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Baradwaj J, Balaji R, Kumar A, Kannan L, Nayak D. PAEDIATRIC SYMPTOMATIC SEIZURES IN INDIA: UNRAVELLING VARIED ETIOLOGIES AND NEUROIMAGING PATTERNS - A MULTICENTRIC STUDY. Georgian Med News 2024:91-97. [PMID: 38501627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 03/20/2024]
Abstract
Pediatric neuroimaging presents a unique set of challenges, primarily stemming from the intricacies of normal myelination processes occurring within the initial two years of life. This complexity is particularly pronounced in the context of pediatric epilepsy, where a substantial proportion of neuroimaging cases appears normal, especially in instances of idiopathic or provoked seizures. Nevertheless, abnormalities in neuroimaging tend to manifest in cases of acute or remote symptomatic seizures. Notably, the etiological landscape of seizures in children diverges significantly from that observed in adults, with neurodevelopmental, neurometabolic, and neuro-infectious factors emerging as predominant contributors. This multicentric study, conducted between November 2021 and November 2023, spanned diverse hospitals across various states in India. Encompassing children from birth to 12 years of age experiencing acute and remote symptomatic seizures, the study meticulously documented clinical and demographic profiles. Exclusion criteria were applied, excluding typical febrile seizures and idiopathic epilepsy syndromes to ensure a focused analysis. The study encompassed a total of 109 cases, revealing a spectrum of neuroimaging findings. Noteworthy among these were cortical malformations, including focal cortical dysplasia (12 cases), tuberous sclerosis (6 cases), polymicrogyria (3 cases), hemimegalencephaly (1 case), lissencephaly (1 case), schizencephaly (2 cases), heterotopias (3 cases), cavernous hemangioma (1 case), and AV malformation (1 case). Additionally, neoplastic lesions (6 cases), neurocysticercosis (5 cases), tuberculoma (4 cases), hippocampal sclerosis (3 cases), post-hypoxic and cerebrovascular accident gliosis (3 cases), leukodystrophies (2 cases), and non-lesional cases (58 cases) were documented. Pediatric neuroimaging in symptomatic seizures may present with normal findings, influenced by interpreter bias and the non-uniform availability of 3T MRI across different medical centers. The diverse causative factors for symptomatic seizures underscore the impact of demographic features, including the endemicity of specific infections and birth injuries, on the observed variability across medical centers. These findings underscore the imperative for a comprehensive understanding and standardization in pediatric neuroimaging practices.
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Affiliation(s)
- J Baradwaj
- 1Apollo Radiology International, Hyderabad, India
| | - R Balaji
- 2Institute of Salutogenesis & Complementary Medicine, Sri Balaji Vidyapeeth, (deemed to be university), Pondicherry India
| | - A Kumar
- 3Gleneagles Health City, Chennai, Tamilnadu, India
| | - L Kannan
- 3Gleneagles Health City, Chennai, Tamilnadu, India
| | - D Nayak
- 4Advanced Epilepsy Centre, Gleneagles Health City, Chennai, Tamilnadu, India
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2
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Godkhindi V, Mailankody S, Udupa K, Pai A, Kudva R, V G, Pai K, Mathew M, PS S, Sharma S, Singh B, Nayak D, Babu K Udupa C, HC D. 404P Adolescent & young adult cancers (AYA): Experience from a large rural teaching hospital in South India. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.10.435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022] Open
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3
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Basu T, Karpe A, Mathur Y, Patel A, Kendre P, Katna R, Raut N, Rodrigues D, Yadav R, Nayak D, Ambulkar I, Gawde S. 937P Outcome, patterns of failure and toxicity profile following adjuvant intensity modulated radiotherapy for oral cavity squamous cell carcinomas. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.08.1052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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4
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Kumar S, Nayak D, Rao R, k L, Kumar S, Kanagarajan A, v V. Epilepsy surgery at or near eloquent cortex: Challenges, approaches and outcomes. J Neurol Sci 2019. [DOI: 10.1016/j.jns.2019.10.253] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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5
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Rah B, Nayak D, Rasool R, Chakraborty S, Katoch A, Amin H, Goswami A. Reprogramming of Molecular Switching Events in UPR Driven ER Stress: Scope for Development of Anticancer Therapeutics. Curr Mol Med 2017; 16:690-701. [PMID: 27573195 DOI: 10.2174/1566524016666160829152658] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2016] [Revised: 07/19/2016] [Accepted: 08/11/2016] [Indexed: 11/22/2022]
Abstract
The incitement of unfolded protein response (UPR) during endoplasmic reticulum (ER) stress by diverse intracellular (hypoxia, nutrient deprivation, etc.) or extracellular (environmental or drug induced) stimuli is considered a major threat for perturbing cellular homeostasis leading to the aggregation of unfolded proteins inside the cell. The catastrophic UPR events emerge as a prime cellular adaptation by remodeling cancer cell signaling and restoring ER homeostasis in favor of tumor growth. The transient ER stress protects cancer cells from undergoing apoptosis, whereas the prolonged stress response further activates many cell death pathways. The present review summarizes the UPR mediated triggering of transcriptional and translational reprogramming, which will provide novel therapeutic strategies towards pro-death mechanisms rather than a cellular adaptation in tumorigenesis. Nonetheless, the current topic also points out the reprogramming of emerging molecular switching events by complex UPR-mediated signaling to trigger apoptosis. The novel agents from various natural, semi-synthetic and synthetic sources that target ER stress signaling pathway to modulate selectively the UPR phenomena with preclinical efficacy are outlined. Since major emphasis on ER stress-induced transcriptional and translational reprogramming remains to be explored, we believe that the current subject will instigate more attention from the biomedical researchers in this certain research direction.
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Affiliation(s)
| | | | | | | | | | | | - A Goswami
- Cancer Pharmacology Division, Indian Institute of Integrative Medicine (CSIR), Jammu Tawi - 180001, India.
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6
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Rasool RU, Nayak D, Chakraborty S, Faheem MM, Rah B, Mahajan P, Gopinath V, Katoch A, Iqra Z, Yousuf SK, Mukherjee D, Kumar LD, Nargotra A, Goswami A. AKT is indispensable for coordinating Par-4/JNK cross talk in p21 downmodulation during ER stress. Oncogenesis 2017; 6:e341. [PMID: 28530706 PMCID: PMC5523074 DOI: 10.1038/oncsis.2017.41] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Revised: 03/22/2017] [Accepted: 04/17/2017] [Indexed: 12/25/2022] Open
Abstract
The double-edged role of p21 to command survival and apoptosis is emerging. The current investigation highlights ER stress-mediated JNK activation that plausibly triggers cell death by attenuating endogenous p21 level. Here, we demonstrated that ER stress activator 3-AWA diminishes the p21 levels in cancer cells by averting the senescent phenotype to commence G2/M arrest. In essence, the deceleration in p21 level occurs through ER stress/JNK/Caspase-3 axis via activation/induction of proapoptotic Par-4 and inhibition of AKT. The molecular dynamics studies identified important interactions, which may be responsible for the AKT inhibition and efficacy of 3-AWA towards AKT binding pocket. Interestingly, the p21 deceleration was rescued by incubating the cells with 3-AWA in the presence of an ER stress inhibitor, Salubrinal. Furthermore, we demonstrated that p21 expression decreases solitarily in Par-4+/+ MEFs; albeit, ER stress-induced JNK activation was observed in both Par-4+/+ and Par-4−/− MEFs. Par-4 knockdown or overexpression studies established that ectopic Par-4 along with ER stress are not sufficient to downregulate p21 in PC-3 cells but are adequate for DU-145 cells and that the ER stress inflicted activation of JNK, inhibition of AKT and Par-4 induction are all crucial to p21 downmodulation by 3-AWA. By using isogenic cell lines, such as HCT-116 p53+/+ and HCT-116 p53−/−, we found that deceleration in p21 expression due to ER stress is p53 independent. Moreover, in orthotopic carcinogen-induced rat colorectal carcinoma model, we found that 3-AWA inhibits colorectal tumor growth and formation of colorectal polyps at a tolerable dose, similar to the first-line drug for colorectal cancer-5-fluorouracil.
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Affiliation(s)
- R U Rasool
- Academy of Scientific and Innovative Research (AcSIR), CSIR-Indian Institute of Integrative Medicine, Jammu, India.,Cancer Pharmacology Division, CSIR-Indian Institute of Integrative Medicine, Jammu, India
| | - D Nayak
- Academy of Scientific and Innovative Research (AcSIR), CSIR-Indian Institute of Integrative Medicine, Jammu, India.,Cancer Pharmacology Division, CSIR-Indian Institute of Integrative Medicine, Jammu, India
| | - S Chakraborty
- Academy of Scientific and Innovative Research (AcSIR), CSIR-Indian Institute of Integrative Medicine, Jammu, India.,Cancer Pharmacology Division, CSIR-Indian Institute of Integrative Medicine, Jammu, India
| | - M M Faheem
- Cancer Pharmacology Division, CSIR-Indian Institute of Integrative Medicine, Jammu, India
| | - B Rah
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center (UNMC), Omaha, NE, USA
| | - P Mahajan
- Discovery Informatics Division, CSIR-Indian Institute of Integrative Medicine, Jammu, India
| | - V Gopinath
- Cancer Biology Division, CSIR-Centre for Cellular and Molecular Biology, Hyderabad, India
| | - A Katoch
- Academy of Scientific and Innovative Research (AcSIR), CSIR-Indian Institute of Integrative Medicine, Jammu, India.,Cancer Pharmacology Division, CSIR-Indian Institute of Integrative Medicine, Jammu, India
| | - Z Iqra
- Cancer Pharmacology Division, CSIR-Indian Institute of Integrative Medicine, Jammu, India
| | - S K Yousuf
- Natural Product Chemistry Division, CSIR-Indian Institute of Integrative Medicine, Jammu, India
| | - D Mukherjee
- Natural Product Chemistry Division, CSIR-Indian Institute of Integrative Medicine, Jammu, India
| | - L D Kumar
- Cancer Biology Division, CSIR-Centre for Cellular and Molecular Biology, Hyderabad, India
| | - A Nargotra
- Discovery Informatics Division, CSIR-Indian Institute of Integrative Medicine, Jammu, India
| | - A Goswami
- Academy of Scientific and Innovative Research (AcSIR), CSIR-Indian Institute of Integrative Medicine, Jammu, India.,Cancer Pharmacology Division, CSIR-Indian Institute of Integrative Medicine, Jammu, India
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Nayak D, Walia R, Bremner R, Smith M, Mohanakumar T. Repertoire Analysis of De Novo Non-HLA Antibodies Associated with Chronic Lung Allograft Rejection Following Human Lung Transplantation. J Heart Lung Transplant 2017. [DOI: 10.1016/j.healun.2017.01.419] [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] Open
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8
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Gunasekaran M, Xu Z, Nayak D, Sharma M, Hachem R, Walia R, Bremner RM, Smith MA, Mohanakumar T. Donor-Derived Exosomes With Lung Self-Antigens in Human Lung Allograft Rejection. Am J Transplant 2017; 17:474-484. [PMID: 27278097 PMCID: PMC5340154 DOI: 10.1111/ajt.13915] [Citation(s) in RCA: 95] [Impact Index Per Article: 13.6] [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: 04/15/2016] [Revised: 06/02/2016] [Accepted: 06/04/2016] [Indexed: 01/25/2023]
Abstract
The immunological role of exosomes in allograft rejection remains unknown. We sought to determine whether exosomes are induced during lung allograft rejection and to define the antigenic compositions of HLA, lung-associated self-antigens (SAgs) and microRNAs (miRNAs). Exosomes were isolated from sera and bronchoalveolar lavage fluid from 30 lung transplant recipients (LTxRs) who were stable or who had acute rejection (AR) or bronchiolitis obliterans syndrome (BOS). Exosomes were defined by flow cytometry for CD63 and western blotting for annexin V SAgs, collagen V (Col-V) and Kα1 tubulin were examined by electron microscopy; miRNAs were profiled by a miRNA array. Donor HLA and SAgs were detected on exosomes from LTxRs with AR and BOS but not from stable LTxRs. Exosomes expressing Col-V were isolated from sera from LTxRs 3 mo before AR and 6 mo before BOS diagnosis, suggesting that exosomes with SAgs may be a noninvasive rejection biomarker. Exosomes isolated from LTxRs with AR or BOS also contained immunoregulatory miRNAs. We concluded that exosomes expressing donor HLA, SAgs and immunoregulatory miRNAs are present in the circulation and local site after human lung transplantation and play an important role in the immune pathogenesis of acute allograft rejection and BOS.
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Affiliation(s)
- M. Gunasekaran
- Norton Thoracic Institute St. Joseph’s Hospital and Medical Center Phoenix, Arizona
| | - Z. Xu
- Norton Thoracic Institute St. Joseph’s Hospital and Medical Center Phoenix, Arizona
| | - D. Nayak
- Norton Thoracic Institute St. Joseph’s Hospital and Medical Center Phoenix, Arizona
| | - M. Sharma
- Norton Thoracic Institute St. Joseph’s Hospital and Medical Center Phoenix, Arizona
| | - R. Hachem
- Division of Pulmonary and Critical Care Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - R. Walia
- Norton Thoracic Institute St. Joseph’s Hospital and Medical Center Phoenix, Arizona
| | - R. M. Bremner
- Norton Thoracic Institute St. Joseph’s Hospital and Medical Center Phoenix, Arizona
| | - M. A. Smith
- Norton Thoracic Institute St. Joseph’s Hospital and Medical Center Phoenix, Arizona
| | - T. Mohanakumar
- Norton Thoracic Institute St. Joseph’s Hospital and Medical Center Phoenix, Arizona
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Nayak D, Zhou F, Xu M, Huang J, Tsuji M, Hachem R, Mohanakumar T. Long-Term Persistence of Donor Alveolar Macrophages in Human Lung Transplant Recipients That Influences Donor-Specific Immune Responses. Am J Transplant 2016; 16:2300-11. [PMID: 27062199 PMCID: PMC5289407 DOI: 10.1111/ajt.13819] [Citation(s) in RCA: 80] [Impact Index Per Article: 10.0] [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: 03/10/2016] [Revised: 03/10/2016] [Accepted: 04/03/2016] [Indexed: 01/25/2023]
Abstract
Steady-state alveolar macrophages (AMs) are long-lived lung-resident macrophages with sentinel function. Evidence suggests that AM precursors originate during embryogenesis and populate lungs without replenishment by circulating leukocytes. However, their presence and persistence are unclear following human lung transplantation (LTx). Our goal was to examine donor AM longevity and evaluate whether AMs of recipient origin seed the transplanted lungs. Origin of AMs was accessed using donor-recipient HLA mismatches. We demonstrate that 94-100% of AMs present in bronchoalveolar lavage (BAL) were donor derived and, importantly, AMs of recipient origin were not detected. Further, analysis of BAL cells up to 3.5 years post-LTx revealed that the majority of AMs (>87%) was donor derived. Elicitation of de novo donor-specific antibody (DSA) is a major post-LTx complication and a risk factor for development of chronic rejection. The donor AMs responded to anti-HLA framework antibody (Ab) with secretion of inflammatory cytokines. Further, in an experimental murine model, we demonstrate that adoptive transfer of allogeneic AMs stimulated humoral and cellular immune responses to alloantigen and lung-associated self-antigens and led to bronchiolar obstruction. Therefore, donor-derived AMs play an essential role in the DSA-induced inflammatory cascade leading to obliterative airway disease of the transplanted lungs.
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Affiliation(s)
- D.K. Nayak
- Norton Thoracic Institute, St. Joseph’s Hospital and Medical Center, Phoenix, AZ, USA,Department of Surgery, Washington University School of Medicine, Saint Louis, MO, USA
| | - F. Zhou
- Department of Surgery, Washington University School of Medicine, Saint Louis, MO, USA
| | - M. Xu
- Department of Surgery, Washington University School of Medicine, Saint Louis, MO, USA
| | - J. Huang
- HIV and Malaria Vaccine Program, Aaron Diamond AIDS Research Center, Affiliate of the Rockefeller University, New York, NY, USA
| | - M. Tsuji
- HIV and Malaria Vaccine Program, Aaron Diamond AIDS Research Center, Affiliate of the Rockefeller University, New York, NY, USA
| | - R. Hachem
- Department of Medicine, Washington University School of Medicine, Saint Louis, MO, USA
| | - T. Mohanakumar
- Norton Thoracic Institute, St. Joseph’s Hospital and Medical Center, Phoenix, AZ, USA,Department of Surgery, Washington University School of Medicine, Saint Louis, MO, USA,Department of Pathology and Immunology, Washington University School of Medicine, Saint Louis, MO, USA
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10
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Gayen AL, Paul BK, Roy D, Kar S, Bandyopadhyay P, Basu R, Das S, Bhar DS, Manchanda RK, Khurana AK, Nayak D, Nandy P. Enhanced dielectric properties and conductivity of triturated copper and cobalt nanoparticles-doped PVDF-HFP film and their possible use in electronic industry. ACTA ACUST UNITED AC 2016. [DOI: 10.1080/14328917.2016.1196563] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- A. L. Gayen
- Department of Physics, Jadavpur University, Kolkata 700032, India
| | - B. K. Paul
- Department of Physics, Jadavpur University, Kolkata 700032, India
- Centre for Interdisciplinary Research and Education, Kolkata 700 068, India
| | - D. Roy
- Centre for Interdisciplinary Research and Education, Kolkata 700 068, India
| | - S. Kar
- Department of Physics, Jadavpur University, Kolkata 700032, India
- Centre for Interdisciplinary Research and Education, Kolkata 700 068, India
| | - P. Bandyopadhyay
- Department of Physics, Jadavpur University, Kolkata 700032, India
- Centre for Interdisciplinary Research and Education, Kolkata 700 068, India
| | - R. Basu
- Centre for Interdisciplinary Research and Education, Kolkata 700 068, India
- Department of Physics, Jogamaya Devi College, Kolkata 700026, India
| | - S. Das
- Department of Physics, Jadavpur University, Kolkata 700032, India
- Centre for Interdisciplinary Research and Education, Kolkata 700 068, India
- Department of Physics, Indian Institute of Engineering Science and Technology, Shibpur, India
| | - D. S. Bhar
- Centre for Interdisciplinary Research and Education, Kolkata 700 068, India
| | - R. K. Manchanda
- Central Council for Research in Homeopathy, New Delhi, India
| | - A. K. Khurana
- Central Council for Research in Homeopathy, New Delhi, India
| | - D. Nayak
- Central Council for Research in Homeopathy, New Delhi, India
| | - P. Nandy
- Centre for Interdisciplinary Research and Education, Kolkata 700 068, India
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Naik M, Prabhu M, Nayak D, Rajagopal K. An unusual presentation of invasive aspergillosis - Diagnostic and management dilemmas. Int J Infect Dis 2016. [DOI: 10.1016/j.ijid.2016.02.458] [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: 10/22/2022] Open
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12
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Xu Z, Ramachandran S, Gunasekaran M, Nayak D, Benshoff N, Hachem R, Gelman A, Mohanakumar T. B Cell-Activating Transcription Factor Plays a Critical Role in the Pathogenesis of Anti-Major Histocompatibility Complex-Induced Obliterative Airway Disease. Am J Transplant 2016; 16:1173-82. [PMID: 26844425 PMCID: PMC4803590 DOI: 10.1111/ajt.13595] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Revised: 10/22/2015] [Accepted: 10/24/2015] [Indexed: 01/25/2023]
Abstract
Antibodies (Abs) against major histocompatibility complex (MHC) results in T helper-17 (Th17)-mediated immunity against lung self-antigens (SAgs), K-α1 tubulin and collagen V and obliterative airway disease (OAD). Because B cell-activating transcription factor (BATF) controls Th17 and autoimmunity, we proposed that BATF may play a critical role in OAD. Anti-H2K(b) was administered intrabronchially into Batf (-/-) and C57BL/6 mice. Histopathology of the lungs on days 30 and 45 after Ab administration to Batf (-/-) mice resulted in decreased cellular infiltration, epithelial metaplasia, fibrosis, and obstruction. There was lack of Abs to SAgs, reduction of Sag-specific interleukin (IL)-17 T cells, IL-6, IL-23, IL-17, IL-1β, fibroblast growth factor-6, and CXCL12 and decreased Janus kinase 2, signal transducer and activator of transcription 3 (STAT3), and retinoid-related orphan receptor γT. Further, micro-RNA (miR)-301a, a regulator of Th17, was reduced in Batf (-/-) mice in contrast to upregulation of miR-301a and downregulation of protein inhibitor of activated STAT3 (PIAS3) in anti-MHC-induced OAD animals. We also demonstrate an increase in miR-301a in the bronchoalveolar lavage cells from lung transplant recipients with Abs to human leukocyte antigen. This was accompanied by reduction in PIAS3 mRNA. Therefore, we conclude that BATF plays a critical role in the immune responses to SAgs and pathogenesis of anti-MHC-induced rejection. Targeting BATF should be considered for preventing chronic rejection after human lung transplantation.
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Affiliation(s)
- Z. Xu
- Department of Surgery, Washington University School of Medicine, St. Louis, MO 63110
| | - S. Ramachandran
- Department of Surgery, Washington University School of Medicine, St. Louis, MO 63110
| | - M. Gunasekaran
- Department of Surgery, Washington University School of Medicine, St. Louis, MO 63110
| | - D. Nayak
- Department of Surgery, Washington University School of Medicine, St. Louis, MO 63110
| | - N. Benshoff
- Department of Surgery, Washington University School of Medicine, St. Louis, MO 63110
| | - R. Hachem
- Department of Medicine Washington University School of Medicine, St. Louis, MO 63110
| | - A. Gelman
- Department of Surgery, Washington University School of Medicine, St. Louis, MO 63110,Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110
| | - T. Mohanakumar
- Department of Surgery, Washington University School of Medicine, St. Louis, MO 63110,Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110,Correspondence to: Thalachallour Mohanakumar, PhD, Washington University School of Medicine, Department of Surgery, Box 8109-3328 CSRB, 660S Euclid Avenue, St. Louis, MO 63110, USA. Telephone: 314-362-8463. Fax: 314-747-1560.
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Nayak D, Zhou F, Mohanakumar T. Clara Cell Secretory Protein Limits Small Airway Inflammation and Fibrosis Induced by De Novo Donor Specific Antibodies. J Heart Lung Transplant 2016. [DOI: 10.1016/j.healun.2016.01.101] [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] Open
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14
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Nandy P, Paul BK, Kar S, Bandyopadhyay P, Basu R, Das S, Bhar DS, Manchanda R, Khurana A, Nayak D. Significant enhancement of dielectric and conducting properties of electroactive polymer polyvinylidene fluoride films: An innovative use of Ferrum metallicum at different concentrations. Indian J Res Homoeopathy 2016. [DOI: 10.4103/0974-7168.179154] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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15
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Xu Z, Nayak D, Yang W, Baskaran G, Ramachandran S, Sarma N, Aloush A, Trulock E, Hachem R, Patterson GA, Mohanakumar T. Dysregulated MicroRNA Expression and Chronic Lung Allograft Rejection in Recipients With Antibodies to Donor HLA. Am J Transplant 2015; 15:1933-47. [PMID: 25649290 PMCID: PMC5607954 DOI: 10.1111/ajt.13185] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2014] [Revised: 12/18/2014] [Accepted: 12/19/2014] [Indexed: 01/25/2023]
Abstract
The pathogenesis of chronic rejection, Bronchiolitis Obliterans Syndrome (BOS) following lung transplantation (LT) is poorly understood. We hypothesized that development of antibodies to HLA (DSA) is associated with dysregulation of microRNA (miRNA) that predisposes BOS. Towards this, miRNA profiling of mononuclear cells from 10 stable LT (DSA(-) BOS(-) ), 10 LT with DSA(+) BOS(-) (DSA group) and 10 LT with DSA(+) BOS(+) (BOS group) were performed. Prediction by mirPath indicated that differential miRNAs in DSA(+) BOS(-) compared to stable are significantly up-regulated (relative fold >2, p < 0.05) for TGF-β and B cell receptor signal pathways. A total of seventy-four miRNAs were up-regulated and six miRNAs were down regulated in LT with DSA(+) BOS(+) when compared to stable (relative fold >2, p < 0.05). There was also significant enrichment of cell cycle and gap junction pathways. An inverse correlation between expression of two key miRNAs and their target genes were observed: miR-369-5p and miR-548d were down regulated in DSA(+) LT while their gene targets in TGF-β signal pathways were up-regulated. In addition, miR-628-5p and miR-134 were down regulated and their target genes (B cell development) were up-regulated. Therefore, we conclude that alloimmunity induced changes in miRNAs affecting the TGF-β and B cell receptor signal pathways play important roles in BOS development.
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Affiliation(s)
- Z. Xu
- Department of Surgery, Washington University School of Medicine, St. Louis, MO
| | - D. Nayak
- Department of Surgery, Washington University School of Medicine, St. Louis, MO
| | - W. Yang
- Department of Genetics, Washington University School of Medicine, St. Louis, MO
| | - G. Baskaran
- Department of Medicine, Washington University School of Medicine, St. Louis, MO
| | - S. Ramachandran
- Department of Surgery, Washington University School of Medicine, St. Louis, MO
| | - N. Sarma
- Department of Surgery, Washington University School of Medicine, St. Louis, MO
| | - A. Aloush
- Department of Medicine, Washington University School of Medicine, St. Louis, MO
| | - E. Trulock
- Department of Medicine, Washington University School of Medicine, St. Louis, MO
| | - R. Hachem
- Department of Medicine, Washington University School of Medicine, St. Louis, MO
| | - G. A. Patterson
- Department of Surgery, Washington University School of Medicine, St. Louis, MO
| | - T. Mohanakumar
- Department of Surgery, Washington University School of Medicine, St. Louis, MO,Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO
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16
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Nayak AK, Raja R, Rao KS, Shukla AK, Mohanty S, Shahid M, Tripathi R, Panda BB, Bhattacharyya P, Kumar A, Lal B, Sethi SK, Puri C, Nayak D, Swain CK. Effect of fly ash application on soil microbial response and heavy metal accumulation in soil and rice plant. Ecotoxicol Environ Saf 2015; 114:257-262. [PMID: 24836933 DOI: 10.1016/j.ecoenv.2014.03.033] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [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: 02/11/2014] [Revised: 03/26/2014] [Accepted: 03/27/2014] [Indexed: 06/03/2023]
Abstract
Fly ash (FA), a byproduct of coal combustion in thermal power plants, has been considered as a problematic solid waste and its safe disposal is a cause of concern. Several studies proposed that FA can be used as a soil additive; however its effect on microbial response, soil enzymatic activities and heavy metal accumulation in soil and grain of rice (cv. Naveen) to fly ash (FA) application was studied in a pot experiment during dry season 2011 in an Inceptisol. Fly ash was applied at a rate of zero per cent (FS), five per cent (FA5), ten per cent (FA10), twenty per cent (FA20), 40 per cent (FA40) and 100 per cent (FA100) on soil volume basis with nitrogen (N), phosphorus (P) and potassium (K) (40:20:20mg N:P:Kkg(-1) soil) with six replications. Heavy metals contents in soil and plant parts were analysed after harvest of crop. On the other hand, microbial population and soil enzymatic activities were analysed at panicle initiation stage (PI, 65 days after transplanting) of rice. There was no significant change in the concentration of zinc (Zn), iron (Fe), copper (Cu), manganese (Mn), cadmium (Cd) and chromium (Cr) with application of fly ash up to FA10. However, at FA100 there was significant increase of all metals concentration in soil than other treatments. Microorganisms differed in their response to the rate of FA application. Population of both fungi and actinomycetes decreased with the application of fly ash, while aerobic heterotrophic bacterial population did not change significantly up to FA40. On the other hand, total microbial activity measured in terms of Fluorescein diacetate (FDA) assay, and denitrifiers showed an increased trend up to FA40. However, activities of both alkaline and acid phosphatase were decreased with the application of FA. Application of FA at lower levels (ten to twenty per cent on soil volume basis) in soil enhanced micronutrients content, microbial activities and crop yield.
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Affiliation(s)
- A K Nayak
- Central Rice Research Institute, Cuttack 753006, Odisha, India.
| | - R Raja
- Central Rice Research Institute, Cuttack 753006, Odisha, India
| | - K S Rao
- Central Rice Research Institute, Cuttack 753006, Odisha, India
| | - A K Shukla
- Central Rice Research Institute, Cuttack 753006, Odisha, India; AICRP (Micronutrients), IISS, Bhopal, India
| | - Sangita Mohanty
- Central Rice Research Institute, Cuttack 753006, Odisha, India
| | - Mohammad Shahid
- Central Rice Research Institute, Cuttack 753006, Odisha, India
| | - R Tripathi
- Central Rice Research Institute, Cuttack 753006, Odisha, India
| | - B B Panda
- Central Rice Research Institute, Cuttack 753006, Odisha, India
| | - P Bhattacharyya
- Central Rice Research Institute, Cuttack 753006, Odisha, India
| | - Anjani Kumar
- Central Rice Research Institute, Cuttack 753006, Odisha, India
| | - B Lal
- Central Rice Research Institute, Cuttack 753006, Odisha, India
| | - S K Sethi
- Central Rice Research Institute, Cuttack 753006, Odisha, India
| | - C Puri
- Central Rice Research Institute, Cuttack 753006, Odisha, India
| | - D Nayak
- Central Rice Research Institute, Cuttack 753006, Odisha, India
| | - C K Swain
- Central Rice Research Institute, Cuttack 753006, Odisha, India
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Nayak D. Influenza Virus Infections. Reference Module in Biomedical Sciences 2014. [PMCID: PMC7173425 DOI: 10.1016/b978-0-12-801238-3.00084-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
Influenza, commonly known as flu, is a contagious, febrile viral disease. Common symptoms are chills, fever, sore throat, coughing, sneezing, muscle pains, headache, myalgia, etc. Influenza viruses (IVs) belonging to orthomyxovirus group are of three types (types A, B, and C). IVs are enveloped, segmented, negative-stranded RNA viruses containing eight distinct RNA segments (types A and B) and seven RNA segments (type C). Only type A viruses exhibit different subtypes. Currently, 18 hemagglutination (HA) subtypes (H1 to H18) and 11 neuraminidase (NA) subtypes (N1 to N11) are known in humans and other warm-blooded animals. Flu outbreaks occur as annual epidemics in fall and winter and infrequently, as worldwide pandemics. Annual epidemics are caused by antigenic drift due to mutations in HA and NA antigens, whereas pandemics are caused by antigenic shift due to genetic reassortment among different subtype viruses. The first pandemic of the twenty-first century, declared by the World Health Organization (WHO) in 2009, was caused by an H1N1 virus, derived from quadruple reassortment among swine, avian, and human IVs. Currently, two types of antiinfluenza drugs, based on either blocking the M2 proton channel (amantadine and rimantadine) or inhibiting NA (oseltamivir or Tamiflu by Roche and zanamivir or Relanza by GlaxoSmithKline) are available. The virus is commonly spread by aerosol droplets and by fingertips. Therefore, washing hands and avoiding contact with infected persons are the first lines of defense. Indoor living and closeness of people in an enclosed environment in winter facilitate virus transmission leading to epidemics. Annual vaccination is the best preventative measure. Currently, two types of vaccines (subunit vaccine by injection and live attenuated vaccine by nasal spray) are available and recommended by WHO and Centers for Disease Control.
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18
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Ray B, D'Souza AS, Saxena A, Nayak D, Sushma RK, Shetty P, Pugazhendi B. Morphology of the superior gluteal nerve: a study in adult human cadavers. BRATISL MED J 2013; 114:409-12. [PMID: 23822627 DOI: 10.4149/bll_2013_087] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The superior gluteal nerve (SGN) arises from the sacral plexus and enters the gluteal region above the piriformis where it divides into superior and an inferior branches. Former ends in the gluteus medius and occasionally gluteus minimus whereas latter supplies gluteus medius and minimus and ends in tensor fascia latae. Variations, relations, branching pattern and length of the SGN were reported in earlier studies. The present study was conducted to establish preliminary data on the length and branching pattern of the SGN and its relations with the neighbouring bony landmarks. Twenty two lower extremities were examined in 22 male and 13 female formalin fixed cadavers. Tip of the greater trochanter was determined as the point of reference. Statistical analysis was done using student's T test. Present study will help orthopedicians performing total hip replacement through lateral and transgluteal approaches (Tab. 3, Fig. 4, Ref. 19).
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Affiliation(s)
- B Ray
- Department of Anatomy, Kasturba Medical College, Manipal, Karnataka
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19
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Chen Y, Tai BC, Nayak D, Kumar N, Chua KH, Lim JW, Goy RWL, Wong HK. Blood loss in spinal tumour surgery and surgery for metastatic spinal disease: a meta-analysis. Bone Joint J 2013; 95-B:683-8. [PMID: 23632682 DOI: 10.1302/0301-620x.95b5.31270] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
There is currently no consensus about the mean volume of blood lost during spinal tumour surgery and surgery for metastatic spinal disease. We conducted a systematic review of papers published in the English language between 31 January 1992 and 31 January 2012. Only papers that clearly presented blood loss data in spinal surgery for metastatic disease were included. The random effects model was used to obtain the pooled estimate of mean blood loss. We selected 18 papers, including six case series, ten retrospective reviews and two prospective studies. Altogether, there were 760 patients who had undergone spinal tumour surgery and surgery for metastatic spinal disease. The pooled estimate of peri-operative blood loss was 2180 ml (95% confidence interval 1805 to 2554) with catastrophic blood loss as high as 5000 ml, which is rare. Aside from two studies that reported large amounts of mean blood loss (> 5500 ml), the resulting funnel plot suggested an absence of publication bias. This was confirmed by Egger's test, which did not show any small-study effects (p = 0.119). However, there was strong evidence of heterogeneity between studies (I(2) = 90%; p < 0.001). Spinal surgery for metastatic disease is associated with significant blood loss and the possibility of catastrophic blood loss. There is a need to establish standardised methods of calculating and reporting this blood loss. Analysis should include assessment by area of the spine, primary pathology and nature of surgery so that the amount of blood loss can be predicted. Consideration should be given to autotransfusion in these patients.
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Affiliation(s)
- Y Chen
- National University Health System, Department of Orthopaedic Surgery, NUHS Tower Block, Level 11, 1E Kent Ridge Road, 119228, Singapore
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20
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Ray B, D'Souza AS, Kumar V, Pugazhandhi B, D'Souza MR, Nayak D, Sushma RK, Shetty P, Singh H, Krishna L, Bhat KM, Rao AC, Chakraborti S, Kumar N, Saxena A. Ovarian development in Wistar rat treated prenatally with single dose diisobutyl phthalate. ACTA ACUST UNITED AC 2013; 113:577-82. [PMID: 23094893 DOI: 10.4149/bll_2012_129] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Phthalates are a class of industrial compounds with an array of toxicological properties used in day to day life. Diisobutyl phthalate on (DIBP) is used as an additive to keep the plastics soft or flexible (plasticizer) in nitrocellulose plastic, nail polish, explosives, lacquer manufacturing etc. Although DIBP exposure in humans is generally low, people in adhesive industries and pharmaceutical industries are exposed to higher levels. The aim of this study was to determine the effect of single dose of DIBP on developing ovary of Wistar rat. One hundred and eight adult pregnant Wistar rats were divided into control and experimental groups. Rats in experimental group were given DIBP on day 10, 12 and 14 of gestation at 0.375, 0.75 and 1.25 ml/kg body weight dose intraperitoneally in a single dose. Sections of ovaries collected on day 21 of gestation were stained with hematoxylin and eosin and examined and Masson's trichrome histologically. Sections belonging to the control group showed the presence of oocytes in clusters separated by thin fibrous septa. Degeneration oocytes, empty follicles surrounded by follicular cells without gonocytes in the center were observed in ovarian stroma. Blood vessels in the ovarian stroma were prominent and congested. Around a bunch of follicles total architectural disarray was observed although on special staining fibrosis was not evident. As pregnant women are constantly exposed, effect of DIBP on ovary of a developing fetus would denote the long term consequence in future generations (Fig. 5, Ref. 39).
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Affiliation(s)
- B Ray
- Department of Anatomy, Katsturba Medical College, Manipal, Karnataka, India
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21
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Lamba CD, Chakraborty PS, Nayak D, John MD, Sarkar DB, Poddar A, Arya JS, Raju K, Vivekanand K, Singh HBK, Baig H, Prusty AK, Singh V, Nayak C. Effect of individualized homoeopathic treatment in influenza like illness: A multicenter, single blind, randomized, placebo controlled study. Indian J Res Homoeopathy 2013. [DOI: 10.4103/0974-7168.114268] [Citation(s) in RCA: 14] [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: 11/04/2022] Open
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22
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Ramaswamy B, Nayak D. Efficacy of Transnasal Endoscopic Surgery for CSF Rhinorrhea. Skull Base Surg 2012. [DOI: 10.1055/s-0032-1313999] [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: 10/28/2022]
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23
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Nayak D, Ramaswamy B. Exclusive Endoscopic/Endoscopic-Assisted Minimally Invasive Surgery for Sinonasal Neoplasm—Our Experience. Skull Base Surg 2012. [DOI: 10.1055/s-0032-1313939] [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: 10/28/2022]
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24
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Nayak D, Huo Y, Kwang WXT, Pushparaj PN, Kumar SD, Ling EA, Dheen ST. Sphingosine kinase 1 regulates the expression of proinflammatory cytokines and nitric oxide in activated microglia. Neuroscience 2009; 166:132-44. [PMID: 20036321 DOI: 10.1016/j.neuroscience.2009.12.020] [Citation(s) in RCA: 114] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2009] [Revised: 12/06/2009] [Accepted: 12/07/2009] [Indexed: 01/16/2023]
Abstract
Microglial activation has been implicated as one of the causative factors for neuroinflammation in various neurodegenerative diseases. The sphingolipid metabolic pathway plays an important role in inflammation, cell proliferation, survival, chemotaxis, and immunity in peripheral macrophages. In this study, we demonstrate that sphingosine kinase1 (SphK1), a key enzyme of the sphingolipid metabolic pathway, and its receptors are expressed in the mouse BV2 microglial cells and SphK1 alters the expression and production of proinflammatory cytokines and nitric oxide in microglia treated with lipopolysaccharide (LPS). LPS treatment increased the SphK1 mRNA and protein expression in microglia as revealed by the RT-PCR, Western blot and immunofluorescence. Suppression of SphK1 by its inhibitor, N, N Dimethylsphingosine (DMS), or siRNA resulted in decreased mRNA expression of TNF-alpha, IL-1beta, and iNOS and release of TNF-alpha and nitric oxide (NO) in LPS-activated microglia. Moreover, addition of sphingosine 1 phosphate (S1P), a breakdown product of sphingolipid metabolism, increased the expression levels of TNF-alpha, IL-1beta and iNOS and production of TNF-alpha and NO in activated microglia. Hence to summarize, suppression of SphK1 in activated microglia inhibits the production of proinflammatory cytokines and NO and the addition of exogenous S1P to activated microglia enhances their inflammatory responses. Since the chronic proinflammatory cytokine production by microglia has been implicated in neuroinflammation, modulation of SphK1 and S1P in microglia could be looked upon as a future potential therapeutic method in the control of neuroinflammation in neurodegenerative diseases.
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Affiliation(s)
- D Nayak
- Department of Anatomy, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
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25
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Eichler R, Brüchle W, Buda R, Bürger S, Dressler R, Düllmann CE, Dvorak J, Eberhardt K, Eichler B, Folden CM, Gäggeler HW, Gregorich KE, Haenssler F, Hoffman DC, Hummrich H, Jäger E, Kratz JV, Kuczewski B, Liebe D, Nayak D, Nitsche H, Piguet D, Qin Z, Rieth U, Schädel M, Schausten B, Schimpf E, Semchenkov A, Soverna S, Sudowe R, Trautmann N, Thörle P, Türler A, Wierczinski B, Wiehl N, Wilk PA, Wirth G, Yakushev AB, von Zweidorf A. Attempts to chemically investigate element 112. RADIOCHIM ACTA 2009. [DOI: 10.1524/ract.2006.94.4.181] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Summary
Two experiments aiming at the chemical investigation of element 112 produced in the heavy ion induced nuclear fusion reaction of 48Ca with 238U were performed at the Gesellschaft für Schwerionenforschung (GSI), Darmstadt, Germany. Both experiments were designed to determine the adsorption enthalpy of element 112 on a gold surface using a thermochromatography setup. The temperature range covered in the thermochromatography experiments allowed the adsorption of Hg at about 35 °C and of Rn at about -180 °C. Reports from the Flerov Laboratory for Nuclear Reactions (FLNR), Dubna, Russia claim production of a 5-min spontaneous fission (SF) activity assigned to 283112 for the 238U(48Ca,3n) 283112 reaction. Hence, Experiment I was designed to detect spontaneously fissioning (SF) isotopes of element 112 with half-lives (t
1/2) longer than about 20 s. 11 high-energy events were detected. 7 events exhibit a deposition pattern resembling a chromatographic peak in the vicinity of Rn deposition. However, the energy of the events observed in Experiment I was lower than expected for a SF-decay of 283112. Therefore, these events could not be unambiguously attributed to the decay of 283112. In contradiction with earlier publications newer reports from FLNR Dubna claim that 283112 decays by α-particle emission (E
α = 9.5 MeV) with t
1/2 = 4 s followed by a SF-decay of 279Ds (t
1/2 = 0.2 s). Therefore, Experiment II was designed to be sensitive to both claimed decay properties of 283112. However, during this experiment neither short α-SF correlations nor SF coincidences were detected. The conclusion is that 283112 was not unambiguously detected, neither in Experiment I nor in Experiment II.
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Abstract
Summary
Alpha particle activation of natural Bi2O3 results in the formation of astatine radionuclides. A simple and rapid separation method of astatine is presented from the bulk target matrix bismuth by employing liquid-liquid extraction (LLX) method using methylisobutylketone (MIBK) and hydrochloric acid. Back extraction of astatine was performed by ethylenediaminetetraacetic acid (EDTA) solution at pH 10.
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27
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Abstract
Heavy ion activation of natural Sb2O3 with 78 MeV 16O6+ results in the formation of carrier-free praseodymium isotopes, 133,135Pr, and their corresponding decay products 133,135Ce, in the matrix. Also irradiation with ~ 90 MeV 19F7+ beam leads to the production of carrier-free neodymium isotopes, 135-138Nd, which decay out to 135-138Ce via 135-138Pr. Another way for the production of carrier-free 135Ce radionuclide is to irradiate CsNO3 target with 7Li3+ beam of energy 44 MeV. The shorter lived radionuclides of cerium decay out and a radiochemical procedure has been developed for the separation of carrier-free radionuclides from the bulk target matrix antimony and caesium through liquid-liquid extraction (LLX) using Aliquat 336 (tricaprylmethylammonium chloride), and di-(2-ethylhexyl)phosphoric acid (HDEHP) as extractants.
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28
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Hayat H, Bodansky HJ, Nayak D, Ashiq A, McKibbin M, Goyder E. Risk factors for visual impairment registration due to diabetic retinopathy in Leeds, 2002-2005. ACTA ACUST UNITED AC 2009. [DOI: 10.1002/pdi.1348] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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29
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Fan FL, Lei FA, Zhang LN, Bai J, Lin MS, Li XF, Ding HJ, Wu XL, Nayak D, Qin Z. Extraction Behavior of Mo(VI) and W(VI) as Homologs of Sg withα‐Benzoinoxime. Solvent Extraction and Ion Exchange 2009. [DOI: 10.1080/07366290902821305] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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30
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Nayak D, Lahiri S. Studies on separation of no-carrier-added 177W from bulk lutetium. J Radioanal Nucl Chem 2009. [DOI: 10.1007/s10967-009-0523-7] [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: 10/20/2022]
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31
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32
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Nayak D, Kumar MN, Bhaskaranand N. Correlation of Risk Factors with Colonization of Potentially Pathogenic Oropharyngeal Microflora in Infants. Int J Infect Dis 2008. [DOI: 10.1016/j.ijid.2008.05.205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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33
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34
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35
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39
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Mahesh CP, Nayak D. Nucleic acid probes in periodontal diagnosis. Indian J Dent Res 2001; 12:181-3. [PMID: 11808070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023] Open
Abstract
Periodontal Disease is considered as an infection caused by a variety of microorganisms. Considering the vast range of microbial species involved in the causation of periodontal diseases, a specific diagnostic procedure, to identify the various organisms involved is a major necessity. A number of diagnostic procedures, including microbiological and immunological have been utilized in the diagnosis of periodontal disease. The DNA probe technology provides both a sensitive and specific assay and also alleviates concern for transport of the fastidious microorganisms in clinical samples, fulfills the need for a specific and rapid test, that does not require the preservation of viable microorganisms. DNA probes are now being used to identify the various putative pathogen's including; A. actinomycetemcomitans, P. gingivalis, P. intermedia, B. forsythus, etc. Besides DNA probes have also been proven an advantage over the various other available procedures in periodontal diagnosis.
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Affiliation(s)
- C P Mahesh
- Department of Periodontics, College of Dental Surgery, Mangalore, India
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44
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Medhi M, Marshall MC, Burke HB, Hasan R, Nayak D, Reed G, LaFaro R, Southren AL. HbA1c predicts length of stay in patients admitted for coronary artery bypass surgery. Heart Dis 2001; 3:77-9. [PMID: 11975774 DOI: 10.1097/00132580-200103000-00003] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Diabetes mellitus is associated with coronary artery disease, and diabetic patients are frequently referred for coronary bypass graft surgery. It is well known that HbA1c, which reflects long-term glycemic control, is related to diabetic morbidity and mortality. It is not known whether HbA1c is related to postoperative length of stay among patients who undergo coronary artery bypass surgery. The authors evaluated 135 patients who underwent bypass surgery at the Westchester Medical Center (Valhalla, NY). HbA1c was measured in all patients preoperatively; a value of 7% or greater was used as a threshold for uncontrolled hyperglycemia. A postoperative length of stay of 6 days or more was used as the cutoff for an extended length of stay. Linear regression was used to assess the relationship between HbA1c, adjusted for age, and length of stay in days. Logistic regression, with length of stay a binary variable <6, > or =6 days, was used to assess the accuracy of HbA1c <7%, > or =7%, adjusted for age, in predicting length of stay. An HbA1c of 7% or greater was found to be a strong predictor of a length of stay of 6 days or longer. These data suggest that HbA1c can be used as a surrogate marker for cardiac and noncardiac morbidity that prolongs hospitalization after coronary artery bypass surgery.
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Affiliation(s)
- M Medhi
- Department of Medicine, New York Medical College and Westchester Medical Center, Valhalla, New York 10595, USA
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45
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Abstract
Heavy ion activation of natural cobalt foil with 52 MeV 11B4+ and 73 MeV 12C6+ results in the formation of carrier-free (66,67)Ge and (66,67)As radionuclides, respectively, along with their corresponding decay products, (66,67)Ga in the matrix. The carrier free gallium radionuclides have been separated from the bulk target matrix cobalt by employing liquid-liquid extraction method using TOA as liquid anion exchanger.
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Affiliation(s)
- D Nayak
- Chemical Sciences Division, Saha Institute of Nuclear Physics, Calcutta, India
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46
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Abstract
The scope and approaches of the "multitracer technique" have briefly been reviewed. The various aspects of the "multitracer technique" include, the methods of accelerator production of "multitracers" and their separation, the application of this technique in the study of adsorption of metal ions on solid surfaces and in the study of distribution of trace elements in plants and animals.
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Affiliation(s)
- D Nayak
- Chemical Sciences Division, Saha Institute of Nuclear Physics, Calcutta, India.
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47
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Uppoor AS, Nayak D, Sosa KV. Enamel matrix derivative in periodontal reconstructive surgery. A new approach in periodontal regeneration. Indian J Dent Res 2000; 11:95-9. [PMID: 11310094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023] Open
Abstract
True periodontal regeneration is the goal of any periodontal regenerative techniques. Cementum formation is a key event in the development of root and supporting periodontium. Due to its distribution, acellular cementum is the type most affected by early to moderate periodontitis. Studies over the past twenty years demonstrated that, enamel matrix proteins from the root sheath are involved in the formation of acellular, during tooth development. Thus the adjunctive use of enamel matrix derivatives in conjunction with regenerative periodontal surgery could possibly lead to true periodontal regeneration. The purpose of this article is to review the use of enamel matrix derivative in true periodontal regeneration.
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Affiliation(s)
- A S Uppoor
- Department of Periodontics, College of Dental Surgery, Mangalore, India
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48
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Abstract
Carrier free europium isotopes 145,146Eu have been produced by irradiating a CsNO3 target with an 80 MeV 16O beam. Radiochemical separation of the produced europium isotopes from the bulk target matrix of CsNO3 have effectively been done using HDEHP, the liquid cation exchanger.
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Affiliation(s)
- S Lahiri
- Nuclear Chemistry Division, Saha Institute of Nuclear Physics, 1/AF Bidhannagar, Calcutta, India.
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49
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Lahir S, Banerjee K, Nayak D, Ramaswami A, Das NR. Separation of carrier-free hafnium and lutetium radionuclides produced in 16O activated terbium metal target. Appl Radiat Isot 2000; 52:1399-405. [PMID: 10855668 DOI: 10.1016/s0969-8043(99)00167-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Charged particle activation with approximately 88 MeV 16O7+ beam on natural terbium metal foil leads to the production of the short lived carrier-free radioisotopes 170,171Ta and their corresponding daughter products 170,171Hf and 170,171Lu in the target matrix. Liquid-liquid extraction with HDEHP diluted in cyclohexane was carried out for the separation of 170,171Hf and 170,171Lu from the bulk terbium in an aqueous HCl medium.
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Affiliation(s)
- S Lahir
- Nuclear Chemistry Division, Saha Institute of Nuclear Physics, 1/AF Bidhannagar, Calcutta, India.
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Lahiri S, Nayak D, Ramaswami A, Manohor SB. Separation of carrier-free ytterbium and thulium produced in 80 MeV 12C6+ irradiated gadolinium foil target by liquid-liquid extraction with HDEHP. Appl Radiat Isot 2000; 52:797-802. [PMID: 10800715 DOI: 10.1016/s0969-8043(99)00135-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Heavy ion activation of natural gadolinium foil with 80 MeV 12C6+ results in the formation of carrier-free ytterbium isotopes, 165,166,167Yb and their corresponding decay products, 165,166,167Tm, in the matrix. Carrier-free ytterbium and thulium isotopes have been separated quantitatively from the bulk target matrix gadolinium by employing di-(2-ethylhexyl)phosphoric acid (HDEHP) as a liquid cation exchanger.
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Affiliation(s)
- S Lahiri
- Nuclear Chemistry Division, Saha Institute of Nuclear Physics, Bidhannagar, Calcutta, India.
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