston, Texas, USA dDepartment of Surgery Università degli Studi di Roma 'Tor Vergata', Rome, Italy
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Rogers CA, Capoun R, Scott LJ, Taylor J, Jain A, Angelini GD, Narayan P, Suleiman MS, Sarkar K, Ascione R. Shortening cardioplegic arrest time in patients undergoing combined coronary and valve surgery: results from a multicentre randomized controlled trial: the SCAT trial. Eur J Cardiothorac Surg 2018; 52:288-296. [PMID: 28444178 PMCID: PMC5848808 DOI: 10.1093/ejcts/ezx087] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Accepted: 02/26/2017] [Indexed: 11/14/2022] Open
Abstract
OBJECTIVES Combined coronary artery bypass grafting and valve surgery requires a prolonged period of cardioplegic arrest (CA) predisposing to myocardial injury and postoperative cardiac-specific complications. The aim of this trial was to reduce the CA time in patients undergoing combined coronary artery bypass grafting and valve surgery and assess if this was associated with less myocardial injury and related complications. METHODS Participants were randomized to (i) coronary artery bypass grafting performed on the beating heart with cardiopulmonary bypass support followed by CA for the valve procedure (hybrid) or (ii) both procedures under CA (conventional). To assess complications related to myocardial injury, we used the composite of death, myocardial infarction, arrhythmia, need for pacing or inotropes for >12 h. To assess myocardial injury, we used serial plasma troponin T and markers of metabolic stress in myocardial biopsies. RESULTS Hundred and sixty patients (80 hybrid and 80 conventional) were randomized. Mean age was 66.5 years and 74% were male. Valve procedures included aortic (61.8%) and mitral (33.1%) alone or in combination (5.1%). CA time was 16% lower in the hybrid group [median 98 vs 89 min, geometric mean ratio (GMR) 0.84, 95% confidence interval (CI) 0.77-0.93, P = 0.0004]. Complications related to myocardial injury occurred in 131/160 patients (64/80 conventional, 67/80 hybrid), odds ratio 1.24, 95% CI 0.54-2.86, P = 0.61. Release of troponin T was similar between groups (GMR 1.04, 95% CI 0.87-1.24, P = 0.68). Adenosine monophosphate was 28% lower in the hybrid group (GMR 0.72, 95% CI 0.51-1.02, P = 0.056). CONCLUSIONS The hybrid procedure reduced the CA time but myocardial injury outcomes were not superior to conventional approach. TRIAL REGISTRATION ISRCTN65770930.
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Affiliation(s)
- Chris A Rogers
- Clinical Trials and Evaluation Unit, School of Clinical Sciences, University of Bristol, Bristol, UK
| | - Radek Capoun
- Bristol Heart Institute, School of Clinical Sciences, University of Bristol, Bristol, UK
| | - Lauren J Scott
- Clinical Trials and Evaluation Unit, School of Clinical Sciences, University of Bristol, Bristol, UK
| | - Jodi Taylor
- Clinical Trials and Evaluation Unit, School of Clinical Sciences, University of Bristol, Bristol, UK
| | - Anil Jain
- SAL Hospital and Medical Institute, Ahmedabad, India
| | - Gianni D Angelini
- Bristol Heart Institute, School of Clinical Sciences, University of Bristol, Bristol, UK
| | - Pradeep Narayan
- Rabindranath Tagore International Institute of Cardiac Sciences (RTIICS), Kolkata, India
| | - M-Saadeh Suleiman
- Bristol Heart Institute, School of Clinical Sciences, University of Bristol, Bristol, UK
| | - Kunal Sarkar
- Rabindranath Tagore International Institute of Cardiac Sciences (RTIICS), Kolkata, India
| | - Raimondo Ascione
- Bristol Heart Institute, School of Clinical Sciences, University of Bristol, Bristol, UK
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Patra S, Mukhopadhyay S, Pande A, Chakraborty R, Chakrabarti N, Sarkar K. Pseudo-Cor Triatriatum Dextrum: A Rare Manifestation of Aorto-Right Atrial Fistula Successfully Closed by Amplatzer Vascular Plug. JACC Cardiovasc Interv 2018; 11:e51-e54. [PMID: 29550090 DOI: 10.1016/j.jcin.2017.09.032] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Revised: 09/14/2017] [Accepted: 09/19/2017] [Indexed: 10/17/2022]
Affiliation(s)
- Soumya Patra
- Department of Interventional Cardiology, Medica Superspecialty Hospital, Kolkata, India.
| | - Sumanto Mukhopadhyay
- Department of Interventional Cardiology, Medica Superspecialty Hospital, Kolkata, India
| | - Arindam Pande
- Department of Interventional Cardiology, Medica Superspecialty Hospital, Kolkata, India
| | - Rabin Chakraborty
- Department of Interventional Cardiology, Medica Superspecialty Hospital, Kolkata, India
| | - Nandita Chakrabarti
- Department of Non-Invasive Cardiology, Medica Superspecialty Hospital, Kolkata, India
| | - Kunal Sarkar
- Department of Cardiothoracic Surgery, Medica Superspecialty Hospital, Kolkata, India
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Sarkar K, Palit M, Guhathakurata S, Chattopadhyay S, Banerji P. Single In x Ga 1-x As nanowire/p-Si heterojunction based nano-rectifier diode. Nanotechnology 2017; 28:385202. [PMID: 28696342 DOI: 10.1088/1361-6528/aa7f19] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Nanoscale power supply units will be indispensable for fabricating next generation smart nanoelectronic integrated circuits. Fabrication of nanoscale rectifier circuits on a Si platform is required for integrating nanoelectronic devices with on-chip power supply units. In the present study, a nanorectifier diode based on a single standalone In x Ga1-x As nanowire/p-Si (111) heterojunction fabricated by metal organic chemical vapor deposition technique has been studied. The nanoheterojunction diodes have shown good rectification and fast switching characteristics. The rectification characteristics of the nanoheterojunction have been demonstrated by different standard waveforms of sinusoidal, square, sawtooth and triangular for two different frequencies of 1 and 0.1 Hz. Reverse recovery time of around 150 ms has been observed in all wave response. A half wave rectifier circuit with a simple capacitor filter has been assembled with this nanoheterojunction diode which provides 12% output efficiency. The transport of carriers through the heterojunction is investigated. The interface states density of the nanoheterojunction has also been determined. Occurrence of output waveforms incommensurate with the input is attributed to higher series resistance of the diode which is further explained considering the dimension of p-side and n-side of the junction. The sudden change of ideality factor after 1.7 V bias is attributed to recombination through interface states in space charge region. Low interface states density as well as high rectification ratio makes this heterojunction diode a promising candidate for future nanoscale electronics.
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Affiliation(s)
- K Sarkar
- Materials Science Centre, Indian Institute of Technology, Kharagpur, 721302, India
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Narayan P, Sarkar K, Trehan N, Chandra P, Chouhan NS, Puskas JD, Taggart DP, Yadava OP. Key updates from international coronary congress 2016—a review. Indian J Thorac Cardiovasc Surg 2017. [DOI: 10.1007/s12055-017-0579-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Clout M, Harris T, Rogers C, Culliford L, Taylor J, Angelini G, Narayan P, Reeves B, Hillier J, Ashton K, Sarkar K, Ascione R. The Effects of Preoperative Volume Replacement in Diabetic Patients Undergoing Coronary Artery Bypass Grafting Surgery: Protocol for a Randomized Controlled Trial (VeRDiCT Trial). JMIR Res Protoc 2017. [PMID: 28630035 PMCID: PMC5495968 DOI: 10.2196/resprot.7386] [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] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Background Diabetes mellitus is a major risk factor for prolonged hospital stays, renal failure, and mortality in patients having coronary artery bypass grafting (CABG). Complications pose a serious threat to patients and prolong intensive care and hospital stays. Low glomerular filtration rate (GFR) due to existing renal impairment or volume depletion may exacerbate acute renal impairment/failure in these patients. Preoperative volume replacement therapy (VRT) is reported to increase the GFR and we hypothesize that VRT will reduce renal impairment and related complications in diabetic patients. Objective The objective of this study is to establish the efficacy of preoperative VRT in reducing postoperative complications in diabetic patients undergoing CABG surgery. Time to “fit for discharge”, incidence of postoperative renal failure, cardiac injury, inflammation, and other health outcomes will be investigated. Methods In this open parallel group randomized controlled trial, 170 diabetic patients undergoing elective or urgent CABG surgery received 1 mL/kg/hour of Hartmann’s solution for 12 consecutive hours prior to surgery, versus routine care. The primary outcome was time until participants were “fit for discharge”, which is defined as presence of: normal temperature, pulse, and respiration; normal oxygen saturation on air; normal bowel function; and physical mobility. Secondary outcomes included: incidence of renal failure; markers of renal function, inflammation, and cardiac damage; operative morbidity; intensive care stay; patient-assessed outcome, including the Coronary Revascularization Outcome Questionnaire; and use of hospital resources. Results Recruitment started in July 2010. Enrolment for the study was completed in July 2014. Data analysis commenced in December 2016. Study results will be submitted for publication in the summer of 2017. Conclusions VRT is a relatively easy treatment to administer in patients undergoing surgical procedures who are at risk of renal failure. This experimental protocol will increase scientific and clinical knowledge of VRT in diabetic patients undergoing elective or urgent CABG surgery. Findings supporting the efficacy of this intervention could easily be implemented in the health care system. Trial Registration International Standard Randomized Controlled Trial Number (ISRCTN): 02159606; http://www.controlled-trials.com/ISRCTN02159606 (Archived by WebCite at http://www.webcitation.org/6rDkSSkkK)
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Affiliation(s)
- Madeleine Clout
- Bristol Cardiovascular, Faculty of Health Science, University of Bristol, Bristol, United Kingdom
| | - Tracy Harris
- Bristol Cardiovascular, Faculty of Health Science, University of Bristol, Bristol, United Kingdom
| | - Chris Rogers
- Bristol Cardiovascular, Faculty of Health Science, University of Bristol, Bristol, United Kingdom
| | - Lucy Culliford
- Bristol Cardiovascular, Faculty of Health Science, University of Bristol, Bristol, United Kingdom
| | - Jodi Taylor
- Bristol Cardiovascular, Faculty of Health Science, University of Bristol, Bristol, United Kingdom
| | - Gianni Angelini
- Bristol Cardiovascular, Faculty of Health Science, University of Bristol, Bristol, United Kingdom
| | - Pradeep Narayan
- Rabindranath Tagore International Institute of Cardiac Sciences, Kolkata, India
| | - Barnaby Reeves
- Bristol Cardiovascular, Faculty of Health Science, University of Bristol, Bristol, United Kingdom
| | - James Hillier
- Bristol Cardiovascular, Faculty of Health Science, University of Bristol, Bristol, United Kingdom
| | - Kate Ashton
- Bristol Cardiovascular, Faculty of Health Science, University of Bristol, Bristol, United Kingdom
| | - Kunal Sarkar
- Rabindranath Tagore International Institute of Cardiac Sciences, Kolkata, India
| | - Raimondo Ascione
- Bristol Cardiovascular, Faculty of Health Science, University of Bristol, Bristol, United Kingdom
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Sarkar K, Mallick I, Mallath M, Dabkara D, Biswas B, Banerjee S, Ray M, Chatterjee S, Shrimali R. Role of High Dose Radiotherapy for Locally Advanced Pancreatic Cancer – a Single Centre Experience from Eastern India. Clin Oncol (R Coll Radiol) 2017. [DOI: 10.1016/j.clon.2016.10.032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Ussia GP, Cammalleri V, Marchetti AA, Sarkar K, De Vico P, Muscoli S, Sergi D, Marchei M, Ippoliti A, Romeo F. Transcatheter aortic valve implantation through distal axillary artery: novel option for vascular access. J Cardiovasc Med (Hagerstown) 2016; 16:271-8. [PMID: 25036268 DOI: 10.2459/jcm.0000000000000063] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
AIMS We describe an alternative access approach for patients undergoing transcatheter aortic valve implantation (TAVI) using surgical cut down of the distal axillary artery, in cases wherein transfemoral access is not feasible. METHODS From January 2012 to July 2013, 61 patients (59% men; mean age 81 ± 8 years) underwent TAVI at our institution. The mean logistic EuroSCORE and EuroSCORE II were 36 ± 24 and 14 ± 10, respectively. We assessed device success, 30-day safety and clinical efficacy using VARC II criteria. RESULTS TAVI was performed with the CoreValve Revalving System (CRS) (Medtronic Inc., Minneapolis, Minnesota, USA) in all cases, using transfemoral approach in 57 patients and distal trans-axillary route in four patients. A device was successfully implanted in 94%, without any major intraprocedural complications. One case of acute kidney disease, four cases of minor vascular complication and two cases of life-threatening bleeding occurred after the procedure for pericardial bleeding requiring pericardiocentesis. Permanent pacemaker was implanted in 26% of patients. There was no instance of in-hospital mortality, while two deaths (3%) occurred in the first 30 days. The total procedure time (skin-to-skin) was longer in the trans-axillary group secondary to surgical management of access site (P = 0.027), whereas revalving and fluoroscopy time were similar (P = 0.95 and P = 0.83, respectively). CONCLUSION The location and anatomical relations of the distal axillary artery make it a safer, reproducible and operator friendly access option for TAVI.
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Affiliation(s)
- Gian Paolo Ussia
- aDepartment of Cardiovascular Disease bDepartment of Vascular Surgery cDepartment of Anaesthesiology, University of Rome Tor Vergata, Rome, Italy
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Mallick I, Bhaumik S, Sarkar K, Arun P, Manikantan K, Roy P, Arun I, Dabkara D, Chatterjee S. EP-1042: Risk-factors in pT1-2N0M0 squamous cancers of the oral cavity and the role of adjuvant radiotherapy. Radiother Oncol 2016. [DOI: 10.1016/s0167-8140(16)32292-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Abstract
The advent of transcatheter aortic valve replacement (TAVR) has modified the treatment of severe aortic stenosis (AS). Large randomized trials and multicenter registries have endorsed the efficacy of TAVR in improving outcomes in patients with severe AS who are inoperable or high surgical risk. There has been a noticeable shift in using TAVR in patients with AS who are not at a high surgical risk. Appropriate diagnosis, patient selection, and referral remain cornerstones to achieving optimal outcomes after TAVR or SAVR (surgical aortic valve replacement).
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Affiliation(s)
- Kunal Sarkar
- Department of Cardiology, Policlinico Tor Vergata, University of Rome, Tor Vergata, Viale Oxford 81, Rome 00133, Italy.
| | - Mrinalini Sarkar
- Division of General Internal Medicine, Perelman School of Medicine, University of Pennsylvania, 3400 Spruce Street, Philadelphia, PA 19104, USA
| | - Gian Paolo Ussia
- Department of Cardiology, Policlinico Tor Vergata, University of Rome, Tor Vergata, Viale Oxford 81, Rome 00133, Italy
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Pilaka V, Sarkar K, Ahmed R, Mahata A, Mallick I, Shrimali R, Achari R, Chatterjee S. PO-0788: Do heart and lung distances correlate to DVH when irradiating with forward planned IMRT techniques in breast cancer? Radiother Oncol 2015. [DOI: 10.1016/s0167-8140(15)40780-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Chatterjee S, Reddy V, Sarkar K, Ahmed R, Mahata A, Mallick I, Shrimali R, Achari R. PO-0690: Answering questions for hypofractionated RT in Indian breast cancers: analysis of toxicities and outcomes. Radiother Oncol 2015. [DOI: 10.1016/s0167-8140(15)40682-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Mukherjee S, Sarkar K, Mukherjee S. Effect of Nickel and Cobalt Doping on Nano Bismuth Ferrite Prepared by the Chemical Route. ACTA ACUST UNITED AC 2015. [DOI: 10.1007/bf03401099] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Ussia GP, Sarkar K, Cammalleri V, Marchei M, Muscoli S, De Vico P, Rubino D, De Persis F, Macrini M, Romeo F. Clinical results with the 31 mm CoreValveª in large aortic annuli: the importance of implantation technique. EUROINTERVENTION 2015; 10:e1-8. [DOI: 10.4244/eijv10i9a182] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Sarkar K, Palit M, Banerji P, Chattopadhyay S, Halder NN, Biswas P, Nagabhusan B, Chowdhury S. Silver catalyzed growth of InxGa1−xAs nanowires on Si(001) by metal–organic chemical vapor deposition. CrystEngComm 2015. [DOI: 10.1039/c5ce01565k] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Sarkar K, Sarkar KJ, Banerji P. Synthesis of graphene oxide–silver nanocomposite with photochemically grown silver nanoparticles to use as a channel material in thin film field effect transistors. RSC Adv 2015. [DOI: 10.1039/c5ra23069a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The transport of charge carriers in a graphene oxide–silver nanoparticle composite is found to be controlled by nanoparticle dose.
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Affiliation(s)
- K. Sarkar
- Materials Science Centre
- Indian Institute of Technology
- Kharagpur–721302
- India
| | - Kalyan Jyoti Sarkar
- Advanced Technology and Development Centre
- Indian Institute of Technology
- Kharagpur–21302
- India
| | - P. Banerji
- Materials Science Centre
- Indian Institute of Technology
- Kharagpur–721302
- India
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Islam SM, Sarkar K, Banerji P, Sarkar KJ, Pal B. Leakage current characteristics in MOCVD grown InAs quantum dot embedded GaAs metal-oxide-semiconductor capacitor. RSC Adv 2015. [DOI: 10.1039/c5ra15642d] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Carrier transport vis-a-vis leakage current in GaAs MOS capacitors with various structures; quantum dot embedded devices show the lowest leakage.
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Affiliation(s)
- Sk Masiul Islam
- Materials Science Centre
- Indian Institute of Technology
- Kharagpur 721 302
- India
| | - K. Sarkar
- Materials Science Centre
- Indian Institute of Technology
- Kharagpur 721 302
- India
| | - P. Banerji
- Materials Science Centre
- Indian Institute of Technology
- Kharagpur 721 302
- India
| | - Kalyan Jyoti Sarkar
- Advanced Technology Development Centre
- Indian Institute of Technology
- Kharagpur 721 302
- India
| | - Biswajit Pal
- Materials Science Centre
- Indian Institute of Technology
- Kharagpur 721 302
- India
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45
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Narayan P, Bandyopadhyay M, Khan MW, Sarkar K. Angiography for Management of Perioperative Myocardial Ischemia: Does it Have Any Role? Innovations 2014. [DOI: 10.1177/155698451400900509] [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: 11/16/2022]
Affiliation(s)
- Pradeep Narayan
- NH Rabindranath Tagore International Institute of Cardiac Sciences, Kolkata, West Bengal, India
| | - Manujesh Bandyopadhyay
- NH Rabindranath Tagore International Institute of Cardiac Sciences, Kolkata, West Bengal, India
| | - Mohammed Wasim Khan
- NH Rabindranath Tagore International Institute of Cardiac Sciences, Kolkata, West Bengal, India
| | - Kunal Sarkar
- NH Rabindranath Tagore International Institute of Cardiac Sciences, Kolkata, West Bengal, India
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Sarkar K, Speciale G, Ussia GP. Core valve implant failure in the presence of mechanical mitral prosthesis: Importance of assessing left ventricular outflow tract. Catheter Cardiovasc Interv 2014; 85:920-4. [DOI: 10.1002/ccd.25376] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/09/2013] [Revised: 11/20/2013] [Accepted: 12/23/2013] [Indexed: 11/09/2022]
Affiliation(s)
- Kunal Sarkar
- Department of Cardiology; Policlinico Tor Vergata, University of Rome; Tor Vergata, Viale Oxford, 81 00133 Rome Italy
| | - Giulio Speciale
- Department of Cardiovascular Sciences; Campus Bio-Medico University of Rome; Via Alvaro del Portillo 200 00128 Rome Italy
| | - Gian Paolo Ussia
- Department of Cardiology; Policlinico Tor Vergata, University of Rome; Tor Vergata, Viale Oxford, 81 00133 Rome Italy
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47
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Ussia GP, Cammalleri V, Marchei M, Sergi D, De Vico P, Muscoli S, Sarkar K, Romeo F. Hemodynamic patterns of residual interatrial communication after transcatheter MitraClip repair. J Cardiovasc Med (Hagerstown) 2014; 15:343-9. [DOI: 10.2459/jcm.0000000000000006] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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48
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Du J, Liu L, Lay F, Wang Q, Dou C, Zhang X, Hosseini SM, Simon A, Rees DJ, Ahmed AK, Sebastian R, Sarkar K, Milner S, Marti GP, Semenza GL, Harmon JW. Combination of HIF-1α gene transfection and HIF-1-activated bone marrow-derived angiogenic cell infusion improves burn wound healing in aged mice. Gene Ther 2013; 20:1070-6. [DOI: 10.1038/gt.2013.32] [Citation(s) in RCA: 26] [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] [Received: 02/21/2013] [Revised: 05/10/2013] [Accepted: 05/15/2013] [Indexed: 01/13/2023]
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49
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Sarkar K, Sardella G, Romeo F, De Benedictis M, Tarsia G, Iadanza A, Sharma SK, Barbanti M, Tamburino C, Ussia GP. Transcatheter aortic valve implantation for severe regurgitation in native and degenerated bioprosthetic aortic valves. Catheter Cardiovasc Interv 2012; 81:864-70. [DOI: 10.1002/ccd.24479] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/22/2012] [Accepted: 05/05/2012] [Indexed: 11/09/2022]
Affiliation(s)
- Kunal Sarkar
- Division of Cardiology; Ferrarotto Hospital; University of Catania; Italy
| | - Gennaro Sardella
- Department of Cardiology Policlinico Umberto-I; Universita la Sapienza Rome; Italy
| | - Francesco Romeo
- Department of Cardiology PoliclinicoTor Vergata; Universita di Tor Vergata; Rome; Italy
| | | | | | | | - Samin. K. Sharma
- Cardiac Catheterization Laboratory Mount Sinai Hospital; New York
| | - Marco Barbanti
- Division of Cardiology; Ferrarotto Hospital; University of Catania; Italy
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50
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Sarkar K, Lewis C, Zwienenberg-Lee M, Muizelaar JP, Shahlaie K. Differences in Rotterdam and GCS Scores between Adult and Pediatric Traumatic Brain Injury (P06.254). Neurology 2012. [DOI: 10.1212/wnl.78.1_meetingabstracts.p06.254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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